Front-Panel Display - Keithley 2450 Reference Manual

Appendix A: Maintenance
4. Use the screwdriver to lift the tab from the AC receptacle.
5. Slide the fuse drawer out. The fuse drawer does not pull completely out of the power module.
6. Snap the fuse out of the drawer.
7. Replace the fuse.
8. Push the fuse drawer back into the module.
If the power line fuse continues to blow, a circuit malfunction exists and must be corrected. Return the
instrument to Keithley Instruments for repair.

Front-panel display

Do not use sharp metal objects, such as tweezers, screwdrivers, or pointed objects, such as pens or
pencils, to touch the LCD touch screen. It is strongly recommended that you use only fingers to
operate the instrument. Use of clean room gloves to operate the touchscreen is supported.
Cleaning the front-panel display
If you need to clean the front-panel LCD touch screen display, use a soft dry cloth.
Abnormal display operation
If the display area is pushed hard during operation, you may see abnormal display operation. To
restore normal operation, turn the instrument off and then back on.
Removing ghost images or contrast irregularities
If the display has been operating for a long time with the same display patterns, the display patterns
may remain on the screen as ghost images and a slight contrast irregularity may appear. Note that if
this occurs, it does not adversely affect the performance reliability of the display.
To regain normal operation, stop using the front-panel display for some time. You can turn off the
front-panel display while continuing operation using remote commands.
To turn off the front-panel display using a SCPI command:
Send the command:
DISPlay:LIGHt:STATe OFF
To turn off the front-panel display using a TSP command:
Send the command:
display.lightstate = display.STATE_LCD_OFF
A-2
Model 2450 Interactive SourceMeter® Instrument Reference Manual
2450-901-01 Rev. B/September 2013