4-IN-1 GAS DETECTOR
11
①
Press ON/OFF key, and hold
3 seconds, the detector will
display all characters, then
warning light, buzz, vibration
go off subsequently once.
②
one second later, the
current version of the software
will be on display.
③
one second after, warning
level 1 will be displayed for 2
seconds.
④
2 seconds later, warning
level 2 will be display for
another 2 seconds.
⑥
2 seconds after, the STEL
will show for 2 seconds.