SCXI Terminal Block Accuracy Specs

[VP]

I need to compute the accuracy of my measurements in the system consisting of 1) transducer, 2) SCXI terminal block, 3) SCXI input module and 4) DAQ board.
NI has published in its catalogs the accuracy tables for DAQ boards and SCXI input modules. What information is available for the accuracies of the terminal blocks? For example, what is the accuracy SCXI-1303 configured a) for thermocouple b) for voltage measurements?
Could the cable between DAQ board and SCXI chassis introduce an error? After all, it has some non-zero resistance.

[Bill B]

Hello,

Any error introduced by the SCXI terminal block and the shielded cable will be insignificant when compared with the uncertainty of the DAQ board and SCXI module.

That is why the accuracy specs for the terminal blocks and cables are not provided. Also, you would have to include the uncertainty components for the leads, wiring, and transducer if you wanted include the entire system. Adding these factors to you accuracy calculation would have no significant effect on the final calculation, because the errors of the SCXI module and DAQ board are so much greater than that of the copper used in the terminal blocks and cables.

Regards,
Bill B
Applications Engineer
National Instruments