Appendix G: Inspection and Cleaning

Inspect and clean the instrument as often as operating conditions require. The collection of dirt can cause instrument overheating and breakdown. Dirt acts as an insulating blanket, preventing efficient heat dissipation. Dirt also provides an electrical conduction path that can cause an instrument failure, especially under high-humidity conditions.

￿￿UTION￿ To prevent damage avoid the use of chemical cleaning agents that might damage the plastics used in this instrument. Use only deionized water when cleaning the menu buttons or front-panel buttons. Use a ethyl alcohol solution as a cleaner and rinse with deionized water.

Avoid the use of high pressure compressed air when cleaning dust from the interior of this instrument. (High pressure air can cause ESD.) Instead, use low pressure compressed air (about 9 psi).

Inspection ￿ Exterior Using Table G-1 as a guide, inspect the outside of the instrument for damage, wear, and missing parts. You should thoroughly check instruments that appear to have been dropped or otherwise abused to verify correct operation and perfor- mance. Immediately repair defects that could cause personal injury or lead to further damage to the instrument.

Table G￿1: External inspection check list

Item

Inspect for

Repair action

 

 

 

Cabinet, front panel, and cover

Cracks, scratches, deformations, damaged

Replace defective module

 

hardware or gaskets

 

 

 

 

Front"panel knobs

Missing, damaged, or loose knobs

Repair or replace missing or defective knobs

 

 

 

Connectors

Broken shells, cracked insulation, and

Replace defective modules; clear or wash out

 

deformed contacts. Dirt in connectors

dirt

 

 

 

Carrying handle and cabinet feet

Correct operation

Replace defective module

 

 

 

Accessories

Missing items or parts of items, bent pins,

Replace damaged or missing items, frayed

 

broken or frayed cables, and damaged

cables, and defective modules

 

connectors

 

AWG2021 User Manual

G￿1