GF333B Three phase portable multifunction energy reference standard meter

three phase reference standard meter

GF333B is a portable reference standard meter used to test three phase meters and single phase meters, it designed to work both in the field and in the laboratory.



  • High accuracy up to 0.05%
  • Wide testing range: voltage 5V-480V, current 1mA-120A
  • Testing type: 3 phase 4 wire, 3 phase 3 wire
  • Testing mode: active power, reactive power, apparent power
  • Harmonic analysis function
  • Waveform display function
  • Vector diagram function
  • Energy accumulating function
  • Internal pulse input port, testing meter’s error directly


Electrical parameters 
Accuracy 0.05%
Voltage supply 220V±10% or 110V±10%, 50/60Hz
Voltage measurement 
Range 5V-480V
Error ±0.02% (50V-480V), ±0.05% (5V-50V)
Display range 5.000000V-480.0000V
Harmonic 2nd-63st
Current measurement 
Range 1mA-120A
Error ±0.02% (0.2A-120A), ±0.05% (1mA-0.2A)
Display range 1.000000mA-120.0000A
Power measurement 
Active power ±0.02% (0.2A-120A)
±0.05% (0.01A-0.2A)
±0.1% (0.001A-0.01A)
Reactive power ±0.05% (0.2A-120A), ±0.1% (0.001A-0.2A)
Apparent power ±0.05% (0.2A-120A), ±0.1% (0.001A-0.2A)
Energy error 
Active energy ±0.02% (0.2A-120A)
±0.05% (0.01A-0.2A)
±0.1% (0.001A-0.01A)
Reactive energy ±0.05% (0.2A-120A), ±0.1% (0.001A-0.2A)
Apparent energy ±0.05% (0.2A-120A), ±0.1% (0.001A-0.2A)
Phase measurement 
Range 0°-360°
Error ±0.005°
Display range 0.0001°-359.99°
Frequency measurement 
Range 45-65Hz
Display range 45.0000-65.0000
Accuracy 0.002Hz
Power Factor measurement 
Range -1.0 ~ 0 ~ +1.0
Resolution 0.0001
Accuracy 0.0005
Energy pulse 
High frequency output(CH) 12000Hz
Low frequency output(CL) 5000Hz
Pulse ratio 1:1
Output level 5V
Input level 5V
Input frequency Max. 1MHz
Mechanical parameters 
Dimensions (W×H×D) (mm) 480×138×486
Weight (kg) 10
Environmental conditions 
Ambient temperature -10°C to 45°C
Influence of external fields ≤0.05 %/mT
Relative humidity 10%-80%

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