Endress+Hauser silometer FMC 671 Z - Page 54

Fault analysis Table 9.2 contains a list of possible faults and their remedies.
Sensor/
channel
Fault Cause and remedy
Capacitance
Channel 1
Measured value wrong
•
Incorrect calibration? Check measured
value before linearisation, V0H9
- If not correct, check whether full and empty
calibration correct V0H1/V0H2
•
If correct, check linearization parameters
- Check operating mode, V8H0
•
Change in product
- Recalibrate
•
Build-up
- Wire electronic insert for build-up, recalibrate
•
Probe damaged, bent or pressed to side of
vessel
- Check and remedy
•
Condensation in connection compartment
Deltapilot S
Channel 1
Measured value wrong
•
Incorrect calibration? Check measured
value before linearisation, V0H9
- If not correct, check whether full and empty
calibration correct V0H1/V0H2
•
If correct, check linearization parameters
- Check operating mode, V8H0
•
Change in density of product
- Recalibrate
•
Sensor damaged
- Check and remedy
Capacitance
Deltapilot S
Channel 1
Relays do not trip correctly
•
Incorrect settings, e.g. configured in wrong
units
- Check correct units used for all relay settings
- Check relay assignments, V1H4, V1H9
- Simulate settings in simulation mode - see
Section 9.3, if the relays switch, check wiring
Capacitance
Channel 2
Does not switch correctly
•
Incorrect calibration?
-V1H7
≥
V8H6?
- Change in product, build-up
•
Settings wrong
- Check type of probe, fail-safe function,
switching delay
•
Probe damaged, bent or pressed to side of
wall
Liquiphant
Soliphant
Channel 2
Does not switch correctly
•
Build-up
- Clean regularly
•
Settings wrong
- Check type of probe, fail-safe function,
switching delay
•
Probe damaged or bent
Table 9.2:
Trouble shooting table for
incorrect function without error
message
Silometer FMC 671 Z/676 Z Chapter 9: Trouble-Shooting
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