Specifications

Chapter 2: Installation
8 APx511 Installation
The mains power switch is to the left.
Checking the mains supply voltage configura-
tion
The white plastic voltage indicator pin protrudes through
one of the four labeled holes in the module cover to indi-
cate the selected input voltage. Figure 2 shows the pin in the
second position, indicating 120 V. Check to see that the
indicated voltage matches your mains supply voltage. If it
does not, change the mains supply voltage configuration as
described below.
Opening the power entry module
Unplug the power cord from the instrument before chang-
ing fuses or performing any other operations described in
this section.
To open the power entry module, refer to Figure 3 and pro-
ceed as follows:
Figure 3. Power entry module door and fuse block.
• Remove the mains power supply cord from the power
cord connector.
• Locate the slot in the module cover door hinge. The
hinge is a the left side of the cover door, and the slot in
the hinge is visible in the power cord connector cavity.
Insert a small screwdriver or similar tool in the slot and
pry the cover door hinge outward. The cover door will
snap out, and then can be pivoted on its hinge for access
to the fuse block assembly and voltage selector card.