8
IM 701946-01EN
1 The product is for measurement category II (CAT II). Do not use it with measurement category III
(CAT III), nor measurement category IV (CAT IV). When using devices or accessories with different
measurement categories, the lower measurement category applies. See below for definitions of
measurement categories.
2 Pollution degree refers to the degree of adhesion of a solid, liquid, or gas which deteriorates
withstand voltage or surface resistivity. Pollution Degree 2 applies to normal indoor atmospheres
(usually with only non-conductive pollution).
3 For conformity to environmental regulations and/or standards other than EU, contact your nearest
Yokogawa office (PIM 113-01Z2).
Definitions of Measurement Categories
Measurement Category “O” (Other)
It applies to measurement of a circuit that is not
connected directly to the main power source.
Measurement Category II (CAT II
)
It applies to measurement of electrical equipment
that is powered through a fixed installation such
as a wall outlet wired to a distribution board and
measurement on such wiring.
Measurement Category III (CAT III)
It applies to measurement at the distribution level,
that is, building wiring, fixed installations.
Measurement Category IV (CAT IV)
It applies to measurement at the primary supply
level, that is, overhead lines, cable systems.
Voltage Derating
CAUTION
As the frequency of the input signal increases, the maximum
input voltage of the probe decreases. See Specifications for the
appropriate input voltage.
French
ATTENTION
Lorsque la fréquence du signal d’entrée augmente, la tension
d’entrée maximale de la sonde diminue. Voir les spécifications
pour la tension d’entrée appropriée.
Frequency [Hz]
Am
pl
itu
de
A
C
rm
s
[V] s
in
us
Typical Voltage Derating
0
100
200
300
400
100 k
1 M
10 M
100 M
1 G
