Perhaps this is what you are referring to Wil P.
Have just looked at Veritas 8 Instruction Manual - page 17 - where it states "24 hour zones (Fire, PA and Tamper) are disabed when the Programming Menu is accessed via an engineer code"
Perhaps this means you could open control box or PIR without causing alarm to activate!
Have not tried this myself but has anyone else?
Steve
Steve, September 2009