Why is the Ref Junction set automatically when I select a Thermocouple in Sensor Type?
Thermocouples do not measure absolute temperature, they only measure the temperature difference between the sensing end (the probe tip) and the reference end (where the probe plugs into the logger). To acquire the absolute temperature the logger adds together the temperature difference measured by the thermocouple to the temperature at the reference junction. The reference junction temperature is measured by the Reference Junction channel. To save the user from having to remember to turn on the Reference Junction channel, SquirrelView and the logger do it automatically whenever a thermocouple channel is selected.
