| 摘要 |
A pump initiation test assembly for a sprinkler system is disclosed in which there are provided at least a pair of pressure sensors provided in the same test section of pipework within said assembly and communicating with the same chamber containing pressurised fluid within said pipework. Each of the pressure sensors has associated therewith at least two switches whose state changes simultaneously and between the same states when the fluid pressure within said chamber becomes less than an adjustable pressure threshold of the sensor. In accordance with the invention, the first switch of each switch pair is wired in series with one another and the pump so that any actuation of either switch automatically causes pump actuation. The second switches of each switch pair associated with each sensor are electrically connected, substantially independently of said first switches, and possibly independently of one another, to display means capable of indicating which of the particular sensors is actuated during a test when the fluid pressure becomes less than said threshold. Ideally, the threshold settings for each sensor are different so that the sensors are necessarily actuated at different pressure levels.
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