Internal temperature check

The AtmosVue 40 has an internal temperature sensor in one of the crossarms. This is used as part of the present weather identification if a AtmosVue-HV temperature and RH sensor is not connected. This does not need recalibration, but it can be checked if a suitable nearby reference temperature measurement is available. The AtmosVue 40 external temperature provided in the output message (see Messages) should be within about 3 °C of the reference. Ideally, compare the temperatures in cloudy and windy conditions when the air temperature is as close to 0 °C as possible.