Have Honeywell 6160 Keypads And We Are A Group Home For Children. Our Pads Arel7

Looking to be able to silence the keypad (6160) so that when my awake staff goes from dorm to dorm they don't awake the sleep over staff  where another keypad is located. Our awake evening staff goes to the main office punches in the code to disarm the girls dorm and then does her rounds and then goes back to main office and rearms the dorm. The problem is that when she does this it chimes in the female sleepover room waking that staff up numerous time throughout the evening shift. How  do we arm/rearm keypad without having it make noise in the other office.Our chime mode is set off so don't know wwhat to do next Thanks