HP 8112A, Operating, Programming And Servicing Manual

Page: 38 / 406

Power Requirements
and Line Voltage
Selection
Caution
I
Caution
I
3-2
Installation
BEFORE APPLYING AC LINE POWER TO THE HP 8 1 1 2A,
ensure that the instrument is set to the local line voltage and the
correct line fuse is installed in the fuse holder.
The instrument requires a power source of 100, 120, 220 or 240 V
rms
(
+53, - 103
)
at a frequency of 48-440 Hz single phase. The
maximum power consumption is 120 VA.
The line voltage selector switches can be seen through the left hand
side of the instrument cover towards the rear. The line voltage
selector is set at the factory to the most commonly used line voltage
for the country of destination. The instrument power fuse is located
on the rear panel.
o
�: �
�:� �
o
L I NE VOLTAGE SELECTOR
o
:�� �
;;: �
o
Figure
3-1.
Line Voltage Selector Switches
Do not change the Line Voltage Selector switch settings with the
instrument switched ON, or with power connected via the rear panel.
To change the selected line voltage:
1 . Remove the power cord.
2. Remove the instrument top cover by releasing the captive securing
screw at the rear, and sliding the cover off.
3. Using a screwdriver, move the switches to the required position for
the voltage to be used.
4. Replace the instrument top cover.
5. Fit the correct power fuse for the selected operating voltage.
Table
3-1.
Line Voltage and Fuse Selection
Line Voltage Fuse Type HP Part Nwnber
100
v /
120
v
1.5 A 2110-0043
220
v /
240
v
750 mA 2110-0813