Endress+Hauser nivocompact FTC 831, Installation And Operating Manual

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Guarantee
Our guarantee terms are included with the documents which accompany
delivery. Copies may also be obtained from the agent responsible.
Any modification carried out within the instrument during the guarantee
period invalidates the terms of the guarantee.
Error with maximum fail-safe mode Possible causes
Probe free (level below maximum)
but with
electronic switch blocked
LED on
- High material build-up
at end of probe
- Water in housing
Probe covered (level above maximum)
but with
electronic switch connected
LED off
- Dielectric constant of the
material too small
- Different material used
than calibrated for
- Drier material used
than calibrated for
- Cable damaged
Fig. 20
Troubleshooting with maximum fail-safe
mode.
Error with minimum fail-safe mode Possible causes
Probe covered (level above minimum)
but with
electronic switch blocked
LED on
- Dielectric constant of the
material too small
- Different material used
than calibrated for
- Drier material used
than calibrated for
- Cable damaged
Probe free (level below minimum)
but with
electronic switch connected
LED off
- High material build up at end of
probe
- Probe end touching silo wall or
residual material in the silo
- water in housing
Fig. 21
Troubleshooting with minimum fail-safe mode.
Nivocompact FTC 831 Troubleshooting
24