Lightweight On-site Electricity Meter Calibrator

The MOEORW-WNX51 is a lightweight multi-functional field calibrator adopting DSP + FPGA + triple ARM heterogeneous control architecture, developed for high-efficiency on-site verification of energy metering equipment. The equipment integrates four-quadrant energy measurement, wiring vector analysis, 51-order harmonic analysis, CT ratio testing, multifunction meter data reading and clock error detection. It supports multi-channel communication including USB, Bluetooth, WIFI and Type-C charging, with built-in large-capacity embedded database storing over 100,000 groups of test records. The ultra-compact body (weight less than 1.2kg) supports battery built-in power supply and live loop self-power supply, equipped with touch + physical dual control and handwritten Chinese input function, suitable for mobile power inspection, metering periodic verification and grid loss analysis.

Core Electrical Parameters

Standard Pulse Constant Parameters

Hardware & Embedded System Design
1.Heterogeneous multi-chip solution composed of DSP high-speed operation core, FPGA logic control and ARM human-machine processing chip, eliminating analog potentiometer, all error correction realized via digital software to avoid long-term transport accuracy drift.
2.800×480 high-brightness true-color wide viewing LCD, integrated six-channel real-time data display of electrical parameters, six-angle vector diagram, error results and harmonic spectrum without page jump.
3.Multi-mode human interaction: physical numeric keyboard, capacitive touch screen, handwriting Chinese/English input, supporting scanning gun external access via USB interface for meter information batch entry.
4.Multi-mode power supply: built-in rechargeable lithium battery, Type-C charging port, live voltage self-power supply mode with one-key switching function, automatic power protection when overvoltage occurs.
5.Rich communication expansion: dual pulse input interfaces, infrared meter reading window, RS232/TTL communication, Bluetooth/WIFI wireless transmission, USB host port supporting U disk data export and online firmware upgrade.
 

Measurement & Calibration Performance
1.Digital true reactive measurement algorithm, free from interference of three-phase unbalance, phase offset and frequency fluctuation, stable reactive energy measurement precision up to Class 0.1.
2.Four-quadrant energy synchronous measurement, simultaneously calculate forward/reverse active and reactive power for bidirectional metering equipment verification.
3.Intelligent wiring identification: 48 types of three-phase three-wire wrong wiring, 96 types of three-phase four-wire wrong wiring, automatically generate three groups of vector diagrams under different power factor conditions for field comparison judgment.
4.Independent clock error test module, support GPS/Beidou external standard clock access, calculate daily time error (s/24h) of multi-function energy meter as per metering calibration standards.
5.Complete CT testing function: measure primary/secondary current ratio, phase difference and polarity, quickly locate secondary open circuit, poor contact and internal winding short-circuit faults of low voltage current transformers.
 

Scenario-Oriented Application Functions
1.Simultaneous calibration of main and auxiliary energy meters, real-time display of three groups of instantaneous errors and standardized rounding error, color-coded alarm when error exceeds meter accuracy tolerance.
2.Multi-brand multifunction meter infrared/485 reading function, compatible with DL/T645, ABB, Siemens, Red Phase and other international meter communication protocols to obtain peak/flat/valley energy data.
3.Seal information management module, support RFID scanning gun input of disassembly and installation seal serial numbers, record seal position and operation time for power audit traceability.
4.Secondary load testing function for CT/PT metering loops, calculate conductance, susceptance and apparent load value to judge loop overload hidden danger.
5.Built-in energy loss inspection workflow, integrated comprehensive error, single meter error and CT fault detection functions for one-stop anti-stealing electricity field inspection.
6.Offline data management system: support work order, user number and name labeling, record screening by keywords, batch data export to U disk or PC management software, printable inspection reports via optional Bluetooth printer.

Front Operation Panel
1.High-resolution touch color screen
2.Integrated numeric & function physical keyboard (DEL, direction, enter, shortcut keys)
3.Long-press power on / short press standby power button
4.Status indicator: low-frequency pulse light, battery charging indicator
 

Rear Terminal Layout
1.UA / UB / UC / COM three-phase voltage sampling terminals (COM as neutral/B-phase common terminal)
2.IA± / IB± / IC± direct 5A current input/output terminals
3.A/B/C three-phase clamp CT dedicated input ports
4.Dual pulse communication sockets (Pulse 1 for main meter, Pulse 2 for auxiliary meter/clock test)
5.Infrared meter reading transparent window
6.Type-C charging & data communication integrated port

1.Main calibrator unit ×1
2.Color-coded three-phase voltage test wire set
3.5A three-phase clamp CT group
4.Multi-spec optional large-range clamp CT (customer specified)
5.Photoelectric pulse sampler & manual trigger switch
6.Pulse signal connecting cable
7.Type-C charging & data transmission line
8.Portable shockproof carrying bag
9.Full version operation manual & PC management software CD

1.Mobile power grid metering periodic field calibration
2.Power supply company electricity theft investigation and metering loop fault troubleshooting
3.New energy photovoltaic/wind power station bidirectional metering equipment testing
4.Industrial and commercial large user low-voltage metering cabinet comprehensive error detection
5.Laboratory calibration of single/three-phase active/reactive energy meters
6.Multifunction smart meter clock error, rate data on-site reading and verification
7.Substation PT/CT secondary load monitoring and grid harmonic pollution analysis
8.Electric power metering laboratory equipment daily inspection and self-calibration

The design, hardware circuit and measurement algorithm of MOEORW-WNX51 comply with the following international & domestic electric power metering standards:
1.DL/T826-2002 Technical Conditions for AC Energy Meter Field Testers
2.GB/T17215 Static AC Active Energy Meters
3.GB/T15283 Alternating Active Energy Meters of Class 0.5, 1 and 2
4.GB15282 Reactive Energy Meters
5.IEC 61036 Static Meters for Active Energy
6.IEC 1000 EMC Electromagnetic Compatibility Standard
7.JJG596 Verification Regulation for Electronic Energy Meters

Routine Maintenance Specifications
1.Clean clamp CT jaws with anhydrous alcohol before each measurement, ensure complete jaw closure with no gap to avoid angle error increase.
2.Do not cross-use A/B/C phase clamps; each clamp has factory phase matching calibration data, interchange will cause accuracy deviation.
3.Store the instrument in dry environment with temperature range -20 ~ +40 ℃; avoid chemical corrosive liquid wiping screen and shell.
4.Charge the built-in lithium battery when power indicator turns red; full charge indicator turns green, long-term idle needs monthly supplementary charging.
 

Common Fault Troubleshooting
1.Screen blank after startup: Check battery power, switch to live line self-power supply mode via triple # key operation.
2.Error data severe jitter: Increase calibration cycle count, enable instrument internal digital filtering function.
3.Fail to read multifunction meter data: Confirm communication wiring, select corresponding meter protocol and correct baud rate.
4.CT ratio test phase difference exceeds 5°: Check clamp installation polarity, wipe jaw surface to eliminate metal oxide.
5.U disk cannot identify stored records: Format U disk to FAT32 format, re-export data after reconnection.