KRUUSE PS250 - Voltage testing; User mode; Automatic power-off

PS250 User Instructions
2.5 Voltage testing
The scale would test the voltage every 25 seconds. When the
voltage 5.6V <= U <6.5V,the display would shows just like
following ,to remind the operator to charge the battery.
When the voltage U <=5.6V,the display shows "LbAt ",and
power off
3 User mode
Press [TARE/ZERO]+[ON/OFF] buttons together to power on，
then enter the "User mode". Press [UNIT] button to move across
to the items which you require.Prsee [TARE/ZERO] button to
change the status or value of this item. Finally ,press
[PRINT/HOLD] button to save your changes and return to
weighing.
3.1 Automatic power-off
When you Press [TARE/ZERO]+[ON/OFF] buttons together to
power on, you would find following picture