In almost all cases, you will leave Autoscan On. During a ROM Scan, the patient performs a sequence of motions. The measurement of interest is the extent or “peak” of that motion. For example, you might be conducting a flexion-extension test where you are interested in the patient’s maximum flexion and maximum extension capabilities.
When Autoscan is On, the program automatically detects these peaks and displays them on screen for you. When you end the test, the program records these values. With Autoscan Off, you must manually indicate to the program when you believe the patient has reached these maximum values.