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Press MENU, choose the CALIBRATION. There are five options in the calibration interface:
1. Channel option: you need to choose the right channel/gas type before calibration, there will be 4 channels
for the 4 gases multi gas detector.
2. Zero calibration option: put the detector in clean air for 3-5 min, then press
”ON/OFF” button, wait for the
value become stable, press
”ON/OFF” again, the zero calibration is finished. You can also do the zero
calibration in the detection interface, press the
“MINUS” buttons for three seconds, the data of all channels
will reset to zero automatically.
3. Target point calibration:
Prepare the standard gas before starting the target point calibration. Choose the target point calibration, press
ON/OFF button to enter. Then you will need to enter password. (If you need password, please contact the
manufacturer to get it)
After entering the password successfully, press ON/OFF to enter the target point calibration interface. The
value at the lower left side is current concentration of the gas, the value at the lower right side is the AD value.
Change the target concentration to the standard gas concentration, after the value on the left side and right
side is stable, press the
“ON/OFF”, to finish the calibration.
The detailed process is as below:
1. Connect the detector with standard gas cylinder by hose.
2. Enter the target point calibration interface, enter password correctly,
3. Change the target point value to the standard gas value.
4. Release the standard gas to the detector in a flow rate of 700mL/min.
The value of
“current concentration” will become larger gradually, and
become stable after 30seconds.
5. When the value of
“concentration” is stable, press the “ON/OFF”
button, the value of
“current concentration” will be same with or almost
same with the
“target point value”. The calibration is finished.
6. Cut off the standard gas supply. Press
“ESC” to go back to detection
interface.
