9208 inaccurate raw data

[JoMu2015]

Hi there I have a very confusing problem,  

I am using a 9188 XT  with a 9208 for  current measurement.  The 9208 currently hass 8 channels.  2 of these channes come from the same type of device and put out accurate readings.   6 of these channels come from the 6 output channels of a different device.  This device will display the current output signal  for each channel 4-20mA.    When I look at the unscaled, un-calibrated current signal in DAQmx  the currents are vastly differnt than those deplayed by the source device.   The device itself claims that output currents are on the range of unscaled, un-calibrated 4- 13.  DAQmx  says they are all arounf 13-15 mA.  Does anyone have any ideas about what could cause these readings to be so different?  or what to do about it.

Thanks so much,

[KathrynTheGreat]

Hi Jomu2015,

That's very odd, that the inputs are accurate on some channels, but not on others. Are you sure that the device is outputting the correct currents? That would be the first thing that I would check. Let us know whether the measurements match what the 9208 reads, or what the device claims it's sending out.

Here's a good tutorial on how to measure current using a multimeter, if you're not sure: Current Measurement Tutorial.