High Flammable Gas Over-Range Alarm - GMI V!SA Manual De Instrucciones

V!SA - USER HANDBOOK

3.3 HIGH FLAMMABLE GAS OVER-RANGE ALARM

Caution: Exposing the LEL sensor to
concentrations of flammable gas above 100% LEL
can damage the sensor.
In order to protect the user from danger in the event of the
flammable gas (LEL) sensor being over exposed to a high
concentration of flammable gas, the instrument has an
over-range alarm.
If the LEL sensor is exposed to a gas reading above
120% LEL, the displayed value will change to four (4)
rising arrows, the tone of the audible alarm will change,
and the visual alarm will flash quickly. The flashing
message 'DANGER OVER RANGE' is displayed, as shown
in Fig 3.3:
Fig. 3.3 Over Range Alarm
The instrument must be returned to a gas free area or
sample clean air. The instrument must now be switched
off.
Note: To avoid accidental switch-off in the dangerous
state, the off cycle is increased to 10 seconds.
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