I have a Druck DPI 282 (Digital Process Indicator) measuring water pressure in bar.
I am using the current output 4-20 mA which equates to 0-25 Bar. I am connecting it through a LJ_Tick Current Shunt. When I run my program I am getting some strange results. The output is slightly higher than expected (around 0.7Bar) this would not be a problem as I could just set an offset but the readings are quite erratic and fluctuate as much as 0.3Bar.
Now the strange bit, the reading on the 282 unit itself is consistent and I measured the current coming out of it and its what I expected it to be. I then used a current source to feed the labjack with the same current and the labjack reads a consistent correct value. So the problem only arises when I connect the 282 to the labjack.
Any suggestions would be great!