Three Phase Multifunctional Standard CL3112D

The CL3112D is a high-precision, multifunctional, cost-effective three-phase standard energy meter developed in compliance with the Recommendation R46 issued by the International Organization of Legal Metrology (OIML). It is designed for the testing and calibration of energy meters, power terminals, and other electrical measuring instruments. It can also be used for the traceability of Class 0.05 and lower-grade energy meter verification devices as well as other metrological equipment.

Reference Standard Meter CL3112D, front view

Reference Standard Meter CL3112D, rear view

Function

It can measure the distortion factor of voltage and current for each phase, as well as analyze the 2nd to 64th harmonics.
It is capable of measuring all waveforms specified in Recommendation R46, including peak-top waves, flat-top waves, odd harmonics, subharmonics, high-order harmonics, and zero-crossing waves.

Technical Parameters

Voltage Measurement
Voltage Range	30 V … 720 V
Voltage Accuracy	± 0.02% (30 V ≤ U ≤ U max)
Current Measurement
Current Range	0.3 mA … 120 A
Current Accuracy	± 0.02% (10 mA ≤ I ≤ 120 A), ± 0.05% (1 mA ≤ I ≤ 10 mA), ± 0.2% (0.3 mA ≤ I ≤ 1 mA)
Phase Measurement
Phase Range	0.00° … 359.99°
Phase Accuracy	± 0.01 (I ≥ 10 mA, U ≥ 30 V)
Frequency Measurement
Frequency Range	40 Hz … 70 Hz
Frequency Accuracy	± 0.01 Hz
Power Factor Measurement
Power Factor Range	– 1.0 … 0 … + 1.0
Power Factor Accuracy	± 0.0005
Power Measurement
Active / Reactive / Apparent Power Accuracy	± 0.02% (30 V ≤ U ≤ U max, 10 mA ≤ I ≤ I max, PF ≥ 0.5)
Electrical Energy Measurement
Active / Reactive Energy Meter Accuracy	± 0.02% (30 V ≤ U ≤ U max, 10 mA ≤ I ≤ I max, PF ≥ 0.5)
Pulse Inupt / Pulse Output	0 … 50 KHz
Harmonic Power / Energy	Harmonic order 2nd – 20th: ± 0.2% of reading + 0.1% of range; Harmonic order 21st – 64th: ± 0.6% of reading + 0.15% of range
Other Indicators
Operating Power Source	AC 220 V ± 10%, 50 Hz ± 5%
Power Consumption / Warm-up Time	< 120 VA / < 30 mins
Dimensions (mm)	(W × H × D): 485 × 133 × 500
Weight	Approx. 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

Constant

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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published: 13 Jan, 2026