Data different in DaqFactory than in Labjack Control Panel

[jshepley]

Am I nuts?

I'm using a Labjack UE9 in an instrumentation & control application. I just added a couple of LM34 temperature sensors to A/D channels 0 and 1. Using the LJ control panel, the values seem very reasonable - there is noise / changes on the 3rd significant digit (1/10ths of a degree F) and the data is stable.

On the DaqFactory, The values jump about 100 times as much. I'm using:

Device Type: LabJack

D#: 1

I/O Type: A to D

Channel: 0 or 1

Timing: 1

Conversion: LM34 to Deg F (Value*100)

The ambient temperature (A/D Channel 141) is read by DaqFactory perfectly. Other A/D channels also track perfectly with the known input / LabJack CP.

But the noise on Channels 0 and 1, as displayed by DF is over 10 degrees F (100mv)

Help?

[AzeoTech]

My guess is that the control panel set the UE9 into 16 bit resolution, while DAQFactory is just using whatever the default is (12 bit?). Try setting the resolution to 16 bit in DAQFactory as explained in the DAQFactory - LabJack application guide.

[LabJackSupport]

Added a simple example here:

http://labjack.com/support/ud/examples/daqfactory