Hi, I have a small trouble reading from the DMM. I have conncted my DMM to the points where I want to measure the voltage difference(1.7mv). When I used the DMM soft front panel, I can read the values precisely,even at higher range. But I tried to read the value from TestStand and Lab windows. the value keep changing every time I make the measurements. When I loop the measurement step, it returns ranging from 4.8mv to -0.5mv and its quite a lot of difference from the actuval value. i have even tried to use the recommended/default sample time -1, but of no use. The same thing happens in Labwindows interactive execution. Is there anything I can make my code better to get accurate measurements. Attached is my Labwindows code. Thanks mama007 Message Edited by mama007 on 07-10-2006 07:00 AM

Digital Multimeters (DMMs) and Precision DC Sources

DMM read different values each time

Author

Thanks Mark,

It did make a difference by using 61/2 digit resolution. The measurement does vary by thye last digit only, but centainly I feel this is not a good way of filtering the noice. Is there any right solution for this problem. And I am also not sure weather this will work with my 4060.

Also there was a filter tick option in the front panel, but there is no such function in my current device library(DMM V2.1). Is there anything particularly useful in the higher versions that can help solving the noice problems in the right way.

Thanks

mama007

Message Edited by mama007 on 07-20-2006 08:37 AM