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record to the second in turn. If the record number is above 10, and you want to check the specific number,
you press the MENU again, then you can input the exact number and check that record(press the MENU to
move the cursor, and press the MINUS and PLUS to change the number), press ON/OFF to confirm and
then you will see the detailed record.
In the middle are the date and time, and the detailed concentration is at the bottom.
3. DEL: Delete record data. To make sure the detector work perfectly and you can check the history data
quickly, we suggest you to erase the history data regularly. Change the “NO” to “YES”, then press the
ON/OFF to confirm, then all the record will be deleted.
Calibration
Note: Calibration needs to be done by professionals and with necessary accessories and standard gas.
Press MENU, choose the CALIBRATION. There are three 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 “PLUS” and “MINUS” buttons at the same time 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 left side is current concentration of the gas, the value at the 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.
