6 Maintenance
6-1. Maintenance intervals and items
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6
6
Maintenance
The detector is an important instrument for safety.
To maintain the performance and reliability of the detector, perform a regular maintenance.
Continuing to use the detector without performing maintenance might cause the sensitivity degradation,
thus resulting in inaccurate detection.
6-1. Maintenance intervals and items
Daily maintenance:
Perform maintenance before beginning to work.
Monthly maintenance:
Perform maintenance on the alarm circuit (alarm test) once a month.
Regular maintenance:
Perform maintenance once or more for every six months to maintain
the performance as a safety unit.
Maintenance item
Maintenance content
Daily
mainte-
nance
Monthly
mainte-
nance
Regular
mainte-
nance
Status display check Check that the status indicates normal
measurement state.
○
○
○
Gas concentration
display
Check that a gas to be detected is not present
around the detector and that the reading
indicates a normal value.
○
○
○
External alarm test*
Inspect the alarm circuit by using the alarm test
function.
－
○
○
Span adjustment
Perform the span adjustment by using the
calibration gas.
－
－
○
Gas alarm check
Check the gas alarm by using the calibration gas.
－
－
○
* Check and adjustment are performed at the indicator/alarm unit side. See the operating manual of the
indicator/alarm unit for details.
