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Summary of Contents for KROHNE LEVEL-SONIC BM90 Series
- Page 1 05/99 Level-Sonic I n s tallation and operating Non contact level gauging instructions BM90/BM90L using ultrasonic waves BM90E/BM90LE KROHNE S.A. CERTIFIED ISO 9001 BM90 / L BM 90 E / LE Panel mounted...
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Page 2: Table Of Contents
LEVEL-SONIC BM90 SERIES Contents Page Introduction ........ -
Page 3: Introduction
1. Introduction 1.1. Level-Sonic BM90 The KROHNE S.A. Level-Sonic BM90/BM90E is a multipurpose liquid level measurement and flow control instrument. The KROHNE S.A. Level-Sonic BM90L/BM90LE is also available for powder and granulate level. It consists of two main elements, a microprocessor based transceiver and a high-efficiency transducer. -
Page 4: Initial Start Up Level-Sonic Bm90
Similarly, if a parameter value is displayed then press- 1 . 2 . I n i t i a l s tart up Level-Sonic i n g ’s’ o r ’t ’ key will momentarily flash the next para- meter number and then display that parameter value. The Level-Sonic BM90 system requires programming by If a key is not pressed for a period of 30 seconds the operator to obtain the required measurements and... -
Page 5: Programming Example
hold the transducer approximately 1.5 m above a surface and press ‘MODE‘ to return to the run condition. The display will read approximately zero. I f i t d i s p l a y s LOST it is because the transducer is more than the 1.5 metre (distance to furthest point) from your target. -
Page 6: I N S Tallation
2 . I n s ta l l a t i o n must be protected from severe weather conditions. The installation of the Level-Sonic BM90 unit is straight forward, providing the guidelines in this chapter are fol- Note : Electrical Connection lowed. -
Page 7: Transducer Wiring For Bm90 / L
2 . 1 . 2 . Transducer Wiring for BM90 / L The wall mount instrument has two-part screw terminals. It can be powered from either an AC or DC supply. Figure 2: 9 10 11 12 13 14 15 16 17 18 AC POWER DC Power 110/230 VAC... -
Page 8: Transducer Cable Extensions For Bm90 / L
2 . 1 . 3 . Transducer Cable Extensions for BM90 / L Transducer cables may be extended using junction boxes as shown below in Figure 3: T r a n s c e i v e r T r a n s d u c e r J u n c t i o n C o r e - T e r m . -
Page 9: Bm90 E/Le Panel Mounted Converter
2.1.4. BM90 E/LE Panel mounted converter The panel mount instrument has two rear screw termi- nals. There is no serial commnucation connector even on the BM90 LE 150 BEHIND PANEL f i g 5 90-91 PANEL CUTOUT HI.TO LO.TO HEAD FLOW R1.HR R2.HR... -
Page 10: Tranducer Electrical Connections For Bm90 E / Le
2.1.6 Transducer Electrical Connections Transducer RZV15 and RXV15 - are connected: Black to terminal 4 For BM90 E /LE - Figure 7 below Blue to terminal 5 Screen to terminal 6 The panel mount instrument has two-part screw termi- nals. It can be powered from either an AC or DC supply. Temperature compensated transducer RZT15 and RXT15 - are connected: AC power supply - connected: Earth... -
Page 11: Transducer Mounting
2 . 2 . Transducer Mounting The transducer can be supplied as ’standard’ or mounted in a Teflon faced flange for applications requiring chemical compatibility. The figure below shows the dimensions: The transducer is provided with integral cable which can An isolation kit is provided with each transducer to min- be extended up to 300 metres using a suitable junction imise any ringing transmitted through the mounting struc... -
Page 12: Alternativ Mounting
2.2.1. Alternative mounting arrangements for transducer F L E X I B L E O R R I G I D U N D E R F L A N G E . B R A C K E T . C O N D U I T . - Page 13 D O N O T A I M T H R O U G H T E M P E R A T U R E C O M P E N S A T I O N I N S T A N D P I P E S . H O L E S I N T H E T A N K .
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Page 14: Temperature Sensor
2 . 3 . Temperature Sensor If a separate temperature sensor is to be used it must be mounted where it will monitor temperature changes of the air between the transducer and the liquid. This is usually adjacent to the transducer, but should not be in direct sunlight and should be protected from wind chill. -
Page 15: Programming
3. Programming Key 7 Relay 3. Hours energised. Key 8 Relay 4. Hours energised. Relay 5. Hours energised. The Level-Sonic BM90 has two modes : Key 9 Relay 1. Number of times energised. Key 0 Relay 2. Number of times energised. (normal operating) Relay 3. -
Page 16: Security Code
3.3. Security code 3.5. Programming The following is the programming sequence to set up a The Level-Sonic BM90 programme includes security unit for operation. If you have not done this before, refer code protection. Any operator can display the value of a back to chapter 1 "Initial start up Level-Sonic BM90". -
Page 17: Parameter Index
3.5.1. Parameter index Level-Sonic BM90 Basic Set-up Open Channel Flow Pr.1 Application Pr.45 Flow Exponent Pr.2 Units Pr.46 Max. Flow Rate Pr.3 Empty Distance Pr.47 Time Base for Flow Rate Pr.4 Operational Span Pr.48 Totalise Display Conversion Pr.5 Blanking Distance Pr.49 Control of Ext. -
Page 18: Parameter Definitions
L E A S E D O N O T R E D U C E T H E F A C T O R Y S E T R e s e t ( l . e . d . o f f )Pr.10 Pr.13 Pr.16 Pr.19 Pr.22 KROHNE S. A . VALUE WITHOUT REFERENCE T O... - Page 19 The application - relay function options are shown on the following tables : (D = 0 or 0.00 for all) P r . 8 Basic A pplication - Relay Function 1 - 2 Relay 1 Pr. 1 = 1 / Pr.1 = 2 Pr.
- Page 20 Pr. 20 Relay 5 Designation - Basic Application - Relay Function Relay 5 Pr. 1 = 1 / Pr.1 = 2 Pr. 1 = 3 Pr. 1 = 4 Designation Level / Distance Differential Open Channel Flow Enter O f f N / A O f f Level Alarm...
- Page 21 Pr. 30 Analogue Output (D=1) Pr. 1 Entry Application Output Proportional To 1.00 Liquid Level a) Liquid Level b) Liquid volume if Pr.40 is used 2.00 Distance a) Target distance b) Space volume if Pr.40 is used 3.00 Differential (DLD) Differential level.
- Page 22 Pr. 40 Vessel Shape (D=0) Pr. 43 Display Conversion (D=1) If Pr.40 entry is between 1 - 8 then enter - full scale dis- ’ 0 ’ = no volume conversion p l a y ¸ 100 = flat bottomed vessel and percentage of span 2 - 7 = standard shapes as shown below e.g.
- Page 23 Flume K Factor Flume K Factor Pr. 50 Penstock Control (D=1) Size-Inches for US GPM Size-Feet for US GPM Enter 1 - No drive 3.22 331.60 2 - Penstock control 6.45 393.70 9.46 486.90 The control system uses relays 1 and 2 to drive a pen- 18.20 642.10 stock up and down respectively to maintain the flow in a...
- Page 24 N O T E: Pr. 52 Duty/Assist/Standby Pump Control (D=1) a. The system assumes that the lower numbered Duty assist is where pumps are switched on by set point, pumps turn on first. and kept on to assist earlier pumps. Duty standby is where only one of the pumps specified for duty can be on CAUTION - A PUMP NOT INCLUDED IN AN at a time, i.e.
- Page 25 Pr. 64 to Pr. 67 Unspecified 2. It can be used to prevent loss-of-echo when Pr. 68 Echo Processing Algorithm the target can go further away from the transdu- cer than the desired span. Each system has two echo extraction techniques, which e .
- Page 26 Pr. 79 to Pr. 94 Unspecified Pr. 76 Hardware Test Pr. 95 Serial Number (Viewable only) Press ’DSP’ then ’ENT’ to test LED’s/LCD and relays. The LCD will flash all segments, and the LED’s will count This parameter displays the serial number of the Level- u p i n b i n a r y .
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Page 27: Examples
4. Examples 4.1 Level measurement mode (Pr. 1 = 1 ) Applications for this mode are Level Measurement, Contents Measurement and Pump Control. 0 . 5 m ( P r . 5 ) S e t A l a r m 4 . -
Page 28: Measurement With Volumetric Conversion
4.2. Measurement with volumetric conversion (Pr. 1 = 1 ) 0 . 5 m ( P r . 5 ) S e t H i g h A l a r m ( P r . 9 ) R e s e t H i g h A l a r m ( P r . 1 0 ) ( P r . -
Page 29: Pump Control
4.3. Pump control (Pr. 1 = 1 ) 0 . 5 m ( P r . 5 ) S t a r t 2 4 . 0 0 ( P r . 1 2 ) 5 . 4 m S t a r t 1 ( P r . -
Page 30: Differential Level Mode
4.4. Differential level mode (Pr. 1 = 3 ) In the differential mode, the transceiver drives two transducers, to measure the difference in levels by subtracting the downstream level from the upstream level. Please refer to connection diagram Fig. 6 for transducer wiring. The upstream transducer should be chosen to give a positive differential value. -
Page 31: Open Channel Flowmeter
4.5. Open channel Flowmeter (Pr. 1 = 4 ) T r a n s d u c e r p o s i t i o n 3 - 4 t i m e s m a x . h e a d . 5 0 c m ( P r . -
Page 32: Open Channel Flowmeter With Penstock Control
4 . 6 . Open channel flowmeter (Pr. 1 = 4 ) with penstock control The application : As chapter 4.5. but additionally to control a penstock via Relays 1 and 2 to modulate flow between 25 and 30 l/s ENTER: Pr.1 - Pr.6 as example 5, then go to Pr.9 P r . -
Page 33: Fault Finding
connect and remove the transducer and connect it direct 5 . Fault Finding to the Liquiflex. If the unit now operates, recheck the extension cable connections and routing, avoiding power cables. Re-instal the transducer checking that its aim is perpendicular to the target surface. 5 . - Page 34 25 and 26, repeat test under Pr.34. L) Reading is unstable : If no value is read at terminals 25 to 26 contact Krohne. 1. If a high rate of change (Pr.6) is defined the display will H) Analogue Output is less than 20 at maximum dis- be more unstable.
- Page 35 N O T E: The sensor sensor compensates only for tem- perature variance, it is not expected to accurately measure the actual temperature. P) The boards hums loudly: * Usually vibration from the transformer. 1. Check the mounting screws for tightness. Q) Relays not switching: 1.
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Page 36: Programming Sheet
5.2. Programming sheet Description Factory User Description Factory User Default Default Basic Set-up Open Channel Flow Application 2.00 Flow Exponent 1.00 Units 2.00 Max. Flow Rate 0.00 Empty Distance 10.00 Time Base for Flow 1.00 Operational Span 10.00 Totalise Display Conv. 0.00 Blanking Distance 0.50... -
Page 37: Technical Data Level-Sonic
6 . Technical Data Level-Sonic 6 . 1 . Converter BM90 / BM90 L BM90 E / BM90 LE Enclosure IP65 Aluminium NORYL DIN43700. IP55 to front of panel. IP20 behind panel. Dimensions 206 (8.11") x 326 (12.83") x 123 (4.84") 144H X 96W X 140D (mm). -
Page 38: Appendix 1 : Vessel - Flume Linearisation
Vessel or Flume Pr.44 - Keyboard Controls PPENDIX linearisation Toggles the display between data blocks ‘A‘ and ‘b‘ This feature allows volume conversion to be applied on Increases and decreases the point number, irregular shaped vessels and flow measurements to be when either the point number or its value is made on open channels providing that level/volume/flow displayed... - Page 39 Example: Flow - Special Flume Mapping Use Example 4.5 on Page 31, but substitute a special ’U’ throat flume with maximum flow 39 litres/second at 30 cm/hd. First, create the following table from the relationship of head and flow which must be given forthe special flume. Point Head (cm) % Head...
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Page 40: Appendix 2 : Serial Communications Bm90 L Only
2 Serial Communications 1. Commissioning System PPENDIX The commissioning system allows the echoes being BM90 L ONLY received and processed by Level-Sonic BM90LE to be downloaded to an IBM or compatible computer (usually The Level-Sonic BM90E is fitted with two serial communi- portable), so that they can be viewed easily. -
Page 41: Appendix 3 : Parameter Settings
TECHNICAL DATA LEVEL-SONIC PPENDIX Converter BM90 / BM90 L BM90 E / BM90 LE Enclosure IP65 Aluminium NORYL DIN43700. IP55 to front of panel. IP20 behind panel. Dimensions 206 (8.11") x 326 (12.83") x 123 (4.84") 144H X 96W X 140D (mm). Weight 4 Kg (8.8 lb) 1.75Kg... - Page 42 PPENDIX PARAMETER SETTINGS BM90 / L ; (--) = BM90 E / LE SETTINGS Description Factory User Description Factory User Default Default Basic Set-up Open Channel Flow 1.00 Application 2.00 45.00 Flow Exponent 1.00 2.00 Units 2.00 46.00 Max. Flow Rate 0.00 3.00 Empty Distance 10(15)
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