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A sprinkler system timer is an electrical device that is used to set an irrigation sprinkler system to come on automatically at a certain time. Irrigation timers first appeared in the early 1960s to control large-radius lawn sprinklers, which at the time usually contained their own electrically operated valve (most golf-course sprinklers still use this type of actuation).
Most automatic irrigation valves are diaphragm valves in which the water above the diaphragm must be discharged for the valve to open. In a hydraulic system, the controller and valves are connected via small plastic tubes approximately 4 mm (¼ in) in diameter. The controller opens the tube connected to the valve, allowing that valve to open ...
James Hardie (27 July 1851 – 20 November 1920) [2] emigrated to Australia in 1888 from Linlithgow, Scotland, and established a business importing oils and animal hides. Andrew Reid, also from Linlithgow, came to join Hardie in Melbourne, and became a full partner in 1895. [3] When Hardie retired in 1911, he sold his half of the business to ...
Fault detection, isolation, and recovery (FDIR) is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. Two approaches can be distinguished: A direct pattern recognition of sensor readings that indicate a fault and an analysis ...
Orbit Irrigation Products, Inc, located in Salt Lake City, UT, United States, is a manufacturer and supplier of irrigation products for residential and commercial markets and has been in business since 1986. It distributes over 2,000 products to 40 countries on five continents.
Control charts are graphical plots used in production control to determine whether quality and manufacturing processes are being controlled under stable conditions. (ISO 7870-1) [1] The hourly status is arranged on the graph, and the occurrence of abnormalities is judged based on the presence of data that differs from the conventional trend or deviates from the control limit line.
A proportional–integral–derivative controller (PID controller or three-term controller) is a feedback-based control loop mechanism commonly used to manage machines and processes that require continuous control and automatic adjustment.
The 1987 James Hardie 1000 was an endurance race for Group A Touring Cars, staged on 4 October 1987 at the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia. The race was the eighth round of the inaugural World Touring Car Championship , and was the 28th in a sequence of Bathurst 1000 races, commencing with the 1960 Armstrong ...