4.Measurement Tutorial
4. Measurement Tutorial
Loading Errors (DC Voltage)
Measurement loading errors occur when the resistance of the DUT(Device-Under-Test) is
an appreciable percentage of the multimeter's input resistance, as shown below.
V
s
= ideal DUT voltage
R
s
= DUT source resistance
R
i
= multimeter input resistance
Error
For the mV range,input impedance≥ 5 MΩ.For other range, input impedance≥10 MΩ.
33