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According to page 12 of the manual, 1. Touch Stop/Clear so that time of day appears, then 2. Touch Start/Enter and hold until "LOCKED" appears (about 4 seconds). To cancel, touch Start/Enter for about 4 seconds until "LOCKED" diapears and time of day returns. IMO: This would only be good for use with small children who do not see you do this.
Sorry, there was a problem. Please try again later.Press the Stop/Clear button, then hold the Start button for a few seconds, until the display shows "Locked". Hold the Start button for a few seconds to unlock.
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