My iPad 5 is giving an unexplained alarm.
I have it charging via a lightning cable through the USB port on an echelon exercise bike. I only use it on the bike for a speedometer and milage tracker via the echelon fit app. It randomly goes into a strange alarm that I've never heard before. I've sampled all the notification sounds and can't find any standard ones that match it. I found an alarm that was in the iPad (wasn't on) and deleted it. I've checked and all my apps are set to "notifications off". The alarm will sound until you sign in and push the home button a couple times or until you push the reset button on the top. Took a video:
