In case 1st alarm is raised and power key is pressed by a worker or operator who perceived the
status of 1st alarm, the alarm sound only shall be stopped but the device shall still remain in
operation state. When 2nd alarm is raised, the workers should quickly escape from the work
site to safe region. Termination of alarm in this case is possible only by turning power key Off
at a place where gas concentration indicates normal value (Alarm shall be continuously raised
unless the power key is turned off at an area of normal concentration value). The alarm sound
of 1st battery is same as that of the 1st alarm and, when power key is pressed, the alarm and
vibration only shall be ceased but icons shall be kept blinking.
The alarm sound of 2nd battery is same as that of 2nd alarm and the blink of icons can not be
deleted by the users. The alarm and power shall be off 10 seconds after the raise of alarm. In
case of failure of test and calibration,
icons shall blink with alarm sound.
Gas
Combustible gas
Hydrogen
1
st
20%
100 ppm
2
nd
40%
500 ppm
Alarm Set Point
Alarm Set Up
When power key and buzzer key is pressed for 3 seconds under the state of power OFF,
icons shall appear blinking on LCD and indicates LO. Press power key one more
time under this state to enter into alarm set up mode. When power key is pressed at this
point, system shall be entering into the 1st alarm change mode and, when buzzer key is
pressed, HI shall be displayed on the monitor and then moves to the 2nd alarm set up mode.
In order to return to Gas Measure Mode without changing alarm set value, use buzzer key to
move.
Hold 3 sec.
10
