WIKA 712.15.160 User manual

Operating instructions
Betriebsanleitung
Mode d'emploi
Manuale d'uso
GB
Dierential pressure gauge
Models 712.15.160, 732.15.160
Dierenzdruckmessgerät
Typen 712.15.160, 732.15.160
Manomètre pour pression diérentielle
Types 712.15.160, 732.15.160
Manometro dierenziale
Modelli 712.15.160, 732.15.160
Model 712.15.160 with optional transmitters for dierential
pressure and working pressure
D
F
I
Cryo Gauge

GB
D
F
I
WIKA operating instructions dierential pressure gauge models 712.15.160, 732.15.160
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Operating instructions for dierential pressure gauges
Models 712.15.160, 732.15.160 Page 3-19
Betriebsanleitung für Dierenzdruckmessgeräte
Typen 712.15.160, 732.15.160 Seite 21-37
Mode d’emploi pour manomètres pour pression diérentielle
Types 712.15.160, 732.15.160 Page 39-52
Manuale d‘uso per manometri dierenziali
Modelli 712.15.160, 732.15.160 Pagine 53-66
© 2010 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 !
Prima di iniziare ad utilizzare lo strumento, leggere il manuale d‘uso!
Conservare per future consultazioni!

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1. Safety 4
2. General information 4
3. Installation 4
4. Dierential pressure gauge 6
5. Valve manifold with working pressure gauge (optional) 8
6. Application note 9
7. Adapter for process connection (optional) 9
8. Transmitter for level measurement (optional) 9
9. Transmitter for working pressure indication (optional) 13
10. Switch contacts (optional) 14
11. Maintenance 16
12. Disposal 16
Enclosure 1: EC-type examination certicate (Ex approval)
for turning angle transmitter type 892.44 17
Contents
Contents
Warning!
This symbol warns you against actions that can cause
injury to people or damage to the instrument.
Information
This symbol provides you with information, notes and
tips.

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1. Safety ... 3. Installation
2. General information
These operating instructions are based upon the following:
EN 837-2: Selection and installation recommendations for pressure gauges
Data sheet PM 07.30: Dierential pressure gauges models 712.15.160, 732.15.160
Data sheet PM 02.01, PM 02.02, PM 02.04: Bourdon tube pressure gauges
3. Installation
The installation of the dierential pressure gauge should be carried out in accordance with the
installation recommendations for pressure gauges per EN 837-2 /7.
Prior to the installation of the pressure gauge, the pipes should be thoroughly cleaned
The pressure gauge should be installed and operated such as to avoid exposure to
vibration.
Mounting by means of - rigid tailpipe and/or
- 4 M8 threaded mounting holes incorporated in the body
The pressure gauges should be protected against contamination and high temperature
uctuations
The maximum permissible media/ambient temperature must not be exceeded
Fitting of the pressure connections as per the jand isymbols
j higher pressure ⇒ bottom pressure (pB),
i lower pressure ⇒ working pressure/overriding pressure (pD)
pB= pFL + pD
(with pFL = hydrostatic pressure of liquid = ρ •g •h)
1. Safety
WARNING!
Before installation, commissioning and operation, ensure that the
appropriate dierential pressure gauge has been selected in terms of
measuring range, design and specic measuring conditions.
Only work on the gauge with the voltage disconnected.
Non-observance can result in serious injury and/or damage to equipment.
Only appropriately qualied skilled personnel should work on these
instruments.

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Types of installation for level measurement
Standard in cryogenic equipment 2 examples with condensate formation
(liquid gases)
3. Installation
Filling
hole
Filling
hole
Filling hole
pD
Condensate
⇔
pDpD
Constant
level
vessel
hhh
Δp Δp Δp
pDpB
pDpB
Drain pipe Drain pipe
Condensate
Drain pipe
ij
iji j
Wall mounting
Installation/fastening to the 4 mounting holes M8 / 2 xing holes Ø 8.5
Pressure connections G 1/4
M8
mounting holes
Pressure
equalising valve
Pressure connec-
tions G 1/4
Ø 8.5 xing holes
Isolating valve
j
Isolating
valve
i
Test
connection

3. Installation / 4. Dierential pressure gauge
11248832.02
6
Measuring cell Adjustable measuring 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
1130 mbar 0 ... 320 mbar - 0 ... 1130 mbar
2300 mbar 0 ... 650 mbar - 0 ... 2300 mbar
4000 mbar 0 ... 1150 mbar - 0 ... 4000 mbar
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4. Dierential pressure gauge
The measuring range of the dierential pressure gauge can, depending on the particular
measurement system used, be adjusted within the limits given in the previous specications
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
Turn clockwise: reduce measuring range
Turn anticlockwise: expand measuring range
Panel cut-out
Panel
Adjustable measuring span
Adjustable measuring span
Allen key
(included in delivery)
Option
Panel mounting
Cover cap for adjustable
measuring span

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1. The span adjustment, situated at the ‚4 o‘clock‘ point on the instrument case, is accessible
through the case by removing the cover cap.
2. Charge the instrument to the desired nominal pressure.
3. To set the pointer to the span value, using an allen key (size 3 mm) inserted into the funnel,
turn it either clockwise (reduce the measuring range) or anticlockwise (expand the measu-
ring range).The gauge will then be fully adjusted to the required measuring range.
4. If the gauge is equipped with a transmitter Model 89x.44, then this procedure will also
adjust the output signal to the new measuring range.
5. After completing the adjustment the equipment should be resealed with the cover cap.
Interchangeable scales (optional)
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.
Mount the cover ring and lens and fasten
the clamp clips again.
Additional pressure connections
Three additional G ¼ female threads are
available on the minus measurement chamber
(the right measuring cell ange when viewed
from the back) e.g. for connecting a pressure
switch, safety valve or A-10 Cryo or IS-20
transmitters
Two G ¼ female threads are available on
the plus measurement chamber (the left cell
ange when viewed from the back) e.g. for
recalibration
4. Dierential pressure gauge
Legend
Clamp clip
Cover ring
Knurled screw
Scales
G 1/4 pressure connections
Mounting holes M8
G 1/4 pressure connections

5. Valve manifold with working pressure gauge (optional)
Working
pressure gauge
NS 100
Slotted
screw
Pressure equalising
valve
Isolating valve
j
Isolating valve
i
Test connection
M20 x 1.5
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5. Valve manifold with working pressure gauge (optional)
The compact optional anged valve manifold for an NG 100 working pressure gauge allows
the central measurement of level and working pressure in a single device.
To isolate line pressures without inter-
rupting the process, enabling gauge
removal/examination and protecting the
gauge against overpressure of n-times
rated pressure which may occur during
plant pressure testing.
To protect the gauge against pressure
surges/pressure spikes, and thus against
unspecied operating conditions
For gauge shut-downs, if no measure-
ments are required for long operating
periods, i.e. if only occasional measure-
ments are necessary (to increase service
life of those dierential and working pressu-
re gauges with a high frequency of pressure
uctuations).
Recalibration of dierential pressure
gauges (tank volume display)
a) Close the plus and minus shut-o valve
b) Afterwards open the pressure equalising
valve, wait for a short period of time and then
close the pressure equalising valve again.
c) Connect the pressure standard and test pump using the additional G ¼ female port in the
plus chamber of the measuring system
d) Remove the test connection screw from the minus side valve manifold
e) The plus side can then be pressurised
f) After adjustment:
- Close the air bleed screw
- Disconnect the pressure standard and test pump and close the connection
- Slowly open rst the plus and then the minus shut-o valve
Test connection M20 x 1.5 for checking the working pressure gauge
The pressure equalising valve allows a zero point control during operation (with open valve).
a) Close the plus and minus shut-o valve
b) Afterwards open the pressure equalising valve
While the media is owing from the higher pressure side to the other side, the dierential
pressure at the pressure gauge drops to zero (the dierential pressure display must be at
zero, i.e. within the zero tolerance range which shows that the gauge is working correctly).
A zero adjustment can be made using the standard integra-
ted, adjustable pointer (remove snap t bezel incl. window and
sealing ring beforehand).Twisting the slotted screw on the
adjustable pointer you can adjust the zero point.
After completing the zero adjustment, the snap t bezel,
incl. window and ‚o‘-ring seal, must be correctly re-tted
and the pressure equalising valve must then be closed again.
Subsequently the zero point of versions with integrated
transmitter (see page 9) should be checked.
c) Close the pressure equalising valve
d) Slowly open rst the plus and then the minus shut-o valve

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6. Application note ... 8. Transmitter for level measurement
BCD switch (scale selection switch) and
zero point button (cover cap removed)
6. Application note
For dangerous media such as, for example, oxygen, acetylene,
combustible or acidic media, as well as for pressure vessels,
the general directives, and also the prevailing directives/guidelines
must also be adhered to.
7. Adapter for process connection (optional)
The adapters can be ange-connected either directly to
the dierential pressure gauge or to the valve manifold.
4 dierent process connections are available:
2 x G 1/4, female, connection distance 31 mm or 54 mm
2 x 1/4 NPT, female, connection distance 31 mm or 54 mm
With a single order, all parts necessary for tting to the dierential pressure gauge or to the
valve manifold are included in the scope of supply:
2 x hexagon screw M8 x 16, 2 x hexagon screw M8 x 28, 2 x nut M8 and 2 x O-Ring seal
8. Transmitter for level measurement (optional)
Standard version model 891.44
Ex version model 892.44
WIKA dierential pressure gauges with an integrated Model 89x.44 transmitter combines all
the advantages of an on-site mechanical display with the demands modern industry makes
for electrical signal transmission for the acquisition of measured values.
The transmitter is integrated into the housing of the level display. The measurement span
(electrical output signal) is set automatically by the mechanical display, i.e. the scale over a
swept angle of 270 degrees corresponds to 4 …20 mA (see section 4. Dierential pressure
gauge).
With multiple scales or interchangeable
dials (optional) the output signal of
4 ... 20 mA corresponding to each,
can be stored in a microprocessor.
The output signal can be changed over
to the desired uid type by rotating the
optional BCD switch (accessible through
a cover cap on the left side of the case)
using a screwdriver.
Electrical zero point (with option BCD switch)
If a zero point compensation is required (e.g. after mechanical zero point correction), the
instrument must rst be de-energised (pull the plug). Afterwards re-establish the power supply
(insert the plug) and press the zero point button for approx. 1 sec. within 30 sec.

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8. Transmitter for level measurement
WIKA operating instructions dierential pressure gauge models 712.15.160, 732.15.160
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Electrical zero point (without option BCD switch)
If the mechanical zero point is changed by means of the
adjustable pointer, the electrical zero point must be reset to
the mechanical zero point.
First depressurise the pressure gauge.
Loosen the complete cable hood on the right-hand side of
the pressure gauge by completely unscrewing the screw 
on the top of the cable hood cover using an appropriate
screwdriver (0.6 x 3.5 mm).
Extract the screw. Remove the cable hood with the
socket insert from the cable socket base and thus
separate the pressure gauge from the power supply.
Remove the cable hood cover from the cable hood 
and push the socket insert out downwards through the
entire cable hood .
Use a short stranded wire with bare points at both ends
(max. permissible resistance 30 Ω) to bridge contacts 5 and
6 on the socket insert.
Reassemble the plug in reverse order. Place the plug, with
the attached piece of stranded wire, onto the pin insert ,
and thus reestablish the power supply.
Within a max. 30 seconds the new zero point will be stored
within the electronics. During this period, the current in the
loop will increase to 9.5 mA.
The new zero point also remains stored in the case of a
power failure.
Loosen the plug again in the same sequence as descri-
bed above and remove the piece of stranded wire. After
reassembling the plug, the electrical output signal will once
more correspond to the indication of the mechanical pointer.
Ensure the seals are properly and
securely reinstalled to maintain the
protection class.
Screw
Cable hood cover
Cable hood
Socket insert
Cable socket base
Seals

Specications Models 891.44 and 892.44 (Ex Version)
Power supply UB
for Non-Ex version DC 12 V < UB ≤ 30 V
for Ex version see the section ‚Ex protection‘!
Permissible residual ripple % of span/10 V ≤ 0.1
Supply voltage eect % ss ≤ 10
Output signal 4 … 20 mA, 2-wire system
Permissible max. load RAfor Non-Ex versions, Model 891.44:
RA ≤ (UB- 12 V) / 0.02 A with RA in Ω and UBin Volt
for Ex versions, Model 892.44:
RA ≤ (UB- 14 V) / 0.02 A with RA in Ω and UBin Volt
Eect of load % of span ≤ 0.1
Output signal adjustment
Zero point, electrical Adjustment of zero point through brief bridging of terminals 5 and 6,
or using the „scale selection switch“ option, selectable via button 1)
Scale selection 4 scales selectable via BCD switch
Linearity % of span ≤ 1.0 (limit point calibration)
Permissible
ambient temperatures °C -40 … +80, -40 … +60 with oxygen
Compensated temp. range °C -40 … +80
Temperature coecients in
compensated temp. range
Mean TK of zero % of span/10 K ≤ 0.3
Mean TK of span % of span/10 K ≤ 0.3
Ex protection according to EC-Type Examination Certicate
BSV 08 ATEX E 018 X for Model 892.44
Ex certication EEx II 2G EEx ia IIC T6
Conformity specications
Power supply UiDC 14 … 30 V
Short circuit rating IimA max. 100
Rating PiW max. 1
Internal capacitance CinF 12
Internal inductance LimH negligible
Medium temperature °C -40 … +80, -40 … +60 with oxygen
Ambient temperature °C -40 … +60 (T6)
CE-Conformity interference emission and immunity per EN 61326
Wiring L-connector (screw terminals up to 2.5 mm²)
Wiring protection protected against reverse polarity and overvoltage
Ingress protection IP 65 per EN 60529 / IEC 529
Wiring details,
2-wire
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Earth, connected
to case 2)
UB+/Sig+
Terminals 3, 4, 5 and 6: only for internal
application
0V/Sig-
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8. Transmitter for level measurement
1) Only possible within 30 seconds of connecting the supply voltage
2) This connection must not be used
for equipotential bonding.The
instrument must be incorporated in
the equipotential bonding via the
process connection.

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Defect Possible reason Remedy
No signal output Failure of power supply Check power supply and wiring
Wiring interrupted (or broken) replace defective components
Transmitter incorrectly wired Check wiring;
if necessary rectify it
No pressure Check tailpipes
Open press. compensation valve Close pressure compensation valve
Electronic defect e.g. through Return pressure gauge to
incorrect supply voltage manufacturer for repair
or stray voltage spikes
Steady signal Pressure entry blocked Check tailpipes and pressure entry
despite pressure bore, if necessary clean it carefully
variation Open press. compensation valve Close pressure compensation valve
Electronic defect e.g. through Return pressure gauge to
incorrect supply voltage manufacturer for repair
or stray voltage spikes
Transmitter defect after being Return pressure gauge to
over-pressured manufacturer for repair
Steady and too high Electronic defect through Return pressure gauge to
signal despite of incorrect supply voltage manufacturer for repair
pressure variation or stray voltage spikes
Full span reading too low Supply voltage too low Adjust supply voltage
Load impedance too high Consider permissible max. load
Wrong scale selected Check position of scale selection
switch
Zero signal too low Wrong zero compensation Readjust zero point
Zero signal too high Wrong zero compensation Readjust zero point
Transmitter over-pressured Return pressure gauge to
manufacturer for repair
8. Transmitter for level measurement
Trouble shooting

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Specications A-10 IS-20
Data sheet PE 81.60 PE 81.50
Design standard intrinsically safe
Pressure ranges bar 0 ... 2.5 to 0 ... 60 0 ... 2.5 to 0 ... 60
Outputs mA 4 ... 20 4 ... 20 (line transformer)
Medium temperature °C -30 ... +100 -20 ... +80
Ambient temperature °C -30 ... +100 -20 ... +80
Wetted parts stainless steel stainless steel
Power supply UBDC 8 V < UB ≤ 30 V 10 V < UB ≤ 30 V
Maximum load RAOhm RA ≤ (UB- 8 V) / 0.02 A RA ≤ (UB- 10 V) / 0.02 A
Accuracy
BFSL % of span ≤ 0.5 ≤ 0.25
Compensated temperature
range
°C 0 ... +80 °C 0 ... +80 °C
Wiring details,
2-wire
The corresponding operating instructions are included in the delivery
of each dierential pressure gauge with integrated transmitter for
working pressure indication.
Non hazardous
area Hazardous (classied) area
9. Transmitter for working pressure indication
9. Transmitter for working pressure indication (optional)
Standard version model A-10
or Ex version model IS-20
Transmitter for working
pressure indication
The transmitters for the working pressure
are screwed in sideways, on the left side of
the minus measurement chamber and can,
if necessary, be retrotted on-site.
Pressure connection for Transmitter: G 1/4
(male)

14
Spanner
Adjustable lock
Metal ag
Adjustable pin
Carrying arm
Contact pin
Magnet carrying
plate
Screw-in magnet
Desired value
indicator, red
Contact arm with
plate spring
Carrying pin of coupling fork
Coupling fork
Plug screw
Plug with cable
Plug seal
Plug socket
Type plate screws
Type plate
Front plate
Connection
Transparent hood
Special foot
with dovetail lead
Spiral spring
Ruby bearing
Bayonet rim
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10. Switch contacts
10. Switch contacts (optional)
These switch contacts are tted into the case of a pressure gauge and intended to make or
break an electric control circuit triggered by the position of the instrument‘s pointer.
Versions
Single and double magnetic snap-action contacts or single and double inductive alarm
sensors. Please refer to data sheet AC 08.01 for technical data.
The modular switch contact is a self-contained unit, which can be built onto the pressure
gauge within a few minutes.
The switch contacts provide IP65 ingress protection even for oil-lled gauges. The connec-
tion to the instrument pointer is made by means of a special fork so that a carrying pin at
the pointer itself is not necessary. By means of this simple mounting, the instrument can be
converted into a contact measuring instrument quickly and inexpensively.
The switch contacts mainly comprise:
the pre-wired switch contact, which is provided with a special foot and a fork coupling
a transparent hood (polycarbonate) with dovetail lead into which the alarm contact is
pushed and which is fastened by means of a recessed head screw
a 4-pin plug socket, injection-moulded or welded to the transparent cover
an adjustable lock, mounted in the middle of the transparent cover.
The set pointers of the built-in
switch contact are adjusted, to
the value at which the contact
should switch, from the outside
via the adjustable lock using a
separate or a rigidly mounted
key.
The switch contacts are
designed to allow the instru-
ment pointer to move beyond
the adjusted set pointer after
contact actuation takes place,
with the contact remaining
actuated.
The design therefore guaran-
tees a stable switching condi-
tion, which corresponds to
the position of the instrument
pointer, even if the power fails.

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10. Switch contacts
Mounting of switch contacts
First the snap t style bezel with sealing ring, and the gauge window, must be removed. Prior
to attaching the transparent hood to the measuring instrument, the contacts must be adjusted
in accordance with their operating range.
Using the magnetic snap-action contact, the magnetic retention force must be adapted to the
instrument-specic conditions by adjusting (twisting) the screw-in magnet. The magnet must
then be protected against unintentional adjustment by using an appropriate locking varnish.
The small plate spring at the exible contact arm must be angled accordingly.
The fully-adjusted unit must now be tted to the gauge, together with the snap-t bezel, and
aligned to the extent that the fork coupling guiding the exible contact arms grips over the
gauge pointer without touching the dial. Should this occur, the carrying fork must be shorte-
ned using a suitable cutting tool.
The contacts are best adjusted when they are factory-tted.
By snapping the bezel onto the case, the whole contact unit will be xed to the pressure
gauge.
Connector plug
As counterpart to the connector base welded
onto the transparent hood
Material: PA 6 - GF 30
Colour: grey
Connection: stripped and tinned wires
Ingress protection: IP 65 per EN 60529 / IEC 529
For magnetic snap-action contacts:
Connector plug 3 poles + l (250 V max.)
with 2 m cable 4 x 1.0 mm2
For inductive alarm sensors:
Low voltage execution without protective earth conductor
Connector plug 4 poles (50 V max.)
with 2 m cable 4 x 0.75 mm2
Extent of delivery: 1 plug with cable,
1 central screw M3 x 20 and 1 gasket
Legend
Self-contained unit with switch contact for level measurement
Self-contained unit with switch contact for working pressure
Connector plug
Gasket

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10. Switch contacts ... 12. Disposal
11. Maintenance
WIKA dierential pressure gauges require no maintenance or servicing and will give very long
service when handled and operated properly.
12. Disposal
Incorrect disposal can put the environment at risk.
Dispose of instrument components and packaging materials in an environmentally compatible
way and in accordance with the country-specic waste disposal regulations.
Terminal conguration
Magnetic snap-action
contacts:
Single contact,
NS 100
Double contact,
NS 100
Single contact,
NS 160
Double contact,
NS 160
Inductive alarm sensors:
Single contact,
NS 100 and 160
Double contact,
NS 100 and 160
green/yellow
blue
blue
brown
brown
brown
black
black
1st contact
common
1st contact
common
2nd contact
common
2nd contact
yellow
white
black
1st contact +
white
yellow
violet
1st contact -
1st contact +
1st contact -
2nd contact -
2nd contact +
green/yellow
green/yellow green/yellow
green/yellow green/yellow
blue
brown
black
1st contact
common
2nd contact
green/yellow green/yellow

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Enclosure 1

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Enclosure 1

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Enclosure 1

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