daq assistant calibration drift

[alana]

Helloo,

I am using the USB 6229 DAQ. In my VI I am using the DAQ assistant to calibrate my device before I begin recording. However I am finding that there is a constant drift in the 'uncalibrated value' before I commit the new values that I want to use.

Is this drift normal or is there a problem with my DAQ?

any help would be appreciated,

Al

[johnsold]

How much drift are you measuring?  Generally NI devices seem to be quite stable.  Are you allowing sufficient warm up time?

Lynn

[alana]

Hi,

The uncalibrated figure is approximately '0.4523' and it constantly reduces in size. If i leave it for 5 mins it will be around 0.3800. It doesn't seem like a majoy drift but the uncalibrated max and min points of my device are around 0.2 and 0.6.

The DAQ had been on for about 7 hours and i was detecting a drift so I restared everything and tried again numberous times over 2hrs and i detected the same drift in calibration.

any ideas?

Al

[johnsold]

What is connected to the input while this drift is occurring? What is the input configuration, differential or single ended?  What is the full scale range?

Lynn