Why Do I Get an Input Impedance of 750K Ohms When Calibrating a PXI-5112?Primary Software: Calibration ExecutivePrimary Software Version: 2.2 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: Modular Instruments>>High-Speed Digitizers (Scopes)>>PXI-5112
Problem: I am using a Datron/Wavetek 1281 (the 1281 is a 8.5 digit DMM) to measure the input impedance of a PXI-5112 with Calibration Executive. I expect to get an input impedance reading of 1MΩ on all ranges: 40V, 4V, and 0.4V. The problem is when I run the test, I get an input impedance of 1MΩ on the 40 V and 4 V ranges. However, I only get an input impedance of 750 kΩ on the 0.4V range. Solution: On the Datron 1281 instrument: select the 10 MΩ range rather than the 1 MΩ range for the 50 mV, 20 mV, 10 mV and 6.2 mV ranges. Related Links: Recommended hardware for Calibration Executive Calibration Solutions from National Instruments Attachments: [mark j, 08/02/04] Reassigning to Paul Mueller per request.
Report Date: 07/29/2004 Last Updated: 03/17/2006 Document ID: 3BS298HY |
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