CONTROLS AND CONNECTORS
Controls and connectors necessary fo r proper operation
of the instrument are located on the front, side, and rear
cabinet panels. To make fu ll use o f the capabilities o f this
instrument, the operator should be familiar w ith the func
tion and use o f each external control and connector. A
brief description and use o f each external control and con
nector is given herein
POWER SOURCE AND CONNECTORS
W A R N I N G |
Change o f ac in p u t voltage m ust be accom
plished b y qualified service personnel only.
1.
Power Source Selector sw itch-Three position switch
provides operator selection o f ac line voltage, external dc
voltage or battery operation. The ac position, in conjunc
tio n w ith the AC In p u t Voltage Selector switch, allows the
305 to be operated over a range o f ac line voltages. Power
Source Selector switch also provides operator selection of
a Full or Trickle charge rate to internal batteries (Figure 21.
2.
AC Input Voltage Selector s w itc h -In conjuction
w ith the Power Source Selector switch, allows the instru
ment to be operated from 115 or 230 nominal ac line
voltage (Figure 2).
Figure
2
. V ie w o f rear cover.
6
305 Operators
REV A SEP 1979