14247390.02 11/2019 EN/DE/FR/ES
16
WIKA operating instructions, pressure sensor, model A-1200
EN
6. Faults
WARNING!
Physical injuries and damage to property and the environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen) 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, 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.
▶
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 pressure sensor 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 output signal
No/wrong supply voltage
Rectify the supply voltage
No/wrong output signal
Wiring error or switching of switching logic
Observe the pin assignment
Check the output configuration
Constant output signal upon change in
pressure
Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Deviating zero point signal
Overload safety exceeded
Observe the permissible overload safety
Signal span too small
Mechanical overload caused by overpres-
sure
Replace instrument; if it fails repeatedly,
contact the manufacturer
Signal span too small
Supply voltage too high/low
Rectify the supply voltage
Signal span drops
Moisture has entered
Fit the cable correctly
Warnings and errors
Via the three-coloured status display, internal instrument warnings (yellow) and errors (red) are shown, see chapter 5.6
“Colour codes of status display”. An extended error diagnosis is possible via IO-Link.