This is a Casio watch manual. It can set time, date, alarm and other functions. It can also measure direction and temperature.
The Casio 3157 watch includes a built‑in magnetic direction sensor and temperature sensor, making it useful for outdoor activities such as hiking and climbing. The manual describes the functions, warnings, and proper handling of the sensor data.
The guide covers operation modes (timekeeping, world time, stopwatch, countdown timer, alarm, digital compass/temperature), how to set city codes, adjust daylight‑saving time, calibrate the compass and temperature sensors, and troubleshooting tips for inaccurate readings. This manual is written in Chinese.
| Temperature display range | -10.0°C to 60.0°C (or 14.0°F to 140.0°F) |
|---|---|
| Temperature display resolution | 0.1°C (or 0.2°F) |
| Direction measurement interval | 1 second, up to 10 seconds |
| Temperature measurement interval | 2 seconds, up to 10 seconds |
| Angle error tolerance | ±11° |
Nearby high‑voltage power lines generate magnetic interference that changes the reading.
Indoor objects such as TVs, computers, and speakers emit magnetic fields that interfere with the compass sensor.