User Manual

10
CALIBRATION
Step 1. Power the unit on by pressing and holding the power button for 3 seconds
Step 2. Press and hold the ºF/ºC button for 5-10 seconds to open the first menu
Step 3. Use the ºF/ºC button to scroll through the first menu which will read:
a) AIR (Ambient Air Calibration Option)
b) N2 (Zero Nitrogen Calibration Option)
c) L 0.5 (Low alarm threshold)
d) H 3.0 (High alarm threshold)
e) A ON (Alarm option. Turns the alarm on and off)
f) E (To exit the menu and return to home screen)
Step 4. Perform AIR or N2 calibration
“AIR” Ambient air calibration
• Follow above instructions to
access the menu
• The “AIR” option is the first to
appear
• Bring the unit OUTSIDE or use
400ppm C
O2
• Press the power button to start
the c
alibration
• If the screen reads “FAIL” repeat
unti
l the calibration passes
*IF THE MONITOR DOES NOT READ IN
THE 300-600 PPM RANGE BEFORE
PERFORMING THE CALIBRATION, IT
WILL NOT CALIBRATE IN THE FIRST
MENU.
“N2” Nitrogen calibration
• Follow above instructions to
access the menu
• Go to “N2” opt
ion
• Expose the device to nitrogen gas
• Press the power button to start
the c
alibration
• If the screen reads “FAIL”
repeat
until the calibration
passes
*IF THE MONITOR DOES NOT READ
IN THE 0-200 PPM RANGE IT WILL
NOT CALIBRATE IN THE FIRST
MENU.
Step 5. (USE ONLY IF THE DEVICE IS NOT IN RANGE AND FAILED TO CALIBRATE IN
THE FIRST MENU)
To open the second menu press and hold the ºF/ºC button while already in the first menu.
Step 6. This menu will allow you to calibrate without range limitations. The second menu will
read:
o -AIR (Ambient Air Calibration Option without limits)
o -N2 (Zero Nitrogen Calibration Option without limits)
o E (To exi
t the menu and return to home screen)
Step 7. When calibration is complete make sure the unit is reading within the span
values. You can test with fresh air which should read about 400ppm CO2.
© Copyright 2021, CO2Meter, Inc. All Rights Reserved. Last modified June 18, 2021