ATO -GAS-S4 User Manual

User Manual- ATO-GAS-S4
Thanks for purchasing our product. Please read the user manual carefully before using.

Keys Operation:

ON/OFF: long press for 3s to turn on/off the device. In detection mode, short press to check battery
power, and press again to go back to detection mode. In parameter setting mode, short press to
confirm or save settings.
UP: in detection mode, long press the UP button to enter into menu, and in parameter setting mode,
short press this button to move to upper item.
DOWN: in detection mode, long press to shift the gas concentration unit quickly, but it is restricted to
PPM and mg/m3. In parameter setting mode, short press it to go back to move to next item.
(Note: The long press function only work in detection interface. When you change or reset any data, please
remember to click "ON/OFF" button to confirm and save the settings)

Power On

Press the "ON/OFF" for three seconds, the detector will be turned on. The screen displays the following
interface successively: Brand and Logo, main parameter interface, initialing countdown. The countdown would
be 30~60 seconds, which is to make sure that the sensors are fully activated. After 30 seconds, the device
enter normal detection mode.

Zero Calibration

Zero calibration must be done in clean air. Zero calibration is needed when there is zero shift happens.
Put the detector in clean air for 3-5 minutes, under the detection mode, press the "UP" and "DOWN" buttons at
the same time for three seconds, the data of all channels will reset to zero automatically.
Note: Zero calibration of oxygen detector, nitrogen detector and carbon dioxide detector (target gases are
component of the air), the data will be defaults to 20.9%VOL (O2), 79.1%VOL (N2), 400ppm (CO2). Do not do
the zero calibration in not clean air or when there is no zero shift happens.
Welcome to visit ATO.com
Tel: 800-585-1519 Email: sales@ato.com Web：www.ato.com
www.ato.com
1