Electrical calibration refers to the process of verifying the performance of electrical parameter measurement or testing instruments or adjusting these instruments. This field usually refers to DC and low-frequency electrical metrology. The main parameters include voltage, current, resistance, inductance, capacitance, time and frequency, and other parameters related to electrical power and phase are also within this range.

The load for DC and low-frequency metering calibration can cover many instruments and meters, such as digital multimeter, analog meter, desktop or handheld instrument, oscilloscope, and oscilloscope ®， Power meters and energy meters, platinum resistance RTDs and thermocouple thermometers, process instruments, data recorders, curve and graph recorders, etc.