Section 3: Measuring 4-wire resistance with offset compensation
Model DMM7510 7½ Digit Multimeter Application Manual
3-6
DMM7510-904-01 Rev. D March 2021
Send the following commands for this example application:
-- Reset the Model DMM7510 to the default settings.
reset()
-- Set the measure function to 4-wire resistance.
dmm.measure.func = dmm.FUNC_4W_RESISTANCE
-- Enable autorange.
dmm.measure.autorange = dmm.ON
-- Enable autozero.
dmm.measure.autozero.enable = dmm.ON
-- Enable offset compensation.
dmm.measure.offsetcompensation.enable = dmm.ON
-- Set the number of power line cycles to 1.
dmm.measure.nplc = 1
-- Read the resistance value.
print(dmm.measure.read())
Test results
The results of a low-resistance measurement test using a 20
Ω resistor are shown in the table below.
For example, if the resistor specification has a tolerance of ±0.1 percent and a temperature coefficient
of ±15 ppm per °C, a compliant resistor measures between 19.97
Ω and 20.03 Ω
Offset compensation
Resistance
OFF
0.020035852875 kΩ
ON
0.019991329184 kΩ
