HP 8530A, Руководство по эксплуатации и программированию, Страница: 392 / 439

Routine Maintenance
Routine Maintenance consists of ve tasks that should be performed at least every six months .
If the system is used daily on a production line or in a harsh environment, the tasks should be
performed more often. The tasks are:
Maintain proper air ow .
Inspect and clean connectors .
Clean the glass lter (and display as required).
Degauss the display .
Maintain Proper Air Flow
It is necessary to maintain constant air ow in and around your receiver system. If the
message , CAUTION: FREQUENCY CONVERTER IS TOO HOT! or CAUTION: TEST SET IS TOO HOT!
is displayed, make sure the frequency converter fan is not blocked. Items on top of the
frequency converter or around the system may also impede the air ow . The test set will
not shut down if it becomes too hot! If the HP 8530 overheats , it will shut down until the
temperature drops to the operating range .
A dditionally , it is recommended that the source fan lter (if any) be inspected periodically and
be cleaned if necessary .
Connector Care
The condition of system connectors has a serious aect on measurement accuracy . W orn,
out-of-tolerance , or dirty connectors degrade measurement accuracy . F or more information
on connector care , please see Application Note 326 Coaxial Systems Principles of Microwave
Connector Care.
Recommended Practices
HP strongly recommends that you use a \connector saver" on the RF input of the mixers .
This is especially important on the test mixer , which is connected and disconnected often. A
\connector saver" is an adapter or short cable . This practice has two important advantages:
The \connector saver" receives daily wear , the mixer input connector does not. This greatly
extends the life of the mixer's input connector .
It is the connector saver that gets dirty with use , not the mixer connector .
When you must clean the connector saver , remove it from the mixer . This protects the mixer
from static discharge .
Caution
The HP 8530A and HP down converters contain static sensitive devices . Do
not touch the center conductor of any connector , or the center conductor of
any cable connected to the HP 8530A or its downconverter . W ear a grounded
anti-static strap when cleaning connectors .
Operator's Check and Routine Maintenance 19-3