GF312D Handheld Three Phase Standard Reference Meter

three phase reference meter

The instrument is a precision AC energy meter testing instrument, mainly used to test three phase energy meter error on site and measure various of AC parameters.



  • Three phase active or reactive electricity energy meter;
  • Calibrate three phase, single phase, active or reactive meter error;
  • Measure U(voltage) of three phase or single phase;
  • Measure I(current) of three phase or single phase;
  • Measure active power of three phase or single phase;
  • Measure reactive power of three phase or single phase;
  • Measure apparent power of three phase or single phase;
  • Measure power factor of three phase or single phase;
  • Measure phase angle between voltage and current;
  • Measure frequency of power line;
  • Display vector diagram;
  • Display waveform of U and I;
  • Analyze and display content of harmonic of U and I;
  • Store and display measured data;
  • Optional 5A, 20A, 100A, 500A, 1000A, 2000A, 3000A current clamp;
  • Measure CT variable ratio;
  • Measure the ratio or lag-angle of low-voltage transformer.
  • Adopt 32 bit ARM processor, multi-channel 16 bit precision A/D convertor, high resolution TFT color LCD;
  • Inner equipped with 0.01% wide-range current transformer and can be equipped with various type current clamps, wide range of measurement and high veracity.
  • Low consumption circuit design, high energy Li batter supply, intellectual power management software, which make the instrument can continuously work up to 10 hours.


Electrical parameters 
Accuracy class  0.05%, 0.1%
Resolution 6”TFT (640×480)
Power supply  220V±10%, 50/60Hz
Li-polymer battery (size (mm): 110x51x16, nominal output voltage: 7.2V, capacity: 5000mAh)
Power line supply (U1, UN), 85V-265V 50/60Hz
Communication port RS232
Test voltage 
Range 5-480V
Error ±0.05% (30V-480V)
±0.1% (5V-30V)
Harmonic 2nd-63st
Test current 
Range (direct connection) 5mA-20A
Error (direct connection) ±0.05% (100mA-20A)
±0.1% (10mA-100mA)
Range (clamp CT) 10mA-3000A
Error (camp CT) ±0.2% (100mA-100A)
±0.5% (100A-3000A)
Harmonic 2nd-63st
Power measure error 
Active power (direct connection) ±0.05% (0.1A-20A)
±0.1% (0.01A-0.1A)
Reactive power (direct connection) ±0.1% (0.1A-20A)
Energy measure error 
Active energy (direct connection) ±0.05% (0.1A-20A)
±0.1% (0.01A-0.1A)
Reactive energy (direct connection) ±0.1% (0.1A-20A)
Phase angle 
Range 0°-360°
Resolution 0.01°
Error ±0.05°
Range 45-65Hz
Resolution 0.001Hz
Error 0.002Hz
Pulse input 
Input channel 2
Input level 5-24V
Input frequency Max. 2MHz
Pulse output 
Energy constant 180000imp/kWh, 1800imp/kWh, 180imp/kWh
Pulse ratio 1:1
Output level 5V
Vector diagram Yes
Waveform Yes
Energy accumulation Yes
Communication with PC Yes
Mechanical parameters 
Instrument dimensions (W×H×D) (mm) 220×138×61
Instrument Weight (kg) 1.7
Carry case dimensions (W×H×D) (mm) 450×320×185
Carry case  (kg) 8.5
Environmental conditions 
Ambient temperature -10°C to 55°C
Relative humidity 15%-85%

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