I'd have thought simply disconnecting the battery first would solve that. It should flag up an error on the panel but shouldn't set off the alarm. You're effectively simulating a battery failure. Best check the procedure for dealing with that first.
I'll check those out when I get back and see who made the alarm or if I have an instruction manualI suppose each are different but my system can be put into engineers mode so that work can be carried out without raising hell.