7½ Digit Multimeter User's Manual Section 6: Measuring 4-
wire resistance with offset compensation
DMM7510-900-01 Rev. C / September 2019 6-5
Using TSP commands
The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB).
TSB is a software tool that is available from tek.com/keithley
. You can install and use TSB to write
code and develop scripts for TSP-enabled instruments. Information about how to use TSB is in the
online help for TSB and in the “Introduction to TSP operation” section of the Model DMM7510
Reference Manual.
To use other programming environments, you may need to make changes to the example TSP code.
By default, the DMM7510 uses the SCPI command set. You must select the TSP command set
before sending TSP commands to the instrument.
To enable TSP commands:
1. Press the MENU key.
2. Under System, select Settings.
3. Set the Command Set to TSP.
4. At the prompt to reboot, select Yes.
In this example, the DMM7510 makes one resistance reading. After the code is executed, the data is
displayed in the Instrument Console of Test Script Builder.
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
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