The Multi-functional Power Meter Field Calibration Instrument is a high-precision testing device developed and designed by our company, integrating electrical parameter measurement, power meter calibration, and wiring judgment. This instrument is equipped with high-precision and high-linearity voltage transformers and current transformers, ensuring high accuracy in measuring various parameters. Additionally, it comes with clamp-on current transformers, making on-site wiring simple without the need to break the current loop, allowing for direct connection.

Key Features:

• Large Screen Color LCD Display: The instrument uses a large screen color LCD as the display, providing a full Chinese graphical operation interface with character prompts and multi-parameter display, offering a user-friendly human-machine interaction experience.
• Vector Diagram and Wiring Judgment: Displays vector diagrams and provides wiring judgment, offering reliable basis for checking the correctness of circuits.
• Touch-sensitive Conductive Silicone Keyboard: Features a touch-sensitive conductive silicone keyboard for comfortable operation, easy to learn and use.
• High Capacity Data Storage: Equipped with a large internal data storage that retains data even when power is lost. It can store up to 1000 sets of on-site calibration results. A backend management software is provided to upload the results to a computer, enabling computerized management.
• Engineering Plastic Enclosure: The instrument features an engineering plastic enclosure designed and molded independently by our company, ensuring the device is aesthetically pleasing and practical for on-site testing convenience.

The instrument is a high-precision testing device that integrates the calibration of electric energy meters, testing of electrical parameters, and detection of power quality issues such as waveform distortion, voltage fluctuation, and three-phase imbalance in the grid.

It can perform online real-load testing of the integrated error of metering equipment without power interruption, without changing the metering circuit, and without opening the metering device.

It accurately measures various electrical parameters including voltage, current, active power, reactive power, phase angle, power factor, frequency, etc., to calculate the measurement error of the test equipment loop.

An optional virtual load box allows for accurate meter measurements even when the user has no load or ultra-low load.

It can display vector diagrams of measured voltages and currents. Users can analyze these diagrams to determine the correctness of the metering equipment wiring. It automatically judges 48 types of wiring methods in three-phase three-wire connections and features an automatic supplementary electricity calculation function.

Current loops can be measured using clamp-on transformers, allowing operators to measure conveniently and safely without breaking the current loop.

It can calibrate instruments such as voltmeters, ammeters, wattmeters, phase meters, and various active and reactive energy meters in single-phase, three-phase three-wire, and three-phase four-wire configurations. It can simultaneously detect errors in both primary and secondary meters.

Calibration of energy meters can be performed using optical, manual, pulse, and other methods.

It analyzes the quality of AC power supplied from the public grid to the user end, measuring factors like frequency deviation, voltage deviation, voltage fluctuation, permissible three-phase voltage unbalance, and grid harmonics.

It displays single-phase voltage and current waveforms and can simultaneously show three-phase voltage and current waveforms.

Load fluctuation monitoring: analyzing the impact of various electrical devices on power quality under different operating conditions. Recording and storing parameters like voltage, current, active power, reactive power, apparent power, frequency, phase, etc.

Dynamic monitoring of power equipment adjustments and operational processes helps users address issues during the adjustment and commissioning phases.

An optional barcode scanner can automatically input meter barcodes.

It tests the 485 communication interface of energy meters and fulfills on-site calibration needs for multifunctional (smart) energy meters, capable of verifying demand errors based on pre-set demand periods and slip times in meters.

Features a perpetual calendar and clock function displaying real-time date and time. It saves test data and results during on-site calibration and can upload them to a computer via a serial port, with optional backend management software for computerized data management; it also includes a USB port for direct data transfer to a USB drive.

Utilizes a large-screen imported color LCD as a display, featuring a graphical Chinese operation interface with Chinese prompts and multi-parameter display, providing a friendly human-machine interaction interface.

Compact and lightweight for easy portability, suitable for both on-site measurements and use as a standard metrological device in laboratories.

1. Input Characteristics

• Voltage measurement range: 0~400V, with automatic range switching for 57.7V, 100V, 220V, and 400V.
• Current measurement range: 0~5A, with an internal transformer divided into a 5A (CT) range. Clamp-on transformers are available in six ranges: 5A (small clamp), 25A (small clamp), 100A (medium clamp), 500A (medium clamp), 400A (large clamp), and 2000A (large clamp) (medium and large clamps are optional).
• Phase angle measurement range: 0~359.999°.
• Frequency measurement range: 45~55Hz.

2. Accuracy

• Metering and calibration section:
• Voltage: ±0.05% (±0.1%)
• Current: ±0.05% (±0.1%) (clamp-on transformers ±0.5%)
• Active power: ±0.05% (±0.1%) (clamp-on transformers ±0.5%)
• Reactive power: ±0.3% (±0.5%) (clamp-on transformers ±1.0%)
• Active energy: ±0.05% (±0.1%) (clamp-on transformers ±0.5%)
• Reactive energy: ±0.3% (±0.5%) (clamp-on transformers ±1.0%)
• Frequency: ±0.05% (±0.1%)
• Phase: ±0.2°

3. Power Quality

• Fundamental voltage and current amplitude: Fundamental voltage allowable error ≤0.5% F.S.; fundamental current allowable error ≤1% F.S.
• Measurement error of phase difference between fundamental voltage and current: ≤0.5°
• Harmonic voltage content rate measurement error: ≤0.1%
• Harmonic current content rate measurement error: ≤0.2%
• Three-phase voltage unbalance error: ≤0.2%

4. Operating Temperature

• Operating temperature: -10°C to +40°C

5. Insulation

• ⑴ Voltage and current input terminals to the case insulation resistance ≥100MΩ.
• ⑵ The working power supply input terminal withstands a power frequency of 1.5kV (RMS) relative to the case for 1 minute test.

6. Standard Energy Pulse Constant

• Standard energy pulse constant: Internal transformer constant (FL) = 10000 r/kW•h,
• Clamp-on transformer constants (FL):
  • 5A: 10000 r/kW•h
  • 25A: 2000 r/kW•h
  • 100A: 500 r/kW•h
  • 500A: 100 r/kW•h
  • 400A: 125 r/kW•h
  • 2000A: 25 r/kW•h

7. Weight

• Weight: 2Kg

8. Dimensions

• Dimensions: 32cm × 24cm × 13cm