FISCHER DA09 series User manual

Operating manual
DA09
Differential pressure measuring unit
Pressure levels PN10/PN25
Diaphragm manometer
CrNi-steel model
09015018 • BA_EN_DA09_EG • Rev. ST4-F • 10/21 *09015018*

| Masthead FISCHER Mess- und Regeltechnik GmbH
2/32 BA_EN_DA09_EG
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 02/18 Version 1 (first edition)
Rev. ST4-B 09/19 Version 2 (new accessories)
Rev. ST4-C 10/19 Version 3 (Correction order code/technical data)
Rev. ST4-D 07/20 Version 4 (Correction encoder connection)
Rev. ST4-E 11/20 Version 5 (INCONEL diaphragm from 10 bar)
Rev. ST4-F 10/21 Version 6 (UKCA Declaration)

FISCHER Mess- und Regeltechnik GmbH Table of Contents
BA_EN_DA09_EG 3/32
Table of Contents
1 Safety information ........................................................................................................... 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........................................................................................... 5
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
2.6 Nameplate .............................................................................................................................. 8
3 Assembly.......................................................................................................................... 9
3.1 General................................................................................................................................... 9
3.2 Process connection ................................................................................................................ 9
3.3 Electrical connections............................................................................................................. 10
4 Commissioning................................................................................................................ 12
4.1 General................................................................................................................................... 12
4.2 Zero point correction............................................................................................................... 12
4.3 Switch point setting................................................................................................................. 13
5 Servicing........................................................................................................................... 14
5.1 Maintenance ........................................................................................................................... 14
5.2 Transport ................................................................................................................................ 14
5.3 Service.................................................................................................................................... 14
5.4 Disposal.................................................................................................................................. 14
6 Technical Data ................................................................................................................. 15
6.1 General................................................................................................................................... 15
6.2 Input variables ........................................................................................................................ 15
6.3 Measurement accuracy .......................................................................................................... 16
6.4 Operating conditions............................................................................................................... 16
6.5 Construction design................................................................................................................ 16
7 Order Codes ..................................................................................................................... 24
7.1 Accessories ............................................................................................................................ 26
8 Attachments ..................................................................................................................... 27
8.1 EU declarations of conformity................................................................................................. 27
8.2 UKCA Declarations of Conformity .......................................................................................... 29
8.3 EAC Declaration..................................................................................................................... 31

1 | Safety information FISCHER Mess- und Regeltechnik GmbH
4/32 BA_EN_DA09_EG
1 Safety information
1.1 General
This operating manual contains basic instructions for the installation, operation
and maintenance of the device that must be followed without fail. It must be
read by the installer, the operator and the responsible specialist personnel be-
fore installing and commissioning the device.
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.

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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.
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).
1. 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).
1. 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).
1. 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
6/32 BA_EN_DA09_EG
2 Product and functional description
2.1 Delivery scope
• Diaphragm manometer DA09
• Operating Manual
2.2 Intended use
The diaphragm manometer DA09 serves to measure and display differential
pressures in gaseous, fluid and aggressive media. The unit is completely made
of CrNi-steel and is suitable for use in aggressive environments. If used with ag-
gressive media, the media compatibility with the materials used must be
checked (see Techn. data).
The DA09 can be delivered with a contact element. If the set limit values are ex-
ceeded, the output power circuits are opened or closed, and/or a 0/4…20 mA
output signal proportional to the displayed value is issued for a capacitive rota-
tion angle encoder.
2.3 Function diagram
+
4
3
2
1
Fig.1: Function diagram
1 Measuring diaphragm 2 Bellows
3 Tie rod 4 Motion train
2.4 Design and mode of operation
The measuring system comprises a diaphragm and two separate pressure
chambers. Differential pressure between the chambers causes axial movement
of the diaphragms. A tie rod transfers this movement to an indicator.
The seal between the pressure chamber and tie rod is realised with metal bel-
lows. To compensate the static operating pressure, the measuring system is
symmetrical.

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2.5 Equipment versions
The illustrations are just examples. The equipment features can be combined
according to the order code.
Bayonet ring casing NG100 Bayonet ring casing NG160
bar measuring system
mbar measuring system
Process connection
with external thread
Process connection
with internal thread
Fig.2: Equipment versions NG100, NG160
Type plate
+ wiring diagram
Cable socket
Electr. auxiliary equipment
e.g. rotation angle transducer
Process connection
with G¼ inner thread
Fig.3: Equipment versions additional equipment

2 | Product and functional description FISCHER Mess- und Regeltechnik GmbH
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2.6 Nameplate
This type plate serves as an example of the information that is stated. The data
shown is purely fictive, but does correspond to the actual conditions. For more
information, please see the order code at the end of these instructions.
Circuit diagram
Techn. Data
Measuring range
P max.
Overload
Contact function
Prod. no. AB1809105.02.016
0 ... 10 bar
40 bar
KE20M110B4H2
max. 40 bar
Serial number
Order code
Item no. DA0907HM11S0000CL010
Conformity
CE, UKCA, EAC ...
Fig.4: Type plate

FISCHER Mess- und Regeltechnik GmbH Assembly | 3
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3 Assembly
3.1 General
The device can be mounted in one of the following ways:
1. Direct assembly
The unit is suitable for direct assembly to pressure lines. The unit weight de-
pends on the design. A suitable support construction may be needed.
2. Wall mounting
The unit is equipped with a wall holder and is suitable for mounting to
mounting plates and even walls.
3. Pipe assembly
The device is equipped with a special pipe assembly set and is suitable for
mounting to a 2" pipe (DN50).
Wall mount Pipe assembly
Fig.5: Assembly types
3.2 Process connection
• By authorized and qualified specialized personnel only.
• The pipes need to be depressurized when the instrument is being connec-
ted.
• Appropriate steps must be taken to protect the device from pressure surges.
• Check that the device is suitable for the medium being measured.
• Maximum pressures must be observed (cf. Tech. data)
All supply lines are arranged so that there are no mechanical forces acting on
the device.
The pressure lines must be kept as short as possible and installed without any
tight bends to avoid delays.
The pressure lines must be installed at an inclination so that when fluids are
measured no air pockets are created or when measuring gases, no water pock-
ets are created. If the required inclination is not reached, water or air filters must
be installed at suitable places.
The pressure lines need to be vented for fluid measuring media.
If water is used as a measuring medium, the unit must be protected against
frost.
If the pressure sensing lines are already pressurised at the time of commission-
ing, zero-point control and adjustment cannot be performed. In such cases, the
device should be only connected to the mains without the pressure sensing
lines.
The process connections are marked on the unit with (+) and (-) symbols. The
pressure lines are to be mounted according to this marking.

3 | Assembly FISCHER Mess- und Regeltechnik GmbH
10/32 BA_EN_DA09_EG
Differential pressure
Higher pressure
lower pressure
The following options are available for the process connection:
1/4-18 NPT
1/2-14 NPT
1/4-18 NPT
1/2-14 NPT
Inner thread Outer thread Cutting ring-
screw connection
12 mm tube
G½ G½ G½ G½
G½ +
Fig.6: Process connection
3.3 Electrical connections
• 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.
Only devices with contact elements are connected to the electrical supply. To
this end there is a cable socket on the side of the device, or a HAN plug in the
power plant version.
3.3.1 Cable socket / HAN 7D
1
2
3
4
5
6
M20 x 1.5
Fig.7: Cable socket
1 Lower part 2 Sealing ring EPDM
3 Middle part 4 Sealing ring EPDM
5 Lid 6 Lid screw

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1
2
5
6
3
4
4
Fig.8: HAN 7D
1 Cable screw connection M20 x 1.5 2 Sleeve housing Han 3A
3 Socket insert Han 7D 4 Pin insert Han 7D
5 Safety clip 6 Attachment casing Han 3D
3.3.2 Contact elements
Contact elements are supplied in accordance with data sheet KE. This illus-
trates all variants, their pin assignment and the technical data.
1234
1 2
1234
123
Fig.9: Contacts
Creep and magnetic spring contacts
The terminal numbers always correspond to the contact number an are as-
signed to the target indicators from left to right. Up to three contacts can be
used. There are assigned to the target indicators as follows:
1. For 2 contacts
Contact 1: left target indicator
Contact 2:right target indicator
2. For 3 contacts
Contact 1: left target
Contact 2: middle target
Contact 3: right target
1234
-+-+
1 2
Eb= 5 ... 25V
Fig.10: Inductive contacts
Inductive contacts
In the case of inductive contacts, the switch function is not only determined by
the slot type initiator but also by the switch amplifier. Up to max two contacts
can be used. There are assigned to the target indicators as follows:
Contact 1: left target indicator
Contact 2:right target indicator.
3.3.3 Rotation angle transducers KINAX 3W2
The rotation angle encoder serves to record angular positions, to prepare and
provide the measured values as electrical output signals 0/4…20mA for the
following device. Rotation angle encoder is supplied in accordance with data
sheet KE09. This contains further information about the pin assignment and the
technical data.
Ub= 12 ... 30V
2-Wire 3-Wire
1 2
RL
+
-
1 24
RL
+
-
~
+
-
~
+
-
Fig.11: Rotation angle transducers connection

4 | Commissioning FISCHER Mess- und Regeltechnik GmbH
12/32 BA_EN_DA09_EG
4 Commissioning
4.1 General
Fig.12: Open vents
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 all pressure connections are free of leaks before commissioning.
In models filled with fluid, the venting valve on the upper side of the bayonet
casing must be opened before commissioning! To do this, remove the yellow
valve plug.
4.2 Zero point correction
The pressure measuring units are set in the factory before delivery so that they
do not usually need to be adjusted at the assembly site.
Any necessary zero-point correction is carried out as follows:
Venting valve
Valve plug
Zero-point correction screw
0.5 x 3
Fig.13: Zero point correction
1. Depressurize the pressure line and/or equalise both pressure lines and ex-
ert equally with the static pressure.
Fig.14: Vent closed
2. Open the venting valve as shown in the illustration and carefully remove the
entire valve plug from the casing.
3. Adjust the measurement value pointer using zero point correction screw to
the scale zero point.
4. Refit the valve plug into the casing.
5. Close the venting valve.
NOTICE!Please ensure that in models filled with fluid, the venting valve
must be opened during operation.

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4.3 Switch point setting
There is an adjustment lock attached to the front pane of the measuring unit on
units with contact elements. This means that the contacts attached to the target
indicators can be set to any point along the scale.
To facilitate switching precision and the service life of the mechanical measur-
ing system, the switching points should lie between 10% and 90% of the meas-
uring range.
1
2
3
4
5
6
Fig.15: Switch point setting
1 Adjustment key 2 Adjusting lock
3 Axle 4 Drive arm
5 Set-point display 6 Actual value display
Adjustment sequence:
• Press the axle inwards until the drive arm reaches behind the setting pin of
the target value indicator.
• Set the target value indicator to the required switch point by turning the set-
ting key.
• Relieve the axle.
• The switch-point setting can be secured against unintentional adjustment by
removing the attachment screw and the adjustment key.

5 | Servicing FISCHER Mess- und Regeltechnik GmbH
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5 Servicing
5.1 Maintenance
The instrument is maintenance-free. We recommend the following regular in-
spection to guarantee reliable operation and a long service life:
• Check the function in combination with downstream components.
• Check the leak-tightness of the pressure connection lines.
• Check the electrical connections.
The exact test cycles need to be adapted to the operating and environmental
conditions. In combination with other devices, the operating instructions for the
other devices also need to be observed.
5.2 Transport
The measuring device must be protected against impacts. It should be transpor-
ted in the original packaging or a suitable transport container.
5.3 Service
All defective or faulty devices should be sent directly to our repair department.
Please coordinate all shipments with our sales department.
WARNING
Process media residues
Process media residues in and ondismantled devices can be a hazard to
people, animals and the environment. Take adequate preventive measures. If
required, the devices must be cleaned thoroughly.
Return the device in the original packaging or a suitable transport container.
5.4 Disposal
Please help to protect the environment by always disposing of the work pieces
and packaging materials in compliance with the valid national waste and recyc-
ling guidelines or reuse them.

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6 Technical Data
6.1 General
Please also observe the order code here.
6.2 Input variables
Measuring variable
Absolute pressure for gaseous, fluid and aggressive media.
Measuring ranges [bar, mbar]
Measuring range PN Measuring range PN
0 … 0.6 bar 25 bar -1 … 0.6 bar 25 bar
0 … 1 bar 25 bar -1 … 1.5 bar 25 bar
0 … 1.6 bar 25 bar -1 … 3 bar 25 bar
0 … 2.5 bar 25 bar -1 … 5 bar 25 bar
0 … 4 bar 25 bar
0 … 6 bar 25 bar
0 … 10 bar 25 bar
0 … 16 bar 25 bar
0 … 25 bar 25 bar
0 … 25 mbar 10 bar -40 … 60 mbar 10 bar
0 … 40 mbar 10 bar -60 … 100 mbar 10 bar
0 … 60 mbar 10 bar -100 … 150 mbar 10 bar
0 … 100 mbar 10 bar -150 … 250 mbar 25 bar
0 … 160 mbar 10 bar
0 … 250 mbar 10 bar
0 … 400 mbar 25 bar
0 … 600 mbar 25 bar
Measuring ranges [kPa, PSI]
Measuring range PN Measuring range PN
0 … 2.5 kPa 10 bar 0 … 3 PSI 10 bar
0 … 4 kPa 10 bar 0 … 5 PSI 25 bar
0 … 6 kPa 10 bar 0 … 10 PSI 25 bar
0 … 10 kPa 10 bar 0 … 15 PSI 25 bar
0 … 16 kPa 10 bar 0 … 30 PSI 25 bar
0 … 25 kPa 10 bar 0 … 60 PSI 25 bar
0 … 40 kPa 25 bar 0 … 100 PSI 25 bar
0 … 60 kPa 25 bar 0 … 250 PSI 25 bar
0 … 100 kPa 25 bar 0 … 300 PSI 25 bar
0 … 160 kPa 25 bar
0 … 250 kPa 25 bar
0 … 400 kPa 25 bar
0 … 600 kPa 25 bar

6 | Technical Data FISCHER Mess- und Regeltechnik GmbH
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Pressure load
Idle load Scale upper value
Alternating load Scale upper value
Overload capability on one side (+) and
(-)
10 x Scale upper value ≤ PN
6.3 Measurement accuracy
Accuracy class 1.6
Characteristic curve deviation ± 1.6 % of the measuring range (FS)
Temperature influence (Reference +
20°C)
± 0.8 %FS / 10K
Influence of static pressure for
measuring ranges (MBR) < 250 mbar
≤ 0,1 % + 0,004 %
MBR [bar]
Influence of static pressure for
measuring ranges (MBR) ≥ 250 mbar
≤0,1 %
bar
6.4 Operating conditions
Permissible ambient temperature -20 … +80 °C
Admissible storage temperature -20 … +80 °C
Admissible media temperature ≤ 100 °C
Type of protection IP 66 acc. to EN 60529
6.5 Construction design
Materials
Material Material no.
Bayonet ring housing NG100, NG160 CrNi steel 1.4301, 1.4404
Safety housing CrNi steel 1.4404
Process connection CrNi steel 1.4404
Motion train CrNi steel
Dial face and needle Aluminium, painted, printed
Inspection disk Safety laminated glass
Parts in contact with the medium
Material Material no.
Pressure chamber CrNi steel 1.4404
Diaphragm MB ≤ 160 mbar CrNi steel 1.4571
Diaphragm MB ≥ 250 mbar and ≤ 6 bar NiCrCo alloy DURATHERM®
Diaphragm MB ≤ 10 bar NiCr. alloy INCONEL® 718
Bellows NiCr. alloy Alloy 625
Seal Metal seal
Process connection
Material Material no.
Connecting piece and port CrNi steel 1.4404
Cutting ring screw connections CrNi steel 1.4571

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Electrical connection
In the case of devices with additional electronic equipment, the connection is
realised using a cable socket attached to the side and/or with a Han 7D con-
nector on the power plant models. The pin assignment depends on the ordered
mode and is stated in the data sheet KE or KE09.
Cable socket
HAN 7D
Fig.16: Cable socket
Cable socket
Number of screw terminals 6 + 2PE
Rated current See data sheet KE
Rated voltage 250 V
Cable diameter up to 1.5 mm2 with wire protection
Cable screw connection M20 x 1.5, terminal range 7 … 13 mm
HAN 7D
No. of crimp contacts 7 + PE
Rated current See data sheet KE
Rated voltage 50 V
Cable diameter 1 mm2
Cable screw connection M20 x 1.5, terminal range 7 … 13 mm
Assembly
Direct assembly Mounted to the pipes
Wall mounting Flanged assembly plate
Pipe mounting Flanged assembly plate and attachment bracket
Mounting position Vertical
Weight Depending on the version 2,7 ... 7 kg

6 | Technical Data FISCHER Mess- und Regeltechnik GmbH
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Additional Attachments
Contact elements
Limit signal transmitters (contacts) and capacitive rotation angle transducers
with an output signal proportional to the angular position can be fitted into a
housing augmented by a corresponding bayonet ring connector.
A certain minimum pressure level is required to operate this kind of contact ele-
ment, which is why there is a lower limit for the mbar measuring ranges. This
limit depends on the model type and is stated in the section ‚General‘.
The measuring deviation increases by ±0.5% per contact when the contacts are
driven and switched.
For more information and the order key, please refer to the data sheet:
• for limit switch in data sheet KE
• for rotation angle converter in the data sheet KE09
Fluid charging
Under aggravated operating conditions, such as vibrations and extreme pres-
sure fluctuations, or in order to avoid condensation forming if used outdoors, the
casing can be filled with the following fluids depending in the type of contacts in-
stalled:
without contacts Paraffin oil, glycerine, silicon oil
Low-action contacts Paraffin oil, silicon oil
Magnetic spring contacts Silicon oil
Inductive contacts Paraffin oil
Rotation angle transducer no filling possible
Marker needle
A settable red marker can be attached to the scale to clearly show a certain
pressure (limit value).
Trailing needle
The railing needle is 'dragged' with the measured value indicator. As there is no
fixed connection between the two needles, one-off maximum values are stored.
The trailing needle can be reset using an adjusting dial in the window. Trailing
needles cannot be used in conjunction with contacts. A certain minimum pres-
sure level is required to move the drag indicator, which is why there is a lower
limit for the mbar measuring ranges. This limit depends on the model type and
is stated in the section ‚General‘.
Shut-off fitting
Three-spindle equalisation and shut-off valve DZ93 or four-spindle equalisation
and shut-off valve DZ94.
• Material 1.4404
• Functions: Shut-off, pressure compensation

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6.6 Dimensional drawings
All dimensions in mm unless otherwise stated
6.6.1 Standard version
D
H
l1
h1
Ø63
31
18
7.5
40.5
L
d1
Fig.17: Dimensional picture 25 ... 250 mbar
Measuring range 25…250 mbar
Housing Tol. D d1 H h1 L l1
NG100 ± 0.1 101 138 199 145 53 15.5
NG160 ± 0.1 161 138 259 175 53.5 16.5
Measuring ranges 0.4 … 25 bar
Housing Tol. D d1 H h1 L l1
NG100 ± 0.1 101 81 198 144 53 15.5
NG160 ± 0.1 161 81 258 174 54.5 16.5

6 | Technical Data FISCHER Mess- und Regeltechnik GmbH
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6.6.2 Tube and wall mounting
The dimensions stated apply for all housing models. The example shown is a
bayonet ring housing NG160.
Tube assembly
wall mounting
100
73 ± 0.1
100 A
B
A B
25 ... 250 mbar
0.4 ... 25 bar
110.4 83
81.954.5
Measuring range
Ø62
2'' tube
22
30
M8
Ø11
sleeve with
M8 screw
18
Tol.
± 0.1
± 0.1
Fig.18: Tube and wall mounting