Humidity Calibration
This meter can be calibrated either via 35 % rH & via 80 % rH humidity standards. The ambient condition is recommended as stable 25 °C.
Caution: Do not calibrate the humidity without the default humidity standards. Otherwise, it will cause permanent damage. Contact Rotronic for humidity standards or services. Single point calibration will cause error code E11 or non accurate reading. Always do dual point calibration to complete a process. Suggest starting calibration from low humidity.
Pull out the humidity probe from panel
Before calibration, pull out the humidity probe from cover in panel rear side.
Calibration with salt solutions
Power on the device, plug the sensor probe into 35% humidity standard. Press “SET” +”START”+”DOWN” keys simultaneously for 3 seconds to enter calibration mode. Press “UP” or “DOWN” key to select 350 (35.0% calibration) and press “SET” to start. “Calibrating value” (35.2% if at 25°C) is blinking on the LCD.
Waiting for 60 minutes to complete the 35% calibration. To quickly save, press “SET” key any time. 800 (80.0% calibration) comes right after 35% calibration is done. Within 20 minutes, press “SET” key to start 80.0% calibration. “calibrating value” are blinking on the LCD. Waiting for 60 minutes to complete the 80% calibration. To quickly save, press “SET” key any time. Now, the device is well calibrated. To abort without saving, press “ESC” to quit without saving.
CO2 Calibration
The meter can be calibrated in fresh outdoor air (on sunny day) at 400 ppm CO2. Besides the 400 ppm, the meter can also be calibrated at 0 ppm or any value under 990 ppm. The latest
calibration point is treated as final and meter will ignore the previous calibration data.
Press “SET” +”START”+”DOWN” keys simultaneously for 3 seconds to enter calibration mode. Press “UP” or “DOWN” key to select 400 (400 ppm) or 0 (0 ppm) CO2 calibration. 0 ppm function is only for 0ppm CO2 calibration. For other CO2 value, please choose 400 ppm and press “SET” to enter. Once choosing the calibration value, press SET to start and see “CAL” and CO2 value blink on LCD.
Wait about 10 minutes until the blinking stops to indicate the calibration is completed. To abort calibration without saving, press “ESC” at any time.
WARNING: Do not calibrate the instrument in an environment with unknown CO2 content because otherwise, it will be wrongly calibrated and leads to inaccurate measurements..