7 Maintenance
7-1. Maintenance intervals and items
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GD-D58 Series
7
Maintenance
The detector head is an important instrument for the purpose of safety.
To maintain the performance of the detector head and improve the reliability of safety, perform a regular
maintenance.
Continuing to use the detector head without performing a maintenance will compromise the sensitivity of
the gas sensor, thus resulting in inaccurate detection.
7-1. Maintenance intervals and items
Daily maintenance:
Perform maintenance before beginning to work.
Monthly maintenance: Perform alarm test once a month.
Regular maintenance: Perform maintenance once or more every six months to maintain the
performance as a safety unit.
Maintenance item
Maintenance content
Daily
maintenance
Monthly
maintenance
Regular
maintenance
Power lamp check
Check that the power lamp lights up.
Status display check
Check that the status display is "run" and
that the fault lamp is off.
Flow rate check
Check that the float of the dust removal
filter with flow monitor is visible.
Gas concentration
display*
Check that the gas to be detected does
not remain near the detector head
(sampling point) and that the reading is
normal.
Alarm test*
Check the alarm circuit by using the alarm
test function.
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Span adjustment*
Perform the sensitivity calibration by using
the calibration gas.
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Gas alarm check*
Check the gas alarm by using the
calibration gas.
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Flow sensor check
Check the flow sensor by using the test
pump.
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* Check and adjust at the indicator/alarm unit side. For details, see the operating manual of the indicator/alarm unit.
