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USER HANDBOOK
If the LEL sensor is exposed to a gas reading above 100%
LEL, the instrument vibrates, the displayed value changes
to 4 rising arrows, the backlight illuminates red, the tone of
the audible alarm changes, and the visual alarm LED’s ash
quickly. The ashing message ‘DANGER OVER RANGE’ is
displayed, as shown in Fig 4-3:
Fig. 4-3 Over Range Alarm
Switch OFF by a press and hold of both buttons together.
A timer, counting down from 10 seconds to zero, is displayed
together with the message ‘GET OUT’ alternating with ‘HIGH
GAS’, as shown in Fig. 4-4:
. . . alternating until zero is reached
Fig. 4-4 ‘Get Out’ / ‘High Gas’ Timer
The instrument must be returned to a gas free area or sample
clean air. The instrument must now be switched OFF.
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