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time the buzzer emits “beep,beep,… every 0.25s” . the red
indicator light flashes synchronously, and the color of the gas
concentration value changes to red on the screen. The backlight
and the vibrator also open at the same time, indicating the high
alarm; long press the button to release the audible alarm. but
there is still an alarm message. The buzzer will resume ringing
until the new alarm is triggered, and the alarm light and vibrator
will resume operation. When the gas concentration value detected
by the detector returns below the low alarm value, the gas
concentration value turns green and the alarm signal is
automatically released. When the alarming, the detector is shown
in Figure 5.
4.3.4 When the detected gas concentration is higher than the test
range, the buzzer of the detector will beep normally, the LCD
screen will be on constantly, the vibrator will be normally open, and
“HHHH” will be displayed on the screen, indicating over-range. at
that time, you can press the button to release the audible
alarm.
4.3.5 Display time, gas sampling pump flag , buzzer indication
(signal when no mute is , when mute is ), the
corresponding concentration information display of different gas
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