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If possible, calibrate and adjust the probe at a temperature of 18 to 25°C. During calibration and adjustment avoid soaking the probe at high humidity (60%RH and above) for periods of time in excess of 30 minutes.

 

Use of a humidity generator is probably the fastest method for calibrating and adjusting humidity at several values. When using a humidity generator to calibrate or adjust a probe, make sure that the probe is as fully immersed in the generator as possible to minimize the effect of room temperature on the humidity sensor. In general it is good practice to qualify from time to time a humidity generator both for temperature and humidity gradients.

 

When you do not have access to a humidity generator, Rotronic provides easy-to-use, certified humidity standards. When calibrating or adjusting a probe against a Rotronic humidity standard do not place the probe close to an air vent or a heater and do not directly expose the probe to sun rays. Room temperature should be stable to ± 0.25°C or better during the period of time required for each calibration point.