WTW Multi 3320 Operating Manual WTW_Multi_3320

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OPERATING MANUAL
ba77053d01 02/2014
Multi 3320
METER FOR 2 SENSORS (PH/ORP/D.O./COND)
25.0
6.093
pH
°C
USB output
15.02.2014
08:37
3320
For Sales & Service Contact
2650 E. 40th Ave. • Denver, CO 80205
Phone 303-320-4764 • Fax 303-322-7242
1-800-833-7958
www.geotechenv.com
2ba77053d01 02/2014
Multi 3320
Copyright © Weilheim 2014, WTW GmbH
Reproduction in whole - or even in part - is prohibited without the
express written permission of WTW GmbH, Weilheim.
Printed in Germany..
For the most recent version of the manual, please visit
www.WTW.com.
Multi 3320 Contents
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Multi 3320 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Multi 3320 meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Safety information in the operating manual . . . . . 8
2.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . 8
2.1.3 Further documents providing safety information . 8
2.2 Safe operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.2 Requirements for safe operation . . . . . . . . . . . . . 9
2.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.1 Inserting the batteries. . . . . . . . . . . . . . . . . . . . . 11
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . 12
4.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.3 Status information (meter) . . . . . . . . . . . . . . . . . 13
4.1.4 Socket field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.2 Measured value display . . . . . . . . . . . . . . . . . . . 16
4.4.3 Menus and dialogs . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.4 Elements in menus and dialogs . . . . . . . . . . . . . 16
4.4.5 Example 1 on navigation: Setting the language. 17
4.4.6 Example 2 on navigation: Setting the date and time
19
4.5 Channel display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.5.1 Display of several sensors in the measuring
mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Contents Multi 3320
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5.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 22
5.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 24
5.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.2 When do you have to calibrate? . . . . . . . . . . . . . 25
5.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . 25
5.2.4 Manual calibration (ConCal) . . . . . . . . . . . . . . . . 28
5.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2.7 Continuous measurement control (CMC
function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6 ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 36
6.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 38
6.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1.1 Measuring the ion concentration . . . . . . . . . . . . 39
7.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 41
7.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 42
7.2.3 Calibration (ISE Cal) . . . . . . . . . . . . . . . . . . . . . . 42
7.2.4 Calibration standards . . . . . . . . . . . . . . . . . . . . . 45
7.2.5 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 45
8 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1.1 Measuring D.O.. . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 49
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 50
8.2.3 Calibration procedures . . . . . . . . . . . . . . . . . . . . 50
8.2.4 Calibration in water vapor-saturated air (air calibra-
tion vessel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.2.5 Calibrating with a Comparison meas. (OxiComp). .
51
8.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 53
9 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Multi 3320 Contents
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9.1.1 Measuring the conductivity. . . . . . . . . . . . . . . . . 55
9.1.2 Measuring the temperature . . . . . . . . . . . . . . . . 57
9.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 57
9.2.3 Determining the cell constant (calibration in control
standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2.4 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . 58
10 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10.1 Measurement settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10.1.1 Settings for pH measurements. . . . . . . . . . . . . . 61
10.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . 62
10.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 64
10.1.4 Settings for ORP measurements . . . . . . . . . . . . 65
10.1.5 Settings for ISE measurements . . . . . . . . . . . . . 66
10.1.6 Settings for D.O. sensors . . . . . . . . . . . . . . . . . . 68
10.1.7 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 69
10.1.8 Settings for conductivity measuring cells . . . . . . 70
10.1.9 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 72
10.1.10 Temperature compensation . . . . . . . . . . . . . . . . 72
10.1.11 Setting the TDS factor . . . . . . . . . . . . . . . . . . . . 73
10.2 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 74
10.2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.2.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
10.3 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
10.3.1 Resetting the measurement settings. . . . . . . . . 75
10.3.2 Resetting the system settings . . . . . . . . . . . . . . 77
11 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
11.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
11.2 Automatic data storage at intervals . . . . . . . . . . . . . . 79
11.3 Measurement data storage . . . . . . . . . . . . . . . . . . . . . . . 81
11.3.1 Editing the measured value storage. . . . . . . . . . 81
11.3.2 Erasing the measurement data storage . . . . . . . 83
11.3.3 Measurement dataset . . . . . . . . . . . . . . . . . . . . 83
11.3.4 Storage locations . . . . . . . . . . . . . . . . . . . . . . . . 83
12 Transmitting data (USB interface). . . . . . . . . . . . . . . . 84
12.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . 84
12.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
12.3 MultiLab Importer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
13 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 86
13.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
13.1.1 General maintenance activities . . . . . . . . . . . . . 86
Contents Multi 3320
6ba77053d01 02/2014
13.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . . 86
13.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
13.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
14 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
14.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
14.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
14.3 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
14.4 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
14.5 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
15.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 94
15.1.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
15.1.2 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
15.1.3 Oxi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
15.1.4 Cond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
15.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
16 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
17 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
18 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Multi 3320 Overview
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1 Overview
1.1 Multi 3320 meter
The Multi 3320 meter enables you to perform measurements (pH, U, ISE, con-
ductivity, dissolved oxygen (D.O.)) quickly and reliably.
The Multi 3320 provides the maximum degree of operating comfort, reliability
and measuring certainty for all applications.
1.2 Sensors
A measuring system ready to measure consists of the Multi 3320 meter and a
suitable sensor.
Suitable sensors are pH electrodes, ion selective electrodes (ISE), ORP elec-
trodes, dissolved oxygen (D.O.) sensors and conductivity measuring cells.
1 Keypad
2 Display
3 Socket field
Information on available sensors is given on the Internet and in the
WTW catalog, "Laboratory and field instrumentation".
25.0
6.093
pH
°C
USB output
15.11.2008
08:37
1
2
3
3320
Safety instructions Multi 3320
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2 Safety instructions
2.1 Safety information
2.1.1 Safety information in the operating manual
This operating manual provides important information on the safe operation of
the meter. Read this operating manual thoroughly and make yourself familiar
with the meter before putting it into operation or working with it. The operating
manual must be kept in the vicinity of the meter so you can always find the infor-
mation you need.
Important safety instructions are highlighted in this operating manual. They are
indicated by the warning symbol (triangle) in the left column. The signal word
(e.g. "CAUTION") indicates the level of danger:
NOTE
indicates a possibly dangerous situation where goods might be damaged
if the actions mentioned are not taken.
2.1.2 Safety signs on the meter
Note all labels, information signs and safety symbols on the meter and in the
battery compartment. A warning symbol (triangle) without text refers to safety
information in this operating manual.
2.1.3 Further documents providing safety information
The following documents provide additional information, which you should
observe for your safety when working with the measuring system:
• Operating manuals of sensors and other accessories
• Safety datasheets of calibration or maintenance accessories (such as buffer
solutions, electrolyte solutions, etc.)
WARNING
indicates a possibly dangerous situation that can lead to seri-
ous (irreversible) injury or death if the safety instruction is not
followed.
CAUTION
indicates a possibly dangerous situation that can lead to
slight (reversible) injury if the safety instruction is not fol-
lowed.
Multi 3320 Safety instructions
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2.2 Safe operation
2.2.1 Authorized use
This meter is authorized exclusively for pH, ISE, ORP, dissolved oxygen and
conductivity measurements in a laboratory environment.
Only the operation and running of the meter according to the instructions and
technical specifications given in this operating manual is authorized (see
section 15 TECHNICAL DATA, page 94).
Any other use is considered unauthorized.
2.2.2 Requirements for safe operation
Note the following points for safe operation:
• The meter may only be operated according to the authorized use specified
above.
• The meter may only be supplied with power by the energy sources
mentioned in this operating manual.
• The meter may only be operated under the environmental conditions
mentioned in this operating manual.
• The meter may only be opened if this is explicitly described in this operating
manual (example: Inserting the batteries).
2.2.3 Unauthorized use
The meter must not be put into operation if:
• it is visibly damaged (e.g. after being transported)
• it was stored under adverse conditions for a lengthy period of time (storing
conditions, see section 15 TECHNICAL DATA, page 94).
Commissioning Multi 3320
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3 Commissioning
3.1 Scope of delivery
-MeterMulti 3320
-4 batteries 1.5 V Mignon type AA
-Short instructions
-CD-ROM with
– USB drivers
– detailed operating manual
– Software MultiLab Importer
3.2 Power supply
The Multi 3320 is supplied with power in the following ways:
-Battery operation (4 x alkaline manganese batteries, type AA)
-USB operation via a connected USB-B cable
3.3 Initial commissioning
Perform the following activities:
-Insert the supplied batteries
-Switch on the meter (see
section 4.2 SWITCHING ON THE METER, page 14)
-Set the date and time (see
section 4.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME, page
19)
Multi 3320 Commissioning
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3.3.1 Inserting the batteries
You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.
1Screws
2 Battery compartment
1. Unscrew the two screws (1) on the underside of the meter.
2. Open the battery compartment (2) on the underside of the meter.
CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly.
The ± signs on the batteries must correspond to the ± signs in
the battery compartment.
3. Place four batteries (type Mignon AA) in the battery compartment.
4. Close the battery compartment (2) and tighten the screws (1).
5. Set the date and time
(see section 4.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND
TIME, page 19).
2
1
Operation Multi 3320
12 ba77053d01 02/2014
4Operation
4.1 General operating principles
4.1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <ENTER>) generally indicates a short keystroke (under
2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated
by the underscore behind the key symbol (e.g. <ENTER__>).
<F1>:
<F1__>:
<F2>:
<F2__>:
Softkeys providing situation dependent functions, e.g.:
<F2>/[USB output]:
Outputs data to the USB interface
<F2__>/[USB output]:
Configures the automatic data output to the USB inter-
face
<On/Off>: Switches the meter on or off
<M>: Selects the measured parameter / Quits the settings
<CAL>:
<CAL__>:
Calls up the calibration procedure
Displays the calibration data
<STO>:
<STO__>:
Saves a measured value manually
Opens the menu for the automatic save function
<RCL>:
<RCL__>:
Displays the manually stored measured values
Displays the automatically stored measured values
<><>:
<_><_>:
Menu control, navigation
Increments, decrements values
Increments, decrements values continuously
<ENTER>:
<ENTER__>:
Opens the menu for measurement settings / confirms
entries
Opens the menu for system settings
<AR> Freezes the measured value (HOLD function)
Switches the AutoRead measurement on or off
F1
F2
RCL
Multi 3320 Operation
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4.1.2 Display
4.1.3 Status information (meter)
1 Status information (sensor)
2 Measured value (with unit)
3 Measured parameter
4 Continuous measurement control (CMC function)
5 Channel display: Plug position of the sensor
6 Sensor symbol (calibration evaluation, calibration interval)
7 Measured temperature (with unit)
8 Status information (meter)
9 Softkeys and date + time
AR Stability control (AutoRead) is active
HOLD Measured value is frozen (<AR> key)
Batteries are almost empty
Data are automatically output to the USB-B inter-
face at intervals
HOLD AR
25.0
6.093
pH
°C
4
3
2
6
7
8
9
1
AutoCal TEC
5
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Operation Multi 3320
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4.1.4 Socket field
4.2 Switching on the meter
1 pH electrode
2 Temperature sensor
3 Oxygen sensor or conductivity measuring cell
4 Mini USB-B interface
5 Service interface
CAUTION
Only connect sensors to the meter that cannot return any volt-
ages or currents that are not allowed (> SELV and > current
circuit with current limiting).
Almost all customary sensors fulfill these conditions.
1. Switch the meter on with <On/Off>.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test is being
performed.
The measured value display appears.
514
23
pH
6.949
25.0
°C
USB output
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14:15
Multi 3320 Operation
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4.3 Switching off
Automatic switch-off The instrument has an automatic switch-off function in order to save the
batteries (see section 10.2.1 SYSTEM, page 74). The automatic switchoff func-
tion switches off the meter if no key is pressed for an adjustable period.
The automatic switchoff function is not active
-if the communication cable is connected
-if the Automatic data storage function is active, or with automatic data trans-
mission
Display illumination The meter automatically switches off the display illumination if no key is
pressed for 30 seconds. The illumination is switched on with the next keystroke
again.
You can also generally switch the display illumination on or off (see section
10.2.1 SYSTEM, page 74).
4.4 Navigation
The principles of navigation in menus and dialogs are explained in the following
sections.
4.4.1 Operating modes
The instrument has the following operating modes:
Only those displays and functions are available in the active operating mode
that are currently being required.
1. Switch the printer off with <On/Off>.
Operating
mode
Description
Measuring The measurement data of the connected sensor are shown
in the measured value display
Calibration The course of a calibration with calibration information, func-
tions and settings is displayed
Storage in
memory
The meter stores measuring data automatically or manually
Transmit-
ting data
The meter transmits measuring data and calibration records
to a USB-B interface automatically or manually.
Setting The system menu or a sensor menu with submenus, set-
tings and functions is displayed
Operation Multi 3320
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4.4.2 Measured value display
In the measured value display, open the setting menus with <ENTER>. The
current functions of the softkeys are shown on the display.
-Use <ENTER> (short pressure) to open the menu for calibration and mea-
surement settings for the displayed measured parameter.
-Use <ENTER__> (long keystroke (approx. 2 s) to open the Storage & config
menu with the sensor-independent settings.
Use the keys of the keypad to carry out further functions such as storage or cali-
bration (see section 4.1.1 KEYPAD, page 12). These functions are not available
in other operating situations.
4.4.3 Menus and dialogs
The menus for settings and dialogs in procedures contain further subelements.
-To select a subelement, use the <><> keys. The current selection is dis-
played with a frame.
-To make further settings, switch to the next higher menu level with
<F1>[Back].
-Use <M> to return to the measured value display.
4.4.4 Elements in menus and dialogs
-Submenus
The name of the submenu is displayed at the upper edge of the frame. Sub-
menus are opened by confirming with <ENTER>. Example:
-Settings
Settings are indicated by a colon. The current setting is displayed on the
right-hand side. The setting mode is opened with <ENTER>. Subsequently,
the setting can be changed with <><> and <ENTER>. Example:
General
Interface
Clock
Service information
Reset
System
15.02.2014
14:15
Back
Multi 3320 Operation
ba77053d01 02/2014 17
-Functions
Functions are designated by the name of the function. They are immediately
carried out by confirming with <ENTER>.
Example: Display the Calibration record function.
-Messages
Information is marked by the
i
symbol. It cannot be selected. Example:
4.4.5 Example 1 on navigation: Setting the language
1. Press the <On/Off> key.
The measured value display appears.
The instrument is in the measuring mode.
Language: Deutsch
Beep:Off
Illumination:On
Contrast:50 %
Switchoff time:1 h
Temperature unit:°C
Stability control:On
General
15.02.2014
14:15
Back
Calibration record
Calibration data storage
Buffer:TEC
One point calibration:Yes
Calibration interval:7 d
Unit for slope:mV/pH
i
2.00 4.01 7.00 10.01
pH
15.02.2014
14:15
Back
Calibration record
Calibration data storage
Buffer:TEC
One point calibration:Yes
Calibration interval:7 d
Unit for slope:mV/pH
i
2.00 4.01 7.00 10.01
pH
15.02.2014
14:15
Back
Operation Multi 3320
18 ba77053d01 02/2014
2. Using <ENTER__> , open the Storage & config menu.
The instrument is in the setting mode.
3. Select the System submenu with <><>.
The current selection is displayed with a frame.
4. Open the System submenu with <ENTER>.
5. Select the General submenu with <><>.
The current selection is displayed with a frame.
6. Open the General submenu with <ENTER>.
pH
6.949
25.0
°C
USB output
15.02.2014
14:15
System
Data storage
Storage & config
15.02.2014
14:15
Back
General
Interface
Clock
Service information
Reset
System
15.02.2014
14:15
Back
Multi 3320 Operation
ba77053d01 02/2014 19
4.4.6 Example 2 on navigation: Setting the date and time
The meter has a clock with a date function. The date and time are shown in the
measured value display.
When storing measured values and calibrating, the current date and time are
automatically stored as well.
The correct setting of the date and time and date format is important for the fol-
lowing functions and displays:
-Current date and time
-Calibration date
-Identification of stored measured values.
Therefore, check the time at regular intervals.
7. Open the setting mode for the Language with <ENTER>.
8. Select the required language with <><>.
9. Confirm the setting with <ENTER>.
The meter switches to the measuring mode.
The selected language is active.
After a fall of the supply voltage (empty batteries), the date and time
are reset to 01.01.2011 00, 00:00 hours.
Language: Deutsch
Beep:Off
Illumination:On
Contrast:50 %
Switchoff time:1 h
Temperature unit:°C
Stability control:On
General
15.02.2014
14:15
Back
Language: Deutsch
Beep:Off
Illumination:On
Contrast:50 %
Switchoff time:1 h
Temperature unit:°C
Stability control:On
General
15.02.2014
14:15
Back
Operation Multi 3320
20 ba77053d01 02/2014
The date format can be switched from the display of day, month, year
(dd.mm.yyyy) to the display of month, day, year (mm/dd/yyyy or mm.dd.yyyy).
1. In the measured value display:
Using <ENTER__> , open the Storage & config menu.
The instrument is in the setting mode.
2. Select and confirm the System / Clock menu with <><> and
<ENTER>.
The setting menu for the date and time opens up.
3. Select and confirm the Time menu with <><> and <ENTER>.
The hours are highlighted.
4. Change and confirm the setting with <><> and <ENTER>.
The minutes are highlighted.
5. Change and confirm the setting with <><> and <ENTER>.
The seconds are highlighted.
6. Change and confirm the setting with <><> and <ENTER>.
The time is set.
7. If necessary, set the Date and Date format. The setting is made similarly
to that of the time.
8. To make further settings, switch to the next higher menu level with
[Back]<F1>.
or
Switch to the measured value display with <M>.
The instrument is in the measuring mode.
Date format:dd.mm.yyyy
Date:15.02.2014
Time:14:15:25
Clock
15.02.2014
14:15
Back
Multi 3320 Operation
ba77053d01 02/2014 21
4.5 Channel display
The Multi 3320 manages the connected sensors and displays which sensor is
plugged to which connection.
4.5.1 Display of several sensors in the measuring mode
The measured values of the connected sensors can be displayed in the follow-
ing ways:
-Clear display of all connected sensors
-Detailed display of one sensor
(e.g. incl. CMC feature with pH sensors)
With the softkey you can very easily switch between the two display types. The
suitable softkey is displayed depending on the operating situation.
Channel display
Display of the plug position
for the respective parameter
The filled bar indicates for
each connected sensor to
which plug position of the
meter it is connected.
pH
6.949
24.8 °C
15.02.2014
14:15 USB output
pH 6.966
25.0 °C
ϰ
0.479 1/cm
25.0 °C
15.02.2014
14:15 USB output
pH
6.966
25.0
°C
15.02.2014
14:15 USB output
pH value Multi 3320
22 ba77053d01 02/2014
5 pH value
5.1 Measuring
5.1.1 Measuring the pH value
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Stability control
(AutoRead)
& HOLD function
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
The measured parameter flashes on the display
-as soon as the measured value is outside the stability range
-when the automatic Stability control is switched off.
You can activate or switch off the automatic Stability control function (see
section 10.2.1 SYSTEM, page 74).
To ensure the high measurement accuracy of the measuring sys-
tem, always measure with a calibrated electrode (see section 5.2
CALIBRATION, page 25).
1. Connect the pH electrode to the meter.
2. If necessary, select the measured parameter with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. Immerse the pH electrode in the test sample.
The measured value is checked for stability (automatic stability control).
The display of the measured parameter flashes.
5. Wait for a stable measured value.
The display of the measured parameter no longer flashes.
pH
6.949
24.8 °C
USB output
15.02.2014
14:15
Multi 3320 pH value
ba77053d01 02/2014 23
Criteria for a stable
measured value
The Stability control function checks whether the measured values are stable
within the monitored time interval.
The minimum duration until a measured value is assessed as stable is the
monitored time interval. The actual duration is mostly longer.
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
The HOLD function is active.
You can terminate the Stability control function and the HOLD func-
tion with <AR> or <M> at any time.
2. Using <ENTER>, activate the Stability control function manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the display of
the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable mea-
sured value is recognized. The progress bar disappears and the display
of the measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the Stability control function manu-
ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3. Using <ENTER>, start a further measurement with stability control.
or
Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back to the
previous indication.
Measured vari-
able
Time interval Stability in the time interval
pH value 15 seconds Δ : better than 0.01 pH
Temperature 15 seconds Δ : better than 0.5 °C
pH value Multi 3320
24 ba77053d01 02/2014
5.1.2 Measuring the temperature
For reproducible pH measurements, it is essential to measure the temperature
of the test sample.
You have the following options to measure the temperature:
-Automatic measurement of the temperature with the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.
-Measurement by an external temperature sensor.
-Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable sensor is connected
and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:
If you wish to measure (or calibrate) without temperature sensor, proceed as
follows:
Tempera-
ture sensor
Resolution of
the temp. dis-
play Temp. measurement
yes 0.1 °C Automatic with temperature sensor
- 1 °C Manual
1. Measure the current temperature of the test sample.
2. In the <ENTER>/pH/Man. temperature menu, set the temperature value
with <><>.
Multi 3320 pH value
ba77053d01 02/2014 25
5.2 Calibration
5.2.1 Why calibrate?
pH electrodes age. This changes the zero point (asymmetry) and slope of the
pH electrode. As a result, an inexact measured value is displayed. Calibration
determines and stores the current values of the zero point and slope of the
electrode.
Thus, you should calibrate at regular intervals.
5.2.2 When do you have to calibrate?
-After connecting a sensor
-Routinely within the framework of the company quality assurance
-When the calibration interval has expired
5.2.3 Automatic calibration (AutoCal)
Make sure that in the sensor menu, Buffer menu, the buffer set is correctly
selected (see 10.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE 61).
Use any one to five buffer solutions of the selected buffer set in ascending or
descending order.
Below, calibration with Technical buffers (TEC) is described. When other buffer
sets are used, other nominal buffer values are displayed. Apart from that, the
procedure is identical.
If single-point calibration was set in the menu, the calibration proce-
dure is automatically finished with the measurement of buffer solu-
tion 1 and the calibration record is displayed.
1. Connect the pH electrode to the meter.
2. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
3. In the measured value display, select the measured parameter pH or mV
with <M>.
4. Start the calibration with <CAL>.
The calibration display for the first buffer appears (voltage display).
pH value Multi 3320
26 ba77053d01 02/2014
Continuing with two-
point calibration
5. Thoroughly rinse the electrode with deionized water.
6. Immerse the electrode in the first buffer solution.
7. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
8. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
9. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
10. If necessary, finish the calibration procedure as a single-point calibration
with <M>.
The calibration record is displayed.
For single-point calibration, the instrument uses the Nernst slope
(-59.2 mV/pH at 25 °C) and determines the zero point of the elec-
trode.
pH 1
-180.0
24.8 °C
AutoCal TEC
15.02.2014
14:15
Buffer
mV
pH
-180.0
24.8 °C
AutoCal TEC
10.011
15.02.2014
14:15
AR
Buffer
mV
11. Thoroughly rinse the electrode with deionized water.
12. Immerse the electrode in the second buffer solution.
Multi 3320 pH value
ba77053d01 02/2014 27
Continuing with
three- to five-point
calibration
13. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
14. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
15. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the next buffer appears (voltage display).
16. If necessary, finish the calibration procedure as a two-point calibration
with <M>.
The calibration record is displayed.
pH
0.0
24.8 °C
AutoCal TEC
7.000
15.02.2014
14:15
AR
Buffer
mV
17. Thoroughly rinse the electrode with deionized water.
18. Immerse the electrode in the next buffer solution.
19. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
20. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
pH value Multi 3320
28 ba77053d01 02/2014
5.2.4 Manual calibration (ConCal)
Make sure that in the sensor menu, Buffer menu, the ConCal buffer set is
selected (see section 10.1.1 SETTINGS FOR PH MEASUREMENTS, page 61).
Use any one to five buffer solutions in ascending or descending order.
21. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the next buffer appears (voltage display).
22. If necessary, use <M> to finish calibration or
Continue calibrating using the next buffer with <ENTER>.
Calibration is automatically completed after the last buffer of a buf-
fer set has been measured. Then the calibration record is dis-
played.
The calibration line is determined by linear regression.
If single-point calibration was set in the menu, the calibration proce-
dure is automatically finished with the measurement of buffer solu-
tion 1 and the calibration record is displayed.
1. Connect the pH electrode to the meter.
The pH measuring window is displayed.
2. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
3. In the measured value display, select the measured parameter pH or mV
with <M>.
4. Start the calibration with <CAL>.
The calibration display appears (voltage display).
pH
180.0
24.8 °C
AutoCal TEC
4.010
15.02.2014
14:15
AR
Buffer
mV
Multi 3320 pH value
ba77053d01 02/2014 29
5. Thoroughly rinse the electrode with deionized water.
6. Immerse the electrode in the first buffer solution.
7. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
8. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
9. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration display for the setting of the nominal buffer value appears.
10. Set the nominal buffer value for the measured temperature with
<><>.
pH
0.0
24.8 °C
ConCal
1
15.02.2014
14:15
Buffer
mV
pH
0.0
24.8 °C
ConCal
7.000
15.02.2014
14:15
Buffer
mV
AR
pH
7.000
24.8 °C
ConCal
1
15.02.2014
14:15
Buffer
pH value Multi 3320
30 ba77053d01 02/2014
Continuing with two-
point calibration
11. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
12. If necessary, finish the calibration procedure as a single-point calibration
with <M>.
The calibration record is displayed.
For single-point calibration, the instrument uses the Nernst slope
(-59.2 mV/pH at 25 °C) and determines the zero point of the elec-
trode.
13. Thoroughly rinse the electrode with deionized water.
14. Immerse the electrode in the second buffer solution.
15. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
16. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
17. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the setting of the nominal buffer value appears.
18. Set the nominal buffer value for the measured temperature with
<><>.
19. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
20. Finish the calibration procedure as a two-point calibration with <M>.
The calibration record is displayed.
pH
4.035
24.8 °C
ConCal
2
15.02.2014
14:15
Buffer
Multi 3320 pH value
ba77053d01 02/2014 31
Continuing with
three- to five-point
calibration
5.2.5 Calibration points
Calibration can be performed using one to five buffer solutions in any order
(single-point to five-point calibration). The meter determines the following
values and calculates the calibration line as follows:
21. Thoroughly rinse the electrode with deionized water.
22. Immerse the electrode in the next buffer solution.
23. When measuring without temperature sensor:
– Temper the buffer solution, or measure the current temperature.
– Enter the temperature value in the menu.
24. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control). The [AR]
status indicator is displayed. A progress bar is displayed and the display
of the measured parameter flashes.
25. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the setting of the nominal buffer value appears.
26. Set the nominal buffer value for the measured temperature with
<><>.
27. Accept the set calibration value with <ENTER>.
The calibration display for the next buffer appears (voltage display).
28. Use <M> to finish calibration or
Continue calibrating using the next buffer with <ENTER>.
After the fifth buffer has been measured the calibration is automat-
ically finished. Then the calibration record is displayed.
The calibration line is determined by linear regression.
pH
9.958
24.8 °C
ConCal
3
15.02.2014
14:15
Buffer
pH value Multi 3320
32 ba77053d01 02/2014
5.2.6 Calibration data
Displaying the cali-
bration data
The calibration record of the last calibration is to be found under the menu item,
<ENTER> / Calibration / Calibration record. To open it, press the <CAL__> key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>[USB output] key.
Displaying the cali-
bration data storage
The calibration records of the last calibrations (up to 10) are given in the menu,
<ENTER>/Calibration / Calibration data storage.
Determined
values
Displayed calibration data
1-point Asy -Zero point = Asy
-Slope = Nernst slope
(-59.2 mV/pH at 25 °C)
2-point Asy
Slp.
-Zero point = Asy
-Slope = Slp.
3-point to
5-point
Asy
Slp.
-Zero point = Asy
-Slope = Slp.
The calibration line is calculated by lin-
ear regression.
You can display the slope in the units, mV/pH or % (see section
10.1.1 SETTINGS FOR PH MEASUREMENTS, page 61).
The calibration record is automatically transmitted to the interface
after calibrating.
Multi 3320 pH value
ba77053d01 02/2014 33
Calibration evalua-
tion
After calibrating, the meter automatically evaluates the calibration. The zero
point and slope are evaluated separately. The worse evaluation of both is taken
into account. The evaluation appears on the display and in the calibration
record.
Menu item Setting/func-
tion
Description
Calibration / Calibra-
tion data storage /
Display
- Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the mea-
sured value display with <M>.
Calibration / Calibra-
tion data storage /
Output to USB
- Outputs the calibration records to
the interface.
Display Calibration
record
Zero point
[mV]
Slope
[mV/pH]
+++ -15 ... +15 -60.5 ... -58.0
++ -20 ... <-15
or
>+15 ... +20
>-58.0 ... -57.0
+-25 ... <-20
or
>+20 ... +25
-61.0 ... <-60.5
or
>-57.0 ... -56.0
--30 ... <-25
or
>+25 ... +30
-62.0 ... <-61.0
or
>-56.0 ... -50.0
Clean the electrode according to the elec-
trode operating manual
Error Error <-30 or
>+30
<-62.0 or
>-50.0
Error elimination (see section 14 WHAT TO
DO IF..., page 88)
pH value Multi 3320
34 ba77053d01 02/2014
Calibration record
(example)
5.2.7 Continuous measurement control (CMC function)
The Continuous Measurement Control (CMC function) facilitates to evaluate
the current measured value instantly and definitely.
After each successful calibration the scale of the pH measuring range is
displayed in the measured value display. Here you can very clearly see
whether or not the current measured value is in the calibrated part of the
measuring range.
Multi 3320
Ser. no. 11292113
CALIBRATIONpH
15.02.2014 15:55
AutoCal TEC
Buffer 1 4.01
Buffer 2 7.00
Buffer 3 10.01
Voltage 1 184.0 mV
Voltage 2 3.0 mV
Voltage 3 -177.0 mV
Temperature 1 24.0 °C
Temperature 2 24.0 °C
Temperature 3 24.0 °C
Slope -60.2 mV/pH
Asymmetry 4.0 mV
Sensor +++
etc...
Multi 3320 pH value
ba77053d01 02/2014 35
The following information is displayed:
The limits of the calibrated range are determined by the buffers used for cali-
bration:
1 Measuring range for which a valid calibration is available (white).
Measured values in this range are suitable for documentation.
2 Measuring range for which no valid calibration is available (shaded).
Measured values in this range are not suitable for documentation. If
necessary, calibrate the meter with buffers covering this measuring
range.
If the current measured value is outside the calibrated range, this
area is shaded stronger.
If a measured value is outside the measuring range pH 0 - 14, over-
flow arrows are displayed at the left or right edge of the measuring
range.
3 Currently measured pH value (needle)
4 Marking lines for all nominal buffer values used with the last valid cali-
bration
Lower limit: Buffer with lowest pH value - 2 pH units
Upper limit: Buffer with highest pH value + 2 pH units
25.0
6.093
1
2
3
4
pH
°C
014
15.02.2014
14:15 USB output
ORP voltage Multi 3320
36 ba77053d01 02/2014
6 ORP voltage
6.1 Measuring
6.1.1 Measuring the ORP
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Stability control
(AutoRead )
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
You can activate or switch off the automatic Stability control function (see
section 10.2.1 SYSTEM, page 74).
The measured parameter flashes on the display
-as soon as the measured value is outside the stability range
-when you switch over between the measured parameters with <M>.
-when the automatic Stability control is switched off.
Criteria for a stable
measured value
The Stability control function checks whether the measured values are stable
within the monitored time interval.
1. Connect the ORP electrode to the meter.
2. If necessary, select the U (mV) display with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. Rinse the ORP electrode and immerse it in the test sample.
The measured value is checked for stability (automatic stability control).
The display of the measured parameter flashes.
5. Wait for a stable measured value.
The display of the measured parameter no longer flashes.
U
157.0 mV
24.8 °C
USB output
15.02.2014
14:15
Multi 3320 ORP voltage
ba77053d01 02/2014 37
The minimum duration until a measured value is assessed as stable is the
monitored time interval. The actual duration is mostly longer.
Manually starting
the stability control
Irrespective of the setting for automatic Stability control (see section 10.2.1
SYSTEM, page 74) in the System menu, you can start the Stability control func-
tion manually at any time.
Freezing the mea-
sured value (HOLD
function)
With the HOLD function, you can freeze the current measured value. The dis-
played measured value stops changing until you switch the HOLD function off.
Measured variable Time interval Stability in the time interval
ORP 15 seconds Δ : better than 0.3 mV
Temperature 15 seconds Δ : better than 0.5 °C
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Using <ENTER>, activate the Stability control function manually.
The [AR] status indicator appears while the measured value is assessed
as not stable. A progress bar is displayed and the display of the measured
parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable measured
value is recognized. The progress bar disappears and the display of the
measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the Stability control function manu-
ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3. Using <ENTER>, start a further measurement with Stability control.
or
Release the frozen measured value again with <AR>.
The display switches to the measured value display.
The [AR][HOLD] status display disappears.
If the HOLD function is active, you can, e.g. start a manual mea-
surement with stability control.
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2. Release the frozen measured value again with <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.
ORP voltage Multi 3320
38 ba77053d01 02/2014
6.1.2 Measuring the temperature
For reproducible ORP measurements, it is essential to measure the tempera-
ture of the test sample.
You have the following options to measure the temperature:
-Automatic measurement of the temperature by the temperature sensor
(NTC30 or Pt1000) integrated in electrode.
-Measurement by an external temperature sensor.
-Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable sensor is connected
and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:
If you wish to measure without temperature sensor, proceed as follows:
6.2 ORP calibration
Temperature
sensor
Resolution of
the temp. dis-
play Temp. measurement
yes 0.1 °C Automatic with temperature sensor
- 1 °C Manual
1. Measure the current temperature of the test sample.
2. Set the temperature value with <><>.
or
In the <ENTER>/U/Man. temperature menu, set the temperature value
with <><>.
ORP electrodes are not calibrated. You can, however, check ORP
electrodes by measuring the ORP of a test solution and comparing
the value with the nominal value.
Multi 3320 Ion concentration
ba77053d01 02/2014 39
7 Ion concentration
7.1 Measuring
7.1.1 Measuring the ion concentration
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Incorrect calibration of ion sensitive electrodes will result in incor-
rect measured values. Calibrate regularly before measuring.
For precise ISE measurements the temperature difference
between measurement and calibration should not be greater that
2 K. Therefore, adjust the temperature of the standard and
measuring solutions accordingly. If the temperature difference is
greater the [TempErr] warning appears in the measured value
display.
1. Connect the ISE combination electrode to the meter.
The pH/U/ISE measuring window is displayed.
2. If necessary, select the ISE display (unit, mg/l) with <M>.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. Calibrate or check the meter with the electrode.
While no valid calibration is available, e.g. in the delivery condition,
"Error" appears in the measured value display.
5. Immerse the electrode in the test sample.
ISE
0.157 mg/l
25.0
°C
Ag
USB output
15.02.2014
12:12
Ion concentration Multi 3320
40 ba77053d01 02/2014
Stability control
(AutoRead)
& HOLD function
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
The measured parameter flashes on the display
-as soon as the measured value is outside the stability range
-when the automatic Stability control is switched off.
You can activate or switch off the automatic Stability control function (see
section 10.2.1 SYSTEM, page 74).
Criteria The AutoRead criteria affect the reproducibility of the measured values. The
following criteria can be adjusted:
-high: highest reproducibility
-medium: medium reproducibility
-low: lowest reproducibility
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
The HOLD function is active.
You can terminate the Stability control function and the HOLD func-
tion with <AR> or <M> at any time.
2. Using <ENTER>, activate the Stability control function manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the display of
the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable mea-
sured value is recognized. The progress bar disappears and the display
of the measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the Stability control function manu-
ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3. Using <ENTER>, start a further measurement with stability control.
or
Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back to the
previous indication.
Multi 3320 Ion concentration
ba77053d01 02/2014 41
7.1.2 Measuring the temperature
For reproducible ion-selective measurements, it is essential to measure the
temperature of the test sample.
You have the following options to measure the temperature:
-Measurement by an external temperature sensor.
-Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable sensor is connected
and automatically switches on the temperature measurement.
The display of the temperature indicates the active temperature measuring
mode:
If you wish to measure (or calibrate) without temperature sensor, proceed as
follows:
Increasing reproducibility also causes the response time to
increase until a measured value is evaluated as stable.
Tempera-
ture sensor
Resolution of
the temp. dis-
play Temp. measurement
yes 0.1 °C Automatic with temperature sensor
- 1 °C Manual
1. Measure the current temperature of the test sample.
2. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
Ion concentration Multi 3320
42 ba77053d01 02/2014
7.2 Calibration
7.2.1 Why calibrate?
Ion-selective electrodes age and are temperature-dependent. This changes
the slope. As a result, an inexact measured value is displayed. Calibration
determines the calibration line of the electrode and stores this value in the
meter.
Thus, you should calibrate before each measurement and at regular intervals.
7.2.2 When to calibrate?
-Before any measurement if possible
-After connecting another ISE electrode
-When the sensor symbol flashes, e.g. after a voltage interruption (empty
batteries)
7.2.3 Calibration (ISE Cal)
ISE Cal is the conventional two-point to seven-point calibration procedure
that uses 2 to 7 freely selectable standard solutions. The concentration
expected in the measurement determines the concentration of the calibration
standards.
1. Connect the ISE combination electrode to the meter.
The pH/U/ISE measuring window is displayed.
2. Keep the standard solutions ready.
3. When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
– Enter the temperature value in the menu.
4. In the measured value display, select the ISE measuring window with
<><> and <M>.
5. If necessary, change the unit of the measurement result and calibration
standards in the ISE setup/Unit menu.
6. Start the calibration with <CAL>.
The calibration display appears.
ISE
0.0
24.8 °C
Ag 0.010 mg/l
1
15.02.2014
12:12
Standard
mV
Multi 3320 Ion concentration
ba77053d01 02/2014 43
Continuing with two-
point calibration
7. Thoroughly rinse the electrode with distilled water.
8. Immerse the electrode in standard solution 1.
9. When calibrating without temperature sensor:
-Measure the temperature of the standard solution using a thermom-
eter.
-Use <F2>/[ ⇅] to select the setting of the temperature.
-Use <><> to set the temperature.
-Use <F2>/[ ⇅] to select the setting of the concentration.
10. Set the concentration of the standard solution with <><> and press
<ENTER>.
The standard solution is measured.
The measured value is checked for stability (AutoRead).
11. Wait for the end of the AutoRead measurement or accept the calibration
value with <ENTER>.
The calibration display for the next standard solution appears.
ISE
0.0
24.8 °C
15.02.2014
12:12
0.01 mg/l
mV
AR
ISE
0.0
24.8 °C
Ag 0.020 mg/l
2
15.02.2014
12:12
Standard
mV
12. Thoroughly rinse the electrode with distilled water.
13. Immerse the electrode in standard solution 2.
Ion concentration Multi 3320
44 ba77053d01 02/2014
Continuing with
three- to seven-point
calibration
Repeat the steps 12 to 17 in the same way with the third and further standard
solutions as necessary. The new calibration values are displayed after the last
calibration step was completed.
14. When calibrating without temperature sensor:
-Measure the temperature of the standard solution using a thermom-
eter.
-Use <F2>/[ ⇅] to select the setting of the temperature.
-Use <><> to set the temperature.
-Use <F2>/[ ⇅] to select the setting of the concentration.
15. Set the concentration of the standard solution with <><> and
press <ENTER>.
The standard solution is measured.
The measured value is checked for stability (AutoRead).
16. Wait for the end of the AutoRead measurement or accept the calibra-
tion value with <ENTER>.
The calibration display for the next standard solution appears.
17. Press <ENTER> to continue with three-point calibration.
or
Finish the calibration procedure as a two-point calibration with <M>.
The new calibration values are displayed.
ISE
8.9
24.8 °C
15.02.2014
12:12
0.02 mg/l
mV
AR
ISE
20.5
24.8 °C
Ag 0.050 mg/l
3
15.02.2014
12:12
Standard
mV
Based on the calibration data, the calibration curve is determined
in sections, according to the Nernst equation modified by Nikolski.
Multi 3320 Ion concentration
ba77053d01 02/2014 45
7.2.4 Calibration standards
Use two to seven different standard solutions. The standard solutions have to
be selected in either increasing or decreasing order.
7.2.5 Calibration data
Displaying the cali-
bration data
The calibration record of the last calibration is to be found under the menu item,
<ENTER> / Calibration / Calibration record. To open it, press the <CAL__> key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>[USB output] key.
Displaying the cali-
bration data storage
The calibration records of the last calibrations (up to 10) are given in the menu,
<ENTER>/Calibration / Calibration data storage.
Select the unit of the standard solution and measurement result in
the ISE setup/Unit menu.
Standard solution (Std 1 - 7) Values
Unit [mg/l] 0.010 ... 500.000
Unit [mol/l] 0.100 ... 5.000 µmol/l
10.00 ... 5.000 mmol/l
Unit [mg/kg] 0.010 ... 500.000
Unit [ppm] 0.010 ... 500.000
Unit [%] 0.001 ... 50.000
The measurement precision is also dependent on the selected
standard solutions. Therefore, the selected standard solutions
should cover the value range expected of the following concentra-
tion measurement.
If the measured electrode potential is outside the calibrated range,
the [ISEErr] warning is displayed.
Ion concentration Multi 3320
46 ba77053d01 02/2014
Calibration evalua-
tion
After calibrating, the meter automatically evaluates the calibration.
Calibration record
(example)
Menu item Setting/func-
tion
Description
Calibration / Calibra-
tion data storage /
Display
- Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the mea-
sured value display with <M>.
Calibration /
Calibration data stor-
age / Output to USB
- Outputs the calibration records to
the interface.
Display Calibration
record
Magnitude of the slope [mV]
+++ 50.0 ... 70.0 or 25.0 ... 35.0
Error Error < 50 or > 70
or
< 25 or > 35
Error elimination (see section 13 WHAT TO
DO IF..., page 89)
Multi 3320
Ser. no. 12345678
CALIBRATIONISE
15.02.2014 08:09:10
Standard 1 0.010 mg/l
Standard 2 0.020 mg/l
Voltage 1 38.5 mV
Voltage 2 58.0 mV
Temperature 1 24.0 øC
Temperature 2 24.0 øC
Ion type Ag
Slope 64.7 mV
Sensor +++
_____________________________________
Multi 3320 Dissolved oxygen
ba77053d01 02/2014 47
8 Dissolved oxygen
8.1 Measuring
8.1.1 Measuring D.O.
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Salinity correction When measuring the concentration of solutions with a salt content of more than
1 g/l, a salinity correction is required. For this, you have to measure and input
the salinity of the measured medium first. When the salinity correction is
switched on, the [SAL] indicator is displayed in the measuring window.
1. Connect the D.O. sensor to the meter.
The D.O. measuring screen is displayed.
D.O. measurements can be carried out with the CellOx 325 or
DurOx 325 D.O. sensor.
The measuring instrument automatically recognizes the type of the
connected D.O. sensor.
2. If necessary, select the measured parameter with <M>.
3. Immerse the D.O. sensor in the test sample.
4. If necessary, select the measured parameter with <M>.
-D.O. concentration [mg/l]
-D.O. saturation [%]
-D.O. partial pressure [mbar].
O
2
7.92
mg/l
25.1
°C
[CellOx]
USB output
01.07.2011
08:00
You can switch the salinity correction on or off and enter the salinity
in the menu for calibration and measurement settings (see section
10.1.6 SETTINGS FOR D.O. SENSORS, page 68).
Dissolved oxygen Multi 3320
48 ba77053d01 02/2014
Stability control
(AutoRead)
& HOLD function
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
The measured parameter flashes on the display
-as soon as the measured value is outside the stability range
-when the automatic Stability control is switched off.
You can activate or switch off the automatic Stability control function (see
section 10.1.6 SETTINGS FOR D.O. SENSORS, page 68).
Criteria for a stable
measured value
The Stability control function checks whether the measured values are stable
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
The HOLD function is active.
You can terminate the Stability control function and the HOLD func-
tion with <AR> or <M> at any time.
2. Using <ENTER>, activate the Stability control function manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the display of
the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable mea-
sured value is recognized. The progress bar disappears and the display
of the measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the Stability control function manu-
ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3. Using <ENTER>, start a further measurement with stability control.
or
Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back to the
previous indication.
Multi 3320 Dissolved oxygen
ba77053d01 02/2014 49
within the monitored time interval.
The minimum duration until a measured value is assessed as stable is the mon-
itored time interval. The actual duration is mostly longer.
8.1.2 Measuring the temperature
For reproducible D.O. measurements, it is essential to measure the tempera-
ture of the test sample.
The temperature is automatically measured by the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.
Measured variable Time interval Stability in the time
interval
D.O. concentration 20 seconds Δ : better then 0.05 mg/l
Oxygen saturation 20 seconds Δ : better than 0.6 %
D.O. partial pressure 20 seconds Δ : better than 1.2 mbar
Temperature 15 seconds Δ : better than 0.5 °C
The CellOx 325 and DurOx 325 D.O. sensors have an integrated
temperature sensor.
Dissolved oxygen Multi 3320
50 ba77053d01 02/2014
8.2 Calibration
8.2.1 Why calibrate?
D.O. sensors age. This changes the slope of the D.O. sensor. Calibration deter-
mines the current slope of the sensor and stores this value in the instrument.
8.2.2 When to calibrate?
-After connecting a sensor
-Routinely within the framework of the company quality assurance
-When the calibration interval has expired
8.2.3 Calibration procedures
The Multi 3320 provides 2 calibration procedures:
-Calibration in water vapor-saturated air.
Use an OxiCal® air calibration vessel for calibration.
-Calibration via a comparison measurement (e.g. Winkler titration according
to DIN EN 25813 or ISO 5813). At the same time, the relative slope is
adapted to the comparison measurement by a correction factor. When the
correction factor is active, the [Factor] indicator appears in the measuring
window.
8.2.4 Calibration in water vapor-saturated air (air calibration vessel)
For this calibration procedure, the Comparison meas. setting must be set to Off
in the Calibration menu.
Proceed as follows to calibrate the instrument:
1. Connect the D.O. sensor to the meter.
2. Put the D.O. sensor into the air calibration vessel.
The sponge in the air calibration vessel must be moist (not wet).
Leave the sensor in the air calibration vessel for a time long enough
to adjust.
3. Start the calibration with <CAL>.
The last calibration data (relative slope) is displayed.
Multi 3320 Dissolved oxygen
ba77053d01 02/2014 51
8.2.5 Calibrating with a Comparison meas. (OxiComp)
For this calibration procedure, the Comparison meas. setting must be set to On
in the Calibration menu.
4. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. A progress bar is displayed and
the display of the measured parameter flashes.
5. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration record is displayed and output to the interface.
6. Using <F1>/[Continue] or <ENTER>, switch to the measured value dis-
play.
The meter displays a D.O. saturation of approx. 101.7 % in the air cali-
bration vessel.
Before calibrating via a comparison measurement, the sensor
should be calibrated in the air calibration vessel.
1. Connect the D.O. sensor to the meter.
2. Immerse the D.O. sensor in the reference solution.
3. Start the calibration with <CAL>.
O
2
0.88
25.1
°C
OxiCal
01.07.2011
08:00
O
2
7.92 mg/l
25.1
°C
OxiComp
01.07.2011
08:00
Dissolved oxygen Multi 3320
52 ba77053d01 02/2014
4. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter
flashes.
5. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The factor that was set last is displayed.
6. Using <><>, set the correction factor to adjust the displayed con-
centration value to the nominal value (value of the comparison mea-
surement). Subsequently, accept the correction factor with <ENTER>.
The meter switches to the measured value display.
The status display [Factor] is active.
O
2
7.92 mg/l
0.973
OxiComp
01.07.2011
08:00
Multi 3320 Dissolved oxygen
ba77053d01 02/2014 53
8.2.6 Calibration data
Displaying the cali-
bration data
The calibration record of the last calibration is to be found under the menu item,
<ENTER> / Calibration / Calibration record. To open it, press the <CAL__> key
in the measured value display.
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>[USB output] key.
Displaying the cali-
bration data storage
The calibration records of the last calibrations (up to 10) are available in the
menu, <ENTER> / Calibration / Calibration data storage and in the menu,
<ENTER> / Storage & config/Data storage / Calibration data storage.
Calibration evalua-
tion
After calibration, the meter automatically evaluates the current status of the
calibration. The evaluation appears on the display and in the calibration record.
The calibration record is automatically transmitted to the interface
after calibrating.
Menu item Setting/func-
tion
Description
Calibration /
Calibration data stor-
age /Display
or
Data storage /
Calibration data stor-
age /Display
- Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the mea-
sured value display with <M>.
Calibration /
Calibration data stor-
age /
Output to USB
or
Data storage /
Calibration data stor-
age / Output to USB
- Outputs the calibration records to
the interface.
Dissolved oxygen Multi 3320
54 ba77053d01 02/2014
Calibration record
(example)
Calibration datasets The Multi 3320 administrates two sets of calibration data:
Sensors of different types can be calibrated separately from each other. When
one sensor type is calibrated, the calibration data of the other type remains
stored. The Multi 3320 recognizes the type of the connected sensor and auto-
matically uses the correct calibration data.
Display Calibration
record
Relative slope
+++ S = 0.8 ... 1.25
++ S = 0.7 ... 0.8
+ S = 0.6 ... 0.7
Error Error S < 0.6 or S > 1.25
Error elimination (see section 11
WHAT TO DO IF..., page 48)
Multi 3320
Ser. no. 11292113
CALIBRATION CellOx
01.07.2011 16:13:33
S = 0.88 25.0 °C
Sensor +++
-Set 1 for the type, "CellOx": – CellOx 325
-Set 2 for the type, "DurOx": – DurOx 325
Multi 3320 Conductivity
ba77053d01 02/2014 55
9 Conductivity
9.1 Measuring
9.1.1 Measuring the conductivity
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
1. Connect the conductivity measuring cell to the measuring instrument.
The conductivity measuring screen is displayed.
2. If necessary, select the measured parameter with <M>.
3. Check the Measuring cell settings and cell constant for the connected
conductivity measuring cell.
If necessary, correct the settings.
The selection of the measuring cell and the setting of the cell con-
stant is done in the measurement settings menu for conductivity
(see section 10.1.8 SETTINGS FOR CONDUCTIVITY MEASURING CELLS,
page 70). The cell constant to be set must either be taken from the
operating manual of the measuring cell or is printed on the measur-
ing cell.
4. Immerse the conductivity measuring cell in the test sample.
5. If necessary, select the measured parameter with <M>.
-Conductivity [µS/cm] / [mS/cm]
-Resistivity [Ω·cm] / [kΩ·cm] / [MΩ·cm]
-Salinity SaL [ ]
-Total dissolved solids TDS [mg/l] / [g/l]
ϰ1417µS/cm
25.0
°C
[Tr25][nLF][ 0.479 1/cm]
USB output
01.07.2011
08:00
Conductivity Multi 3320
56 ba77053d01 02/2014
Stability control
(AutoRead)
& HOLD function
The stability control function (AutoRead) continually checks the stability of the
measurement signal. The stability has a considerable impact on the reproduc-
ibility of measured values.
The display of the measured parameter flashes.
-as soon as the measured value is outside the stability range.
-when the automatic Stability control is switched off.
You can activate or switch off the automatic Stability control function (see
section 10.1.8 SETTINGS FOR CONDUCTIVITY MEASURING CELLS, page 70).
Criteria for a stable
measured value
The Stability control function checks whether the measured values are stable
The factor to calculate the total dissolved solids is set to 1.00 in the
factory. You can adjust this factor to meet your requirements in the
range 0.40 ... 1.00. The factor is set in the Measurement menu for
the parameter, TDS.
1. Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
The HOLD function is active.
You can terminate the Stability control function and the HOLD func-
tion with <AR> or <M> at any time.
2. Using <ENTER>, activate the Stability control function manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. A progress bar is displayed and the display of
the measured parameter flashes.
The [HOLD][AR] status indicator appears as soon as a stable mea-
sured value is recognized. The progress bar disappears and the display
of the measured parameter stops flashing.
The current measurement data is output to the interface. Measurement
data meeting the stability control criterion is marked by AR.
You can prematurely terminate the Stability control function manu-
ally with <ENTER> at any time. If the Stability control function is
prematurely terminated, the current measurement data are output
to the interface without the AutoRead info.
3. Using <ENTER>, start a further measurement with stability control.
or
Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back to the
previous indication.
Multi 3320 Conductivity
ba77053d01 02/2014 57
within the monitored time interval.
The minimum duration until a measured value is assessed as stable is the mon-
itored time interval. The actual duration is mostly longer.
9.1.2 Measuring the temperature
For reproducible conductivity measurements, it is essential to measure the
temperature of the test sample.
The temperature is automatically measured by the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.
9.2 Calibration
9.2.1 Why calibrate?
Aging slightly changes the cell constant, e.g. due to coatings. As a result, an
inexact measured value is displayed. The original characteristics of the cell can
often be restored by cleaning the cell. Calibration determines the current value
of the cell constant and stores this value in the meter.
Thus, you should calibrate at regular intervals (we recommend: every 6
months).
9.2.2 When to calibrate?
-After connecting a sensor
-Routinely within the framework of the company quality assurance
-When the cleaning interval has expired
9.2.3 Determining the cell constant (calibration in control standard)
You can determine the actual cell constant of the conductivity measuring cell
by calibrating with the control standard in the following ranges:
- 0.450 ... 0.500 cm-1
(e.g. TetraCon 325 with a nominal cell constant of 0.475-1)
- 0.800 ... 0.880 cm-1
Measured vari-
able
Time interval Stability in the time inter-
val
Conductivity ϰ10 seconds Δ : better than
1.0 % of mesured value
Temperature 15 seconds Δ : better than 0.5 °C
The TetraCon 325, KLE 325, LR 325/01 and LR 325/001 conduc-
tivity sensors have an integrated temperature sensor.
Conductivity Multi 3320
58 ba77053d01 02/2014
(e.g. KLE 325 with a nominal cell constant of 0.840-1)
The cell constant is determined in the control standard, 0.01 mol/l KCl. Cell
constants outside the ranges quoted above cannot be calibrated.
In the delivery condition, the calibrated cell constant of the meter is set to 0.475
cm-1 (conductivity measuring cell, TetraCon 325).
For this calibration procedure, the Measuring cell setting must be set to cal in
the Measurement menu. Proceed as follows to determine the cell constant:
9.2.4 Calibration data
Displaying the cali-
bration data
The calibration record of the last calibration is to be found under the menu item,
<ENTER> / Calibration / Calibration record. To open it, press the <CAL__> key
in the measured value display.
1. Connect the conductivity measuring cell to the measuring instrument.
2. In the measured value display, select the conductivity parameter with
<M>.
3. Start the calibration with <CAL>.
The cell constant that was calibrated last is displayed.
4. Immerse the conductivity measuring cell in the control standard solu-
tion, 0.01 mol/l KCI.
5. Start the measurement with <ENTER>.
The [AR] status indicator is displayed. A progress bar is displayed and
the display of the measured parameter flashes.
6. Wait for the end of the measurement with stability control or accept the
calibration value with <ENTER>.
The calibration record is displayed and output to the interface.
7. Using <F1>/[Continue] or <ENTER>, switch to the measured value
display.
The calibration record is automatically transmitted to the interface
after calibrating.
ϰ0.479 1/cm
25.1 °C
[Tr25][nLF][ 0.479 1/cm]
01.07.2011
08:00
Multi 3320 Conductivity
ba77053d01 02/2014 59
Subsequently, you can transmit the displayed calibration data to the interface,
e.g. to a PC, with the <F2>[USB output] key.
Displaying the cali-
bration data storage
The calibration records of the last calibrations (up to 10) are available in the
menu, <ENTER> / Calibration / Calibration data storage and in the menu,
<ENTER> / Storage & config/Data storage / Calibration data storage.
Calibration evalua-
tion
After calibration, the meter automatically evaluates the current status of the cal-
ibration. The evaluation appears on the display and in the calibration record.
Menu item Setting/func-
tion
Description
Calibration /
Calibration data stor-
age /Display
or
Data storage /
Calibration data stor-
age /Display
- Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibra-
tion record to the interface with
<F2>/[USB output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the mea-
sured value display with <M>.
Calibration /
Calibration data stor-
age /
Output to USB
or
Data storage /
Calibration data stor-
age / Output to USB
- Outputs the calibration records to
the interface.
Display Calibration
record
Cell constant [cm-1]
+++ within the ranges
0.450 ... 0.500 cm-1
or
0.800 ... 0.880 cm-1
Error Error outside the ranges
0.450 ... 0.500 cm-1
or
0.800 ... 0.880 cm-1
Error elimination (see section 11
WHAT TO DO IF..., page 48)
Conductivity Multi 3320
60 ba77053d01 02/2014
Calibration record
(example)
Multi 3320
Ser. no. 11292113
CALIBRATION Cond
01.07.2011 16:13:33
Cell constant 0.479 1/cm 25.0 °C
Sensor +++
Multi 3320 Settings
ba77053d01 02/2014 61
10 Settings
10.1 Measurement settings
10.1.1 Settings for pH measurements
The settings for pH measurements are made in the menu for calibration and
measurement settings of the pH/ORP measurement. To open the settings, dis-
play the required measured parameter in the measured value display and
press the <ENTER> key. After completing the settings, switch to the measured
value display with <M>.
In the following table, only those settings are listed that concern the pH mea-
surement.
Default settings are printed in bold.
Menu item Possible set-
ting
Description
Calibration / Cali-
bration record
-Displays the calibration record of
the last calibration.
Calibration / Cali-
bration data stor-
age /Display
-Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibration
record to the interface with
<F2>/[USB output].
-Output all calibration records to
the interface with <F2__>[USB
output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the measured
value display with <M>.
Calibration / Cali-
bration data stor-
age / Output to USB
-Outputs the calibration records to
the interface.
Calibration /Buffer TEC
NIST/DIN
ConCal
...
Buffer sets to be used for pH cali-
bration (see section 5.2 CALIBRA-
TION, page 25).
Calibration /One
point calibration
Yes
No
Quick calibration with 1 buffer
Calibration /Cali-
bration interval
1 ... 7 ... 999 d Calibration interval for the pH elec-
trode (in days).
The meter reminds you to calibrate
regularly by the flashing sensor
symbol in the measuring screen.
Settings Multi 3320
62 ba77053d01 02/2014
10.1.2 Buffer sets for calibration
You can use the buffer sets quoted in the table for an automatic calibration. The
pH values are valid for the specified temperature values. The temperature
dependence of the pH values is taken into consideration during the calibration.
Calibration /Unit for
slope
mV/pH
%
Unit of the slope.
The % display refers to the Nernst
slope of -59.2 mV/pH (100 x deter-
mined slope/Nernst slope).
Alternative temper-
ature
On
Off
Takes the temperature value from
the 2nd sensor.
Man. temperature -25 ... +25 ...
+130 °C
Entry of the manually determined
temperature. For measurements
without temperature sensor only.
Resolution pH 0.001
0.01
0.1
Resolution of the pH display
Reset - Resets all sensor settings to the
delivery condition (see section
10.3.1 RESETTING THE MEASURE-
MENT SETTINGS, page 75).
No. Buffer set * pH values at
1ConCal Any Any
2NIST/DIN
DIN buffers according to DIN 19266
and NIST Traceable Buffers
1.679
4.006
6.865
9.180
12.454
25 °C
3TEC
WTW Technical buffers
2.000
4.010
7.000
10.011
25 °C
4Merck 1* 4.000
7.000
9.000
20°C
5Merck 2 * 1.000
6.000
8.000
13.000
20°C
Menu item Possible set-
ting
Description
Multi 3320 Settings
ba77053d01 02/2014 63
6Merck 3 * 4.660
6.880
9.220
20°C
7Merck 4 * 2.000
4.000
7.000
10.000
20°C
8Merck 5 * 4.010
7.000
10.000
25 °C
9DIN 19267 1.090
4.650
6.790
9.230
25 °C
10 Mettler Toledo USA * 1.679
4.003
7.002
10.013
25 °C
11 Mettler Toledo EU * 1.995
4.005
7.002
9.208
25 °C
12 Fisher * 2.007
4.002
7.004
10.002
25 °C
13 Fluka BS * 4.006
6.984
8.957
25 °C
14 Radiometer * 1.678
4.005
7.000
9.180
25 °C
15 Baker * 4.006
6.991
10.008
25 °C
16 Metrohm * 3.996
7.003
8.999
25 °C
17 Beckman * 4.005
7.005
10.013
25 °C
18 Hamilton Duracal * 4.005
7.002
10.013
25 °C
No. Buffer set * pH values at
Settings Multi 3320
64 ba77053d01 02/2014
Brand names or trade names are trademarks of their respective owners protected
by law.
10.1.3 Calibration interval
The calibration evaluation is displayed as a sensor symbol.
The sensor symbol flashes after the adjusted calibration interval has expired. It
is still possible to measure.
19 Precisa * 3.996
7.003
8.999
25 °C
20 Reagecon TEC * 2.000
4.010
7.000
10.000
25 °C
21 Reagecon 20 * 2.000
4.000
7.000
10.000
13.000
20°C
22 Reagecon 25 * 2.000
4.000
7.000
10.000
13.000
25 °C
23 Chemsolute *2.000
4.000
7.000
10.000
20°C
24 USABlueBook *4.000
7.000
10.000
25 °C
25 YSI * 4.000
7.000
10.000
25 °C
No. Buffer set * pH values at
The buffers are selected in the menu, pH / <ENTER> / Calibration
/ Buffer (see 10.1.1 SETTINGS FOR PH MEASUREMENTS, PAGE 61).
To ensure the high measuring accuracy of the measuring system,
calibrate after the calibration interval has expired.
Multi 3320 Settings
ba77053d01 02/2014 65
Setting the calibra-
tion interval
The calibration interval is set to 7 days in the factory.
You can change the interval (1 ... 999 days):
10.1.4 Settings for ORP measurements
The settings for ORP measurements are made in the menu for calibration and
measurement settings of the pH/ORP measurement. To open the settings, dis-
play the required measured parameter in the measured value display and
press the <ENTER> key. After completing the settings, switch to the measured
value display with <M>.
In the following table, only those settings are listed that influence the ORP mea-
surement.
Default settings are printed in bold.
1. Using <ENTER>, open the menu for the measurement settings.
2. In the Calibration / Calibration interval menu, set the calibration interval
with <><>.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.
Menu item Possible
setting
Description
Man. temperature -25 ... +25 ...
+130 °C
Entry of the manually determined
temperature. For measurements
without temperature sensor only.
Resolution mV 0.1
1
Resolution of the mV display
Reset - Resets all sensor settings to the
delivery condition (see section
10.3.1 RESETTING THE MEASURE-
MENT SETTINGS, page 75).
Settings Multi 3320
66 ba77053d01 02/2014
10.1.5 Settings for ISE measurements
The settings for ISE measurements are made in the menu for calibration and
measurement settings of the ISE measurement.
To open the settings, display the required measured parameter in the mea-
sured value display and press the <ENTER> key. After completing the settings,
switch to the measured value display with <M>.
In the following table, only those settings are listed that influence the ISE mea-
surement:
Menu item Possible setting Description
Calibration / Cali-
bration record
-Displays the calibration
record of the last calibra-
tion.
Calibration / Cali-
bration data stor-
age / Display
-Displays the calibration
record.
Further options:
-Scroll through the cali-
bration records with
<><>.
-Output the displayed
calibration record to the
interface with <F2>/
[USB output].
-Output all calibration
records to the interface
with <F2__>[USB out-
put].
-Quit the display with
<F1>/[Back] or
<ENTER>.
-Switch directly to the
measured value display
with <M>.
Calibration / Cali-
bration data stor-
age / Output to USB
-Outputs the calibration
records to the interface.
Man. temperature -25 ... +25 ... +130 °C Entry of the manually
determined temperature.
For measurements without
temperature sensor only.
ISE setup /
AutoRead criterion
low
medium
high
Selection of the AutoRead
criteria (see section 7.1.1
MEASURING THE ION CON-
CENTRATION, page 39).
Multi 3320 Settings
ba77053d01 02/2014 67
ISE setup /
Ion type
Ag, Br, Ca, Cd, Cl,
CN, Cu, F, I, K, Na,
NO3, Pb, S, NH3,
NH4, CO2, ION
Selection of the ion type to
be measured.
An ion that is not included
in the list can be measured
with the setting, ION.
* Measuring with the NH 500 electrode:
The NH4 setting is not suitable for the gas-sensi-
tive electrode NH 500.
Select the following settings:
Ion type "ION", Valency "-1".
ISE setup /
Unit
mg/l
µmol/l
mg/kg
ppm
%
Selection, with which unit
the measurement result
and calibration standards
should be displayed.
ISE setup /
Ion type/ION
Valency
Molar mass
Set the valence (Valency)
and molar weight (Molar
mass) for the ion.
ISE setup /
Density
0.001 ... 9.999 g/ml
or kg/l
Adjustable density of the
test sample (only with Unit:
mg/kg, ppm, %)
Menu item Possible setting Description
Settings Multi 3320
68 ba77053d01 02/2014
10.1.6 Settings for D.O. sensors
The settings are available in the menu for measurement and calibration set-
tings. To open the settings, display the required measured parameter in the
measured value display and press the <ENTER> key. After completing the set-
tings, switch to the measured value display with <M>.
Default settings are printed in bold.
Menu item Possible
setting
Description
Calibration /Calibra-
tion record
-Displays the calibration record of
the last calibration.
Calibration / Cali-
bration data storage
/Display
-Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibration
record to the interface with <F2>/
[USB output].
-Output all calibration records to
the interface with <F2__>[USB
output].
-Quit the display with <F1>/
[Back] or <ENTER>.
-Switch directly to the measured
value display with <M>.
Calibration / Cali-
bration data storage
/ Output to USB
-Outputs the calibration records to
the interface.
Calibration /Calibra-
tion interval
1 ... 14 ...
999 d
Calibration interval for the D.O. sen-
sor (in days).
The meter reminds you to calibrate
regularly by the flashing sensor
symbol in the measuring screen.
Calibration /Com-
parison meas.
On
Off
Enables to adjust the measured
value with the aid of a comparison
measurement, e.g. Winkler titration.
For details, see section 8.2 CALIB-
RATION, page 50.
Multi 3320 Settings
ba77053d01 02/2014 69
10.1.7 Calibration interval
The calibration evaluation is displayed as a sensor symbol.
The sensor symbol flashes after the adjusted calibration interval has expired. It
is still possible to measure.
Setting the calibra-
tion interval
The calibration interval is set to 14 days in the factory.
You can change the interval (1 ... 999 days):
Sal correction On
Off
Manual salt content correction for
concentration measurements.
Salinity 0.0 ... 70.0 Salinity or salinity equivalent for the
salt content correction.
This function is only available for
concentration measurements if the
manual salt content correction is
switched on.
Reset - Resets all sensor settings to the
delivery condition (see section
10.3.1 RESETTING THE MEASURE-
MENT SETTINGS, page 75).
To ensure the high measuring accuracy of the measuring system,
calibrate after the calibration interval has expired.
Menu item Possible
setting
Description
1. Open the menu for measurement settings with <ENTER>.
2. In the Calibration / Calibration interval menu, set the calibration interval
with <><>.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.
Settings Multi 3320
70 ba77053d01 02/2014
10.1.8 Settings for conductivity measuring cells
The settings are made in the Measurement menu for the measured parameter,
conductivity. To open the settings, display the required measured parameter in
the measured value display and press the <ENTER> key. After completing the
settings, switch to the measured value display with <M>.
Default settings are printed in bold.
Menu item Possible
setting
Description
Calibration /Cali-
bration record
-Displays the calibration record of the
last calibration.
Calibration / Cali-
bration data stor-
age /Display
-Displays the calibration record.
Further options:
-Scroll through the calibration
records with <><>.
-Output the displayed calibration
record to the interface with <F2>/
[USB output].
-Output all calibration records to the
interface with <F2__>[USB out-
put].
-Quit the display with <F1>/[Back]
or <ENTER>.
-Switch directly to the measured
value display with <M>.
Calibration / Cali-
bration data stor-
age / Output to
USB
-Outputs the calibration records to the
interface.
Calibration /Cali-
bration interval
1 ... 150 ...
999 d
Calibration interval for the measuring
cell (in days).
The meter reminds you to calibrate
regularly by the flashing sensor sym-
bol in the measuring screen.
Multi 3320 Settings
ba77053d01 02/2014 71
Measurement /
Measuring cell /
Type
Measuring cell used
Cal Measuring cells whose cell constant
is determined by calibration in the
KCL control standard solution.
Calibration ranges:
0.450 ... 0.500 cm-1 and
0.800 ... 0.880 cm-1
The currently valid cell constant is
displayed in the status line.
LR325/01 LR 325/01 measuring cell,
nominal cell constant
0.100 cm-1.
The cell constant can be adjusted in
the range 0.090 ... 0.110 cm-1.
LR325/001 LR 325/001 measuring cell,
nominal cell constant
0.010 cm-1.
The cell constant is permanently set.
man Any measuring cells with freely
adjustable cell constants in the range
0.250 ... 25.000 cm-1.
Measurement /
Measuring cell /
Cell const. man
0.250 ...
0.475
25.000 cm-1
Display and setting option of the cell
constant of any measuring cells
(man).
Measurement /
Measuring cell /
Cell const. LR325/
01
0.090 ...
0.100 ...
0.110 cm-1
Display and setting option of the cell
constant of the LR 325/01 measuring
cell.
Measurement /
Temp. comp. (TC)
/Method
nLF
Lin
Off
Procedure for temperature compen-
sation (see section 10.1.10 TEMPERA-
TURE COMPENSATION, page 72).
This setting is only available for the
measured parameters, ϰ and ρ.
Measurement /
Temp. comp. (TC)
/ Linear coeff.
0.000 ...
2.000 ...
10.000 %/K
Coefficient of the linear temperature
compensation.
This setting is only available when the
linear temperature compensation is
set.
Menu item Possible
setting
Description
Settings Multi 3320
72 ba77053d01 02/2014
10.1.9 Calibration interval
The calibration evaluation is displayed as a sensor symbol.
The sensor symbol flashes after the adjusted calibration interval has expired. It
is still possible to measure.
Setting the calibra-
tion interval
The calibration interval is set to 150 days in the factory.
You can change the interval (1 ... 999 days):
10.1.10 Temperature compensation
The calculation of the temperature compensation is based on the preset refer-
ence temperature, 20 °C or 25 °C. It appears on the display as Tr20 or Tr25.
You can select one of the following temperature compensation methods:
-Nonlinear temperature compensation (nLF) according to EN 27 888
-Linear temperature compensation (lin) with adjustable coefficient in the
range 0.000 ... 10.000 %/K
-No temperature compensation (off)
Measurement /
Temp. comp. (TC)
/ Reference temp.
20 °C
25 °C
Reference temperature
This setting is only available for the
measured parameters, ϰ and ρ.
Measurement /
TDS factor
0.40 ... 1.00 Factor for TDS value
Reset - Resets all sensor settings to the deliv-
ery condition (see section 10.3.1
RESETTING THE MEASUREMENT SET-
TINGS, page 75).
To ensure the high measuring accuracy of the measuring system,
calibrate after the calibration interval has expired.
Menu item Possible
setting
Description
1. Open the menu for measurement settings with <ENTER>.
2. In the Calibration / Calibration interval menu, set the calibration interval
with <><>.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.
Multi 3320 Settings
ba77053d01 02/2014 73
Application tips Set the temperature compensation suitable for your test sample:
10.1.11 Setting the TDS factor
The factor to calculate the total dissolved solids is set to 1.00 in the delivery
condition.
You can adjust this factor to meet your requirements in the range 0.40 ... 1.00.
The factor is set in the menu for the parameter TDS (Measurement / TDS fac-
tor).
The reference temperature and temperature compensation are set
in the Measurement menu for the parameter, conductivity (see sec-
tion 10.1.8 SETTINGS FOR CONDUCTIVITY MEASURING CELLS, page
70).
Test sample Temperature compensation Display
Natural water
(ground water, surface
water, drinking water)
nLF
according to EN 27 888
nLF
Ultrapure water nLF
according to EN 27 888
nLF
Other aqueous solutions Lin Set linear
temperature coefficient
0.000 ... 10.000 %/K
Lin
Salinity (seawater) Automatic nLF according to
IOT (International Oceano-
graphic Tables)
Sal, nLF
Settings Multi 3320
74 ba77053d01 02/2014
10.2 Sensor-independent settings
10.2.1 System
To open the Storage & config menu in the measured value display, press the
<ENTER__> key. After completing the settings, switch to the measured value
display with <M>.
Default settings are printed in bold.
Menu item Possible set-
ting
Description
System / General /
Language
Deutsch
English
(further)
Selects the menu language
System / General /
Beep
On
Off
Switch on/off the beep on key-
stroke
System / General / Illu-
mination
Auto
On
Off
Switches the display illumina-
tion on/off
System / General /
Contrast
0 ... 50 ... 100
%
Changes the display contrast
System / General /
Switchoff time
10 min ... 1h
... 24 h
Adjusts the switch-off time
System / General /
Temperature unit
°C
°F
Temperature unit, degrees Cel-
sius or degrees Fahrenheit.
All temperature values are dis-
played with the selected unit.
System / General /
Stability control
On
Off
Switches on or off the auto-
matic stability control during
measurement
System / Interface /
Baud rate
1200, 2400,
4800, 9600,
19200
Baud rate of the data interface
System / Interface /
Output format
ASCII
CSV
Output format for data trans-
mission (see section 12 TRANS-
MITTING DATA (USB INTERFACE),
page 84)
System / Interface /
Decimal separator
Dot (xx.x)
Comma (xx,x)
Decimal separator
System / Interface /
Output header
Output of a header for Output
format: CSV
Multi 3320 Settings
ba77053d01 02/2014 75
10.2.2 Data storage
This menu contains all functions to display, edit and erase stored measured
values and calibration records (see section 11 DATA STORAGE, page 78).
10.3 Reset
You can reset (initialize) all sensor settings and sensor-independent settings
separately from each other.
10.3.1 Resetting the measurement settings
The following settings for pH measurements are reset to the default settings
with the Reset function:
pH
System /Clock Date format
Datum
Time
Time and date settings (see
section 4.4.6 EXAMPLE 2 ON
NAVIGATION: SETTING THE DATE
AND TIME, page 19)
System /Service infor-
mation
Hardware version and software
version of the meter are dis-
played.
System /Reset - Resets the system settings to
the delivery condition (see sec-
tion 10.3.2 RESETTING THE SYS-
TEM SETTINGS, page 77).
The calibration data are reset to the default settings together with
the measuring parameters. Recalibrate after performing a reset.
Menu item Possible set-
ting
Description
Setting Default settings
Buffer TEC
Calibration interval 7 d
Unit for slope mV/pH
Measured parameter pH
Resolution pH 0.001
Resolution mV 0.1
Asymmetry 0 mV
Settings Multi 3320
76 ba77053d01 02/2014
The sensor settings are reset under the Reset menu item in the menu for cali-
bration and measurement settings. To open it in the measured value display,
press the <ENTER> (or <F1>/[Menu]) key.
Oxi
The following settings for D.O. measurements are reset to the default settings
with the Reset function:
The sensor settings are reset under the Reset menu item in the menu for cali-
bration and measurement settings. To open it in the measured value display,
press the <ENTER> (or <F1>/[Menu]) key.
Cond The following settings for conductivity measurements are reset to the default
settings with the Reset function:
Slope -59.2 mV
Man. temperature 25 °C
One point calibration No
Setting Default settings
The calibration data are reset to the default settings together with
the measuring parameters. Recalibrate after performing a reset.
Setting Default settings
Kal.-Intervall 14 d
Comparison meas. Off
Measured parameter D.O. concentration
Relative slope (SRel)1.00
Salinity (value) 0.0
Salinity (function) Off
Setting Default settings
Kal.-Intervall 150 d
Measured parameter ϰ
Cell constant (C)
(calibrated)
0.475 cm-1 or 0.840 cm-1
(nominal cell constant of the conduc-
tivity measuring cell last calibrated)
Cell constant (C)
(set)
0.475 cm-1
Temperature compensation nLF
Multi 3320 Settings
ba77053d01 02/2014 77
The sensor settings are reset under the Reset menu item in the menu for cali-
bration and measurement settings. To open it in the measured value display,
press the <ENTER> (or <F1>/[Menu]) key.
10.3.2 Resetting the system settings
The following system settings can be reset to the default condition:
The system settings are reset in the menu, Storage & config / System / Reset.
To open the Storage & config menu in the measured value display, press the
<ENTER__> (or <F1__>/[Menu]) key.
Reference temperature 25 °C
Temperature coefficient (TC) of the
linear temperature compensation
2.000 %/K
TDS factor 1.00
Setting Default settings
Language English
Beep On
Baud rate 4800 Baud
Output format ASCII
Decimal separator Dot (xx.x)
Contrast 50 %
Illumination Auto
Switchoff time 1 h
Stability control On
Temperature unit °C
Setting Default settings
Data storage Multi 3320
78 ba77053d01 02/2014
11 Data storage
You can transmit measured values (datasets) to the data storage:
-Manual data storage (see section 11.1 MANUAL STORAGE, page 78)
-Automatic storage at intervals (see section 11.2 AUTOMATIC DATA STORAGE
AT INTERVALS, page 79)
11.1 Manual storage
You can transmit a measurement dataset to the data storage as follows.
Bei jedem Speichervorgang werden die aktuellen Datensätze der im Display
angezeigten Sensoren gleichzeitig auf die Schnittstelle übertragen.
With each data storage process, the current datasets of the sen-
sors indicated on the display are transmitted to the interface at the
same time.
1. Press the <STO> key shortly.
The menu for manual data storage appears.
2. If necessary, change and confirm the ID number (1 ... 10000) with
<><> and <ENTER>.
The dataset is stored. The meter switches to the measured value dis-
play.
15.02.2014 11:24:16
pH 7.000 24.8 °C AR +++
O2 7.80 mg/l 24.8 °C AR +++
ID number: 1
Continue
Manual data storage 4 von 500
15.02.2014
14:15
Back USB output
Multi 3320 Data storage
ba77053d01 02/2014 79
If the storage is full The following window appears if all 500 storage locations are occupied:
You have the following options:
-To erase the entire storage, confirm Yes.
-To cancel the storage process and switch to the measured value display,
confirm No. Then you can e.g. transmit the stored data to a PC (see section
11.3.1 EDITING THE MEASURED VALUE STORAGE, page 81) and subsequently
erase the data storage (see section 11.3.2 ERASING THE MEASUREMENT DATA
STORAGE, page 83).
11.2 Automatic data storage at intervals
The storage interval (Interval) determines the time interval between automatic
data storage processes. With each data storage process, the current datasets
of the sensors indicated on the display are transmitted to the interface at the
same time.
Configuring the
automatic storage
function
Data storage full. Erase?
Yes
No
Warning
15.02.2014
14:15
Back
1. Press the <STO__> key.
The menu for automatic data storage appears.
1 Adjusted entire storage duration
2 Max. available storage duration
3 Graphical display of the storage usage
1
ID number 1
Interval 30 s
Duration 180 min
Continue
0d03h00min
0 1d17h33min
Automatic data storage
15.02.2014
14:15
2
3
Back
Data storage Multi 3320
80 ba77053d01 02/2014
Settings You can configure the automatic data storage function with the following
settings:
Starting the auto-
matic storage func-
tion
To start the automatic storage function, select Continue with <><> and
confirm with <ENTER>. The meter switches to the measured value display.
The active automatic storage function can be recognized by the progress bar
in the function display. The progress bar indicates the remaining storage dura-
tion.
Energy saving mode
([Eco mode])
If the automatic storing function is active, the meter provides an energy saving
mode ([Eco mode]) to avoid unnecessary energy consumption. The energy
Menu item Possible set-
ting
Description
ID number 1 ... 10000 ID number for the dataset series.
Interval 1 s, 5 s, 10 s,
30 s, 1 min,
5min,
10 min,
15 min,
30 min,
60 min
Storage interval.
The lower limit of the storage
interval can be restricted by the
number of free storage locations.
The upper limit is restricted by the
storage duration.
Duration 1 min ... x min Storage duration.
Specifies after which time the
automatic data storage should be
terminated.
The lower limit of the storage
duration is restricted by the stor-
age interval.
The upper limit is restricted by the
number of free storage locations.
1 Remaining storage duration
2 Graphical display of the storage duration
If the automatic storage function is activated, only the following
keys are active: Softkeys, <M>, <STO__> and <On/Off>. The
other keys and the automatic switch-off function are deactivated.
1
2
pH
6.949
25.0
°C
0d03h00min
15.02.2014
14:15
014
Eco mode
Multi 3320 Data storage
ba77053d01 02/2014 81
saving mode switches off functions of the meter that are not required for the
automatic storage of measurement data (such as the display). By pressing any
key the energy saving mode is switched off again.
Terminating the
automatic storage
function prema-
turely
Proceed as follows to switch off the automatic data storage function before the
adjusted storage duration has expired:
11.3 Measurement data storage
11.3.1 Editing the measured value storage
The contents of the manual or automatic measurement data storage can be
shown on the display and output to the interface.
Each of the measurement data storages has a function to erase the entire
contents.
Editing the data
storage
The storage is edited in the menu, Storage & config/ Data storage. To open the
Storage & config menu in the measured value display, press the <ENTER__>
key.
Open the manual or automatic storage directly with the <RCL> or <RCL__>
key.
1. Press the <STO__> key.
The following window appears.
2. Using <><>, select Yes and confirm with <ENTER>.
The meter switches to the measured value display.
The automatic data storage function is terminated.
Stop automatic storage?
Yes
No
Warning
15.02.2014
14:15
Back
The settings are explained here using the manual data storage as
an example. The same settings and functions are available for the
automatic data storage.
Data storage Multi 3320
82 ba77053d01 02/2014
Settings
Display presentation
of a dataset
Representation of a
dataset
(USB output)
Quitting the display To quit the display of stored measurement datasets, you have the following
Menu item Setting/
function
Description
Data storage / Man-
ual data storage /
Display
- Displays all measurement datasets
page by page.
Further options:
-Scroll through the datasets with
<><>.
-Output the displayed dataset to
the interface with <F2>/[USB
output].
-Quit the display with <F1>/
[Back].
Data storage / Man-
ual data storage /
Erase
- Erases the entire manual mea-
surement data storage.
All calibration data remain stored
when this action is performed.
Data storage /
Manual data storage
/ Output to USB
- Outputs all stored measurement
data to the interface.
Manual data storage 3 of 64
15.02.2014 11:24:16 ID number: 2
pH 7.000 24.8 °C AR +++
O2 7.80 mg/l 24.8
°C AR +++
15.02.2014
14:15
Back USB output
15.02.2014 09:56:20
Multi 3320
Ser. no. 08502113
ID number 2
pH1 6.012 24.8 °C, AR, S: +++
O2 7.80 24.8 °C, AR, S: +++
________________________________________
15.02.2014 10:56:20
Multi 3320
Ser. no. 08502113
ID number 2
pH1 6.012 24.8 °C, AR, S: +++
O2 7.80 24.8 °C, AR, S: +++
Multi 3320 Data storage
ba77053d01 02/2014 83
options:
-Switch directly to the measured value display with <M>.
-Quit the display and move to the next higher menu level with <F1>/[Back].
11.3.2 Erasing the measurement data storage
Erasing the measurement data storage (see section 11.3.1 EDITING THE
MEASURED VALUE STORAGE, page 81).
11.3.3 Measurement dataset
A complete dataset includes:
-ID number
-Date/time
-Measured values of the connected sensors
-Measured temperature value of the connected sensors or manually set tem-
perature
-AutoRead info: The AR indicator appears with the measured value if the
AutoRead criterion was met while storing (stable measured value). Other-
wise, there is no AR indicator.
-Calibration evaluation: +++, ++, +, -, or no evaluation
11.3.4 Storage locations
The Multi 3320 meter has two measurement data storages. The measured
values recorded either manually or automatic are stored separately in indi-
vidual measurement data storages.
Storage Maximum number of datasets
Manual data storage 500
Automatic data storage 5000
Transmitting data (USB interface) Multi 3320
84 ba77053d01 02/2014
12 Transmitting data (USB interface)
12.1 Options for data transmission
Via the USB interface you can transmit data to a PC. The following table shows
which data are transmitted to the interface in which way:
Data Control Operation / description
Current datas-
ets of the sen-
sors indicated
on the display
Manual -With <F2>/[USB output].
-Simultaneously with every manual
data storage process (see section
11.1 MANUAL STORAGE, page 78).
Automatic, at
intervals
-With <F2__>/[USB output].
Then you can set the transmission
interval.
-Simultaneously with every auto-
matic data storage process (see
section 11.2 AUTOMATIC DATA STO-
RAGE AT INTERVALS, page 79).
Stored mea-
sured values
Manual -Displayed dataset with <F2>[USB
output] after calling up from the
storage.
-All datasets with the Output to USB
function.
(see section 11.3.1 EDITING THE
MEASURED VALUE STORAGE, page
81).
calibration
records
Manual -Calibration record with <F2>/[USB
output]
(see section 5.2.6 CALIBRATION
DATA, page 32).
automatic -At the end of a calibration proce-
dure.
The following rule applies: With the exception of the menus, shortly
pressing the <F2>[USB output] key generally outputs the display
contents to the interface (displayed measured values, measure-
ment datasets, calibration records).
Multi 3320 Transmitting data (USB interface)
ba77053d01 02/2014 85
12.2 Connecting a PC
Connect the Multi 3320 to the PC via the USB interface.
NOTE
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as the values would be incorrect.
The USB interface is not galvanically isolated.
Installation of the
USB driver on the
PC
System requirements of the PC for installation of the USB driver:
-PC with Pentium processor or higher with at least one free USB connection
and CD-ROM drive
-Windows XP, Windows 7.
12.3 MultiLab Importer
With the aid of the MultiLab Importer software, you can record and evaluate
measurement data with a PC.
1. Insert the supplied installation CD in the CD drive of your PC.
2. Install the driver from the CD.
Follow the Windows installation instructions as necessary.
3. Connect the Multi 3320 to the PC via the USB interface.
The meter is listed as a virtual COM interface among the connections in
the Windows instrument manager.
More detailed information can be found in the MultiLab Importer
operating manual.
Maintenance, cleaning, disposal Multi 3320
86 ba77053d01 02/2014
13 Maintenance, cleaning, disposal
13.1 Maintenance
13.1.1 General maintenance activities
The only maintenance activity required is replacing the batteries.
13.1.2 Replacing the batteries
See the relevant operating manuals of the electrodes for instruc-
tions on maintenance.
You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.
1Screws
2 Battery compartment
1. Unscrew the two screws (1) on the underside of the meter.
2. Open the battery compartment (2) on the underside of the meter.
3. Remove the four batteries from the battery compartment.
4. Place four new batteries (type Mignon AA) in the battery compartment.
CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly. The ± signs on the batteries must correspond to the ±
signs in the battery compartment.
2
1
Multi 3320 Maintenance, cleaning, disposal
ba77053d01 02/2014 87
13.2 Cleaning
Occasionally wipe the outside of the measuring instrument with a damp, lint-
free cloth. Disinfect the housing with isopropanol as required.
13.3 Packing
This meter is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing protects the
meter against damage during transport.
13.4 Disposal
At the end of its operational lifetime, the meter must be returned to the
disposal or return system statutory in your country. If you have any questions,
please contact your supplier.
5. Close the battery compartment (2) and tighten the screws (1).
6. Set the date and time (see section 4.4.6 EXAMPLE 2 ON NAVIGATION:
SETTING THE DATE AND TIME, page 19)
When the batteries are nearly discharged, the status indi-
cator is displayed.
Dispose of used batteries according to the local regulations of your
country.
End users within the European Union are obligated to return used
batteries
(even ecologically compatible ones) to a collection point set up for
recycling
purposes.
Batteries are marked with the crossed-out waste container
symbol. Therefore, they may not be disposed with the domestic
waste.
CAUTION
The housing is made of synthetic material (ABS). Thus, avoid
contact with acetone or similar detergents that contain sol-
vents. Remove any splashes immediately.
What to do if... Multi 3320
88 ba77053d01 02/2014
14 What to do if...
14.1 pH/ORP
Error message
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
Electrode:
– Air bubble in front of the junction – Remove air bubble
– Air in the junction – Extract air or moisten junction
– Cable broken – Replace electrode
– Gel electrolyte dried out – Replace electrode
– The measured value is outside
the measuring range of the meter
– Use suitable combination
electrode
Cause Remedy
Electrode:
– The values determined for zero
point and slope of the combina-
tion electrode are outside the
allowed limits.
– Recalibrate
– Junction contaminated – Clean junction
– Electrode broken – Replace electrode
Buffer solutions:
– Incorrect buffer solutions – Change calibration procedure
– Buffer solutions too old – Use only once.
Note the shelf life
– Buffer solutions depleted – Change solutions
Multi 3320 What to do if...
ba77053d01 02/2014 89
No stable measured
value
Obviously incorrect
measured values
Cause Remedy
Electrode:
– Junction contaminated – Clean junction
– Membrane contaminated – Clean membrane
Test sample:
– pH value not stable – Measure with air excluded if
necessary
– Temperature not stable – Temper if necessary
Electrode + test sample:
– Conductivity too low – Use suitable combination elec-
trode
– Temperature too high – Use suitable combination elec-
trode
– Organic liquids – Use suitable combination elec-
trode
Cause Remedy
Electrode:
– Electrode unsuitable – Use suitable combination elec-
trode
– Temperature difference between
buffer and test sample too great
– Adjust temperature of buffer or
sample solutions
– Measurement procedure not suit-
able
– Follow special procedure
What to do if... Multi 3320
90 ba77053d01 02/2014
14.2 ISE
Error message OFL
Obviously incorrect
measured values
Error message,
Error (invalid
calibration)
Warning [TpErr]
Warning [ISEErr]
Cause Remedy
– Measuring range exceeded – Dilute test sample
Cause Remedy
– Electrode not connected – Connect electrode
– Cable broken – Replace electrode
Cause Remedy
ISE electrode:
– Moisture in the plug – Dry plug
– Electrode obsolete – Replace electrode
– Electrode unsuitable for the range to
be measured
– Use suitable combination elec-
trode
– Electrode not suitable for the
selected ion
– Use a suitable electrode or
select a suitable ion
– The gas-sensitive electrode NH 500
was calibrated with the Ion
type setting
– Select the following settings:
Ion type = ION,
Valency = -1
– Socket damp – Dry socket
Calibration procedure:
– Calibration standards do not have
the correct temperature (max. ± 2 °C
temperature difference)
– Adjust the temperature of the
calibration standards
Cause Remedy
– Temperature difference between
measurement and calibration
greater than 2 K.
– Adjust the temperature of the
test sample
Cause Remedy
– Electrode voltage outside calibrated
range
– Recalibrate
Multi 3320 What to do if...
ba77053d01 02/2014 91
14.3 Dissolved oxygen
Error message
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
Error message
Leak
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
– The measured value is outside
the measuring range of the meter
– Use a suitable D.O. sensor
Cause Remedy
– D.O. sensor contaminated
– Electrolyte depleted
– Clean the D.O. sensor
– Change the electrolyte and
membrane cap
– If necessary, replace the D.O.
sensor
Cause Remedy
– Membrane cap not screwed on
tight enough
– Hole in the membrane
– Screw membrane head tighter
– Replace and refill the mem-
brane cap
What to do if... Multi 3320
92 ba77053d01 02/2014
14.4 Conductivity
Error message
OFL, UFL
The measured value is outside the measuring range.
Error message,
Error
More information and instructions on cleaning and exchange of
sensors are given in the documentation of your sensor.
Cause Remedy
– The measured value is outside
the measuring range of the meter
– Use suitable measuring cell
Cause Remedy
– Measuring cell contaminated – Clean cell and replace it if nec-
essary
– Calibration solution not suitable – Check the calibration solutions
Multi 3320 What to do if...
ba77053d01 02/2014 93
14.5 General information
Sensor symbol
flashes
Display
Meter does not react
to keystroke
You want to know
which software
version is in the
meter
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
Cause Remedy
– Batteries almost empty – Replace the batteries (see
section 13.1 MAINTENANCE,
page 86)
Cause Remedy
– Operating condition undefined or
EMC load unallowed
– Processor reset:
Press the <ENTER> and <On/
Off> key simultaneously
Cause Remedy
– E.g., a question by the service
department
– Switch on the meter.
Open the menu, <ENTER__>
/ Storage & config / System /
Service information. The
instrument data are displayed.
Technical data Multi 3320
94 ba77053d01 02/2014
15 Technical data
15.1 Measuring ranges, resolution, accuracy
15.1.1 pH/ORP
Measuring ranges,
resolution
Parameter Measuring range Resolution
pH -2.0 ... +20.0 0.1
-2.00 ... +20.00 0.01
- 2.000 ... + 19.999 0.001
U [mV] -1200.0 ... +1200.0 0.1
-2500 ... +2500 1
T [°C] -5.0 ... +105.0 0.1
T [°F] 23.0 ... +221.0 0.1
Manual
temperature input
Parameter Range Increment
Tmanual [°C] -25 ... +130 1
Tmanual [°F] -13 ... +266 1
Accuracy (± 1 digit) Parameter Accuracy Temperature of the test
sample
pH / range *
-2.0 ... +20.0 ± 0.1 +15 °C ... +35 °C
-2.00 ... +20.00 ± 0.01 +15 °C ... +35 °C
- 2.000 ... + 19.999 ± 0.005 +15 °C ... +35 °C
U [mV] / range
-1200.0 ... +1200.0 ± 0.3 +15 °C ... +35 °C
-2500 ... +2500 ± 1 +15 °C ... +35 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
* when measuring in a range of ± 2 pH around a calibration point
The accuracy values specified here apply exclusively to the meter.
The accuracy of the electrodes and buffer solutions has to be taken
into account additionally.
Multi 3320 Technical data
ba77053d01 02/2014 95
15.1.2 ISE
15.1.3 Oxi
Measuring ranges,
resolution
Parameter Measuring range Resolution
ISE [mg/l] 0.000 ... 9.999
10.00 ... 99.99
100.0 ... 999.9
1000 ... 999999
0.001
0.01
0.1
1
ISE [µmol/l] 0.000 ... 9.999
10.00 ... 99.99
100.0 ... 999.9
1000 ... 999999
0.001
0.01
0.1
1
[mmol/l] 1000 ... 999999 1
ISE [mg/kg] 0.000 ... 9.999
10.00 ... 99.99
100.0 ... 999.9
1000 ... 999999
0.001
0.01
0.1
1
ISE [ppm] 0.000 ... 9.999
10.00 ... 99.99
100.0 ... 999.9
1000 ... 999999
0.001
0.01
0.1
1
ISE [%] 0.000 ... 9.999
10.00 ... 99.99
100.0 ... 999.9
1000 ... 999999
0.001
0.01
0.1
1
Manual
temperature input
Parameter Range Increment
Tmanual [°C] - 20 ... + 130 1
Measuring ranges,
resolution
The values quoted in brackets apply especially to the DurOx 325 sen-
sor.
Parameter Measuring range Resolution
Concentration [mg/l] 0 ... 20.00 (0 ... 20.0)
20.0 ... 90.0
(20 ... 90)
0.01 (0.1)
0.1 (1)
Saturation [%] 0 ... 200.0 (0 ... 600)
0 ... 600
0.1 (1)
1
D.O. partial pressure
[mbar]
0 ... 200.0 (0 ... 1250)
0 ... 1250
0.1 (1)
1
T [°C] 0 ... 50.0 0.1
Technical data Multi 3320
96 ba77053d01 02/2014
Accuracy (± 1 digit) Parameter Accuracy
Concentration [mg/l] ± 0.5 % of measured value
at ambient temperature of +5 °C ... +30 °C
Saturation [%] ± 0.5% of measured value
when measuring in the range of ± 10 K
around the calibration temperature
D.O. partial pressure
[mbar]
± 0.5 % of measured value
at ambient temperature of +5 °C ... +30 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
Correction functions Temperature
compensation
Accuracy better than 2 % at 0 ... +40 °C
Salinity correction 0 ... 70.0 SAL
Air pressure correc-
tion
Automatic through integrated
pressure sensor in the range of 500 ... 1100
mbar
The accuracy values specified here apply exclusively to the meter.
The accuracy of the D.O. sensors has also to be taken into
account.
Multi 3320 Technical data
ba77053d01 02/2014 97
15.1.4 Cond
Measuring ranges,
resolution
Parameter Measuring range Resolution
ϰ [µS/cm] 0.000 ... 1.999*
0.00 ... 19.99**
0.0 ... 199.9
200 ... 1999
0.001
0.01
0.1
1
ϰ [mS/cm] 2.00 ... 19.99
20.0 ... 199.9
200 ... 1000
0.01
0.1
1
ρ (Resistivity)
[Ohm*cm]
1.000 ... 1.999
2.00 ... 19.99
20.0 ... 199.9
200 ... 1999
0.001
0.01
0.1
1
ρ (Resistivity)
[kOhm*cm]
2.00 ... 19.99
20.0 ... 199.9
200 ... 1999
0.01
0.1
1
ρ (Resistivity)
[MOhm*cm]
2.00 ... 19.99**
20.0 ... 199.9*
0.01
0.1
SAL 0.0 ... 70.0
according to the IOT
table
0.1
TDS 0 ... 1999 mg/l
2.00 ... 19.99 g/l
20.0 ... 199.9 g/l
1
0.01
0.1
T [°C] -5.0 ... +105.0 0.1
T [°F] +23.0 ... +221.0 0.1
* only possible with cells of the cell constant, 0.010 cm-1
** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ... 0.110 cm-1
Cell constants Cell constant C Values
Can be calibrated in
the ranges
0.450 ... 0.500 cm-1
0.800 ... 0.880 cm-1
Adjustable 0.090 ... 0.110 cm-1
0.010 cm-1 (fixed)
0.250 ... 25.000 cm-1
Reference temperature Reference tempera-
ture
Values
Adjustable 20 °C (Tref20)
25 °C (Tref25)
Technical data Multi 3320
98 ba77053d01 02/2014
Accuracy (± 1 digit) Parameter Accuracy Temperature of the test
sample
ϰ and ρ / Temperature compensation
None (Off) ± 0.5 %
Nonlinear (nLF) ± 0.5 % 0 °C ... + 35 °C
according to EN 27 888
± 0.5 % +35 °C ... + +50 °C
enhanced nLF function
Linear (lin) ± 0.5 % +10 °C ... + +75 °C
SAL / range
0.0 ... 42.0 ± 0.1 +5 °C ... +25 °C
± 0.2 +25 °C ... +30 °C
TDS [mg/l]
± 0.5 %
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
The accuracy values specified here apply exclusively to the meter.
The accuracy of the measuring cell has also to be taken into
account.
Further data are given in the documentation of your sensor.
Multi 3320 Technical data
ba77053d01 02/2014 99
15.2 General data
Dimensions Multi 3320: Approx. 180 x 80 x 55 mm
Weight Multi 3320: Approx. 0.4 kg
Mechanical structure Type of protection IP 67
Electrical safety Protective class III
Test certificates CE, cETLus
Ambient
conditions
Storage -25 °C ... +65 °C
Operation +5 °C ... +55 °C
Admissible relative
humidity
Yearly mean: < 75 %
30 days/year: 95 %
Other days: 85 %
Power
supply
Batteries 4 x 1.5 V alkali-manganese batteries, type
AA
Rechargeable batter-
ies
4 x 1.2 V NiMH rechargeable batteries,
type AA
(no charging function)
Operational life Up to 1000 h without / 150 h with illumination
pH sesnor input Input resistance > 5 * 1012 ohm
Input current < 1 * 10-12 A
USB interface Type USB 1.1
USB B (device), data output
Baud rate Adjustable:
1200, 2400, 4800, 9600, 19200 Baud
Data bits 8
Stop bits 2
Parity None
Handshake RTS/CTS
Cable length Max. 3 m
Applicable directives
and standards
EMC EC directive 2004/108/EC
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
Meter safety EC directive 2006/95/EC
EN 61010-1
UL 61010-1
CAN/CSA-C22.2#61010-1
IP protection class EN 60529
Firmware update Multi 3320
100 ba77053d01 02/2014
16 Firmware update
Available firmware updates are provided on the Internet.
With the firmware update program and a PC you can update the firmware of the
Multi 3320 to the newest version.
For the update you have to connect the meter to a PC.
For the update via the USB interface, the following is required:
-a free USB interface (virtual COM port) on the PC
-the driver for the USB interface (on the enclosed CD-ROM)
-the USB cable (included in the scope of delivery of the Multi 3320).
After switching the meter off and on you can check whether the meter has taken
over the new software version (see YOU WANT TO KNOW WHICH SOFTWARE
VERSION IS IN THE METER, PAGE 93).
1. Install the downloaded firmware update on a PC.
An update folder is created in the Windows start menu.
If an update folder already exists for the meter (or meter type), the new
data is displayed there.
2. In the windows start menu, open the update folder and start the firmware
update program.
3. Using the USB interface cable, connect the Multi 3320 to a USB inter-
face (virtual COM port) of the PC.
4. Switch on the Multi 3320.
5. In the firmware update program, start the update process with OK.
6. Follow the instructions of the firmware update program.
During the programming process, a corresponding message and a
progress bar (in %) are displayed.
The programming process takes approx. three minutes. A terminatory
message is displayed after a successful programming process. The
firmware update is completed.
7. Disconnect the Multi 3320 from the PC.
The Multi 3320 is ready for operation again.
Multi 3320 Glossary
ba77053d01 02/2014 101
17 Glossary
pH/ORP/ISE
Dissolved oxygen
Asymmetry see zero point
Junction The junction is a porous body in the housing wall of reference elec-
trodes or electrolyte bridges. It arranges the electrical contact between
two solutions and makes the electrolyte exchange more difficult. The
expression, junction, is also used for ground or junction-less transitions.
Electromotive force of
a combination elec-
trode
The electromotive force U of the combination electrode is the measur-
able electromotive force of an electrode in a solution. It equals the sum
of all the galvanic voltages of the combination electrode. Its depen-
dency on the pH results in the electrode function, which is characterized
by the parameters, slope and zero point.
Zero point The zero point of a pH combination electrode is the pH value at which
the electromotive force of the pH combination electrode at a specified
temperature is zero. Normally, this is at 25 °C.
pH value The pH value is a measure of the acidic or basic effect of an aqueous
solution. It corresponds to the negative decadic logarithm of the molal
hydrogen ions activity divided by the unit of the molality. The practical
pH value is the value of a pH measurement.
Potentiometry Name of a measuring technique. The signal (depending on the mea-
sured parameter) of the electrode is the electrical potential. The electri-
cal current remains constant.
ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in
water if these substances become effective on an electrode surface
(e.g. a gold or platinum surface).
Slope The slope of a linear calibration function.
OxiCal®WTW name for a procedure to calibrate D.O. measuring systems in
water vapor saturated air.
Salinity The absolute salinity SA of seawater corresponds to the relationship
of the mass of dissolved salts to the mass of the solution (in g/Kg). In
practice, this dimension cannot be measured directly. Therefore, the
practical salinity according to IOT is used for oceanographic monitor-
ing. It is determined by measuring the electrical conductivity.
Salt content General designation for the quantity of salt dissolved in water.
Oxygen partial pres-
sure
Pressure caused by the oxygen in a gas mixture or liquid.
Oxygen saturation Short name for the relative D. O. saturation.
Glossary Multi 3320
102 ba77053d01 02/2014
Conductivity
General information
Slope (relative) Designation used by WTW in the D.O. measuring technique.
It expresses the relation of the slope value to the value of a theoretical
reference probe of the same construction type.
Conductivity Short form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity.
It is a measured value of the ability of a substance to conduct an electric
current. In water analysis, the electrical conductivity is a dimension for
the ionized substances in a solution.
Reference tempera-
ture
Fixed temperature value to compare temperature-dependent measured
values. For conductivity measurements, the measured value is con-
verted to a conductivity value at a reference temperature of 20 °C or 25
°C.
Salinity The absolute salinity SA of seawater corresponds to the relationship of
the mass of dissolved salts to the mass of the solution (in g/Kg). In prac-
tice, this dimension cannot be measured directly. Therefore, the practi-
cal salinity according to IOT is used for oceanographic monitoring. It is
determined by measuring the electrical conductivity.
Salt content General designation for the quantity of salt dissolved in water.
Temperature coeffi-
cient
Value of the slope of a linear temperature function.
Temperature compen-
sation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the measured
parameter to be determined, the temperature compensation functions
in different ways. For conductimetric measurements, the measured
value is converted to a defined reference temperature. For potentiomet-
ric measurements, the slope value is adjusted to the temperature of the
test sample but the measured value is not converted.
Resistance Short name for the specific electrolytic resistance. It corresponds to the
reciprocal value of the electrical conductivity.
Cell constant C Characteristic quantity of a conductivity measuring cell, depending on
the geometry.
α
TRef
=
Meas*1
1+ a(T - )
*TRef
Resolution Smallest difference between two measured values that can be dis-
played by a meter.
AutoRange Name of the automatic selection of the measuring range.
Multi 3320 Glossary
ba77053d01 02/2014 103
Adjusting To manipulate a measuring system so that the relevant value (e.g. the
displayed value) differs as little as possible from the correct value or a
value that is regarded as correct, or that the difference remains within
the tolerance.
Calibration Comparing the value from a measuring system (e.g. the displayed
value) to the correct value or a value that is regarded as correct. Often,
this expression is also used when the measuring system is adjusted at
the same time (see adjusting).
Channel A channel is a display indication that corresponds to a physical connec-
tion on the meter.
Measured variable The measured parameter is the physical dimension determined by
measuring, e.g. pH, conductivity or D.O. concentration.
Test sample Designation of the test sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample and
original sample are identical if the test sample was not processed.
Measured value The measured value is the special value of a measured parameter to be
determined. It is given as a combination of the numerical value and unit
(e.g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
Reset Restoring the original condition of all settings of a measuring system.
Stability control (Au-
toRead )
Function to control the measured value stability.
Standard solution The standard solution is a solution where the measured value is known
by definition. It is used to calibrate a measuring system.
Temperature function Name of a mathematical function expressing the temperature behavior
of a test sample, a sensor or part of a sensor.
Glossary Multi 3320
104 ba77053d01 02/2014
Multi 3320 Index
ba77053d01 02/2014 105
18 Index
A
Air calibration beaker . . . . . . . . . . . . . . . . . 50
Automatic switch-off function . . . . . . . . . . . 15
AutoRead . . . . . . . . . . . . . . . . . . . . . . . 48, 56
ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
pH . . . . . . . . . . . . . . . . . . . . . . . . . 22, 40
B
Battery compartment . . . . . . . . . . . . . . 11, 86
C
Calibration
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
pH . . . . . . . . . . . . . . . . . . . . . . . . . 25, 38
Calibration evaluation . . . . . . . . . . . . . 53, 59
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Calibration interval . . . . . . . . . . . . . 64, 69, 72
Calibration points
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Comparison measurement (D.O.) . . . . . . . 50
Connecting a PC . . . . . . . . . . . . . . . . . . . . 85
Control standard . . . . . . . . . . . . . . . . . . . . 58
Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
D
Dataset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Date and time . . . . . . . . . . . . . . . . . . . . . . . 19
Default settings
Measured parameter . . . . . . . . . . . 75, 76
System settings . . . . . . . . . . . . . . . . . . 77
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
E
Energy saving mode . . . . . . . . . . . . . . . . . 80
F
Firmware update . . . . . . . . . . . . . . . . . . . 100
I
Initial commissioning . . . . . . . . . . . . . . . . . 10
Initialize . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Interval for calibration . . . . . . . . . . . 64, 69, 72
K
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
M
Measured value display . . . . . . . . . . . . . . . 16
Measurement accuracy . . . . . . . . . 64, 69, 72
Measurement data storage
Edit . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Erase . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Storage locations . . . . . . . . . . . . . . . . 83
Measurement dataset . . . . . . . . . . . . . . . . 83
Measuring . . . . . . . . . . . . . . . . . . . . . . 47, 55
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
ORP . . . . . . . . . . . . . . . . . . . . . . . . . . 36
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Menus (navigation) . . . . . . . . . . . . . . . . . . 16
Messages . . . . . . . . . . . . . . . . . . . . . . . . . 17
P
pH buffer sets . . . . . . . . . . . . . . . . . . . . . . 62
Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
R
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
S
Scope of delivery . . . . . . . . . . . . . . . . . . . . 10
Single-point calibration
pH . . . . . . . . . . . . . . . . . . . . . . . . . 26, 30
Slope
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Slope, relative . . . . . . . . . . . . . . . . . . . . . . 50
Socket field . . . . . . . . . . . . . . . . . . . . . . . . 14
Storage interval . . . . . . . . . . . . . . . . . . . . . 79
Storing in memory . . . . . . . . . . . . . . . . . . . 78
Automatic . . . . . . . . . . . . . . . . . . . . . . 79
Manual . . . . . . . . . . . . . . . . . . . . . . . . 78
T
TDS factor . . . . . . . . . . . . . . . . . . . . . . . . . 73
Temperature compensation . . . . . . . . . . . 72
Temperature measurement . . . . . . . . . . . . 49
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
pH . . . . . . . . . . . . . . . . . . . . . . . . . 24, 38
Three-point calibration
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
pH . . . . . . . . . . . . . . . . . . . . . . . . . 27, 31
Transmitting data . . . . . . . . . . . . . . . . . . . 84
automatic . . . . . . . . . . . . . . . . . . . . . . . 84
Manual . . . . . . . . . . . . . . . . . . . . . . . . 84
Transmitting measured values . . . . . . . . . 84
Two-point calibration
ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
pH . . . . . . . . . . . . . . . . . . . . . . . . . 26, 30
Index Multi 3320
106 ba77053d01 02/2014
Z
Zero point of pH electrode . . . . . . . . . . . . .25
Wissenschaftlich-Technische
Werkstätten GmbH
Dr.-Karl-Slevogt-Straße 1
D-82362 Weilheim
Germany
+49 881 183-0
+49 881 183-420
info@wtw.com
www.wtw.com
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