8 Specifications
126
Quick Start Manual
Input Specifications
Measurement line type
One single-phase 2-wire (1P2W), single-phase 3-wire (1P3W),
three-phase 3-wire (3P3W2M,3P3W3M) or three-phase 4-wire
(3P4W) plus one extra input channel
Input channels
Voltage:Four channels U1 to U4 (extra channel U4 can mea-
sure AC or DC)
Current:Four channels I1 to I4
Input methods
Voltage:Isolated inputs and differential operation
Between U1,U2 and U3: these channels are not isolat-
ed from one another
Between U1 to U3 and U4: channel U4 is isolated
Current:input is isolated by the clamp-on sensor (voltage input)
Input resistance
(50/60 Hz)
Voltage:4 MΩ ±10% (differential input)
Current:200 kΩ ±10%
Measurement method
Simultaneous digital sampling of voltage and current
PLL synchronization (during instantaneous low period of PLL
synchronization source, switches to a fixed clock, with no sam-
pling gap during switching)
PLL synch channel
source
One of voltages U1, U2 or U3
PLL synch frequency
range
42.5 to 69 Hz
Sampling frequency
For calculations (including DC measurements):
256 per cycle (50, 60 Hz)
256 per 8 cycles (400 Hz)
For harmonic and inter-harmonic analysis:
2048 per 10 cycles (50 Hz)
2048 per 12 cycles (60 Hz)
2048 per 80 cycles (400 Hz, high frequency only)
For transient overvoltage (impulse): 2 MHz
A/D converter
resolution
For calculations (including DC measurements): 16 bits
For transient overvoltage (impulse): 12 bits
Compatible clamp
sensors
0.5 Vrms output or more for full-scale current (0.5 Vrms recom-
mended) Output-to-input ratios of 0.1, 1, 10 or 100 mV/A
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