This manual provides step‑by‑step instructions for preparing the Casio 5012 watch, configuring the automatic time calibration, using the countdown timer, and switching between functions such as the second‑hand mode. It also describes the solar‑charging capability and how to set the residence city for accurate timekeeping.
Additional sections cover power‑saving behavior when the watch is kept in darkness, battery handling, troubleshooting tips, and safety precautions for long‑term use. The document includes diagrams and tables to aid users in proper operation and maintenance. This manual is written in Japanese.
| Power‑saving activation | After about 1 hour in darkness |
|---|
Place the watch in a dark environment for about one hour; the hands will stop moving and the watch enters sleep mode.
Use the timer setting method described in the manual to adjust the countdown timer time.
Only use the dedicated rechargeable battery; do not replace it with other battery types to avoid damage.