ANDERSON-NEGELE FMQ User manual

SENSORS FOR FOOD AND LIFESCIENCE.
Electromagnetic Flow Meter
FMQ
OPERATING MANUAL
FMQ
30007 / 3.1 / 2018-09-21 / AR / EU

General description
- 2 -
Table of contents
1. General description.................................................................................................. 5
1.1. Preface......................................................................................................................5
1.2. Function....................................................................................................................5
1.3. Technical data ..........................................................................................................5
Converter......................................................................................................5
Transmitter in compact design......................................................................6
1.3.3. Measuring ranges.........................................................................................6
2. Safety instructions.................................................................................................... 7
2.1. General remarks.......................................................................................................7
Special diligence of the user .........................................................................7
General safety instructions............................................................................8
2.2. Intended use.............................................................................................................9
2.3. Special safety instructions and devices...............................................................10
2.4. Explanation of the safety symbols used...............................................................10
3. Transport................................................................................................................. 11
3.1. General information ...............................................................................................11
3.2. Special notes..........................................................................................................11
3.3. Dimensions and weight..........................................................................................12
Compact version.........................................................................................12
Dimensions of the process connections......................................................13
4. Arrangement ........................................................................................................... 15
4.1. Conditions required for the transmitter................................................................15
Parts of air and gas.....................................................................................15
Solid parts...................................................................................................15
Fitting position –electrode axis...................................................................16
Inlet and outlet pipe sections.......................................................................18
Conductivity conditions ...............................................................................18
Interference fields .......................................................................................18
Earthing/grounding conditions.....................................................................19
Meter tube lining .........................................................................................19
4.2. Flow direction.........................................................................................................19
4.3. Conditions required for the converter ..................................................................20
4.4. Alignment of the converter....................................................................................20
4.5. Welding work..........................................................................................................21
4.6. Cover.......................................................................................................................21
5. Installation............................................................................................................... 22
5.1. Installation instructions for the transmitter..........................................................22
5.2. Installation instructions for the converter ............................................................23
Installation of the electrical power supply....................................................23
5.2.3 DC Input .....................................................................................................24
5.2.4 Digital Input.................................................................................................25
5.2.5 Digital output...............................................................................................25
5.2.6 Analog output - current output.....................................................................25

General description
- 3 -
5.3 Display.................................................................................................................... 26
6Commissioning....................................................................................................... 27
6.1 General information ............................................................................................... 27
6.2 Advice for starting-up the FMQ............................................................................. 28
6.3 Basic settings upon delivery................................................................................. 28
6.3 System structure and operating elements................................................... 28
6.4. Zero point adjustment (“ZERO adjust”)................................................................ 29
6.5 Metering with an empty meter tube....................................................................... 29
6.5.1 "EMPTY pipe detection".............................................................................. 29
6.6 External reset of counter (use of digital input)..................................................... 29
6.7 Status indication .................................................................................................... 30
6.8 Optical operating elements (display version)....................................................... 30
7Operation................................................................................................................. 31
7.1 Basic keypad functions ......................................................................................... 32
7.2 Image navigator...................................................................................................... 32
7.3.1 Zero reset of the volume counter................................................................ 35
7.3.2 How to delete malfunction messages.......................................................... 35
7.3.3 Parameter change...................................................................................... 35
7.3.4 How to release a parameter change:.......................................................... 36
7.3.5 How to release the service functions:.......................................................... 36
7.4 Image level: Measured values............................................................................... 37
7.4.1 Measured value: Volume............................................................................ 37
7.4.2 Measured value: Flow rate.......................................................................... 37
7.4.3 Measured value: Flow rate and volume ...................................................... 37
7.4.4 Measured value: Total quantity................................................................... 37
7.4.5 Error message: Transmitter not connected................................................. 38
7.5 Image level: Base parameters............................................................................... 38
7.5.1 Language ................................................................................................... 38
7.5.2 CS3Bus address......................................................................................... 38
7.5.3 Dimension................................................................................................... 39
7.5.4 Q type......................................................................................................... 39
7.6 Image level: Pulse output ...................................................................................... 40
7.6.1 PV1............................................................................................................. 40
7.6.2 TP1............................................................................................................. 40
7.6.3 IT1.............................................................................................................. 40
7.7 Image level: Digital input ....................................................................................... 41
7.7.1 Function: Digital input................................................................................. 41
7.7.2 IT1.............................................................................................................. 41
7.8 Image level: Current output................................................................................... 42
7.8.1 Qmax.......................................................................................................... 42
7.8.2 TP3............................................................................................................. 42
7.9 Image level: Metering parameters......................................................................... 42
7.9.1 LFS............................................................................................................. 43
7.9.2 MSPE......................................................................................................... 43
7.9.3 BSPE.......................................................................................................... 43
7.9.4 Average...................................................................................................... 43
7.9.5 Offset.......................................................................................................... 44
7.9.6 SPAN.......................................................................................................... 44
7.9.7 Pipe Detect (recognition of an empty meter tube)....................................... 44
7.9.8 Nominal width............................................................................................. 44
7.10 Image level: Special functions .............................................................................. 44

General description
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7.10.1 Zero adjust..................................................................................................45
7.10.2 Factory settings ..........................................................................................45
7.10.3 LCD contrast...............................................................................................45
7.11 Image level: Service level ......................................................................................46
7.11.1 Error register: Metering...............................................................................46
7.11.2 Error register: Operating system.................................................................46
7.11.3 Simulation of the current output ..................................................................46
7.11.4 Simulation of the pulse outputs...................................................................47
7.11.5 Simulation of the flow rate...........................................................................47
7.12 Image level: Info .....................................................................................................47
7.12.1 Info1............................................................................................................47
7.12.2 Info2............................................................................................................48
7.12.3 Info3............................................................................................................48
7.13 LOCK switch...........................................................................................................48
8Parameterization..................................................................................................... 49
8.1 Adjustments............................................................................................................51
8.1.1 Adjustment by calibration factor "m spe".....................................................52
8.2 Measuring accuracy...............................................................................................53
9Trouble-shooting .................................................................................................... 54
9.1 Error diagnosis.......................................................................................................54
9.1.1 Error diagnosis via the display ....................................................................54
9.1.2 Error list......................................................................................................55
9.2 Typical effects or error sources ............................................................................56
9.2.1 Flow without flow rate indication:.................................................................56
9.2.2 No pulse transmission despite displayed flow.............................................56
9.2.3 No analog signal available..........................................................................57
9.2.4 Deviations of measured values...................................................................58
9.3 Error reset...............................................................................................................59
9.4 Transmitter tests ....................................................................................................59
9.4.1 Insulation test..............................................................................................59
10 Maintenance............................................................................................................ 60
10.1 Safety instructions for maintenance work............................................................60
10.2 Routine maintenance .............................................................................................60
10.2.1 Preventive maintenance steps....................................................................61
10.3 Repairs....................................................................................................................62
10.3.1 Sending-in the flow meter to the manufacturer............................................62
10.3.2 Repair work.................................................................................................62
10.3.2.1 Replacement of the sealing cover of the operating unit...............63
10.3.2.2 Replacement of the transmitter...................................................63
10.4 Special program functions.....................................................................................63
10.4.1 Flow simulation...........................................................................................63
10.4.2 Simulation via the display unit.....................................................................63
10.5 Spare parts to be kept available on your stock....................................................63
11 Decommissioning...............................................................................................- 64 -
11.1 Temporary decommissioning............................................................................- 64 -
11.2 Final decommissioning / disposal.....................................................................- 64 -

General description
- 5 -
1. General description
1.1. Preface
This documentation includes some information protected by copyright. Without prior authorization by
Negele Messtechnik GmbH this instruction manual is not allowed to be photocopied, copied,
duplicated, translated, or recorded on data carriers (neither completely nor in extracts).
This instruction manual should be carefully read before the installation and operation of the
device is started. It has to be deposited in the direct vicinity of the device described, easily
accessible to all persons concerned.
The safety instructions have to be strictly observed.
Negele Messtechnik GmbH cannot assume any liability or legal responsibility for operating
errors caused by the non-observance of these directions.
1.2. Function
The electromagnetic flow meter, type FMQ, measures both the flow rate and the volume of liquid
flows at a high precision.
The measuring device is suitable for measuring conductive liquids in principle.
The FMQ converter is microprocessor controlled. It supplies the transmitter with a switched and
regulated coil current.
The signal generated at the electrodes is amplified in the converter, conditioned and shown in the
internal measuring registers both as flow rate and volume information.
Volume pulses (pulses per volume unit) are output for controlling and regulating purposes.
The instantaneous flow rate is output as an analog signal of 4...20 mA according to the desired
range of 0...100 %.
When leaving the factory, each device is adjusted in such a way that only the power supply and any
peripherals will have to be connected.
1.3. Technical data
Converter
Supply voltage: FMQ DC: 24V ±10% DC
Power consumption: 4 watts max.
Electrical fuse connection: DC power supply: T 1A
Digital pulse output: 1 x optocoupler output
Maximum load: 32 V / 20 mA / pulse sequence: 1 kHz max.
Analog output: 4 - 20 mA ±0.1 mA (active), maximum load 500 
Ambient temperature: -20°C ... +60°C
For further technical data please refer to item 5.3.

General description
- 6 -
Transmitter in compact design
Transmitter
Compact version
Process connection:
Aseptic flange
Nominal widths:
DN 10, 15, 25, 32, 40, 50, 65, 80, 100, 125, 150
Optional product connections:
Clamp, dairy pipe, small flange, etc.
Materials:
Meter tube:
Material no.: 1.4301 / AISI 304
Liner:
PFA
Electrodes:
Material no.: 1.4404 / AISI 316 L
Housing:
Material no.: 1.4301 / AISI 304 (blasted)
Protection class:
IP67
Electrical connection:
Internal cable connection
Calibration data included in the associated converter
Product temperature:
100°C max.
Cleaning temperature:
130°C for a maximum period of 30 minutes
Product conductivity:
5 µS/cm at a minimum, see item conductivity conditions
Admissible pressure:
Minimum: 0.5 bar abs. at 20°C;
Maximum: 16 bar (DN10 –DN100)
Maximum: 10 bar (DN125 –DN150) *
Flow velocities:
0.1 -10 m/s
* The pressure rating depends on the process connection and the seals and gaskets used.
1.3.3. Measuring ranges
DN
Total flow range
[ L/h ]
Flow rate at a
Flow velocity of
1 m/s
[ L ]
Unit
10
30
-
3,000
300
L/h
15
70
-
7,000
700
L/h
25
180
-
18,000
1,800
L/h
32
300
-
30,000
3,000
L/h
40
450
-
45,000
4,500
L/h
50
700
-
70,000
7,000
L/h
65
1,200
-
120,000
12,000
L/h
80
1,800
-
180,000
18,000
L/h
100
2,800
-
280,000
28,000
L/h
125
4,400
-
440,000
44,000
L/h
150
6,400
-
640,000
64,000
L/h
* See 8.2 “Measuring accuracy”.

Safety instructions
- 7 -
2. Safety instructions
Due to the great variety of possible conditions of use, this instruction manual can consider the
general kind of application only.
Special cases such as extraordinary ambient conditions or special safety instructions require
coordination with the manufacturer.
2.1. General remarks
Special diligence of the user
This measuring instrument has been designed and built in consideration of a risk analysis and after a
careful choice of the harmonized standards and further technical specifications to be kept. It
corresponds to the state of the art and offers an optimum safety.
The user of the flow meter is responsible for any inputs of special parameters.
In practical use, however, that degree of safety can only be obtained when all measures required in
this respect will be really taken. It belongs to the diligence of the user of the flow meter to plan such
measures and to check and survey if they are really fulfilled.
In particular, the user has to ensure that:
- The measuring instrument is only used for the intended application as directed (also see the
following chapter “Intended use”).
- The measuring instrument is operated in a perfect and functioning condition and that especially
the safety devices are regularly checked for their proper operation.
- The personal protective equipment required for the operating, maintenance, and repair staff is
kept available and really used.
- The complete instruction manual in a legible condition is permanently available at the location of
the measuring device.
- The device is operated, serviced, and repaired by sufficiently qualified and authorized personnel
only.
- The personnel concerned is regularly trained for all applicable questions of the protection of
labour and environment and familiarized with the instruction manual and especially the safety
precautions included therein.
- All the safety and warning instructions attached to the measuring instrument are not removed
and kept in a legible condition.
In case of problems that he cannot remove on his own, the user of the system should contact the
service department of Negele Messtechnik GmbH.

Safety instructions
- 8 -
General safety instructions
These safety instructions have to be strictly observed in order:
•To not endanger the safety of persons and environment
•To avoid any damages to the measuring instrument
•To prevent any faulty batches upon the production
The electric connection may only be carried out by persons who have got the necessary expert
knowledge (e.g. trained electrical fitters or persons instructed in electrical engineering) and the
necessary authorization from the user.
Unauthorized persons are not allowed to
open a housing that shows this symbol!
The wiring of the voltage supply and the inputs and outputs of the control circuits has
to be carried out professionally in consideration of the up-to-date state of the art. Also
refer to chapter 5 “Installation”/”Electrical Connection”.
In particular, the following references have to be observed:
•Safety instructions
•Electrical connection data
1. All persons who are involved in the installation, commissioning, operation, service, and
maintenance of the flow meter have to be qualified accordingly.
2. This instruction manual has to be strictly observed. The user of the flow meter has to guarantee
that the personnel concerned has read and fully understood the instruction manual.
3. All kinds of work have to be done with utmost care and may be carried out by accordingly
authorized and trained personnel only. At any rate the directives of the respective country for
opening and repairing the devices have to be considered.
4. The instruction manual has to be available close to the flow meter, easily accessible to the
operating staff.
5. Before starting any cleaning, conversion, service or maintenance work, the measuring device
has to be switched off and separated from the mains supply. This requires a device for
separating all live wires, e.g. a 2-pole main switch in the control cabinet. The associated device
has to be protected against unauthorized switching-on.
6. Before starting any service and maintenance work, the system has to be flushed with water and
emptied. If the flow meter has to be removed from the pipe system, all pipelines will have to be
previously emptied and protected by means of some appropriate emptying and shut-off
measures.
7. The flow meter fulfils the general safety requirements according to EN 61010.
8. Never remove or put out of action any safety devices by modifications to the flow meter!
9. Do not touch any parts flown through by the medium while the measuring instrument is cleaned.
Otherwise, you run the risk of getting burnt!
Beware of
dangerous voltage!
Important
information

Safety instructions
- 9 -
10. To minimize the danger of injury, the working area of the operator has to allow sufficiently free
space.
11. The technical data according to the instruction manual, nameplate and, if available, the
performance specification has to be considered.
If damage is caused due to an inexpert performance of work any warranty claims will definitely
extinguish.
Dangers not resulting from the functionality of the device, but from the ambient and operating
conditions prevailing at the place of application, have to be referred to in appropriate instructions to
the operators and by the attachment of some danger signs!
The user of the device is exclusively responsible for the compliance with these instructions!
2.2. Intended use
The measuring instrument is only allowed to be used for the application that it has been designed,
dimensioned and built for:
- the connection to an earthed monophase network or a direct current network (see the
nameplate)
- in industrial areas according to EN 61000-6-2/4 for reasons of EMC
The intended purpose of the electromagnetic flow meter is the measurement of conductive liquids in
the food processing industry and in the cosmetic, pharmaceutical and chemical industries.
This flow meter is not suitable for the measurement of hazardous, explosive, and combustible liquids
according to the Pressure Equipment Directive 97/23/EC, category 1.
The nominal widths up to DN 50 are manufactured in consideration of our “many years of
engineering experience”. The nominal widths larger than DN 65 are subject to category I of the
Pressure Equipment Directive 97/23/EC and the Conformity Assessment Procedure, Module A.
The intended use of the device has to be strictly observed by the user.
Any modifications to the measuring device that might have an influence on the function and the
safety devices of the flow meter are only allowed to be carried out by the engineering specialists or
authorized persons of Negele Messtechnik GmbH.
Possible misuse
Any utilisation being in contradiction to the above-mentioned application means an inadmissible
misuse of the measuring instrument! In such a case Negele Messtechnik GmbH does not assume
any responsibility for the safety.
Negele Messtechnik GmbH has to be contacted before the flow meter will be used for any different
application, and after a careful investigation of all facts Negele Messtechnik GmbH could possibly
release the flow meter for the intended new application.

Safety instructions
- 10 -
2.3. Special safety instructions and devices
The following dangers could be directly or indirectly caused by the flow meter, type FMQ, during
operation or commissioning:
•Electric shock if the electronic housing is opened improperly
•Burns by touching hot pipe sections
•Scalds and/or chemical burns by hot liquids or gas coming out through leaking flange
connections or because of an inexpert opening of the pipe system
2.4. Explanation of the safety symbols used
The FMQ flow meters are reliable in operation and meet the highest technical specifications. They
leave our factory at a safety-related flawless condition. The devices correspond to the relevant
standards and directives according to EN 61010 “Electrical safety testing for measurement and
laboratory devices”. However, a hazard can originate from the devices, if they are used inexpertly
and not for their intended purpose. Therefore, strictly observe the safety instructions of this
instruction manual which are marked by the following symbols:
Hot caustic solution can cause
serious chemical burns
Attention
Es besteht erhöhte
Rutschgefahr im
Nassbereich!
Electrostatically endangered
system component
Electronic scrap
Important
Information
Caution
Beware of hazardous
electric tension
Beware of
hand injuries!
Beware of
hot surfaces!
Beware of hot liquids
and steams
Beware of media
detrimental to health or
irritating substances!
Beware of an increased risk
of skidding in wet areas!

Transport
- 11 -
3. Transport
3.1. General information
The following points have to be respected in order to avoid damages to the measuring instrument or
injuries during the transport of the device:
Transport work is only allowed to be carried out:
- By accordingly qualified and authorized persons
- By the aid of appropriate load suspension and fastening devices
- On the condition that any risk can be fully excluded while the device is lifted
or conveyed
The packing of the measuring instruments is subject to the following labelling:
Fragile goods
Keep dry!
Check the added packing list before you will start opening the packing!
Compare by means of the packing list if all parts are really available or not!
Treat sensitive parts with special care!
Please do not fail to dispose of the packing material according to the appropriate regulations.
3.2. Special notes
When removing the packaging film, see to it that no components of the device (such as display or
keypad) are damaged or destroyed.
Caution

Transport
- 12 -
3.3. Dimensions and weight
Compact version
DN
W
[mm]
D
[mm]
H
[mm]
H1
[mm]
H3
[mm]
Weight
[kg]
10
104
90
225
110
180
6.0
15
104
90
225
110
180
5.8
25
104
90
225
110
180
5.6
32
104
105
240
125
188
6.4
40
104
105
240
125
188
6.4
50
104
130
265
150
200
7.9
65
160
130
265
150
200
8.8
80
160
155
290
175
213
11.2
100
200
170
305
190
223
13.2
125
250
220
355
240
245
27.0
150
300
220
355
240
245
30.0

Transport
- 13 -
Dimensions of the process connections
Welding socket (standard)
FG hygienic flange
Threaded socket DIN 11851
Conical socket / grooved nut DIN 11851

Transport
- 14 -
TriClamp DIN 32676
Varivent flange
DIN flange EN ISO 1092-1
All undimensioned parts are according to
DIN EN 1092-1
PN16, type 11, shape B (DN 10…100)
PN10, type 11, shape B (DN 125…150)

Arrangement
- 15 -
Caution
4. Arrangement
4.1. Conditions required for the transmitter
In any case the transmitter has to be installed in the product line and the converter has to be
supplied with voltage.
When selecting the place for the installation of the measuring instrument you should in any rate
ensure that the housing can be opened for service work whenever desired and that the flow meter
can be simply removed, if necessary.
Equalising currents between the transmitter and the converter have to be absolutely avoided, as they
will cause measuring errors.
To protect the transmitter against damage, select the place of installation so that:
•the process pressure is always kept below the admissible operating pressure
•the product temperature is always kept below the admissible temperature
•the transmitter is mechanically levelled out (e.g. to avoid vibration)
•the meter tube can be emptied in case of the danger of frost
•the measuring instrument is not arranged straight above a gully or sink hole
•the connection housing is not permanently exposed to drip water
Parts of air and gas
The electromagnetic measuring instrument can supply perfect measuring results in case of gas-free
liquids only. Air locks or deaeration in a liquid will lead to faulty measurements.
Thus, make sure that air locks or other possible parts of gas are safely separated before the
measuring device e.g. by gas separators or that deaeration can be excluded by a sufficient working
pressure.
The measuring device is not damaged e.g. by air locks.
Solid parts
Normally, solid parts do not have any negative influence on the volume measurement.
The pipe diameter should always be chosen sufficiently large in order to prevent the meter tube from
being clogged in case of products including solid particles.
Due to the fact that the flow velocity of solid matters is relatively lower than that of the liquid part of
the product, a higher flow fluctuation could be caused while the flow rate is determined.
The measurement of abrasive materials can cause a drifting of the measuring accuracies and, in the
end, a deterioration of the transmitter.

Arrangement
- 16 -
Fitting position –electrode axis
Due to the principle described, the fitting position –to a certain extent –can be selected any
way desired. The basic condition for accurate measuring results is, however, a full and gas-free
meter tube.
If possible, the electrode axis should be horizontally arranged, in order to avoid a deposition of gas
bubbles or solid particles on the surface of the electrodes. Therefore, a slightly ascending pipeline is
advisable, preferably with a deaerating possibility at its highest position.
The fitting position should be chosen in such a way that a good readability and handling of the
operating unit is guaranteed.
The pipelines within the inlet and outlet pipe sections must not show any unevenness, e.g. welding
beads.
Electrode axis

Arrangement
- 17 -
Suggestions for installation
freier Auslauf
<5m
freier Auslauf
Wrong
At the highest point of the pipeline. Gas bubbles
accumulate in the transmitter. →Faulty measurement!
Wrong
Descending pipe:
At the end of the conveyance of the metered product
the pipe runs empty. →Measuring errors!
Correct
Preferred mounting position:
Rising pipeline and horizontal pipe section before an
ascending pipeline
Descending pipelines of a length of more than 5 m
have to be equipped with a deaeration valve after the
flow meter.
Correct
In case of a horizontal pipe conduct the mounting
position is placed in slowly increasing sections of the
pipe.
Correct
Provide a culvert for free inlet or outlet. The transmitter
is permanently filled with liquid as demanded.
Long lines after the flow meter always have to be
equipped with a shut-off device. If it is placed before the
flow meter, a vacuum will be caused in the metering pipe
by the big kinetic energy in the liquid column when
shutting off. This can damage the lining of the tube!
Do not place the flow meter on the suction side of the
pump! →Danger of negative pressure!
Free outlet
Free outlet

Arrangement
- 18 -
Inlet and outlet pipe sections
For the installation of electromagnetic transmitters DIN 1944 recommends an inlet pipe section of 5 x
DN and, accordingly, an outlet pipe section of 3 x DN in case of an undisturbed flow. For an irregular
flow (e.g. distorted rotational flow profile) the inlet and outlet pipe sections have to be extended
accordingly or a rectifying device for the flow has to be installed in order to guarantee the specified
measuring accuracy.
Conductivity conditions
The liquid to be measured has to show a minimum conductivity of ≥5 µS/cm.
Demineralised water requires a conductivity of ≥20 µS/cm.
A count suppressor for empty meter tubes belongs to the standard equipment of the converter. That
function will have to be switched off at conductivities below 50 µS/cm (‘Pipe Detect’off).
In case of low conductivities it is recommended to carry out a calibration under operating conditions.
Interference fields
Straight at the transmitter masses of iron or strong permanent or electromagnetic fields must
absolutely not exist, as they could influence the defined exciting magnetic field, thus falsifying the
signal.
5xDN 3xDN
Keep the recommended inlet and outlet sections!
Avoid curvatures of space before the flow meter!

Arrangement
- 19 -
Earthing/grounding conditions
A perfect earthing/grounding of the transmitter is an essential requirement for a reliable and accurate
measurement.
“Inductive measuring method” means that the metered liquid itself acts as an electric conductor, i.e.
a correct and careful earthing/grounding ensures that no additional potentials will falsify the
extremely low metering signal.
For that reason, the earthing/grounding resistance has to be definitely smaller than 10 Ω. The
earth/ground wire used must not transfer any interference voltages, i.e. no other electric devices
must be connected to that line.
If in case of a plastic pipe system no equipotential bonding is available between the inlet and outlet
sides, it will be necessary to take some appropriate measures for a potential equalisation.
The transmitter has to be earthed/grounded as shown in this picture:
Meter tube lining
A damaged PFA lining can cause faulty measurements or even a failure of the flow meter.
Choose the place of installation in such a way that no negative pressure can be caused, even not
when the pump is switched off. An installation at the highest point of the pipeline has to be avoided!
4.2. Flow direction
The FMQ measures the flows in both flow directions in principle. The main flow direction is marked
on the converter by means of an arrow:
In the standard setting the digital outputs emit the volume pulses independently of the flow direction.
Negative flow rates and quantities are displayed with a MINUS sign.
On the condition that the inlet and outlet conditions are kept, the accuracy of the measurement in
both directions is only slightly different.

Arrangement
- 20 -
4.3. Conditions required for the converter
Please observe the following points for the locating place to protect the converter
against damage:
•The limit values for the ambient temperature have to be kept.
•Fasten the field housing from mechanical strain!
•No moisture may enter the field housing through the cable gland.
•The converter has to be installed at a place which is free from vibration to a large extent.
•The covers have to be closed.
•The housing may not be permanently subject to dripping water.
Apart from that, please ensure that the housing can be easily opened for service purposes.
The converter has to be installed in such a way that perfect reading and operation of the operating
unit is guaranteed!
4.4. Alignment of the converter
1. Loosen the 4 screws crosswise (Do not remove them!)!
2. Turn the converter into the desired direction (180° max. to the left or right)!
3. Tighten the 4 screws crosswise!
Caution