https://forums.ni.com/t5/Multifunction-DAQ/Strain-gauge-calibration-Err/m-p/4225279#M102403 <P>Hi,</P> <P>&nbsp;</P> <P>I'm using a strain gauge quarter-bridge system connected to a NI 9235 strain guage bridge module which is connected to a cDAQ 9171 connected to our computer to interface with LABVIEW 2021. Whenever calibrating the strain gauges within the DAQ assistant, the Err % values were relatively small (~0.01%), but now I'm getting an Err % that ranges from 10 - 50%. I've downloaded all the necessary drivers and followed the calibration procedure listed on the NI website for the cDAQ 9171 manual. NI MAX specifies that the device has been "Self-Tested" and working properly, I have two NI9235 and cDAQ 9171 devices and have already switched the devices and changed out my strain gauges but still receive similar Err % and not sure why this value is so high.&nbsp;</P> <P>&nbsp;</P> <P>This system is still new to me and I don't fully understand how the calibration works within the DAQ assistant. I could use help with understanding the system better and why the calibration is not working properly anymore.</P> <P>&nbsp;</P> <P>Thank you for any help you can provide.</P> Mon, 18 Apr 2022 21:19:28 GMT sbarksdale 2022-04-18T21:19:28Z https://forums.ni.com/t5/Multifunction-DAQ/Strain-gauge-calibration-Err/m-p/4225279#M102403 <P>Hi,</P> <P>&nbsp;</P> <P>I'm using a strain gauge quarter-bridge system connected to a NI 9235 strain guage bridge module which is connected to a cDAQ 9171 connected to our computer to interface with LABVIEW 2021. Whenever calibrating the strain gauges within the DAQ assistant, the Err % values were relatively small (~0.01%), but now I'm getting an Err % that ranges from 10 - 50%. I've downloaded all the necessary drivers and followed the calibration procedure listed on the NI website for the cDAQ 9171 manual. NI MAX specifies that the device has been "Self-Tested" and working properly, I have two NI9235 and cDAQ 9171 devices and have already switched the devices and changed out my strain gauges but still receive similar Err % and not sure why this value is so high.&nbsp;</P> <P>&nbsp;</P> <P>This system is still new to me and I don't fully understand how the calibration works within the DAQ assistant. I could use help with understanding the system better and why the calibration is not working properly anymore.</P> <P>&nbsp;</P> <P>Thank you for any help you can provide.</P> Mon, 18 Apr 2022 21:19:28 GMT https://forums.ni.com/t5/Multifunction-DAQ/Strain-gauge-calibration-Err/m-p/4225279#M102403 sbarksdale 2022-04-18T21:19:28Z