The Hygro-i2 probe connects to the instrument with an interface cable to the bayonet connection on the CMEX5. For use with the CMEX2 and MRH3 there is a cable with a Din Connector available.
Allow the probe to reach temperature equilibrium before measuring relative humidity.
Check that readings do not drift by more than 1% RH over a 5 minute period.
The sensor in the Hygro-i2 probe may take longer to recover if exposed to readings above 93% and can be damaged by prolonged exposure to high humidity.