Sharp Atomic — Clock Spc373 User Manual

The SPC373 includes a built-in thermo-hygrometer sensor. Once batteries are inserted, it will automatically display:

To toggle Celsius/Fahrenheit: Press the ▲ button once.

Note: If the temperature reads "HH.H" or "LL.L", the sensor is outside its operating range or damaged.

If you cannot receive the atomic signal (e.g., remote area, interference), set the time manually. sharp atomic clock spc373 user manual

Button reference (exact labels may vary slightly – typical for Sharp):

Once powered, the display is divided into four zones:

| Zone | Display Info | Icons You’ll See | |------|--------------|------------------| | Top Left | Time & Alarm | AM/PM or 24H, Alarm 1 Icon (bell), Alarm 2 Icon (bell with “2”) | | Top Right | Calendar | Month, Date, Day of week (MON, TUE, etc.) | | Bottom Left | Indoor Temp | °F or °C, temperature value | | Bottom Right | Humidity | RH% (Relative Humidity) | The SPC373 includes a built-in thermo-hygrometer sensor

Signal Icon: A radio tower icon with waves.

DST Indicator: Shows “DST” when Daylight Saving Time is active.

  • DST ON/OFF: Choose AUTO for automatic DST, or OFF for manual.
  • 12H or 24H format: Choose with +/-.
  • Hour flashes → adjust → press SET.
  • Minute flashes → adjust → press SET.
  • Press SET to exit.

    • Note: Manually setting time disables atomic sync until the next automatic search or manual re-sync. To toggle Celsius/Fahrenheit: Press the ▲ button once

    Solution: You are in the wrong time zone. Press and hold SET until you reach the "ZONE" setting. Change from "P" to "E" if you live in New York.

    The SPC373 listens for the WWVB signal from Colorado. This signal is extremely low frequency (60 kHz) and travels best at night.