again.
5
）
If the testing result is lower than the preset alarming level, the
indication LED is green;
If the testing result reach or exceed the preset level, the indication LED
is red, meantime the buzzer will send out rapid alarming sound.
6
）
In the testing result indication interface, press
button to take
next test.
Passive test
：
The passive testing will be carried if the testee do not assort to test,
or he is too drunk to take testing.
When the LCD screen shows “ ”
icon, take off the mouthpiece and put the tester close to the
testee’s nares, then press
button to take tests, few seconds
later, the screen will show the result.
If long time no operation, the tester will turn off the backup
light or turn off the tester automatically.
4.2. Check the history records
In tester turning on status, press
button to check the history
records, press
button to return to warm-up counting down status.
The 1
st
record is the latest testing result. It can store max 10 records.