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Summary of Contents for KRAL BEM 500
- Page 1 Operating instructions KRAL display and processing unit BEM 500 SW 3.004 OIE 12en-GB Edition 2020-03 Original instructions www.kral.at...
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Page 2: Table Of Contents
Table of contents 1 About this document ............. 3 Connecting analog outputs, relay outputs and pulse out- puts ................ 19 General information ............ 3 Connecting the power supply........ 20 Target groups .............. 3 Associated documents .......... 3 8 Commissioning.............. 21 Symbols................. 4 Checking the electronic unit ......... 21 1.4.1 Danger levels ............ 4 9 Decommissioning............ -
Page 3: About This Document
1 About this document 1.1 General information 1 About this document 1.1 General information These instructions form part of the product and must be kept for future reference. Furthermore please observe the associated documents. Notice In these operating instructions the designation "Electronic unit" is used for the "Display and processing unit". -
Page 4: Symbols
1 About this document 1.4 Symbols 1.4 Symbols 1.4.1 Danger levels Signal word Danger level Consequences of non-observance DANGER Immediate threat of danger Serious personal injury, death WARNING Possible threat of danger Serious personal injury, invalidity CAUTION Potentially dangerous situation Slight personal injury ATTENTION Potentially dangerous situation... -
Page 5: Safety
2.1 Proper use 2 Safety 2.1 Proper use o The electronic unit is provided for usage with a KRAL flowmeter. o Use the electronic unit only within the operating limits specified in the "Technical data" chapter. 2.2 Foreseeable misuse o Any use that extends beyond the proper use or any other use is misuse. -
Page 6: Connection Data
3 Technical data 3.3 Connection data 3.3 Connection data 3.3.1 Power supply Parameter Unit Value Power supply [V DC] 24 ± 20 % Max. current consumption [mA] Insulation voltage <500 3.3.2 Tension spring terminals Cable type Unit Terminating range Strand 0.08 – 2.5 Litz wires 0.08 – 2.5 Wire end ferrule 0.25 – 1.5 3.3.3 Pulse input and temperature input... - Page 7 3 Technical data 3.3 Connection data Output Designation Unit Value Pulse output Active pulse source (PNP transistor switches power supply) Short-circuit proof Scalable Output current max. [mA] Load [kΩ] > 1 Signal level at 24 V DC power High [V DC] > 20 supply [V DC] <1...
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Page 8: Modbus Interface
3 Technical data 3.4 Connection field 3.4 Connection field 24 VDC RS232 Pulse Output (2) Pulse Output (1) RS485 Pt 100 A Pt 100 B 4...20mA (1) 4...20mA (2) Pulse In A Pulse In B Pick up B 1 Pick up A 1 Pick up A 2 Pick up B 2 0...10 V (1) -
Page 9: Pin Assignment
3 Technical data 3.5 Pin assignment 3.5 Pin assignment Component Connection/function Terminal Pick up NPN/PNP Namur Flowmeter A Flowmeter B Push-pull Pick up A1 or B1 U+24 V DC U+8.2 V DC Signal Signal – Pick up A2 or B2 U+24 V DC U+8.2 V DC (+90°) Signal Signal – Analog output 4 – 20 mA 0 – 10 V Analog output 1... -
Page 10: Ambient Conditions
4.1 Functional principle 4.1.1 Usage The electronic unit is provided for usage with a KRAL flowmeter. Flowmeters generate a specific number of pulses per flow volume unit - depending on the size and working point. This device-specific characteristic is called the K-factor (unit: Pulses/liter) and is spe- cified on the calibration certificate. -
Page 11: Temperature Compensation
4.1.12 Filling A simple filling function can be implemented with the KRAL electronic unit, see 1.07 Filling volume. After the filling function has been started, Relay output 1 is activated when the specified quantity is reached in order, for example, to close a valve that interrupts the filling process, see 3.13 Setting... -
Page 12: Flow Direction Detection
Electronic evaluation o 2 pick ups o Volume measurement o 1 temperature sensor Pt100 o Flow direction detection o 1 BEM 500 electronic unit o Mass flow measurement o Temperature compensation o 2 relay outputs 000138 o 2 analog outputs... - Page 13 4 Function description 4.1 Functional principle Notice The BEM 500 electronic unit can also be used for two separate single-line measurements. Differential measurement Extension stage Components Functions o 2 flowmeters o Electronic evaluation o 1 pick up each o Differential measurement o 1 BEM 500 electronic unit...
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Page 14: Modbus Interface
4 Function description 4.2 Modbus interface 4.2 Modbus interface 1.01 Consumption rate Q 4000 +/-2 147 483 647 1 ... 3 Unit rate 0103 4000 0002 D1CB 1.02 Total 1 4002 +/-2 000 000 000 1 ... 3 Unit total 0103 4002 0002 700B Total 2 4004 +/-2 000 000 000... -
Page 15: Transportation, Storage
Password o Work sheet o Mounting frame with screws and wedge lock washers o Terminal tool o KRAL tool set 5.2 Unpacking and checking the state of delivery o Trained personnel Personnel qualification: Upon delivery check the product for damage during transportation. -
Page 16: Installation, Removal
Electrician Personnel qualification: Personal protective equipment: o Work clothing o KRAL tool set Aids: Notice When the space is limited, mounting is also possible without a housing cover and without a seal with cable entries. Notice An adapter set is available for converting BEM 4U to the electronic unit BEM 500 Ä Accessor- ies, Page 42. -
Page 17: Mounting The Electronic Unit To The Wall
Electrician Personnel qualification: o Work clothing Personal protective equipment: Aids: o KRAL tool set For wall mounting a universal mount is available as an accessory Ä Accessories, Page 42. Electronic unit Universal mount Requirement: ü Universal mount mounted to the wall ü... -
Page 18: Connection
7.2 Connecting cables to the tension spring terminals o Electrician Personnel qualification: o Work clothing Personal protective equipment: o KRAL tool set Aids: o Diagonal cutter DANGER Risk of death resulting from electric shock if the connection of hazardous potentials (>48 V) to the potential-free relay outputs (orange terminals 9 - 11 and/or 42 - 44) is required. -
Page 19: Connect The Pick Ups And Temperature Sensors
Electrician Personnel qualification: o Work clothing Personal protective equipment: Aids: o KRAL tool set o Diagonal cutter o Wiring diagram ATTENTION Device damage through incorrect connection ► Observe pin assignment and connection data of the electronic unit Ä Technical data, Page 5. -
Page 20: Connecting The Power Supply
Replace the rear device cover. 7.5 Connecting the power supply o Electrician Personnel qualification: Personal protective equipment: o Work clothing o KRAL tool set Aids: o Diagonal cutter o Wiring diagram ATTENTION Device damage through incorrect connection ► Observe pin assignment and connection data of the electronic unit Ä Technical data, Page 5. -
Page 21: Commissioning
8 Commissioning 8.1 Checking the electronic unit 8 Commissioning 8.1 Checking the electronic unit Some basic checks must be performed before commissioning the electronic unit. Test Procedure Installation Check that the electronic unit is seated firmly. During wall mounting/ pipe mounting or assembly on flowmeter: ensure that the rear device cover and cable entries seal properly. -
Page 22: Operation
10 Operation 10.1 Abbreviations, units and signals 10 Operation 10.1 Abbreviations, units and signals 10.1.1 Abbreviations Abbreviation Meaning Current consumption QA-QB Nominal flow rate Total consumption since last reset (without password protection) Total consumption since last reset (with password protection) Current flow flowmeter A (supply line) Current flow flowmeter B (return line) Temp. -
Page 23: Key Assignment
10 Operation 10.2 Key assignment 10.2 Key assignment The electronic unit is operated by means of five keys. Button Function o Confirmation of the entry o Reset of total values o Confirmation of the selection o Switching to the following menu item o Select the previous unit o Increase the digit o Switching to the previous menu item... - Page 24 10 Operation 10.3 Operation at a glance Operating steps Change the pass- Press. word, see ð Flashing cursor indicates the active input field. 2.02 Setting With Yes select. Change password Press. ð 1.30 Enter password setting is displayed. ð Flashing cursor indicates the active input field. With Change the position within the number input.
- Page 25 10 Operation 10.3 Operation at a glance Operating the basic functions The following table describes the basic operating steps. They can be carried out in part without a pass- word having to be entered. Operating steps Reading the con- Call up menu item sumption, see Press simultaneously.
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Page 26: Menu Description
11 Menu description 11.1 Menu structure Operating steps Check the values With select menu. for the K-factors, With select menu item. see Menu 5: K- factors flow- meter B Call up alarms, see With and. Select menu. Menu 8: Alarms With Call up existing alarms. 11 Menu description 11.1 Menu structure Menu... -
Page 27: Start
11 Menu description 11.2 Start Menu Information o 3.01 Setting Function analog output Output settings o 3.02 Setting Allocation analog output 1 o 3.03 Setting Scale max. analog output 1 o 3.04 Setting Allocation analog output 2 o 3.05 Setting Scale analog max. output 2 o 3.06 Setting Averaging analog average o 3.07 Setting Function pulse output o 3.08 Setting Allocation pulse output 1 o 3.09 Setting Scale pulse output 1... -
Page 28: Menu 1: Display
11 Menu description 11.3 Menu 1: Display 11.3 Menu 1: Display o Display of measured values o Resetting the sum o Setting contrast and background illumination o Ä Operation, Page 22 Menu item Description 1.00 Information Shows the serial number as well as the version of software and hardware. 1.01 Consumption Displays the current consumption in the preset unit. -
Page 29: Menu 2: General Settings
11 Menu description 11.4 Menu 2: General settings Menu item Description 1.09 Display direction Shows the number of the flow direction changes of the flowmeter B since the last reset. change Volumeter B Requirement: 2.13 Setting Function pulse inputs Set to Encoder . Note: The counter can be increased in case of a power failure even without change of direction. - Page 30 11 Menu description 11.4 Menu 2: General settings Menu item Description 2.07 Setting Select unit Set values unit temperature temperature 2.08 Setting Select unit Set values unit density density 2.09 Select setting Twp density tables are available for determining the density of two different liquids. Alternatively dens- density determination ity calculation for fuel oils can be carried out.
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Page 31: Menu 3: Output Settings
11 Menu description 11.5 Menu 3: Output settings Menu item Description 2.16 Setting Averaging The averaging allows for a stable display with varying flow amounts. Possible values, adjusted to the display rate average requirements, are between 1 and 10000. In case of averaging the display of quick changes takes place with a time delay. - Page 32 11 Menu description 11.5 Menu 3: Output settings Menu item Description 3.04 Setting Allocation analog output 2 Rate consumption A-B or A+B o QA Rate current flow flowmeter A o QB Rate current flow flowmeter B o T1 Total consumption A-B or A+B o TA1 Total flow flowmeter A o TB1 Total flow flowmeter B...
- Page 33 11 Menu description 11.5 Menu 3: Output settings Menu item Description 3.09 Setting Scale The scale of the pulse output is used to set the pulse significance. Since the pulse values can also be pulse output 1 output in packets, the manufacturer recommends using the pulse output only for total values. Select the scale so that the limit frequency of 250/125 Hz is not exceeded.
- Page 34 11 Menu description 11.5 Menu 3: Output settings Menu item Description 3.13 Setting Function relay 1 Relay 1 is deactivated. Bypass 1 Differential measurement with two flowmeters. If one of the counters with the rate values drop below the Limit value bypass and the second follows within the Bypass delay, the relay goes to the basic setting and the alarm Bypass valve activated is generated.
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Page 35: Menu 4: K-Factors Flowmeter A
11 Menu description 11.6 Menu 4: K-factors flowmeter A 11.6 Menu 4: K-factors flowmeter A o Entry of the K-factors of the flowmeter A with increasing frequency for the formation of the lineariza- tion characteristic o K-factors, associated frequencies and resulting K-factor, see calibration certificate of the flowmeter o Resulting K-factor, also see rating plate of the flowmeter o Changes only possible with password o Ä... -
Page 36: Menu 6: Density Table 1/Density Calculation
11 Menu description 11.8 Menu 6: Density table 1/density calculation 11.8 Menu 6: Density table 1/density calculation o Entry of up to 10 temperature values and density values of a density table in ascending order o Enables temperature compensation and mass calculation of the flow values o The density table can be requested from the supplier of the liquid. -
Page 37: Menu 7: Density Table 2
11 Menu description 11.9 Menu 7: Density table 2 11.9 Menu 7: Density table 2 o Entry of two density tables when using different liquids o Enables temperature compensation and mass calculation of the flow values o The density table can be requested from the supplier of the liquid. o Selection of the density table used, see 2.09 Select setting density determination o Changes only possible with password o Ä... -
Page 38: Maintenance
12 Maintenance 12.1 Required maintenance 12 Maintenance 12.1 Required maintenance The electronic unit is maintenance-free. 12.2 Cleaning the electronic unit ATTENTION Device damage through water. ► Ensure that no water enters the electronic unit. Wipe the housing with a soft cloth. In the case of strong soiling wipe off the housing surface slightly moist with a common detergent. - Page 39 14 Troubleshooting 14.1 Fault table Fault message Cause and elimination 8.06 Alarm Bypass Relay 2 for collective error message is active, Relay 1 for bypass valve has dropped. valve activated. Check o Check flowmeter for blockage. volumeter! o Optimize settings in the menu items 3.13 – 3.16 . In case of independent measurement with two flowmeters: o If bypass function is not desired, 3.14 Setting Limit value bypass Set to 0 .
- Page 40 14 Troubleshooting 14.1 Fault table Fault message Cause and elimination 8.14 Alarm temperature Temperature sensor B or Temperature input B is defective. sensor failure o Check the sensor connection. Volumeter B! o Replace the sensor. o Check the temperature input. If single-line measurement with temperature compensation is used: o Connect a 100 Ohm resistor between Terminal 36 and 37 with a wire jumper from 37 to 38.
- Page 41 14 Troubleshooting 14.1 Fault table Further fault Cause and elimination o Use a power pack 24 V DC 15 W or insert a debounced switch between the electronic unit and When the electronic unit is switched on, the following power pack. alarms are displayed: o Shield the lines to the pick ups and terminate the shield to Gnd (chassis) or ground.
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Page 42: Accessories
15 Accessories 15.1 Installation 15 Accessories 15.1 Installation 15.1.1 Fixing kits The electronic unit can be installed by various methods. In addition to the mounting frame that forms part of the scope of delivery, diverse fixing kits for mounting the electronic unit are available as ac- cessories. -
Page 43: Fixing Kit Mounting On Ome
Change BEM 4U to BEM 500 Notice The previously used temperature sensors have to be replaced by temperature sensors with Pt100 out- put. These temperature sensors are available from KRAL. During conversion, observe setting the tem- perature sensor units. Notice Depending on the sheeting thickness of the control cabinet the supplied screws may have to be re- placed by longer screws. -
Page 44: Electrical Connection
15 Accessories 15.2 Electrical connection 15.2 Electrical connection 15.2.1 Different voltage The electronic unit operates with a power supply of 24 V DC. If a deviating voltage is available in the system, a suitable power supply unit can be used. 15.2.2 Rack mounting power supply unit EEN 12 Fig. 4: Rack mounting power supply unit EEN 12 Component Parameter... -
Page 45: Plug-In Power Supply Unit Een 13
15 Accessories 15.2 Electrical connection Component Parameter Unit Value Environment Storage temperature [°C] -40 ~ +85 Operating temperature [°C] -25 ~ +60, above 50 °C performance reduc- tion 1.5 %/°C Cooling Air convection Electrical safety Design to EN 60950 Degree of protection IP 20 Insulation voltage (input/ [kV] 3, routine tested output) -
Page 46: Appendix
16 Appendix 16.1 Glossary Component Parameter Unit Value Output Output voltage [V DC] 24 ± 2 % Output current max. [mA] Output power Short-circuit protection Continuous (auto recovery) Overvoltage protection Environment Operating temperature [°C] 0 ~ +40 Storage temperature [°C] -20 °C ~ +85 Dimensions [mm] 80.6 x 47.9 x 43.3 Weight Tab. 12: Technical data EEN 13 Cable assignment... - Page 47 16 Appendix 16.1 Glossary Designation Meaning o A rising edge is followed after a certain period by a falling edge Pulse (signal) o Corresponds to the square wave signal Pulse output o Generates pulses with 24 V signal level conforming to the scale of an input variable Pulse input o Processes pulse signals Pick up (A/B)1...
- Page 48 KRAL GmbH, 6890 Lustenau, Austria, Tel.: +43/5577/86644-0, E-Mail: kral@kral.at www.kral.at...
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