Supplying Voltage to Load Cells
Supplying Voltage to Load Cells
(OP)
Does anyone have an opinion on whether you should feed a load cell excitation voltage with a linear or switching power supply? I have an application where I am feeding a load cell with 10VDC excitation from a switching SOLA power supply and my raw weight signal has some variation. It seems to be at a constant frequency. Any suggestions?





RE: Supplying Voltage to Load Cells
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Supplying Voltage to Load Cells
You may have mains bourne interference causing your error voltage. Make sure that the signal and supply pairs are well twisted and if possible use an overall screen on the load cell cable.
To overcome AC mains interference an AC excitation scheme with phase sensitive detectors works well.
RE: Supplying Voltage to Load Cells