User Manual-
GD200
Thanks for purchasing our product. Please read the user manual carefully before using.
Keys Operation:
Turn on/off: long press for 3s to turn on/off the device, short press to confirm or save data.
Menu: in detection mode, press this button to enter into parameter setting mode, and in parameter setting
mode, press this button to move the cursor.
Plus: in parameter setting mode, short press it to select items upward or add value. Long press for 3 seconds
to turn on/off alarm function quickly.
Minus: in parameter setting mode, short press it to select items downward or decrease value. Long press
for 3 seconds to turn on/off air pump quickly.
Exit: in parameter setting mode, short press it to go back to previous menu. Long press to shift the gas
concentration unit quickly.
(Note: The long press function only work in detection mode. When you change or reset any data, please remember to
click
“ON/OFF” button to confirm and save the settings. Remember to turn on the pump when start the detection. Please
turn off the pump when there is no need to detect, which will be helpful for the service life of the pump)
Power On / Off
Put the detector in clean air, and press the “ON/OFF” for three seconds, the detector will be turned on and the pump
will start to work. The screen displays the following interface successively: Brand and Logo, main parameter
interface, initialing countdown. The countdown would be 60 or 120 seconds, which is to make sure that the sensors are
fully activated. After countdown, the device enter normal detection interface.
Take the detector out of the detected environment and wait for the data to get down to zero, then press the “ON/
OFF” to turn off the detector
Zero Calibration
Zero calibration must be done in clean air. Better to do once after alarming happens.
Press ”MENU” to enter parameter setting mode, select the "calibrate zero", and press “ON/OFF” to enter the mode.
Observe the value of “real time concentration”. If the reading is not zero and the drifting is too big when the reading is
stable, then it is necessary to conduct zero point calibration.
Press “ON/OFF”, the real-time concentration will go back to zero, and press ”ESC” to go back to detection mode,
gas concentration values also back to zero.
Note: Zero calibration of oxygen detector, nitrogen detector and carbon dioxide detector (target gases are
component of the air) can not be done in the air. Only the target point calibration (value of target point
concentration is the standard concentration values in the clean air) can be done.
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