GF333 multifunction AC DC digital reference multimeter can be used as a calibration device standard meter in the laboratory, also as a testing calibrator in metrology testing center of grid corporation, power company and metrological department in power plant, national levels of metrological service, quality inspection departments, research institutes, tertiary institutions, industrial and mining enterprises, electric energy meter and electrical instrument production enterprises etc. The model GF333 high precision AC DC reference meter can test three phase ac voltage, current, phase angle, active power, reactive power, apparent power, energy, power factor, frequency and harmonic, also test DC voltage, DC current and DC power and transducer. The digital reference meter fully meet ISO17025 standard in the electrical laboratory.
Electrical parameters | |
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Accuracy class | 0.02%, 0.05% |
Power supply | AC 220 V±10% or 110 V±10%, 50/60Hz |
Power consumption | <30VA |
Warming-up time | <30min |
Voltage measurement | |
U1, U2,U3 | 6.25V, 12.5V, 25V, 50V, 100V, 200V, 400V, 800V (switch automatically), max 1000V |
Range | (0-120%)RG |
Resolution | 0.01%RG |
Accuracy | 0.02%RD or 0.05%RD |
Current measurement | |
I1, I2, I3 | 0.25, 0.5, 1, 2.5, 5, 10, 25, 50, 100A(switch automatically) |
Range | (0-120%)RG |
Resolution | 0.01%RG |
Accuracy | 0.02%RD or 0.05%RD |
Power measurement | |
Active accuracy | 0.02%RD or 0.05%RD |
Reactive accuracy | 0.05%RD or 0.1%RD |
Apparent accuracy | 0.02%RD or 0.05%RD |
Energy measurement | |
Active accuracy | 0.02%RD or 0.05%RD |
Reactive accuracy | 0.05%RD or 0.1%RD |
Phase measurement | |
Range | 0.00°-359.99° |
Resolution | 0.001° |
Accuracy | 0.02° (voltage ≥50V and current ≥250mA) |
Frequency measurement | |
Range | 45-65Hz |
Resolution | 0. 001Hz |
Accuracy | 0.001Hz |
Power Factor measurement | |
Range | -1.00000 ~ 0 ~ +1.00000 |
Resolution | 0.0001 |
Accuracy | 0.0005 |
Electric energy pulse output | |
Pulse constant range | 1-2880000000 |
Output frequency of max. pulse | 600 kHz |
Load capacity | >2mA |
Default pulse output frequency | 10kHz-600kHz |
Energy pulse Input | |
Input range of pulse constant | 600-700000 |
Setting range of test pulse | 1-999999999 |
Max. pulse receiving frequency | 2MHz |
Pulse input level | 5V |
Voltage/current harmonics measurement | |
Times | 2-31 |
Error | 0.05% |
Distortion degree error | 0.05% |
Transducer measurement | |
DC voltage range | ±1, ±5, ±10, ±20 V |
Accuracy | 0.01% |
DC current range | ±1, ±2.5, ±5, ±10, ±20mA |
Accuracy | 0.01% |
Ripple error | 1% |
DC measurements (option) | |
DC voltage | 50V, 100V, 200V, 400V, 800V (switch automatically), max 1000V |
Range | (0 -120%) RG |
Resolution | 0.01% RG |
Accuracy | 0.02% RD |
DC current | 0.1A, 0.3A, 1A, 3A, 10A, 30 A(switch automatically) |
Range | (0-120%) RG |
Resolution | 0.01% RG |
Accuracy | 0.02% RD |
Function | |
LCD Display | 6.5 inch color disply |
Vector diagram | Yes |
Waveform | Yes |
Energy accumulation | Yes |
Harmonics measurement | Yes |
Distortion degree | Yes |
Self-calibration | Yes |
Data storage | Yes |
Keys | Yes, 18pcs |
PC software | Optional |
Communication port | RS232 |
Standard | |
Standard | IEC 62053-21,22, 23; IEC 60736; IR46; ANSI C12.20-2022; JJG 597-2005; JJG596-2012; JJG 1085-2013; JJF 68-2019; DL/T 826-2002; DL/T 1478-2015; DL/T 448-2016 |
Safety | |
Isolation protection | IEC 61010-1:2001 |
Measurement Category | 300 V CAT III, 600 V CAT II |
Degree of protection | IP40 |
Declaration of conformity | CE & CNAS certified |
Mechanical parameters | |
Dimensions (W×H×D) (mm) | 440×360×160 |
Weight (kg) | 10 |
Environmental conditions | |
Operating temperature | 10°C to 30°C |
Storage temperature | -20°C to 65°C |
Relative humidity | ≤85% |
Influence of external fields | ≤0.05 %/mT |
Temperature coefficient | ≤0.0005% /℃ |