Keithley SourceMeter 2470, Руководство пользователя

Страница: 46 / 86

Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual
5-2 2470-900-01 Rev. A /
May
2019
Equipment required
•
One 2470 High Voltage SourceMeter Instrument
•
Two TRX-1100V- X 3-Slot High-Voltage Low-Noise Triaxial Cables (available from Keithley
Instruments)
•
One high-voltage capacitor for the leakage current application
•
One coaxial cable or other device for the insulation resistance application
•
One ethernet, GPIB, or USB cable for the SCPI and TSP remote command examples
Set up remote communications
You can run this application from the front panel or any of the supported communication interfaces for
the instrument (GPIB, USB, or ethernet).
The following figure shows the rear-panel connection locations for the remote communication
interfaces. For additional information about setting up remote communications, see Remote
communications interfaces (on page 3-1).
Figure 20: Model 2470 remote interface connections
Device connections
Depending on the device under test (DUT), the current measurement is typically very small, usually
<10 nA. For any device, measuring leakage current and insulation resistance involves measuring very
small values. To get more accurate readings, connect the DUT to the 2470 rear panel with low-noise
triaxial cables.
Connect the DUT between the FORCE HI and FORCE LO terminals of the 2470.
The following figure shows schematic diagrams. One shows measuring the leakage current of a
capacitor. The other shows measuring the insulator resistance between two conductors of a
coaxial cable.