To Specify The Altitude Differential Measurement Range; To Use The Altitude Differential Value; To Save A Reading Manually - Casio 5480 Operation Manual

Advanced Altimeter Mode Operations
Use the information in this section to obtain more accurate altimeter readings, especially while mountain
climbing or trekking.
Using an Altitude Differential Value
If you specify a reference altitude, the small hand of the watch will
indicate the difference between the current altitude and the reference
altitude. The displayed altitude differential value is updated each time the
watch obtains a new altitude reading value.
• Depending on the currently selected display range, the allowable
range for the altitude differential value is 100 meters to –100 meters
(100 meters = 328 feet), or 1,000 meters to –1,000 meters (1,000
meters = 3,280 feet).
• If a reading value is outside the allowable range, the small hand will
point to either OVER or UNDER.
• The small hand will move to 12 o'clock if a sensor reading could not be
Altitude differential taken for some reason or if the reading is outside the allowable range.
• See "Using the Altitude Differential Value While Mountain Climbing or
Hiking" (page E-65) for some real-life examples of how to use this feature.
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To use the altitude differential value

1. Using the contour lines on a map, determine the altitude difference between your current location and
your destination.
2. Take a reading of the altitude at your current location.
3. In the Altimeter Mode, hold down D for at least two seconds to specify your current location as the
altitude differential start point. Release D after DIFF RESET and then RESET appear on the display.
• The watch will take an altitude reading, and the small hand will indicate the altitude differential. ±0
(±0 meters) will be displayed as the altitude differential at the reference point.
4. While comparing the altitude differential you calculated using your map
Current altitude
with the altitude differential indicated by the watch's small hand,
advance towards your destination.
• If the map indicates a differential of +80 meters, you can conclude
that you are near your destination when the small hand indicates
an altitude differential of +80 meters.
Altitude differential (Reference
location, so ±0 m is indicated.)
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Types of Altitude Data
Your watch can record two types of altitude data in its memory: manually saved data and auto save
values.
• Use the Data Recall Mode to view data stored in memory. See "Viewing Altitude Records" (page E-87) for
details.
Manually Saved Records
Any time you perform the procedure below in the Altimeter Mode, the watch will create and store a record
with the currently displayed altitude reading, along with the date and time the reading was taken. There is
enough memory to store up to 30 manually saved records, which are numbered from -01- through -30-.

To save a reading manually

1. In the Altimeter Mode, check to make sure that an altitude reading is
on the display.
If an altitude reading is not displayed, press A to take one. See "To
•
take altitude readings" (page E-61) for details.
2. Hold down A until REC fl ashes and then stops fl ashing.
• This will save the currently displayed altitude reading in a manually
saved record, along with the time and date of the reading.
• The watch will return to the Altimeter Mode screen automatically
after the save operation is complete.
• There is enough memory to store up to 30 manually saved records.
If there are already 30 manually saved records in memory, the
above operation will cause the oldest record to be deleted
automatically to make room for the new one.
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How Cumulative Ascent and Cumulative Descent Values Are Updated
Session start point
20 m
The total ascent and total descent values produced by an Altimeter Mode reading operation session
during the example climb illustrated above are calculated as shown below.
Total Ascent: q (300 m) + e (620 m) = 920 m
Total Descent: w (320 m) + r (500 m) = 820 m
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Operation Guide 5480
620 m
Session end point
320 m
120 m
0 m
Specifying the Altitude Differential Measurement Range
You can use the procedure below to select either ±100 meters or ±1,000
Altitude differential
meters as the altitude differential measurement range.
Relative Altitude Measurement Range
±100 meters (±328 feet)
±1000 meters (±3280 feet)

To specify the altitude differential measurement range

1. In the Altimeter Mode, pull out the crown.
• This will cause the current altitude reading value to appear.
2. Press B twice.
• This will cause DIFF to appear on the digital display, along with the
fl ashing current altitude differential measurement range setting.
3. Rotate the crown to select either 100 meters (100m) or 1,000 meters
(1000m) as the altitude differential measurement range.
4. After the setting is the way you want, push the crown back in to exit the
setting screen.
Using the Altitude Differential Value While Mountain Climbing or Hiking
After you specify the altitude differential start point while mountain climbing or hiking, you can easily
measure the change in the altitude between that point and other points along the way.
The altitude differential with the reference location is indicated by the small hand (altitude differential
indicator) as shown in the illustration below.
Unit: Meters
1000m
100m
Indication range:
0
±100 (1000) meters
−100m
−1000m
Auto Save Values
Auto save values are one type of data stored in the memory of your watch.
• These values are checked and updated automatically by the watch as altitude auto measurements are
taken.
• Auto save is performed only while the watch is in the Altimeter Mode.
• Cumulative ascent and cumulative descent values are updated whenever there is a difference of at
least ±15 meters (±49 feet) from one reading to the next.
How High and Low Altitude Values are Updated
With each auto save reading, the watch compares the current reading against the MAX (high altitude) and
MIN (low altitude) values. It will replace the MAX value if the current reading is greater than MAX, or the
MIN value if the current reading is less than MIN.
• Entering the Altimeter Mode starts a new altitude auto reading session, but it does not reset the current
ASC and DSC values or change them in any way. This means that the starting ASC and DSC values for
a new Altimeter Mode auto reading session are the values that currently are in memory. Each time you
complete an altitude auto reading session by exiting the Altimeter Mode, the total ascent value of the
current session (920 meters in the above example) is added to the session's starting ASC value. Also,
the total descent value of the current auto reading session (–820 meters in the above example) is
added to the session's starting DSC value.
Note
• The high altitude, low altitude, total ascent, and total descent values are retained in memory when you
exit the Altimeter Mode. To clear values, perform the procedure under "To delete a specifi c record"
(page E-90).
Display Unit
10 meters (32 feet)
100 meters (328 feet)
0
Example: Altitude differential
of −30 (300) meters
Unit: 10m
Unit: 100m
Auto Save Values
High Altitude (MAX)
Low Altitude (MIN)
Total Ascent (ASC)
Total Descent (DSC)
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