I have a couple of these I use for Contact Closures and OPTOs with my NexGen rigs... but generally I use a separate BT SM-III unit for silence detection
However, looking at the manual for the ACS8.2 it seems this is doable. There are relays for this on the Top Row of the right-hand 16-position Connector in the rear (Pins 10-12 are N.O., Com and N.C. for Pgm 1 [respectively] and Pins 13-15 are N.O., Com and N.C. for Pgm 2 [respectively]). The manual says the Closure closes in an alarm state. Try wiring it to the COM and N.C. of whatever Pgm feed you are trying to monitor.
I'm not sure how to adjust it... if it's anything like the SM-III, there are probably dip-switches inside you need to play around with.
Could take a few tries though, and definitely double-check me... I've found that the Broadcast Tools manuals can be a little tricky and often worded very confusingly.
Then just plug it in to a Burk RC or something and have it buzz you if there's an issue. The only big issue I run into is resetting it if no one is around!