Manual data input: Manual input should only be used if the other means described are not available. Manual input is prone to human error and therefore should be done with great care. Enter into the controller the welding time and weld voltage as written on the barcode label. Recheck the data on the control box screen by comparing to that on the barcode label. Post weld inspection Once the controller has stopped the weld cycle there are a few things that should be checked by the welder. Controller: Check that the actual weld time is the full weld time defined for the product and that no error message is showing on the controller screen. Product: Check that the rising pin/pins (melt indicator) on the product have risen. The rising of the Melt Indicator pin is dependent on many factors, such as the geometry of the rising pin, the gap between the pipe and the fitting, pipe out- of-roundness, the ambient temperature and others. The Melt Indicator indicates only if a weld has been performed (or not). The melt indicator does not give any indication of the quality of the weld or if the full weld cycle has been completed. Any rising of the Melt Indicator pin, even a small one, indicates that a weld has been performed. The indicators are used to highlight if a more detailed inspection of the joint is required.
Sample of raised melt indicator after welding
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