4
Fig. 1. Setting the Line Voltage and Replacing the
Fuses.
NOTE
The spindles on each side of the drum are octagonal, not
round. This gives each of the 4 settings a definite detent.
To avoid eroding these detents, always remove the drum
before rotating it.
CAUTION
Do not use makeshift fuses or short-circuit the fuse
holders.
materials until the unit has been checked for
pos sible concealed damage. The power cord is
packed with the unit and attaches to a 3-pin
connector that is mounted on the rear of the 4002P
Portable Power Supply
3.2. SELECTING THE MAINS VOLTAGE
The 4002P uses a Corcom Power Entry Module
(Fig. 1), whic h contains the power connector; a
s mall, removable drum for setting the line voltage;
and a line fuse. The removable drum lets you
configure the instrument for a nominal 100, 120,
220, or 240 V ac. The module door has a small
window that shows the line volt age setting now in
use.
To change the ac input voltage:
Disconnect t he instrument from the ac power
source. Use a small flat-blade screwdriver or similar
tool to pop open the module door. Remove the
plastic drum: pinch the sides of the drum with your
fingernails and pull, or insert a flat-blade screwdriver
in the slot between the
120Vac
and
240Vac
settings
and gently pry the drum loose, one end at a time.
Rotate the drum until the desired line voltage setting
will s how in the door window, and firmly press the
drum back into the holder. Close
the module door. You are now ready to reconnect
the instrument to the ac power source.
3.3. REPLACING THE FUSES
The 4002P requires the following fuses:
!
For 100 or 120 V ac line voltage, a 2-A (FAST)
size 3AG fuse.
!
For 220 or 240 V ac line voltage, a 1 A(F) size
5×20-mm fuse.
The 3AG fuse requires a Corcom LA200 fuseholder.
The 5×200-mm fuse requires a Corcom LA201
fuseholder. (We supply the appropriate fuse and
fuseholder based on your order specifications.)
To replace a fuse:
Disconnect the instrument from the ac power
source. Use a small flat-blade screwdriver or similar
tool to pop open the module door. The line fuse is in
a plastic fuseholder drawer marked with an arrow
(
). Gently pull the fuseholder out and replace the
fuse. If changing to the metric type fuse be sure to
install the corresponding fuse holder. Slide the
fuseholder back into the module and close the
module door. You are now ready to reconnect the
instrument to the ac power source.
3.4. LOCATION
The ORTEC 4002P Portable Power Supply is a
completely portable, self-contained unit that is
designed for table-top installation. The basic design
of t he cabinet provides for cooling of the power
supply by natural convection flow. The power supply
should not be positioned so as to block the flow of
air around and through the cabinet. Avoid locating
the power supply near or above heat-producing
equipment without accounting for the temperature
rise.
3.5. COMPATIBILITY
The ORTEC 4002P Port able Power Supply is
