Why Does Console Sometimes Chime 3 Times When Armed

[esox]

I have a Pro2000 that's connected to 4 window/door sensors and 3 motion detectors.  It's supposed to chime twice when I arm it.  However, sometimes when I arm it, the console will chime 3 times.  I checked the operation manual thoroughly and can't find anything to explain this.  Would appreciate any info on this.

[zach1234]

Try to activate all sensors connected to the system. Open all doors and walk pass every seensor and try it. Make sure all batterys work.

[Tuicemen]

esox: This has been noticed by others including myself!
There is another post conserning this but as long as you don't get repeated chimes After the third chime then all programed modules are working find!
Cheers & Happy Hollidays!