Hioki 3197 - Page 148

8.1 General Specifications
140
Measurement Input Specifications
Wiring configurations
Single-phase 2-wire (1P2W), single-phase 3-wire (1P3W), three-
phase 3-wire (3P3W2M and 3P3W3M ), three-phase four-wire
(3P4W and 3P4W2.5E), Neutral current calculation and display
Measurement line
frequency
Autoselecting (50/60 Hz)
Measurement input
method
Voltage: isolated inputs and differential inputs (not isolated between
U1, U2, U3 and N)
Current:
isolated inputs by clamp-on sensors
Input impedance
(50/60 Hz)
Voltage: 3.2 MΩ ±10% (differential inputs)
Current: 200 kΩ
±10%
Max. allowable input
voltage
Voltage input section: 780 V AC (1103 Vpeak)
Current input section:
1.7 V AC (2.4 Vpeak)
Maximum rated voltage
to ground
Voltage input section:
600 V AC (50/60 Hz) (Measurement Category III)
300 V AC (50/60 Hz) (Measurement Category IV)
Current input section: per clamp-on sensors used
Basic Measurement Specifications
Measurement method
Simultaneous digital sampling of voltage and current
A/D converter resolution
16 bits
Sampling frequency
10.24 kHz per channel (204.8 points per cycle at 50 Hz, 170.67 points
per cycle at 60 Hz)
Calculation processing
• Voltage (1/2)
Alternately calculated for every full cycle at half-cycle intervals,
c
ontinuous measurement without gaps (interpolation available)
• Current (1/2)
Calculated every half-cycle, continuous measurement without
gap
s (interpolation available)
• Rms (measurement values other than voltage (½), current (½) and
har
monic-related)
200 ms calculation of continuous measurements with no gaps (with
in
terpolation)
• Harmonics
2048-point calculation of continuous measurements without gaps
(
10 cycles @50 Hz, 12 cycles @60 Hz)