Set the Calibration Mode to Calibrated in the C Series Module Properties dialog box for the NI 9251 if you want the FPGA I/O Node to return calibrated, fixed-point data from the module.

When Calibration Mode is set to Raw, the FPGA I/O Node returns calibrated, binary data from the module. Convert the binary values to engineering units. You must convert these values in the host VI.

Using an Equation to Convert Binary Voltage Values to Volts

Use the following equation in the host VI to convert binary voltage values to volts:

Volts = Binary Value × 515589 pV/LSB

Where
  • Binary Value is the value returned by the FPGA I/O Node.