For calibrating platinum resistance with a dry block calibrator, it is important to select a suitable platinum resistance probe that matches the jack of the dry block calibrator. Different models of dry block calibrators may have different jack specifications. If the probe does not match the jack, it will affect the accuracy and stability of the measurement. When placing the platinum resistance in the dry block calibrator, handle it with care to avoid damaging the platinum resistance. Before calibration, it is necessary to check whether the appearance of the platinum resistance is damaged, such as whether the lead wire is broken. The temperature setting of the dry block calibrator should be accurate to avoid excessive temperature deviation. Moreover, it is necessary to ensure the cleanliness inside the dry block calibrator to prevent impurities from affecting the heat conduction of the platinum resistance. When reading data, wait for a sufficient length of time to ensure that the platinum resistance and the temperature of the dry block calibrator reach equilibrium, so that the obtained data is accurate and reliable.