M
Based off my interpretation of clause 201.11.8.101.2, it requires a high priority alarm when both supply mains and the internal battery fails. This alarm shall last for a minimum of 3 minutes.
My question is, how are people meeting this requirement?
It seems to me that to satisfy this requirement there would need to be:
1. An indication that the external DC supply cable was plugged in (charger present)
2. A voltage monitor for the charger voltage input
3. A voltage monitor for the battery voltage (with a reliable threshold of battery fail)
4. A visual indication
5. An audible indication
6. A method of detecting malfunction of the monitor circuit
7. A means of powering this additional circuit such as a capacitor or additional battery
My question is, how are people meeting this requirement?
It seems to me that to satisfy this requirement there would need to be:
1. An indication that the external DC supply cable was plugged in (charger present)
2. A voltage monitor for the charger voltage input
3. A voltage monitor for the battery voltage (with a reliable threshold of battery fail)
4. A visual indication
5. An audible indication
6. A method of detecting malfunction of the monitor circuit
7. A means of powering this additional circuit such as a capacitor or additional battery