Aeroflex 3901 - Page 9

Precautions
Subject to Export Control, see Cover Page for details.
vii
Definition of Installation Categories (ref IEC 664-1):
Fire Hazard
Make sure that only fuses of the correct rating and type are used for replacement. If an
integrally fused plug is used on the supply lead, ensure that the fuse rating is commensurate
with the current requirements of this equipment. Refer to ‘Platform Performance Data’ in Part
1 for power requirements.
Toxic Hazards
Some of the components used in this equipment may include resins and other materials which give
off toxic fumes if incinerated. Take appropriate precautions, therefore, in the disposal of these
items.
Beryllia
Beryllia (beryllium oxide) is used in the construction of some of the components in this equipment.
This material, when in the form of fine dust or vapor and inhaled into the lungs, can cause a
respiratory disease. In its solid form, as used here, it can be handled safely, however, avoid
handling conditions which promote dust formation by surface abrasion.
Use care when removing and disposing of these components. Do not put them in the general
industrial or domestic waste or dispatch them by post. They should be separately and securely
packed and clearly identified to show the nature of the hazard and then disposed of in a safe manner
by an authorized toxic waste contractor.
Beryllium Copper
Some mechanical components within this instrument are manufactured from beryllium copper. This
is an alloy with a beryllium content of approximately 5%. It represents no risk in normal use.
The material should not be machined, welded or subjected to any process where heat is involved.
It must be disposed of as “special waste.”
It must NOT be disposed of by incineration.
CAT I Circuits that are protected by devices limiting transient overvoltages to a low
level, e.g., electronic circuits protected by filters.
CAT II Circuits that are supply circuits for domestic or digital devices that may include
transient overvoltages with an average value, e.g., power supply for household
appliances and portable tools.
CAT III Circuits that are supply circuits for power equipment that may include large
transient overvoltages, e.g., power supply for industrial machines or equipment.
CAT IV Circuits that may include very high transient overvoltages, e.g., supply
distribution from power lines.