Instructions
Table Of Contents
- Model DMM6500 6½-Digit Multimeter User's Manual
- 1 Introduction
- 2 Front-panel overview
- 3 Using a remote interface
- 4 Making basic front-panel measurements
- 5 Measuring DC voltage with high accuracy
- 6 Measuring 4-wire resistance with offset compensation
- 7 Scanning temperature at a set time interval
- 8 Grading and binning resistors
- 9 Measuring power using digitizing and TSP-Link
- 10 Troubleshooting FAQs
- About this section
- Where can I find updated drivers?
- Is there any software to help me get started?
- Why did my settings change?
- Why can't the DMM6500 read my USB flash drive?
- How do I upgrade the firmware?
- How do I change the command set?
- How do I save the present state of the instrument?
- How do I save what is displayed on the screen?
- What is the ethernet port number?
- 11 Next steps
- Contact information
Section
6: Measuring 4-wire resistance with offset compensation Model DMM6500 6½ Digit Multimeter
User's Manual
6-6 DMM6500-900-01 Rev. B / August 2019
Send the following commands for this example application:
-- Reset the Model DMM6500 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% 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
19.992460878
On
19.991394395
Figure 37: 4-wire resistance test results