Krohne BM 90 EN User Manual

Level-SonicNon contact level gaugingusing ultrasonic wavesInst allation andoperating instructionsBM90/BM90LBM90E/BM90LE05/99KROHNE S.A.CERTIFIEDISO 90

102.1.6 T ransducer Electrical ConnectionsFor BM90 E /LE - Figure 7 belowThe panel mount instrument has two-part screw termi -nals. It can be powered

112.2. T ransducer MountingThe transducer can be supplied as ’standard’ or mounted in a Teflon faced flange for applications requiring chemicalcompati

122.2.1. Alternative mounting arrangements for transducerFLEXIBLE OR RIGID CONDUIT.BRACKET.UNDER FLANGE.INTEGRAL FLANGE WITH PTFE FACE.SLIP-ON

13KEEP TRANSDUCER PERPENDICULAR TO LIQUID. KEEP TRANSDUCERS AND TEMPERATURE COMPENSATION PROBES OUT OF DIRECT SUNLIGHT

142.3. Temperature SensorIf a separate temperature sensor is to be used it must be mounted where it will monitor temperature changes of the airbetween

153. ProgrammingThe Level-Sonic BM90 has two modes :a) RUN (normal operating)b) PROG (programming)In the ‘RUN‘ mode, the instrument is monitoring

163.3. Security codeThe Level-Sonic BM90 programme includes securitycode protection. Any operator can display the value of aparameter, but any attempt

173.5.1. Parameter index Level-Sonic BM90Basic Set-up Open Channel FlowPr.1 Application Pr.45 Flow ExponentPr.2 Units Pr.46 Max. Flow RatePr.3 Empty D

18Pr. 7 Decimal Display (D=2) 3.5.2. Parameter definitionsThe parameters define all the options that are available tothe operator of a Level-Sonic BM

19The application - relay function options are shown on the following tables : (D = 0 or 0.00 for all)Pr. 9 Relay 1 Set Pr. 10 Relay 1 ResetPr. 11

2LEVEL-SONIC BM90 SERIESContents Page1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.1. Level-Sonic BM90 . .

20Pr. 29 Failsafe Time Delay (D=120)Enter value (in seconds) before unit goes to selected fail -safe positions.Minimum value is 30 seconds.Pr. 23 Rel

21Pr. 31 Analogue Value Options (D=1)Pr. 32 Analogue Datum (D=0.00)Pr. 33 Analogue Span (D=100)Pr. 34 Analogue Output Test (D=0)Pr. 30 Analogue Outpu

22Enter the required value for open channel flow devicebeing used.e.g. Flow Device EnterUnity 1Rect. flume 3/2 2Rect. weir 3/2 2V-notch weir 5/2 3

23Pr. 46 Maximum Flow Rate (D=0)Pr. 47 Time Base of Maximum Flow Rate (D=1)Pr. 48 Totalizer Display Conversion (D=0)Pr.49 Control External Counter

24Pr. 52 Duty/Assist/Standby Pump Control (D=1)Pr.53 Pump Exerciser (D=1)Pr. 62 BM90E Serial Communication Enable (D=1)Pr. 57 Pump Run-On Time (D=0)

25Pr. 64 to Pr. 67 UnspecifiedPr. 68 Echo Processing Algorithm Pr. 70 Echo VelocityPr. 69 Check Search (D=1)Pr. 71 Correction Value (D=0.00)Each s

26Pr. 95 Serial Number (Viewable only)Pr. 79 to Pr. 94 UnspecifiedPr. 76 Hardware TestPr. 77 Transmitter TestPr. 78 SimulationPress ’DSP’ then ’ENT’

274. Examples4.1 Level measurement mode (Pr.1 = 1)Applications for this mode are Level Measurement, Contents Measurement and Pump Control.The applicat

284.2. Measurement with volumetric conversion (Pr.1 = 1)The application :lTo measure the level in a conical bottomed cylindrical tank. Dimensions as s

294.3. Pump control (Pr.1 = 1)The application :l2 pump control, pump down in a wet-well, duty-assist operationlAlternate pump duty to reduce wearl4-20

1. Introduction1.1. Level-Sonic BM90The KROHNE S.A. Level-Sonic BM90/BM90E is a multipurpose liquid level measurement and flow control instrument.The

304.4. Differential level mode (Pr.1 = 3)In the differential mode, the transceiver drives two transducers, to measure the difference in levels by subt

314.5. Open channel Flowmeter (Pr.1 = 4)The application : lRectangular flume, with a max. flow of 150 l/s at head 0.3 mlLoss-of-echo indication to tel

324.6. Open channel flowmeter (Pr.1 = 4)with penstock controlThe application : lAs chapter 4.5. but additionally to control a penstock via Relays 1 a

335. Fault Finding5.1. Fault finding - HardwareA) The display is blank or frozen, the l.e.d’s are unlitand the neon does not fire:1. Ensure that power

34and connect a meter across terminals 25 and 26 andrepeat Pr.34 test.If the output is now stable check wiring and metersG) Analogue has no Output:1.

35NOTE: The sensor sensor compensates only for tem-perature variance, it is not expected to accuratelymeasure the actual temperature.P) The boards hum

365.2. Programming sheetPr Description Factory User Eng Pr Description Factory User EngDefault Default Basic Set-up Open Channel Flow1 Application 2.0

37Type BM90 / L RZV15 RZT15 RZV15TBM90E/ LE RXV15 RXT15 RXV15TTemperature Uncompensated Compensated UncompensatedCompensationFrequency (in KHz) 41.50

38APPENDIX 1 Vessel or FlumelinearisationThis feature allows volume conversion to be applied onirregular shaped vessels and flow measurements to bemad

39Points ’A’’b’Number % Head or Level % of Flow of volume1 0 0.02 10 0.03 20 7.24 30 16.15 40 27.36 50 37.57 60 48.58 70 59.59 80 70.510 90 80.011 100

41.2. Initial st art up Level-SonicThe Level-Sonic BM90 system requires programming bythe operator to obtain the required measurements andcontrol. To

40APPENDIX 2 Serial CommunicationsBM90 L ONLYThe Level-Sonic BM90E is fitted with two serial communi -cations channels as standard. Channel 1 has been

41APPENDIX 3 TECHNICAL DATA LEVEL-SONIC Type BM90 / L RZV15 RZT15 RZV15TBM90E/ LE RXV15 RXT15 RXV15TTemperature Uncompensated Compensated Uncompensate

42Pr Description Factory User Eng Pr Description Factory User EngDefault DefaultBasic Set-up Open Channel Flow1.00 Application 2.00 45.00 Flow Exponen

51.2.3. Programming exampleThe following example shows how Level-Sonic BM90should be programmed for a simple level applicationincluding setting a high

62. Inst allationThe installation of the Level-Sonic BM90 unit is straightforward, providing the guidelines in this chapter are fol -lowed.2.1. Conver

7Figure 2:AC power supply - connected:Earth to terminal 1Neutral to terminal 2Live to terminal 3The instrument will automatically accept either 110V

82.1.3. T ransducer Cable Extensions for BM90 / LTransducer cables may be extended using junction boxes as shown below in Figure 3:JunctionScreen - Te

9 KROHNE13452Level-Sonic1HI.TO5R1.HR9R1.STCER5.HRR5.ST2LO.TOTEMP6R2.HR0R2.ST#3HEAD7R3.HR.R3.STMODEDSPDIST4FLOW8R4.HR_R4.STTESTGAINENTmA9614490-91 PANE