Automatic Timing and Controls % Timer Model 304G
Percentage Timers work by turning on a load for a percent of the dial Range.
If you have a 60 second (1 minute) percentage timer and set the dial to 50%, the timer will be on for 30 seconds and of for 30 seconds. If the dial is set to 75% then the load is on for 45 seconds and off for 15 seconds. Percentage timers start their cycling function when the control switch closes. As long sat the switch remains closed, the load continues to turn on and off at regular intervals. This cycling stops when the control switch is open. A recycle timer is similar and comes in 2 types; equal on and off times and different on and off times also know as a flip flop timer. A Flip Flop timer can have an ON time in seconds and an off time in Hours or vice versa. See ATC 422AR Flip Flop Timer.
The ATC 304G solid-state percentage timer comes standard in a 120 SEC range with 15 SEC, 30 SEC, 60 SEC user configurable ranges. Additionally, all second ranges can become minute ranges by cutting jumper J0. The 304G is easily panel mounted with 4 screws. It utilizes an integrated circuit technology for high accuracy timing.
CONTACTS: The relay contact is capable of switching 10 A to a resistive 120 VAC or 30 VDC load. It is capable of driving a 1/3 HP load at 120 VAC.
CYCLE PROGRESS INDICATION: The 3O4G has a pilot light that is on solid during the relay off time. It blinks at a faster rate during the relay on time: once every 3.5 seconds during the first 10% of the cycle, twice during the second 10% and so on.
HIGH ACCURACY: The ATC 304G's timing circuit is not a simple RC circuit. It utilizes the sophistication of a proprietary integrated circuit that includes counting technology along with a stable oscillator to provide repeatable time delays.
CONVENIENT ADJUSTMENT: Graduated in easily read 1% increments, the ATC 304G provides continuous adjustment of on time between 5 and 95%.
The ATC 304G comes standard in the 120 SECOND range but is user configurable for the 15 SEC, 30 SEC, 60 SEC by cutting jumpers from the PC board. Each of these ranges can also be made minutes range by cutting a jumper. Its solid-state circuitry repeatedly closes the SPST load switch for a percentage of the time cycle, as set on the timer dial, and opens it for the remainder of the cycle.
When the dial pointer is set below 3%, the load switch stays open for the full cycle; it remains closed when the pointer is set above 98%. This is true for all seconds ranges. Minute ranges have a 0.01% minimum.
If power is interrupted to the 304G percentage timer it will reset. When power is restored, the 304G will begin a new time cycle.
Percentage Timers are found in industrial plants, waste water plants, agriculture processes, irrigation, stadiums and steel processes.
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ATC 304G400Q00XX Percentage Timer
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