You can turn the Chime on or off on most Ademco/Honeywell alarm panels by following the sequence below:
You will want to enter in you Master code + . When you turn the Chime on the panel will beep and show: "Ready Chime". When you turn the Chime off you do the same thing as before Master code + and again you will hear another beep but the screen will just show: "Ready".
E.g.  + 9 for Chime Off, enter it again for Chime On.
After you have Set a Master Code turning the chime on or off is a good way to test whether the code works properly.