A generic DMM test and calibration strategy

The digital multimeter (DMM) is one of the most widely used electrical measurement instruments and provides electrical traceability to many industrial users. However, it is the nature of measurement products that they require regular checks to ensure that they operate not only in a functional sense, but also within their specifications. Such regular checks are known as calibrations and require a certain amount of knowledge of DMM technology in order to calibrate them effectively. This paper seeks to identify the important functional and calibration parameters and to offer a generic guidance strategy for their routine verification