WIKA 732.15.160 User manual

EN
DE
FR
ES
Example: Model 712.15.160 with transmitter and compact valve
manifold with working pressure indication
Cryo Gauge
Dierential pressure gauge, models 712.15.160, 732.15.160,
optional for hazardous areas
Dierenzdruckmanometer, Typen 712.15.160, 732.15.160,
optional für explosionsgefährdete Bereiche
Manomètre diérentiel, types 712.15.160, 732.15.160,
en option pour zones explosives
Manómetro de presión diferencial, modelos 712.15.160, 732.15.160,
opcional para zonas potencialmente explosivas

DE
EN
Dierential pressure gauge models 712.15.160, 732.15.160, optional for hazardous areas
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11265191.12 05/2021 EN/DE/FR/ES
ES
FR
© 04/2009 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA® is a registered trademark in various countries.
WIKA® ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Lire le mode d‘emploi avant de commencer toute opération !
A conserver pour une utilisation ultérieure !
¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!
¡Guardar el manual para una eventual consulta!
Operating instructions for models 712.15.160, 732.15.160,
optional for hazardous areas
Page 3- 28
Betriebsanleitung für Typen 712.15.160, 732.15.160,
optional für explosionsgefährdete Bereiche
Seite 29 - 54
Mode d‘emploi pour les types 712.15.160, 732.15.160,
en option pour zones explosives
Page 55 - 80
Manual de instrucciones para modelos 712.15.160,
732.15.160, opcional para zonas potencialmente explosivas
Página 81 - 106

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EN
Contents
Contents
Declarations of conformity can be found online at www.wika.com.
1. General information 4
2. Safety 5
2.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Responsibility of the operator . . . . . . . . . . . . . . . . . . . 6
2.5 Personnel qualification . . . . . . . . . . . . . . . . . . . . . 7
2.6 Labelling, safety marks . . . . . . . . . . . . . . . . . . . . . 7
2.7 Ex version. . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.8 Special conditions for safe use (X conditions). . . . . . . . . . . . . . 9
3. Transport, packaging and storage 9
3.1 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Packaging and storage . . . . . . . . . . . . . . . . . . . . . 9
4. Commissioning, operation 10
4.1 Mechanical mounting . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Differential pressure display. . . . . . . . . . . . . . . . . . . . 13
4.3 Replaceable plug-in scales (option) . . . . . . . . . . . . . . . . . 15
4.4 Valve manifold with working pressure indication (option) . . . . . . . . . . 15
4.5 Electrical connection . . . . . . . . . . . . . . . . . . . . . . 18
4.6 Integrated transmitter electronics (option) . . . . . . . . . . . . . . . 21
5. Faults 24
6. Maintenance and cleaning 24
6.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7. Dismounting, return and disposal 25
7.1 Dismounting . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8. Specications 27
8.1 Permissible temperature ranges . . . . . . . . . . . . . . . . . . 27
8.2 Differential pressure gauge . . . . . . . . . . . . . . . . . . . . 27
8.3 Integrated transmitter electronics (option) . . . . . . . . . . . . . . . 28
Annex 1: Pin assignment for magnetic snap-action contacts 107
Annex 2: EU declaration of conformity 111

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1. General information
■The instrument described in the operating instructions has been designed and manufac-
tured using state-of-the-art technology. All components are subject to stringent quality and
environmental criteria during production. Our management systems are certied to ISO
9001 and ISO 14001.
■These operating instructions contain important information on handling the instrument.
Working safely requires that all safety instructions and work instructions are observed.
■Observe the relevant local accident prevention regulations and general safety regulations
for the instrument's range of use.
■The operating instructions are part of the product and must be kept in the immediate vicini-
ty of the instrument and readily accessible to skilled personnel at any time.
■Skilled personnel must have carefully read and understood the operating instructions prior
to beginning any work.
■The manufacturer's liability is void in the case of any damage caused by using the product
contrary to its intended use, non-compliance with these operating instructions, assignment
of insuciently qualied skilled personnel or unauthorised modications to the instrument.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modications.
■Further information:
- Internet address: www.wika.de / www.wika.com
- EN 837-2 Selection and installation recommendations for pressure
measuring instruments
Model Ex version Description Data
sheet
712.15.160,
732.15.160
Option Dierential pressure gauge PM 07.30
891.44 No Integrated transmitter electronics (option) PM 07.30
892.44 Yes Integrated transmitter electronics (option) PM 07.30
828 No Magnetic snap-action contact (option) PM 07.30
212.20.100 No Pressure gauge for working pressure indication (option) PM 02.01
232.50.100 Option Pressure gauge for working pressure indication (option) PM 02.02
232.30.100 Option Pressure gauge for working pressure indication (option) PM 02.04
A-10 No Pressure sensor for working pressure (option) PE 81.60
IS-3 Yes Pressure sensor for working pressure (option) PE 81.58
Depending on the version, observe the additionally enclosed operating instructions!
1. General information

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2. Safety
2.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or
death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or
damage to property or the environment, if not avoided.
DANGER!
... identies hazards caused by electrical power. Should the safety instructions not
be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation in the hazardous area that results in
serious injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by hot
surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for ecient and trouble-
free operation.
2.2 Intended use
Mechanical dierential pressure measuring instruments are used for the display of levels on
closed vessels, particularly in cryotechnology. Depending on the version, integrated trans-
mitter electronics can be used to output an electrical output signal for control. An optionally
mounted valve manifold facilitates commissioning and maintenance of the instrument. Option-
ally, the working pressure can be measured additionally with a pressure gauge or a pressure
sensor.
The instrument oers many application possibilities, in particular for gaseous and liquid
gases, and also for media that are non-aggressive, not highly viscous and non-crystallising.
Only use the instrument in applications that lie within its technical performance limits (e.g.
temperature limits, material compatibility, ...).
→ For performance limits see chapter 8 “Specications”
2. Safety

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2. Safety
The instrument has been designed and built solely for the intended use described here, and
may only be used accordingly.
The manufacturer shall not be liable for claims of any type based on operation contrary to the
intended use.
2.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and injuries.
▶Refrain from unauthorised modications to the instrument.
▶Do not use the instrument with abrasive or viscous media.
Any use beyond or dierent to the intended use is considered as improper use.
2.4 Responsibility of the operator
The instrument is used in the industrial sector.The operator is therefore responsible for legal
obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the safety, accident
prevention and environmental protection regulations for the application area must be
maintained.
The operator is obliged to maintain the product label in a legible condition.
To ensure safe working on the instrument, the operating company must ensure
■that suitable rst-aid equipment is available and aid is provided whenever required.
■that the operating personnel are regularly instructed in all topics regarding work safety, rst
aid and environmental protection and know the operating instructions and in particular, the
safety instructions contained therein.
■that the instrument is suitable for the particular application in accordance with its intended
use.
■that personal protective equipment is available.
On the wetted parts of the instrument, small residual amounts of the adjust-
ment medium (e.g. compressed air, water, oil) can adhere from production.With
increased requirements for technical cleanliness, suitability for the application must
be checked by the operator before commissioning.

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2. Safety
2.5 Personnel qualification
WARNING!
Risk of injury should qualication be insucient!
Improper handling can result in considerable injury and damage to property.
The activities described in these operating instructions may only be carried out by
skilled personnel who have the qualications described below.
Skilled personnel
Skilled personnel are understood to be personnel who, based on their technical training,
knowledge of measurement and control technology and on their experience and knowledge
of country-specic regulations, current standards and directives, are capable of carrying out
the work described and independently recognising potential hazards.
2.6 Labelling, safety marks
Product label for dierential pressure gauge, non-Ex version (example)
Instrument type
Model
Scale range
Output signal (option)
Supply voltage (option)
Article number
Date of manufacture (month/year)
Product label for dierential pressure gauge, Ex version (example)
Model + transmitter electronics Ex marking
Article number Supply voltage
Serial number Output signal
Date of manufacture (month/year) Scale range
Before mounting and commissioning the instrument, ensure you read the
operating instructions!







  





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2. Safety
Risk of burns!
Potentially dangerous situation caused by hot surfaces.
The instrument bearing this mark is a safety pressure gauge with a solid bae wall
in accordance with EN 837, safety version “S3”.
Do not dispose of with household waste. Ensure a proper disposal in accordance
with national regulations.
2.7 Ex version
The Ex version of the models 712.15.160 and 732.15.160 consists exclusively of a mechani-
cal dierential pressure gauge with integrated transmitter electronics, model 892.44.
DANGER!
Danger to life due to loss of explosion protection
Non-observance of these instructions and their contents may result in the loss of
explosion protection.
▶Observe the safety instructions in this chapter and further explosion protection
instructions in these operating instructions.
▶Observe the information given in the applicable type examination certicate and
the relevant country-specic regulations for installation and use in hazardous
areas (e.g. IEC 60079-14, NEC, CEC).
Check whether the classication is suitable for the application. Observe the relevant national
regulations.
Ex marking
ATEX
IECEx
II 2G Ex ia IIC T4/T5/T6 Gb
Permissible temperature range
For determining the maximum temperature at the instrument, besides the medium temper-
ature also other inuences such as the ambient temperature and, if applicable, the solar
irradiation must be taken into account.
Required temperature class
(ignition temperature)
Permissible temperature range
at the instrument
T6 and T5 -40 ... +60 °C
T4 -40 ... +80 °C

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The installation should be made in such a way that the temperature range of the instrument,
also considering the eects of convection and thermal radiation, neither exceeds nor falls
below the permissible limits.
The permissible temperature ranges must not be exceeded at the instrument either. If neces-
sary, measures for cooling (e.g. syphon, instrumentation valve) have to be taken.
2.8 Special conditions for safe use (X conditions)
1. Safe use of the instrument requires observance of all data given in the chapters of these
operating instructions, in particular the data regarding the Ex version.
2. The Ex version of the instrument can be used in the following ambient temperature
range Ta:
-40 °C ≤ Ta ≤ +60 °C for temperature class T6 and T5
-40 °C ≤ Ta ≤ +80 °C for temperature class T4
3. The permissible medium temperature range Tmmust be observed on the instrument:
-40 °C ≤ Tm ≤ +60 °C for oxygen
-40 °C ≤ Tm ≤ +60 °C for temperature class T6 and T5
-40 °C ≤ Tm ≤ +80 °C for temperature class T4
3. Transport, packaging and storage
3.1 Transport
Check the instrument for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
CAUTION!
Damage through improper transport
With improper transport, a high level of damage to property can occur.
▶When unloading packed goods upon delivery as well as during internal trans-
port, proceed carefully and observe the symbols on the packaging.
▶With internal transport, observe the instructions in chapter 3.2 “Packaging and
storage”.
3.2 Packaging and storage
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change in
installation site, sending for repair).
Permissible conditions at the place of storage:
Storage temperature: -20 ... +60 °C
2. Safety / 3. Transport, packaging and storage

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Avoid exposure to the following factors:
■Direct sunlight or proximity to hot objects
■Mechanical vibration, mechanical shock (putting it down hard)
■Soot, vapour, dust and corrosive gases
■Hazardous environments, ammable atmospheres
Store the instrument in its original packaging in a location that fulls the conditions listed
above.
4. Commissioning, operation
Personnel: Skilled personnel
Before installation, commissioning and operation, ensure that the appropriate instrument has
been selected in terms of scale range, design and specic measuring conditions.
DANGER!
Danger to life from explosion!
Through working in ammable atmospheres, there is a risk of explosion which can
cause death.
▶Only carry out set-up work in non-hazardous environments!
WARNING!
Physical injuries and damage to property and the environment caused by
hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, ammable or toxic
substances), harmful media (e.g. corrosive, toxic, carcinogenic, radioactive), there is a
danger of physical injuries and damage to property and the environment.
Should a failure occur, aggressive media with extremely high temperature and
under high pressure may be present at the instrument.
▶For these media, in addition to all standard regulations, the appropriate existing
codes or regulations must also be followed.
▶Wear the requisite protective equipment.
WARNING!
Physical injuries and damage to property and the environment caused by
media escaping under high pressure
With the pressurisation of the instrument, as a result of poor sealing of the process
connection, media under high pressure can escape.
Due to the high energy of the media that can escape in the event of a failure, the
possibility of physical injuries and damage to property exists.
▶The sealing of the process connection must be carried out expertly and checked
for leak tightness.
3. Transport, packaging and storage / 4. Commissioning, operation

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Requirements for the installation point
If the line to the measuring instrument is not adequately stable, an instrument mounting brack-
et should be used for fastening.The instruments should be protected against coarse dirt and
wide uctuations in ambient temperature.
4.1 Mechanical mounting
The installation of the dierential pressure gauge is made following the installation recom-
mendations for pressure measuring instruments in accordance with EN 837-2 /7.
■Prior to the installation, clean the measuring lines thoroughly by tapping and blowing or
ushing.
■Mount and operate the instruments free from vibration
Fasten them using rigid measuring lines and/or 4 M8 mounting holes in the measuring
ange.
■Protect pressure gauges from contamination and high temperature changes.
■The maximum permissible medium/ambient temperature must not be exceeded.
■Mounting of the process connection according to axed symbols ⊕ and ⊖.
⊕ high pressure ⇒ bottom pressure (pB)
⊖ low pressure ⇒ working pressure/overlay pressure (pD)
pB= pFL + pD
(where pFL = hydrostatic pressure of the liquid = r • g • h)
4. Commissioning, operation

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pD
Condensate
pDpD
Levelling
vessel
hhh
Δp Δp Δp
pDpB
pDpB
Condensate
⊖
Wall mounting
Fasten to 4 M8 mounting holes or using 2 xing holes of Ø 8.5 mm
Mounting types for level measurement
Standard for cryo containers
(liqueed gases)
2 examples for containers with separate condensate
vessel
4. Commissioning, operation
⊖
⊖⊕ ⊕⊕
Filling connection
Extraction
connection
Filling connection Filling connection
Extraction
connection
Extraction
connection
11592649.01
Mounting
holes M8
Pressure
compensating
valve
P
rocess connections G 1/4
Fixing holes Ø 8.5
Shut-o valve ⊕
Shut-o
valve ⊖
Test con-
nection

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Panel mounting (option)
Measuring cell Adjustable scale ranges
from to
140 mbar 0 ... 40 mbar 0 ... 140 mbar
280 mbar 0 ... 80 mbar 0 ... 280 mbar
560 mbar 0 ... 160 mbar 0 ... 560 mbar
1,130 mbar 0 ... 320 mbar 0 ... 1,130 mbar
2,300 mbar 0 ... 650 mbar 0 ... 2,300 mbar
4,000 mbar 0 ... 1,150 mbar 0 ... 4,000 mbar
4.2 Differential pressure display
The measuring span of the dierential pressure gauge can, depending on the measuring
cell, be adjusted within the measuring range limits given in the table. Ideally, this adjustment
should be made on a test bench, though it can also be carried out at the measuring point
using a hand test pump.
Measuring range limits
4. Commissioning, operation
11248832.02
Panel cutout
Panel

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11224380.02BA
Mounting holes M8
Process connections G 1/4
Process connections G 1/4
Additional process connections
■Three additional G ¼ female threads on
the minus media chamber (right measur-
ing cell ange when viewing the instru-
ment from behind), e.g. for connecting a
pressure switch, safety valve or a model
A-10 or IS-3 pressure sensor
■Two G ¼ female threads on the plus
media chamber (left measuring cell
ange when viewing the instrument from
behind), e.g. for recalibration
Span adjustment
Span adjustment
Socket-head screwdriver
(included in delivery)
1. The span adjustment, situated at the 4 o‘clock point on the case circumference, is acces-
sible by removing the sealing cap.
2. Pressurise the instrument to the desired nominal pressure.
3. Insert a socket-head screwdriver (SW 3 mm) into the funnel guide, and adjust the pointer
to the end value by turning it clockwise (smaller measuring range) or anti-clockwise (larger
measuring range).The instrument will then be fully adjusted to the required measuring
range.
4. If the instrument is equipped with a model 89x.44 transmitter, then this procedure will also
adjust the output signal to the new measuring range.
5. After completing the adjustment the instrument should be re-sealed with the sealing cap.
4. Commissioning, operation
Turn clockwise: Smaller measuring range
Turn anticlockwise: Larger measuring range
Sealing cap for span
adjustment

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4.3 Replaceable plug-in scales (option)
1. Loosen the clamp clip on the case of
the dierential pressure gauge and
remove the cover ring complete with
the lens.
2. Loosen and remove the knurled screw.
3. Remove all three scales, place the
desired scale on top and put them back
in place.
4. Reinsert the knurled screw and tighten
it.
5. Mount the cover ring and lens and the
clamp clips again.
4.4 Valve manifold with working pressure indication (option)
Expansion with a compact valve manifold with pressure gauge connectable via a ange
allows, in addition to the level detection, the measurement of the working pressure at a central
measuring point.
Pressure gauge for working pressure indication (option)
Non-Ex version: Model 212.20.100
Ex version: Models 232.50.100, 232.30.100



Clamp clip
Cover ring
Knurled screw
Scales
11236396.01BA
Working pressure indication
with pressure gauge
Pressure compensating valve
⊕ shut-o valve
⊖ shut-o valve
Test connection
M20 x 1.5
4. Commissioning, operation

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Functions of valve manifold
■Shut-o of the process line without interrupting operations:
- For instrument mounting and testing
- For protecting the instrument from impermissible overpressure load of n-times rated
pressure of the plant
■Protection of the instrument against pressure surges and shocks and thus against unspec-
ied operating conditions
■Instrument shutdown, for example, if measurements are only sporadically required over
prolonged operating periods (to increase the service life of the instrument at high pressure
change frequency)
■Recalibration of the dierential pressure gauge (level indication)
1. Close shut-o valves for ⊕ and ⊖ side
2. Then open pressure compensating valve, wait for a short period and close the pressure
compensating valve again
3. The pressure standard and pressure generator are connected in the plus chamber of
the measuring system via an additional G ¼ female thread.
4. In the valve manifold, remove the test connection screw on the ⊖ side
5. The plus side can now be pressurised
After completed adjustment:
- Close test connection screw again
- Remove pressure standard and pressure generator again and seal connection
- Slowly open rst ⊕ shut-o valve, then ⊖ shut-o valve
■M20 x 1.5 test connection for checking the measuring instrument for the working pressure.
The pressure compensating valve allows a zero point check during operation (with the
valve open).
1. Close shut-o valves for ⊕ and ⊖ side
2. Then open the pressure compensating valve
■The medium will ow from the higher pressure side to the opposite side, the dierential
pressure on the instrument falling to zero (dierential pressure display must be at zero, i.e.
within the zero tolerance range, which shows that the instrument is working correctly).
■In case of deviation, the zero point can be set via the adjusta-
ble pointer installed as standard (prior to that, loosen bayonet
ring and remove window and sealing).The zero point setting is
achieved by turning the slotted screw on the adjustable pointer.
After completed zero point setting, re-t bayonet ring plus window
and sealing and close pressure compensating valve.
■For versions with integrated transmitter electronics, the electrical
zero point must be set.
3. Close pressure compensating valve again.
4. Slowly open rst ⊕ shut-o valve, then ⊖ shut-o valve.
Slotted
screw
4. Commissioning, operation

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Adapter for process connection (option)
The adapters can be ange mounted either directly to the dierential pressure gauge or to the
valve manifold.
4 dierent process connections are available:
■2 x G ½, female, centre distance 31 mm or 54 mm
■2 x ¼NPT, female, centre distance 31 mm or 54 mm
With a single order, all parts necessary for the tting to the dierential pressure gauge or to
the valve manifold are included in the delivery:
■2 x hexagon screws M8 x 16
■2 x hexagon screws M8 x 28
■2 x nut M8
■2 x O-ring sealing
4. Commissioning, operation

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4.5 Electrical connection
The electrical connection must only be made by qualied skilled personnel. The instrument
must be connected to the equipotential bonding of the plant.
Pressure sensor for working pressure (option)
Non-Ex version: Model A-10
Ex version: Model IS-3
Specications A-10 IS-3
Data sheet PE 81.60 PE 81.58
For Ex area No Yes, intrinsically safe
Measuring ranges 0 ... 2.5 bar to 0 ... 60 bar 0 ... 2.5 bar to 0 ... 60 bar
Outputs 4 ... 20 mA 4 ... 20 mA (repeater power supply
required)
Medium temperature -30 ... +100 °C -20 ... +60 °C
Ambient temperature -30 ... +80 °C -20 ... +60 °C
Wetted parts Stainless steel Stainless steel
Supply voltage UBDC 10 V < UB ≤ 30 V DC 10 V < UB ≤ 30 V
Permissible max. load RARA ≤ (UB- 8 V) / 0.02 A RA ≤ (UB- 10 V) / 0.02 A
Accuracy, best t straight
line, BFSL
≤ 0.5 % of span ≤ 0.2 % of span
Compensated temperature
range
0 ... +80 °C 0 ... +60 °C
Designation of connection
terminals, 2-wire Non-hazardous area Hazardous area
Please observe the separately enclosed operating instructions for each pressure sensor!
Pressure sensor for
working pressure
The pressure sensors for the working pressure
are screwed in sideways, on the left side of the
⊖ media chamber and can, if necessary, be
retrotted on site.
Pressure connection of the pressure sensor:
G ¼ male
4. Commissioning, operation

Dierential pressure gauge models 712.15.160, 732.15.160, optional for hazardous areas
11265191.12 05/2021 EN/DE/FR/ES
19
EN
Contact arm with
leaf spring
Rotation pin of coupling fork
Coupling fork
Connector screw
Coupler connector
with cable
Connector sealing
Connector lower part
Product label screws
Product label
Front panel
Connection
Transparent hood
Special foot with dovetail
guide
spiral tube
Ruby bearings
Bayonet rim
Adjustment key
Adjustment lock
Lock latch
Adjustment pin
Carrying arm
Contact pin
Magnet carrying
plate
Screw-in magnet
Red set pointer
The set value pointer of the
installed switch contacts are
adjusted, from the outside, to
the value at which the switch-
ing operation is to take place,
using the adjustment lock with
a separate or integral key.
The switch contacts are
designed to allow the instru-
ment pointer to move beyond
the adjusted actual value
pointer after contact actuation
takes place, with the contact
remaining actuated.
This design guarantees a
stable switching status corre-
sponding to the position of the
actual value pointer in case of
power failure.
Magnetic snap-action contacts (option)
Electrical switch contacts for level indicators and/or working pressure open circuits as a
function of the pointer position of the indicating measuring instruments.
Version
Single and double magnetic snap-action contact, model 828
The modular switch contact is an add-on unit, which can be built onto the pressure gauge
within a few minutes.The switch contacts provide IP65 ingress protection.The connection to
the actual value pointer is made by means of a special yoke so that a carrier pin at the pointer
itself is not needed. Due to this simple mounting, the instrument can be converted into a
contact pressure gauge extremely quickly and at low cost.
The switch contacts mainly comprise:
■the already wired switch contact equipped with a special foot and a fork coupling
■a transparent hood (polycarbonate) with dovetail guide into which the switch contact
containing the special foot is slid and fastened by means of a cross-head screw
■a connector lower part (4-pin) moulded or welded to the transparent hood
■an adjustment lock mounted in the centre of the transparent hood
4. Commissioning, operation

20
11265191.12 05/2021 EN/DE/FR/ES
Dierential pressure gauge models 712.15.160, 732.15.160, optional for hazardous areas
EN
Mounting of the switch contacts
Legend
Add-on unit with switch contact for level indication
Cable with coupler connector
4. Commissioning, operation
Cable with coupler connector
Sealing
1 Black
2 Blue
3 Brown
Green/Yelllow
Pin assignment
See Annex „Pin assignment for magnetic snap-action contacts“.
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