Keithley 2635 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 17-3
Series 2600 System SourceMeter® Instruments Reference Manual Section 17: Routine Maintenance
Perform the following steps to replace the line fuse:
1. Carefully grasp and squeeze together the locking tabs that secure the fuse carrier to the
fuse holder.
2. Pull out the fuse carrier, and replace the fuse with the type specified in Table 17-1.
CAUTION To prevent instrument damage, use only the fuse type specified in
Table 17-1.
3. Reinstall the fuse carrier.
If the power line fuse continues to blow, a circuit malfunction exists and must be corrected. Return
the unit to Keithley Instruments for repair.
Table 17-1
Line fuse
Line voltage Rating
Keithley Instruments
part no.
100-240V 250V, 3.15A, Slow
Blow 5 × 20mm
FU-106-3.15
Front panel tests
There are two front panel tests: one to test the functionality of the front panel keys and one to test
the display.
Keys test
The KEYS test lets you check the functionality of each front panel key. Perform the following steps
to run the KEYS test.
1. Press MENU > Display > TEST.
2. Select DISPLAY-TESTS, and press ENTER or the navigation wheel
3. Choose one of the folowing:
• KEYS
• DISPLAY_PATTERNS
4. Select KEYS, and press ENTER or the navigation wheel to start the test. When a key is
pressed, the label name for that key will be displayed to indicate that it is functioning
properly. When the key is released, the message “No keys pressed” is displayed.
5. Pressing EXIT tests the EXIT key. However, the second consecutive press of EXIT aborts
the test and returns the instrument to the DISPLAY menu. Continue pressing EXIT to back
out of the menu structure.
Display Patterns test
The Display Patterns test lets you verify that each pixel and annunciator in the vacuum fluorescent
display is working properly. Perform the following steps to run the display test:
1. Press MENU > DISPLAY > TEST.
2. Select DISPLAY-TEST, and press ENTER or the navigation wheel to display the following
menu:

Keithley 2635 Specifications

General

Brand	Keithley
Model	2635
Category	Measuring Instruments
Language	English