Product Description
R&S
®
RT-ZD01
6
User Manual 1422.0732.02 ─ 02
●
CAT IV:
For measurements performed at the source of the low-voltage installation,
such as electricity meters and primary overcurrent protection devices.
Fig. 1-1: Examples of measurement categories
The higher the category, the higher the expected transient overvoltage. Overvol-
tages can overload a circuit and cause electrical and physical damage. Therefore,
use the measurement instrument only in electrical environments for which the
instrument is rated.
The measurement categories correspond to the overvoltage categories of the
IEC60664 standards. Working voltages stated in context with measurement cate-
gories are always specified as effective voltages V (RMS) against earth ground.
1.3
Pollution Degrees
The pollution degree classifies the amount of dry pollution and condensation that
may occur in the environment. Products must be used only in the environment for
which they are rated.
●
Pollution Degree 1:
No pollution or only dry, nonconductive pollution occurs. The pollution has no
effect. Products of this category are generally encapsulated, hermetically
sealed, or used only in clean rooms.
●
Pollution Degree 2:
Normally only dry, nonconductive pollution occurs. Occasionally a temporary
conductivity that is caused by condensation must be expected. Temporary
Pollution Degrees
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