Load Cell Calibration Mv V

Most quality load cells will come with a factory load cell calibration sheet which specifies the actual sensitivity rating for that individual load cell.

Load cell calibration mv v.

If the load cell s sensitivity is 3 mv v and the excitation voltage provided by the converter is 10 volts then the divider will be 30 millivolts or 0 03 volts. Figure 3 above is an example of a morehouse calibration shear web load cell with a non linearity specification of better than 0 05 of full scale. Span sensitivity mv v this is the full span output per supply volt characteristic for the load cell wheatstone bridge. So a 2 96 mv v load cell will provide 29 6 millivolt signal at full load when excited with 10 volts.

If a load cell has a 5 volt dc vdc excitation voltage and a 0 250 mv output the resultant ratio is 250mv 5vdc. The cell output is rated in millivolts per volt mv v of the difference voltage at full rated mechanical load. When shopping for load cells you are typically provided with two pieces of information about the load cell excitation voltage v orvdc and output mv. This equates to 50 mv per volt or has a 50 1 ratio.

In this example the actual non linearity is about 0 031 using mv v values and 0 032 when using calculated values which is well below the specification. This load cell sensitivity rating is specified on a load cell data sheet often in the 1 mv v 3 mv v range. The difference voltage proportional to the load then appears on the signal outputs. The millivolt output of a non amplified load cell is linearly proportional to the excitation voltage.