382068 EU EN V4.0 Installation Directions

2014-07-05

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User's Manual

Datalogging AC/DC Power Clamp-on Meter

Model 382068

382068-EU-EN-V4.0 12/11

Table of Contents

Specifications

General Specifications …………………………………………………………. 3

Range Specifications……………………………………………………………. 3

Safety Information ……………………………………………….………………. 5

Meter and Display Descriptions………………………………..……….……… 6

Measurements

AC/DC Power Measurements………………………………………………….. 7

AC/DC Voltage Measurements………………………………………………… 16

AC/DC Current Measurements………………………………………….……… 17

Resistance and Continuity Measurements…………………………….……… 18

Diode Tests …………………….…………….……………………………..…… 19

Min/Max Mode ………………………………….……………………………..…… 19

Peak Detector ………………………………….……………………………..…… 19

Data Hold .………………………………….…………………………………..…… 19

Datalogging …………………………………….……………………………...…... 20

Maintenance

Battery Replacement..………………………………….…………………..…… 21

Cleaning ………………………………….……………………………..……….. 21

Repair and Calibration Services ………………………………………….……. 21

Tech Support Hotlines..………………………………….………………………. 21

Introduction

Congratulations on your purchase of the Extech 382065/382068 Datalogging AC/DC Power Clamp-

on Meter. Measurements include DC and AC True Power, Apparent Power, Power Factor, and True

RMS Voltage, Current, & Watts. Status indication for Lead/Lag and PF is included as well as dual

displays of KW + PF, KVA + PF, V + A, A + Hz, and V + Hz. The frequency of Voltage and Current

measurements can be displayed also. Datalogger and PC interface features are built into the meter.

The Datalogger/Data Acquisition Software package is for exclusive use with the Model

382065/382068 Clamp on Power Datalogger. Windows® XP, Vista, Window’s 7-32 bit, and 7-64 bit

operating systems are supported. Users can download readings stored in the datalogger to a PC,

program sample rates for datalogging, remotely monitor readings, and save readings to ASCII files

for export to spreadsheet and other programs. Careful use will provide years of reliable service.

382068-EU-EN-V4.0 12/11

Specifications

General Specifications

Main display 4-digit (10,000 count) multi-function LCD

Bargraph display 40-segment bargraph

Datalogger 4000 data point continuous logging (25 point manual logging)

with MIN / MAX and Peak detect recording

Peak hold Built-in detector captures positive and negative peaks to .1ms

Maximum voltage 600Vrms between any terminal and earth ground

Meter power 9V battery

Battery life 30 hours (approx.)

Low battery indication Battery icon is displayed

Auto power off After 30 minutes (approx.)

Display update rate 2 times per second (Bargraph); 5 times per second (Digits),

(once every 6 seconds for the KW function)

Jaw opening For Cables φ 1.8” (46mm)

Operating temperature 32 to 122oF (0 to 50oC)

Operating Humidity R.H. < 80% non-condensing.

Storage temperature 14o to 140oF (-10 to 60oC)

Storage Humidity RH < 70% non-condensing

Dimensions/Weight 10.24 x 3.66 x 1.77" (260 x 93 x 45mm) / 1 lb. (450g)

Accessories Carrying case, test leads, and 9V battery

Range Specifications

Accuracy specs are ± (reading + no. of digits) at 64o to 82oF (18o to 28o C) and RH to 80%

True power & Apparent power measurements (600KW Max.)

Input Resolution Accuracy

Frequency

range

Overload

protection

V<130V, A<150A

V>130V, A<150A

V<130V, A>150A

0.01

(2%+5)

V>130V, A>150A 0.1

(2%+1)

45Hz to 500Hz 600V/1100A

Power Factor

Range* Resolution Accuracy Frequency Range Sensitivity

0.30 to 1.00 ± (4% + 10d)

0.00 to 0.30

0.001

Not specified

10Hz to 5KHz >100V / 10A

*Minimum voltage: 100V AC, Minimum Current: 20A AC

DCA

Range Resolution Accuracy Overload protection

2 to 1000A 0.1A ±(1.5% + 5) 1100A

382068-EU-EN-V4.0 12/11

ACA

Range Resolution Accuracy Frequency range Overload

protection

2 to 1000A 0.1A ±(1.5% + 5) 45Hz to 500Hz 1100A

Crest factor < 3 for stated accuracy

DCV

Range Resolution Accuracy Input impedance Overload

protection

2 to 600V 0.1V ±(0.5% + 5) 1MΩ 600V

ACV

Range Resolution Accuracy Input

impedance

Frequency

range

Overload

protection

2 to 600V 0.1V

(0.5%+5)

1MΩ 45Hz to 500Hz 600Vrms

Crest factor < 3 for stated accuracy

Peak indication

Range Resolution Accuracy Overload protection

20A~80A 0.1A ±(10% + 10) 1100A

80A~1000A 0.1A ±(6% + 10) 1100A

Peak detect acquisition time .1ms

Peak indication

Range Resolution Accuracy Overload protection

20V~80V 0.1V ±(10% + 10) 600Vrms

80V~600V 0.1V ±(6% + 10) 600Vrms

Peak detect acquisition time .1ms

Audible continuity

Range Continuity

beeper Open circuit voltage Overload

protection

< 50 Ω 3.2V 600Vrms

Resistance ( Ω )

Range Resolution Accuracy Open circuit

voltage

Overload

protection

10KΩ 1

Ω ±(1% + 5) 3.2 V 600Vrms

Diode test

Range Resolution Overload protection

0.001V 600Vrms

Frequency (Hz)

Range Resolution Accuracy Voltage

sensitivity

Overload

protection

1KHz 0.1Hz

5KHz 10 Hz

±(0.5% + 5) 10V or 10A 600V / 1100A

382068-EU-EN-V4.0 12/11

Safety Information

1. Read the following safety information carefully before attempting to operate or service the

meter.

2. Read all operating instructions before use.

3. To avoid damage to the instrument do not exceed the published input limits.

4. Do not use the meter or test leads if they appear damaged. Use extreme caution when working

around bare conductors or bus bars. Accidental contact with a conductor could result in electric

shock.

5. Use the meter only as specified in this manual otherwise the protection provided by the meter

may be impaired.

6. Use caution when working with voltages above 60VDC or 30VAC RMS. Such voltages pose a

shock hazard.

7. Before taking resistance or continuity measurements, disconnect the circuit from the main power

supply and disconnect all loads from the circuit.

8. Safety Specifications:

• Installation categories III

• Pollution degree 2

• Altitude: 2000m max

• Indoor use only

Safety symbols

Caution: Refer to this manual before using the meter.

Dangerous voltages.

Meter is protected throughout by double insulation or reinforced insulation.

When servicing, use only specified replacement parts.

Complies with EN-61010-1, IEC 1010-2-32

382068-EU-EN-V4.0 12/11

KVA

P P-

3 3W

MEM

PF lead l ag

WL12 3 READ

3 4W Hz

KVA

MINMAX HOLD -

RECORD

HOLD

1000A

OFF

3 4W

3 3W

600V CATMAX

Meter Description

1. Transformer jaws

2. Jaw trigger

3. Data Hold button

4. Function selector

5. Peak Detector READ button

6. MIN/MAX/PEAK function button

7. DC A/W ZERO button

8. RECORD button

9. LCD display

10. PC Interface Jack

11. COM terminal

12. VΩHz terminal

13. Low battery indication

14. Analog Display

15. Bargraph Display

16. Units Symbols

Figure 1

Figure 2

KVA

P P-

3 3W

MEM

PF lead lag

WL123 READ

3 4W Hz

KVA

MINMAX

HOLD -

RECORD

READ

3 4W

PF lead lag

WL123

RECORD

3 3W

MEM

KVA

MAX

P P-HOLD MIN-

382068-EU-EN-V4.0 12/11

AC/DC Power Measurements

AC/DC 1φ2W Power (W) and Power Factor (PF) Measurements

PF l ag

HOLD

1000A

OFF

3 4W

3 3W

600V CATMAX

600V MAX CAT

PF lag

Figure 3

1. With the clamp jaws empty, turn the clamp meter on by setting the rotary switch to the KW position

(refer to figure 3).

2. Insert the test leads into the input terminals (black lead to COM and red lead to '+').

3. Connect the probe end of the black test lead to the neutral line.

4. Connect the probe end of the red lead to the power line.

5. Clamp the meter onto the conductor where the red test lead is connected.

6. The power clamp will automatically select the appropriate range.

7. Read the Watt (middle of display) and PF (top display) values on the LCD.

8. Press the READ button to scroll through the dual displays of KW + PF, A + V, and KVA + PF.

WARNING

Do not clamp on to a conductor when zeroing the jaw's

residual magnetic field until the LCD reads zero.

382068-EU-EN-V4.0 12/11

Note: When calculating KVAR, the KVAR accuracy greatly depends on V, A and KW measurement

accuracy (especially when PF is very close to 1). To get a more accurate value when PF is greater

than 0.91 (φ < 25°), use the following equation for a pure sine wave

KVA

PF = KVA (Apparent Power): KVA = 1000

*AV

KVAR (Reactive Power): KVAR= 22 (KW)(KVA) −

3φ3W AC/DC Power Measurement

Figure 4

Note: The "+" sign printed on the jaw must face the power source.

600V MAX CAT

WL12

3 3W

PF lag

WL12

MAX600V CAT

WL1 2

PF lag

3 3W

3 4W

3 3W

1000A

HOLD

OFF

382068-EU-EN-V4.0 12/11

With the Clamp jaws empty, turn the meter on

setting the rotary switch to the 3φ3W position.

WL12 will appear on the upper left side of the LCD prompting the user to take a

WRS (L2 L1) measurement.

1. Insert the test leads into the input terminals (black to COM terminal and red to '+').

2. Select one phase (eg. S or L2) as COM and connect the probe end of the black lead to that

phase (eg. S or L2).

3. Connect the probe end of the red test lead to the second phase (eg. R or L1).

4. Clamp the meter onto the same phase as the red test lead (eg. R or L1).

5. The meter will automatically select the proper range.

6. Wait until the reading is stable (about 6 seconds), and then press the READ button. WL23 will

appear prompting the user to take a measurement of

(WL3 L2).

B. Measure W

TS (L3 L2)

(refer to figure 5).

1. Disconnect the red test lead from the phase where the clamp is connected.

2. Connect the red test lead to the third phase (eg. T or L3).

3. Clamp onto the third phase (where the red test lead is connected; eg. T or L3).

4. The meter will automatically select the proper range.

5. Wait until the reading is stable (about 6 seconds) and then press the READ button.

C. The power clamp will process these measurements

and display the result.

WL123

appears in the upper left corner of the LCD and the 3

3W power measurement is

displayed in watts (this value is now stored in meter memory). The following equations are

provided for your information.

3W = WRS(L1L2) + WTS(L3L2)

WWW KVAR

KKVA 33

φφφ

WKVA

Notes:

1. Once a phase is designated as common (COM) it should remain as such in all

subsequent measurements. For example, if the S (or L2) phase is selected, S

(or L2) phase is connected to COM during the measurements of WRS (or

WL1L2) and WTS (or WL3L2) in 3φ 3W unbalanced power.

2. The "+" sign printed on the jaw must face the power source.

3. In 3φ3W unbalanced power measurements, if either WRS or WTS is negative

(connection error) ensure that all test lead and clamp connections are correct.

382068-EU-EN-V4.0 12/11

600V

PF lag

3 3W

WL1 23

MAX CAT

HOLD

Figure 5

Figure 6

600V CATMAX

WL 23

PF lag

3 3W

MAX CAT600V

WL 23

PF lag

3 3W

3 4W

3 3W

1000A

OFF

HOLD

WL 23

3 3W

382068-EU-EN-V4.0 12/11

3φ4W AC/DC Power Measurement

600V MAX CAT

PF lag

WL1

3 4W

MAX600V CAT

WL1

3 4W

PF lag

3 4W

3 3W

1000A

HOLD

OFF

WL1

3 4W

Figure 7

HOLD

CAT600V MAX

WL 2

PF lag

3 4W

600V CATMAX

PF lag

WL 2

3 4W

3 3W

3 4W

1000A

OFF

WL 2

3 4W

Figure 8

382068-EU-EN-V4.0 12/11

600V CATMAX

PF lag

WL 3

3 4W

MAX600V CAT

3 4W

WL 3

3 4W

PF lag

OFF

3 3W

1000A

HOLD

WL 3

3 4W

Figure 9

600V

PF lag

WL123

MAX CAT

HOLD

3 4W

Figure 10

382068-EU-EN-V4.0 12/11

A. Measure W

R (L1)

/ P

FR (L1)

(refer to figure 6).

1. With the jaw enclosure empty, turn the meter on by setting the rotary switch to the 3φ4W position.

2. Insert the test leads into the input terminals (black lead to the COM terminal and red to '+').

3. Connect the black lead's probe end to the neutral line.

4. Connect the red lead's probe end to the first phase (eg. R or L1).

5. Clamp on to the same phase as the red test lead (eg. R or L1).

6. The meter will automatically select the proper range.

7. Wait until the reading is stable (about 6 seconds) then press the READ button. WL1 will disappear

and WL2 will appear prompting the user to take a WS (L2) / PFS (L2) measurement.

Measure WS (L2)/PFS (L2) (refer to figure 7)

1. Disconnect the red test lead from the phase where the jaws are clamped.

2. Connect the red test lead to the second phase (eg. S or L2).

3. Clamp onto the phase where the red test lead is connected (eg. S or L2 phase)

4. The meter will automatically select the proper range.

5. Wait until the reading is stable (about 6 seconds) then press the READ button. WL2 will disappear

and WL3 will appear prompting the user to take a WT (L3) / PFT (L3) measurement.

C. Measure W

T (L3)

FT (L3)

(refer to figure 8)

1. Disconnect the red test lead from the phase where the meter's jaws are clamped.

2. Connect the red test lead to the third phase (eg. T or L3 phase).

3. Clamp onto the phase where the red test lead is now connected (eg. T or L3).

4. The meter will automatically select the proper range.

5. Wait until the reading is stable (about 6 seconds) and then press the READ button. WL3 will

disappear from the upper left hand area of the LCD.

6. The meter will process these three sets of data (refer to figure 9) and display the 3φ4W power

measurement (WL123 will be displayed). The 3φ4W measurement will then be stored in

memory. The following equations are provided for your information.

4W = WR(L1) + WS(L2) WT(L3)

WWW KVAR

KKVA 43

φφφ

WKVA

Notes:

1. The "+" sign printed on jaw must face the power source.

2. For 3φ4W power measurements, WR or WS and WT must be positive. If any are

negative, check the test lead and clamp connections for polarity errors.

382068-EU-EN-V4.0 12/11

1φ3W Power Measurement

MAX600V CAT

PF lag

WL12

3 3W

MAX600V CAT

WL12

PF l ag

3 3W

3 4W

3 3W

1000A

HOLD

OFF

WL12

3 3W

Figure 11

600V CATMAX

PF lag

3 3W

WL 2 3

MAX CAT600V

WL 23

PF lag

3 3W

3 4W

3 3W

1000A

OFF

HOLD

WL 23

3 3W

Figure 12

382068-EU-EN-V4.0 12/11

φ3W power measurements are similar to 3φ3W

unbalanced power measurement except for the

nomenclature. Two measurements are required: WRS

(L1G) and WTS (L2G).

A. Measure W

RS (L1G)

(refer to figure 11).

1. With the Clamp jaws empty, turn the meter on by

setting the rotary switch to the 3φ3W position.

2. Insert the test leads into the input terminals.

3. Connect the probe end of the black lead to

ground.

4. Connect the probe end of the red lead to the

second phase (eg. L1).

5. Clamp onto the second phase (eg. L1).

6. The meter will automatically select the proper

range.

7. Wait until the reading is stable (about 6 seconds)

and then press the READ button.

8. WL23 will appear prompting the user to take the

WTS (L2G) measurement.

Figure 13

B. Measure W

or W

L2G

(refer to figure 12).

1. Disconnect the red test lead from the phase where the jaws are clamped.

2. Connect the red test lead to the L2 line.

3. Clamp onto the L2 line (where the red test lead is connected).

4. The meter will automatically select the proper range.

5. Wait until the reading is stable (about 6 seconds) and then press the READ button.

C. The power clamp sums the

two values

, displays the result, and stores the 1φ3W power

measurement in memory. Note the following equation:

W1φ3W = WRST = WRS(L1G) + WTS(L2G)

600V

PF lag

3 3W

WL123

MAX CAT

HOLD

382068-EU-EN-V4.0 12/11

Current and Voltage Measurements

AC, DC, and AC+DC Voltage Measurements

HOLD

1000A

OFF

3 4W

3 3W

600V CATMAX

Figure 14

Warning: The maximum input is 600V. Do not attempt to take voltage measurements

that exceed this limit; electrical shock and damage to the clamp meter can result.

1. Set the rotary switch to the 'V' position (refer to figure 14).

2. Insert the test leads into the input terminals (black lead to COM and red to '+').

3. Connect the probe ends of the test leads in PARALLEL to the circuit to be measured.

4. The meter will automatically select the appropriate range and units (AC or DC).

5. Read the voltage and frequency values displayed on the LCD.

Note: The sensitivity for frequency measurements is 10V. The frequency range is 45 –

500Hz. If the frequency is less than 45 Hz, the LCD will display "------".

382068-EU-EN-V4.0 12/11

AC, DC, and AC+DC Current Measurements

HOLD

1000A

OFF

3 4W

3 3W

600V CATMAX

CAT600V

Figure 15

1. Set the rotary switch to the '1000A' position (refer to figure 15).

2. For DC, press and hold the ZERO button until a beep is heard to zero the reading; the LCD will

display “- - - -” while zeroing.

3. Press the trigger to open the jaw.

4. Fully enclose the conductor to be measured. Do not allow a gap between the two jaw halves

when measuring.

5. The clamp will automatically select the appropriate range.

6. Read the current and frequency values displayed on the LCD.

Note: The current sensitivity for frequency measurements is 10A. The frequency range

is 45 - 500Hz. If the frequency is less than 45 Hz, the LCD will display "------"

382068-EU-EN-V4.0 12/11

Resistance and Continuity Measurements

Warning: Before taking any in-circuit resistance measurements, remove

power from the circuit under test and discharge all capacitors.

1. Set the function switch to the Ω position for both resistance and continuity measurements.

2. Connect the black test lead to the COM terminal and the red test lead to the '+' terminal.

3. Connect the test leads to the circuit being measured and read the displayed resistance value.

Refer to Figure 16.

4. For Continuity measurements, an audible tone will sound when the reading is below 50Ω.

HOLD

1000A

OFF

3 4W

3 3W

600V CATMAX

Figure 16

382068-EU-EN-V4.0 12/11

Diode and Continuity Measurements

1. Connect red test lead to the "+" terminal and black test lead to the "COM" terminal.

2. Set the range switch to the diode test position " ".

3. Connect the red test lead to the anode side and black test lead to the cathode side of the

diode being tested.

4. Read the forward voltage value on LCD. The value for a good diode is 0.3VDC for

germanium diodes and 0.7VDC for silicon diodes.

5. If the test lead connection is reversed, the digital reading should reflect an open circuit

condition if the diode is good.

6. Continuity measurement: When the reading is below 50mV an audible tone will sound.

MIN/MAX Recording

1. Set the Function Switch to the Voltage or Current position.

2. To record and view MIN and MAX values while taking measurements, press the MIN MAX

button.

3. Now while measurements are being taken, the display only the MIN or the MAX reading. Use

the MIN MAX button to toggle between MIN and MAX readings. The LCD will display MIN or

MAX as selected.

4. To exit this mode, press and hold the MIN MAX button until the MIN and MAX display icons

disappear from the LCD.

Peak Detection

Peak Detect mode is used to capture fast transients signals (to 0.1ms) such as those caused by

motor startup surges or arc welding equipment switching.

1. Set the Function Switch to the Current or Voltage position.

2. Engage the Peak detector by pressing and holding the READ button until a short beep is heard.

(Note that if the button is held longer, a longer beep will sound and the meter will be in the

datalogging view mode; refer to the datalogging section for more info).

3. The LCD will display 'P-P+' when the Peak Detect mode is accessed correctly. Use the PEAK

button to toggle between ' P+ Max' (captures positive polarity peaks) and 'P- MIN' (captures

negative polarity peaks).

4. To exit the Peak mode, press and hold the PEAK button for two seconds (until the P- and P+

icons disappear).

5. Take a Voltage or Current measurement on a transient signal and the display will show the peak

of the pulse. The fastest surge the meter can detect is 0.1ms.

Data Hold

1. To freeze a displayed reading, press the HOLD key.

2. The HOLD icon will appear on the top of the LCD to let the user know that the meter is in the

Data Hold mode.

3. To return the meter to the normal operation mode, press the HOLD key again. The HOLD icon

will extinguish.

382068-EU-EN-V4.0 12/11

Datalogging

Single mode

1. Single mode datalogging records one reading at a time.

2. To record one reading, press the RECORD key until one beep heard. (Note that if the button is

held longer, 2 beeps will sound and the meter will be in continuous mode; see below). The

record number (1 through 25 or FULL) will briefly appear on the LCD.

3. The meter can store up to 25 readings. When the memory is full, FULL will display.

4. To view the readings, press and hold the READ button until two tones are heard. The second

tone is longer and louder than the first.

5. Now use the yellow and keys to scroll through the recorded readings.

Continuous mode (for use with PC interface only)

1. In continuous mode the meter records one reading after another automatically. Up to 4000

records can be recorded.

2. Press and hold the RECORD until two tones are heard (not available in 3φ3W and 3φ4W

function positions). The meter will begin recording data and the RECORD icon will appear on

the LCD.

3. To exit the Record mode, press and hold the RECORD button until the RECORD display icon

disappears.

4. Readings can only be transferred to a PC with optional Windows® software and interface cable.

Instructions for use are provided with optional software/hardware kit.

Clearing Datalog Data

1. Turn the meter off and hold down the RECORD button while turning the meter on.

2. Release the RECORD key when CLR appears. The datalog memory is now clear.

Maintenance

Battery Replacement

Warning: To prevent electrical hazard or shock, turn off the clamp meter

and disconnect the test leads before removing the back cover.

When the 9V battery expires, the LCD will display the battery icon. To replace the battery:

1. Set the Range switch to the OFF position.

2. Remove the meter's three rear screws and carefully open the meter housing.

3. Replace the 9V battery and re-assemble the meter housing.

Cleaning

Periodically wipe the case with a dry cloth; do not use abrasives or solvents.

382068 EU EN V4.0 Installation Directions

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