434
Appendix F
Information on Maintenance
Cleaning this Instrument
Cleaning this Instrument
This section describes how to clean the instrument.
WARNING
To protect yourself from electrical shock, be sure to unplug the power cable from the
outlet before cleaning the instrument.
Never clean the internal components of the instrument.
Cleaning an LCD
Use one of the following methods to clean the display surface regularly.
•
For normal cleaning, wipe the surface gently with a soft cloth that is dry or wetted with
a small amount of water and wrung tightly.
•
When stains are difficult to remove, gently wipe the surface with cloth damped with a
small amount of ethanol or isopropyl alcohol.
NOTE
Do not use chemicals other than ethanol and isopropyl alcohol to wet the cleaning cloth.
Maintenance of Connectors/Ports
A 7-mm connector is used for the test head of the E4991A. The N-type connector is used
for the front panel. In the RF band, dirt or damage to connectors significantly affects
measurement accuracy. Take special care about the following.
•
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.
Observe the above instruction for the connectors and ports not on the test head or the front
panel.
Procedure to replace center conductor collet of 7-mm connector.
Required tools
Agilent part number
Collet removal tool
5060-0370
6-slot precision collet
85050-20001
Summary of Contents for E4991A
Page 6: ......
Page 24: ...18 Contents ...
Page 80: ...74 Chapter3 Setting Measurement Conditions Averaging Measurement Results ...
Page 220: ...214 Chapter9 Setup and Use of Control Management Functions System Recovery ...
Page 338: ...332 AppendixB Probe Station Connection Kit Option 010 OPEN SHORT LOAD Calibration ...
Page 428: ...422 AppendixD Menu References Menu References ...
Page 482: ...476 AppendixI Messages Wait measuring comp standard ...