3-10
IM CA71-E
■ Measurement Category
Measurement Category of Main unit
WARNING
The instrument is designed for measurement category III.
Do not use the CA51 or CA71 for measurements in location that fall
under Measurement Category IV.
French
AVERTISSEMENT
L'instrument est conçu pour la catégorie de mesure III.
Ne pas utiliser le CA51 ou CA71 pour des mesures dans un endroit qui se
situe dans la catégorie de mesure IV.
Measurement
Category
Description
Remarks
O
(None, Other)
Other circuits that are not directly
connected to MEAINS.
Circuits not connected to
a mains power source.
CAT II
For measurement preformed on
circuits directly connected to a
low-voltage installation.
Appliances, portable
equipment, etc.
CAT III
For measurement preformed in a
building installation.
Distribution board,
circuit breaker, etc.
CAT IV
For measurement preformed at the
source of a low-voltage installation.
Overhead wire,
cable systems, etc.
3. Before Starting Source/Measurement
