KROHNE 702 Level Radar User Manual BM702 MBA e

Krohne America Inc Level Radar BM702 MBA e

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Installation and operating instructions

Level-Radar

BM 702

2 Installation and operating instructions BM 702 (07/00)

Software History

Introduction Signal converter User program Instructions

Mth./Yr Hard-

ware Firmware Hard-

ware Operating

system Soft-

ware Device User

program

04/00 BM 702 7.00PREnn PC DOS 5.0

and higher PC-CAT

3.02

PRE01

05/00 7.02221.11+

Suppl.

instruction

Win95/98/NT PC-CAT

Win 4.00 Online help

Test versions for BM 702.

07/00 BM 702 7.00 PC DOS 5.0

and higher PC-CAT

3.01 07/00 7.02221.11+

Suppl.

instruction

Win95/98/NT PC-CAT

Win 4.00 Online help

First series version for BM 702.

Items included with supply

The scope of supply includes, in the version as ordered:

• Signal converter bolted to waveguide window and antenna; optionally: antenna

extension, sunshade (with fastening material in each case)

• Shielding material with tightening strap (not for the US market)

• Installation and operating instructions plus instruction card

• Report on factory settings for the signal converter

• Certification and approval documents, unless reproduced in the device documentation

Installation material (stud bolts, flange gasket and cabling) not supplied, to be provided by

customer!

3 Installation and operating instructions BM 702 (07/00)

Contents

1Handling and storage..................................................................................3

2Installation....................................................................................................4

2.1 Field assembly..................................................................................................4

2.2 Mechanical installation.....................................................................................5

3Electrical connection...................................................................................7

4Setting the parameters...............................................................................8

5Maintenance, error handling....................................................................18

6Safety information.....................................................................................19

7Technical data (extract)............................................................................20

8BM 702 Level-Radar Type code...............................................................22

9Parameter check list.................................................................................24

Product liability and warranty:

The BM 702 level gauge is designed solely for measuring the level, distance, volume and

reflection of liquids, pastes, slurries, particulate materials and solids.

The BM 702 level gauge does not form part of an overfill protection system as defined in

the WHG (= German water pollution regulation).

Local codes and regulations apply to its use in hazardous areas.

Responsibility as to suitability and intended use of these level gauges rests solely with the

user.

Improper installation and operation of our level gauges may lead to loss of warranty.

In addition, the "General conditions of sale", form the basis of the purchasing contract.

If you need to return the level gauge to the manufacturer or supplier, please refer to the

information given in Section 5

1 Handling and storage

Safety advice

Depending on the version, the device will weigh between approx. 5 kg and 30 kg. To carry,

use both hands to lift the device carefully by the converter housing. If necessary, use lifting

gear.

When handling the BM 702, avoid hard blows, jolts, impact, etc.

When storing the "Wave-Stick" version, make sure that the device is not placed on its side

on the PTFE antenna, as this may cause the rod to bend.

4 Installation and operating instructions BM 702 (07/00)

2 Installation

Most of the BM 702 versions are supplied in fully assembled condition. In this case, you

may skip this chapter. However, if a device should be delivered in parts, or parts are

subsequently replaced, the following should be noted.

2.1 Field assembly

• For any necessary field assembly of the

BM 702, all parts are included with the

supply (stud bolts, washers, etc.).

• Bolt the waveguide window (flange mount)

or distance piece, if supplied loose, to the

BM 702. Torque for the sets of 4 Allen

screws M (key size 5 mm): max. 8 Nm ∼

0.8 kpm (5.8 ft lbf).

• Note: Ensure the upper Teflon plug is kept

absolutely dry and clean! Moisture and dirt

will impair functionability of the BM 702!

• Bolt antenna extension to the antenna;

torque for the 3 stud bolts A: max. 8 Nm ∼

0,8 kpm (5.8 ft lbf).

Do not detach bolts H !

distance piece (for

high-temperature version

up to 250°C (482 °F)

upper Teflon plug

O-ring

lower Teflon plug

O-ring

BM70 A

connecting flange

antenna extension

antenna

signal converter

Version:

Flange

Stick plating

(for Hastelloy,

Stick

Gasket Gasket

Horn

antenna

Separation

(Metaglass)

Wave-Stick Wave-Stick

(PP or PTFE)

Flange system 96

with horn antenna

LP flange system

max. 2 bar

distance piece

(optional)

High temperature

plate Horn

antenna

Flange

Ti, Ta)

PTFE w/o plate

with horn antenna

BM 702

converter

5 Installation and operating instructions BM 702 (07/00)

2.2 Mechanical installation

Hazardous-duty systems:

• The BM 702 Ex is certified in conformity with European Standard

for use in Zone 0, 1

and 2 hazardous locations (dependent on version).

• Attention is drawn to the data and information given on the

nameplate of the

converter, the nameplate of the flange and the specifications in the

approval

certificates.

Safety:

• Check material compatibility of antenna, extension, flange, gaskets, and PP or PTFE

(used in all versions) with the product! See also section 8 "Type code"!

Mounting on the tank nozzle

a) Devices with horn antenna:

The antenna should project out of the nozzle. If necessary, use an antenna extension.

Exception: in case of a symmetrical tank fitting.

Tank nozzle Tank nozzle Antenna

extension

Tank nozzle

b) Wave-Stick

Note the requirements imposed on nozzle diameter and nozzle length:

min. 50 mm

min. 200 mm

Tank nozzle

e.g. DN50

dia. 40...55 mm

Version for

still wells

6 Installation and operating instructions BM 702 (07/00)

c) Purging device

Remove screw plug ¼" R and screw in

screwed tube joint, e.g. Ermeto ¼" R.

Consult “Ex“ specifications relating to the

purging circuit (provided by customer)!

Installation on the tank

• Do not forget the gasket when

positioning the BM

702 on the tank

nozzle flange. Align BM 702 and gasket,

slightly tighten nuts on stud bolts (by

hand).

• Press shielding strip C* in the gap

between tank and BM

702 flanges and

secure with strap retainer S* (both

items included with supply).

• Strap retainer S* must fit closely and

overlap both flanges.

* only required for European radio approvals

• Tighten down stud bolt nuts firmly. The

tightening torque is dependent upon

the strength properties of the stud

bolts and the pressure rating of the

tank C* = shielding strip B = BM 702 flange

S* = strap retainer F = tank flange

Positioning on the tank

>1/7×H, but max. 1/3×D H

Recommended distance Do not position in Do not position

from the tank wall tank centerline! above internals!

(multiple reflections!) (interference reflections!)

A Stilling well or Wave-Guide may be mounted in any position on the tank!

7 Installation and operating instructions BM 702 (07/00)

When using the PTFE Wave-Stick in hazardous areas of Zone 0, any electrostatic charging of

the stick, e.g. by flow of product, must be avoided!

3 Electrical connection

To open the signal converter, please use a screwdriver and release the four visible screws

on top of the blue housing.

Terminal assignment

BM 702:

The polarity of the 4-20 mA connection

is arbitrary. FE 1

4-20mA

current-

loop

cable gland

Equipotential bonding

When used in hazardous areas, the BM 702 Ex can be incorporated in the PA

equipotential bonding system, e.g. by using the separate U-clamp terminal at the “neck“

of the BM 702 Ex.

Rated temperature of connecting cables: see Section 6.

Supply voltage at the terminals (1,2)

The 4-20 mA supply must be able to provide the following voltage U at the terminals of the

BM 702 – dependent on the current I. Please consider also the line resistance and possible

loads on the secondary side of the supply unit.

4mA

12mA

8mA

16mA

20mA

3.6mA 22mA I

13V

14V

15V

16V

17V

The allowed upper limit R for load+line resistance is depending on the specification of the

supply unit:

U @20mA (supply unit) 14 V 15 V 16 V 17 V 18 V

Max. resistance R 50 Ω100 Ω150 Ω200 Ω250 Ω

8 Installation and operating instructions BM 702 (07/00)

BM702

9.500

Füll. m

m_____

4 4

4 Setting the parameters

Setting parameters via program PC-CAT

With the program PC-CAT, version 3.01 or higher, you can configurate BM 702 instruments

in a very comfortable way from a PC. Connect the non-intrinsically safe side of the isolation

amplifier over a load between 120 Ω and 350 Ω to the Smart adapter (delivered together

with PC-CAT) and connect it with a serial port of the PC.

The used isolation amplifier must be HART® compatible.

Local display (optional)

(1) Numeric display, measured values

(2) Alphanumeric display, function/unit

(3) 6 Markers to display measurement

status

(4) 4 keys for configuration and error

interrogation

Adapter

≥ 120 Ω

RS232

isolation

amplifier

9 Installation and operating instructions BM 702 (07/00)

Function of keys (only together with local display)

Operator control can be carried out with the aid of local display unit after opening the

housing. However, a particularly convenient form of parameter setting is offered by the PC

program PC-CAT (special accessories, see above).

→ (cursor key) - selects the configuration menu,

- branches the menu to the next lower level,

- shifts the cursor* to the next column on the right.

↑ resp. ↓ (select key) - branches the menu to the next digit on the same

level,

- changes the content (digit, text character) at the

cursor* position.

↵ (ENTER key) - branches the menu to the next higher level,

- stores newly entered parameters,

- executes displayed functions,

- selects special functions (e.g. error memory,

see Sect. 5).

* The cursor position is signalled by flashing of the character at the appropriate place.

Meaning of status markers (only for version with local display)

The 6 markers ? x below the local display only show information about the status of

measurement and are no error displays!

?1: No current measured value: The device is searching for a new value. If the

search for a plausible level fails for a certain time, "SIGNAL DOWN" appears as

error display.

? 2: Signal too strong: Mean of reflected microwaves is very high. Gain is automa-

tically stepped down.

? 3: Poor spectrum: Brief showing of this marker has no significance. If permanently

on, this may result in uncertain (incorrect) measured values or the error message

"NO M.VALUE".

? 4: No measured value as yet: Evaluable measured values not available after the

device has been started up. Measured value automatically set to the level of the

tank bottom. This marker disappears when the first valid measured value is

obtained.

? 5: Tank bottom: In tanks with dished bottom, for example, the measuring signal can

"disappear" if measurements are carried out near the bottom. The measured value

is then automatically set to the level of the tank bottom.

? 6: Measurement frozen: Device is in the block distance detection (see below).

10 Installation and operating instructions BM 702 (07/00)

Simply scaling the current output

1) Drain the tank completely to the 0% marking (= 4 mA) 1).

2) Press the lower keys (↵ und ↓) down, until the

asterisks on the display „TANKHEIGHT|********“ are

replaced by the actual measured distance value 2).

3) Then release and press ↵. In the lower line: „SURE

NO?“ is displayed.

4) If this value is not plausible or the tank is not empty,

abort by ↵. Or accept the value by pressing ↑ (“SURE

YES?”) and then ↵.

5) Now the tank height is set.

6) In the next step you can also enter this value as 4 mA

scaling (0%). Press ↵. In the lower line now: „SURE NO?“

is displayed again.

7) If this value shall not be stored, abort by ↵. Or accept

this 4mA scaling by pressing ↑ (“SURE YES?”) and then ↵.

8) Fill the tank to the 100% mark. Use the same procedure

for the 100% point = 20 mA only now by pressing the top

keys → and ↑ 1) 2).

9) First the measured distance can be taken as block

distance. After this you can enter or adjust the 20 mA point

(100%) according to the actual level.

1) This example was written for the case: current output = level (default). For distance measurement the

points 0% (short distance = high level) and 100% (large distance = low level) are exchanged

2) If no reliable measurement is possible „NO ACCESS“ is displayed. Abort by pressing ↵

TANKHEIGHT

1234 mm

↵

TANKHEIGHT

1234 mm

SURE YES? 1.

100%

BLOCKDIST.

567 mm

↵

TANKHEIGHT

1234 mm

SURE NO?

SCALE 4mA

0 mm

SURE NO?

SCALE 4MA

0 mm

SURE YES? 1.

SCALE 4mA

0 mm

↵

11 Installation and operating instructions BM 702 (07/00)

Description of functions

The table on the following 3 pages provides an overview of all parameters that can be set in

the configuration menu.

This is followed by more precise explanations of some functions and a typical configuration.

Configuration menu (version 7.00)

Function (Fct.) Input range Description

1.0 OPERATION

1.1 DISPLAY

1.1.1 FCT.DISP identical with 3.2.1

1.1.2 UNIT.LENGTH identical with 3.2.2

1.1.3 UNIT.CONV. identical with 3.2.3

2.0 TEST

2.1 HARDWARE

2.1.1 MASTER Master hardware test.

2.1.2 DISPLAY Display hardware test.

2.1.3 STATUS Status information for Service

2.2 CUR.OUTP.I

2.2.1 VALUE I Value display Display of actual value of the

current output.

2.2.2 TEST I Select 3.6 mA/4 mA/6 mA/...

... 20 mA/22 mA Output of selected value to

the current output. With

safety query.

2.4 FIRMWARE

2.4.1 MASTER Display Display of master firmware

version.

3.0 INSTALL.

3.1 BASIS.PARAM

3.1.1 TANKHEIGHT Select unit m/cm/mm/

inch/Ft

Enter 0.50 ... 20.00 [m]

Enter tank height (see

explanatory notes).

The unit entered here is also

used for all other length

entries.

3.1.2 BLOCKDIST Enter 0.10 [m] ... tank height Enter block distance = non-

measurable range below

bottom edge of flange (see

explanatory notes).

3.1.3 ANTENNA Select STANDARD

WAVE-STICK Select antenna type. WAVE-

STICK for all Wave-Stick

versions, except type "SW"

for stillwells.

All other = STANDARD.

3.1.4 ANT.EXTENS. Enter 0.00 [m] ... tank height Enter length of antenna

extension (not for Wave-

Stick: set to= 0)

3.1.5 DIST.PIECE Enter 0 ... 2000 [mm] Enter length of distance

piece above flange (high

temp. version = 120 mm).

3.1.6 STILLWELL Select NO / YES

If “YES“: enter 25 ... 200 [mm] Selection: without or with

still well.

With still well: enter inside

diameter in [mm]

12 Installation and operating instructions BM 702 (07/00)

Function (Fct.) Input range Description

(compensates different

wave speeds in still wells)

3.1.7 REF.OFFSET Enter -10.00...0...+10.00 [m] Reference offset is added

to measured distance

values.

3.1.8 TB.OFFSET Enter-100.00...0...+100.00 [m] Tank bottom offset is added

to measured level values.

3.2 DISPLAY

3.2.1 FCT.DISP Select LEVEL

DISTANCE

CONVERSION

Select function of display

(value to be displayed).

See also explanatory notes.

3.2.2 UNIT.LENGTH Select m/cm/mm/

inch/Ft/

PERCENT/BARGRAPH

Select unit for length value

to be displayed (only for

level and distance).

3.2.3 UNIT.CONV. Select m3/l(Liter)/US Gal/

GB Gal/Ft3/bbl/PERCENT/

BARGRAPH/USER UNIT

Select unit for conversion

value to be displayed

(“volume table“).

(see explanatory notes)

3.2.4 USER UNIT Text entry 10 characters Enter user-defined unit for

the conversion table.

3.2.5 ERROR MSG. Select NO/YES Select whether error

messages to be shown in

display.

3.3 SIGNAL OUT

3.3.1 FUNCTION I Select OFF/LEVEL/DISTANCE/

CONVERSION/SW.OUTP. Select function of the

current output.

3.3.2 RANGE I Select 4-20mA

4-20mA/E3.6

4-20mA/E22

Select range/error status

for the current output (hold

last value or 3.6 mA/22mA

in error status)

3.3.3 SCALE 4mA Enter -200.00 ... +200.00 [m]

0.00 ... 99999.99 [m3]Enter lower measuring

range value for the current

output (4 mA).

(see explanatory notes)

3.3.4 SCALE 20mA Enter -200.00 ... +200.00 [m]

0.00 ... 99999.99 [m3]Enter full-scale range value

for the current output (20

mA).

(see explanatory notes)

3.3.5 BAUDRATE Select 1200 Bd Baud rate for HART®

communication (do not

change!).

3.3.6 ADDRESS Enter 0 ... 255 Enter device address.

(for HART® multidrop)

3.3.7 PROTOCOL Select HART/KROHNE-PC Select communications

protocol

3.4 USER DATA

3.4.1 LANGUAGE Select GB-USA/D/F/I/E/P/S Select language for the

optional display.

3.4.2 ENTRY CODE 1 Select NO/YES Switch the access lockout

on/off.

13 Installation and operating instructions BM 702 (07/00)

Function (Fct.) Input range Description

If YES, for every access a 9-

digit entry code on the 4

keys is necessary.

3.4.3 CODE 1 Enter code (RRREEEUUU)Enter the entry code for

access lockout.

3.4.4 LOCATION Enter text (8 characters) Enter a device identifier.

3.5 APPLICAT.

3.5.1 AUTO TANKH. Special function Automatic determination of

tank height

(see explanatory notes).

3.5.2 EMPTY.SPEC. Select OFF/ON/

RECORD Recording the profile of the

empty tank (empty-tank

spectrum) (see explanatory

notes).

3.5.3 TIMECONST. Value 1...10...100 [s] Enter time constant for

measured-value filtering

3.5.4 TRACING.VEL. Value

0.01...0.50...10.00 [m/Min] Enter the maximum rate of

change in level that can

occur in operation.

3.5.5 MULT.REFL. Select NO/YES Switch the multi-reflection

identifier on/off.

3.5.6 BD-DETECT. Select NO/YES Switch the block distance

(overfill) identifier on/off

(see explanatory notes).

3.5.7 FUNCT. FTB Select OFF/

PARTIAL Select function of tank

bottom tracing system (see

explanatory notes).

3.5.8 EPSILON R Enter 1.1000 ... 8.0000 Enter relative permittivity of

product (only for Fct. 3.5.7)

3.5.9 TANKTYPE Select STORAGE T./

PROC TANK Select tank type.

STORAGE T. = smooth

product surface

PROC TANK = slightly

disturbed product surface

The default settings are marked in the table bold.

14 Installation and operating instructions BM 702 (07/00)

Explanatory notes

Tank height

The tank height (Fct. 3.1.1) for the BM 702 is defined as the distance between the top

edge of the tank connecting flange and the bottom reference point. The bottom reference

point is that “point“ in the tank on which the microwaves of the BM 702 hit and from which

they are reflected. This may be the tank bottom (symmetrical tank with flat bottom) or the

non-horizontal part of the bottom (e.g. tank with dished bottom) or an additionally fitted

plate. The BM 702 cannot measure below this point (“sump“ in the tank).

Note: When the tank is completely empty and the tank bottom provides good reflections

(flat, not dished bottom!), the tank height can also be automatically determined with the

aid of Function Fct. 3.5.1 AUTO TANKH. Before confirming, check carefully that the

proposed tank height is plausible!

Block distance

The “block distance“ function (Fct. 3.1.2) defines a zone below the top reference point in

which measurements are not meant to take place. The value should be at least 10 - 20 cm

greater than the length of antenna+antenna extension, or at least 20 cm in the case of the

Wave-Stick.

Signals within the block distance are suppressed; a rise in the tank filling above this limit

(response threshold) will lead to a measuring result corresponding to a distance = block

distance, when Fct. 3.5.6 BD-DETECT. is switched on.

Scaling of the current output

The scaling of the current output (Fct. 3.3.3: level 1 = 4 mA ; Fct. 3.3.4: level 2 = 20 mA)

should if possible lie within the measuring range (between bottom reference point and

response threshold).

By pressing the two upper keys (→ and ↑) or the two lower keys (↵ and ↓) at the same

time, the 0% setting (= 4 mA) or 100% setting (= 20 mA) can be programmed according to

the actual level (see page 9).

15 Installation and operating instructions BM 702 (07/00)

+Sump

non

measurable

zone

tank height

(Fct. 3.1.1)

Fct. 3.1.4

upper reference point

(top edge of tank connecting flange)

block distance (Fct. 3.1.2)

response

current output

max

(Fct. 3.3.4)

4min

(Fct. 3.3.3)

lower reference point

(tank bottom / datum point)

Fct. 3.1.5

threshold

measuring

[e.g.: 5.30 m]

[e.g.: 0]

[e.g.: 0.6 m]

[e.g.: 0.4 m]

[e.g.: 4.0 m]

range

Empty-tank spectrum

To enable the BM 702 to identify and blank out interference signals, e.g. caused by fixed

and moving tank internals, the tank profile (empty-tank spectrum) needs to be recorded

once only prior to (initial) start-up. For recording, the tank should be completely empty and

all moving parts (e.g. agitators) switched on. If major interference through internals is not

expected, recording of the empty-tank spectrum can also be dispensed with, since the

factory has already carried out and stored a partial empty spectrum of the flange system.

Empty-tank spectrum recording via display

After selecting menu item Fct. 3.5.2, press key →. The display then shows whether the

empty spectrum is currently ON or OFF. Then press the ↵ key if no change is to be made, or

use the ↑ key to choose between the following options:

• ON: the empty-tank spectrum is (again) switched on and taken into account for

measurements.

• OFF: the empty-tank spectrum is not taken into account for measurements, but

remains stored in the BM 702 and can be switched on again at a later date.

• RECORD: the existing empty-tank spectrum is to be deleted and a new one

recorded.

16 Installation and operating instructions BM 702 (07/00)

After selecting "RECORD": if other parameters had previously been changed, the query

"ACCEPT YES" is first made as to whether they are to be stored. In this case, confirm by

pressing ↵. To record, use the ↑ key to select one of the following options:

• MAX. VALUES: (only maximum values are taken into account when the empty-tank

spectrum is recorded; useful e.g. with “difficult“ agitators).

• AVERAGE: (values are averaged; this setting can be used for most applications).

After selecting with the ↑ key, press the ↵ key to select TOTAL or the ↑ key to select

PARTIAL.

• When TOTAL is selected, the empty-tank spectrum is recorded over the entire range

(tank height).

• If the tank has not been fully drained, the empty-tank spectrum can also be

recorded up to a certain distance, in which case the menu item PARTIAL should be

selected. When this has been selected, a query takes place by way of the ↵ key

concerning the distance value up to which the empty-tank spectrum is to be

recorded. The tank area below the current filling level is then excluded from the

empty-tank recording. It is recommended to maintain a safety distance of 20 to 30

cm from the actual product distance.

Subsequently press key ↵ to start recording the empty-tank spectrum. The display starts

with “200“ and counts down to “0“. The sign WAIT... is shown in the display. READY

appears after approx. 1-3 minutes. Then press key ↵ five times to store the recorded

empty-tank spectrum, which is taken into account for measurements.

Empty-tank spectrum recording via PC-CAT

Connect the BM 702 and press in the display mode of PC-CAT the key combination Ctrl-L.

The type of empty-tank spectrum can be selected by one of the following keys:

1: Max.Values 4: Max. Partial A: Break

2: Average 5: Avg. Partial

Tank bottom tracing mode (FTB)

The BM 702 includes an additional function for measuring reliably low levels in tanks with

flat bottom and poorly reflecting products (low dielectric constant). This tank bottom tracing

system (abbreviated FTB) is activated in the vicinity of the tank bottom (max. 20% level).

Given higher levels, the normal measuring method is used (reflection from the product

surface).

If the measurement jumps to the correct level only after filling above a certain level (approx.

0.3-1.0 m), you can activate the FTB function Fct. 3.5.7 „PARTIAL“. The relative permittivity

εr of the tank product must be set in Fct. 3.5.8. If it is not known, enter the figure of 2.0.

Since the exact position of the tank bottom must be known for this process, it is advisable

when using the FTB to determine the tank height automatically with an empty tank, using

Fct. 3.5.1.

Conversion table/Volume table

A table consisting of a maximum of 50 points can be stored in the BM 702 for non-linear or

linear conversion of the level, e.g. into a volumetric value. This table, however, can only be

programmed with the PC-CAT program (Fct. 3.7.2).

17 Installation and operating instructions BM 702 (07/00)

Sequence for setting parameters (example) (for version with local display)

The following description refers to a storage tank with the parameter examples taken from

the illustration in this Section. If the device no longer contains the default parameters, the

keystroke combination for entering the numerical values may differ.

Activity Keys to be

actuated

Content of BM 702

display after activity

Entry into configuration menu →Fct. 1.0

OPERATION

Setting the parameter: tank height ↑ ↑ → → Fct. 3.1.1

TANKHEIGHT

Display of default value →10.000 m

Input of tank height "5.30 m" →↓ → 5x↑ →

↑

05.300 m

Confirm tank height and move to block

distance

↵ ↑ Fct. 3.1.2

BLOCKDIST

Display default value →0.5000 m

Enter block distance "0.60 m" → ↑ 0.6000 m

Confirm block distance and move to current

output configuration

↵ ↵ ↑ ↑ Fct. 3.3

SIGNAL OUT

Move to lower range value → ↑ ↑ Fct. 3.3.3

SCALE 4 mA

Display default value →+ 00.000 m

Enter lower range value (0.4 m = 4 mA) 3x → 4x↑ + 00.400 m

Confirm lower range value and move to full-

scale range value

↵ ↑ Fct. 3.3.4

SCALE 20mA

Display of default value →010.00 m

Enter full-scale value (4.0 m = 20 mA) 2x→ ↓ → 4x↑004.00 m

Confirm full-scale value and move to empty

tank spectrum

↵ ↵ ↑ ↑ → ↑ Fct. 3.5.2

EMPTY.SPEC.

Select: re-record empty spectrum → ↑ ↑ RECORD

Store changed parameters ↵ACCEPT. YES

Confirm and select: averaging ↵ ↑ AVERAGE

Confirm and start recording; then wait for

approx. 1-3 minutes!

↵ ↵ READY

Confirm and move to tank type ↵ 7x↑Fct. 3.5.9

TANK TYPE

Display of default value →PROC TANK

Select tank type "storage tank" ↑ ↑ STORAGE T.

Return to measurement function with

confirmation of changed parameters 5x↵PARAM.CHECK,

then START,

then meas.val. display

18 Installation and operating instructions BM 702 (07/00)

5 Maintenance, error handling

Replacement of the signal converter

Before commencing, note the parameters of the BM 702 and switch off the power supply!

1. Disconnect all cables from the terminals in the terminal compartment.

2. Remove the 4 Allen screws M (Allen key size 5 mm) and lift off the signal converter.

The flange unit (incl. waveguide window) will remain tight even with pressurized tanks.

Caution

On pressurized tanks, do not on any account remove the 4 screws H connecting the

waveguide window to the BM 702 flange! DANGER!

3. Fit the new BM 702 converter.

4. Reconnect all cables in the terminal

compartment, as described in Section

5. Check against the enclosed report on

settings whether the factory-set

parameters are correct for your

application. If not, reset.

6. Record the empty spectrum,

see Section 4.

Important: Make sure that the screw thread

of the covers on the terminal and electronic

compartments is well greased at all times.

distance piece

(for hightemperature

version up to 250°C (482°F)

O-ring

BM70

connecting flange

signal converter

Returning a BM 702

The party returning a device is obligated to check and ensure that all cavities in the device

are free from dangerous substances (toxic, caustic, flammable, water-endangering), and

that a certificate is enclosed with the device confirming that it is safe to handle.

Error display during measurement (only for versions with local display)

When function 3.2.5 "ERROR. MSG." is set to YES, any error occurring during measurement

is indicated in the display and alternates with the measured value for as long as the error is

present.

In addition, all errors are stored. Press the keystroke combination ↵ ↑ → → to get into

the error list. You can page through the list with key → , and acknowledge the errors at the

end - if required - by "QUIT YES". Press key ↵ twice to return to the measuring mode.

Fatal errors (FATAL ERROR), that are detected when the device is started up, render

operation of the BM 702 impossible.

19 Installation and operating instructions BM 702 (07/00)

6 Safety information

iHazardous-duty systems

• Types of protection in the BM 702 terminal compartment:

Intrinsically safe"ia"

• Consult the relevant wiring and installation regulations, e.g. VDE 0165, before

mounting, dismantling or making electrical connections in a hazardous area

Temperature rating of connecting cables:

The temperature rating of connecting cables is dependent on the maximum temperature of

the flange:

Version Max. flange

temperature Cable temperature

rating

Without high temperature ≤ 100°C (212°F) 70°C (158°F)

distance piece > 100°C (212°F) 80°C (176°F)

With high temperature ≤ 200°C (212°F) 70°C (158°F)

distance piece > 200°C (212°F) 80°C (176°F)

20 Installation and operating instructions BM 702 (07/00)

7 Technical data (extract)

Tank height (measuring range) 0.5 to 20 m / 1.6 to 65.6 ft

Measuring accuracy (distance) from 1m/3ft: + 1cm/0.4” ; from 5m/16ft: + 0.2%

Measured-value resolution 1 mm / 0.04”

Rate of change in level max. 10 m/min / 32.8 ft/min (tracking speed)

Connecting flanges

Horn antenna/Wave-Guide DIN 2501 DN 50 to DN 200 / PN 6 to PN 64 and

higher;

Shape C to DIN 2526 or others

ANSI B16.5 2” to 8",

Class 150 lb or 300 lb, RF

Wave-Stick DN 50...150 or ANSI 2”...6”, dairy DIN 11851

DN 50/65/80, Tri-Clamp 2/3/4”,

SMS 51/63/76 mm, G 1½"

Max. allowable operating pressure -1 bar (vacuum) to max. 64 bar / 928 psig,

depending on version and flange pressure rating.

(see name plate)

LP flange system with horn antenna, Wave-Guide or Wave-Stick without flange plate

-1 bar (vacuum) to +2 bar /29 psig

V96 flange system with horn antenna or Wave-Guide:

Connection:

nominal dia. Flange rated pressure

PN 16 PN 25 PN 40 PN 64

DN inches bar psig bar psig bar psig bar psig

80 3 16 232 --- --- 40 580 64 928

100 4 16 232 --- --- 38 551 55 797

150 6 16 232 --- --- 34 493 47 681

200 8 16 232 25 362 32 464 45 652

Wave-Stick: max. 16 bar / 232 psig, temperature-dependent:

-20 +150+100

-1

+16 46 - 0.3·T[°C] bar

temperature T

pressure

+232

[psig] [bar]

+14

-14

+212

+302°F

745 - 2.42·T[°F] psig

21 Installation and operating instructions BM 702 (07/00)

Operating temperature at flange LP flange system: -20°C (-4°F) to +130°C (302°F)

(see also chapter 8) V96 flange system:

Basic version: -30°C (-22°F) to +130°C (266°F)

Special version: min. -60°C (-76°F)

High temperature version, FFKM:

max. +250°C (482°F)

Kalrez 2035: max. +210°C (410°F)

FPM (Viton) or FEP-coated: max. +200°C (392°F)

PTFE-Wave-Stick: -20°C (-4°F) to +150°C (302°F),

pressure dependent

PP-Wave-Stick: -20°C (-4°F)to +100°C (212°F)

Product temperature Unrestricted, provided ambient temperature and flange

temperature are within the specified limits

Ambient temperature Signal converter (Tamb): -40°C (-4°F) to +55°C (131°F)

Microwaves

Measuring principle FMCW Radar

Frequency range X-Band 8.5 - 9.9 GHz

Antenna radiation angle Type 3: ± 8° Type 4: ± 6° Wave-Stick: ± 9°

Ex-i current output HART® (passive)

Current 4 - 20 mA; without or with error message 3.6 mA

or 22 mA

Accuracy and linearity 0.15 %; TC=100 ppm/K

clamp voltage > 17V (I = 4 mA); > 13V (I = 20 mA)

Digital communication HART®

Ambient conditions

Environment class Locations exposed direct to open-air climate,

D1 Severity in conformity with EN 60654-1

Protection category (converter) IP66 / IP67 (equivalent to NEMA 4 and 4X)

Electrical connection

Cable entries: 1 x M 20×1.5

(delivered with 1 cable gland M 20 mm or

QUICKON® 2-pole cutter clamp)

Terminals: Cable cross-section 0.5-1.5 mm² (AWG 20-16)

U-clamp terminals (for PA and FE) cable cross-section max. 4 mm² (AWG 12)

22 Installation and operating instructions BM 702 (07/00)

8 BM 702 Level-Radar Type code

Series V96 or LP:Series WS:

Marking of the signal converter (see name plate):

BM 702 non-Ex version for non-hazardous areas

BM 702i / EEx Ex version for hazardous areas,

terminal compartment in Increased Safety „ia“

Marking of the Flange systems (see name plate on flange):

..(1).. ....(2)...... non-Ex version for non-hazardous areas

..(1).. ....(2)...... – E Ex ..(3).. Ex version for hazardous areas

(1) Series

V96 Flange system V96

(with „Metaglass“ as versions with horn antenna or Wave-Guide)

WS Wave-Stick

(plastics rod antenna or short stick for still wells)

EA Enamel antenna

LP LP version

(with horn antenna or Wave-Guide)

(2) Materials of the parts in contact with the product

- Series V96:

» Antennas and flanges:

SS Flange and antenna of stainless steel

used material: see marking on flange

HB Flange plating and antenna of Hastelloy B (e.g. B2)

used material: see marking on plating

HC Flange plating and antenna of Hastelloy C (e.g. C4 or C22)

used material: see marking on plating

Ti Flange plating and antenna of Titanium

Ta Flange plating and antenna of Tantalum

Mo Flange plating and antenna of Monel

» gasket material:

xxx

Name plate

Flange system

Flange material

Material "Metaglass" ring

High temperature distance piece

(optional)

Flange plating

(for Hastelloy, Ti, Ta)

Marking

Flange plating

(for Hastelloy)

Terminal cover

(not for LP version)

xxx

Name plate

Flange system

Flange material

optional: flange plate

(Vers. LPTFE/PTFE)

optional: antenna

(LP horn antenna)

Stick

(LPTFE/PTFE/PP)

Marking

Terminal cover

23 Installation and operating instructions BM 702 (07/00)

FFKM Gaskets of FFKM, e.g. Kalrez™ 4079 or Parofluor™ V8545-75

K2035 Gaskets of Kalrez™ 2035

K1091 Gaskets of Kalrez™ 1091

FPM Gaskets of FPM, e.g. Viton™

FEP Gaskets FEP-coated (FPM core)

- Series WS

LPTFE Stick and flange plate of conductive PTFE

PTFE Stick and flange plate of PTFE

SS PTFE stainless steel PTFE, gasket of FFKM

also for version „LP horn antenna“

SS PP stainless steel PP, gasket of FPM (Viton™)

- Series EA

EM PTFE Antenna of enamel, sealing of PTFE

(3) Application conditions, equipment group II

(explosive atmosphere by gases, vapours, mists)

1G equipment category 1, application in Zone 0

(versions V96, EA, or Wave-Stick LPTFE or PTFE with Metaglass)

2G equipment category 2, application in Zone 1

(Wave-Stick PP or PTFE without Metaglass, or LP flange system)

(free) Without Ex approval (e.g. LP version)

Limits of temperature at flange:

Version Minimum flange temperature Maximum flange temperature

(1)+(2) of the

type code Standard

version Special version

with marking

„2.4610“ at the

Metaglass ring

Without high

temperature

distance piece

With high

temperature

distance piece

V96 ... FFKM -30°C (-22°F) -60°C (-76°F) +130°C (+266°F) +250°C (+482°F)

V96 ... K2035 -30°C (-22°F) -60°C (-76°F) +130°C (+266°F) +210°C (+410°F)

V96 ... FPM -30°C (-22°F) -60°C (-76°F) +130°C (+266°F) +200°C (+392°F)

V96 ... FEP -30°C (-22°F) -60°C (-76°F) +130°C (+266°F) +200°C (+392°F)

WS LPTFE -40°C (-40°F) ––– +130°C (+266°F) +150°C (+302°F)

WS PTFE -40°C (-40°F) ––– +130°C (+266°F) +150°C (+302°F)

WS SS PTFE -20°C (-4°F) ––– +130°C (+266°F) +150°C (+302°F)

WS SS PP -20°C (-4°F) ––– +100°C (+212°F) +100°C (+212°F)

LP -20°C (-4°F) ––– +130°C (+266°F) –––

24 Installation and operating instructions BM 702 (07/00)

9 Parameter check list

BM 702 ..................................Vers.:......................device no..................................

Menu modified at.......................................:.................:.................:.................:

Fct. Configuration parameters (extract)

3.1.1 Tank height.......................................:.................:.................:.................:

3.1.2 Block distance..................................:.................:.................:.................:

3.1.3 Antenna............................................:.................:.................:.................:

3.1.4 Antenna extension.............................:.................:.................:.................:

3.1.5 Distance piece..................................:.................:.................:.................:

3.1.6 Stillwell / diameter............................:.................:.................:.................:

3.1.7 Reference offset................................:.................:.................:.................:

3.1.8 Tank bottom......................................:.................:.................:.................:

3.3.1 Current output, function offset............:.................:.................:.................:

3.3.2 Current output range/error.................:.................:.................:.................:

3.3.3 Min. current scale..............................:.................:.................:.................:

3.5.2 Empty spectrum................................:.................:.................:.................:

3.5.3 Time constant...................................:.................:.................:.................:

3.5.4 Tracking speed..................................:.................:.................:.................:

3.5.5 Multiple reflections (yes/no)..............:.................:.................:.................:

3.5.6 Block distance ident (yes/no)............:.................:.................:.................:

3.5.7 Function FTB.....................................:.................:.................:.................:

3.5.8 Epsilon R..........................................:.................:.................:.................:

3.5.9 Tank type..........................................:.................:.................:.................:

KROHNE 702 Level Radar User Manual BM702 MBA e

Krohne America Inc Level Radar BM702 MBA e

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