Power-Up Procedure; Line Voltage Setting; Figure 3-3 Cleaning Air Filter - Keithley 3321 Operator's Manual

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SECTION 3
Operation
Rear Panel
(2)
Remove and Clean
Air Filter
Figure 3-3. Cleaning Air Filter
(1) Remove the inner holder
LINE SUPPLY-Set
this switch to the available line volt-
age. Changing the line voltage setting will require a fuse
change. See paragraph 3.3.1 for details.
LINE 4%62Hz - Power Receptacle and Fuse. Use the
supplied line cord to connect the instrument to the line
power. Fuse replacement is covered in paragraph 3.3.2.
CAUTION
To prevent damage to the instrument that
may not be covered by the warranty, be sure
to turn off power and disconnect the line
cord before changing the line voltage set-
ting. Do not use a fuse other than the one
specified for the line voltage setting.
3.3 POWER-UP PROCEDURE
3.3.1 Line Voltage Setting
The instrument is designed to operate from 90-l32V or
19%250V line power ranges at 48 to 62Hz. Perform the
following procedure to set the line voltage:
WARNING
Make sure the instrument is disconnected
from the power line and all other equipment
before proceeding.
Safety Ground Terminal - If the instrument is not con-
netted to a safety earth ground through the supplied
3-prong line cord, connect this terminal to a known safety
earth ground using #18 AWG (or larger) wire.
1. Check the line voltage setting of the LINE SUPPLY
switch on the rear panel. To change the setting, use a
flat-blade screw driver to set the rotary switch to the
setting that best matches the available line power.
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