Pollution degree
description
A measure of the contaminants that could occur in the environment around and
within a product. Typically the internal environment inside a product is
considered to be the same as the external. Products should be used only in the
environment for which they are rated.
■
Pollution Degree 1. No pollution or only dry, nonconductive pollution
occurs. Products in this category are generally encapsulated, hermetically
sealed, or located in clean rooms.
■
Pollution Degree 2. Normally only dry, nonconductive pollution occurs.
Occasionally a temporary conductivity that is caused by condensation must
be expected. This location is a typical office/home environment. Temporary
condensation occurs only when the product is out of service.
■
Pollution Degree 3. Conductive pollution, or dry, nonconductive pollution
that becomes conductive due to condensation. These are sheltered locations
where neither temperature nor humidity is controlled. The area is protected
from direct sunshine, rain, or direct wind.
■
Pollution Degree 4. Pollution that generates persistent conductivity through
conductive dust, rain, or snow. Typical outdoor locations.
Pollution degree
Pollution Degree 2 (as defined in IEC 61010-1). Note: Rated for indoor, dry
location use only.
Measurement and
overvoltage category
descriptions
Measurement terminals on this product may be rated for measuring mains
voltages from one or more of the following categories (see specific ratings
marked on the product and in the manual).
■
Measurement Category II. For measurements performed on circuits directly
connected to the low-voltage installation.
■
Measurement Category III. For measurements performed in the building
installation.
■
Measurement Category IV. For measurements performed at the source of
low-voltage installation.
NOTE. Only mains power supply circuits have an overvoltage category rating.
Only measurement circuits have a measurement category rating. Other circuits
within the product do not have either rating.
Compliance information
xvi TBS1000B and TBS1000B-EDU Series Oscilloscopes User Manual
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