KRAL BEM 300 Series User manual

Operating Instructions
KRAL Electronics - BEM 300 Series.
OIE 15en
Edition 2019-12 HW 2.0/SW 2.0

2 OIE 15en Edition 2019-12 HW 2.0/SW 2.0 Operating Instructions
Table of Contents
KRAL Electronics – BEM 300 Series
About this document
□Target groups 4
□Symbols 4
□Danger levels 5
□Further applicable documents 5
□Safety instructions 5
Function description
□Volume measurement 6
□Mass calculation 6
□Averaging 6
□Flow direction detection 6
□Electronic evaluation 7
□Bus connection 7
□Applications of the KRAL electronic unit 8
▪Single-line measurement 8
▪Differential measurement 9
Transportation, storage and maintenance
□Unpacking and checking
the state of delivery 10
□Transportation 10
□Storage 10
□Disposal 10
▪Safety instruction for disposal 10
▪Disposing of the electronic unit 10
□Maintenance 10
□Cleaning 10
Installation and removal
□Safety instructions on installation,
removal and connection 11
□Installation 11
▪Dimensions 11
▪Scope of delivery 11
▪Installation in the control cabinet 12
▪Wall mounting 13
▪Pipe mounting / mounting on volumeter 13
□Removal 14
▪Removing the electronic unit
from the control cabinet 14
▪Removing the electronic unit
from the wall 14
▪Removing the electronic unit
from the pipe/volumeter 14
Electrical connection
□Terminal panel of the electronic unit 15
□Technical data of connections 16
▪Power supply 16
▪Tension spring terminals 16
▪Pulse inputs 16
▪Analog, pulse and relay outputs 16
▪Analog input display background
illumination 17
▪Display 17
▪Modbus interface 17
▪Ambient conditions 18
□Connection assignments 19
▪Pick ups 19
▪Analog outputs 19
▪Pulse outputs 19
▪Power supply 24 V DC 19
▪Serial interface 19
▪Analog input background illumination 20
□Connecting cables 20
▪Safety instructions for electrical
installation 20
▪Connecting cables to the tension
spring terminals 21
▪Connecting the sensors 22
▪Connecting analog and pulse outputs 22
▪Connecting the power supply 22
Commissioning
□Safety instructions for commissioning 23
□Checking the electronic unit 23
□Taking the electronic unit out of operation 23
Operation of the basic functions
□Key assignment 24
□Operation at a glance 25
▪General operating steps 25
▪Operating the basic functions 26
□Abbreviations, quantities and units 27
▪Abbreviations used 27
▪Quantities and units 27
▪Pulse signals 27
Menu description
□Menu structure 28
□Start 29
▪Start message 29
□Shortcut pages 29
▪1.07 Language selection 29
▪1.12 Help operation 29
▪Menu 7: Alarms 29
□Menu 1: Display 29
▪1.01 Volumeter A 29
▪1.02 Volumeter A Total with resetting 29
▪1.03 Reset collective error message 30
▪1.04 Information 30
▪1.05 Setting display brightness 30
▪1.06 Setting display contrast 30
▪1.07 Setting select language 30

Operating Instructions OIE 15en Edition 2019-12 HW 2.0/SW 2.0 3
Table of Contents
KRAL Electronics – BEM 300 Series
□Menu 2: Settings 30
▪2.01 Enable password 30
▪2.02 Select unit rate 31
▪2.03 Select unit total 31
▪2.04 Select unit density 31
▪2.05 Function analog output 31
▪2.06 Scale analog output 1 31
▪2.07 Averaging analog output 31
▪2.08 Scale pulse output 1 32
▪2.09 Start message 32
▪2.10 Address modbus 32
▪2.11 Function sensor 32
▪2.12 Averaging display rate 32
▪2.13 Function pulse input 33
▪2.14 Reset to factory setting 33
▪2.15 Decimal places 33
□Menu 3: K-factors Volumeter A 33
▪3.01 K-factor Volumeter A Point 1 33
□Menu 4: Density table 1 33
▪4.01 Density table 1 Point 1 33
□Menu 7: Alarms 33
Troubleshooting
□Information about faults 34
□Alarms 34
□Further faults 35
Accessories
□Accessories mounting 37
▪Universal mount fixing kit 37
▪Fixing kit for pipe mounting /
mounting on OMG 37
▪Fixing kit OME 38
▪Adapter set for conversion
of BEM 4U to BEM 300/500 38
□Accessories electrical connection 39
▪Rack mounting power
supply unit EEN 12 39
▪Plug-in power supply unit EEN 13 40
□Data acquisition accessories 41
▪Data logger BEA 60 and BEA 61 41
□Display accessories 42
▪Remote display BEA 59 42
Appendix
□Glossary 43
□Notes 45

4 OIE 15en Edition 2019-12 HW 2.0/SW 2.0 Operating Instructions
Target groups
About this document
About this doc ument The operating instructions form part of the BEM 500 electronic unit and must be kept for future
reference. Furthermore please observe the associated applicable documents.
Target groups
Symbols
Target group Tasks
Operator-owner □Keep these instructions available at the installation site for future
reference.
□Ensure that employees read and observe these instructions and the
associated documents, in particular the safety instructions and
warnings.
□Observe additional system-specific directives and regulations.
Specialist personnel, fitters □Read, observe and follow these instructions and the associated
documents, in particular the safety instructions and warnings.
Symbol Meaning
Warning personal injury
Note
Procedures installation and removal
Procedures electrical installation
Check or fault table
Operating steps for electronic unit
Faults in the electronic unit
Faults in the KRAL Volumeter
Faults in the system
Input errors
Request for action

Operating Instructions OIE 15en Edition 2019-12 HW 2.0/SW 2.0 5
Danger levels
About this document
Danger levels
Further applicable documents
Safety instructions
Warning Danger level Consequences of non-observances
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
Caution Potentially dangerous situation Material damage
Declaration of conformity as per EU Directive 2014/30/EU
Corresponding operating instructions for the Volumeter
Corresponding operating instructions for the sensor
Calibration certificate
Worksheet
The following general safety instructions must be observed:
□No liability is accepted for damage arising through non-observance of the operating instructions.
▪Read the operating instructions carefully and observe them.
▪The operator-owner is responsible for the observance of the operating instructions.
▪Installation, removal and installation work may only be carried out by specialist personnel.
□Implement all the supply lines without faults.
□Observe the general regulations for the prevention of accidents as well as the local safety and
operating instructions.
□Observe the valid national and international standards and specifications of the installation
location.

6 OIE 15en Edition 2019-12 HW 2.0/SW 2.0 Operating Instructions
Volume measurement
Function description
Function descript ion With its functional scope the KRAL electronic unit covers a wide range of functions. The electronic unit is
optimized for use together with KRAL Volumeters. KRAL Volumeters generate a specific number of
pulses per flow volume unit - depending on the size and working point. This device-specific characteri-
stic is called the K-factor (unit: Pulses/Liter) and is listed in the enclosed calibration report.
The pulse signals of one volumeter can be evaluated. The following signals are available:
□PNP
□Namur
□NPN
For push-pull pick ups either PNP or NPN can be selected.
In addition the devices can also be equipped with further pick ups for flow direction detection. The elec-
tronic unit is supplied with settings in accordance with the customer requirements.
Together with diverse options for signal transfer with analog, pulse and bus outputs this means that an
extensive scope of performance is available that offers the following main possibilities:
Volume measurement
The instantaneous value of the volume flow (volume per time unit) is calculated from the measured
value of the incoming pulses per time unit and the stored mean K-factor and is displayed. Furthermore
the total number of measured pulses can be used to display the total flow (volume) as a total value since
the device was last reset. Rate values represent the current instantaneous values, total values corres-
pond to the sums since the last resetting.
Mass calculation
The instantaneous value of the mass flow (mass per time unit) is calculated from the measured value of
the incoming pulses per time unit and the stored values of mean K-factor and mean density and is dis-
played. Furthermore the total number of measured pulses can be used to display the total flow (mass)
as a total value since the device was last reset.
Rate values represent the current instantaneous values, total values correspond to the sums since the
last resetting.
Averaging
A strongly fluctuating flow rate causes a jumping display or as a result a fluctuating analog output. The
averaging function reduces this effect by generating a mean value across several measured values. The
number of measured values for averaging can be set, see "2.07 Averaging analog output", page 31, and
see "2.12 Averaging display rate", page 32.
Flow direction detection
In extreme cases the flow direction can change through pulsations, meaning through liquid waves in the
piping system. By using two pick ups which generate square wave signals out of phase by 90° (square
wave encoder signals) a reversal in the flow direction is recognized and taken into account when calcu-
lating the total value.
The electronic unit offers incremental encoding inputs for each volumeter. This means that the flow
direction can be determined without additional components and taken into account in the calculation at
any time.

Operating Instructions OIE 15en Edition 2019-12 HW 2.0/SW 2.0 7
Electronic evaluation
Function description
Electronic evaluation
The electronic unit receives signals from the pick ups and calculates the measured values which are
indicated in the display unit and which can be called up at the analog output or at the bus interface.
Possibilities of the electronic unit:
□Language selection
□Display of the measured values in different units (volumes, masses and temperatures)
□Averaged display values
□A density for conversion to mass
□Information message at faults or invalid inputs
□1 scaleable and assignable analog output 0 - 10V / 4 - 20 mA
□1 scaleable and assignable pulse output
Bus connection
The electronic unit can be connected to the system by means of a Modbus interface and can thus be
integrated optimally into existing systems. This ensures that simple, reliable and rapid data exchange
can be implemented.

8 OIE 15en Edition 2019-12 HW 2.0/SW 2.0 Operating Instructions
Applications of the KRAL electronic unit
Function description
Applications of the KRAL electronic unit
Different extension stages of the electronic unit are presented on the basis of the following examples.
This allows the required functional scope to be selected in accordance with the requirements.
Single-line measurement
Tab. 1 Extension stages single-line measurement
Extension stage Components Functions
Fig. 1 Basic
□1 Volumeter
□1 Pick up
□1 BEM 300 electronic unit
□Electronic evaluation
□Volume measurement
□1 Analog output
□1 Pulse output
Fig. 2 Basic +
Temperature
compensation
□1 Volumeter
□1 Pick up
□1 Temperature sensor
□1 BEM 500 electronic unit
□Electronic evaluation
□Volume measurement
□Temperature compensation
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
□Batching
Fig. 3 Basic +
Flow direction detection
□1 Volumeter
□2 Pick ups
□1 BEM 300 electronic unit
□Electronic evaluation
□Volume measurement
□Flow direction detection
□1 Analog outputs
□1 Pulse output
Fig. 4 Basic +
Flow direction detection +
Temperature
compensation
□1 Volumeter
□2 Pick ups
□1 Temperature sensor
□1 BEM 500 electronic unit
□Electronic evaluation
□Volume measurement
□Flow direction detection
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
□Batching

Operating Instructions OIE 15en Edition 2019-12 HW 2.0/SW 2.0 9
Applications of the KRAL electronic unit
Function description
Differential measurement
Tab. 2 Extension stages differential measurement
Extension stage Components Functions
Fig. 5 Basic
□2 Volumeters
□1 Pick up each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 6 Basic +
Temperature
compensation
□2 Volumeters
□1 Pick up each
□1 Temperature sensor each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 7 Basic +
Flow direction detection
□2 Volumeters
□2 Pick ups each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Flow direction detection
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 8 Basic +
Flow direction detection +
Temperature
compensation
□2 Volumeters
□2 Pick ups each
□1 Temperature sensor each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Flow direction detection
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs

10 OIE 15en Edition 2019-12 HW 2.0/SW 2.0 Operating Instructions
Unpacking and checking the state of delivery
Transportation, storage and maintenance
Transportation , storage and ma in tenance Unpacking and checking the state of delivery
1. On delivery unpack the electronic unit and check for damage during transportation.
2. Report damage during transportation immediately to the manufacturer.
3. Dispose of packing material in accordance with the locally applicable regulations.
Transportation
► If possible, transport the electronic unit in the original packaging, while observing the ambient condi-
tions, see "Ambient conditions", page 18.
Storage
► If possible, store the electronic unit in original packaging in a cool and dry place, while observing the
ambient conditions, see "Ambient conditions", page 18.
Disposal
Safety instruction for disposal
Disposing of the electronic unit
► As electronic waste the electronic unit has to be disposed of properly.
Maintenance
The electronic unit is maintenance-free.
Cleaning
In order to clean the electronic unit wipe the housing with a soft cloth. In case of stronger soiling moisten
the cloth with water that has a common detergent added. Only wipe the surface off lightly with a moist
cloth. Under no circumstances may water penetrate the inside of the electronic unit!
The following safety instruction must be observed during disposal:
► Observe the local regulations on disposal.