What is the correct duration for trouble signal transmission from a secondary rechargeable battery?

The correct duration for trouble signal transmission from a secondary rechargeable battery is set at 1 transmission per minute. This frequency is established to ensure that any issues with the battery, such as low charge or malfunction, are reported promptly without overwhelming the monitoring system with excessive signals.

By transmitting a signal every minute, the system maintains a balance of timely notification and resource efficiency. It allows for an adequate response time for the monitoring service to investigate and resolve any critical issues without creating unnecessary alerts. This approach is particularly important in alarm systems, where continuous operation and quick reaction to potential problems are vital for safety and reliability.

Higher frequencies of signal transmission, such as those suggested in the other options, could lead to system overloads and may result in alarms being missed or delayed, complicating effective monitoring and maintenance processes. Thus, the one-minute interval is optimal for maintaining alertness while ensuring operational efficiency in alarm systems.