Calibration Menu / 7.1/7.2 - NTC Calibration
NTC sensors may not be 100% accurate from the factory; in this section of the menu, it is possible to calibrate their parameters for the most accurate measurement results possible.
Calibration to absolutely precise values is possible only if an accurate and calibrated thermometer is available, with which the values measured by the NTC sensors could be compared, which is very rare.
However, this is not necessary nor a requirement for the proper use of MiniHPC.
It is important, however, that the difference between the NTC sensors T2, T3, and possibly T4 is as small as possible. This is because the measurement of output and consequently the COP uses a calorimetric equation, meaning that the resulting output is the product of the heating water flow and the temperature difference between T3 and T2.
Calibration
To calibrate the T2, T3, and T4 NTC sensors to the same temperature, it is necessary to run the circulation pump without any heat source through the heat exchanger and electric supplementary heating.
Make sure that no heating source remains active for at least one hour; that is, on the main menu page, turn off heating/cooling and also disable DHW heating in the menu 3.1 DHW temperatures.
After at least one hour of the circulation pump operating, the temperatures on sensors T2–T4 should stabilize, and then in this configuration menu in the first row , where the temperatures are displayed, adjust these values so that they match as closely as possible.