Hanwei BX176, Руководство по эксплуатации

Страница: 15 / 24

BX176 portable single gas detector operation manual
12
smallest detecting concentration since power on
②
etc.
Note
：①
Only available in toxic gas detector.
②
Only available in Oxygen detector.
4.7 Automatic zero calibration
If the detector’s reading is not “0” in clean air, you can use
this below function to do zero calibration.
Under detecting mode, press and at the same time for
one second, the detector will show password input interface, input
the correct password and the detector will do zero calibration
automatically.
The detector will display below information in turn.
status Display content
Press and , the screen will display
asright picture information, after one second
it will go to next status.
The right interface means inputing password
is needed, the flashing bit value can be
changed by pressing or .
After enter the automatic zero calibration
interface, the screen will display as the right
interface, press to confirm proceeding
automatic zero calibration.
Note: the zero point calibration in Oxygen detector is in clean air,
thus the concentration is 20.9
％
VOL instead of “0”.
Warning : This operation must be done in clean air, otherwise the
detector’s accuracy maybe influenced.