New Cosmos Electric KS-7D, Instruction Manual

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7-3-3. Full Scale and Alarm Set Values Display
▪
Press the RESET button (one beep) to display the
“full scale concentration”, “1st stage alarm set
value
”, and “2nd stage alarm set value” in sequence.
7-3-4. Peak Value Display and Reset
▪
Press the
▲
button. (one beep) The
“peak value after powering-up” and “PEAK” will be displayed
alternately.
▪
To return to the normal gas concentration display, press the RESET button. (one beep)
The display will show the full scale value and alarm set value, then return to the normal gas
concentration display.
▪
To reset the peak value, press the ▲/▼ button at the same time. (two beeps)
The peak value is reset then the display returns to the normal gas concentration display.
7-3-5. Operation during Gas Alarm
▪
When the CO concentration reaches the alarm set value, the alarm light flashes, the status
indicator sequentially-flashes and an audio alarm sounds.
▪
There are two options to clear a gas alarm, manual-resetting and self-resetting. By default, the
detector is set to manual-resetting mode. Please specify the alarm clearance option at the time of
order.
▪
The alarm hysteresis range is 2ppm. The alarm will not be cleared until the gas concentration
exceeds the alarm set value by more than the hysteresis value. E.g. when the alarm set value is
50ppm and an alarm is activated, the alarm will not be cleared until the concentration reaches
47ppm or lower.
Alarm relay contact reset : If the RESET button is pressed while the
concentration is below the alarm set value, the alarm relay contact will return to
its normal position and the alarm light will turn off.
NOTE
Audio alarm mute : If the RESET button is pressed during a gas alarm, the audio
alarm will be muted and the flashing alarm light(s) will become solid. If the
RESET button is pressed and held, the alarm will not be muted.
NOTE
Full scale: 400ppm 1
st
stage alarm set value: 50ppm 2
nd
stage alarm set value: 150ppm
(Ex. Peak value is 25ppm)