PT1E-0930
28
７．MAINTENANCE CHECK
This is an important for security and safety. To maintain the security and enhance the reliability of safety,
the reliability of safety, the regular maintenance check for it shall be absolutely necessary.
７－１．Frequency of maintenance and check items.
７－１－１．Daily check
This is the check items carried out by customer.
①
Check of PW/TR light.
In normal operation, the light is at on condition.
②Check of LED reading
Check that LED reading is zero (0).
If it is not “0”, check that gas is free around detector head and make zero adjustment at detector head side.
③Alarm test
Check that the alarm light flashes and buzzer sounds.
７－１－２．Regular maintenance check
The following items shall be checked at regular check.
①Daily check
②Cleaning of this unit
③Adjustments
④Function check
⑤Parts replacement
⑥Others
７－２．Zero adjustment
CAUTION
For the alarm test, refer to “5-5-6 Alarm test.”
CAUTION
This indicator/alarm unit is to receive regulated 4-20mA signal. Zero adjustment shall be
done at detector head side.
