AUTOMATED METER TEST BOARDS

4050X, 4150X & 4330X
WECO Test Boards

The WECO 4050X, WECO 4150X, and WECO 4330X by Radian Research are advanced, high-accuracy single-position meter test systems designed for utilities, meter shops, and calibration laboratories.

Engineered for accuracy, precision, and stability, these systems provide a comprehensive solution for testing single-phase and polyphase meters in both laboratory and field environments. Each model offers unique features to fit specific testing needs while maintaining industry-leading traceability. All three offer true three-phase testing, onboard optics and a removable RADIAN reference standard with a choice of 0.01%, 0.02% or 0.04% accuracy.

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Product Highlights

The WECO 4050X, WECO 4150X, and WECO 4330X are high-precision, single-position meter test systems designed for different levels of testing needs. The WECO 4050X is the most compact and lightweight model, ideal for basic single-phase and polyphase meter testing with standard accuracy.

The WECO 4150X expands on these capabilities by offering higher current testing options, making it suitable for a broader range of meters. The WECO 4330X is the most advanced model, featuring the highest current sourcing capability along with comprehensive power quality analysis, making it the best choice for complex meter testing and in-depth analysis.

Precision Perfected with WECO Test Boards

WECO 4050X

The WECO 4050X is the most compact and lightweight model, ideal for basic single-phase and polyphase meter testing with standard accuracy.

The Test Board provides 0.001A to 50.0A.

WECO 4150X

The WECO 4150X expands on these capabilities by offering higher current testing options, making it suitable for a broader range of meters.

The Test Board provides 0.001A to 150A.

WECO 4330X

The WECO 4330X is the most advanced model, featuring comprehensive power quality analysis and additional diagnostic tools, making it the best choice for complex meter testing and in-depth analysis.

The Test Board provides 0.001A to 330.0A.

The WECO 4330X configured into a 2x2 formation

A meter technician using a WECO Test Board in a meter shop.

Features

Accuracy, Precision & Stability with WECO Test Boards

Removable RADIAN reference standard with a choice of 0.01%, 0.02% or 0.04% accuracy
Supports testing of a wide range of residential and commercial meters.
Easily program and automate meter testing procedures for efficient, repeatable results.
Supplied with WATT-Net Software for automated data collection, analysis, and reporting.
Engineered with generation to the 60th harmonic and independent harmonic control in each of the current and voltage circuits (6 channels) as defined by order, magnitude and phase.
Backed by 17025 accreditation for industry-leading measurement uncertainties and unmatched customer trust over 35+ years.
True three-phase testing with onboard optics on all three models

Delivering Accurate, Precise, and Stable Meter Testing

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Accessories

Enhance your WECO Test Board experience with a range of accessories designed to optimize meter testing efficiency and convenience.

Which Model Is Right for You?

All three single-position test boards share the same foundation: true three-phase testing, onboard optics, a removable RADIAN reference standard with a choice of 0.01%, 0.02% or 0.04% accuracy, generation to the 60th harmonic, programmable automated test procedures and WATT-Net software for data collection and reporting. They support ANSI C12.1 compliance testing and legacy C12.20 testing.

The main difference is the current range. Choose the model that covers the highest-current meters in your shop. Read our ANSI C12.1-2026 white paper for what the new standard changes.

Model	Current	Reference	Best for
WECO 4050X	0.001–50 A	Removable 0.01, 0.02 or 0.04%	Single-phase and polyphase meter testing in the meter shop
WECO 4150X	0.001–150 A	Removable 0.01, 0.02 or 0.04%	Higher current testing for a broader range of meters
WECO 4330X	0.001–330 A	Removable 0.01, 0.02 or 0.04%	Complex meter testing with power quality analysis and diagnostics

WECO Test Board FAQ

Do the WECO 4050X, 4150X and 4330X support ANSI C12.1-2026?

Yes. All three test boards support ANSI C12.1 compliance testing as well as legacy ANSI C12.20 testing. Our ANSI C12.1-2026 white paper explains what the updated standard means for meter shops.

What software comes with the test boards?

Each board is supplied with WATT-Net Software for automated data collection, analysis and reporting. The base WATT-Net Software comes with every RADIAN test system at no license fee, and optional modules add inventory, sampling and asset lifecycle tools.

Can the test boards test meters under harmonic conditions?

Yes. The boards generate harmonics to the 60th, with independent control of order, magnitude and phase in each of the six current and voltage channels.

The WECO 4050X superimposed over a semi-transparent meter tech using the equipment in a shop.

How is test board accuracy maintained?

The boards are built with RADIAN precision reference standards and backed by ISO/IEC 17025 accreditation. RADIAN Calibration Services keep them within specification over their working life.

Can I test streetlight meters or submeters in volume?

Yes. The RADIAN Multi-Channel Pulse Comparator adds 16 pulse inputs and integrates with the WECO 4050X, 4150X and 4330X for high-volume streetlight and submeter testing.