Since the launch of the Casio PROTREK hiking watch in 1994, it has undergone multiple evolutions in dial design, appearance, and movement. Today, most Casio PROTREK watches come equipped with advanced features such as six-band global radio wave reception, a triple sensor, and an electronic compass. Don’t think simply knowing direction, air pressure, altitude, and temperature means you’ve mastered the PROTREK. In fact, fully understanding the various advanced functions of the Casio PROTREK watch can make your outdoor adventures go much more smoothly. What other hidden secrets does the PROTREK hiking watch hold? Let’s uncover them together.
CasioPRO TREK PRW-6000Y-1AOutdoor Hiking Watch
Six-Band Global Radio Wave Reception for Easy Time Synchronization Worldwide
Many outdoor enthusiasts are drawn to the Casio PROTREK’s six-band radio wave timekeeping feature. With this function, the PROTREK watch automatically adjusts its time every night via radio wave signals, avoiding the common issue of time drift in regular hiking watches over prolonged use.
Every PROTREK model equipped with six-band radio wave timekeeping can receive time calibration signals from all global radio towers. These include China’s 68.5KHz BPC signal, Japan’s 40KHz/60KHz JJY signals, North America’s 60KHz WWVB signal, and Europe’s 60KHz/77.5KHz signals. Casio is the only brand in the world offering six-band radio wave time synchronization.
But how does the PROTREK determine which country’s signal to receive? The answer lies in the user’s regional settings. When using a PROTREK watch, you first need to tell it your current city and time zone, after which the watch will automatically determine which country’s radio signal to receive. If someone else set up your radio wave timekeeping watch, be sure to check whether the region and time zone are correctly configured.
Some outdoor enthusiasts might still ask: How do I set the radio time zone when traveling abroad? Will setting the wrong region affect the final time? In fact, no matter which country’s signal is received, the watch always gets the GMT (Greenwich Mean Time). After receiving the GMT signal, the watch calculates the current local time based on your time zone. For example, if you set your current region as Shanghai and then travel to New York, the PROTREK will still try to receive the time signal from China, which will obviously fail due to lack of signal.
Casio PROTREK PRW-3000-1A Outdoor Hiking Watch
In summary, if you plan to stay in regions outside Asia for an extended period and want your watch to maintain high accuracy, you must set your current location to the corresponding region to ensure proper reception of the local time signal.
Now that we’ve covered the basics of radio timekeeping, let’s understand how the PROTREK auto-time feature works—take the Casio PROTREK PRW-5100T as an example. Once auto time is enabled, the watch will attempt to receive radio signals automatically between midnight and 5 a.m., up to six times a day, with each session lasting between 2 to 7 minutes. If the first attempt is successful, no further attempts will be made that day. To check whether the auto time sync was successful during the quiet of night, it’s quite simple—for the PROTREK 5100T, press the Mode button until “RC” appears on the screen. If a date and time are displayed next to it, the auto signal reception was successful; if underscores are shown, it means the reception failed. If your home has strong electromagnetic shielding, consider manually initiating radio reception outdoors at night for complete time accuracy.
Bidirectional Calibration Compass—No Need for Outside Help
The Casio PROTREK has long been unrivaled thanks to its triple sensor, and the electronic compass is naturally one of its key features. On any Casio PROTREK watch, there is a COMP button—press it to enter the electronic compass mode. It’s worth noting that all compasses based on geomagnetic principles actually point to magnetic north. Scientific research shows that the Earth’s magnetic field reverses every few thousand years and shifts slightly every few years (this year, the magnetic north pole is located at 82.7°N 114.4°W, in northern Canada). Every PROTREK watch is factory-set to point toward magnetic north.
Casio PRO TREK PRG-260 Outdoor Hiking Watch
The Casio PROTREK watch already includes a magnetic declination correction function—this allows users to manually input the east-west declination angle to recalibrate the compass to point to magnetic north. Alternatively, you can input the local magnetic declination to directly point to true north.
If your watch becomes magnetized, you’ll need to press MODE one more time to access bidirectional calibration, then use the COMP button to switch the calibration direction—follow the watch prompts to rotate the watch 180 degrees horizontally so it records opposite directions for calibration. However, manual rotation is rarely perfectly accurate. If you have a professional compass handy, it’s recommended to press MODE once more under bidirectional calibration and use the north calibration function to directly align the watch’s north with the direction indicated by the professional compass.
Precision Triple Sensor Delivers Essential Outdoor Hiking Data in Real Time
Thanks to high manufacturing standards and rigorous quality control, every Casio PROTREK hiking watch is equipped with a triple sensor capable of measuring temperature, air pressure, and direction. As a watch designed for the outdoors, Casio had to account for the extremely harsh environments the PROTREK may face—making temperature and air pressure correction functions essential.
The new-generation triple sensor achieves temperature and air pressure calibration precision of 0.1°C and 1 hPa respectively. If you have highly accurate professional instruments for temperature and air pressure, you can use this feature to fine-tune the PROTREK’s readings. That said, the PROTREK’s built-in air pressure and temperature sensors are already quite precise—if your reference equipment costs less than ten thousand yuan, calibration isn’t necessary.
Casio PRO TREK PRW-3000-1A Outdoor Hiking Watch
Taking the PRW-3000 hiking watch as an example, to calibrate temperature, first remove the watch from your wrist and let it sit for at least 20 minutes. Then press BARO to enter air pressure measurement mode, and long-press the ADJUST button until “Hold SET” appears on the screen—the temperature value will start flashing. Press MODE to choose whether to calibrate temperature or air pressure, then input the correct value based on your professional measuring device, and press ADJUST once to return to timekeeping mode. If you recalibrate air pressure and temperature but want to restore factory settings, simultaneously long-press the ALTI and COMP buttons in calibration mode until “OFF” appears on the screen to complete the reset.
Official Website Videos Solve All Your Problems
Given the PROTREK’s many advanced features, it’s essential to read the manual carefully after purchasing. If you have questions about some of the more advanced functions or find them difficult to use, the simplest solution isn’t to search on Baidu—it’s to go directly to the Casio official website, under Customer Support > Watches > Operation Videos (http://www.casio.com.cn/support/watguidevideo.html). Here, step-by-step video guides for most advanced functions are available, allowing you to easily perform each operation by following along.
For more information, follow CasioPROTREKHiking Watch Official Website: http://www.casio.com.cn/wat/protrek.html