Endress+Hauser nivocompact FTC 731 Installation And Operating Manual page 25

Troubleshooting
Error with maximum fail-safe mode
Probe free (level below maximum)
but with
electronic switch blocked
LED on
Probe covered (level above maximum)
but with
electronic switch connected
LED off
Error with minimum fail-safe mode
Probe covered (level above minimum)
but with
electronic switch blocked
LED on
Probe free (level below minimum)
but with
electronic switch connected
LED off
Guarantee
Our guarantee terms are included with the documents included with
delivery. Copies may also be obtained from the agent responsible.
Any modification carried within the instrument during the guarantee period
invalidates the terms of the guarantee.
Possible causes
- High material build-up on the
vessel wall or on probe rod
- Water in housing
- Dielectric constant of the
material too small
- Drier (or different) material now
in silo than expected on
calibration
Possible causes
- Dielectric constant of the
material too small
- Drier (or different) material now
in silo than expected on
calibration
- Material has formed cavities
- Probe rod broken off
- High material build-up on the
vessel wall or on probe rod
- Water in housing
Fig. 22
Troubleshooting with maximum fail-safe
mode.
Fig. 23
Troubleshooting with minimum fail-safe mode.
23