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AD590 and NI DAQ board

I have to measure an outdoor temperature with a AD590 and a USB-6008 National Instruments DAQ board.

The range that I expected to measure is [263K...313K] in other words [-10C..+40C].

I was thinking to send +5V provided from USB6008 to power AD590 (located at about 5 meters from DAQ board), then use an AI (configured as RSE, in order to minimize ground loop since AD590 is a NRSE source) with a 10k resistor (0,5%), connected from AI+ and GND input, so to have a conversion of 10mV/K.

Is it a good solution?

Then the voltage range should be 2.63V...3.13V.

What do you suggest at this point?

I was thinking a conditioning with an differential amplifier (Av=4.42) so to scale 2.63...3.23V to 0...5V and get a better resolution.

Or you suggest to connect simply the only resistor?

What do you suggest? Any hint/suggestions is really welcomed.

Reply to
ZeroDue
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It may be worth your while to post this query on one of the NI discussion groups at

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There are many posters there with considerable experience of NI equipment, and of data acquisition in general.

Aidan Grey

Reply to
Aidan Grey

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