Can the Rdc measurement function of the 4287A be used instead of a digital multimeter to measure the DC resistance of an inductor?

No, it is not recommended to use the Rdc measurement function instead of a multimeter. Since the Rdc measurements in two-terminal configuration cannot eliminate the effects of variance in residual resistance and contact resistance, measurement accuracy is not as good as it satisfies the DC resistance measurement requirements of inductors. The Rdc measurement function is provided for contact check. For more details of Rdc measurement accuracy, refer to the FAQ titled " Is the Rdc measurement accuracy of the 4287A better than that of the 4286A? "