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October 2020
5
Troubleshooting
5.1
Maintenance and error messages
The level switch indicates error messages while in measurement mode and
during calibration routines.
Table 5-1: In Measurement Mode
Display
UR
OR
ERR
Quick Start Guide
LED
Description
Flashing red
Under Range
Actual measured
capacitance is lower
than 3 pF.
Flashing red
Over Range
After changing the
sensitivity from ≥ 2 pF
to ≤ 1 pF.
Constant red
Auto or Manual
Function Test error
Quick Start Guide
Possible causes and
solutions
Probe is defective or
the probe is
incorrectly wired.
The signal output
relay is de-energized.
Actual calibrated
capacitance is higher
than 100 pF and
cannot be measured
with Sensitivity
setting ≤ 1 pF.
Change to Sensitivity
2 pF (if DK of the
material is high
enough) or
recalibrate.
Electronics fault.
Replace the
electronics.
The output signal
relay is de-energized.
39
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