Power Supply - palintest Pooltest 25 Manual

'Unplugged' – Note that the 'Hard Drive' or 'Com Port' may only be
selected while the instrument is being powered via its USB port. If the
instrument is running on batteries, and is not connected to either a PC or a
PT745 external power supply, the 'Unplugged ' will be displayed instead of
either 'Hard Drive' or 'COM Port'.

Power Supply

The photometer is designed to operate on alkaline batteries.
The photometer features a battery indicator – see 'System Mode' functions. A
minimum voltage of 3.0V is needed to operate the photometer.
In addition to the above feature, a battery-warning message will appear
automatically on the display when the battery voltage becomes low. The
batteries should be replaced as soon as possible after the warning message
appears.
35