6: Leakage current and insulation resistance Model 2450 SourceMeter® Instrument
6-10 2450-900-01 Rev. E / August 2019
Measuring insulation resistance
The following application demonstrates how to use the 2450 to measure insulator resistance. The
application shows how to use the front-panel interface, the remote interface using the SCPI command
set, and the remote interface using the Test Script Processor (TSP
®
) command set.
You typically make insulation resistance measurements between traces on a printed circuit board and
between conductors in cables and connectors.
This application sets the 2450 to source 20 V and makes 10 resistance readings with a 100 ms
interval time. Once the measurements are made, the output is turned off.
For this test, you will:
• Reset the instrument
• Set the instrument to read the rear terminals
• Select the source voltage function and measure resistance function
• Set the magnitude of the voltage source output
• Turn on autoranging
• Use the Simple Loop trigger model template to set the numbers of readings and interval time
• Make readings
Set up the insulation resistance application using the front panel
To set up the application from the front panel:
1. Connect the device under test (DUT) to the rear panel of the 2450, as described in
Device
connections (on page 6-2).
2. Reset the 2450.
a. Press the MENU key.
b. Under System, select Info/Manage.
c. Select System Reset, and then select OK.
3. Press the TERMINALS FRONT/REAR switch to set the instrument to use the rear-panel
terminals (R is displayed to the left of the switch).
4. Press the HOME key.
5. Press the FUNCTION key.
6. Under Source Voltage and Measure, select Resistance. An event message is displayed.
7. Select OK to clear the event message.
8. Select Source (at the bottom of the screen).
9. Enter 20 V (or other applicable test voltage) and select OK.
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