On toxic and oxygen instruments, it is practical to
replace the alkaline batteries at the same time
(Section 6.2).
•
Disassemble in a clean, dry environment and
observe anti-static handling precautions.
•
Switch off instrument
•
Remove side fixing screws
•
Remove top moulding
•
Unplug sensor
•
Replace sensor with same type only
•
Re-use sensor sealing ring
•
Ensure main body ‘O’ rings and sounder ‘O’
ring are in place before refitting top moulding.
•
Secure with screws
•
Zero and calibrate instrument
11. Troubleshooting Guide
Instrument may be customer configured such that:
•
display is blanked
•
no ‘confidence’ signals given
•
cannot switch off
•
adjustment potentiometer not active
These features may be individually re-enabled if
required (Section 12).
If the instrument is reading low levels of gas in
fresh air, it needs to be zeroed (Section 8.3).
Replace or recharge batteries if unit will not
switch on. If rechargeable instruments do not
seem to be charging, force some charge into
Gasman II
Instruction Manual
Issue 5
Page 24
11/99
