Extech Instruments EA80

EA80-en-GB_v3.3 09/15
8
Calibration
CO2 Calibration
1. Press “
” to turn the meter on.
2. Place the probe in a known CO
2 reference for 10 minutes.
3. Press the “SET” button 5 times until “C-01” is displayed in the second display.
4. Press “►” or “◄” to select digits to adjust (flashing).
5. Press “▼” or “▲”to adjust the display to the reference value.
6. Press “” to store the value and exit the calibration mode.
Humidity Calibration
1. Press “
” to turn the meter on.
2. Place the probe in a known humidity reference for 60 minutes.
3. Press the “SET” button 6 times until “SET” and “CAL” are displayed on the LCD.
4. Press “▼” or “▲” to adjust the display to the reference value.
5. Press “” to store the value and exit the calibration mode.
Temperature Calibration
1. Press “
” to turn the meter on.
2. Place the probe in a known temperature reference for 60 minutes.
3. Press the “SET” button 7 times until “SET” and “CAL” are displayed on the LCD.
4. Press “▼” or “▲” to adjust the display to the reference value.
5. Press “” to store the value and exit the calibration mode.