Remove Resistance, Current, and Frequency Measurement Errors in DMMs
White Papers
Introduction
When you make measurements with a digital multimeter (DMM), common errors will occur. This white paper covers the types of measurement errors for resistance, DC and AC currents, including frequency and period. You will learn how to eliminate potential measurement errors to achieve the highest accuracy with a DMM.
Key factors causing resistance measurement errors with a DMM:
- Long leads create a voltage drop across the leads.
- Lower DMM resistance range generates higher test current, which may affect sensitive DUT with a large temperature coefficient.
- Large resistance range changes require proper measurement settling delays.
- Current leakages on test leads and fixtures affect high resistance measurements.