Maintenance
6-2
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
6.1 Messages
The ULTRAMAT 23 can detect and display various fault statuses. The
fault statuses are divided into maintenance requests and fault
messages.
6.1.1 Maintenance Requests
Maintenance requests are references to certain changes in the
analyzer which - at the time they are made - have no influence on the
analyzer measurements. However, remedial measures are
recommended to guarantee that measurements remain possible.
If the analyzer is in measuring mode, the occurrence of a maintenance
request is indicated by an ”M” at the right edge of the display.
Maintenance requests are logged and can be called in input mode
using the menu path ”Analyzer status - Status - Maintenance requests”
(see Section 5.7.1.2). The corresponding message texts are stored.
You can delete the messages by pressing the ENTER key. However,
they appear again if the cause has not been eliminated.
The analyzer outputs a maintenance request in the following three
cases:
Message ”AUTOCAL drift beyond tolerance”
The zero drift of a component is too large during the AUTOCAL
procedure. The calibration parameters can be entered as described in
Section 5.8.4. The actual deviation from the maximum permissible
value can be read using the AUTOCAL deviation (see Section
5.10.2.2). It may be meaningful to set a shorter interval between two
AUTOCAL procedures, otherwise contact the servicing department.
Message ”O
2
sensor”
The measuring voltage of the O
2
sensor has dropped as a result of
aging, but is still within the permissible range. This means that it is not
necessary to replace the O
2
sensor immediately, but this will soon be
used up. Order a new O
2
sensor if necessary.
Message ”LCD temperature beyond tolerance”
The contrast control is no longer guaranteed if the LCD temperature is
outside the permissible tolerance. It may then be difficult to read the
display.
The ambient temperature is too high, provide sufficient ventilation or air
conditioning. If the fault still occurs, contact the servicing department.
Signaling via binary inputs (only with option module).
AUTOCAL-drift beyond
tolerance
press ENTER to clear
next message with - >
AUTOCAL drift
beyond tolerance
O
2
Sensor
LCD temperature
beyond tolerance
External
maintenance
request
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