NI 9219 with load cell

[Yatsco]

Hello,

I am using the NI 9219 with a Futek Load Cell whose specifications are as follows:

	Name	Min	Typ	Max	Unit
	Channel: 1
	Compensated Temperature	60		160	F
	Excitation	1		20	Vdc
	Hysteresis	-.25		.25	% of R.O.
	Input Resistance		744		Ohms nom.
	Insulation Resistance	500			Mohms @ 50 Vdc
	Nonlinearity	-.25		.25	% of R.O.
	Nonrepeatability	-.05		.05	% of R.O.
	Operating Temperature	-60		200	F
	Output Resistance		700		Ohms nom.
	Safe Overload			150	% of R.O.
	Temperature Shift Span	-.01		.01	% of Load/F
	Temperature Shift Zero	-.01		.01	% of R.O./F
	Zero Balance	-1		1	% of R.O.
	Capacity			500	lbs
	Rated Output		2		mV/V nom.
	Calibration Excitation		10		Vdc

I am getting a signal from my load cell which is great, but I was wondering how you can adjust the signal output to have minimal interference from noise, vibrations, etc. and how to program the load cell that it can be calibrated to zero (0) before any data is aquired?

Any help is greatly appreciated! 

Thanks,

Yatsco

[Brandon_B]

Hello Yatsco,

Thank you for using NI forums.  One thing you will probably want to look into is using the filtering VI's in LabVIEW.  A low-pass filter can help to eliminate any high frequency noise from your measurement.  Also, take a look at the Field Wiring and Noise Considerations article for some more information on eliminating noise.  Lastly, this community example shows how you could calculate the DC offset and compensate for it before measuring your signal.  Please let me know if you have any additional questions concerning this application.

Regards,