Repair, maintenance and servicing
6.6 Removing faults
OXYMAT 64
110 Operating Instructions, 06/2008, A5E00880383-03
6.6.2 Maintenance requests
If there are indications of changes in internal device parameters, "Maintenance request"
appears in the status line. Such changes do not significantly affect the measuring quality at
the time they occur. In order to still guarantee the measuring quality, it may be necessary to
carry out remedial measures.
The following fault messages entail a maintenance request (output in the display) and are
signaled externally if a corresponding relay has been configured using function 71.
Table 6- 2 Causes of maintenance requests
No. Signal Possible cause Remedy
Calibration gas was changedW1
Q
Calibration tolerance
exceeded
Incorrect setpoint entered
Repeat calibration
W4
Q
Set clock The device was switched off New input of date and time
W6
Q
Temperature of LC display
too high or too low
Ambient temperature above
45 °C or below 5 °C
Make sure that the ambient
temperature is in the range
from 5 °C to 45 °C.
W9 External maintenance
request
External signal Check (function 72 must be
configured accordingly)
W10 Autocal check deviation Violation of the tolerance
was determined during an
"Autocal check"
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