CASIO PRG40B-2
Owner's Manual

2271-4
To set a reference altitude
Auto Measurement Records � Performing an Auto measurement produces a set of records of all the measurements taken during the Auto measurement session. Since Auto measurement produces four altitude readings per hour (at 00, 15, 30, and 45 minutes of each hour) leaving Auto measurement turned on for two hours would result in a set of eight records. � The following shows how the records that make up an Auto measurement set appear when you recall them.
AUTO indicator Altitude graph

1. In the Altimeter Mode, hold down A until the display clears. After four or five seconds, either OFF or the current reference altitude value (if set) will start to flash, which indicates the setting screen. � OFF indicates no reference altitude. 2. Press E to increase the current reference altitude value by 5 meters (or 20 feet) or B to decrease it.

� You can set the reference altitude within the range of �10,000 to 10,000 meters (�32,800 to 32,800 feet). � Pressing E and B at the same returns to OFF, so the watch performs air pressure to altitude conversions based on preset data only. 3. Press A to exit the setting screen.

First record of the set

All records between the initial screen and final screen

Final record of the set

About the Altitude Alarm
The altitude alarm sounds for about five seconds whenever the current altitude matches a preset value. You can press any button to stop the alarm after it starts to sound. Example If you set the altitude alarm at 130 meters, it sounds when you pass the 130meter mark on your way up and on your way back down.

� The altitude graph separates the maximum and minimum altitude readings by nine display dots. Other readings are shown relative to the maximum and minimum. � Note that Auto measurement records are always treated as a set. This means that deleting one record in a set deletes the entire set. Manual Measurement Records � Performing a Manual measurement produces a single record. The illustration below shows how a Manual measurement record appears when you recall it.

1. In the Altimeter Mode, hold down A until the display clears. After four or five seconds, either OFF or the current reference altitude value (if set) will start to flash, which indicates the setting screen. 2. Press D once to move the flashing to the altitude alarm setting. � Press D to move the flashing in the sequence shown below.
Reference Altitude Altitude Alarm Memory Measurement Altitude Unit

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To set the altitude alarm

MIN and MAX Records � The MIN record shows the lowest altitude reading from among those

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3. While the altitude alarm setting is flashing, press E to increase the current altitude alarm value by 5 meters (or 20 feet) or B to decrease it. � You can set the altitude alarm value within the range of �10,000 to 10,000 meters (�32,800 to 32,800 feet). � Pressing E and B at the same resets the altitude alarm value to O. 4. Press A to exit the setting screen.

contained in memory (both Auto and Manual), and the reading displayed in Altimeter Mode. The MAX record shows the highest altitude reading.

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To turn the altitude alarm on and off
Altitude alarm on indicator

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MANUAL indicator

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1. In the Altimeter Mode, hold down A until the display clears. After four or five seconds, either OFF or the current reference altitude value (if set) will start to flash, which indicates the setting screen. 2. Press D once to move the flashing to the altitude alarm setting. 3. Press C to switch the altitude alarm on (ON) and off (OFF).

Highest Altitude Attained

Lowest Altitude Attained

� When you display the MAX screen, the message MAX alternates every second with the date in the upper display. The message MIN alternates on the MIN screen. � The MIN and MAX records are changed automatically whenever a measurement produces a reading that is greater than the current MAX value or less than the current MIN value.

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Current On/Off status

4. Press A to exit the setting screen. � If the altitude alarm is on, the altitude alarm on indicator remains on the display when you change to another mode.

Note � 50 records are enough to store 12 hours and 15 minutes of Auto measurement data (if you do not take any Manual readings during that time). Important! � Further Auto or Manual measurements become impossible whenever memory is full. The message FULL on the display indicates that memory is full. Always check the amount of memory remaining before starting memory measurements, and delete records if necessary.

Memory Data Management
Each altitude record includes an altitude reading, plus the month, day, hour, and minutes the measurement was taken. Records are displayed in the order they were saved. Memory can hold up 50 records. You can store 50 Auto measurement records, 50 Manual measurement records, or any mixed combination of Auto and Manual measurement records. In addition, there are two extra records that show the highest (max) and lowest (min) altitude values, from among the displayed data (Altimeter Mode measurements) and memory data (Memory measurements). The following example illustrates how data would be arranged in memory after you perform one Auto measurement (Auto 1), two Manual measurements (Manual 1, Manual 2), and then one Auto measurement (Auto 2).
Auto 1 Manual 1 Manual 2 Auto 2 MAX MIN

Recalling Altitude Measurement Records
Use the Recall Mode to recall altitude measurement records. You can enter the Recall Mode by pressing the D button. � Measurement records are stored in memory even if an error occurs during the measurement. For details on errors, see �Warning Indicators�.

To recall altitude measurement records
In the Recall Mode, press E to scroll forward
Date

� Note that the highest (MAX) and lowest (MIN) records always are last.

through the stored records or B to scroll backward. � See �Memory Data Management� for information about how data is stored.

Time

Altitude

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