KROHNE BM 70 A Manuel utilisateur

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Condensed instructions

Level-Radar

BM 70 A

GR/OP

DIN: 7.02225.31.00

KROHNE 06/1997 US: 7.02225.71.00

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Table of contents:

1. Transport and storage

2. Installation

2.1Fieldassembly

2.2 Mechanical installation

3. Electrical connection

4. Setting parameters

5. Maintenance, error handling

6. Technical data

7. Safety information

Product liabilityand warranty:

The BM70 Alevel gauge is designed solely for measuring the level,distance,

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

The BM70 Alevel gauge does not formpart of an overfill protection systemas

defined in WHG.

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

Responsibilityastosuitabilityand 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", forming the basisof the purchasing

contract, are applicable.

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

the information given in Section 5.

Items included with supply

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

•Signal converter bolted to waveguide windowand antenna; optionally: antenna

extension, sunshade (with fastening material in each case)

•Shielding material with tightening strap

•Device documentation (installation and operating instructions) plus instruction

card, and also these condensed instructions

•Report on factory settings for the signal converter

•Certification and approval documents, unless reproduced inthe device

documentation

•Bar magnet for operator control

•Wrench for covers

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

provided by customer!

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1. Handling and storage

Safety advice

Depending on the version, the device will weigh between approx. 16 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 70 A, 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.

2. Installation

2.1 Field assembly

Most of the BM 70 A versions are supplied in fully assembled condition. However, if

a device should be delivered in parts, or parts are subsequently replaced, the

following should be noted.

•For any necessary field assembly of the

BM 70 A, 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 70 A. 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 70 A!

•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 !

Distanzstück

(für Hochtemperatur-

Ausführung bis 250°C)

oberer Teflonstopfen

O-Ring

unterer Teflonstopfen

O-Ring

BM70

Anschlussflansch

Messumformer

Antennenverlängerung

Antenne

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2.2 Mechanical installation

Hazardous-duty systems

•The BM 70 A Ex is certified in conformity with European Standard for use in

Zone 0, 1 and 2 hazardous locations (Wave-Stick: Zones 1, 2 to PTB, Zone 0 to

SEV).

•The BM 70 A Ex is approved for use in dust locations of Zones 10 and 11 (but

not the Wave-Stick).

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

specifications in the approval certificates.

Safety

•Surface temperature: The housing of the signal converter can, in extreme

ambient conditions, assume temperatures of more than 70°C!

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

(used in all versions) with the product!

Mounting on the tank nozzle

Devices with horn antenna:

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

extension.

Tankstutzen

Tankstutzen Antennen -

Verlängerung

Wave-Stick

Note the requirements imposed on nozzle diameter and nozzle length:

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min. 50 mm

min. 235 mm

Tankstutzen

Ausführung SW

für Schwallrohre

Ø 40...55 mm

z.B. DN50

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 (connection provided

by customer)!

Ultimate installation on the tank

•Do not forget the gasket when

positioning the BM 70 A on the tank

nozzle flange. Align BM 70 A and

gasket, slightly tighten nuts on stud

bolts (by hand).

•Press shielding strip C* in the gap

between tank and BM 70 A 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 70 A flange

S* = strap retainer F = tank flange

3. Electrical connection

To open the terminal compartment of the signal converter, first open the safety lock

with an Allen key (size: 4 mm) and then use the enclosed special wrench to turn the

cover anticlockwise.

Supply power variants

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Variant Voltage range Recommended fuse protection for

cables

24 V DCAC 18-31.2 V DC

18-26.4 V AC min. T 2 A

115/230 V AC

switch-selectable between:

85-127 V AC or

170-254 V AC 115 V AC: min. T 0.5 A

230 V AC: min. T 0.25 A

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Signal output variants

Variant Comments

Ex-e current output HART®Ex-e; with switching output and digital input

Ex-i current output HART®intrinsically safe; passive

Current output Ex-e; not communicable

RS 485 + current output BM70 A protocol or ModBus-RTU; Ex-e

PROFIBUS FMS/DP RS485 interface; Ex-e; see Add’l Instructions

PROFIBUS PA intrinsically safe; see Add’l Instructions

Terminal assignment

Supply power:

Ein- und Ausgänge

+(-) -(+)24V DC

24V AC FE

Ein- und Ausgänge

Connections for 115/230 V AC Connections for 24 V DC/AC (any

polarity) Connection of a functional ground FE is not

mandatory.

Current output HART®, Ex e: Ex-i current output HART®:

32 31

42 41

Strom-

ausgang

Schaltausgang

max. 100mA/30V DCAC

Digital-

Eingang

82 81

-+-+

5...28V= 4-20mA

max.500 Ω

32 31

Ex-i-Speise-

für externe

Einheit

U max.= 30V

Ex-i-Kreise

Strom-

ausgang

4-20mA

U min.= 8V

The 4 other terminals can be used for looping-through

external intrinsically safe circuits.

Current output

QRQFRPPXQLFDEOH

: RS485 version (Ex-e):

32 31

Strom-

ausgang

nicht belegte

Anschlüsse

4-20mA

max.250 Ω

BBAA

RS 485

Ein

RS 485

Ausgang

32 31

Strom-

ausgang

4-20mA

max.250 Ω

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Class of protection

The BM 70 A level gauge is designed for safety class 1 in conformity with VDE

0106 Part 1.

24 V DCAC supply

When connected to a “functional extra-low voltage with safety separation“

power source (SELV or PELV) in accordance with VDE 0100, Part 410 or equivalent

(inter)national regulations, connection of a safety conductor (PE) is not required.

115/230 V AC supply

Connection to a power source with dangerous contact voltage: if due to protective

measures in conformity with VDE 0100 a safety conductor PE is stipulated, it must

be connected to the separate U-clamp terminal in the terminal compartment of the

signal converter.

Equipotential bonding

When used in hazardous areas, the BM 70-Ex A must be incorporated in the PA

equipotential bonding system , irrespective of the type of power supply! If the PA

is connected via a separate conductor, this must be connected to the separate U-

clamp terminal at the “neck“ of the BM 70-Ex A. Cancellation of equipotential

bonding is only permitted when the BM 70 A is disconnected from supply.

Rated temperature of connecting cables: see Section 7.

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4. Setting the parameters

Local display

Function of keys

Operator control via the keys: For reasons of electrical safety, the keys (below the

display, when housing is open) may only be actuated for servicing and repair work

by specialist personnel, on no account, however, when there is risk of explosion!

Operator control can be carried out with the aid of the supplied bar magnet without

opening the housing. However, a particularly convenient form of parameter setting is

offered by the PC program PC-CAT (special accessories), which allows input via

masks at the computer: see PC-CAT user manual.



(cursor key): - selects the configuration menu,

- branches the menu to the next lower level,

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



(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 or the option at the appropriate place.

Description of functions

The table on the following 2 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.



Numeric display, measured values

Alphanumeric display, function/unit

6 Markers to display measurement

status

3 keys for configuration and error

interrogation

Magnetic sensors for operator control

through the closed housing (function

same as the 3 keys)

Compass field, indicates actuation of a

key

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Configuration menu (Version 3.00)

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 2 mA/4 mA/6 mA/...

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

output. With safety query.

2.3 SW.OUTP.

2.3.1 TEST S Select OPEN/CLOSE Switch switching contact on/off.

With safety query.

2.4 FIRMWARE

2.4.1 MASTER Display Display of master firmware version.

2.4.2 DISPLAY Display Display of display firmware version.

3.0 INSTALL.

3.1 BASIC.PARAM

3.1.1 TANKHEIGHT Select unit m/cm/mm/

inch/Ft

Enter

0.00 [m] ... max. tank height

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.

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

3.1.5 DIST.PCE. Enter 0 ... 2000 [mm] Enter length of distance piece above

flange.

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].

3.1.7 REF.OFFSET Enter -10.00...0...+10.00 [m] Reference offset (special function).

3.1.8 TKB.OFFSET Enter -100.00...0...+100.00 [m] Tank bottom offset (special function).

3.2 DISPLAY

3.2.1 FCT.DISPLAY Select LEVEL

DISTANCE

CONVERSION

REFLECTION

Select function of display

(value to be displayed).

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 SIG.OUTP.

3.3.1 FUNCTION I Select OFF/LEVEL/Select function of the current output.

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