Your Gazeeka instrument has a Calibration Check Module “CCM” in the “Passive” antenna (the one without the electronics in it on the right-hand side of the hay baler). The combination of doing a normal air reading and then a CCM check will check that the microwave module is reading the microwaves correctly at both the very dry hay region and the very wet hay region.

For greater detail on this topic, please refer to the Gazeeka Owner’s Manual.