The FD-11613 and FD-11614 devices use software calibration to adjust the software scaling of signals read from and produced by your device. Using a precise reference signal, your device measures and calculates scaling constants for analog input. The scaling constants are stored in nonvolatile memory (EEPROM) on your device. Frequent calibration produces the most stable and repeatable measurement performance. The device is not harmed in any way if you recalibrate it often.
The FD-11613 and FD-11614 devices do not self-calibrate or automatically calibrate. You must use a manual procedure to calibrate these devices.