FISCHER DA01 VUW ATEX User manual

Operating manual
DA01 VUW
Differential pressure measuring device
Pressure levels PN250/PN400
Standard version
09015042 • BA_EN_DA01_VUW • Rev. ST4-A • 02/18 *09015042*

| Masthead FISCHER Mess- und Regeltechnik GmbH
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Masthead
Manufacturer: FISCHER Mess- und Regeltechnik GmbH
Bielefelderstr. 37a
D-32107 Bad Salzuflen
Telefon: [phone]
Telefax: [phone]
eMail: [email protected]
web: www.fischermesstechnik.de
Technical editorial team: Documentation representative: S. Richter
Technical editor: R.Kleemann
All rights, also those to the translation, reserved. No part of these instructions
may be reproduced or processed, duplicated or distributed using electronic sys-
tems 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 11/15 Version 1 (first edition)

FISCHER Mess- und Regeltechnik GmbH Table of Contents
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Table of Contents
1 Sicherheitshinweise .......................................................................................................................................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 Equipment versions ..................................................................................................................................6
2.3 Function diagram ....................................................................................................................................11
2.4 Design and mode of operation................................................................................................................11
3 Assembly.......................................................................................................................................................12
3.1 General information ................................................................................................................................12
3.2 Process connection ................................................................................................................................12
3.3 Electrical connections .............................................................................................................................13
4 Commissioning.............................................................................................................................................15
4.1 General ...................................................................................................................................................15
4.2 Venting of the pressure lines ..................................................................................................................15
4.3 Zero point correction...............................................................................................................................16
4.4 Switch point setting.................................................................................................................................16
5 Servicing .......................................................................................................................................................17
5.1 Maintenance ...........................................................................................................................................17
5.2 Transport ................................................................................................................................................17
5.3 Service....................................................................................................................................................17
5.4 Disposal ..................................................................................................................................................17
6 Technical Data ..............................................................................................................................................18
6.1 Allgemeines ............................................................................................................................................18
6.2 Input variables ........................................................................................................................................19
6.3 Operating conditions...............................................................................................................................19
6.4 Construction design ................................................................................................................................20
7 Order Codes..................................................................................................................................................27
7.1 accessories.............................................................................................................................................29
8 EU Declarations of conformity ....................................................................................................................30
9 EAC Declaration ...........................................................................................................................................32

1 | Sicherheitshinweise FISCHER Mess- und Regeltechnik GmbH
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1 Sicherheitshinweise
1.1 General
WARNING
This operating manual contains instructions fundamental to the installation, op-
eration and maintenance of the device that must be observed unconditionally. It
must be read by the assembler, operator and the specialized personnel in
charge of the instrument before it is installed and put into operation.
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
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2 Product and functional description
2.1 Delivery scope
• Differential pressure measuring device DA01
• Operating Manual
2.2 Equipment versions
The following illustrations depict typical combinations of the measuring cell,
measured value display and contact elements. However, these can be freely
combined according to the order code. Wherever this is not possible, this is
clearly stated.
For instance, a small measuring cell with an NG160 display and a contact ele-
ment is also available.
Large measuring cell Ø130 Small measuring cell Ø75
NG100
NG160
(mbar ranges) (bar ranges)
Fig.1: Device overview
2.2.1 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
Flange connection
based on DIN 615018
with internal thread G½
G½ G½ G½ G½
G½
Fig.2: Options for the process connection

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2.2.2 Nameplate
2.2.3 Contact elements
Low-action contacts
Snap-actiocontacts
Inductive contacts
KINAX 3W2 708-226D0
KINAX 3W2 708-226E0
for standard devices
Snap-action contacts
Inductive contacts
for ATEX devices
KINAX 3W2 708-226D0
KINAX 3W2 708-226E0
Rotation angle encoder in accordance
with data sheet KE09
Limit switch in accordance with
data sheet KE##
Fig.3: Contact elements
2.2.4 Special functions
Marker needle
Trailing needle
Fluid fillings
Unit without contacts
Paraffin oil, glycerine, silicon oil
Unit with inductive contacts
Paraffin oil, silicon oil
Unit with low-action contacts
Paraffin oil, silicon oil
Units with magnetic spring contacts
Silicon oil
Fig.4: Special functions

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2.2.5 Assembly
Wall mounting Pipe mounting
Panel mounting set type 1 Panel mounting set type 2
with panel mounting set with front ring
Fig.5: Assembly
The panel installation fittings can only be used in devices with a small measur-
ing cell (Ø75) and a display in the NG100 bayonet ring casing.
WARNING
Panel mounting set
Due to the heavy weight, the operator needs to install a support construction for
installation of the front panel.
2.2.6 Equipment features (overview)
The following shows the configuration possibilities of the DA01 depending on
the measuring cell used and the pressure level.
Key
available
on request

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Small measuring cell Ø75
Measuring range
Measured value display Ø100
Inductive contacts
Rotation angle transducer Trailing needle Marker needle Remote seal
12312
0 ... 0.6 bar
0 ... 1 bar
0 ... 1.6 bar
0 ... 2.5 bar
0 ... 4.0 bar
0 ... 6bar
0 ... 10 bar
0 ... 16 bar
0 ... 25 bar
-1 ... 0.6 bar
-1 ... 1.5 bar
-1 ... 3 bar
Snap-action contacts
-1 ... 5 bar
123
Low-action contacts
Pressure levelPN250/PN400
Fig.6: Small measuring cell Ø75 Measured value display Ø100
Measuring range
Measured value display Ø160
Inductive contacts
Rotation angle transducer Trailing needle Marker needle Remote seal
12312
0 ... 0.6 bar
0 ... 1 bar
0 ... 1.6 bar
0 ... 2.5 bar
0 ... 4.0 bar
0 ... 6bar
0 ... 10 bar
0 ... 16 bar
0 ... 25 bar
-1 ... 0.6 bar
-1 ... 1.5 bar
-1 ... 3 bar
Snap-action contacts
-1 ... 5 bar
123
Low-action contacts
Pressure levelPN250/PN400
Fig.7: Small measuring cell Ø75 Measured value display Ø160

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Large measuring cell Ø130
-100 ... +250 mbar
Measuring range
Inductive contacts
Rotation angle transducer Trailing needle Marker needle Remote seal
12312
0 ... 40 mbar
0 ... 60 mbar
0 ... 100 mbar
0 ... 160 mbar
0 ... 250 mbar
0 ... 400 mbar
-40 ... +60 mbar
-60 ... +100 mbar
-100 ... +150 mbar
Snap-action contacts
123
Low-action contacts
Pressure level
PN250
Measured value display Ø100
Fig.8: Large measuring cell Ø130 Measured value display Ø100
-100 ... +250 mbar
Measuring range
Inductive contacts
Rotation angle transducer Trailing needle Marker needle Remote seal
12312
0 ... 40 mbar
0 ... 60 mbar
0 ... 100 mbar
0 ... 160 mbar
0 ... 250 mbar
0 ... 400 mbar
-40 ... +60 mbar
-60 ... +100 mbar
-100 ... +150 mbar
Snap-action contacts
123
Low-action contacts
Pressure level
PN250
Measured value display Ø160
Fig.9: Large measuring cell Ø130 Measured value display Ø160

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2.3 Function diagram
1
2
3
4
5
6
7
88
7
Fig.10: Function diagram
1 Motion train 2 Transfer lever
3 Measuring shaft 4 Pressure transfer fluid
5 Separating membrane 6 Connecting rod
7 Measuring diaphragm 8 Pressure chamber
2.4 Design and mode of operation
The pressures in the pressure chambers that are to be compared are each ex-
erted onto a measuring membrane that can be rigidly connected using a con-
nection rod. To compensate the static pressure, the space between the separat-
ing and measuring membrane is filled with a pressure transfer fluid.
During pressure equalisation, the two measuring membranes are in an idle pos-
ition. In case of pressure difference, the force acting on the membranes causes
it to be moved towards the side of the lower pressure.
The connecting rod transfers the deflection of the measuring membranes onto
the transfer lever mounted to the measuring shaft. Proportional to the current
differential pressure, the measurement shaft makes a rotational movement that
the indicator translates into a rotation angle between 0 and 270°.
In the case of one-sided pressure by the measuring system above and beyond
the measuring range, the over-pressure guard will be activated which supports
the overlosaded membrane.

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3 Assembly
3.1 General information
The device can be mounted in one of the following ways (see Assembly):
1. Wall mounting
The device is designed for installation onto flat assembly plates. The unit is
equipped with a wall mounting plate for this mounting type.
2. Pipe assembly
The device is equipped with a special pipe assembly set and is suitable for
mounting to a 2" pipe (DN50).
3. Panel mounting
Panel mounting is available in two installation models.
–Panel mounting fittings (Type 1)
This variant is only suitable for models with a small measuring system
(Ø75) and a bayonet ring casing NG100.
–Panel installation with front ring (Type 2)
All models are suitable for this variant. A suitable steel construction
must be used to ensure that the front plate can bear the weight of the
DA03. This is possible e.g. by means of a combination with the wall or
pipe assembly.
At the factory, the device is calibrated for vertical installation, but the installation
position is arbitrary. For any installation positions that are not vertical, the zero-
point signal can be corrected via the installed offset correction.
To ensure safety during installation and maintenance, we recommend installing
a suitable shut-off valve on the system (see accessories).
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. [}15].
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.

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+
Fig.11: Process connection
The process connections are marked with (+) and (-) symbols on the device.
The pressure lines must be mounted according to these symbols.
Differential pressure
Higher pressure
lower pressure
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 plug
1
2
3
4
5
6
M20 x 1.5
Fig.12: Cable socket
1 Lower part 2 Sealing ring EPDM
3 Middle part 4 Sealing ring EPDM
5 Lid 6 Lid screw
1
2
5
6
3
4
4
Fig.13: HAN connector
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

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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.14: 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.15: 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.
123
RL
+
-
Eb= 12 ... 30V
123
RL
+
-
~
+
-
~
+
-
2-Wire 3-Wire
Fig.16: Rotation angle transducers connection

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4 Commissioning
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 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, turn the venting
screw anticlockwise as far as it will go.
Venting screw
Closing screw0.8 x 4
Fig.17: Venting valve
4.2 Venting of the pressure lines
WARNING
Risk connected to pressure
Never remove the venting screw if the unit is still pressurised! Close the shut-off
valves of the flanged fittings or depressurize the system.
The pressure lines need to be vented for before commissioning on devices that
work with fluid media. Proceed as follows:
• Remove the venting screws of the two pressure chambers.
• Carefully increase the system pressure until the fluid level is 5 mm below
the sealing surface of the threaded borehole.
• Close the device with the venting screws
Venting screws
5
Seal (FKM)
Fig.18: Venting with fluid media

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4.3 Zero point correction
The differential pressure measuring units are set in the factory before delivery
so that they do not usually need to be adjusted at the assembly site. If this is
still necessary, proceed as follows:
• Depressurize the measuring chamber (+) und (-) side or only exert the exist-
ing static system pressure.
• Remove the closing screw The zero point correction screw is located be-
hind.
• Set the measurement value pointer to the scale zero point using the zero
point correction screw.
• Mount the closing screw
Without fluid filling With fluid filling
Closing screw 11
1.2 x 7
Fig.19: Zero point correction screw
4.4 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.20: 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.

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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
WARNING
Incorrect disposal may pose a risk to the environment.
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 Allgemeines
EXECUTION Nominal
pressure
Measuring
cell
Application information
DA01 V … PN250 Ø75 Measuring ranges: 0…0.6 bar to 0…25 bar
Remote seals:
It is possible to attach remote seals for all measuring ranges. The re-
mote seals need to be designed for the displacement volume, the
length of the cable and the application temperature.
DA01 U … PN400 Ø75 Measuring ranges: 0…0.6 bar to 0…25 bar
Remote seals:
It is possible to attach remote seals for all measuring ranges. The re-
mote seals need to be designed for the displacement volume, the
length of the cable and the application temperature.
DA01 W … PN250 Ø130 Measuring ranges: 0…40 mbar to 0…400 bar
Limitations:
Drag indicator measuring ranges ≥ 60 mbar
Contacts / Transmitter measuring ranges ≥ 100 mbar
Remote seals:
It is possible to attach remote seals for measuring ranges ≥ 160 mbar.
The remote seals need to be designed for the displacement volume,
the length of the cable and the application temperature.

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6.2 Input variables
Measuring variable
Differential pressure in gaseous and fluid aggressive media.
General
Rated pressure of the measuring
system
Max. static operating pressure
Durability One-sided over-pressure-proof up to the
rated pressure of the measuring system
resistance to under-pressure on the (+) and
(-) side
Measurement accuracy ±1.6 % of the measuring range
Temperature sensor 0.3 % / 10 °C
Zero-point adjustment ±25 % of the measuring range
Measuring ranges
Small measuring cell
Ø75
Measuring range Device model
V U W
0 … 0.6 bar ● ●
0 … 1 bar ● ●
0 … 1.6 bar ● ●
0 … 2.5bar ● ●
0 … 4.0 bar ● ●
0 … 6 bar ● ●
0 … 10 bar ● ●
0 … 16 bar ● ●
0 … 25 bar ● ●
-1 … 0.6 bar ● ●
-1 … 1.5 bar ● ●
-1 … 3 bar ● ●
-1 … 5 bar ● ●
Large measuring cell
Ø130
Measuring range Device model
V U W
0 … 40 mbar ●
0 … 60 mbar ●
0 … 100 mbar ●
0 … 160 mbar ●
0 … 250 mbar ●
0 … 400 mbar ●
0 … 600 mbar ●
6.3 Operating conditions
Permissible ambient temperature -20 … +80 °C
Admissible storage temperature -40 … +80 °C
Admissible media temperature Max. 100 °C
Type of protection: IP 65 acc. to EN 60529

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6.4 Construction design
Materials
Measured value display Material Material no.
EU AISI
Bayonet ring housing NG100, NG160 CrNi steel 1.4301 304
Process connection (all models) CrNi steel 1.4404 316L
Intermediate plate AlMgSiPb HARD-COAT®
Seals (O-rings) FKM
Motion train CrNi steel
Dial face and needle Aluminium, painted, printed
Inspection disk Safety laminated glass
MB = Measurement
range
Materials (media-contacting)
Design of the measuring system (R) Material Material no.
EU AISI
Pressure caps CrNi steel 1.4404 316L
Separation membranes CrNi steel 1.4571 361Ti
Design of the measuring system (G) Material Material no.
EU AISI
Pressure caps CrNi steel 1.4404 316L
Separation membranes Hastelloy® C276
Process connection Material Material no.
EU AISI
Connecting piece and port CrNi steel 1.4404 316L
Cutting ring screw connections CrNi steel 1.4571
Assembly
Wall mounting Flanged assembly plate
Pipe mounting Flanged assembly plate and attachment bracket
Panel mounting set
type 1
Panel installation fittings for units with a small measuring
cell (Ø75) and NG100 bayonet ring casing.
Panel mounting set
type 2
Front ring and support construction