NICET ITFAS Level II key terms

A device that starts a signal in the fire alarm system when it detects a change such as smoke, heat, water flow, or manual pull. It reports to the control unit for processing.

A device that alerts occupants after the system processes an alarm, such as a horn, strobe, speaker, or chime. It produces audible, visible, or voice output in the protected area.

The wiring path connecting initiating devices to the control unit. It carries detection signals and supervises the conductors so opens, shorts, and grounds are reported as trouble conditions.

The circuit feeding notification appliances, often called a signal circuit. It supplies operating power to horns and strobes and is supervised for opens and shorts unless a listed exception applies.

A device with a unique digital identifier that reports its own status to the control unit. The address lets the panel display the specific device location without relying on zone wiring.

The unique numeric or alphanumeric identifier assigned to a device on an addressable system. Correct programming and labeling of addresses is verified during acceptance testing.

The addressable loop or circuit that carries power and digital communication between the control unit and addressable devices. It is supervised and typically supports Class A or Class B wiring styles.

A fire alarm arrangement where devices share a zone circuit and the panel reports only the zone, not the individual device. Testing confirms each zone annunciates correctly.

A defined area or group of devices reported as one unit by the control unit. Zones are labeled on the annunciator and verified during testing to match the approved design.

Continuous monitoring of circuit integrity so the panel detects and annunciates opens, shorts, grounds, or power loss. Supervised circuits must produce a trouble signal rather than fail silently.

A wiring style where the circuit leaves and returns to the control unit on separate paths. A single open does not prevent operation of devices beyond the break, and the fault is annunciated.

A wiring style where the circuit runs out from the control unit and ends at the last device. An open stops operation beyond the break, so the panel must annunciate the fault as a trouble.

A resistor installed at the far end of a supervised conventional circuit to allow the panel to monitor wiring continuity. Its value must match the panel's listed requirement.

The output produced when the system processes an alarm condition. It drives notification appliances and may include audible, visible, and voice components depending on the system design.

The state reached when an initiating device operates and the control unit processes the signal as a fire or emergency event. The panel then activates programmed outputs and annunciates the location.

An indication that a monitored condition is abnormal, such as a circuit fault, power loss, or device failure. Troubles sound a distinctive audible and visible indication at the control unit.

A signal indicating that a system or suppression component is off-normal, such as a closed valve or low pressure. It is distinct from alarm and trouble signals and requires attention.

A remote or local display that shows alarm, trouble, and supervisory conditions by zone or device. Testing verifies that annunciated labels match the approved design and as-built drawings.

A measurement confirming that a smoke detector responds within its listed sensitivity range. The test uses a calibrated instrument or listed method and results are recorded for the acceptance report.

An initiating device that senses products of combustion and sends an alarm signal. Testing introduces a listed aerosol or smoke source and confirms the panel reports the correct device.

An initiating device that responds to a fixed temperature, rate of temperature rise, or both. Testing uses a listed heat source and confirms the panel annunciates the tested device.

A heat detector that operates when the sensed temperature reaches a preset threshold. Test equipment must raise the temperature at the element without damaging the device or surrounding finish.

A heat detector that operates when temperature increases faster than a set rate. Testing must produce a rapid enough rise to trigger the element and confirm the correct panel response.

A manually operated initiating device that lets a person trigger an alarm. Testing operates it with the listed key or tool and confirms the correct alarm and annunciation.

A device that senses water movement in a sprinkler system and sends an alarm signal. Testing opens a test valve or drain to simulate flow and verifies the panel reports the zone.

A device that detects a closed valve or displaced component and sends a supervisory signal. Testing moves the valve or component and confirms the panel annunciates the supervisory condition.

A smoke detector installed in an air-handling duct to sense smoke moving through the system. Testing uses a listed aerosol at the sampling tubes and confirms alarm and shutdown functions.

The formal test performed after installation to show the system meets its design and code requirements. Results are documented and witnessed, and the system is released for use after passing.

A visual and physical check that equipment is installed correctly, accessible, and undamaged. It precedes functional testing and confirms the installation matches approved plans and manufacturer instructions.

Documentation of each device and function tested, the method used, the result, and the tester. Records support acceptance and later periodic inspections and must be retained as required.

Scheduled re-testing of devices and functions after acceptance to confirm the system still operates as designed. Intervals and methods follow the applicable code and manufacturer instructions.

A drawing updated to show the system as actually installed, including device locations and circuit routing. It is used to plan testing and compare field conditions with the design.

The relationship between a device's physical location and the label shown at the control unit or annunciator. Testing confirms each mapped label matches the actual device and zone.

The loss of voltage along notification appliance circuit conductors due to resistance. Excessive drop can make strobes or horns operate below their listed ratings, so it is checked during testing.

A measuring tool with a current calibration traceable to a standard, used for sensitivity and voltage checks. Calibration records may be requested to support test results.

A device such as a horn or speaker that produces sound to warn occupants. Testing confirms sound output is audible in the intended area and matches the design sound pressure level.

The distinctive audible or voice signal that tells occupants to leave the building. Its pattern and audibility are verified during testing to confirm it meets the approved design.