With MAX open, you can select DAQmx devices and for those that can be calibrated, you will have a calibration tab in the main window for the device. It lists last external cal date/time, expiration date/time, last self-cal date/time, termperature, etc. There are DAQmx functions for self-cal and external calibration that can be run (NI Measurements>DAQmx>DAQmx Advanced>DAQmx Calibration.