Specifications

3. Preparing the USN52 L for Operation
Page 14 USN52 L Operating Manual
Be sure to set the switch inside the battery compartment (preceding
illustration) for the correct type of battery. For alkaline batteries, set
the switch to the right. For NiCad, or other type of rechargeable
battery, position it to the left.
After the batteries have been installed, replace the battery cover and
tighten the battery cover knobs.
NOTE: When the battery indicator is in the last quarter ( ) , bat-
teries should be replaced as soon as possible. The USN52
L automatically turns off when the batteries become too
weak for reliable operation. Settings are saved and re-
stored when turned on again, after batteries have been re-
placed. When testing in remote locations, always carry spare
batteries.
3. Preparing the USN52 L for Operation
The USN52 L is supplied with a battery charger/power supply unit.
Refer to the separate instruction sheet supplied with the unit for
operating information.
3.1 Installing Batteries
Each battery in the battery pack is mounted separately in a holder
designed to prevent power interruption if the instrument is jolted.
To install batteries in the USN52 L, lay the instrument face
down, loosen the four knurled knobs on the back and lift off the
battery pack.
Insert 6 “D” size NiCad or alkaline batteries as shown below. Be
sure that all batteries are firmly seated to assure good contact. Check
that battery positive “button” is properly centered and seated in red
contact ring.