Other Faults - Siemens FIDAMAT 6 Operating Instructions Manual

Maintenance
No. Fault message
S12 Mains power supply
Mains frequency /
S13
hardware
Measured value
greater than
S14
characteristic final
value
(+ 5%)
S15 Calibration aborted
Table 6-2: Causes of fault messages

6.5.3 Other faults

Fault
Large zero point drift towards +
Large span drift
Sensitivity markedly dependent on flow rate
Table 6-3: Causes of unstable measured-value readings
6-8
Possible causes
Mains power supply out of
tolerance
Mains frequency out of
tolerance
Internal power supply out of
tolerance
Incorrect calibration,
wrong test gas,
sample concentration too high
During an AUTOCAL run the
process was aborted
Within an appropriate period of time according to the drift information
(see also "Technical data" on page 2-14) the unit should be calibrated at
the zero point (function 20) and at deflection (function 21) using the
corresponding test gases.
Attention should be given to clean gas preparation.
In most cases a greater zero point drift is an indication of matter or dust
particles being deposited in the analysis chamber (see "Cleaning"
on page 6-4).
Possible cause and remedy
Check gas preparation (filter), clean analysis
chamber (see "Cleaning" on page 6-4)
Detector leaking, FID nozzle defective
Exhaust gas line restricted, for example by
condensed water
Remedy
Mains voltage must be within tolerance
limits shown on nameplate
Check the diagnostic values,
replace motherboard or adapter board
Repeat calibration,
check test gas,
check measuring range
FIDAMAT 6 gas analyzer
Operating manual –A5E00222135-01