The define know shunt option calculates the equivalent Physical span from a known shunt.
Enter the known shunt resistance and equivalent physical value and click OK.
This shunt tool allows the user to define a calibration step consisting of the selection of any one of the FCS shunt resistors along with the corresponding equivalent engineering value based on another Known Shunt calibration (an example of a Known Shunt calibration is that a 33.2 KOhm shunt produces a 2200 lb output). The equivalent engineering values for the FCS shunt resistors are computed using the following formula:
Ve = Vk * ((Rg + 2 * Rsk) / (Rg + 2 * Rse)) , where:
Ve = equivalent engineering units value
Vk = known engineering units value
Rg = nominal gage resistance
Rsk = known shunt resistance
Rse = equivalent shunt resistance