GMI PS500 Manual Del Usuario página 37

USER HANDBOOK
The instrument must be returned to a gas free area.
The instrument must now be switched off.
Note: The off cycle is increased to 10 seconds.
A countdown timer, from 10 seconds to zero, will appear on
the display together with the message 'HIGH GAS' alternating
with 'GET OUT', as shown below:
then
and so on, until zero is reached.
Fig. 3.4 High Gas / Get Out Timer
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