The HQ9 Series Percentage Timer is an accurate, economical, enclosed percentage timer designed for use in applications where a repetitive “on” time of a fixed cycle needs to be variable. The HQ9 provides efficient control for many industrial applications. These include: motion control, electric heaters, ovens, program temperature controls, chemical feeding, and lubrication systems. Settings can be adjusted during timer operation.
A synchronous motor driven cam closes a snap action switch for a percentage of the total time cycle. Settings may be made or changed with the timer operating. Relationship of switch transfer point at zero and desired interval is made by adjustment of the setting pointer. As the progress pointer passes zero, the load switch transfers. The HQ9 continues to operate as a repeat cycle timer as long as power is supplied to the motor. ON time is adjustable from 5% to 100% of the total time range. Load connections are made to terminals 4 and 3.