Welcome to visit ATO.com
Tel: 800-585-1519 Email: [email protected] Web
Calibration
Note: Calibration needs to be done by professionals and with necessary accessories and standard gas.
Password is needed. (If you need password, please contact the manufacturer to get it)
In detection mode, long press the “UP” button, 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 mode, press the “UP” and “DOWN” 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 standard gas, press ON/OFF
button to enter.
There will show “please input standard gas” at the top of the LCD, and at the bottom there are “gas type”,
calibrate value, “VA” (current concentration), “AD”, and “ESC or SET”. Change the target concentration to the
standard gas concentration by press “UP” and “DOWN”, after the value 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 tube.
2. Enter the standard gas calibration interface.
3. Change the target point value to the standard gas value.
4. Release the standard gas to the detector in a flow rate of 400mL/min.
The value of “current concentration” will become larger gradually, and
become stable after about 30 seconds.
5. When the value of VA and AD is stable, the value of “current
concentration” will be same with or almost same with the “target point
value”. Press the “UP/DOWN” button to change the “SET” to
“CONFIRM”, and press the “ON/OFF” button, the calibration is
finished.
6. Cut off the standard gas supply.
4
