Hi I have been requested to provide a video as proof that all 7 of my alarms are working. This I have done using video for each individual unit being tested. Each has performed perfectly. However now I have been requested to provide proof each unit is connected. How can I do this. The building control surveyor would like to see and hear all alarms on the system being activated at the same time. I cannot see any instructions for this action. Can anyone provide any information on this whole system test.