What happens when approximately 100 hours of life remains for the meter?

• A. The battery is replaced
• B. It will indicate Overload
• C. It goes to standby mode after one hour
• D. The self-test is initiated

Answer: (C)

When a meter has approximately 100 hours of life remaining, it typically transitions into a standby mode after a predetermined time, such as one hour, to conserve power and extend its operational life. While in standby mode, the meter reduces its energy consumption significantly, allowing it to remain functional for longer periods even as its battery life dwindles. This feature is crucial for operational efficiency, especially in fields like aviation where reliance on accurate instrumentation is critical.

In this context, other answers do not align with standard practices for meter operation. For instance, replacing the battery is not usually dictated solely based on remaining hours but rather on specific conditions or performance issues. Indicating overload and initiating self-tests are functionalities tied to the operational status and performance of the meter rather than a timed response to battery life. Therefore, the behavior of going into standby mode is the correct interpretation of the meter's response to nearing the end of its usable battery life.