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Maintenance
Function Control
Check for correct operation of limit detection by increasing and decreasing
the level in the silo at roughly the same height as the probe end.
Final Points
Screw the housing cover securely down after connection and calibration so
that the standards comply to Protection IP 55 or IP 66.
For applications in the open, a protective sun cover (accessory) is to be
used to cover the aluminium housing of the Nivocompact.
Maintenance
The capacitive level limit switch Nivocompact FTC 831 requries no
maintenance when correctly installed and used properly under the normal
conditions specified by the system.
When cleaning and checking the silo:
• Examine the probe to check for damage, especially to the cable.
• Remove any material build-up on the end of the probe
With initial but permanently low material build-up:
• Carry out another capacitance calibration after the material build-up if the
Nivocompact does not switch correctly.
Ensure that the cable gland and housing cover are tight fitting so that no
moisture can enter.
Troubleshooting
When an error is indicated, first check to make sure that
• The Nivocompact is properly connected
• Earthing and ground connection are correct
• A power supply exists at the terminals
• All instruments connected are operating correctly
• In the case of the electronic insert EC 40, the minimum required load of
the connected instruments is at least present
• The correct fail-safe mode has been chosen
• The switching delay has been correctly set
• The capacitance calibration has been carried out correctly
Carry out a function control (see "Calibration")
Refer to the Error Tables, Fig. 20 and Fig. 21.
23
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