TESCO Metering Expands TESCO Portable Meter Testing Platform with New Model 6440 Three-Phase Voltage Synthesizer

BRISTOL, Pa. — As electric utilities continue modernizing the grid with advanced metering infrastructure (AMI), distributed energy resources (DERs), electric vehicle charging infrastructure, and increasingly sophisticated distribution systems, field technicians require testing equipment that is as adaptable as the systems they maintain. Responding to that need, TESCO Metering today announced the Model 6440 Three-Phase Voltage Synthesizer, the newest expansion of the TESCO Portable Meter Testing Platform.

The TESCO Portable Meter Testing Platform is designed to provide utilities with a flexible, modular approach to field testing. Anchored by the proven TESCO 6330 Meter Site Analyzer and now expanded with the new Model 6440 Three-Phase Voltage Synthesizer, the platform delivers laboratory-grade testing capabilities in a portable, field-ready solution. By separating voltage generation from measurement and analysis, utilities can configure the right combination of instruments for each application without the size, weight, or complexity of traditional integrated testing systems.

“Utilities continue to invest in smarter grids, advanced metering technologies, and increasingly complex electrical infrastructure,” said Tom Lawton, President and CEO of TESCO Metering. “The expansion of the TESCO Portable Meter Testing Platform with the Model 6440 gives technicians a highly accurate, portable three-phase voltage source that integrates seamlessly with the 6330 Meter Site Analyzer. Together, they provide utilities with a scalable platform for commissioning, validating, and maintaining today’s sophisticated revenue metering systems while giving customers the flexibility to expand their testing capabilities as their needs evolve.”

A Smarter Approach to Portable Meter Testing

Traditional field testing often requires technicians to transport large, integrated testing systems or depend on available utility voltage to perform commissioning and troubleshooting. The TESCO Portable Meter Testing Platform takes a different approach by allowing technicians to deploy only the equipment needed for the task at hand.

The Model 6440 provides a programmable, isolated three-phase voltage source, while the 6330 Meter Site Analyzer performs comprehensive measurement and analysis, including voltage, current, phase angle, burden, harmonics, and overall meter accuracy. Together, the instruments create a complete portable solution for commissioning, validating, troubleshooting, and maintaining revenue metering installations throughout the utility system.

Whether technicians require voltage simulation alone or a complete meter testing solution, the modular architecture of the TESCO Portable Meter Testing Platform provides the flexibility to support a broad range of field applications while reducing equipment weight, simplifying transportation, and protecting existing investments as testing requirements evolve.

Engineered for Modern Utility Applications

Purpose-built for revenue metering and distribution system testing, the Model 6440 generates programmable three-phase voltage outputs from 69 to 480 VAC, supports both 50 Hz and 60 Hz systems, and delivers 100 VA per phase with ±0.5% voltage setting accuracy and less than 3% total harmonic distortion (THD).

The synthesizer supports multiple utility service configurations commonly encountered in the field, including:

• 69/120 V WYE
• 120/208 V WYE
• 120/240 V DELTA
• 277/480 V WYE
• 240/480 V DELTA

Featuring an FPGA-controlled architecture, isolated Class-D amplifier design, integrated surge protection, and rugged field-ready construction, the Model 6440 delivers precise, repeatable voltage generation for demanding utility environments. The unit operates from a standard 120 VAC power source and provides technicians with laboratory-grade performance in a highly portable package.

One Platform. Multiple Utility Applications.

The TESCO Portable Meter Testing Platform supports a wide range of field applications, including:

• Revenue meter commissioning
• Meter installation verification
• Revenue meter accuracy testing
• Intertie meter testing
• Advanced metering infrastructure (AMI) validation
• Distributed energy resource (DER) interconnection testing
• Power quality investigations
• Site acceptance testing
• Preventive maintenance
• Meter troubleshooting
• Utility workforce training

The platform supports both electromechanical and solid-state revenue metering technologies, enabling utilities to standardize field testing procedures across legacy infrastructure and modern smart metering deployments.

Built for the Future of Utility Metering

As utilities continue expanding investments in grid modernization, renewable energy integration, electric vehicle infrastructure, and digital distribution networks, accurate field verification has become increasingly critical to ensuring reliable system performance and billing accuracy.

The TESCO Portable Meter Testing Platform provides utilities with a scalable foundation for portable field testing, combining precision voltage generation with advanced measurement and analysis in a modular architecture that grows alongside utility requirements. By expanding the platform with the new Model 6440 Three-Phase Voltage Synthesizer, TESCO Metering continues to deliver innovative solutions that improve safety, increase operational efficiency, and help utilities maintain the highest standards of metering accuracy.

For more information about the TESCO Portable Meter Testing Platform and the Model 6440 Three-Phase Voltage Synthesizer, visit Portable Three Phase Voltage Source for Field Meter Testing | 3PV

About TESCO Metering

Since 1904, TESCO® Metering has been the trusted leader in American-made metering equipment and custom utility products for the electric utility industry. With over a century of engineering innovation, TESCO Metering designs and manufactures precision meter testing instruments, field test kits, and smart grid metering solutions that ensure accuracy, reliability, and compliance across today’s evolving energy infrastructure.

From our ISO 9001 and ISO 17025 certified facility in Bristol, Pennsylvania, TESCO Metering proudly builds all products in the US, supporting domestic manufacturing, short lead times, and superior quality control. Our U.S.-manufactured metering systems serve utilities across North America, including meter test boards, burden sets, EVSE testers, optical probes, and custom field-testing equipment engineered for precision and durability.

TESCO Metering’s portfolio spans lab-grade testing setups, rugged field kits, and AMI test solutions designed to meet the demands of modern smart grid environments. What sets TESCO Metering apart is our close collaboration with utility engineers, meter shop managers, and field technicians—developing custom metering tools that solve real-world challenges, improve safety, and streamline operations.

Beyond products, TESCO Metering is deeply committed to metering education and industry training. Our annual TESCOOL event and support of regional meter schools reflect our dedication to advancing utility expertise and maintaining technical excellence across the metering community.

With generations of trust, TESCO Metering continues to lead in custom utility solutions, American-made metering equipment, and dependable technical support. Contact us to learn how TESCO Metering’s precision utility instruments can improve accuracy, safety, and efficiency for your metering operations.

Reliable Results. Every Meter. Every Time.