Sharp Atomic Clock Spc373 User Manual Better Page

Sharp Atomic Clock Model SPC373: Precision Timekeeping User Manual

Congratulations on your purchase of the Sharp SPC373 Atomic Clock. This device represents a fusion of traditional analog aesthetics and 21st-century radio-controlled accuracy. Unlike standard quartz clocks that can drift seconds per month, the SPC373 synchronizes itself daily with the atomic clock of the National Institute of Standards and Technology (NIST) in Fort Collins, Colorado (or equivalent regional transmitters in Europe/Japan for export models).

This manual will guide you through installation, feature utilization, and maintenance to ensure your clock remains accurate to within one second per million years. sharp atomic clock spc373 user manual

Troubleshooting the Sharp SPC373

Step 3: Radio Signal Acquisition

• The clock immediately begins searching for the WWVB atomic signal. The signal strength indicator (often a small antenna icon on the dial near 6 o’clock) will flash.
• First sync may take 5–15 minutes. Place the clock overnight on a north-facing window (best signal) away from electronics, metal, or concrete walls.
• Once synchronized, the hands will rapidly advance to the correct local time. The antenna icon becomes steady.

6. Manual Time Setting (No Atomic Signal)

If you live in an area without WWVB coverage (e.g., remote Alaska, deep valley), you can disable atomic sync and set time manually: Sharp Atomic Clock Model SPC373: Precision Timekeeping User

1. Press and hold “SET” and “+” simultaneously for 5 seconds until the antenna icon disappears.
2. Press “SET” repeatedly to advance hour/minute in 1-minute increments. Hold for fast advance.
3. To re-enable atomic sync: Remove batteries for 10 minutes and reinsert.

What's in the box

• SPC373 clock (body with display)
• AC adapter (or battery compartment cover if battery-powered)
• Quick-start leaflet / user manual
• Warranty card