Instruction manual

330 Appendix G

Information on Maintenance

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 3.5-mm connector (7-mm connector when the conversion adapter is connected) is used

for the test head of the 4287A. 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