Range in MAX compared to range on DAQ card?

[ldrummon]

I am using an 1104C SCXI card reading into a 6052E series DAQ card. When I configure my virtual channels in MAX, how does that range map over onto the card's range? If I set from say 0-8V does the card see it as 0-10V? I am wondering what kind of accuracy issues I may be dealing with here. I cannot find in the manual where the ranges are defined or set on the card.

[mhaag]

The input range that the DAQ card uses is based on the range that you specify in MAX for the virtual channels. MAX uses the actual specified range to apply a set gain to the inputs so that it best fills one of the available range configurations on the card.

If you refer to the user manual or specifications for the 6052E, then you will see that the card can have a range of 0 to 10V and -5 to 5V. Your signal can then have a gain of 1, 2, 5, 10, 20, 50, or 100 applied to it to best fill one of the two ranges above. The gain chosen is based on that input range that you specify in MAX.

Please refer to the following manual and on page 3-4 you will find a table listing the ranges and gains along with the corresponding precision of your device.

http://digital.ni.
com/manuals.nsf/websearch/4BF830B584C7AC8A86256C5D005C02FF?OpenDocument&node=132100_US

The following links also provide some useful information:

http://digital.ni.com/public.nsf/websearch/CBA83550AB782D1C862566210061BEB9?OpenDocument

http://digital.ni.com/public.nsf/websearch/DD2B6FF2BFFF216C86256E23007A2532?OpenDocument

I hope this answers your question, and if you have any other questions or comments then please let us know.

Regards,
Michael H
Applications Engineer
National Instruments