System calibration of TBX-1303 tied to SCXI-1001 Chasis

I'm wanting to calibrate the complete NI system back to the computer by inputing an equivalent temperature  millivolt signal thru an ice bath into a TBX-1303 thermocouple card that's tied to a SCXI-1001 chasis. Do the 32 channels on this TBX-1303 card get multiplexed through one D/A or is there one D/A for each channel? I want to know if I can calibrate through one channel or do I need to check each individual channel?
Thanks for your help.
Mike Stair

Mike,
The SCXI chassis and modules do not have an ADC (analog-digital converter) chip.  The purpose of SCXI is to condition signals being measured from a sensor (TCs in your case).  The module and terminal block do all the necessary conditioning like filtering and amplification, and the SCXI chassis backplane routes the clean signal back to some type of data acquisition card; this card has the ADC chip on it.  Typically this card has a multiplexer design.  So you would need to calibrate each channel on the SCXI module and terminal block.
Wayne T. | Application Engineer | National Instruments

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