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５−４．Explanation of performance (Detection mode)
５−４−１．Display action
There are following two kinds of displays.
(1)LED display ：Shows gas concentrations.
(2)LED light
：Shows power/trouble (PW/TR), 1st gas alarm (AL1), 2nd gas alarm (AL2) and maintenance
(SKIP) condition.
* Contents of indications by LED display and LED light are different from the condition of the unit.
Preparation
Power ON
Action of LED light
□：Light off ■：Light on ◎：Flashing
Initial clear (Approx 25 sec.)
Detection mode
Only PW/TR light illuminates at detection
mode and LED display shows detected
gas concentration.
Gas alarm condition
When detect gas above AL1, AL2, it
shows gas concentrations and AL1,
AL2 alarm lights flash.
PW/TR AL2
■ □
SKIP AL1
□ □
PW/TR AL2
■ □
SKIP AL1
□ □
PW/TR AL2
■ □
SKIP AL1
□ ◎
