5
below,
After preheat, it will enter working mode directly.
Remark: If the self-checking is failed, the device needs to repeat the self-
checking. If failed again, please contact the distributor or manufacturer.
3.3
Working Mode
The gas detector is diffusion sampling. When operating, it is able to be carried in
hand or hung on waist belt. After power on, it will enter working mode to
measure the gas concentration diffused into gas sensor. Usually, the targeting gas
will be taken into gas sensor by the air flow. When the sensor contact the gas, it
will response and display measurement value. If user needs to remotely measure
the gas concentration, suction sampling is available with an external pump.
3.3.1
Gas Alarm
There is preset two-grade alarm in the gas detector, Grade-
Ⅰ
alarm value (for
combustible gas & toxic gas it is low alarm, for oxygen it is high alarm) and
Grade –
Ⅱ
alarm value (for combustible gas & toxic gas it is high alarm, for
oxygen it is low alarm). User can set and adjust the alarm value freely.
Remark: For all gas types, except oxygen, the Grade-II alarm value is higher
than Grade-I alarm value.
