Casio PRT-70, 700, 71 Watch User Manual

Introduction and Features

This document serves as a user manual for Casio watches, specifically detailing operations for models in the PRT-70, PRT-700, and PRT-71 series, utilizing modules such as 2307, 2335, 2555, and 2557. The watches offer a range of functions including timekeeping, stopwatch, countdown timer, alarms, and environmental sensing capabilities like altimeter, barometer, and thermometer.

Key operational elements are often indicated by symbols like '', which represent buttons or display indicators. These will be described textually as [Button] or [Indicator]. Display modes may be indicated by Roman numerals (I, II, III, IV, V) or letters (e.g., 'D' for day/date, 'C' for a specific function).

Operating Instructions

Timekeeping and Calendar

1. Setting Time and Date:
   • Press the button labeled "[Button D]" to cycle through display modes.
   • Press the button labeled "[Button C]" for specific functions or to enter setting modes.
   • To set the time: Enter the time setting mode (often by holding a button). Use buttons to adjust seconds (reset to 00), minutes, hours, year, month, and day.
   • The watch supports both 12-hour (with AM/PM indicators) and 24-hour time formats.
2. Alarms:
   • Set daily alarms by selecting the alarm number and inputting the desired hour and minute.
   • Enable or disable alarms using a designated button. An alarm indicator will appear on the display when active.
   • An hourly time signal may also be available.
3. Stopwatch:
   • Measure elapsed time, split times, and 1st/2nd place times.
   • Operated via start, stop, and reset buttons. Lap times can be recorded.
   • Measuring capacity typically up to 100 hours, with precision of 1/100 second for the first 60 minutes.
4. Countdown Timer:
   • Set a countdown duration from 1 minute up to 24 hours.
   • The timer counts down to zero and may sound an alarm. An auto-repeat function may be available.
5. Altimeter:
   • Measures altitude, typically in meters (m) or feet (ft).
   • Measurement range: -700 to 6,000 meters (-2,300 to 19,680 feet).
   • May require setting a reference altitude for calibration.
   • Uses atmospheric pressure data (potentially referencing ISA/ICAO standards) for altitude calculation.
6. Barometer:
   • Measures atmospheric pressure, typically from 260 to 1,100 hPa (hectopascals) or 7.67 to 32.46 inHg (inches of mercury).
   • May display a pressure trend graph to help predict weather changes.
7. Thermometer:
   • Measures ambient temperature, typically in Celsius (°C) or Fahrenheit (°F).
   • Measurement range: -10.0 to 60.0 °C (14.0 to 140.0 °F).
8. EL Backlight:
   • Activates an electro-luminescent backlight for display visibility in low light conditions, usually via a dedicated [EL Button].
9. Other Operations:
   • The watch may include a counter (CNT) function.
   • Data logging or memory functions might be present for storing readings.
   • Battery type is typically CR1620, with an estimated life of approximately 2 years.
   • Error indicators like "[Err]" or "-----" may appear, requiring troubleshooting.
   • Calendar functions cover the range of years from 1995 to 2039.

Specifications

Manufacturer Information

Manufacturer: CASIO COMPUTER CO., LTD.

Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan