11
INSTALL FUSES AND SELECT
PROPER VOLTAGE
Figure 10.
Fuse Box and Voltage Selector
1. On the back panel, locate the Fuse Box and Voltage
Selector receptacle. (See the Rear Panel diagram on
page 10
for the location.)
2. Insert a small fl athead screwdriver into the slot (1) at the
top of the receptacle and twist to open faceplate. The red
fuse drawer and fuses are located in the Ship Kit.
3. On the face of the fuse drawer are two voltage choices.
Based on your country, select the proper fuses to install.
VOLTAGE
FUSE
PART NUMBER
100-120 V
1.25 A, 250 V,
fast blow
Littelfuse 5 x 20 mm,
Part #02351.25HXP
220-240 V
0.63 A, 250 V,
fast blow
Littelfuse 5 x 20 mm,
Part #0217.630MXP
CAUTION: It is imperative that the correct voltage
is used. Serious damage can occur if the incorrect
voltage is selected.
4. Insert the fuses as shown in
Figure 11
, with a short fuse
at the contact end of the receptacle. Then, turn the drawer
until the correct voltage label is at the top and replace it
in the receptacle. Press fi rmly to make sure the drawer is
completely seated. It should be fl ush with the receptacle.
Figure 11.
Fuse Installation and Voltage Selector
5. Close the faceplate, again pressing fi rmly until it is fl ush.
The correct voltage label is shown through the Voltage
Window (2) on the faceplate.
CONNECT POWER
Insert the female end of the IEC AC power cord into the Power
receptacle on the back panel and then plug the male end into
the power source.
WIRE A TEST LOAD
Use of a test load is recommended for setup of the QCL
instrument. Use the Wavelength test loads listed on page 1, or
when building your own test load, a 10
Ω
resistor with a 50 W
power rating is recommended for the QCL500, QCL1000,
and QCL1500. For the QCL2000, a 50 W 5
Ω
resistor is
recommended.
•
Install the test load by either connecting to the QCL SMA
port or wiring the load to PIN 5 and PIN 9 on the QCL
D-SUB as shown in
Figure 12
.
QCL
SMA
QCL
1
1
NOTE:
The SMA case is electrically connected to the QCL chassis.
QCL D-SUB
6 7 8
9
1 2 3 4
5
Figure 12.
QCL Wiring Diagram
-V
Pin 9 QCL +
or SMA Outer Ring
Pin 5 QCL -
or SMA Center Pin
QCL Driver
Current Sink
Test Load
Figure 13.
Test Load Polarity Diagram
