National Instruments NI 6013 User Manual

Also see for NI 6013: Note to Users

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National Instruments NI 6013 User Manual Manual pdf 35 page image

Chapter 4 Connecting Signals© National Instruments Corporation 4-9 NI 6013/6014 User Manualsetting of the amplifier. The amplifier output voltage is referenced to thedevice ground. The device ADC measures this output voltage when itperforms A/D conversions.Connecting Analog Input SignalsThe following sections discuss the use of single-ended and differentialmeasurements and make recommendations for measuring both floatingand ground-referenced signal sources.Figure 4-3 summarizes the recommended input configuration for bothtypes of signal sources.Figure 4-3. Summary of AI ConnectionsInputInputFloating Signal Source(Not Connected to Building Ground) Grounded Signal SourceDifferential(DIFF)Single-Ended —Nonreferenced(NRSE)Examples• Ungrounded Thermocouples• Signal Conditioning withIsolated Outputs• Battery DevicesExample• Plug-in Instruments with NonisolatedOutputs+–+–V1ACHAISENSEAIGND+–+–V1ACH(+)ACH(–)AIGND+–+–V1ACH(+)ACH(–)AIGNDRSee text for information on bias resistors.+–+–V1ACHAISENSEAIGNDR