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8013153/V620/2012/03/12
© SICK AG • Germany • All rights reserved
29
Operating Instructions
PBT
Failure
Possible cause
Procedure
No output signal
Cable break
Check connections and cable
Abnormal zero point signal
Overload limits exceeded
Ensure permissible overload limits are
observed (see Operating Instructions)
Abnormal zero point signal
Working temperature too high/too low
Ensure permissible temperatures as per
the Operating Instructions
Output signal unchanged after change in
pressure
Mechanical overload through overpres-
sure
Replace instrument; if failure reoccurs,
consult the manufacturer
Signal span too small
Mechanical overload through overpres-
sure
Replace instrument; if failure reoccurs,
consult the manufacturer
Signal span erratic
Electromagnetic interference source in
the vicinity, e.g. inverter drive
Shield the device; shield the cables;
remove the interference source.
Signal span erratic / incorrect
Working temperature too high/too low
Ensure permissible temperatures as per
the Operating Instructions
Signal span dropping off/too small
Diaphragm is damaged, e.g. through
impact, abrasive/agressive media; corro-
sion of diaphragm/pressure connector;
transmission fluid missing.
Contact the manufacturer and replace the
instrument
10. Trouble shooting
GB
Please verify in advance if pressure is being applied (valves/ ball valve etc. open) and if the right
voltage supply and the right type of wiring (2-wire/ 3-wire) has been chosen?
If the problem persists, contact our sales department.
Return shipments / non-risk declaration form
Purge / clean dismounted instruments before returning them in order to protect our employees and
the environment from any hazard caused by adherent remaining media.
Service of instruments can only take place safely when a completed and signed-off non-risk decla-
ration form has been submitted and fully filled-in. This non-risk declaration form contains information
on all materials with which the instrument has come into contact, either through installation, test
purposes, or cleaning. You can find the non-risk declaration form on our internet site (www.sick.com).