I JDave, thanks for your videos are very ussefull. I would like to know if you can help me with a doubts about Minerva T2000 and 851 PH sensor. The question is, if minerva T2000 can addressing a new smoke sensor? the problem is that i replace a new sensor, but the system tell me NO RESPONSE. the sensor 851 PH can addressing only with the servevice tool, but, can Minerva T2000 addressing too?