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1. General information
The mechanical pressure switch described in the operating instructions has been
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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.
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Working safely requires that all safety instructions and work instructions are observed.
Observe the relevant local accident prevention regulations and general safety
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regulations for the instrument's range of use.
The operating instructions are part of the product and must be kept in the immediate
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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
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prior to beginning any work.
The manufacturer's liability is void in the case of any damage caused by using the
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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.
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Subject to technical modifications.
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Further information:
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- Internet address:
www.wika.co.in
- Relevant data sheet:
PV 35.60 . 01/2022
Abbreviations, definitions
DPDT
Double pole double throw
SPDT
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
WIKA operating instructions, pressure switch, model PS-600
2. Design and function
2.1 Overview
2.2 Description
The pressure element of the model PS-600 is a resilient 316 LSS diaphragm 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 greater 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
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Operating instructions
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Cross-check scope of delivery with delivery note.
Process connection
Cover
Range scale
Lock plate
Range screw
Cable entry
Cable entry
Blow-out disc
ˆ
Deadband
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