5. Operation
5.1 Switch-on Sequence
Make sure you are in clean air, then switch on
the instrument by pressing the large button.
The instrument tests all LCD segments, red alarm
LEDs and sounder for 5 seconds, then displays
the battery condition for 5 seconds before
entering monitoring mode. The battery condition
is indicated by the battery symbol and a number
representing the percentage battery capacity
remaining.
NOTE: A reading below 20 indicates that
replacement or recharging is due. For the
first 4-5 charge cycles, rechargeable batteries
cannot hold a full charge. Initial operation
time is therefore around 7
1
/
2
hours.
The instrument is now ready to be used:
•
The gas level will be shown numerically on
the display.
•
The instrument may be configured to display
nothing (alarm only application).
•
The display backlight is activated by pressing
and holding the large button.
•
If the display shows an E code (e.g. E2)
instead of the gas level, this indicates a fault
condition as defined in Section 11.1.
Figure 5.1 Typical monitoring display.
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