GF312B2 Portable Three-Phase kWh Meter On-Site Calibrator is the newest product produced by our company by widely visiting users and referring to the advantages of the same kind of products home and abroad. The measured part of the product adopts high speed A/D transmission to send DSP to conduct digital processing, which largely improves measured degree of accuracy and stability. Central processing part adopts 32-bit ARM embedded technology to make instrument interface novel, function abundant, operation distinct and easy, and performance steady. Class of accuracy: Class 0.05% , 0.02%.
1. 7″ true color TFT light LCD with 800 X 480 resolution ratio is adopted. On the screen show all measurement parameters, vector diagram, degree of harmonic distortion and checking parameter setting. Interface need not be changed over to realize checking the electric energy meter error.
2. Touch screen and buttons can be operated more conveniently and quickly.
3. Voltage, current, power, phase and frequency can be measured at the same time and error calibrated; besides, voltage and current (between 1A and 5A) can automatically change gears.
4. Actual loading calibration of watt-hour meters with three-phase four-wire, three-phase three-wire and various vat-hour meters (Q90, Q60);
5. Provided with fundamental harmonic measurement mode to realize calibration of fundamental meter;
6. Provided with two electric energy pulse input ports, which can at the same time calibrate two meters (main and auxiliary meters), or active, reactive errors of a multi-function meter, also can calibrate watt-hour meter and vat-hour meter;
7. Output electric energy constant can be set for convenience of calibrating the instrument.
8. The function of rounding error is provided and it can automatically conduct pursuant to accuracy class of the calibrated electric energy meter.
9. Measure CT variable ratio, ratio error, angle error and polarity;
10. Ambient temperature and humidity can be measured.
11. 0～51 times of harmonics can be analyzed. And harmonic content, amplitude and relative fundamental phase can be measured every time, which are shown in column diagram with amplification function convenient for observation and analysis.
12. Display waveform and have amplification function.
13. Users can, according to demand, select clamp meter with 5A, 10A, 100A, 200A, 500A, 1000A, 2000A current span or flexible coil mutual inductor to realize actual loading measurement of composite error of low voltage electric energy metering device. 3 sorts of clamp meters can be provided at the same time.
14. Current switching mode can be automatically identified and user doesn’t need to set.
15. Electric energy accumulative function is available. Electric energy meter on-site counter test, register error and calibration constant can be executed.
16. Display a wide range of vector diagram to meet habits of various users.
17. On-site rapid discrimination from three-phase three-wire and three-phase four-wire false wiring can be realized and corrective steps are given. Corrective coefficient and electric quantity compensation can be calculated in the condition of false wiring.
18. Support bar code input, thereby, field may realize exemption from inputting calibration parameter to rapidly calibrate error. (Users select)
19. Support digital input, letters input, symbols input ,English input and Chinese characters input.
20. Have storage and uploading function of all kinds of measurement data and support RS232, USB communication. Measurement data can be exported and imported through USB flash disk. Calibration plan downloaded by PC machine may also be accepted to rapidly find out calibration parameter shown on the meter in the field by a number of conditions (asset number, user ID and user name). Measurement data from 1000 meters can be stored.
21. Equipped with hard clock directly displaying the current time and data;
22. Have RS-485 interface which can read electric quantity on site and conduct communication and inspection of electric energy meter.
23. Extended measurement: PT secondary voltage drop, PT secondary load, CT secondary load.
24. GPS interface is reserved, which can conduct timing and time service for multi-function meter.
25. Portable and sealed engineering plastics chassis is adopted to protect against rain, dust and earthquake. The whole machine has such features as small in size, light and simple structure, low power consumption (≤13VA), light weight (4kg) and easy carrying etc.
26. Operating range of power supply: 45～450V, there are two modes of connection--inscribe and circumscribed, strong adaptability, safe and reliable.
1. Class of accuracy for voltage, current, active power and active electric energy (built-in current transformer): Class 0.05% , 0.02%.
2. Class of accuracy for reactive power and reactive electric energy: Class 0.1.
3. Voltage input: 30V～560V, 60V, 120V, 240V, 480V Shift Four, automatic gear shift.
4. Current input: built-in current transformer: 0.05～12A, automatic gear shift.
Clamp meter: 5A, 10A, 20A, 100A, 200A, 500A, 1000A and 2000A for selection.
5. Fundamental Error
|
Load Current
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Power Factor
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Fundamental Margin of Error (%)
|
|
0.05Ib
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1.0
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±0.1
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0.01Ib~Imax
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1.0
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±0.05
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|
0.1Ib
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0.5（L）)；0.8（C）
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±0.15
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|
0.2Ib
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0.5（L）)；0.8（C）
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±0.075
|
|
0.5Ib~ Imax
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0.5（L）)；0.8（C）
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±0.05
|
6. Phase measurement range: 0.000°～360°（or 0.000°～±180°）, Resolution ratio: 0.001°. Accuracy: ±0.05°/±0.02°（current input>10%Ib）
7. Frequency measurement: resolution ratio: 0.001H, Accuracy: ±0.01Hz.
8. Input electric energy pulse: TTL level, max. frequency ≤２ＭＨz.
9. Output electric energy pulse: rated range is f=60KHz as automatic constant. It can be set between 1～250000 as hand constant.
10. Temperature coefficient: 5ppm.
11. Low voltage input impedance: >750KΩ;
12. Current input impedance: <0.05Ω;
13. Input signal frequency: 45～65Hz;
14. Accuracy for PT secondary voltage drop (90%～110%Un): angle error 0.2´; ratio error 0.02%;
15. Accuracy for PT, CT secondary load measurement: Class 1.0
Measurement range: admittance: 1.0～99.99（ms）;
Impedance: 0.1～8（Ω）;
16. Accuracy for clock measurement: ±0.5ppm; 0.05s/d;
17. Power supply: frequency 50Hz, range 45～450V;
18. Power consumption: ≤13VA;
19. Operating ambient temperature; -10℃～40℃ humidity: 30～80%RH;
20. Volume: 370mm L×260mm W×135mm H;
21. Dead weight of instrument: 4Kg.
