What Is Remote Sensing and Does My PXI-4110 DC Power Supply Support It? Hardware: Modular Instruments>>Power Supplies>>PXI-4110
Problem: I was reading the DC Power Supplies Help to find out how to compensate for current-resistance loss introduced by the cabling wires that connect the power supply to the load terminals. It recommends to use 4-wire remote sensing if available. What is remote sensing and is it available for the PXI-4110? Solution: Remote sensing is the ability to measure voltage directly at the DUT, thereby eliminating the measurement error introduced by lead resistance. Since the remote sense terminals have high input impedance, a negligible amount of loss occurs due to lead resistance and the load voltage can be monitored accurately. As shown in the figure below, two leads (V+ and V-) are used to supply voltage and current to the load. A third and fourth lead connect to high-impedance remote sensing terminals (RS+ and RS-) to measure the voltage at the load. The measured voltage at the load can be compared to the desired value and the power supply voltage can be raised or lowered accordingly to ensure that the load receives the correct voltage.
Related Links: Product Manuals: NI DC Power Supplies Help NI PXI-4110: Triple-Output Programmable DC Power Supply NI PXI-4070 FlexDMM: 6½-Digit PXI Digital Multimeter (DMM) and 300 V Digitizer NI PXI-4130: PXI Source Measure Unit (SMU) Attachments: 
Report Date: 08/28/2006 Last Updated: 03/21/2008 Document ID: 40REIRAY |
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