How should the setting gauge be positioned in relation to the welding gap?

The setting gauge should be positioned upwind in relation to the welding gap to ensure effective thermite welding. Positioning the gauge upwind allows for optimal control over the welding process, as it aids in directing the heat and sparks generated during the reaction away from the operator and towards the gap. This positioning helps in maintaining a clear and safe working environment while also allowing the operator to accurately assess the material being welded and adjust settings as necessary.

In the context of thermite welding, it is essential to manage the heat and flow of molten material effectively. Being upwind helps prevent any debris or harmful fumes from blowing toward the operator, thereby enhancing safety during the operation. Proper positioning of the gauge is crucial for achieving the desired quality in the weld and ensuring that the process is conducted safely and efficiently.