SICK PFT Manual De Instrucciones página 33

Operating Instructions
Failure
No output signal
No/False output signal
Output signal unchanged after change in
pressure
Signal span dropping off/too small
Signal span erratic / incorrect
Abnormal zero point signal
*) Make sure that after the setting the unit is working properly. In case the error continues to exist send in the instrument for reparation (or
replace the unit).
8013155/ZZV8/2018-06-25
10. Trouble shooting
Possible cause
Cable break
No/incorrect voltage supply or current
spike
Incorrectly wired (e.g. Connected as 2-wire
instead of 3-wire system)
Mechanical overload through overpres-
sure
Mechanical overload through overpres-
sure
Diaphragm is damaged, e.g. through
impact, abrasive/agressive media; corro-
sion of diaphragm/pressure connector;
transmission fluid missing.
Seal/Sealing face damaged/contami-
nated, seal mounted incorrectly, threads
crossed
Electromagnetic interference source in
the vicinity, e.g. inverter drive
Working temperature too high/too low
Instrument not grounded
Violent fluctuations in the process media
pressure
Working temperature too high/too low
Abnormal mounting position
Overload limits exceeded
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Procedure
Check connections and cable
Adjust the voltage supply to correspond
with the Operating Instructions *)
Follow pin assignment (see Instrument
Label / Operating Instructions)
Replace instrument; if failure reoccurs,
consult the manufacturer *)
Replace instrument; if failure reoccurs,
consult the manufacturer *)
Contact the manufacturer and replace the
instrument
Clean the seal/sealing face, possibly
replace the seal.
Shield the device; shield the cables;
remove the interference source
Ensure permissible temperatures as per
the Operating Instructions
Ground instrument
Damping; consult with manufacturer
Ensure permissible temperatures as per
the Operating Instructions
Correct the zero point through the potenti-
ometer, control panel or software
Ensure permissible overload limits are
observed (see Operating Instructions) *)
PFT
GB
33