Replacement Of Parts With Limited Service Life - Keysight E4990A Help Manual

E4990A Help
You can clean the standard LCD (no touch screen function) with a
cloth dipped in water and then wrung tightly.
to wet the cleaning cloth. To clean the touch screen LCD, do not
wet the cloth with water.
Maintenance of Test Ports and Other Connectors/Ports
The ports of the E4990A are fitted with BNC connectors. Stains or other
damage to these connectors would significantly affect the accuracy in
measurements. Always pay attention to the following precautions.
Always keep the connectors free from stains and dust.
•
Do not touch the contact surface on the connectors.
•
Do not plug damaged or scratched connectors into the test ports.
•
Use compressed air for cleaning connectors. Do not use abrasives
•
under any circumstance.
The above precautions must also be observed in maintaining connectors
and ports other than these test ports.
Cleaning Parts Other than the LCD, Test Ports, and Other Connectors/Ports
To remove stains on parts other than the LCD, test ports, and other
connectors/ports of the instrument, wipe them gently with a soft cloth that
is dry or wetted with a small amount of water and wrung tightly.

Replacement of Parts with Limited Service Life

This instrument incorporates parts with limited service life as shown in the
following table. Using the recommended replacement time as a guide,
request the Agilent Service Center to replace these parts. However, a part
may need to be replaced at an earlier time than that listed in the table,
depending on conditions such as location, frequency of use, and where it is
stored.
time listed below is for reference only and does not imply a
guarantee of the part's service life.
Part
Name
Solid State
Drive
(SSD)
236
Do not use chemicals other than dehydrated ethanol
Each service life and recommended replacement
Service Life (Parts supplier
reference value)
5 years or 20,000 operating hours,
whichever comes earlier. Exchanging
hard disk drives causes the contents
Recommended
replacement
time
3 years