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Labwindows Code for NI-4060/4070 measurements

Hi,
I have a  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 values ranging from 4.8mv to -0.5mv and its quite a lot of difference from the actuval value(1.7mV). I have even tried to use the recommended/default sample time -1, but of no use. The same thing happens in Labwindows interactive execution too.
 
Is there anything I can make my code better to get accurate measurements same as like from the front panel measurements.
Attached is my Labwindows code.
 
Thanks
mama007
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This is a duplicated thread, please see the link below for discussion.

http://forums.ni.com/ni/board/message?board.id=80&message.id=704

Thanks,

Rob

National Instruments | Northern California
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