Three-phase Reference Standard Meter CL3112D

The three-phase reference standard meter is made according to the R46 standard published by the OIML (International Organization of Legal Metrology), which is high precision, multifunctional and high performance.
It is used for tests and calibrations of gateway energy meters and high-level calibrators.

Reference Standard Meter CL3112D, front view
Reference Standard Meter CL3112D, front view
Reference Standard Meter CL3112D, rear view
Reference Standard Meter CL3112D, rear view

Function

  • Tests of voltage, current, power, phase angle, power factor and frequency
  • Tests of the distortion of each phase voltage and current, and measure and analyze the 2nd – 64th harmonics
  • Tests of the peaked waveform, quadriform waveform, sub-harmonics, high-order harmonics and other waveforms specified in R46.
  • Test of fundamental active power / electric energy, total harmonic active power / electric energy and full wave
  • Tests of the stability and asymmetry of each electric quantity
  • 7-inch color touch screen

Specification

ItemParameter
Test voltage, phase-neutral30 V – 720 V
Voltage ranges60 V, 120 V, 240 V, 480 V, 720 V
Harmonics accuracy, voltageOrder: 2nd – 20th, ±0.2 % reading + ±0.05 % range
Order: 21st – 64th, ±0.3 % reading + ±0.05 % range
Test current1 mA – 120 A
Current ranges10 mA, 20 mA, 50 mA, 0.1 A, 0.2 A, 0.5 A, 1 A, 2 A, 5 A, 10 A, 20 A, 50 A, 100 A
Current accuracy1 mA – 25 mA: 240 ppm reading + 160 ppm range
25 mA – 100 A: 120 ppm reading + 80 ppm range
Harmonics accuracy, currentOrder: 2nd – 20th, ± 0.2 % reading + ± 0.05 % range
Order: 21st – 64th, ± 0.3 % reading+ ± 0.05 % range
Harmonics accuracy, powerOrder: 2nd – 20th, ± 0.2 % reading + ± 0.1 % range
Phase shift±180°
Phase shift accuracy±0.02°
Frequency range45 Hz – 65 Hz
Frequency accuracy0.01 Hz
Power factor range-1 … 0 … +1
Power factor accuracy5 ppm
Impulse input0 -100 kHz
Impulse output0 – 50 kHz
Operating power supplyAC 220 V ±10 %, 45 Hz – 65 Hz
Power consumption< 30 VA
Operating temperature23 °C ±10 °C
Storage temperature-5 °C – 50 °C
Voltage measurement accuracy < 0.01 %
Voltage measurement drift < 25 ppm/year
Current measurement accuracy, 1 mA…25 mA≤ 0.1 %
Current measurement accuracy, ≥ 25 mA< 0.01 %
Current measurement drift < 55 ppm/year
Power measurement accuracy P, Q, S< 0.02 % (current ≥ 25 mA and λ  = 1)
Power measurement drift< 80 ppm/year
Phase angle accuracy< 0.01° (current ≥ 25 mA and voltage > 30 V)
Phase angle resolution0.0001°
Frequency accuracy0.01 Hz
Frequency resolution0.0001 Hz
Voltage temperature drift< 2.5 ppm/K
Current temperature drift< 5 ppm/K
Power temperature drift< 7.5 ppm/K
Preheating time15 minutes
Surge voltage protectionClass C
Installation categoryCATIII
Pollution degree2
Relative humidity≤ 85 % RH, not condensate
Dimensions (W x H x D)500 mm × 133 mm × 485 mm
WeightApprox. 19 kg
Meter Constant Table

CL3112D power constants
  60 V 120 V 240 V 480 V 600 V
0.01 A 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109
0.02 A 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109
0.05 A 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109 1.8 x 109
0.1 A 1.8 x 109 1.8 x 109 1.8 x 109 1.25 x 109 1.0 x 109
0.2 A 1.8 x 109 1.8 x 109 1.25x 109 6.25 x 108 5.0 x 109
0.5 A 1.8 x 109 1.0 x 109 5.0 x 108 2.5 x 108 2.0 x 108
1 A 1.0 x 109 5.0 x 108 2.5 x 108 1.25 x 108 1.0 x 108
2 A 5.0 x 108 2.5 x 108 1.25 x 108 6.25 x 107 5.0 x 107
5 A 2.0 x 108 1.0 x 108 5.0 x 107 2.5 x 107 2.0 x 107
10 A 1.0 x 108 5.0 x 107 2.5 x 107 1.25 x 107 1.0 x 107
20 A 5.0 x 107 2.5 x 107 1.25 x 107 6.25 x 106 5.0 x 106
50 A 2.0 x 107 1.0 x 107 5.0 x 106 2.5 x 106 2.0 x 106
100 A 1.0 x 107 5.0 x 106 2.5 x 106 1.25 x 106 1.0 x 106
The table refers to the automatic settings. It’s valid for 3 wire- and 4 wire measuring mode.

The output frequency for end of range in voltage/current pair with three phase connection is 50 kHz. The power pulses are on TTL/CMOS level. The burden capacity is > 20 mA.

Calculation formulas

Frequency

frequency calculation
f = frequency
UR = voltage range
IR = current range
c = reference meter constant

Constant

constant calculation

The meter constants can be set in the settings menu or selected automatic. Setting range is 1 i/kWh to 2 x 109 i/kWh.



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