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Intermatic Support

How Do I Program My ET70000 Timer for Astronomic Sunset ON and a Fixed OFF Time?

Applies To

Intermatic ET70000 Series (Next Generation Timers).

Note: The ET70000 Series is discontinued. Intermatic agents no longer provide live technical support or replacement parts. The current production replacement is the ET90000 Series. These self-help instructions are provided so you can support your existing ET70000 timer yourself.

Question / Problem

How do I program my ET70000 timer to turn lights ON automatically at sunset using astronomic timing and OFF at a fixed time each day?

Answer

This setup is useful for outdoor or landscape lighting that should turn on automatically at dusk and turn off at a consistent time each night, regardless of the season.

If your timer already has programming that conflicts with this schedule, perform the optional reset first. Otherwise, skip to the programming steps.

Step-by-Step Resolution

Optional: Reset the Timer

  1. Prepare the Timer

    Make sure the RUN/SET switch is in the RUN position. Enable only the circuits you want to program and disable all others. Then move the RUN/SET switch to SET.

  2. Trigger the Reset

    Press and hold the CLEAR button. While continuing to hold CLEAR, press and release the RESET button (the small recessed button in the upper-left corner). Release CLEAR when the display reads RESET.

  3. Complete the Setup Wizard

    The timer prompts you for setup information. Enter each value and press OK to advance:

    • Current date (MM-DD-YY)
    • Current time (HH:MM AM/PM)
    • Time zone
    • Confirm calculated sunrise time
    • Confirm calculated sunset time

    Note: Some firmware versions prompt for day of week and current time before the date.

  4. Save the Setup

    Move the RUN/SET switch back to RUN to save the setup.

Program Astronomic ON at Sunset and a Fixed OFF Time

  1. Enter Programming Mode

    Move the RUN/SET switch to SET, then press the PROG button.

  2. Select All Seven Days

    Press ALL/0 to select all seven days of the week, then press OK.

  3. Select ASTRO ON at Sunset

    Press ASTRO once to select ON at Sunset, then press OK.

  4. Enter the Fixed OFF Time

    Enter the OFF time in HH:MM AM/PM format and press OK.

  5. Save the Programming

    Move the RUN/SET switch back to RUN to save the programming.

Tips / Additional Notes

  • This configuration turns lights ON every day at sunset and OFF at the fixed time you choose, regardless of season.
  • If your OFF time is after midnight, add a second ON event at 12:00 AM. This ensures lights resume after a power loss before sunrise.
  • For accurate sunset timing, the timer's location coordinates and time zone must be set correctly during the setup wizard.