WIKA FSD-4, Operating Instructions Manual

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14399527.01 05/2021 EN/DE/FR/ES
23 WIKA operating instructions flow switch, model FSD-4
EN
WARNING!
Physical injuries and damage to property and the environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable or toxic substances), harmful
media (e.g. corrosive, toxic, carcinogenic, radioactive), and also with refrigeration plants and compres-
sors, there is a danger of physical injuries and damage to property and the environment.
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Should a failure occur, aggressive media with extremely high temperature and under high pressure
or vacuum may be present at the instrument.
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For these media, in addition to all standard regulations, the appropriate existing codes or regulations
must also be followed.
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Wear the requisite protective equipment.
For contact details see chapter 1 “General information” or the back page of the operating instructions.
In the event of any faults, first check whether the flow switch is mounted correctly, mechanically and electrically.
If complaint is unjustified, the handling costs will be charged.
Fault Possible cause Measure
No output signal Cable break Check the continuity
No/wrong supply voltage Rectify the supply voltage
No output signal/cable break Mechanical load too high Replace probe with a suitable design
No/wrong output signal Wiring error Observe the pin assignment
Wrong output signal Process temperature out of measuring range;
sensor drift caused by overtemperature
Check temperature range
Sensor break/short-circuit Send the instrument to the manufacturer
Sensor drift caused by chemical attack Check media compatibility
Wrong output signal and too long
response time
Wrong mounting geometry, for example mounting
depth too small and heat dissipation too high
Move the temperature-sensitive area of the
sensor into the medium
Deposits on the sensor element Remove deposit
Signal span too small Supply voltage too high/low Rectify the power supply
Signal span drops Moisture has entered Fit the cable correctly
6. Faults