YSI 9300 Photometer - Manual (Page 8)

5
Replacing the Batteries
The battery compartment in the base of the instrument is secured by four
screws. To replace the batteries, remove the cover and install the batteries,
observing the correct polarity as indicated. Use 3 x 1.5V 'AA’ alkaline batteries
or equivalent. To avoid corrosion damage through leakage, remove batteries
from the instrument if it is to be stored or left unused for a long period of time
(> 30 days).
Power Supply (Model 9500 only)
The 9500 photometer can be powered either from alkaline batteries or via the
USB socket. To use mains power, the instrument is connected using the USB
Connection Cable (YPT 284) plugged to the Mains Adapter (YPT283).
Alternatively, the USB connection cable can be plugged into a computer to
power the 9500 from the computer.