| 摘要 |
<p>PURPOSE:To test a detector from a receiver side by making the fire detector which is selected by an address signal and receives a test instruction generate a test voltage and supply it to a detecting part, etc., and return a level at that time. CONSTITUTION:In a case that an address detection circuit 5 receives a test signal following the address signal, it supplies a prescribed testing voltage TV to the detecting part 3 or a coding circuit 6. Then, because when a test is performed, the code signal of a level to be a standard by the testing voltage is returned to a receiver, the disorder, etc., of the sensitivity setting of the detecting part 3 can be checked according to the returned signal, and the function test of all the detectors related to a circuit can be performed at the receiver side. Besides, when the testing voltage is generated step by step, the operating characteristic of the fire detector can be easily tested as well.</p> |
