Manufactured by Cheney Instruments, the Acu-Rite 00593W wireless weather station and atomic alarm clock is self-setting, thanks to an internal radio receiver that picks up the atomic clock time signal broadcast from Colorado. Before you can take advantage of the clock's self-setting feature, you must go through a brief setup process to choose your time zone. You can also set the time manually.
Put two new AA alkaline batteries in the battery compartment of the clock's main unit. Insert two AAA alkaline batteries in the Acu-Rite weather station's remote sensor unit. Observe the polarity when installing batteries.
Press and hold the clock's "-" button for three seconds or until the letter "P" illuminates on the digital display; release the button. Press the "-" button repeatedly to scroll through the time zones; release the button when the desired time zone is displayed. Choose "P" for Pacific Time, "M" for Mountain Time, "C" for Central Time or "E" for Eastern Time.
Press the "Set" button on the clock's main unit to force it to search for the atomic time signal; the clock should adjust itself to the correct time within five minutes.