All-in-One On-site Electricity Meter Calibrator

The MOEORW-WNX40 is an integrated portable field calibration instrument independently developed for on-site and laboratory verification of single/three-phase active and reactive energy meters. Adopting multi-processor architecture with high-precision synchronous sampling circuit, the device integrates energy error testing, wiring fault diagnosis, harmonic spectrum analysis, waveform capture and CT ratio measurement functions. It supports dual power supply modes and multiple current sampling schemes (built-in 5A CT + detachable clamp CT), covering all mainstream domestic and foreign energy meter models without measurement blind zones. The equipment adopts industrial touch screen + physical key dual human-machine interaction, built-in large-capacity local storage and USB data upload interface, targeted for power metering inspection, metering verification and electric energy loss investigation scenarios.

Electrical Measurement Range & Accuracy

Standard Pulse Constant Output

Hardware & Core Circuit Design
1.Multi-processor architecture with high-speed floating-point DSP + 6-channel synchronous 16-bit ADC to realize synchronous acquisition of three-phase voltage and current signals, eliminate phase shift error caused by asynchronous sampling.
2.Equipped with 8.4-inch industrial TFT LCD (800×600 resolution), single-screen integrated display of electrical parameters, vector diagram, error data and parameter configuration without page switching frequently.
3.Dual operation mode: physical keypad + capacitive touch screen, supporting numerical input, parameter switching and function shortcut triggering to adapt to complex field operation environments.
4.Two independent power supply circuits: external mains power interface and self-powered via test voltage terminal Ua/Uo, no extra power adapter required for field measurement under live metering loop.
5.Independent signal terminals for voltage, built-in current, clamp CT, pulse input, standard pulse output and USB communication; physical power switching switch and main power cut-off switch for safety isolation.
 

Core Performance Advantages
1.Wiring fault recognition algorithm covering 144 error wiring combinations (48 for three-phase three-wire, 96 for three-phase four-wire), automatically generating text fault description and real-time vector diagram for visual judgment of inductive/capacitive load wiring status.
2.2nd ~ 51st harmonic synchronous measurement for all six voltage/current channels, supporting bar chart scaling, page turning and data hold function to quantify grid harmonic distortion.
3.Real-time waveform display of six sampling channels simultaneously, support transient abnormal waveform capture for grid distortion fault analysis.
4.Ultra-low startup current of built-in CT (minimum 2mA), supporting zero-load wiring inspection for high-voltage high-current metering loops.
5.Full-range measurement without dead zone, compatible with single-phase, three-phase three-wire V-connection and three-phase four-wire Y-connection active/reactive energy meters of all international specifications.
6.Large-capacity Flash local storage, each record stores calibration parameters, electrical data, vector graph, harmonic data and 5 groups of error values; USB hot-plug data upload without dedicated driver software.
 

Practical Field Application Value
1.Complete set of pulse acquisition solutions: compatible with photoelectric sampler, manual trigger and direct electronic pulse line for mechanical and electronic energy meters.
2.Independent CT ratio test module for low-voltage metering device fault troubleshooting, quickly judge CT ratio deviation, secondary open circuit and poor contact hidden danger.
3.Integrated data management module with record browsing, single record deletion and full data query by meter number; support custom calibration staff ID, user name and work order information.
4.System parameter configuration including real-time clock calibration, high/low frequency pulse output switching, adaptive filtering for load fluctuation to stabilize error test results.

Front Panel Components
1.8.4-inch touch LCD screen
2.Physical operation keyboard for numerical input and cursor control
3.Main power switch
4.Power mode selector switch (external mains / self-powered by test line)
 

Rear Terminal Layout
1.Ua / Ub / Uc / Uo voltage input terminals (color-coded wiring)
2.Ia± / Ib± / Ic± built-in 5A current CT terminals
3.Clamp CT dedicated interface for three phases
4.Pulse input socket (for photoelectric sampling / pulse wire)
5.Standard pulse output terminal
6.USB data communication port
7.External mains power socket

1.Host device ×1
2.Color-coded voltage test leads set
3.Built-in current connecting wires
4.Detachable three-phase clamp CT (optional range as requested)
5.Electronic pulse acquisition wire (black negative, yellow signal)
6.Photoelectric sampler for mechanical energy meter
7.USB data transmission cable
8.Operation manual
9.Carrying case

1.Power supply bureau metering station regular on-site energy meter calibration
2.High/low voltage metering device comprehensive error inspection for power anti-stealing audit
3.Substation metering cabinet wiring fault diagnosis and harmonic pollution monitoring
4.Laboratory routine verification of single/three-phase active/reactive energy meters
5.New energy station grid electrical parameter testing and metering loop debugging
6.Industrial enterprise internal power metering equipment periodic inspection

Daily Maintenance Rules
1.Wipe clamp CT jaws with alcohol cotton before each use to remove dust and metal debris, avoid measurement deviation caused by poor jaw closure.
2.Do not interchange three-phase clamp CTs randomly; each clamp is calibrated matched with corresponding phase channel at factory.
3.Avoid violent impact during transportation, store in dry, dust-proof carrying case when idle.
4.Disconnect current test line before voltage line when removing wiring on CT secondary loop to prevent secondary open circuit high voltage hazard.

Common Fault Elimination
1.Large error fluctuation: Increase calibration cycle count; clean clamp jaws; check pulse wire contact tightness.
2.Wiring recognition failure under light load: Utilize instrument's 2mA ultra-low startup built-in CT to ensure valid current sampling.
3.Unable to upload data: Reconnect USB cable, confirm storage record exists before transmission.
4.Screen no display: Toggle power mode switch, verify test line voltage meets 45~450V self-powered requirement.