Faults - WIKA PS-600 Operating Instructions Manual

5.5 Setting of the switch differential (model PS-602)
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.
Remove the deadband end cap and adjust deadband spring adjuster screw with
allen key
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)
WIKA operating instructions, pressure switch, model PS-600

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
Contact is not Electrical connection is
switching in interrupted.
accordance with the
Wiring error, e.g. short
specification at the
circuit.
set switch point/reset
Electrical load
point
unsuitable for the
switch contact model.
Contact contaminated. Replace instrument
Switch differential
greater than the switch
point.
Vibrations
Short circuit Moisture in the
instrument.
Measures
Carry out a continuity test on the
electrical connection lines.
Check the pin assignment and
correct it if necessary.
Maintain the permissible electrical
loads for the switch contact model.
Carry out switch point setting
with matching test assembly,
see chapter 5.4.
Decouple the instrument
mechanically.
Only use in ambient conditions
for which the ingress protection is
suitable.
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