9
Service routine attention
The owner or occupier of the site should place the supervision of the system in the charge
of a responsible executive, whose duty it should be to ensure the day to day operation of
the system and to lay down the procedure for dealing with a gas alarm or fault warning.
The operating instructions should be kept available preferably with the control unit, all faults,
service test and routine attention given should be recorded.
DAILY:
A check should be made that any fault condition which may be indicated is in fact
being attended to and that all other indicators are normal.
WEEKLY:
Check the catch pot for high levels of particulate or water contamination, replace
filters as neccesary. On sites involving a high risk process or having gases which may cause
loss of sensitivity a check on calibration should be carried out.
Twice yearly maintenance schedule
1. Zero check to sensor
2. Sensor to be gas tested and reading logged (sensitivity checked).
3. Field indicators to be tested.
4. Alarm trip points checked and re-aligned.
5. All faulty parts replaced where required.
6. All filter elements checked and replaced as necessary (catch pot filter – end of line filter
– in line filter).
7. Power supply – voltage check.
8. Visual inspection made to confirm that the sample line fittings and equipment is secure,
undamaged and adequately protected.
9. Logger batteries replaced (if fitted).
12 Monthly maintenance schedule
1. Twice yearly schedule.
2. Draw pump overhaul (diaphragm replacement).
3. Auto drain – pressure tube replacement (if fitted)
24 Monthly maintenance schedule
1. Pump replacement
Recommended test gas:
Summary of Contents for 301
Page 10: ...Project Modifications 10 ...
Page 11: ......
