For continued protection against fire or instrument damage, replace the fuses only with the
type and rating shown above. If the instrument repeatedly blows fuses, correct the cause of
the problem before replacing the fuses.
Front-panel display
Do not use sharp metal objects, such as tweezers or screwdrivers, or pointed objects, such as pens
or pencils, to touch the touchscreen. 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 touchscreen display, use a soft dry cloth. If necessary, use a
microfiber cloth dampened with an ammonia-free glass cleaner. Do not spray cleaning fluids onto the
display. You can also use a mixture of 70% isopropyl alcohol and 30% water.
Adjusting the display
You can use the Front Panel Control option to adjust the brightness of the screen.
The Front Panel Control option is in the Windows system tray at the bottom right of the screen.
Fan operation
If the 4200A-SCS fan stops or is running too slowly, a warning message is displayed on the
instrument. If the fan does not return to normal within five minutes of the initial warning, the
4200A-SCS is shut down to prevent system damage from overheating.
If the system was powered down because of a fan problem and is then powered up, another warning
message is displayed to indicate the reason for the shutdown.
If you see this message repeatedly, contact Keithley Instruments. See Service tek.com/service for
contact information.
For detail on fan operation, you can open the 4200A-SCS System Monitor. This is available in the
Windows system tray.
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