CASIO PRG50BC-1V
Owner's Manual

USER�S GUIDE 2471
Precautions about bidirectional calibration � You can use any two opposing directions for bidirectional calibration. You must, however, make sure that they are 180 degrees opposite each other. Remember that if you perform the procedure incorrectly, you will get wrong bearing sensor readings. � Do not move the watch during the one or two seconds (from the point you press B up to the point that OK appears in the upper display area) that the calibration of each direction is in progress. � You should perform bidirectional calibration in an environment that is the same as that where you plan to be taking direction readings. If you plan to take direction readings in an open field, for example, calibrate in an open field.

To calibrate the temperature sensor

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1. Press C to enter the Barometer/ Thermometer Mode. 2. Hold down A until either OFF or a temperature value (if set) starts to flash, which indicates the setting screen. 3. Press E (+) or B (�) to change the displayed temperature by 0.1°C (or 0.2°F). � Pressing B and E at the same time returns to the factory calibration (OFF). 4. Press A to return to the Barometer/ Thermometer Mode screen.

To perform bidirectional calibration
1. Press B to enter the Digital Compass Mode. 2. Hold down A for about one second until the upper display area changes to show ---1---, which indicates the setting screen. � At this time, the magnetic north pointer flashes at the 12 o�clock position to indicate that the watch is ready to calibrate the first direction. 3. Place the watch on a level surface facing any direction you want, and press B to calibrate the first direction. � When the calibration procedure is complete, the message OK appears in the upper display area. This soon changes to ---2--- and the magnetic north pointer flashes at the 6 o�clock position to indicate that the watch is ready for the second direction. 4. Rotate the watch 180 degrees. 5. Press B again to calibrate the second direction. � The message OK appears and the watch automatically returns to the Digital Compass Mode screen.

Calibrating the Barometric Pressure Sensor
The pressure sensor of this watch is calibrated at the factory before shipment and further adjustment is normally not required. If you notice serious errors in the barometric pressure readings produced by the watch, you can calibrate the sensor to correct the errors. Important! Incorrectly calibrating the barometric pressure sensor can result in incorrect readings. Before performing the calibration procedure, compare the readings produced by the watch with those of another reliable and accurate barometer.

To calibrate the pressure sensor
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1. While in the Digital Compass Mode, hold down A for about one second until the upper display area changes to show ---1---, which indicates the setting screen. 2. Press D to start the northerly calibration procedure. � At this time, the indicator (direction N) appears in the upper display area. 3. Place the watch on a level surface, and position it so that its 12 o�clock position points north (as measured with another compass). 4. Press B to start the calibration operation. � The message OK appears and the watch automatically returns to the Digital Compass Mode screen.

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To perform northerly calibration

To change the Altitude Units
1. Press E to enter the Altimeter Mode. 2. Hold down A until the display clears. After four or five seconds, either OFF or the current reference altitude (if set) starts to flash, which indicates the setting screen. 3. Press D three times to move the flashing to the altitude unit setting. 4. Use E to select the unit you want (m or ft). 5. Press A to return to the Altimeter Mode screen. � Changing the altitude units automatically turns the altitude alarm off. � Changing the altitude units automatically restarts the altitude graph. � Performing the above procedure causes altitude values stored in memory also to be converted to the unit you select.

Changing the Barometric Pressure and Temperature Units
Changing the barometric pressure units automatically restarts the barometric pressure graph.

To change the Barometric Pressure and Temperature Units
1. Press C to enter the Barometer/ Thermometer Mode. 2. Hold down A until either OFF or a temperature value (if set) starts to flash, which indicates the setting screen. 3. Press D to move the flashing in the sequence shown below.

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Temperature Sensor Calibration

Pressure Sensor Calibration

°C / °F

hPa[mb]/inHg

4. Press D to move the flashing to the unit setting you want to change (°C/°F or hPa[mb]/inHg). 5. Use E to select the unit you want. 6. Press A to return to the Barometer/Thermometer Mode screen.

Calibrating the Temperature Sensor
The temperature sensor of this watch is calibrated at the factory before shipment and further adjustment is normally not required. If you notice serious errors in the temperature readings produced by the watch, you can calibrate the sensor to correct the errors. Important! Incorrectly calibrating the temperature sensor can result in incorrect readings. Carefully read the following before doing anything. � Compare the readings produced by the watch with those of another reliable and accurate thermometer. � If adjustment is required, remove the watch from your wrist and wait for 20 or 30 minutes to give the temperature of the watch time to stabilize.

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1. Press C to enter the Barometer/ Thermometer Mode. 2. Hold down A until either OFF or a temperature value (if set) starts to flash, which indicates the setting screen. 3. Press D to move the flashing to the pressure sensor calibration setting. � At this time, OFF or the barometric pressure value should be flashing on the display. 4. Press E (+) or B (�) to change the displayed barometric pressure by 1 hPa/mb (0.05 inHg). � Pressing B and E at the same time returns to the factory calibration (OFF). 5. Press A to return to the Barometer/ Thermometer Mode screen.

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