The calibration or adjustment of the electrical parameters of these instruments refers to the process of electrical test or measurement. This field usually refers to DC and low-frequency electrical measurement. The main parameters include voltage, current, resistance, inductance, capacitance, time and frequency, and other parameters related to electric power and phase are also in this range.
The load of DC and low-frequency measurement and calibration can cover many instruments, such as digital multimeter, analog meter, desktop or handheld instrument, oscilloscope and oscillograph ®, Power meter and electric energy meter, platinum resistance RTD and thermocouple thermometer, process instrument, data recorder, curve and graph recorder, etc.