Making Welding Machine Calibration Simpler – TUNKIA TK6500 & TK6700

In industrial manufacturing, welding machines serve as essential equipment, widely used in steel structure fabrication, mechanical equipment production, pipeline engineering, bridge construction, shipbuilding, hardware processing, and more. The voltage and current parameters of the welding power source directly determine welding quality. Therefore, regular calibration of the AC and DC electrical outputs of welding machines is essential to ensure that the components produced meet required quality standards.

Traditional calibration methods typically involve disassembling the voltmeters and ammeters from the welding power source for offline verification. This process is cumbersome, inefficient, and poorly suited for on-site calibration needs.

Why is calibration of welding machines necessary?

From an operational perspective, arc welding machines rely on high-temperature arcs generated by instantaneous short circuits to melt metal materials and achieve welded joints. The magnitude, stability, and reliability of their electrical output have a decisive impact on welding quality.

During actual use, welders monitor and adjust the output through the built-in voltmeters and ammeters of the welding machine. Any deviation in electrical values—no matter how small—can lead to welding defects such as incomplete fusion, porosity, or cracks. These defects may cause the final product to fall short of functional quality standards and, in severe cases, can even result in major safety incidents.

Operating Principle of a Welding Machine

TUNKIA Solution to Welding Machine Calibration

TUNKIA offers two calibration solutions for AC and DC arc welding machines:

Solution 1: General-Purpose Combination

This solution comprises the TK6500 Arc Welding Machine AC&DC Power Calibrator paired with the TK6400 High-Power AC/DC Resistive Load Box, covering the calibration needs of most welding machines with specifications up to 3 kA.

Solution 2: All-in-One Field Solution

The TK6700 Electric Welding Machine Comprehensive Power Calibrator features a higher level of integration and is better suited for on-site routine calibration of conventional welding machines.

Both solutions enable direct on-line calibration without the need to disassemble the built-in ammeters and voltmeters of the welding machine, significantly improving on-site verification efficiency.

TUNKIA Welding Machine Calibration Solution – Core Advantages

TUNKIA's welding machine calibration solution has been carefully designed to address the practical challenges of on-site calibration, offering the following core advantages:

Advantage 1: Simplified Operation – No Disassembly Required

Traditional calibration methods require disassembling the voltmeters and ammeters from the welding machine for offline verification—a complex process that may compromise the machine's reliability after reassembly. Moreover, using a manual arc as a load causes current fluctuations that affect reading accuracy and introduce significant measurement uncertainty.

TUNKIA's solution employs a through-hole current sensor combined with built-in no-load/load voltage measurement modules, enabling direct on-site, in-line measurement of voltage and current without disconnecting the main welding circuit. The operation is both convenient and efficient.

Advantage 2: Broad Compatibility with Multiple Terminal Types

Another major challenge in on-site welding machine calibration is the wide variety of output terminal types. These primarily fall into two categories: copper busbar/bolt terminals and quick-connect terminals with locking mechanisms. Additionally, various standards exist—IEC, European, American, and more—resulting in a confusing array of non-uniform specifications.

To address this, TUNKIA provides busbars with copper terminals for direct bolt connections, along with a range of adapters compatible with the busbars. This setup accommodates over 90% of quick-connect terminals on the market, enabling plug-and-play convenience.

Advantage 3: Portable Design for Easy Transport

On-site calibration environments are often challenging, and equipment mobility is a key concern. The TK6500 calibrator main unit features an imported protective case—lightweight, compact, and highly durable—making it ideal for field use.

Both the TK6400 load box and the all-in-one TK6700 are equipped with pull-rod handles and wheels, allowing the entire system to be quickly rolled into position. This reduces physical strain on personnel and significantly improves inspection efficiency.

Advantage 4: Remote Synchronized Reading – Solving High-Platform Installation Challenges

In industrial welding sites, welding machines are sometimes installed on elevated platforms where it is difficult to bring standard calibration equipment. This makes it hard to synchronize readings between the standard and the unit under test.

TUNKIA's solution includes a dedicated tablet that allows users to photograph the readings of the unit under test while simultaneously retrieving standard device readings via Wi-Fi commands, achieving perfect data synchronization—even in hard-to-reach locations.

Additional Features for Comprehensive Analysis

Beyond the practical design enhancements above, TUNKIA's calibration solution also offers APP-based graphical display, 2nd to 128th harmonic measurement, power stability analysis, and multi-load cascade capability, empowering users to conduct in-depth analysis of welding power source output characteristics.

As a critical piece of equipment in industrial manufacturing, the welding machine's electrical output accuracy and stability directly affect weld quality, product safety, and operational profitability. Traditional disassembly-based calibration methods are inefficient and cumbersome, no longer meeting the demands of modern industrial sites for efficient, accurate, and portable calibration solutions.

Leveraging over two decades of technical expertise in electromagnetic measurement, TUNKIA has developed the TK6500 and TK6700 series welding machine AC/DC power calibration solutions. These systems are engineered to address real-world on-site challenges—eliminating the need for disassembly, accommodating diverse terminal types, easing equipment transport, and enabling remote reading synchronization—delivering a true "no-disassembly, plug-and-play, on-site efficient" experience.