The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Set up a Pro Trek by identifying its module number first, then following the operation guide for that exact module. Casio changes button assignments, menu paths, and even the compass-calibration method between modules: module 3513 uses buttons, module 5470 uses its crown for compass calibration, and module 5601 documents figure-eight and two-point methods. Treat the procedures below as a module-aware guide, not as one universal button sequence.
Before using the watch on a route, calibrate the compass away from magnetic interference, set the altimeter to a known local elevation, and leave the barometric-pressure offset unchanged unless a dependable reference proves it is substantially wrong.
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1. Identify the module before pressing any buttons
Turn the watch over and look for the module number engraved on the case back. Casio publishes a separate operation guide for each module, and the same-looking Pro Trek controls can perform different actions on different watches. Use Casio Support to select the guide whose module number exactly matches the engraving.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesDo not infer a procedure from a similar model. For example, module 3513 starts compass calibration with a button held in Compass Mode, whereas module 5470 uses the crown. Module 5601 offers two different calibration approaches. A sequence that is correct for one module can open another function, cancel calibration, or leave an offset unchanged on yours.
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Read the guide before setup
Identify the names Casio uses for Compass Mode, Altimeter Mode, calibration, reference altitude, and pressure offset. Note whether the watch expects a short press, a long press, a crown rotation, a crown push, or a change in crown position. Check the units shown for altitude and pressure before entering any value. Keep the guide available while you work; a familiar-looking bezel is not proof that its controls match another Pro Trek.
If the case-back engraving is difficult to read, clean the back gently and check the watch documentation or the product support page for the same module number. Do not choose a manual by appearance alone. The examples in this guide illustrate documented differences, not a replacement for the manual for your watch.
What to have ready
- Your exact module number and its Casio operation guide.
- A location away from magnets, metal structures, high-voltage wires, aerial wires, electrical appliances, and other strong magnetic sources.
- A trustworthy elevation reference: a surveyed elevation marker, a good topographic map, or reliable local information for the point where you are standing.
- Enough time to hold the watch level and complete each calibration without rushing.
- A note of the reference elevation, units, location, and time if you will compare readings during a trip.
2. Understand what each sensor is measuring
Compass
The compass senses Earth’s magnetic field and displays a magnetic direction. Nearby magnetic material or electrical equipment can distort that field. A clean calibration cannot compensate for standing beside a vehicle, a steel railing, a speaker, a power line, or another strong source of interference.
Calibration teaches the watch how to interpret the local magnetic field; it does not remove magnetic interference from the place where you later take a reading. If a bearing changes suddenly when you move beside a vehicle or powered device, take the reading again in an open area.
For serious trekking, climbing, or navigation, carry another compass and use it to confirm an unexpected bearing. Casio’s module 5601 guidance specifically recommends a second compass for serious mountain activities.
Altimeter
The altimeter estimates relative altitude from barometric pressure. It is not directly measuring height above sea level. Weather systems, changing pressure, and temperature can therefore make the displayed altitude differ from the elevation on a map or marker, even when the watch is functioning normally.
Setting a known reference altitude removes a starting offset. It does not convert the watch into a surveying instrument, and it does not make a reading immune to later pressure changes. The most useful field interpretation is often the trend—whether you are gaining or losing elevation—checked against known points whenever possible.
Barometer and pressure offset
Casio states that the pressure sensor is factory-adjusted and normally needs no user calibration. The pressure offset exists for correcting a major, demonstrated error against a dependable reference—not for fine-tuning an approximate value or making a forecast agree with a weather app.
Because pressure is also the input used for relative altitude, an incorrect pressure offset can make both pressure and altitude information misleading. Leave the factory setting in place unless the module guide and a trustworthy comparison justify an adjustment.
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3. Prepare a safe location for compass calibration
Move to an open area before starting. Put the watch away from the objects most likely to corrupt a magnetic reading:
- Magnets and magnetic clasps
- Large metal structures, vehicles, fences, and benches
- High-voltage and aerial wires
- Electrical appliances and powered equipment
Remove the watch from a backpack pocket containing a magnetic closure or electronic device. Keep the watch horizontal when the guide calls for a level position. If the display reports an error, do not assume the sensor is defective; first move farther from interference and repeat the module-specific retry procedure.
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Choose a place where you can turn or move the watch without hitting anything. Keep your hands, phone, keys, and other magnetic objects away from the case while the calibration is running. Complete the entire sequence in one attempt; interrupting it or combining instructions from two modules can leave the calibration unfinished.
4. Calibrate the compass for your module
Compass calibration normally establishes how the watch interprets the local magnetic field. The exact control method is module-dependent.
Module 3513: two-point button calibration
Casio’s module 3513 procedure uses Compass Mode and two calibration points. Follow these steps only if the case back says 3513:
- Enter Compass Mode.
- Hold E for at least two seconds until the compass-calibration screen appears.
- Keep the watch horizontal and press C to calibrate the first point.
- When prompted, rotate the watch 180 degrees.
- Press C again to calibrate the second point.
- Wait for the success indication before leaving the calibration screen.
If the watch reports an error, use the retry instruction in the module 3513 guide. Repeat in a less magnetic location rather than repeatedly pressing buttons in the same contaminated spot. Do not move to the second point before the watch prompts you, and do not assume that a partially completed sequence has been saved.
Module 5470: crown-controlled calibration
The module 5470 guide uses the watch’s crown for compass calibration. Do not substitute the module 3513 button sequence. Open Casio’s Calibrating Compass Readings — Module No. 5470 PRO TREK guide, enter Compass Mode as shown there, and use the crown exactly as directed. Keep the watch in the orientation requested by the guide and wait for its completion indication.
The crown may also have a push, pull, or rotation state that changes the command. Guessing at those states risks changing another setting instead of calibrating the sensor. If the operation guide calls for a particular crown position, set that position before beginning and return it as instructed when the procedure ends.
Module 5601: figure-eight or two-point method
Module 5601 documents both a figure-eight calibration and a two-point calibration. Select the method described by the on-screen prompt and the Calibrating Compass Readings — Module No. 5601 PRO TREK guide. The figure-eight method requires controlled movement through the prescribed pattern; the two-point method requires changing the watch’s orientation and confirming each point.
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Keep the movement smooth and complete the full sequence. If the watch signals an error, relocate away from magnetic sources and restart according to the guide rather than combining parts of the two methods. After a successful indication, take a test bearing in the same open area and then another after moving a short distance to check for obvious interference.
Other modules, including 5673
Casio also provides a compass-calibration guide for module 5673. Because the available documentation does not establish one universal motion or button sequence for every Pro Trek module, use the guide selected by your own module number. The same rule applies to any module not listed above.
5. Set an altitude reference before relying on the altimeter
Start at a place whose elevation is known. Good references include a permanent elevation marker, a detailed map, or reliable local information for the exact location. A guessed elevation creates an offset that can follow you for the rest of the outing.
Generic workflow
- Reach the reference point and note its published elevation and units.
- Open the watch’s Altimeter Mode.
- Choose the altitude-reference or altitude-offset setting described in your module guide.
- Enter the known elevation using the watch’s controls. Confirm the units and decimal or increment format before saving.
- Return to the normal altitude display and verify that it is close to the reference value.
The control sequence, labels, and adjustment range vary by module. Use the matching guide rather than assuming that a button marked for compass calibration also changes the altitude offset. If the marker gives an elevation in a different unit, convert it carefully before entry and confirm the watch’s displayed unit after saving.
Update the reference during a trek when you can
Pressure can change while you travel. When you pass a reliable elevation marker or another trustworthy reference, compare the watch with it and update the offset if the difference is attributable to pressure drift rather than an incorrect map location. Record the reference point and time if you need to interpret an altitude log later.
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Do not reset the reference at an arbitrary viewpoint simply because the displayed value looks surprising. Without a known elevation, changing the offset can hide a weather-related pressure change instead of correcting the watch. If the route returns to a known point, use that point as a check before making another adjustment.
6. Leave pressure calibration alone unless the evidence justifies it
Casio describes the pressure sensor as factory-adjusted. For normal use, there is nothing to calibrate. The module 5470, 5602, and 5673 support material describes an offset procedure for a major error, but it also warns that an incorrect setting makes subsequent readings wrong.
When an adjustment is justified
- You have a dependable pressure reference measured at the same place and time.
- The watch shows a substantial, repeatable difference rather than a single changing-weather reading.
- You have confirmed that the watch is operating in the correct mode and units.
- You are following the pressure-offset instructions for the exact module, not a similar-looking model.
Only then should you open the pressure-calibration function in the matching module guide and enter the documented offset. Never use an approximate number copied from an unrelated station, a forecast, or a phone whose elevation and sensor conditions are unknown. If you cannot establish a trustworthy comparison, leave the factory setting untouched and interpret the variation as an environmental effect.
7. Use readings intelligently in the field
Compass checks
Take a bearing in an open area, then check it again after moving away from metal or powered equipment. A sudden change near a vehicle or cable is more likely interference than a real change in direction. For critical navigation, compare with a separate compass and with terrain features or a map.
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Hold the watch in the orientation required by the module guide and avoid taking a critical bearing while the case is touching a railing, pack frame, phone, or other metal object. A calibration completed indoors may still be unsuitable if the building contains substantial steel or electrical equipment.
Altitude checks
Interpret the altimeter as a relative trend: gaining or losing height over a route. Compare it with known points when available. A stable walk can still produce a changing display if atmospheric pressure changes, and a stationary watch can show a different altitude later in the day because the pressure field changed.
Temperature and pressure effects
Casio identifies changing barometric pressure and temperature as causes of differences between the watch’s altitude and actual elevation. Calibration reduces an avoidable starting error; it cannot remove those environmental effects. Avoid treating a single displayed number as proof of sea-level elevation or survey-grade accuracy.
8. Module differences at a glance
| Module | Compass setup documented by Casio | Important control difference | Source guide |
|---|---|---|---|
| 3513 | Two-point calibration | Hold E for at least two seconds; press C for each point | Casio Support, “Calibrating Compass Readings — Module No. 3513 PRO TREK” |
| 5470 | Module-specific compass calibration | Uses the crown; do not substitute the 3513 button sequence | Casio Support, “Calibrating Compass Readings — Module No. 5470 PRO TREK” |
| 5601 | Figure-eight or two-point calibration | Select and complete the method shown in the module guide | Casio Support, “Calibrating Compass Readings — Module No. 5601 PRO TREK” |
| 5673 | Compass calibration guide provided | Follow the procedure for the engraved module number | Casio Support, “Calibrating Compass Readings — Module No. 5673 PRO TREK” |
This table compares documented procedures, not sensor accuracy or performance. The available material does not establish a controlled accuracy comparison among these modules. The practical difference is the control method: button-based, crown-based, or a choice of movement patterns.
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The compass calibration fails
- Move outdoors or farther from metal, magnets, wires, and electrical appliances.
- Confirm that the watch is horizontal or in the orientation required by your module.
- Restart the exact calibration sequence in the module guide.
- For module 5601, complete either the figure-eight or two-point method as a whole; do not mix them.
- Check that you are using the correct crown position or button hold for the engraved module.
The compass points differently near equipment
Move away from the equipment and take a second reading. Magnetic interference is the expected explanation when the bearing changes near a vehicle, structure, appliance, or wire. Confirm important directions with another compass. Recalibrating beside the same source will not solve the underlying interference.
The altitude is wrong at a known marker
- Check that the marker refers to your exact location and uses the same units.
- Verify that you are in Altimeter Mode and that the altitude reference was saved.
- Reset the reference using the marker’s elevation if it is trustworthy.
- Consider recent weather and temperature changes before changing any pressure offset.
- Compare again at another reliable point before concluding that the sensor has failed.
The pressure value seems wrong
Do not immediately recalibrate. Confirm the reference instrument, location, time, units, and whether the difference is repeatable. Adjust only when a major error is demonstrated and the matching module guide supports the correction. An incorrect offset can create new errors even if the original discrepancy was caused by weather.
A sensor still shows an error after correct setup
Stop guessing at settings. Recheck the module number and guide, repeat the procedure in a suitable location, and then contact Casio support or an authorized service provider if the error persists. Do not treat repeated failed calibration as evidence that a different module’s procedure will work.
10. A pre-trip setup checklist
- Read the module number on the case back.
- Open the corresponding Casio operation guide.
- Confirm the control type and units used by that guide.
- Calibrate the compass in a magnetically clean location.
- Confirm the compass with a second compass for serious trekking or climbing.
- Find a known elevation and set the altitude reference in Altimeter Mode.
- Record the reference point if you are tracking a route.
- Leave the pressure offset at its factory setting unless a dependable comparison proves a major error.
- Carry the module guide or its instructions when the route depends on the sensors.
11. What the watch can—and cannot—tell you
A calibrated Pro Trek is useful for directional bearings and for following relative elevation changes. It is not a replacement for a navigation plan, a map, a second compass, or surveyed elevation data. Casio’s module 5601 guide states: “This watch is not a special-purpose measuring instrument. Measurement function readings are intended for general reference only.” That qualification applies to how you should use the readings: as informed reference data, with environmental conditions and local verification in mind.
If your model is not 3513, 5470, 5601, or 5673, the safe path is still the same: identify the module, use its own operation guide, calibrate away from interference, establish altitude from a known reference, and avoid changing pressure settings without reliable evidence.
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Frequently Asked Questions
Where do I find my Pro Trek module number?
Turn the watch over and read the number engraved on the case back. Use that exact number to select Casio’s operation guide; model appearance alone is not enough.
Can I use the module 3513 compass steps on a module 5470?
No. Module 3513 uses button operations, while module 5470 uses the crown. Follow the guide for the number engraved on your watch.
How do I calibrate a module 3513 compass?
Enter Compass Mode, hold E for at least two seconds, keep the watch horizontal, press C for the first point, rotate the watch 180 degrees, press C again, and wait for the success indication. Repeat away from magnetic interference if an error appears.
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Why does compass calibration fail?
Magnets, metal structures, vehicles, high-voltage or aerial wires, and electrical appliances can interfere. Move to an open area, keep the watch in the required orientation, and restart the complete module-specific procedure.
How do I set the altitude on a Casio Pro Trek?
Stand at a location with a known elevation, open Altimeter Mode, choose the altitude-reference or offset setting in your module guide, enter the published value in the correct units, save it, and verify the display.
Why does the altitude change while I am standing still?
The altimeter derives relative altitude from barometric pressure. Weather-related pressure changes and temperature changes can alter the displayed altitude even when your elevation has not changed.
Should I calibrate the barometric-pressure sensor?
Usually no. Casio says it is factory-adjusted. Change the pressure offset only for a major, repeatable error confirmed against a dependable reference and only with the exact module procedure.
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For serious trekking, climbing, or mountain navigation, yes. Casio’s module 5601 guidance recommends carrying another compass so you can confirm an unexpected bearing.
What should I do if the sensor still shows an error?
Recheck the module number, repeat the matching procedure away from interference, and contact Casio support or an authorized service provider if the error continues. Do not guess at settings from another module.
The Bottom Line
Start with the module number, not a generic button sequence. Calibrate the compass in an interference-free area using that module’s exact method, set altitude from a known reference, and leave the pressure offset alone unless reliable evidence shows a major error. Treat compass and altimeter readings as useful general-reference information, verify critical directions with another compass, and contact Casio support if a correctly followed procedure still fails.
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