Labjack w/Temp Sensor - WD Setup

Archive Archived Weather Display Usage Questions
1

The reading I was getting through WD for the temp sensor connected to the lab jack seemed a little high. I compared this reading to that of the program that came with the labjack and found that WD was reading a higher voltage off of the sensor that the labjack program. See the attached picture - WD has the temp at 83.3 with a voltage of 3.018 while the labjack software has a temp of 78.22 with a voltage of 2.988. Based on other temperature gauges in this room, the labjack reading seems to be the correct one.

Is there anything in WD that I can adjust the voltage read or do I just adjust the extra temperature sensor offsets in Control Panel - Offsets - Extra Temperature Offset (in 10th of a degree C), and just drop these down so that the temperatures match? Does WD just read the voltage differently? Anyone else seen this?

Thanks…

labjack1.GIF
labjack1.GIF800×600 78.9 KB

2

humm
wd uses the dll file provided…
that reading does tend to jump around a bit…and so wd takes a rolling average…

3

I have noticed that too while watching the labjack logger program. So, should I just watch it for awhile, figure out the average number of degrees that they are apart (about 5 degrees F it seems) and then use the offset to drop what WD displays to that number?

4

i have noticed an overead myself, and so used an offset,…for my soil temperature
i must have something wrong then…in the use the labjack reading
the formula is
(voltage*100)-273.15