Verify the timezone switch on the back is set correctly.
Locate the battery door on the back of the clock and slide it open.
Sharp Atomic Clock SPC373 Go to product viewer dialog for this item.
Press and hold the button for 2 seconds. The alarm hour digits will begin flashing. Press UP or DOWN to select your desired alarm hour.
Use the UP or DOWN buttons to change the year. Press SET to confirm. sharp atomic clock spc373 user manual
Use the (▲) or DOWN (▼) buttons to adjust the flashing value.
: Use high-quality alkaline batteries. If the display dims or the outdoor sensor stops reporting, replace the batteries in both units.
: Ensure the Daylight Saving Time (DST) switch is set to ON if your area observes it.
: Press the ALM ON/OFF button to enter Alarm 1 or Alarm 2 mode. Press and hold ALM ON/OFF until the hour flashes, adjust with UP/DOWN , and press again to set minutes. Verify the timezone switch on the back is set correctly
Pacific (P), Mountain (M), Central (C), Eastern (E) Backlight: Temporary blue LED backlight Initial Setup and Battery Installation
Once your settings are saved, the clock begins its search. The SPC373 is designed to receive the WWVB time signal broadcast from Fort Collins, Colorado.
: Hold for 3 seconds to manually toggle the 915 MHz signal reception for the outdoor sensor. Manual Time Setting
The alarm will stop sounding and ring again after 5 minutes. Press and hold the button for 2 seconds
Requires 2 AA alkaline batteries (not included). Backup power is not required as settings are stored, and the atomic signal restores time after battery replacement. Initial Setup and Battery Installation
: Insert fresh alkaline AA batteries into the main unit and the remote sensor (if applicable).
Then, a miracle. At precisely 2:00 AM, as promised on page 3, the clock attempted a signal sync. The antenna icon flickered. Arthur held his breath. The world’s atomic clocks had long been silent… or so he thought.
The control buttons are located on the back of the clock. Understanding their layout makes custom programming straightforward:
