KROHNE BM 70 M Series Installation And Operating Instructions Manual
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KROHNE BM 70 M Series Installation And Operating Instructions Manual

KROHNE BM 70 M Series Installation And Operating Instructions Manual

Inclusive part 2
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©
KROHNE 08/2002
7.10027.21.00
GR
Installation and
operating instructions for
BM 70 M
Inclusive Part 2
Supplementary Installation and
operating instructions for
BM 70 M-EEx / BM 70 Mi-EEx
Variable area flowmeters
Vortex flowmeters
Flow controllers
Electromagnetic flowmeters
Ultrasonic flowmeters
Mass flowmeters
Level measuring instruments
Communications engineering
Engineering systems & solutions
Switches, counters, displays and recorders
Heat metering
Pressure and temperature

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Summary of Contents for KROHNE BM 70 M Series

  • Page 1 © KROHNE 08/2002 7.10027.21.00 Installation and operating instructions for BM 70 M Inclusive Part 2 Supplementary Installation and operating instructions for BM 70 M-EEx / BM 70 Mi-EEx Variable area flowmeters Vortex flowmeters Flow controllers Electromagnetic flowmeters Ultrasonic flowmeters Mass flowmeters...

  • Page 2: Table Of Contents

    Part 1: Installation and operating instructions for BM 70 M Range of applications..............................5 Mode of operation and system structure........................5 Operating principle (FMCW-Radar) ..........................5 Signal processing (digital) ..............................6 Modularity (signal converter, flange, antenna) ........................7 Input ....................................7 Measured variable (distance, level, volume, reflection) ....................
  • Page 3 Design .................................... 24 Dimensions and weights ..............................24 Replacement of the signal converter ..........................25 Field assembly ................................26 Materials of construction ..............................26 7.4.1 Signal converter ................................26 7.4.2 Flange system................................. 27 7.4.3 Seals and gaskets................................27 Process connection................................. 27 Electrical connection ...............................
  • Page 4 General advice on safety Weight: the device will weigh between approx. 55 kg (120 lb) and 70 kg (155 lb) or more! To carry, use both hands to lift the device carefully by the converter housing. If necessary, use lifting gear. Avoid hard blows, jolts, knocks, impacts, etc.

  • Page 5: Range Of Applications

    Range of applications The BM 70 M Level-Radar level gauging system is designed to measure the distance, level, volume and reflection of liquids, pastes, slurries, solids and particulate materials. BM 70 M Ex hazardous-duty versions are suitable for use in Ex-Zone 0, 1 and 2. Mode of operation and system structure Operating principle (FMCW-Radar) A radar signal is given via an antenna, reflected on the measuring surface and received after a...

  • Page 6: Signal Processing (Digital)

    As the transmit frequency is changed during a short time interval by FMCW radar the transmitted frequency has to follow the nominal frequency within micro seconds. This ensues via modern, fast electronic and processors. PLL structure Microprocessor Reference control oscillator Microwave Phase oscillator...

  • Page 7: Modularity (Signal Converter, Flange, Antenna)

    Modularity (signal converter, flange, antenna) The measuring system consists of the flange system and the signal converter. The flange system contains the microwave window separating product from pressure, and the antenna system. The compact signal converter contains the microwave generator and the entire signal processing system, including provision of a standardised output signal (4 - 20 mA or digital interface).

  • Page 8: Block Distance

    Block distance The block distance is the minimum measured distance between the mounting flange (reference point) and surface of the tank product. Recommended minimum values: Block distance Maximum level Horn antenna without stilling well Stilling well / Wave-Guide Antenna size * = Type1: 11cm/4"; Type2: 15cm/5.5";...
  • Page 9 Digital input (terminals 81/82): Can be used to suspend the entire measurement procedure, i.e. measurements are "frozen" (standard setting), or to hot start the device (reprogramming by KROHNE Service). Applicable voltage 5...28 V DC Input resistance >...

  • Page 10: Ex-I Current Output Hart (Type Of Protection: Ex De [Ia])

    ® Ex-i current output HART (type of protection: Ex de [ia]) Function Level, distance, volume (conversion table) or reflection; and error identification; passive output (current sink) Current 4-20 mA; without or with error message (3.6 mA / 22 mA); ® 4 mA constant, adjustable for HART -Multidrop Temperature drift...

  • Page 11: Current Output (Non-Communicable)

    Transmission rate 1200 to 38400 bauds Address 0 to 255 ® Protocols KROHNE Protocol, HART , Modbus RTU (from firmware V.3.02/4.02) Additional information: see "BM 70 A/P Communication RS 485" instructions. Additional current output The current output is conductively coupled to the RS 485 interface.

  • Page 12: Breakdown Signal

    If other devices are operated together with the BM 70 M Level-Radar on one bus, all devices must use the same Communications protocol (e.g. ModBus devices of different makes or BM 70 M and MTM 70 with KROHNE Protocol). •...

  • Page 13: Digital Input

    Digital input The digital input (for electrical data: see Section 4.2) can be used for temporarily "freezing" measurements or for carrying out a hot start. It is only available in the "Ex-e current output ® HART " version. The "freeze" function can be used to blank out larger, temporary interferences, e.g. very slow agitator, slide gate, ball valve in the stilling well.

  • Page 14: Repeatability

    Repeatability Repeatability is equal to half the value for the error of measurement. Measured value resolution/hysteresis Measured value resolution is 0.1 mm / 0.004" for BM 70 M. Hysteresis is at least 20 times less than the error of measurement. Transient recovery time The transient recovery time is determined by the setting parameter "time constant"...

  • Page 15: Installation Conditions

    Safety: • Operator control via the keys: on electrical safety grounds, operator control of the keys (below the display, with the housing open) may only be carried out by specialist personnel for service and repair work, on no account, however, when there is risk of explosion! •...
  • Page 16 If these recommendations cannot be followed because of the tank geometry, please consult KROHNE. B) Stilling well or Wave-Guide A stilling well or Wave-Guide may be mounted in any position on the tank. (For design layout: see also Section 6.1.4; for block distance: see Section 3.3).

  • Page 17: Mounting On Tank Fitting

    6.1.3 Mounting on tank fitting A) Horn antenna Should be mounted on the tank fitting as close to the horizontal as possible (deviation < ± 2°). Exception: if product surface is not horizontal, (e.g. particulate materials) the flange can be aligned roughly parallel to it.

  • Page 18: Mounting On Stilling Wells/ Trunks

    B) Solid antenna 800 mm 6.1.4 Mounting on stilling wells/ trunks Antenna Type Outside diameter 76 mm (2.99”) 100 mm (3.94”) 140 mm (5.51”) 152 mm (5.98”) 200 mm (7.87”) If necessary, turn antenna to size! Further requirements on stilling wells: •...

  • Page 19: Wave-Guide

    If necessary, several holes can be drilled along the whole length of the pipe. All holes must be deburred. The holes should be as small as possible and spaced wide apart (Recommendation: see drawing below). Ø max. 10 mm / 0.4’’ min.

  • Page 20: Curved Antenna Extensions

    6.1.6 Curved antenna extensions Rectangular and S-shaped extensions are available for particularly difficult operating conditions. Such extensions can be used in cases where the antenna is exposed to especially high temperatures and where there are problems of space, (e.g. to avoid internals; positioning the antenna away from the centre of symmetry;...

  • Page 21: Ultimate Installation On The Tank

    Antenna heating/cooling device Purging device (> DN150/6") (> DN100) Hazardous-duty systems: If a liquid is used for purging, this may interfere In Zone 0, the temperature of the heating with the functioning of the BM 70 M during the system and antenna may not exceed 80 % of process.

  • Page 22: Ambient Temperature Limits

    6.2.4 Ambient temperature limits Signal converter: min. - 40°C (-40°F) Measuring function OK, but LCD "freezes up" max. +70°C (+158°F) Functional upper limit, for max. 2 hours Flange system: see Section 6.2.3 6.2.5 Storage temperature -20 ... +60°C (-4 ... +140°F) 6.2.6 Environment class Locations exposed direct to open-air climate, D1 Severity in conformity with EN 60654-1 6.2.7 Protection category...

  • Page 23: Relative Permittivity (Ε ≥ 1.5)

    ≥ 1.5) 6.3.2 Relative permittivity (ε The (relative) permittivity of the product (ε , Epsilon-R) determines the strength of the reflected signal. Measurement results are not affected so long as the reflected signal is strong enough, but reliability and the maximum measuring range are dependent upon the relative permittivity. At ε...

  • Page 24: Maintenance

    Maintenance Cleaning the antenna Particular process applications can cause severe contamination of the antenna. Microwaves cannot be properly emitted or received when reflected from deposits on the antenna. In such cases, the BM 70 M will usually indicate maximum level (volume) or minimum distance. The level of contamination at which such errors occur depends firstly on the product concerned, and secondly on the reflection index, which is mainly determined E\WKHUHODWLYHSHUPLWWLYLW\0 Regular cleaning, or use of the purging device (see Sect.

  • Page 25: Replacement Of The Signal Converter

    Weights: Meter size Standard antenna Length Weight ∅A (mm) ∅A (“) DN (mm) ANSI (“) Type f (mm) f (“) 7.87 19.19 66.14 2.99 16.54 39.68 3.94 24.41 41.89 5.98 32.28 55.12 7.87 32.28 70.55 * Hastelloy: + 30 mm (1.12”) Replacement of the signal converter Always disconnect from power source before commencing work! Hazardous-duty systems...

  • Page 26: Field Assembly

    Field assembly • When the BM 70 M needs to be field assembled, all required parts are included with the supply (stud bolts, washers, etc.). • If supplied loose, bolt the waveguide window (flange assembly) or the distance piece to the BM 70 M.

  • Page 27: Flange System

    7.4.2 Flange system (Antenna, extensions and flange or flange plating) Available materials for BM 70 M flange systems (in contact with the product): Version V96 antenna or Wave-Guide: Material DIN No. AISI equivalent Stainless steel 1.4571 316 Ti Stainless steel 1.4435 316 L Hastelloy C4...

  • Page 28: Electrical Connection

    Electrical connection The electrical connection for supply power and signal inputs/outputs is made in the terminal compartment (Ex-e) of the signal converter. Observe requirements specified in VDE 165, and consult the safety advice given in Section 9.4. In the BM 70 M version with intrinsically safe signal output, only certified intrinsically safe equipment may be connected to the blue terminals, even if the device is not operated in the hazardous area! Terminals...
  • Page 29 ® ® Current output HART , Ex e: Ex-i current output HART Switching output Current output max. 100mA/30V DCAC 32 31 Digital Current input output U min.= 8V 82 81 42 41 32 31 4-20mA 5...28V= Ex-i (IS) U max.= 30V 4-20mA supply unit max.500 Ω...

  • Page 30: Terminating Resistor For The Rs 485 Interface

    PROFIBUS-PA / FF with current output: PROFIBUS-PA / FF with switching output: current switching output output max. 110mA/30V 32 31 U min. = 8V 42 41 32 31 4-20mA Bus- connection Ex-i-supply- unit Bus- connection U max.= 30V Terminating resistor for the RS 485 interface A selector plug on the RS 485 board allows optionally a high-resistance termination (pre- setting) or a terminating resistor of 120 Ohm at...

  • Page 31: Function Of The Keys

    Function of the keys The three keys have the following functions: → (Cursor key): - selects the configuration menu - branches the menu to the next lower level, - moves the cursor* to the right to the next column. ↑ (Select key): - branches the menu to the next digit in the same level, - changes the content (digit, character) at the cursor*...

  • Page 32: Operator Control Concept

    Operator control concept M ain m e nu S u bm e nu Fu nction s D a ta colum n colum n colum n colum n M ea suring m od e 6 27 ↵ W hen th is is disp layed, enter th e 9-ke ystroke En try C od e 1, C o dE1 →...
  • Page 33 Examples of key functions The cursor (flashing part of display) is shown boxed in by dotted lines in the following description To change numbers Increase value ↑ To shift cursor (flashing position) Shift to right → To change the text Select next text ↑...

  • Page 34: Table Of Settable Functions (Versions 3.00, 3.01, 3.02, 3.03, 4.02, 4.03)

    Table of settable functions (Versions 4.04 – 4.06) Function (Fct.) Enter range Default Description value 1.0 OPERATION 1.1 DISPLAY 1.1.1 FCT.DISP Options LEVEL LEVEL Select function of display DISTANCE (value to be displayed). CONVERSION REFLECTION 1.1.2 UNIT.LENGTH Options Meter [m] Select unit for value of length to be displayed (level/distance).
  • Page 35 Function (Fct.) Enter range Default value Description 2.3 SW.OUTPUT 2.3.1 TEST S Options OPEN OPEN Switching output on/off. CLOSED IMPORTANT !!! With safety inquiry because of direct access to the switching output !!! 2.4 FIRMWARE 2.4.1 MASTER Display Displays the firmware version of the master.
  • Page 36 Function (Fct.) Enter range Default Description value 3.1.8 TB. OFFSET Enter 0.00 m To input the tank -100.00 ... + 100.00 [m] bottom offset (relocation of the lower reference point). 3.2 DISPLAY 3.2.1 FCT.DISP. Options LEVEL LEVEL Select function of the DISTANCE display (value to be CONVERSION...
  • Page 37 Function (Fct.) Enter range Default value Description 3.3.4 SCALE 20 mA Enter 10.00 m * Input of the full-scale -200.00 ... +200.00 10.00 m3 range for output to the current output. 0.00 ... 99999.99 (Input is dependent on [m3] the selected function 0 ...
  • Page 38 Function (Fct.) Enter range Default value Description 3.5.2 EMPTY.SPEC. Options OFF * Switch the empty- tank spectrum (profile RECORD of the empty tank) on/off, or make new recording. 3.5.3 TIMECONST. Value Input of the time 10... 100 [s] 30 s constant for measured-value filtering (low-pass).

  • Page 39: Configuration Examples

    Function (Fct.) Enter range Default value Description 3.6.3 THRESHOLD Value 5.00 m Input of the threshold -200.00 ... +200.00 [m] 5.00 m3 value for the 0.00 ... 99999.99 [m3] switching output. 0 ... 100 [Refl.] (Input is dependent on the function of the switching output.

  • Page 40: Level Measurement (Example)

    8.5.1 Level measurement (example) Tank height (Fct. 3.1.1) 6.00 m Antenna extension (Fct. 3.1.4) 0.20 m Block distance (Fct. 3.1.2) 0.70 m Response threshold or = tank height - block distance = 6.00 m - 0.70 m maximum measurable level = (Fct.

  • Page 41: Description Of Functions

    Current output I Function I (Fct 3.3.1) CONVERSION Range I (Fct. 3.3.2) 4 - 20 mA Scaling 4 mA (Fct. 3.3.3) 0.00 m , corresponds to 4 mA Scaling 20 mA (Fct. 3.3.4) 16.80 m , corresponds to 20 mA Switching output Function S (Fct.
  • Page 42 The unit selected here is also valid for the following functions: Scaling 4 mA value, current output Fct. 3.3.3 Scaling 20 mA value, current output Fct. 3.3.4 Threshold (limit value), switching output Fct. 3.6.3 Hysteresis, switching output Fct. 3.6.4 Display range: 0.00 30000.00 9999999...

  • Page 43: Vessel (Tank) Height

    • Depending on the version, it is also possible to set an upper limit for the tank height. The maximum value can be increased by KROHNE Service to up to 100 m. • The tank height set at this point is simultaneously the upper limit of the setting ranges for the...

  • Page 44: Block Distance, Antenna Type And Antenna Extension

    8.6.3 Block distance, antenna type and antenna extension Fct. 3.1.2 BLOCKDIST • Caked deposits or contamination of the antenna, for example, can cause faulty measurements directly below the antenna. The function "block distance" is used to specify a zone below the flange in which measurements are not to be carried out.

  • Page 45: Stilling Well

    8.6.5 Stilling well Fct. 3.1.6 STILLWELL If the device is operated with a stilling well, the option Stilling well = YES and the inside diameter of the pipe should be entered here in mm. • NO: operation without stilling well •...
  • Page 46 Input the following parameters: Tank height Reference offset + 1 m Tank bottom offset The possible measuring range is: Distance = (1 m + block distance) to 7 m. Example 2 Reference point for level measurement BM 70 Reference point differs from the programmed tank bottom Block- distance...

  • Page 47: Display

    8.6.7 Display Fct. 3.2.1 (or Fct. 1.1.1) FCT.DISP. This function is used to select the measured variable. • LEVEL • Measuring range, see Figure in DISTANCE • Sect. 8.5. CONVERSION • REFLECTION If the conversion value is to be displayed, a conversion table must be programmed first otherwise a parameter error will occur.

  • Page 48: Current Output I

    Fct. 3.2.5 ERROR MSG. Use this function to select whether errors are to be displayed during measurement. • NO: Error messages shown only in the error list, see Sect. 8.8 • YES: When errors occur during measurement, display of the measured value will alternate with error messages.

  • Page 49: Communication Interfaces

    The protocol can also be used when the BM 70 M is connected to the KROHNE Tank Inventory System. For further information, please ask for the "BM 70 PC Communication" description.

  • Page 50: Display

    PROFIBUS-PA: (special signal output required) The PROFIBUS-PA is defined and standardised in DIN 19245, Parts 1 and 2. A large number of devices with PROFIBUS-PA capability are available on the market. The BM 70 M is easy to connect to such bus systems; it has a purely slave function and allows access to all dynamic values and to setting parameters.

  • Page 51: Auto Tank Height

    8.6.11 Auto tank height FCT. 3.5.1 AUTO TANKH With this function the height of the tank can be determined by the BM 70 M itself, provided the following conditions are met: • The tank has been completely drained for at least 2 minutes. •...
  • Page 52 Recording of the empty spectrum (sequence, example) Displaye Description → If "9 underscores" now shown, key OPERATION in the 9-keystroke Entry Code 1. 2 x ↑ INSTALL. → BASIS.PARAM. APPLICAT. 4 x ↑ 3.5.2 EMPTY.SPEC. → ↑ Partial empty spectrum already →...
  • Page 53 FCT. 3.5.2 EMPTY.SPEC. Under this function the empty spectrum is activated or deactivated, or recorded and stored. The display first gives information as to whether the empty spectrum is currently switched ON or OFF. You can then choose between: • OFF: The empty spectrum is not considered for measurements but remains stored in the BM 70 M and can be activated again at a later date.

  • Page 54: Time Constant And Tracking Speed

    8.6.13 Time constant and tracking speed Fct. 3.5.3 TIMECONST. • New measured values are damped (filtered) with the time constant so as to avoid abrupt changes in measured values and thus also in the current output I and the display. •...

  • Page 55: Tank Bottom Tracing System

    (This parameter can also be determined by a KROHNE Service technician from the recording of a tank filling or draining operation with the user program (see Sect. 8.12). The level in the tank should in this case change over the largest possible range.)

  • Page 56: Tank Type, Movement Of Product Surface

    Fct. 3.5.7 FUNCT. FTB • The tank bottom tracing system is activated under this function: • The FTB is deactivated; the device operates in the standard mode. • PARTIAL When this option has been selected, the tank bottom tracing system is activated only in the vicinity of the tank bottom, i.e.
  • Page 57 Fct. 3.6.1. FUNCTION S Use this function to select the measured variable. • OFF (= deactivated; Fct. 3.6.2, 3.6.3 and 3.6.4 are no longer selectable, i.e. they are skipped over). • LEVEL • DISTANCE • CONVERSION • REFLECTION • ERROR OPEN (default) •...
  • Page 58 Switching output characteristics FUNCTION S: LEVEL Fct. 3.6.1 DISTANCE CONVERSION Overflow REFLECTION = Threshold + Hysteresis / 2 HYSTERESIS THRESHOLD Fct. 3.6.4 Fct 3.6.3 Underflow TYPE S = Threshold + Hysteresis / 2 Fct. 3.6.2 Switching output HIGH open closed open closed closed...

  • Page 59: Functional Checks

    Functional checks 8.7.1 Main menu 2.0 Test functions Function (Fct.) Input range Description 2.0 TEST 2.1 HARDWARE 2.1.1 MASTER Special function Test of master hardware. 2.1.2 DISPLAY Special function Test of display hardware. 2.1.3 STATUS Select Display of ID Number and Module DIS status bytes.

  • Page 60: Test Of Current Output

    After selecting "Module DIS" or "Module MW" after pressing the ↵ key in each case an Identity Number and an 8-digit binary number are displayed. If an undefined error occurs, please inform KROHNE Service of these values. Terminate the test by pressing the ↵ key twice. 8.7.3 Test of current output Fct.

  • Page 61: Test Of Switching Output

    Correctable errors, which can be remedied by operator action (manual) at the BM 70 M, or possibly by KROHNE Service, see "Error List" in Sect. 8.8.3. e) FATAL ERROR renders operation of the BM 70 M impossible; occurs only when the device is switched on (powered) or after special test functions have been executed, when the self-test identifies an error in the electronics of the BM 70 M, see "Error List"...

  • Page 62: Pointers Provided By 6 Markers During Measurement

    8.8.2 Pointers provided by 6 markers during measurement Marker Cause Explanation No current The device is currently searching for a new measured value in which measured the "measuring window" is opened. If the search for a plausible level value fails, "SIGNAL DOWN" appears in the Error List, see Sect. 8.8.3. Signal too Mean of reflected microwaves is very high.

  • Page 63: Error Messages And Their Representation In Display And At Outputs

    CAL. EEPROM Calibration data of the current DATA error: current output need to be checked by (22 mA) output KROHNE Service and reset if calibration data necessary. CONFIG. EEPROM Check all operating parameters error: and reset if necessary. If error...

  • Page 64: Error Display During Measurement

    Group DA: Display and signal output Group M: Markers 1 - 6 in the display Group S: Switching output • Please go through these charts before contacting KROHNE Service. Thank you! Group D: Display Fault / Symptom Cause Corrective action Display totally Power source switched off.
  • Page 65 - All tests OK: Check receiver instruments and replace if necessary. - Test reveals faults: current output board defective; consult KROHNE Service or replace BM 70 M signal converter (see Sect. 7.3). "OFF" (= current output Depending on the application,...
  • Page 66 70 M is incorrectly configured. Incorrect connection to the Check connection. interface. Communication interface is Consult KROHNE Service or defective. replace BM 70 M instrument head as described in Sect. 7.3. Group DA: Display and signal output Fault / Symptom...
  • Page 67 M off for a short while. If measured value, the BM 70 M is mistakenly unsuccessful, please consult marker 5  is ON. located in the "tank bottom KROHNE Service. detection" range. Display and signal Tank with dished bottom: Record new empty tank output indicate max.
  • Page 68 Group DA: Display and signal output Fault / Symptom Cause Corrective action DA11 Display and signal Storage tank: BM 70 M Change position of the BM 70 M. output indicate mounted centrically or on For recommended distance from sizeable step dome (manhole cover).
  • Page 69 Sect. 8.7.4: - Test OK: check setting and receiver instruments. - Test reveals faults: switching output defective. Consult KROHNE Service or replace BM 70 M signal converter as described in Sect. 7.2. BM 70 M...

  • Page 70: Calculation Of The Measured Value

    Trend and evaluation of the signal during operation PC-CAT works on all IBM-compatible PC’s using Windows 9x or NT. PC-CAT Version 4.01 and higher can communicate with all current KROHNE level radar gauges ® including BM 70 M versions, also with HART protocol and RS 485.

  • Page 71: Power Supply

    PC-CAT allows convenient remote control of all functions of the signal converter. The vessel can be shown in schematic form together with the associated measured values and the measured spectrum. A trend graph of the output signal and threshold signal strength is also provided. All relevant instrument data can be recorded in the form of a data set small enough to be stored on a floppy disk or transferred electronically.

  • Page 72: Fuses

    Fuses Device-internal fuses for power: 24 V DC/ AC* T 1.25 A 115 V AC** T 315 mA 230 V AC** T 160 mA Terminals 1 and 2 are both fuse-protected. Only connection L (for TN system) is fuse-protected; optionally also both connections N and L (for IT system), see Sect.

  • Page 73: Advice On Safety

    Changeover between 1 fuse (TN system) and 2 fuses (IT system) (AC-Version only) Plug the blue wire on the "line" board into the desired position "TN" or "IT". Do not forget to alter the information TN or IT on the signal converter nameplate ("field power"). Reassemble in reverse order, Points 3-1.
  • Page 74 115/230 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. Hazardous duty systems •...

  • Page 75: Certificates And Approvals

    Certificates and approvals 10.1 Declaration of Conformity BM 70 M...

  • Page 76: Ordering Information

    Ordering information Technical information relevant to the order BM 70 M Level-Radar Connecting flange: Flange and antenna material: Waveguide seal: Viton FFKM Kalrez 2035 Other Antenna type: Type 4 (200 mm) Type 3 (140 mm) Type 1 (74 mm) Type 2 (100 mm) [for stilling well dia.: Wave-Stick Wave-Guide...

  • Page 77: External Standards, Codes And Directives

    [in German] ® HUG-3: HART Physical Layer Specification Rev. 7.2: 1993-05 Quality assurance KROHNE Messtechnik GmbH & Co. KG is certified to: • DIN ISO 9001 / EN 29001 and • KTA 1401 QSP 4A (nuclear power engineering) BM 70 M...
  • Page 78 Ex-i current output HART (optionally with Ex-i switching Variant 2 output or PROFIBUS-PA or FF) • RS 485 (Krohne protocol or ModBus) with current output Variant 3 • PROFIBUS-PA (Ex-i), also combined with Var.2 or Ex-i Variant 4 switching output •...
  • Page 79 Open loop voltage < 18 V Data: RS485 interface Baudrate: 1200 to 38400 Baud Address: 0 to 255 ® Protocols: Krohne protocol,Modbus-RTU, HART Data: PROFIBUS-PA 9... 30 V; Base current 10.5 mA; Fault current 6 mA Maximum safety values: ≤ 5nF; L ≈...
  • Page 80 Effect of ambient temperature Measured value: ± 0.08 mm/°C (quasi-static: ∆T < 0.5 °C/min) ± 5 mm (change ∆T > 0.5 °C/min) Influence of the propagation way (in air or N or O -1 ppm/°C of measured distance Signal outputs: see above Application conditions Installation conditions Avoid interfering reflections and multiple reflections...
  • Page 81 Versions: solid antenna or standard horn antenna, both with Design flange connection DN200/PN16 or 8”/150 lbs Dimensions and weights Height above mounting flange: • solid antenna: 730 mm; • horn antenna: 420 mm Weight: approx. 40-70 kg (depends on antenna design) Materials Signal converter: Housing: Stainless steel 1.4435 (or 1.4539) with blue powder...
  • Page 82 Annex B: Type code / nameplates The type code is made up of the following elements: BM 70M . / . / . – E Ex .... - .. _______________________________ ____________________ SIGNAL CONVERTER FLANGE SYSTEM Tank level measuring device Signal converter series Marine Type of protection symbol for signal...
  • Page 83 Annex C: Spare parts BM 70 M...
  • Page 84 BM 70 M...
  • Page 85 BM 70 M...
  • Page 86 (Directions on how you can find out whether the primary head has to be opened and flushed out or neutralised are obtainable from KROHNE on request.) •...
  • Page 87 © KROHNE 08/2002 7.10027.21.00 Part 2 Supplementary Installation and operating instructions for BM 70 M-EEx BM 70 Mi-EEx Variable area flowmeters Vortex flowmeters Flow controllers Electromagnetic flowmeters Ultrasonic flowmeters Mass flowmeters Level measuring instruments Communications engineering Engineering systems & solutions...
  • Page 88 Part 2: Documentation BM 70 M-EEx / BM 70 Mi-EEx General safety information ....................... 3 Safety relevant Type Code......................3 Main safety-relevant characteristics..................4 3.1 Signal converter........................... 4 3.1.1 Category / Zone allocation....................... 4 3.1.2 Types of ignition protection...................... 4 3.1.3 Special lock ..........................

  • Page 89: General Safety Information

    General safety information These additional “Ex“ Instructions apply to the hazardous-duty versions of BM 70 M-EEx level gauges. They are supplementary to the Installation and Operating Instructions issued for the non- hazardous-duty versions. The directions given in these Instructions contain only the data relevant to explosion protection. The technical details given in the Installation and Operating Instructions for the non-hazardous- duty versions apply unchanged unless excluded or superseded by these present Instructions.

  • Page 90: Main Safety-Relevant Characteristics

    Type of waveguide window unassigned stainless steel (standard) Hastelloy Materials of wetted parts antennas and flanges including stainless steel coating Hastelloy B (V96 only) Hastelloy C (V96 only) titanium (V96 only) tantalum (V96 only) gasket materials K6375 Kalrez 6375 K4079 Kalrez 4079 K2035 Kalrez 2035...

  • Page 91: Special Lock

    3.1.3 Special lock The sealing covers of terminal compartment and electronics compartment are secured by special locks. The locking screw requires use of an Allen key (4 mm size). 3.1.4 I/O functions The following limit values need to be taken into account when connecting the I/O interfaces of the BM 70 M-EEx level gauges: BM 70 M-EEx with non-intrinsically safe I/O functions Nominal values of the non-...

  • Page 92: Temperature Classes, Complete Device

    Application restrictions: • Flange system V96 with heating The operator shall ensure that the temperature of the heating medium, when used in Zone 0, shall not exceed 80% of the ignition temperature (in °C) of the product(s) in the tank, and shall not exceed the maximum allowable flange temperature as a function of the temperature class.
  • Page 93 Device versions BM 70 M -EEx /V96 Temperature class Ambient temperature [°C] Maximum flange temperature [°C] 95 *) T4 ... T1 95 *) *) heat-resistant cable required (min. 80°C) Device versions BM 70 M -EEx /SA Temperature class Ambient temperature [°C] Maximum flange temperature [°C] 135 *) T3 ...

  • Page 94: Identifying Marking

    Identifying Marking The level gauges bear the following marking: • on the signal converter stick-on label or metal plate on the converter housing • on the flange system metal plate on the tank mounting flange (V96) or on the side of the antenna (SA). Matching of signal converter and flange system is assured by way of the serial number marked on the two nameplates.

  • Page 95: Signal Converter With Intrinsically Safe I/O Functions

    4.1.2 Signal converter with intrinsically safe I/O functions BM 70 Mi -EEx in Category 2G in combination with: Flange system V96 or SA in Category 1G Marking: II 1/2 G Version Manufacturer European Type acc. to conformity type code Firmware Sales order Version number...

  • Page 96: Assembly And Installation

    Assembly and installation Assembly and installation to be carried out in accordance with the valid installation standards for hazardous areas (e.g. EN 60079-14) by specialist personnel who have received training in explosion protection. In this connection, take note of the directions given in the standard Installation and Operating Instructions, these Supplementary Installation and Operating Instructions (Ex), and the EC type test certificate.

  • Page 97: Connecting Cables

    Terminal compartment in EEx e or EEx ei type of protection Permissible as cable entries and blanking plugs are only parts certified to EN 50 019. The cable clamping area for the supplied cable entries measures 9 – 16 mm. Use cables with appropriate diameter or approved cable entries with matched clamping area in accordance with their test certificate.

  • Page 98: Terminal Assignment

    5.2.4 Terminal assignment Power supply The power connection is of the non-intrinsically safe type for all variants of BM 70 M.-EEx. For detailed information and connection plan see Part 1: Installation and operating instructions for BM 70 M, Section 7.6 Electrical connection 5.2.5 Terminal assignment - I/O functions Non-intrinsically safe I/O functions and intrinsically safe I/O functions are available for the BM70M.-EEx:...

  • Page 99: Initial Start-Up

    Initial start-up Check the following before initial start-up: • Verify suitability of the materials used for the flange system (e.g. flange, antennas, gaskets) for adequate resistance to corrosion from the tank product. • Compare the data on the nameplates of the signal converter and flange with actual operating data.

  • Page 100: Flange Systems

    After any maintenance work has been carried out, be sure to regrease the flameproof cover thread of the signal converter including cover gaskets with a grease suitable for stainless steel threads (e.g. Copper-Anticorrosion paste). Within the scope of checks required to be carried out in hazardous areas to maintain systems in proper working order, the following visual inspections should be carried out at regular intervals: •...

  • Page 101: Replacement Of Complete Device

    Assembly screws (M) for signal converter: Signal converter O-Ring O-Ring Sensor connection (optional) Purge connection (optional) Purge connection (optional) Flange system Flange system Sensor connection (optional) Replacement of complete device The requirements described in Sect. 9.1 also apply in this instance. In addition, make sure that all process connections and the tank are non-pressurized.

  • Page 102: Approvals

    Approvals BM 70M-EEx/ BM 70Mi-EEx...
  • Page 103 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 104 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 105 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 106 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 107 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 108 BM 70M-EEx/ BM 70Mi-EEx...
  • Page 109 (Directions on how you can find out whether the primary head has to be opened and flushed out or neutralised are obtainable from KROHNE on request.) •...
  • Page 110 TEL.: +41(0)61-638 30 30 FAX: +49(0)203-301 389 e-mail: krohne@krohne.it FAX: +41(0)61-638 30 40 e-mail: export@krohne.de China e-mail: info@krohne.ch KROHNE Measurement Instruments Co. Ltd. Korea Room 7E, Yi Dian Mansion Hankuk KROHNE United Kingdom 746 Zhao Jia Bang Road 2 F, 599-1 KROHNE Ltd.

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