GF312D Handheld Three Phase Standard Reference Meter

three phase reference meter

The Three Phase Reference Standard Meter (GF312D) is portable meter test equipment from GFUVE Electronics. The main objective of this device is to calibrate the errors for three phase & single phase energy meters i.e. the meter under test (MUT). The GF312D supports both static and electro-mechanical types of energy meters. It can also be used to measure the voltage, current, power, energy, power factor, harmonic etc of the meter under test. It has an 6 inch color LCD display, 24pcs keys that makes it easy for the user to operate the GF312D reference meter. It can be interfaced with the PC for data management analysis. It has the capability of storing test results.


The reference standard meter supports various current modes for checking energy meter error. The high accuracy (0.05) mode operates for direct current up to 20A. The clamp on CTs mode accuracy is better than 0.2 class. It can also be used to determine the current transformer ratio when tested simultaneously on the primary and secondary sides. It also supports flexible current probe for very high currents like 2000A or 3000A.

Features and Functions

  • Display vector diagram;
  • Measure CT variable ratio;
  • Display waveform of U and I;
  • Store and display measured data;
  • Measure frequency of power line;
  • wide range of measurement and high veracity;
  • Measure phase angle between voltage and current;
  • Measure U(voltage) of three phase or single phase;
  • Measure I(current) of three phase or single phase;
  • Analyze and display content of harmonic of U and I;
  • Measure power factor of three phase or single phase;
  • make the instrument can continuously work up to 10 hours;
  • 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 the ratio or lag-angle of low-voltage transformer;
  • Testing Three phase active or reactive electricity energy meter;
  • Optional 5A, 20A, 100A, 200A, 500A, 1000A, 2000A, 3000A current clamp;
  • Calibrate three phase, single phase, active or reactive meter error;
  • 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%, 0.2%
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, USB
Test voltage 
Range 0-480V
Error ±0.05% (30V-480V)
±0.1% (0V-30V)
Harmonic 2nd-63st
Test current 
Range (direct connection) 1mA-20A
Error (direct connection) ±0.05% (100mA-20A)
±0.1% (10mA-100mA)
Range (clamp CT) 10mA-3000A
Clamp CTs optional 5A, 100A, 200A, 500A, 1000A, 2000A, 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
Test meter Type 1P2W, 1P3W, 3P3W, 3P4W
CT ratio test Yes
CT PT programmable Yes
Check wiring Yes
smart optical sampler 1PC
Data storage 500sets
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%
The Height of above sea level ≤3000m

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