Installing & Servicing Electronic Protective Systems |
Common terms and phrases
12 volts active adjustment alarm circuit alarm condition alarm line alarm relay alarm system amplifier antenna applied audio automatically BAND PASS FILTER beam burglar alarm cabinet cable camera capacitor central station channel circuitry connected control box control unit coverage detection device diagram dialer door switch electrical electronic energy equipment fail-safe false alarms feet foil frequency geophone horn inches indication infrared input installation insured intruder klystron light line current located locking device loop magnetic master control meter microamperes microwave Model module monitor motion detector mounted normally closed normally open ohmmeter operation outlet output plug position potentiometer power supply premises protected area pulse range receiver relay contacts remote reset resistor Security Systems sensitivity control sensor shown in Fig solid-state sound standby battery standby power supervisory tamper switch telephone line terminal tone transducers transistor transmitter trigger ultrasonic voltage volts DC walk test window wire