Gas Detection (Australia) Pty Ltd Page 28 of 44
M-GDA-3000 Rev 1
11.4. How to use Calibration Mode
The gas detector must be allowed to stabilize prior to use. It requires at least 30 minutes
period after being powered up to reach stable condition due to its characteristics. However,
management standards may be changeable according to onsite condition.
11.4.1. Zero Calibration and Span Calibration
After password has been confirmed, the detector will go into
level1 mode.
Select CALIBRATION mode by touching “↑” or “↓” switch.
At this moment, if function key is touched, the detector will go
into submenu of programmable mode level2.
When [ZERO & SPAN] is displayed, if functinal key is touched,
the detector will go into ZERO & SPAN Calibration mode.
When [YES] is displayed by touching “↑” or “↓” switch, touch
FUNC switch and then zero calibration will be performed.
For doing zero calibration, insert clean air or 100% nitrogen for
one minute at the rate of 1000mL/min into sensors with using
calibration tool. Once it has stabilized, zero calibration can be
performed automatically by touching FUNC switch.
During performing zero calibration, the progress will be
displayed.
If zero calibration is completed to be successful, a message
“ZERO PROCESSING SUCCESS” will be displayed for two seconds
and then the mode will transit to CALIBRATION DATA mode.
If it fails, “ZERO PROCESSING FAIL” will be displayed for two
seconds and then the mode will change to CALIBRATION DATA
mode.
This mode is to display measured value after completing
calibration. This mode also enables the user to check if the
detector was calibrated properly or not.
If the detector enters submenu, it di
splays “WAIT” for two
seconds and then indicates current measurement state.
If RESET switch is touched, the detector will return back to
“CALIBRATION MODE”.
If FUNC switch is touched, it will go into Span Calibration menu.
