This manual introduces the use of the CASIO watch 3147, including how to keep the watch in contact with bright light, the functions of the watch, how to specify the city of residence, and how to use the atomic timekeeping function
This manual explains how to operate the Casio 3147 watch, including power management with its built‑in solar cell, time and date setting, and the use of advanced functions such as altitude, pressure and temperature measurement. Detailed procedures are given for each function and for troubleshooting common issues.
The document also contains reference tables for city codes, altitude reference heights, and pressure/temperature conversion, as well as safety notes for the automatic illumination and power‑saving features. This manual is written in Japanese.
| Charging time (dim indoor light) | ≈50 minutes |
|---|---|
| Pressure measurement range | 260 hPa – 1 100 hPa |
| Temperature measurement range | −10 °C – 60 °C (14 °F – 140 °F) |
Enter the city code using the control keys as described in the "時間校準" section; the manual provides a City Code Table for reference.
When the watch detects low light for a set period, it automatically enters a sleep state to conserve battery; the function reactivates when sufficient light is detected again.