OLCT 60
FIXED POINTGAS MONITOR
USER MANUAL
NPO60GB
Revision F.2
23
5
Maintenance
Maintenance primarily comprises changing any sensors that no longer meet their initial
metrological characteristics.
Since they are liable to affect detection reliability, the tasks described in this chapter
are reserved for authorized trained personnel only. Inspection and maintenance shall
be carried out in accordance with EN/IEC 60079-17 standards in force or with other
national standards.
5.1
Possible errors
The table below summarizes the various possible detector errors.
Observed default
Possible cause
Action
(page )
current output is at 0 mA
Connector cable
Power supply
Check cable
Check voltage at detector terminal
34
-
Electronic card
Change board
-
0 mA < current output < 1mA
Sensor
Line resistance too high
Power supply
Change sensor
Check cable
Check voltage at detector terminal
23
-
-
Improper calibration gas
Check the content of the calibration gas
-
current output is at 0.83 mA
GD10P optics are duty
GD10P in fault
refer to the
GD10P manual
Zero setting not possible
Sensor
Electronic card
Change sensor
Change board
Sensitivity adjustment not
possible
Sensor
Electronic card
Change sensor
Change board
«SUP» display
Over-Range condition
Valid with the magnet
Check the span
5.2
Replacing sensor block
The sensor block or detection module encloses the sensitive element and the corresponding
electronics. A sensor block can only be associated with a defined detector; so an oxygen
detection module will not be installed in the place of a LEL detection module.
Summary of Contents for OLCT 60
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