Gas Type
Fresh Air (O
₂
)
N
₂
CO
₂
Concentration
20.9%vol
99.99%vol
20,000ppm, 2%vol
Calibration Gas
1. In the measurement display, press and hold down the pushbutton and power button to
enter the setting mode.
2. Press the pushbutton until the CAL mode is displayed.
3. In the CAL mode, press the power button for 2 seconds to enter the mode
4.
In the arm’s length like the right image, hold the detector and for 2 seconds and press
the power button to perform the fresh air calibration.
5. Once the calibration is successful, the success message (
V
) mark is displayed. But, if
it fails, the FA message(
X
) mark is displayed.
6. After the successful calibration, the baseline is set to
400ppm(0.04%vol).
Fresh Air calibration
1
CAUTION
-
Initial calibration is performed on all devices prior to shipment.
-
The detector has fresh air calibration, N2 calibration and CO2 span calibration.
The sensor takes the last calibration, so if you have CO2 gas, we only recommend CO2 calibration.
If you don't have CO2 gas, N2 or fresh air calibration are also available for calibration.
- Check with your safety managers to ensure calibration accessibility.
-
Note that Fresh air calibration should be performed out of your office in a fresh air and in the arm’s
length to avoid the CO2 interference from breathing.
-
Before calibration, move to a fresh air, which is free of toxic and combustible gases.
-
If calibration fails, perform re-calibration again. If the repeated calibration continues to fail, contact
authorized safety managers or distributors.
-
The auto fresh air calibration can be set by the software manager.
Once activated, the fresh air calibration is activated every 3 days. (Refer to page.13)
4.2. Calibration
4. Setting Mode
CAUTION
-
The presence of CO
₂
in uncontaminated ambient air is around
400ppm (0.04%) and it exceeds over 1000ppm (0.1%) in any
enclosed environments such as offices, workplaces, room, etc.
as a result of respiration, heat from electronic devices and poorly
ventilation. Therefore, to do fresh air calibration, the calibration
must be in outdoor and well away from a building and the
breathing zone. Ensure to hold the detector in the arms’ length
like the right image.
10
