Ultrawave Qi Series Operator's Instruction Manual page 18

Screen 2: Time used
This screen shows the total time your Qi-Series ultrasonic bath has been in
use in days, hours and minutes; i.e. the sum of all the cleaning cycle times
since new.
For example, the screen above shows that the bath has been in use for a
total of 2 days, 5 hours and 27 minutes.
Screen 3: Clock
The Qi-Series is fitted with a real time clock. This is factory set to the correct
time and date, but can be changed by the operator.
To change the time and date, scroll through the settings by pressing the
MENU key and amend by pressing the UP and DOWN keys. When all the
settings are correct, press the MENU key to move to the next screen.
Qi Operating Manual 18 C6027205