Calibration of SLC Analog Input and Output Module

Hi,
Anybody with useful information on how to calibrate analog input and output module of SLC RSLogix500.
Thanks

Depends on the level of accuracy required, in some cases meters etc must have certified calibration like NIST.

Basically its just use a variable source and a meter to verify that your input correlates appropriately to the values in the plc based on the resolution available...ie 8 bit resolution is 0-255 and the input is 0-10 therefore 25 would approximately equal 1 volt and 4 volts would be 102.