SICK LFH Manual De Instrucciones página 23

Operating Instructions
Failure
Signal span dropping off/too small
Signal span drops off
Signal span erratic or incorrect
Abnormal zero point signal
Zero point signal unstable/ too low/high
Hot instrument case surface
*) Make sure that after the assembly the unit is working properly. In case the error continues to exist.
If the problem persists, contact our sales department.
8013156/U878 /2010-05-01
9. Trouble shooting
Possible cause
Diaphragm is damaged, e.g. through
impact, abrasive/agressive media; corro-
sion of diaphragm/pressure connector;
transmission fluid missing.
Moisture present (e.g. at the cable tail)
Working temperature too high/too low
Medium or ambient temperature too high/
too low
Diaphragm is damaged, e.g. through
impact, abrasive/agressive media; corro-
sion of diaphragm/pressure connector.
Working temperature too high/too low
Moisture present (e.g. at the cable tail)
Permissible ambient or medium tempera-
ture exceeded
© SICK AG • Germany • Subject to change without notice
Procedure
Contact the manufacturer and replace the
instrument
Install the cable correctly
Ensure permissible temperatures as per
the Operating Instructions
Control the internal temperature of the
instrument within the permissible range;
observe the allowable temperature error
(see Operating Instructions)
Replace instrument
Ensure permissible temperatures as per
the Operating Instructions
Install the cable correctly,
filter element insertion
Ensure permissible ambient/medium
temperature limits are observed (see
Operating Instructions)
LFH
23