The gas meter test dial can be used for:

The gas meter test dial is primarily used for checking the input of an appliance. This involves monitoring the volume of gas being consumed by the appliance to ensure it operates within its designed specifications. By observing the test dial, technicians can determine if the gas flow is adequate and if the appliance is functioning properly without any restrictions or leaks.

Using the test dial provides a way to measure the actual gas usage during operation, allowing for assessments of efficiency and performance. It’s particularly useful in troubleshooting gas appliances and verifying that they are getting the right amount of gas for optimal performance.

While other options involve different aspects of gas systems, they are not the primary purpose of the test dial. For example, final billing purposes relate to cumulative usage over a billing cycle, and checking system pressures involves pressure gauges and other diagnostic tools. Adjusting the relief setting is a task that typically requires specialized equipment and cannot be accomplished through the meter test dial.