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SCXI 1100 MultiChannel Problem

Unsure if my problem is a hardware or S/W problem or setting:

Configuration: Labview 7.0, MAX (unsure), SCXI 1100 (three modules), SCXI 1303, 6034E DAQ card.

The problem: 10 kHz hardware/SW filter: mulitple channels (~4) are posssible with huge standard deviation. For 4 Hz hardware/SW filter: multiple channels possible with excellent signal to noise, but there is interference in the chanels. For example: if I have three thermocouples, if I increase the temperature in one, all three increase at the same time.

Troubleshooting: It wasn't module depenant - changed between all three modules and the same trend occurs. Changed all MAX and DAQ assitant settings correctly. Reset PC to ensure valid test point.

By my calcuation: a 200 kS/sec card should produce at least 1000 samples per second if I used all the 96 Channels in the SCXI 1100 with Windows taking about half of the original card potential.

Appreciate any help,

Zubes
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Hi Zubes,

Look Carefully at the data sheet of the SCXI-1100:
"SCXI-1100
• 240 kS/s at full bandwidth, with gain up to 100
• 6.6 kS/s maximum10 kHz filter
• 3 S/s maximum 4 Hz filter"

http://www.ni.com/pdf/products/us/4scxisc278_ETC_196.pdf

Hope it Helps...

The Bush-Man
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