The VI is distributed with LabVIEW and NI-DAQ and can be found within the functions palette as follows:
Functions>>Data Acquisition>>Calibration and Configuration>>SCXI Calibration.vi (last row, fourth VI in row)
I use the LabVIEW Full Development Package (ver 6);however, I presume the VI should be found in very near the same location for later versions. If you can not find it, I can email a copy.