WIKA PS-900 User manual

Operating instructions
EN
WIKA Instruments India Pvt. Ltd.
128 SIDCO North Phase
Ambattur Industrial Estate, Chennai 600 098
Tel. [phone] / 2018 / 9840919318
[email protected]
www.wika.co.in
© 2022 WIKA Alexander Wiegand SE & Co. KG
All rights reserved.
Prior to starting any work, read the operating instructions!
Keep for later use!
Contents
1. General information
2. Design and function
3. Safety
4. Transport, packaging and storage
5. Commissioning, operation
6. Faults
7. Maintenance and cleaning
8. Dismounting, return and disposal
9. Specifications
1. General information
■The mechanical pressure switch described in the operating instructions has been
designed and manufactured using state-of-the-art technology. All components
are subject to stringent quality and environmental criteria during production. Our
management systems are certified to ISO 9001.
■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
vicinity of the pressure measuring instrument and readily accessible to skilled person-
nel 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 insufficiently qualified skilled personnel or unauthorised modifications to
the instrument.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modifications.
■Further information:
- Internet address: www.wika.co.in
- Relevant data sheet: PV 35.58 . 01/2022
Abbreviations, definitions
DPDT
SPDT
Double pole double throw
Single pole double throw
NC Normally closed contact type (NC = normally closed)
NO Normally open contact type (NO = normally open)
COM Common contact
GND Ground connection
Pressure switch, high adjustability of switch differential
For process industry
Model PS-900
85504595.01 12/2022 EN
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

3. Safety
3.1 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!
... identifies 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 that can result in burns, caused by
hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient and
trouble-free operation.
3.2 Intended use
Depending on the version, the model PS-900 mechanical pressure switch is fitted with
an SPDT or DPDT switch contact and is used in industrial control, monitoring and alarm
applications.The switch point can be specified by the customer on site. Depending on
the version, the instrument can switch electrical loads of up to AC 250 V, 15 A.
The PS-900 pressure switch offers many application possibilities for gaseous and
liquid aggressive media that are not highly viscous or crystallising.
WARNING!
Use in the wrong application can lead to considerable personal injury and
damage to equipment.
▶Only use the instrument in applications that lie within its technical performance
limits (e.g. max. pressure, current rating, ambient temperature, material
compatibility, ...)For performance limits see chapter 9 “Specifications”.
▶This instrument is not permitted to be used in hazardous areas!
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.
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and injuries.
▶Refrain from unauthorised modifications to the instrument.
▶Do not use the instrument within hazardous areas.
▶Do not use the instrument with abrasive or highly viscous media
Any use beyond or different to the intended use is considered as improper use.
1. General information
■The mechanical pressure switch described in the operating instructions has been
designed and manufactured using state-of-the-art technology. All components
are subject to stringent quality and environmental criteria during production. Our
management systems are certified to ISO 9001.
■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
vicinity of the pressure measuring instrument and readily accessible to skilled person-
nel 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 insufficiently qualified skilled personnel or unauthorised modifications to
the instrument.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modifications.
■Further information:
- Internet address: www.wika.co.in
- Relevant data sheet: PV 35.58 . 01/2022
Abbreviations, definitions
DPDT
SPDT
Double pole double throw
Single pole double throw
NC Normally closed contact type (NC = normally closed)
NO Normally open contact type (NO = normally open)
COM Common contact
GND Ground connection
2. Design and function
2.1 Overview
Process connection
Cover
Range scale
Lock plate
Range screw
Cable entry
Cable entry
Blow-out disc
Deadband
2.2 Description
The pressure element of the model PS-900 is a resilient bellow from stainless steel which
works against a spring mechanism with an adjustable pre-load force. On the spring
mechanism there is a contact arm for actuating the SPDT switch contact.The switch is
actuated as soon as the force generated by the pressure in the pressure element is great-
er than the set pre-load force.
2.3 Terms used
Maximum operating pressure
The maximum static pressure with which the instrument can be used without changing the
assured performance data.
Reset point
The pressure value at which the switch returns to the starting position. Mathematically,
the pressure value for the reset point is equal to the pressure value of the switch point
minus the switch differential on rising pressure. On falling pressure, the pressure value
for the reset point is equal to the pressure value of the switch point plus the switch
differential.
Switch differential
The switch differential is the difference between the switch point and the reset point.
This is also known as the switch hysteresis.
2.4 Scope of delivery
■Pressure switch
■Operating instructions
Cross-check scope of delivery with delivery note.
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

3. Safety
3.1 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!
... identifies 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 that can result in burns, caused by
hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient and
trouble-free operation.
3.2 Intended use
Depending on the version, the model PS-900 mechanical pressure switch is fitted with
an SPDT or DPDT switch contact and is used in industrial control, monitoring and alarm
applications.The switch point can be specified by the customer on site. Depending on
the version, the instrument can switch electrical loads of up to AC 250 V, 15 A.
The PS-900 pressure switch offers many application possibilities for gaseous and
liquid aggressive media that are not highly viscous or crystallising.
WARNING!
Use in the wrong application can lead to considerable personal injury and
damage to equipment.
▶Only use the instrument in applications that lie within its technical performance
limits (e.g. max. pressure, current rating, ambient temperature, material
compatibility, ...)For performance limits see chapter 9 “Specifications”.
▶This instrument is not permitted to be used in hazardous areas!
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.
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and injuries.
▶Refrain from unauthorised modifications to the instrument.
▶Do not use the instrument within hazardous areas.
▶Do not use the instrument with abrasive or highly viscous media
Any use beyond or different to the intended use is considered as improper use.
3.4 Personnel qualification
WARNING!
Risk of injury should qualification be insufficient!
Improper handling can result in considerable injury and damage to equipment.
▶The activities described in these operating instructions may only be carried
out by skilled personnel who have the qualifications described below.
Skilled electrical personnel
Skilled electrical personnel are understood to be personnel who, based on their technical
training, know-how and experience as well as their knowledge of country-specific
regulations, current standards and directives, are capable of carrying out work on
electrical systems and independently recognising and avoiding potential hazards. The
skilled electrical personnel have been specifically trained for the work environment they
are working in and know the relevant standards and regulations. The skilled electrical
personnel must comply with current legal accident prevention regulations.
3.5 Labelling, safety marks
Product label (example)
4. Transport, packaging and storage
4.1 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
transport, proceed carefully and observe the symbols on the packaging.
▶With internal transport, observe the instructions in chapter 4.2 “Packaging
and storage”.
If the instrument is transported from a cold into a warm environment, the formation of
condensation may result in instrument malfunction. Before putting it back into operation,
wait for the instrument temperature and the room temperature to equalise.
4.2 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: -10 ... +60°C (14 ... +140°F)
■Humidity: 35 ... 85 % relative humidity (no condensation)
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, flammable atmospheres
Store the instrument in its original packaging in a location that fulfils the conditions listed
above.
5. Commissioning, operation
Before installation, commissioning and operation, ensure that the appropriate instrument
has been selected in terms of design and specific measuring conditions.
Tools: Star screw driver, socket wrench 6.5 mm, open-ended spanner 20 mm,
allen key 6 mm.
Before mounting and commissioning the instrument, ensure you read the
operating instructions!
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

4. Transport, packaging and storage
4.1 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
transport, proceed carefully and observe the symbols on the packaging.
▶With internal transport, observe the instructions in chapter 4.2 “Packaging
and storage”.
If the instrument is transported from a cold into a warm environment, the formation of
condensation may result in instrument malfunction. Before putting it back into operation,
wait for the instrument temperature and the room temperature to equalise.
4.2 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: -10 ... +60°C (14 ... +140°F)
■Humidity: 35 ... 85 % relative humidity (no condensation)
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, flammable atmospheres
Store the instrument in its original packaging in a location that fulfils the conditions listed
above.
5. Commissioning, operation
Before installation, commissioning and operation, ensure that the appropriate instrument
has been selected in terms of design and specific measuring conditions.
Tools: Star screw driver, socket wrench 6.5 mm, open-ended spanner 20 mm,
allen key 6 mm.
5.1 Requirements at the measuring point
■The process pressure must never exceed the specified maximum operating pressure.
■The ambient and medium temperatures must never be outside the permissible
operating conditions (see chapter 9 “Specifications”). The temperature at the
instrument case must not exceed the value of 60°C. The limit values at the instrument
must be fulfilled by taking appropriate measures, e.g. by mounting with a distance from
large hot surfaces or vessels; if required, by extending the connection with a pipeline or
by providing it with thermal insulation.
■Protected from weather influences.
■Any vibrations or shocks which occur must not exceed accelerations of
1 g (9.81 m/s2) within a frequency range of 10 ... 150 Hz.
■The measuring line and the process connection must be designed such that no
mechanical loads can occur on the instrument in the entire permissible ambient and
medium temperature ranges.
■Sealing faces are clean and undamaged.
■Maintain clearance for blow-out device of > 20 mm.
■Sufficient space for a safe electrical installation.
→ For performance limits see chapter 9 “Specifications”
5.2 Mechanical mounting
■After unpacking the instrument, a visual inspection for damage must be carried out.
■Mounting is only permitted in the depressurised state. Reliably depressurise the
instrument using the available valves and protective devices.
■Use seals suitable for the process connection provided.
■When screwing the instruments in, the force required for sealing must not be applied
through the case, but only through the spanner flats provided for this purpose on the
process connection, and using a suitable tool.The tightening torque is dependent on
the selected process connection.
■After screwing in, make sure that no damage or cracks have occurred at the process
connection.
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

5.3 Electrical mounting and integration into the installation
The connection cable must provide basic insulation for external circuits of protection
class I. The instrument must be able to be switched off completely by means of a switch
or a control unit. Depending on the load, additional protective measures, e.g. for motor
protection, may be required
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
▶The instrument may only be installed and mounted by skilled personnel.
▶Switch off the load circuit before starting work and secure against being
switched on unauthorised
Cable preparation
Provide strain relief for the installed cables (e.g. integrated in cable gland).The cable
gland(s) used must be suitable for achieving an IP66 ingress protection. Size the
connecting cables for the largest current strength in the circuits and ensure sufficient UV
resistance and mechanical stability.
Recommendation: 4-wire cable with conductor cross-section of 0.5 ... 2.5 mm²
(AWG 20 ... 14). Fit wire ends with end splices. Conductor cross-section for end splices
with plastic sleeve ≤ 1.0 mm² and for end splices without plastic sleeve ≤ 1.5 mm².
Carry out the terminal assignment according to the switching function tightening
torque: 0.7 ... 0.5 N/m approx.
Grounding
Include the ground connection in the inside of the instrument into the grounding concept
of the installation. Maximum conductor cross-section 4 mm²
Clamping the cable
5.4 Switch point setting
For an exact setting of the switch point, a test assembly with pressure generation and
pressure reference is needed. This test assembly can, for example, be realised with a
model CPG1500 precision digital pressure gauge and a model CPP30 hand test pump (not
shown).
Remove cover screw for electrical
connection
Remove dummy cap and fix cable gland
Electrical connection
Close cover and fix again with screw
1. Connect the model PS-900 pressure switch, pressure reference and pressure
generation to a common pressure system.
2. Ensure that the switch point setting does not switch any loads on or off by mistake. For
visualisation of the switching function, an equivalent circuit, e.g. with a light bulb, is
recommended.
3. Drive slowly towards the required switch point pressure with the pressure generation
and pressure reference. Depending on the definition of the switch point, this must be
carried out on rising/falling pressure.
- If the instrument switches before the required switch point is reached, the switch
point setting must be turned anticlockwise (+) with the socket wrench.
- If the instrument switches after the required switch point is reached, the switch point
setting must be turned clockwise (-) with the socket wrench.
After each correction, release/build up the pressure and repeat this procedure until the
switch point is set correctly.
4. After setting, refix the locking device back in position to prevent unauthorised
adjustment of the setpoint.
For instruments with adjustable switch differential directly in the connection, follow the
instructions in the next chapter
Remount lock plate and screw
For instrument
holding
For tightening
1 & 2 For dual switch
1 - single / dual switch - side connection
2 - dual switch - top connection
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

6. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the instrument
must be taken out of operation immediately.
Ensure that there is no pressure in the instrument and that the load circuit is
switched off. Protect against being put into operation accidentally.
Contact the manufacturer.
If a return is needed, please follow the instructions given in chapter 8.2 “Return”.
WARNING!
Physical injuries and damage to property and the environment caused by
media
Upon contact with hazardous media, harmful media (e.g. corrosive, toxic,
carcinogenic), and also with refrigeration plants and compressors, 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 or vacuum 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.
For contact details see chapter 1 “General information”.
Faults Causes Measures
Contact is not
switching in
accordance with the
specification at the
set switch point/reset
point
Electrical connection is
interrupted.
Carry out a continuity test on the
electrical connection lines.
Wiring error, e.g. short
circuit.
Check the pin assignment and
correct it if necessary.
Electrical load
unsuitable for the
switch contact model.
Maintain the permissible electrical
loads for the switch contact model.
Contact contaminated. Replace instrument
Switch differential
greater than the switch
point.
Carry out switch point setting
with matching test assembly,
see chapter 5.4.
Vibrations Decouple the instrument
mechanically.
Short circuit Moisture in the
instrument.
Only use in ambient conditions
for which the ingress protection is
suitable.
Process connection
Cover
Range scale
Lock plate
Range screw
Cable entry
Cable entry
Blow-out disc
Deadband
5.5 Setting of the switch differential (model PS-902 & PS-903)
The handling instructions described here cannot be carried out on instrument versions
with fixed switch differential.
Before setting the switch differential, the handling steps in chapter 5.4 “Switch point
setting” must be carried out.
5. Release/build up the pressure slowly and check the reset point. By rotate range
settting screw anticlock wise to increase the reset point @ desired value on falling
pressure.
To increase the dead band by rotate the allen key anti clock wise, switch point alone
increase on rising pressure.
After correcting the switch differential, the switch point must be re-checked.
6. If the switch point and the reset point coincide with the required pressure values, the
switch point and switch differential setting is complete, after setting lock end cap.
7. Close the cover again and fix it with the 4 supplied screws,
8. see chapter 2.1 “Overview”.
5.6 Commissioning
■Check that the following torques for screw connections are maintained:
- Clamping screws and screw for locking plate: Approx. 0.6 Nm
- Case screws: Approx. 1.25 ... 1.5 Nm
■Check the sealing at the process connection over the entire operating pressure range
before commissioning.
■Pressure surges must be avoided at all costs, open the shut-off valves slowly.
■The instrument must not be subjected to any external loading (e.g. use as a climbing
aid, support for objects)
Remove the deadband end cap and adjust deadband spring adjuster screw with
allen key
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

6. Faults
CAUTION!
Physical injuries and damage to property and the environment
If faults cannot be eliminated by means of the listed measures, the instrument
must be taken out of operation immediately.
Ensure that there is no pressure in the instrument and that the load circuit is
switched off. Protect against being put into operation accidentally.
Contact the manufacturer.
If a return is needed, please follow the instructions given in chapter 8.2 “Return”.
WARNING!
Physical injuries and damage to property and the environment caused by
media
Upon contact with hazardous media, harmful media (e.g. corrosive, toxic,
carcinogenic), and also with refrigeration plants and compressors, 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 or vacuum 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.
For contact details see chapter 1 “General information”.
Faults Causes Measures
Contact is not
switching in
accordance with the
specification at the
set switch point/reset
point
Electrical connection is
interrupted.
Carry out a continuity test on the
electrical connection lines.
Wiring error, e.g. short
circuit.
Check the pin assignment and
correct it if necessary.
Electrical load
unsuitable for the
switch contact model.
Maintain the permissible electrical
loads for the switch contact model.
Contact contaminated. Replace instrument
Switch differential
greater than the switch
point.
Carry out switch point setting
with matching test assembly,
see chapter 5.4.
Vibrations Decouple the instrument
mechanically.
Short circuit Moisture in the
instrument.
Only use in ambient conditions
for which the ingress protection is
suitable.
Faults Causes Measures
Contact chatter
(repeated, short-dura-
tion opening and
closing).
Vibrations Decouple the instrument
mechanically.
Process pressure
fluctuation
Fit the pulsation dampener and
adjust the damping screw as
required
Switching status
remains unchanged
despite reaching the
switch point/reset
point.
Error with switch point
setting.
Carry out switch point setting
with matching test assembly,
see chapter 5.4.
Contacts defective
(e.g. fused contact
zone).
Replace instrument Before recom-
missioning the new instrument,
provide a protective circuit for the
contact.
Pressure port blocked. Replace instrument.
Leakage Carry out a leak test. Seal the
process connection or replace the
instrument.
Insufficient pressure Check the process line pressure
with pressure gauge.
For the exchange of the instrument chapters 8 “Dismounting, return and disposal”
and 5.6 “Commissioning, operation” must be observed.
7. Maintenance and cleaning
7.1 Maintenance
The instruments are maintenance-free.
The switch point setting must be checked after 6 months. Carry out switch point setting
with matching test assembly, see chapter 5.2.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
Physical injuries and damage to property and the environment
Improper cleaning may lead to physical injuries and damage to property and the
environment. Residual media in the dismounted instrument can result in a risk to
persons, the environment and equipment.
▶Carry out the cleaning process as described below.
1. Before cleaning, correctly disconnect the instrument from the pressure supply and
switch the load circuit off.
2. Use the requisite protective equipment.
3. Clean the instrument with a moist cloth.
Electrical connections must not come into contact with moisture!
CAUTION!
Damage to the instrument
Improper cleaning may lead to damage to the instrument!
▶Do not use any aggressive cleaning agents.
▶Do not use any hard or pointed objects for cleaning.
4. Wash or clean the dismounted instrument, in order to protect persons and the environ-
ment from exposure to residual media.
8. Dismounting, return and disposal
WARNING!
Physical injuries and damage to property and the environment through
residual media
Residual media in the dismounted instrument can result in a risk to persons, the
environment and equipment.
▶Observe the information in the material safety data sheet for the corresponding
medium.
▶Wash or clean the dismounted instrument, in order to protect persons and the
environment from exposure to residual media.
8.1 Dismounting
WARNING!
Risk of burns
During dismounting there is a risk of dangerously hot media escaping.
▶Let the instrument cool down sufficiently before dismounting it!
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
▶The dismounting of the instrument may only be carried out by skilled personnel.
▶Remove the instrument once the system has been isolated from power
sources.
WARNING!
Physical injury
When dismounting, there is a danger from aggressive media and high pressures.
▶Observe the information in the material safety data sheet for the corresponding
medium.
▶Dismount the instrument when there is no pressure.
8.2 Return
Strictly observe the following when shipping the instrument:
All instruments delivered to WIKA must be free from any kind of hazardous substances
(acids, bases, solutions, etc.) and must therefore be cleaned before being returned.
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WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900

WARNING!
Physical injuries and damage to property and the environment through
residual media
Residual media in the dismounted instrument can result in a risk to persons, the
environment and equipment.
▶With hazardous substances, include the material safety data sheet for the
corresponding medium.
▶Clean the instrument, see chapter 7.2 “Cleaning”.
When returning the instrument, use the original packaging or a suitable transport
packaging.
8.3 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-specific waste disposal regulations.
9. Specifications
Operating conditions
Permissible temperature ranges
Ambient: -10 ... +60 °C (14 ... 140 °F)
Medium: -10 ... +170 °C (14 ... 338 °F) for SS 316L
-10 ... +110 °C (14 ... 230 °F) for Brass
Storage: -10 ... +60 °C (14 ... 140 °F)
Ingress protection
IP66 per IS/IEC 60529
Setpoint repeatability
±0.5% of FSR
Scale accuracy
±5% of FSR
Switching function
■1 × SPDT (single pole double throw)
■2 × SPDT (double pole double throw) for DPDT action synchronising
error within 2% of FSR
Setting range
Code Range
(1), (3)
MWP
(4)
Switching dierential for contact versions (2)
901 - Fixed with 902* Narrowband
adjustable
903 - Wideband
adjustable
1 ×
SPDT
2 ×
SPDT
1 ×
SPDT
2 ×
SPDT
1 ×
SPDT
2 ×
SPDT
unit: bar or Kg / Cm²
B001/
K108 –1 ... 0 4 0.15 0.2 - - - -
B026/
K107 0.2 ... 1.6 9 0.16 0.2 0.16 ... 0.32
0.20 ...
0.32
0.20 ...
0.96
0.30 ...
0.96
B030/
K093 0.4 ... 4 9 0.24 0.4 0.24 ... 0.8
0.4 ...
0.8
0.4 ...
2.4
0.6 ...
2.4
B032/
K102 0.7 ... 7 18 0.42 0.7 0.42 ... 1.4
0.7 ...
1.4
0.7 ...
4.2
1.05 ...
4.2
B033/
K095 1 ... 10 18 0.6 1 0.6 ... 2.0
1 ...
2.0
1 ...
6.0
1.5 ...
6.0
B035/
K096 1.6 ... 16 25 0.96 1.6 0.96 ... 3.2
1.6 ...
3.2
1.6 ...
9.6
2.4 ...
9.6
B037/
K077 4 ... 25 36 1.5 2.5 1.5 ... 5.0
2.5 ...
5.0
2.5 ...
15.0
3.75 ...
15.0
B038/
K098 8 ... 32 36 1.92 3.2 1.92 ... 6.4
3.2 ...
6.4
3.2 ...
19.2
4.8 ...
19.2
B064/
K109 7 ... 35 52 2.1 3.5 2.1 ... 7.0
3.5 ...
7.0
3.5 ...
21.0
5.25 ...
21.0
(1) In the absence of customer specification, the switch point will be preset on falling
pressure to the mid point of the range [I.e. 50% of span + minimum range value]
(2) The values indicate the maximum achievable limits of switch differential.
(3) Set and reset point of the switch should not exceed the upper and lower range limits.
(4) Maximum working pressure that the sensor element can withstand without suffering
any permanent damage.The instrument might have to be calibrated afterwards
7
8
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900
WIKA operating instructions, pressure switch, high adjustability of switch differential, model PS-900