18-2
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6482-901-01 Rev. A / August 2012
Section 18: Routine Maintenance
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Introduction
The information in this section deals with routine maintenance of the Keithley Instruments
Model 6482 that can be performed by the operator.
Setting the line voltage and replacing the line fuse
WARNING
Before changing the line voltage or replacing the line fuse, disconnect the line
cord at the rear panel and remove all test leads connected to the instrument.
Failure to do so could expose the operator to hazardous voltages that could
result in personal injury or death.
The Model 6482 operates from a line voltage in the range of 100 V, 120 V, 220 V, and 240 V (±10
percent) at a frequency of 50 Hz or 60 Hz. Before plugging in the instrument, make sure the line
voltage setting that is visible through the small window in the power module (see item 4 in
) is correct for the line voltage in your area.
WARNING
To prevent injury, death, or instrument damage, use only the correct fuse type
(see
).
The power line fuse is accessible from the rear panel and is integral with the AC power module
(
).
To change the line voltage setting or replace the line fuse:
1. Place the tip of a flat-blade screwdriver into the power module by the fuse holder assembly
(see item 1 in
). Gently push in and to the left. Release pressure on the assembly
(2) and its internal spring will push it out of the power module.
2. Remove the fuse (3) and replace it with the type listed in
CAUTION
For continued protection against fire or instrument damage, replace the fuse
only with the type and rating listed. If the power line fuse repeatedly opens
(the fuse blows), the instrument will require servicing.
3. If configuring the instrument for a different line voltage, remove the line voltage selector from
the assembly and rotate it to the proper position. When the selector is installed into the fuse
holder assembly, the correct line voltage appears inverted in the window (4).
4. Install the fuse holder assembly into the power module by pushing it in until it locks in place.
If the power line fuse continues to open, a circuit malfunction exists and must be corrected. Return
the instrument to Keithley Instruments for repair.
Summary of Contents for 6482
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