add chat to your website

Radian Research Logo

ANSI Products
IEC Products
Radian Accessories
Customer Services
Customer Hub


  RD-33 Dytronic Three-Phase Reference Standard


Harmonic Generation

The 4150X and 4330X both have harmonic generation capabilities, you can now put various meter brands and meter technologies through a full harmonic analysis. 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, you can get the full picture of how a metering device is going to perform.

We have extended the analysis functionalities to bring real world field conditions back to the shop. Captured harmonic and/or trend data from the RW-30X can be played back allowing various meters to be tested under actual field load conditions. The load condition can be automatically played back from the captured data, providing an accuracy per meter “revolution” and the average accuracy of the entire test.

Multiple VAR Test Types

There is more than one way to run a VAR test, and ANSI is constantly approving new calculation methods. Unlike other test systems, the 4150X and 4330X allow you to select from any ANSI approved calculation method to test a meter. This gives your utility the ability to choose the method that best fits its structure and needs, rather than having to accept the single method that a particular system is capable of testing.

Fuseless Hardware Protection

With this latest generation of test system we aimed to build the most reliable hardware on the market. Voltage and current sources feature fuseless self-protection technology, providing hardware protection from short-circuit, thermal, and over-current fault conditions.

Ease Of Maintanence

Our state-of-the-art card cage provides ease of maintenance. The labeled circuit boards easily plug into the cage. If necessary, simple as well as fast troubleshooting is possible because the boards can be swapped between phases to quickly check for hardware failures.


The WECO 4150X and 4330X automated test platforms are the touchstone in meter testing hardware. Building on our tradition of delivering testing solutions that provide a powerful mix of accuracy, convenience, and versatility, both models add next generation features and cutting-edge technology. The NIST traceable Radian Research RX-30 series reference standard provides unparalleled accuracy to the testboards. The difference between the two models lies only in the current and the weight. Need a current range between 0.001A to 150.0A? The WECO 4150X is the testboard for you. Should you need higher current capability the WECO 4330X provides a range of current from 0.001A to 330.0A, making Full Load Class 320 testing a snap.

The foundations for this revolutionary system are the features and innovations that have put Radian at the forefront of the industry for over thirty years. Low insertion force Smart Socket™ technology, fitted with high conduction silver and gold connections, and an electronic socket control, provide an excellent connection and extended hardware lifespan. A laser based optics system employing high intensity light delivers highly accurate results from black marks or creep holes through even the dirtiest covers. Front mounted controls allow simple test selection and testboard control. An optional barcode scanner and printer cuts meter processing and data entry time. The optional OPTOCOM™ interface allows the meter to be tested and programmed without ever having to change the head. The 4150X and 4330X are enhanced by WATT-Net Basic Software.Developed in a .NET environment with fully integrated SQL Express database and Winboard 3 meter test software. Connectivity to a shared or enterprise database can be realized through enhanced WATT-Net Express, Limited and Plus software.

WATT-Net Basic Software suppied with 4150X and 4330X have Winboard 3 integrated. With Winboard 3 you can build advanced test sequences that allow you to control every parameter of a test, simplifying even complex tasks, and generate results that are compatible with all major databases (MS SQL, Oracle, Sybase). The WATT-Net family of data management solutions gives you unparalleled test result organization, reporting, and exporting abilities. The innovative 4150X and 4330X automated test platforms are designed to help utilities maneuver today’s real world metering issues.

Technical Data

Features & Specifications

Test voltage:
   20–600V; independently programmable per phase in 0.01V steps, with four digits of resolution
   True three-phase or single-phase
   Voltage phase-angle setting relative to VA, 0-359.99° in 0.01° increment
Test current:
   WECO 4150X: 0.001-150A; WECO 4330X: 0.001-330A; independently programmable per phase in
   0.001A steps, with four digits of resolution. Max compliance @ 150amps or 330amps = 0.8V
   Current phase-angle setting relative to VA, 0-359.99°, selectable in 0.01° increments per phase
Test revolutions:
   Selectable from 1–65,534
Test time:
   Selectable from 1–9999 seconds (minimum of at least one energy pulse)
Demand (KW) testing:
   Standard revolutions (1–99999 revolutions) Time run (up to 99 HRS, 59 MIN, 59 SEC)
VAR testing:
   All ANSI defined VAR calculation methods are supported
Contact device testing:
   Form “A” or “C” capability
Voltage and current circuit burden:
   Displays the actual VA load per active element
Harmonic generation:
   Generation to the 60th harmonic, independent control in each current and voltage circuits, 6 channels
Analog test:
   Analog testing using a current loop configuration of voltage, current, phase, power factor,
   Watt, Var, and VA transducers
   All analog devices with a maximum output of ±20mA are supported
   Supports internal loop power or external loop power transducers
Meter disconnect switch test:
   Requires a user supplied method to communicate to the AMI Module, typically provided
   by the AMI vendor or meter manufacture.

Automatic crossed stator wiring check during three-phase testing

Modulated laser optics for through hole and reflect disk sensing

Three IR Optical Pickups: Top, bottom, and middle/center
Visual and audible (volume controlled) pulse indication for aid in aligning optical sensor.
LED bar graph for signal strength for mechanical meters
Easily removable reference standard for recertification or standard upgrade
PC Minimum System: Dell™ standard business class Mini Tower PC, 17” flat screen monitor,
   Microsoft Windows® 7 Pro OS
Input voltage: 90–264VAC (3 wire), 50 or 60Hz single-phase, auto ranging
Input power: 1500W maximum
System accuracy: KWH +/− 0.04% at 1.0 P.F.
   0.02% and 0.01% accuracy standards available
   System accuracy is based upon the high accuracy of the
   NIST traceable Radian RX-30 series reference standard
Test frequency: 45–65Hz in 0.001Hz steps, accuracy 25ppm
Voltage and current harmonic distortion: Less than 1.0% THD (pure sine selected)
Voltage and current sources: Feature fuseless self protection technology
Meter test forms: All current and future ANSI meter forms. For forms without a common current return
   (i.e. Form 7)
   New meter forms can be added using the testboard utility included in the software package
Dimensions and weight: Approximately 21˝ W × 20˝ H × 21˝ D
   WECO 4150X: 150 LBS (Approximately)
   WECO 4330X: 160 LBS (Approximately)

    Two (2) limited warranty (all parts and labor). Manufacturer warranty on computer.


Testboard options:

• OPTOCOM™: Optics coupler allows pulse testing and meter programming through the optical port
   of many solid state meters without changing the optics coupler.
• Barcode printer with software
• Barcode reader with software
• Multi-function testing capability
• Higher accuracy reference standards available
• RX-31 accuracy 200ppm (±0.02%)
• RX-33 accuracy 100ppm (±0.01%)
   A unit with a RX-33-xxx standard requires a maximum ambient temperature of 30˚C to
   remain within specification
• Bottom connected single stator adapter
• Bottom connected multi stator adapter
• Custom adapter designs available
• Standards compare adapter for RM or RD standards, single-phase or three-phase
• Asset and Smart Grid Device Management Software WATT-Net Basic,
   Express, Limited and Plus™

Front panel display:
   The 4000 family now features a color touch screen display built into the test board front panel.
   This display provides information from the internal removable RX Reference Standard; including
   Energy Metrics, Vectors, Status, and more.


OPTOCOM™: With this optional interface you can test and program meters without changing heads. Just clamp the head on for testing and forget worrying about aligning optics or detecting creep holes. When the test is complete you can program the meter without replacing heads. The OPTOCOM™ option
takes the error and effort out of meter testing.

Turbo Test™: WECO has worked hand-in-hand with the industry’s leading meter manufacturers to bring you Turbo Test™ technology. Slash the amount of time it takes to test a supported meter on either WECO’s 2300 or 2350 three-phase testboards to nearly one-fifth of regular testing time. Convenient software wizards make setting up and running a Turbo Test as easy as it is fast. Save your shop valuable time and money with WECO’s Turbo Test option.

Barcode Scanner

Barcode Scanner: Attach an optional barcode scanner and printer to your testboard to cut meter processing and data entry time. Scan AEP barcodes on meters with a wave of the barcode scanner to automate the data entry process, or print custom barcodes to automate customer information entry during testing. Either way the optional barcode scanner and printer will save your shop time and money.

Transformer Rated Meter and CT Lab Test Adapters for use with WECO 4330 and 4150 Test Boards

Single Phase A-Base Adapter

Poly Phase A-Base Adapter

Zebra ZM400 Bar Code Printer

Zebra Bar Code Printer Software

M4150 Standards Compare Adapter, External RD-3X/2X. Supports testing up to 120 amps using external RD-3X standard. Supports up to 66 amps using external RD-2X standard.

225 Amp Standards Compare Kit for RD Standards SCA-3-RD-Kit.

SCA-4, Socket to Panel Meter Adapter

IEC to Socket Adapter, Universal (requires modification to front panel of test board)


Arrow WECO 4000X Series Brochure
Arrow WECO Meter Test Board Video Series
Arrow Transformer rated Meter and CT Lab Test Adapter (AL0038 & AL0039)
Arrow Standards Compare Adapter Comparisons

You Know It;s True When It's Blue
An Employee Owned Company
Certification and Accreditation Home Copyright Radian Research Inc 2015