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公开(公告)号:US4007713A
公开(公告)日:1977-02-15
申请号:US608552
申请日:1975-08-28
CPC分类号: H01T13/60 , F22B37/443 , F22B37/46 , G01R31/2829
摘要: A test circuit for use with a boiler control circuit. A test switch and a lamp are connected between ground and a water level electrode. In the presence of a water path, a sufficient potential drop exists between ground and the electrode to light the lamp when the test switch is closed. If a ground or short exists, the lamp will not light.
摘要翻译: 用于锅炉控制电路的测试电路。 测试开关和灯连接在地面和水位电极之间。 在水路存在的情况下,当测试开关闭合时,地面和电极之间存在足够的电位降低以点亮灯。 如果存在接地或短路,则指示灯不亮。