Hioki CM3289, Instruction Manual

Page: 26 / 104

EN-16
Specifications
Maximum rated
voltage to earth
• Jaw, CT6280
600 V AC (Measurement category III),
300 V AC (Measurement category IV)
(Anticipated transient overvoltage:
6000 V)
• Voltage measurement terminal
600 V AC (Measurement category II),
300 V AC (Measurement category III)
(Anticipated transient overvoltage:
4000 V)
AC
measurement
method
True RMS measurement method
Display update
rate
400 ms±25 ms
Noise rejection
characteristics
NMRR DCV −40 dB or more
(50 Hz/60 Hz)
CMRR DCV −100 dB or more
(50 Hz/60 Hz,
1 k Ω unbalance)
ACV −60 dB or more
(50 Hz/60 Hz,
1 k
Ω
unbalance)
But, −45 dB or more
for 600 V range.
Crest factor For 2500 counts or less, 2.5
Reduces linearly to 1.5 or less at 4200
counts
Zero-display
range
5 counts (AC current measured with jaw
or flexible loop)
Effects of
conductor
position
CM3289: within ±5.0% Specified with a
11-mm-diameter cable
CT6280: within ±5.0%
(At any positions, based on the center
of sensor)