400641-006 - Tweco DC Ammeter Single Scale Replacement Gauge

Precision Instrumentation for Industrial Welding

The Tweco 400641-006 DC Ammeter is a critical component for maintaining the accuracy and reliability of your welding operations. In professional fabrication environments, adherence to Welding Procedure Specifications (WPS) is non-negotiable. This single-scale analog meter provides operators and quality control personnel with immediate, clear visual verification of the Direct Current (DC) amperage output from the power source. Unlike digital displays which can sometimes be difficult to read under fluctuating load conditions, the analog needle movement of this meter offers an intuitive representation of current stability and output levels.

Designed as a genuine OEM replacement part, this ammeter is engineered to withstand the rigorous conditions typical of industrial manufacturing floors. It features a robust internal movement mechanism capable of enduring the vibration and thermal cycling associated with heavy-duty welding machinery. The single scale faceplate is uncluttered, reducing the risk of reading errors during high-pressure production runs. Proper instrumentation is vital for process control; a functioning ammeter ensures that the heat input into the base material is consistent, thereby safeguarding the mechanical properties of the final weldment.

Installation of the 400641-006 is straightforward for maintenance teams familiar with welding power source repair. It is designed for panel mounting, integrating seamlessly into the control interface of compatible Tweco and thermal arc welding systems. By replacing damaged or illegible meters with this high-quality component, facilities can ensure their equipment remains compliant with calibration standards and operational requirements. Whether used for troubleshooting power source performance or daily production monitoring, this DC ammeter delivers the reliability expected from the Tweco brand.

Technical Application

This meter is specifically calibrated for DC welding applications. It is essential for processes such as MIG (GMAW), TIG (GTAW), and DC Stick (SMAW) welding where current control is the primary variable affecting penetration and bead profile. The unit serves as a direct replacement for specific legacy and current production models, ensuring that the electrical characteristics of the metering circuit remain unaltered.