Timers automatically starts or stops a system, machine, or apparatus used in industry or the home. The term “timer” is also applied to a monitoring device that signals when such a system,machine, or apparatus is to be started or stopped.
Timers based on clocks have the highest accuracy and reliability, as well as the broadest range of time intervals. Clockworks are used mostly in single-shot and multi shot timers designed for operation within a 24-hour period.
Depending on the principle of operation, a timer can be mechanical, hydraulic, pneumatic, or electrical. The time interval of a timer is usually predetermined in the same way as in a timing relay.
Electric and electronic time measurement devices are used mostly in repeat-cycle timer that function continuously over periods of several months.
The first step to setting your timer is setting it with the time that it currently is. This allows the timer to turn on when you want it to and off when you want it to. To set the current time, turn the dial on the face or set the digital display.
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