83
8024250/18HT/V2-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-G
Subject to change without notice
TROUBLESHOOTING
11
11
Troubleshooting
11.1
Strongly fluctuating O
2
measured value
11.2
O
2
display remains at end of measuring range or is higher than expected
11.3
Indications on the display are OK, mA output signal is not correct
Possible cause
Notes
Loose contact due to wire breakage of
the measuring signal wire
Remove loose contact.
Loose contact in the analyzer
electronics (internal mV tap)
Broken filter element
Visual inspection by removing the analyzer unit.
Incorrectly installed V-shield
Analyzer unit was installed without
filter head
Possible cause
Notes
Leakage on the measuring cell or mea-
suring cell flange seal.
Check all flanges and screw fittings for leaks. Replace the
measuring cell or renew the measuring cell flange seal. If
there is a leak in the area of the O
2
measuring cell, it must
be replaced.
Analyzer unit flange leaking.
Tighten the flange screws to the required torque.
Possible cause
Notes
Control unit is defective - mA value not
available
Check measuring range. Check whether the current value
is outside the measuring range.
Measure the mA output on the terminal strip PWRB.X5:17
A/B.
