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Voltage signal (-0.40mV ~ 7.60 mV) to NI card and LV

Discussion in 'Electronic Basics' started by Lathe_Biosas, Oct 2, 2005.

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  1. Lathe_Biosas

    Lathe_Biosas Guest

    Hi

    I'm trying to plot a voltage signal (-0.40 mV ~ 7.60 mV) on LabView
    unfortunatelly I haven't achieved reading the signal with mV
    resolution, my conclusion is that the signal needs to be amplified.

    Could anyone please tell me if amplifing the signal would help? If yes
    how can it be amplified?

    I have an Analog Devices AD595 (Monolithic Thermocouple Amplifier)

    http://www.analog.com/UploadedFiles/Data_Sheets/421725987AD594_5_c.pdf

    and I was wondering if it would help

    Any help or hints would be kindly appreciated
    Best Regards
     
  2. Bob Masta

    Bob Masta Guest

    What is the stated sensitivity of the data acquisition board
    you are using with Labview? How many bits of resolution?
    Many boards have selectable sensitivity ranges, so you
    should definitely check into that before adding anything
    external. If you do need an external amp, be aware that
    thermocouple amps may include cold-junction compensation
    that will add a temperature drift to your data. (Don't know
    about the part you mentioned).

    Best regards,


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Home of DaqGen, the FREEWARE signal generator
     
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