Since 1813, Seth Thomas Clocks have worked to advance time-keeping technology. In their version of an atomic clock, Seth Thomas uses an internal chip to offer the same autosetting features of true, radio-controlled atomic clocks. Using an internal chip is particularly beneficial to customers who have difficulty using traditional radio-controlled atomic clocks due to interference caused by televisions, computers and many common building materials.
Place your Seth Thomas atomic clock face-down on a table or desk and locate a series of buttons labeled "PST," "MST," "CST" and "EST" on the back of the clock. Press the appropriate button to set the time zone.
Turn your attention to the small lithium battery-powered digital clock display on the back of your clock. With the correct time zone set, the digital display should accurately reflect the current local time.
Locate the AA battery compartment on the back of your clock. Put two new AA batteries into your clock's battery compartment.
Set the "Mode" switch on the back of your Seth Thomas atomic clock to "Run." Wait for it to adjust to the correct time. The automatic time-adjustment process can take up to 45 minutes, but is usually completed much sooner.