Accu-Chek performa Owner's Booklet page 40

When you are setting the time for the alarm clock function, the bell symbol remains on the
display and "set-up" flashes continuously.
38
1. Press and release to
turn the meter on. The
flashing test strip symbol
appears.
2. Enter the set-up mode
(press and hold for
about four seconds).
"Set-up" flashes on the
display.
3. Press and release
repeatedly until you reach
the display with the bell
sym b ol, "OFF", and the
flashing "set-up" and
"A-1".