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Humidity Calibration

The instrument can be calibrated either with a 35 % or 80 % salt solution. It is recommended that the ambient conditions are at 25 °C.

 

WARNING: Do not calibrate the humidity without the standard calibration salt because otherwise serious damage could result. For the calibration salt or other services, contact Rotronic. The one-point adjustment can cause the error code E11 or an inaccurate measurement. Always perform a two-point adjustment to end the procedure. First calibrate a low humidity.

 

 

Calibration with salt solutions

Place the probe in a 35 % salt solution with the instrument on. Press and hold “SET“ + “START“ + “DOWN“ simultaneously for 3 seconds to enter calibration mode. Press “UP“ or “DOWN“ to select a 35.0 % calibration and press “ENTER“ to start the calibration. “Calibration value“ (35.2 % at 25 °C) lights up on the LCD display. Wait 60 minutes until the 35 % calibration is finished. For immediate saving, press “ENTER“ at any time. The 80 % calibration is carried out as soon as the 35 % calibration has been finished. Press “ENTER“ within 20 minutes to start the 80 % calibration. “Calibration value“ lights up on the LCD display. Wait 60 minutes until the 80 % calibration is finished. For quick saving, press “ENTER“ at any time. The instrument is now correctly calibrated. Press “ESC“ to cancel calibration without saving.

 

 

CO2 Calibration

The factory defaults of the instrument are calibrated at a CO2 content of 400 ppm. We recommend that you carry out manual calibration regularly to ensure accuracy. The instrument can be calibrated at a CO2 content of 400 ppm. Calibration should be performed in the open air on a sunny day. Press and hold “SET“+“START“+“DOWN“ simultaneously for 3 seconds to enter calibration mode. Press “UP“ or “DOWN“ to select a 400 ppm CO2 calibration. Press “ENTER“ to start the calibration.

The CO2 value flashes on the LCD display. Wait about 10 minutes until the values stop flashing. Calibration is then finished.

Press “ESC“ to cancel calibration without saving.

 

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..