RKI Instruments SD-705EC - Manual (Page 19)

PT2E-1140
４． Maintenance and Inspection
The gas detection alarm is kept in continuous operation over a long period of time and must
perform a vital role as a safety device. For this purpose, periodical inspection must be made.
The High-pressure Gas Safety Act in Japan sets forth the obligation of periodical inspection of
the gas detection alarm.
-Maintenance Contract-
☆ To maintain the safety operation of detector, it is recommended to keep the
maintenance contract with service agent for regular maintenance, adjustment and
overhaul etc. including the gas sensitivity adjustment.
For the detail of maintenance contract, contact nearest agent.
４−１ Inspection Frequency and Items
The inspection includes a daily inspection which a person in charge of control and operation of
the gas detection alarm performs inspection before work once a day, and periodical inspections
conducted by the service personnel of a manufacturer. The inspection items are confirmation
of the concentration indication on the detector side and confirmation of lights, concentration
indication and alarm function on the indicating alarm side. It is also necessary to carry out gas
calibration at least every 6 months. The law sets forth that the unit must issue the alarm
during the circuit inspection related to alarm while providing normal operation, at least, once a
month.
Contents of inspection Inspection
Point/item Daily inspection Monthly inspection
Judgment
Status light
check
Check if the
“PW/TR” LED
light(power light)
is ON.
Brightness of
“PW/TR” LED light
is good. The “PW/TR” LED light must be ON. If
flickering, take an appropriate measure
according to 5-2. Troubleshooting guide.
Gas consent.
indication
check
Check if the gas
consent. indication
of the indicator is
zero.
Same as daily
inspection
The gas concentration indication must be zero
in the clean atmosphere. If not, carry out zero
adjustment according to the zero adjustment
method.
Equipment
installation
state check
Check if there is any
obstruction for
detection of the gas
concerned.
Same as daily
inspection
No obstruction for gas detection. If any,
remove such obstruction or move the unit to
another place.
Sensor check
Check if the gas inlet
is covered with dust
or water or if it is
discolored.
Same as daily
inspection
No abnormality in gas inlet. If it is covered
with dust or water, remove and carry out zero
and span adjustments according to 4-4 Gas
Sensitivity Calibration Method. If cannot be
adjusted, consult with RIKEN KEIKI.
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