FISCHER EA14D User manual

Operating manual
EA14D
Differential pressure evaluation unit
with colour change LCD
09005114 • BA_EN_EA14D • Rev. ST4-A • 06/18 *09005114*

| Masthead FISCHER Mess- und Regeltechnik GmbH
2 / 36 BA_EN_EA14D
Masthead
Manufacturer: FISCHER Mess- und Regeltechnik GmbH
Bielefelderstr. 37a
D-32107 Bad Salzuflen
Telephone: [phone]
Telefax: [phone]
eMail: [email protected]
web: www.fischermesstechnik.de
Technical editorial team: Documentation representative: T. Malischewski
Technical editor: R. Kleemann
All rights, also those to the translation, reserved. No part of this document may
be reproduced or processed, duplicated or distributed using electronic systems
or any other form (print, photocopy, microfilm or another process) without the
written consent of the company FISCHER Mess- und Regeltechnik GmbH, Bad
Salzuflen.
Reproduction for internal use is expressly allowed.
Brand names and procedures are used for information purposes only and do
not take the respective patent situation into account. Great care was taken
when compiling the texts and illustrations; Nevertheless, errors cannot be ruled
out. The company FISCHER Mess- und Regeltechnik GmbH will not accept any
legal responsibility or liability for this.
Subject to technical amendments.
© FISCHER Mess- und Regeltechnik 2018
Version history
Rev. ST4-A 06/18 Version 1 (first edition)

FISCHER Mess- und Regeltechnik GmbH Table of contents
BA_EN_EA14D 3 / 36
Table of contents
1 Safety instructions .........................................................................................................................................4
1.1 General .....................................................................................................................................................4
1.2 Personnel Qualification.............................................................................................................................4
1.3 Risks due to Non-Observance of Safety Instructions ...............................................................................4
1.4 Safety Instructions for the Operating Company and the Operator............................................................4
1.5 Unauthorised Modification ........................................................................................................................4
1.6 Inadmissible Modes of Operation .............................................................................................................4
1.7 Safe working practices for maintenance and installation work .................................................................5
1.8 Pictogram explanation ..............................................................................................................................5
2 Product and functional description ..............................................................................................................6
2.1 Delivery scope ..........................................................................................................................................6
2.2 Intended use .............................................................................................................................................6
2.3 Function diagram ......................................................................................................................................6
2.4 Design and mode of operation..................................................................................................................6
2.5 Equipment versions ..................................................................................................................................7
3 Assembly.........................................................................................................................................................9
3.1 General .....................................................................................................................................................9
3.2 Process connection (external pressure transmitter) .................................................................................9
3.3 Electrical connection (auxiliary energy, output signals) ..........................................................................10
4 Start-up..........................................................................................................................................................12
4.1 General ...................................................................................................................................................12
4.2 Configuration ..........................................................................................................................................12
4.3 LC display ...............................................................................................................................................12
4.4 Keyboard ................................................................................................................................................13
4.5 Menu levels.............................................................................................................................................14
5 Servicing .......................................................................................................................................................27
5.1 Maintenance ...........................................................................................................................................27
5.2 Transport ................................................................................................................................................27
5.3 Service....................................................................................................................................................27
5.4 Disposal ..................................................................................................................................................27
6 Technical data...............................................................................................................................................28
6.1 Generalities.............................................................................................................................................28
6.2 Input variables ........................................................................................................................................28
6.3 Output sizes............................................................................................................................................28
6.4 Measurement accuracy ..........................................................................................................................29
6.5 Auxiliary energy .....................................................................................................................................29
6.6 Operating conditions...............................................................................................................................29
6.7 Display and operating interface ..............................................................................................................29
6.8 Construction design ................................................................................................................................30
7 Order codes ..................................................................................................................................................34
7.1 Accessories ............................................................................................................................................35
8 EU Declaration of Conformity .....................................................................................................................36

1 | Safety instructions FISCHER Mess- und Regeltechnik GmbH
4 / 36 BA_EN_EA14D
1 Safety instructions
1.1 General
This operating manual is an integral part of the product and therefore needs to
be kept close to the instrument in a place that is accessible at all times to the re-
sponsible personnel.
The following sections, in particular instructions about the assembly, commis-
sioning and maintenance, contain important information, non-observance of
which could pose a threat to humans, animals, the environment and property.
The instrument described in these operating instructions is designed and manu-
factured in line with the state of the art and good engineering practice.
1.2 Personnel Qualification
The instrument may only be installed and commissioned by specialized person-
nel familiar with the installation, commissioning and operation of this product.
Specialized personnel are persons who can assess the work they have been
assigned and recognize potential dangers by virtue of their specialized training,
their skills and experience and their knowledge of the pertinent standards.
1.3 Risks due to Non-Observance of Safety Instructions
Non-observance of these safety instructions, the intended use of the device or
the limit values given in the technical specifications can be hazardous or cause
harm to persons, the environment or the plant itself.
The supplier of the equipment will not be liable for damage claims if this should
happen.
1.4 Safety Instructions for the Operating Company and the Operator
The safety instructions governing correct operation of theinstrument must be
observed. The operating company must make them available to the installation,
maintenance, inspection and operating personnel.
Dangers arising from electrical components, energy discharged by the medium,
escaping medium and incorrect installation of the device must be eliminated.
See the information in the applicable national and international regulations.
Please observe the information about certification and approvals in the Tech-
nical Data section.
1.5 Unauthorised Modification
Modifications of or other technical alterations to the instrument by the customer
are not permitted. This also applies to replacement parts. Only the manufacturer
is authorised to make any modifications or changes.
1.6 Inadmissible Modes of Operation
The operational safety of this instrument can only be guaranteed if it is used as
intended. The instrument model must be suitable for the medium used in the
system. The limit values given in the technical data may not be exceeded.
The manufacturer is not liable for damage resulting from improper or incorrect
use.

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1.7 Safe working practices for maintenance and installation work
The safety instructions given in this operating manual, any nationally applicable
regulations on accident prevention and any of the operating company's internal
work, operating and safety guidelines must be observed.
The operating company is responsible for ensuring that all required mainten-
ance, inspection and installation work is carried out by qualified specialized per-
sonnel.
1.8 Pictogram explanation
DANGER
Type and source of danger
This indicates a direct dangerous situation that could lead to death or serious
injury (highest danger level).
a) Avoid danger by observing the valid safety regulations.
WARNING
Type and source of danger
This indicates a potentially dangerous situation that could lead to death or ser-
ious injury (medium danger level).
a) Avoid danger by observing the valid safety regulations.
CAUTION
Type and source of danger
This indicates a potentially dangerous situation that could lead to slight or seri-
ous injury, damage or environmental pollution (low danger level).
a) Avoid danger by observing the valid safety regulations.
NOTICE
Note / advice
This indicates useful information of advice for efficient and smooth operation.

2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH
6 / 36 BA_EN_EA14D
2 Product and functional description
2.1 Delivery scope
• 1 x differential pressure evaluation unit EA14D
• 2 x pressure transmitter incl. connection cable
• Operating Manual
– Analysis unit
– Pressure Transmitter
2.2 Intended use
The device can be used as a display and switching unit in combination with two
external service sensors (0/4…20 mA and/or 0…10 V). The medium compatibil-
ity depends on the technical data of the sensors used.
2.3 Function diagram
SP1
SP2
Sig 1
Sig 2
1,234
A
D
A
D
µC
þ û ÿ
D
A
D
A
+
1
2
1
3
4
Channel 1
Channel 2
Fig.1: Function diagram
1 External pressure sensor 2 Switch output
3 Optional analogue output 4 Micro-controller
2.4 Design and mode of operation
The device is based on an electronic evaluation circuit that analyses the meas-
uring signals of two external pressure transmitters. The main task is the calcula-
tion of the differential pressure that can be displayed and analysed. The signals
of the external pressure transmitters can be shown separately for review. The
evaluation unit allows two independent switch points to be set. Optionally two
additional output signals can be made available.
The external pressure transmitters are connected to the differential pressure
evaluation unit via flexible plug connection lines. Only the supplied pressure
transmitters may be connected. The nominal pressures of the external sensors
and the basic measuring range are set ex-works and stated on the type plate.

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2.5 Equipment versions
EA14 D... H ... EA14 D... M ...
Type plate
Wiring diagram
+
+
Process connection
Supply
Switch output
Fig.2: Equipment versions
2.5.1 Assembly types
Standard Wall mounting
Panel installation Assembly of the mounting rails
Fig.3: Assembly types

2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH
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2.5.2 Type plate
Item no.
Basic measuring range
Input signal
Output signals
Ub
Switch contacts
Prod.-No.
24 V AC/DC
Umax. 32 V AC/DC Imax. 2 A
Pmax. 64 VA / 64 W
Δ P, P1/P2 0 ... 20 mA
0 ... 20 mA
0 ... 6 bar
EA14D006MA4KWCMW
1806856.01.086
Order code
Techn. Data
Serial number
Fig.4: Type plate

FISCHER Mess- und Regeltechnik GmbH Assembly | 3
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3 Assembly
3.1 General
The device is designed for installation onto flat assembly plates. For screw con-
nection to the assembly plate, the device features four assembly bores on its
back, which can be used for Ø 3.5 mm tapping screws. Optionally, the device
can be delivered with a wall-mounting plate, a front-mounted panel set or an ad-
apter for assembly of the support rail.
3.2 Process connection (external pressure transmitter)
• By authorized and qualified specialized personnel only.
• The pipes need to be depressurized when the pressure transmitter is being
connected.
• Appropriate steps must be taken to protect the pressure sensors from pres-
sure surges.
• Check that the pressure transmitter is suitable for the medium being meas-
ured.
• Please observe the maximum pressure levels.
The information about the connection of the pressure lines are stated in the op-
erating instructions for the pressure transmitters. The external connection of the
two external pressure transmitters is realised with a 2 or 3-line connection de-
pending on the model. The supplied connection lines are manufactured accord-
ingly.
3.2.1 M12 plug connection
The plug assignment is identical for both inputs. The plug connections are
marked with (+) and (-) on the equipment.
+
Fig.5: Process connection
1 2
4 3
5
A
PIN Signal (2L pressure transmitter)
1Pressure transmitter signal and supply (+) +SigT/+UT
2
3Pressure transmitter signal and supply (-) -SigT/-UT
4
5Functional earth Fe
ACoding
Tab.1: Connection for 2-wire pressure transmitter
1 2
4 3
5
A
PIN Signal (3L pressure transmitter)
1Pressure transmitter supply (+) +UT
2Pressure transmitter signal (-) -SigT
3Pressure transmitter supply (-) -UT
4Pressure transmitter signal (+) +SigT
5Functional earth Fe
ACoding
Tab.2: Connection for 3-wire pressure transmitter

3 | Assembly FISCHER Mess- und Regeltechnik GmbH
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3.2.2 Plug connector DIN EN 175301-803 A
The plug assignment is identical for both inputs. The plugs are marked with (+)
and (-).
Fig.6: Process connection
1
3
2
PIN Signal (2L pressure transmitter)
1Pressure transmitter signal and supply (+) +SigT/+UT
2Pressure transmitter signal and supply (-) -SigT/-UT
3
Functional earth Fe
Tab.3: Connection for 2-wire pressure transmitter
PIN Signal (3L pressure transmitter)
1Pressure transmitter signal (+) +SigT
2Pressure transmitter supply (+) +UT
3Pressure transmitter signal and supply (-) -SigT/-UT
Functional earth Fe
Tab.4: Connection for 3-wire pressure transmitter
3.3 Electrical connection (auxiliary energy, output signals)
• By authorized and qualified specialized personnel only.
• When connecting the unit, the national and international electro-technical
regulations must be observed.
• Disconnect the system from the mains, before electrically connecting the
device.
• Install the consumer-adapted fuses.
• Do not connect the connector if strained.
The information about the approved operating voltage and the approved load
for the analogue outputs are in the Technical Data section.
The M12 plugs are marked with (1) and (2) on the equipment.
Plug 2
Plug 1
Fig.7: Electrical connection

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3.3.1 Plug 1: Auxiliary energy, analogue output
Mains adapter
+Out2
+Ub
-Ub
Output1
EA14D
+
+Out1
24 V AC/DC
230 V AC
+ (~)
- (~)
Plug 1
1
3
2
4
Output2
5FE
Fig.8: Analogue output connection
2 1
3 4
5
A
PIN Signal
1Operating voltage (+) +Ub
2Analogue output 2 (+) +Out2
3Operating voltage (-) -Ub
4Analogue output 1 (+) +Out1
5Functional earth Fe
ACoding
Tab.5: Auxiliary energy and analogue output connection
3.3.2 Connector 2: Switch output
2 1
3
A
4
SP1SP2
PIN Signal
1Switching output 1 SP1
2Switching output 2 SP2
3Switching output 2 SP2
4Switching output 1 SP1
ACoding
Tab.6: Connection of the switching outputs

4 | Start-up FISCHER Mess- und Regeltechnik GmbH
12 / 36 BA_EN_EA14D
4 Start-up
4.1 General
All electrical supply, operating and measuring lines, and the pressure connec-
tions must have been correctly installed before commissioning. All supply lines
are arranged so that there are no mechanical forces acting on the device.
Check that the pressure connections do not leak before commissioning.
4.2 Configuration
During commissioning there are a number of setting options that allow the
device to be adapted to the measuring point and measuring task. To facilitate
the input, the individual parameters are placed into groups in so-called menu
levels.
Depending on the device model some menu items are not available. For in-
stance, no switch points can be set on a device without contacts.
NOTICE
Parameter configuration on the PC
All the device settings can be made easily on the PC using the PC adapter. You
will need a Transmitter PC Interface and the associated PC software. For more
details, please refer to the Accessories section. The PC software makes all
parameters directly visible and accessible. Also, the entire configuration can be
loaded, saved and documented as a printout.
4.3 LC display
In normal mode, the current measured value of an input channel is shown on a
4-digit LC display. To show very large values, it is possible to switch to a 5 or 6-
digit presentation (see Parameter MB decimal place).
In the one-line presentation of the measured value, the display can be
'switched' to the respective other channel using the arrow
þ
. As soon as the
key is released, the originally display channel is shown again.
Fig.9: LC display 2SP
The unit is shown to the right of the measured value. If the device is equipped
with contacts, a closed contact is always symbolised by an inverted text "SP1"
or "SP2". One exception is the 1-channel bar chart diagram. Here, the switching
points are symbolised with simple numbers "12".
Various colours can be selected for the back lighting. Depending on the meas-
ured value, the colour of the back lighting can be automatically changed. This
can be used e.g. to depict good/poor differences. The back lighting can also be
deactivated.
The measured value can also be shown in a bar chart. The measured value is
also shown in smaller pictures as a number.
During the programming, the menu items and the associated parameters are
shown on the display. The device continues to function whilst the parameters
are being set; apart from one exception, the changes come into effect instantly.
The exception here is a change of switching times - here the previously valid
time must have run down.
(a) Operating mode differential pressure:
In this operating mode, the first channel is assigned to the differential pressure
measurement. The second channel of the pressure measurement P+. Accord-
ing to this assignment, the measured values are shown (see Fig.). There is also
an option for displaying all values, however it is then not possible to show a bar
chart.

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(b) Operating mode 2-channel
In this operating mode, the first channel is assigned to the differential pressure
(P+). The second channel of the pressure measurement (P-). According to this
assignment, the measured values and the channel numbers (ch1) and (ch2) are
shown.
1 input channel
2 input channels
All values
(only differential pressure)
1 4 5
23
Fig.10: LC display
1 Measured value 2 Unit
3 Input signal assignment 4 Status display of the switch
points
5 Bar chart
4.4 Keyboard
Fig.11: Operating keys [LC display]
1 Page down menu Reduce value
2 Call up menu Save value
3 Page up menu Increase value
The individual menu items and parameters can be displayed using the buttons
þ
and
ÿ
. The respective menu item is selected or the parameters for making
changes are called up via the button
û
.

4 | Start-up FISCHER Mess- und Regeltechnik GmbH
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If a parameter can be changed, the display flashes. The change is made via the
buttons
þ
and
ÿ
. The value is saved with the button
û
.
To leave a menu level or the entire menu, select the parameter "Menu level
Quit" and press
û
.
Example: Switch-on point set switchpoint 1
In normal mode, press the button
û
to enter the menu. The menu level Switch
points appears. Press the enter key
û
again to call up the display parameter.
The first parameter SP 1 On is displayed. To change this parameter, press the
button
û
again.
The device jumps to the input:
• The parameter is stated in the 1st line.
• The value that is to be changed is shown in the 2nd line, the display flashes.
• The input limits are displayed in the 3rd line (if there is one).
The required value is set with the buttons
þ
and
ÿ
and then confirmed with
û
.
4.5 Menu levels
End
menu level
Menu Level
Switch points
Menu Level
Input
Menu Level
Measuring
Menu Level
Output
Menu Level
Function
Menu Level
Display
Menu Level
System
End
menu level
Receipt
Outlet
Outlet
Menu level
Function 2
Only in the operating mode
2-channel
Fig.12: Menu levels

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4.5.1 Menu Level Switch points (2SP)
Parameter name Description Value range
SP1 On Switch point 1 On MBA-50% … MBE+50%
SP1 Off Switching point 1 off MBA-50% … MBE+50%
SP1 delay Switching point 1 delay 0…1800 s
SP1 Function Switching point 1 function NO, NC
Assignment SP Channel assignment Channel 1, 2 and 1+2
SP2 On Switch point 2 On MBA-50% … MBE+50%
SP2 Off Switching point 2 off MBA-50% … MBE+50%
SP2 delay Switching point 2 delay 0…1800 s
SP2 Function Switching point 2 function NO, NC
The two switching outputs are configured by four parameters respectively.
For the switch point 1 these are:
•SP1 On
•SP1 Off
•SP1 delay
•SP1 Function
Accordingly for switch point 2:
•SP2 On
•SP2 Off
•SP2 delay
•SP2 Function
The function of the individual parameters is explained for both switch points us-
ing Switch point 1 as an example.
SP1 On defines the activation point, SP1 Off the deactivation point of switching
output 1. The values are shown in the valid unit and set accordingly. The values
are shown in the valid unit and set accordingly. Both parameters can be set in-
dependently over the entire value range.
The value range ranges from MBA – 50% to MBE + 50%. MBA stands for start
of measuring range and MBE for the end of the measuring range.
Example: Measuring range = 0 … 100 %
The value range for this measuring range is -50 % … +150 %.
Function of the switch points
Together, the two parameters SP1 On and SP1 Off determine the switch func-
tion of switching output 1:
• If SP1 On > SP1 Off, the output switches on, if the measured value ex-
ceeds SP1 On. It is only switched off again if the measured value SP1 Off is
undercut (hysteresis function).
• If SP1 On = SP1 Off, the output switches on if the measured value exceeds
SP1 On and off if the measured value undercuts the same value (SP1 Off).
• If SP1 On < SP1 Off, the output switches on, if the measured value lies
within these switch points: i.e:
SP1 On < Measured value < SP1 Off (window function).
SP1 Delay allows the reaction of the switch output 1 to be delayed by between
0 and 1800 s. This parameter applies equally for switching on and off.
SP1 Function changes the function of the switching output 1. It is possible here
to define whether the contact should work as a open contact (NO) or a break
contact (NC).

4 | Start-up FISCHER Mess- und Regeltechnik GmbH
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Assignment SP is used to define the input to which the contacts are assigned.
The following options are available:
• Channel 1
Both contacts are assigned to channel 1.
• Channel 1, channel 2
A contact is assigned to every channel.
Channel 1: SP1
Channel 2: SP2
• Channel 2
Both contacts are assigned to channel 2.
The unit and the input range are adapted accordingly when entering the switch
points.
4.5.2 Menu Level Input
Operating mode Channel 1 Channel 2
Differential pressure Differential pressure (dP) Pressure (P+)
2-channel Pressure (P+) Pressure (P-)
Channel 1: Parameter name Description Value range
Absorption Damping 0…100 s
Offset corr. Offset correction ⅓ basic measuring
range
Zero-pt. wind. Zero-point window ⅓ basic measuring
range
Channel 2: Parameter name Description Value range
Absorption 2 Damping 0…100 s
Offset corr. 2 Offset correction ⅓ basic measuring
range
Zero-pt. wind.2 Zero-point window ⅓ basic measuring
range
The parameters for both channels are set in the same way. The following ex-
plains the parameters for the first channel as an example for both channels.
If there are unsteady measurement readings during operation, you can use the
parameters Absorption and Zero-pt. wind. to stabilize the reading (and the
output signal).
The parameter Absorption functions like a capillary throttle. However, it only
acts on the display, output signal and switch points (if these exist) but not on the
measuring cell itself.
You can set the response time to measuring value jumps in the range 0.0 to
100 s.
NOTICE
Response time
At maximum damping, it can take over 2 minutes until after a measurement
jump from 100% to 0% is also shown as zero in the display.
In many cases, unsteady readings are not a problem during normal operating
mode, but this is not true for the idle state, i.e. if a measured value of zero is ex-
pected. The parameter Zero-pt. wind. is designed to solve this. Its value
defines a range around zero at which the measured value is set to zero (see
fig.).

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The display only stops showing zero when the measurement leaves the set win-
dow. When reaching double the value, the measured value and the reading
match again. This avoids jumps in the display.
Measured Value
Display value
-x-2x x 2x
Zero-point window
Fig.13: Zero-point window
It may be necessary to set the offset to correct the impact of the installation
poistion.
Select the Offset corr. parameter and correct the reading using the buttons
þ
or
ÿ
until zero is shown in the display.
When setting the offset, the current measured value is displayed. The zero-
point window is not active during the offset setting.
4.5.3 Menu Level Measurement
Depending on the selected operating mode, the 'Measuring' menu is shown dif-
ferently.
Differential pressure: Parameter
name
Description Value range
MB start Measuring range start Basic measuring range
MB end Measuring range end Basic measuring range
Unit Measuring range unit
Limit Measuring range limit yes, no
Mode Operating mode Differential pressure
2-channel
2-channel: Parameter
name
Description Value range
MB start Measuring range start channel1 Basic measuring range
MB end Measuring range end channel1 Basic measuring range
Unit Measuring range unit channel1
Limit Measuring range limit channel1+2 yes, no
Mode Operating mode Differential pressure
2-channel
MB start 2 Measuring range start channel2 Basic measuring range
MB end 2 Measuring range end channel2 Basic measuring range
Unit 2 Measuring range unit channel2

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The output signals of the transmitter primarily depend on the measured input
variables (channel 1 or channel 2). However, you have the option of adjusting
the output signals to a large extent to suit your requirements.
The operating mode parameter can be used to switch between the differential
pressure measuring and two-channel relative pressure measuring.
NOTICE
Change of the operating mode
After changing the operating type, some values (unit, spread, table function) are
reset to the default values.
These values need to be checked by the user and corrected if necessary, or
define the operating mode at the beginning of the configuration process.
The measuring range of channel 1 is configured by three parameters. In the 2nd
channel operating mode, channel 2 is configured analogue to the first channel.
The settings are more or less identical for both channels and are explained in
the following using channel 1 as an example.
NOTICE
Adjustment of the output signal
The basic measuring range (indicated on the type label) and the type of output
signal (voltage / current) are not variable.
The parameters MB start and MB end initially define the two measurements
between which the output signal will change at all. Both values are adjustable
across the entire basic measuring range. The set values also refer to the meas-
urement in the respective unit. However, the signal values (current / voltage) for
Start of measuring range and End of measuring range are fixed.
If MB start is smaller than MB end, this is called an increasing characteristic
curve; the output signal increases as the measurement increases.
If MB end is smaller than MB start, this is a decreasing characteristic curve and
the output signal decreases as the measurement increases.
The difference between the values MB start and MB end must be at least 10 %
of the basic measuring range.
You can select a unit other than the unit of the basic measuring range with the
parameter Unit. The user should remember however that not every unit is suit-
able. The conversion is automatic.
The parameter Limit allows the display, output and switching points to be lim-
ited to the range between Start of measuring range and End of measuring
range. If Limit is set to "no", those measured values that are greater or smaller
than the end values are shown. In the 2-channel operating mode, the limitation
impacted on both channels.
4.5.4 Menu Level Output
The type of output signal (0/4…20 mA, 0…10V) must be stated on the order
and cannot be changed.
(a) Operating mode differential pressure:
There are two output signals available. Output 1 (Sig1) is permanently assigned
to the differential pressure signal (dP). An assignment can be defined for output
2 (Sig2) using the parameter Assignment out 2. This parameter only appears
in this operating mode,

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(b) Operating mode 2-channel
There are two output signals available. Output 1 (Sig1) is permanently assigned
to the pressure at input (P+) and output 2 (Sig2) is permanently assigned to the
pressure at input (P-).
Output 1 (Sig1) Parameter name Description Value range
min. output min. output 1
0.0 … 21.0 mA or
0.0 … 11.0 V
max. output max. output 1
Error signal Error signal 1
Output 2 (Sig2) Parameter name Description Value range
min. output 2 min. output 2
0.0 … 21.0 mA or
0.0 … 11.0 V
max. output 2 max. output 2
Error signal 2 Error signal 2
Only operating mode dif-
ferential pressure:
Assignment Out 2 Assignment output 2 dP, P+, P-, function
The parameter Assignment out 2 can define which signal is to be issued on
the 2nd analogue output. In the case of the latter 'Function' assignment, the set-
tings in the function menu for the 2nd analogue output are used.
Both outputs are configured in the same way, which is why this is only ex-
plained for the first output.
The parameters min. output, max. output and error signal define the limits of
the output signal that may not be undercut or exceeded regardless of the meas-
ured variable. The limit values take priority over the range defined by the MB
start and MB end parameters! These parameters primarily serve to prevent er-
ror messages in downstream systems caused by brief overstepping of measur-
ing ranges.
The parameter Min. output is usually only used for devices with an output sig-
nal 4…20 mA because frequently values of below 3.8 mA are evaluated as er-
ror signals.
The Max. output value can be used for the voltage and current to limit the max-
imum value.
The value defined via the parameter Error signal is issued if the device detects
an internal error and can no longer work correctly. It should be noted here that
not all potential errors and faults can be detected by the device itself.
4.5.5 Menu Level Function
The Function menu level is a variable menu whose appearance depends on the
value of the Function parameter. There are linear, square rooted and table func-
tions
NOTICE
Operating mode
In the differential pressure operating mode, only the Function menu level ap-
pears whilst in the 2-channel operating mode a further Function 2 menu level
appears.
Linear function
The input signal is linear before being sent to the display and the output. The
range defined in the menu "Measuring" serves as the measuring range. If the
function LINEAR is active, the other menu items are cancelled.
Parameter name Description Value range
Function Function Value = linear

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Square rooted function
Here, the input signal is square rooted before being sent to the display and the
output. A free unit can be defined for the display. To do this, the start and end of
the display range and the number of decimal points are defined. It is also pos-
sible to define the unit with 4 characters.
Parameter name Description Value range
Function Function Value = square
rooted
MB decimal pl. Measuring range
decimal places
1234, 123.4, 12.34,
1,234, 12345, 123456
MB start Measuring range start -9999 … +9999
MB end Measuring range end -9999 … +9999
MB unit Measuring range unit 4 characters
The following section contains descriptions of the parameters MB decimal pl.,
MB start, MB end and MB unit to describe the table function.
Tables function
This function allows free adjustment of the input variable to the display and out-
put via a table with up to 30 support points. A value pair comprising a measured
value and display value is issued for every support point.
NOTICE
Change of parameter
When switching from TABLE to another function, the table is initialised again
and the existing values are lost.
Parameter name Description Value range
Function Function Value = Table
MB decimal pl. Measuring range
decimal places
1234, 123.4, 12.34,
1,234, 12345, 123456
MB start Measuring range start -9999 … +9999
MB end Measuring range end -9999 … +9999
MB unit Measuring range unit 4 characters
No. of pairs Number of pairs n = 3…30
Value pair1 Value pair 1
MB-start … MB-end
Value pair2 Value pair 2
Value pair3 Value pair 3
∙∙∙
Value pair30 Value pair 30
The display range is defined with the parameters MB decimal pl., MB start and
MB end. The user can select the configuration freely.
Using the parameter MB decimal pl., it is possible to select between a 5 or 6-
digit presentation. The resolution is not increased. Only an extra zero or two
zeros are added. This serves the correct display of larger values. The measur-
ing range must be positive for the 6 digit presentation.
The MB unit gives the user the option of defining a completely independent
unit. Letters, numbers or special characters can be used. The unit can be max.
4 characters long.
If the function TABLE is selected, then it is also necessary to state the No. of
pairs. It is defined here how many pairs of values (support points) are used in
the table. A table is made up of at least 3, max. 30 support points.