Thanks for your reply.
I have coupled it as you say. The Vout from the sensor reads a 0.35 v constant voltage in labview when connected with the USB 6008. Then I used a voltmeter to measure between ground on usb6008 and Vout on sensor while it was connected with usb 6008. There still was a constant voltage of 0.35v. Then I disconnected the sensor output from analog in on usb 6008 and measured the output from the sensor with the voltmeter and it worked perfectly. Why does the usb 6008 make my sensor output constant?
Message Edited by WM John Weeks on 09-21-2005 01:14 PM
I am currently baffled on the LM35 issue, could you post your schematic diagram including connections to the 6008?
Yes, after my resistance post, I thought I'd come back to the LM35 post. Found it could supply 10mA, so I agree that the 144K shouldn't be an issue.
Thanks for all the replies.You are really trying to help.
I tested all inputs like you said in MAX, and they all read a constant voltage of 0,31v. But the sensor works when I disconnect it from the USB 6008, and measure with a regular voltmeter. Whats really weird is that I have tested my inputs on 6008 by connecting the outputs on the 6008 to them, and they work fine. What could be the difference between my voltmeter and the usb 6008 that makes only the voltmeter to work with the LM35?