I'm using NI-DAQmx 7.5, Labview 7.0, and a USB-6009. I'm trying to get a more accurate reading from my j-type thermocouple. It is now distorted with noise and jumps rapidly +/- 20 degrees around room temp without any heat being applied. When heat is applied, it climbs as it should but with the same variation. I haven't moved to the labview side of it yet, I'm still trying to get a usable reading in MAX. I have it wired as a differential input with a floating signal source. I've installed 10k ohm resistors for bias current return as instructed. Installing the resistors helped but still leaves me with the readings shown in the attached pic. I've also tried grounding my USB 6009 with no results. Please help. john

LabVIEW

Hello Kenny,

I'm interested in having your program for the AD590 and USB6008.

Can you send it to me at this email :barankhaksari@gmail.com

Message 21 of 22

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Hi barankhaksari,

LabVIEW comes with a lot of example VIs…

All you need is a simple DAQmx routine to read voltage signals!

Best regards,
GerdW

using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019

Message 22 of 22

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