4. The result of self-checking will be displayed as follows:
In addition, the detector will check the battery, electric circuit and the sensor(s) regularly.
！
Notice:
at failure of self-checking, a re-selfcheck should be taken, if it fails again, please
contact us or the local agent for service
3.3 Measuring mode
A measuring mode of "Gas diffusion” or “Gas absorption" can be applied to the detector
which can be fixed to the waist belt or handled for use during normal operation. Once
switched on, the detector will start measuring continuously, and generally the surrounding
air can enter into the sensor through diffusion which will bring the target gas directly into
the sensor, and then the sensor will response to the concentration of the gas and output a
measuring result. The detection principle of diffusion mode applies the above way to
detecting the concentration of the surrounding gas with an advantage of swift response
time. If it is required to take a remote detection for the gas at the sample position, gas
absorption mode should be applied to measuring, and the detector should be equipped
with a calibrating case and an optional air pump, but at such situation, the direction for gas
sampling should be in accordance with the arrowhead. The gas kind and concentration will
be separately displayed on a same screen.
3.3.1 Gas alarm
The detector has two instantaneous gas alarm grades, in which Grade II alarm point
(high concentration alarm for combustible gas and noxious gas, low concentration alarm
for O
2
) should be more urgently treated than Grade I alarm point (low concentration alarm
Selfcheck Pass
Selfcheck Failure
Normal Display
