71
8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
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 probe (internal
mV tap)
Broken filter element
Visual inspection by removing the probe.
Incorrectly installed V-shield
Probe was installed without filter head
Possible cause
Notes
Leakage on the measuring cell or
measuring cell flange seal.
Check all flanges and screw connections 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.
Probe 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 .
