Lake Shore Model 332 Temperature Controller User’s Manual
8.2
LINE VOLTAGE SELECTION
Use the following procedure to change the instrument line voltage selector. Verify the fuse value
whenever line voltage is changed.
WARNING: To avoid potentially lethal shocks, turn off controller and disconnect it from AC
power before performing these procedures.
1. Identify the line input assembly on the instrument rear panel. See Figure 8-1.
2. Turn the line power switch OFF (
O
).
3. Remove the instrument power cord.
4. With a small screwdriver, release the drawer holding the line voltage selector and fuse.
5. Slide out the removable plastic fuse holder from the drawer.
6. Rotate the fuse holder until the proper voltage indicator shows through the window.
7. Verify the proper fuse value.
8. Re-assemble the line input assembly in the reverse order.
9. Verify the voltage indicator in the window of the line input assembly.
10. Connect the instrument power cord.
11. Turn the line power switch On (
l
).
120
100/120/220/240 V
10% +6% Voltage
50-60 Hz 150 VA MAX
100/120V
220/240V
1.6 A T 250V
0.75 A T 250V
5×20mm
5×20mm
Line Cord
Input
Power Switch
O
= Off,
l
= On
Fuse
Drawer
Screwdriver
Slot
F-332-8-1.eps
Figure 8-1. Power Fuse Access
8.3 FUSE
REPLACEMENT
Use the following procedure to remove and replace a line fuse.
WARNING: To avoid potentially lethal shocks, turn off controller and disconnect it from
AC power before performing these procedures.
CAUTION:
For continued protection against fire hazard, replace only with the same fuse type
and rating specified for the line for the line voltage selected.
NOTE:
Test fuse with an ohmmeter. Do not rely on visual inspection of fuse.
1. Locate line input assembly on the instrument rear panel. See Figure 8-1.
2. Turn power switch Off (
O
).
3. Remove instrument power cord.
4. With a small screwdriver, release the drawer holding the line voltage selector and fuse.
8-2
Service
