1General
Field calibrator of multi-function electric energy meter is a high-precision testing instrument developed and manufactured by our company with an integration of AC sampling electric parameter measurement, calibration of electric energy meter and wiring judgment. High-precision and high-linearity voltage transformer and current transformer are equipped for the instrument so that the measuring accuracy of each parameter is high. Meanwhile, clamp type current transformer is provided in order to facilitate field wiring which can be made directly without disconnection of current circuit.
Display of the instrument is large screen color LED. Prompt message in English is provided for English operation interface. The LCD interface can display multi parameters with friendly HMI. The display of vector graph and wiring inspection provides reliable basis for verification of correctness of electric circuit. The operation will be made via full-touch conductive silicone keyboard. The hand feel of operation is good and the operation is easy to learn. High-capacity data memory without data loss when there’s power failure is built in the instrument, which can save field calibration data. At most 10,000 groups of field verification results can be saved. Background microcomputer management software (optional accessory) can be provided for uploading of results to computer so that micro computerized management can be realized.
The shell of instrument is made of engineering plastic manufactured using die designed independently by our company. The appearance of instrument is nice while the instrument is practical. The operation of field testing is easy.
2 Main Functions & Features
1. Comprehensive errors of metering equipment can be tested by online real load when there’s no power failure or change of metering circuit and the metering equipment is off.
2. It can measure accurately voltage, current, active power, reactive power, phase angle, power factor, frequency and other electric parameters of electric energy meter.
3. It can display vector diagramof measured voltage and current. The user can conclude if the wiring of metering equipment is correct by analyzing of vector diagram. Meanwhile, it can judge automatically 48 wiring ways when it’s three-phase three-wire.
4. Split type transformer can be used for measurement in current circuit, and the measurement can be made without disconnection of current circuit by operators. The measurement is easy and safe.
5. It can verify voltmeter, ampere meter, wattmeter, phase meter and other indication instruments as well as each type of active and reactive electric energy meters of three-phase three-wire, three-phase four-wire and single phase of 1A and 5A.
6. Verification of electric energy meter can be made by photoelectric sampler , manual way and pulse and etc.
7. It can display the wave forms of single phase voltage and current and it can also display three-phase voltage and current wave forms at the same time.
8. It has calendar and clock functions, so the real-time date and time can be displayed. It can save testing data and results at the time of field verification and to upload them to computer by serial port. Thus micro computerized management of data is realized by background management software (optional accessory).
9. It has small volume and light weight, so it’s convenient to carry. It can not only be used for field measurement, but also can work as standard measurement equipment of laboratory.
3Main Technique Specification
Measuring range of voltage:
57.7V,100V,220V,380V，
switched automatically.
Measuring range of current:
5mA,100mA（for clamp transformer）
1A,10A （direct connection)
Input range： 0～120% Resolution： <0.005%RG
Measuring accurancy of voltage\current\active power\energy：
±（0.03%RD+0.02%RG）
Measuring accurancy of reactive power and reactive energy：
±（0.06%RD+0.04%RG）
Measuring accurancy of active power and active energy：
( by the clamp transformer access )
0.2%RG
At rated power, the pulse output frequency can be set between 10kHz and 2MHz
Energy pulse constant：1～999999/kWh；
Cycle：1～99
Accurancy of measuring phase angle：
0.05°（direct connection）
Resolution： 0.01°
Accuracy of power factor measurement：
±0.0005（direct connection）
Resolution： 0.00005
Frequence range： 40～65Hz
Accurancy： 0.01Hz
Resolution： 0.001Hz
Measuring harmonic and distortion：
（Limited to power frequency range）
Harmonic order： 2～31 order
Measuring harmonic error：
±（10%RD+0.1%） RD:Harmonic content reading
Measuring distortion error：
±（10%RD+0.1%） RD:distortion reading
Voltage supply：
single phase 220V±10%，50Hz±5%
Operating environment：
Ambient temperature - 5°C～45°C，
Relative humidity 35%～85%RH
Dimensions (W×H×D) (mm) 340×220×130mm3,
Weight (kg) about 6kg.
