What is the first step in the sampling procedure for conveyor belt discharge?

The first step in the sampling procedure for conveyor belt discharge is to interrupt the entire flow of materials. This action is crucial because it ensures that the sample obtained is representative of the entire batch being processed. When the flow is interrupted, the material can be collected in a controlled environment, which minimizes the risk of segregation and contamination that could occur if samples were taken while the conveyor is still running.

By halting the flow, the inspector can ensure that all the materials are stable and can be sampled uniformly. This leads to more accurate results in the analysis of the collected samples, providing reliable data for quality control and compliance with specifications. It's essential to start with this step to ensure the integrity of the sampling process before moving on to collect specific samples or increments from various locations of the discharge material.