Duct detector with improved functional test capability
First Claim
1. A method for testing the functionality of a duct detector comprising:
- activating a test light located in a main housing of the duct detector using a control device that is remote from the main housing, wherein the main housing is attached to a ventilation duct;
at a light detector located in a detector housing within the main housing, receiving a portion of light emitted from the test light, wherein the received light passes through a plurality of labyrinth members positioned between the test light and the light detector;
determining if the light received at the light detector exceeds a predetermined threshold; and
signaling an alarm when the light received at the light detector exceeds the predetermined threshold.
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Accused Products
Abstract
A device and method for facilitating convenient functional testing of a duct detector is provided. The device includes a duct detector having a remote-controlled test light mounted in a housing thereof, and a detector chamber defined by a filter screen and a plurality of labyrinth members that allow light emitted by the test light to enter the detector chamber. A functional test of the duct detector can be conducted by activating the test light. If the detector is functioning properly, an amount of light emitted by the test light will be detected by the light detector, thereby simulating the presence of an excessive amount of particulate within the detector chamber. The light detector will then generate an output signal that will cause the actuation of alarms and/or the deactivation of a blower system, thereby indicating functionality of the duct detector.
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Citations
10 Claims
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1. A method for testing the functionality of a duct detector comprising:
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activating a test light located in a main housing of the duct detector using a control device that is remote from the main housing, wherein the main housing is attached to a ventilation duct; at a light detector located in a detector housing within the main housing, receiving a portion of light emitted from the test light, wherein the received light passes through a plurality of labyrinth members positioned between the test light and the light detector; determining if the light received at the light detector exceeds a predetermined threshold; and signaling an alarm when the light received at the light detector exceeds the predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 9, 10)
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6. A method for testing the functionality of a duct detector comprising:
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activating a test light located in a main housing of the duct detector; at a light detector located in the housing, receiving a portion of light emitted from the test light, wherein the received light passes through a plurality of labyrinth members positioned between the test light and the light detector; receiving an output signal from the light detector and comparing the output signal to a predetermined threshold signal level; signaling an alarm when the light received at the light detector exceeds the predetermined threshold; and calibrating the test light to emit a predetermined amount of light, wherein the predetermined amount of light is sufficient to generate an output signal that exceeds the predetermined threshold signal level when a filter screen of the duct detector is in a clean condition. - View Dependent Claims (7, 8)
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Specification