Hi there,
I am having issues calibrating my strain gages using the LabVEW software, NI 9219, and CompactDAQ. When I attempt to calibrate my gages under the "device" tab within the DAQ Assist in LabVIEW, I receive a very large percent error value (around 30000%) which does not change or reduce regardless of the amount of calibrations I complete (by pressing the "calibrate button").
These strain gages are already installed beneath concrete, so should it be expected that the percent error would be high considering the gages are likely not experiencing exactly zero strain? How significant is this percent error value? Does it indicate inaccuracy within results?
Additionally, all the strain gages installed produce the exact same strain values after calibration--from past experience this seems incorrect, as typically the values slightly fluctuate, rather than all being the exact same number.
Finally, do the strain gages have to be calibrated each time a measurement is taken? I am looking to record readings once every day, and do not have enough ports to 'assign' each strain gage its own, so should a calibration be completed each day prior to taking strain measurements?
Any insight is greatly appreciated!
Any insight to this is greatly appreciated!
