Here are the steps for removing any password from the ADS200, when the password isn’t known.
1.Turn Power off.
2.Press and Hold up/down keys.
3.Turn Power on while continuing to hold the up/down keys.
4.After the microprocessor version is shown (or when the unit first lights up), release the UP/Down keys.
5.The unit will ask for the password. Scroll down until the Display reads 722.
6.Press and release Black button.
The password is now removed, and program will return to normal operation