Digi DT630 User manual

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Altimeter and Compass Watch
Instruction Manual
Overview
Figure 1 LCD display description
Features
• Hour, minute, second, year,
month, day, day of week • Auto calendar • 12/24 hour format display
• Daily alarm • Dual time • Stopwatch
• Countdown timer • Altimeter – Barometer Use • Difference measurement of
Altimeter and Barometer
• 24 hour memory in
Altimeter • 4 day memory in Barometer • Logbook and logbook history
• Current absolute
atmospheric • Sea level pressure • Temperature display
• Compass • Electro – luminescent back
lighted LCD • Low battery indicator
• Diagnostics (System Reset)
Care and Maintenance
• Protect your watch from shocks, extreme heat and directly exposure to sunlight.
• Don’t try to remove the housing or button of the watch.
• Don’t insert any object into the watch.
• Always put the watch in a clear, dry and room temperature environment when the watch is not used.
• Follow the procedure discussed in the manual only.
• Make sure the area around the sensors is free of dust or strong chemical.

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Quick Reference Guide
Figure 2 Quick Reference Guide

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Time
Time Main Mode Path Press (S1) until the mode indicator points to the “TIME”
Field 1 Day of week, barometer trend indicator
Field 2 Hour, Minute, Second
Field 3 Month, day
Outer Circumference Second animation
Adjust
o Hold (S2) for 1 second, the second digit will begin to flash
o Press (S2) to select secondminutehour12/24houryearmonthday
o Press (S3) or (S4) to set the function
o Press (S1) to accept the setting
Daily Alarm Path Press (S2) ×1 from Time Main Mode
Field 1 “ON” or “OFF”
Field 2 Time of a particular alarm
Field 3 Current time
Adjust
o Press (S3) or (S4) to select the alarm number
o Hold (S2) for 1 second, the “ON” or “OFF” will begin to flash
o Press (S2) to select “ON” or “OFF”hour minute
o Press (S3) or (S4) to set the function
o Press (S1) to accept the setting
Note
 “” will be displayed when any alarm is enabled.
 The alarm will beep for 30 seconds when the timer reaches. Press any button to disable beeping.
 Two “beep” will sound when the alarm is enabled. One “beep” will sound when any alarm is disabled.
Stopwatch Path Press (S2) ×2 from Time Main Mode
Field 1 Hour and stopwatch icon
Field 2 Minutes, second and 1/100 second
Field 3 Current time
Setup
o Press (S4) to start
o Press (S3) to split
o Press (S4) to stop
o Press (S3) to reset the stopwatch
Note
 “” will begin to flash when user leave the mode while it is functioning.
Countdown Timer Path Press (S2) ×3 from Time Main Mode
Field 1 Hour and “TIMER”
Field 2 Minutes, second and 1/100 second
Field 3 Current time

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Adjust
o Hold (S2) for 1 second, second will begin to flash
o Press (S2) to select secondminutehour
o Press (S3) or (S4) to set
o Press (S1) to accept the setting
o Press (S4) to start stop
o Press (S3) to reset
Notes
 The timer will beep for 30 seconds when the timer reaches zero. Press any button to disable beeping.
 “TIMER” will begin to flash when user leave the mode while it is functioning
Dual Time Path Press (S2) ×4 from Time Main Mode
Field 1 “dUA”
Field 2 Current time
Field 3 Dual time
Adjust
o Hold (S2) for 1 second, the hour digit will begin to flash
o Press (S2) to select hour minute
o Press (S3) or (S4) to set the function
o Press (S1) to accept the setting
Altimeter
Altimeter Main ModePath Press (S1) until the mode indicator points to “ALTI”
Field 1 Vertical ascent and decent rate, barometer trend indicator
Field 2 Current altitude
Field 3 Current time
Outer Circumference Altitude Animation. A complete circle represents 1000 meter or
1000ft
Notes
 The watch will be back to Time Main Mode after 12 hours.
Altimeter – Barometer Use Selection
• When Altimeter Use is selected, all pressure changes are interpreted as altitude change.
• When Barometer Use is selected, all pressure changes are interpreted as weather change.
Path Press (S2)×1 from Altitude Main Mode
Field 1 Display the “REF”
Field 2 Current altitude
Field 3 “USE”
Outer Circumference Altitude animation. A complete circle represents 1000 meter or
1000ft
Setup
o Altimeter – Barometer Use Selection
Press (S3) or (S4) to switch the direction of arrow (“Altimeter Use” or “Barometer Use”)
Press (S1) to accept the setting

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o Reference Altitude Adjustment
Hold (S2) for 1 secondCurrent altitude on field 2 will begin to flash. Press (S3) or (S4) to set the
function Press (S1) to accept the setting
Note
 Setting of the reference altitude of a current location will also change the sea level pressure. If the user is
at a known altitude, adjustment of the reference altitude to this correct altitude will give the present sea
level atmospheric pressure.
Altimeter Difference Measurement
• Enable user to measure the absolute altitude difference between the start and stop time.
Path Press (S2)×2 from Altitude Main Mode
Field 1 Vertical ascent or decent rate and “DIFF”
Field 2 Current altitude
Field 3 Running time
Outer Circumference Altitude animation. A complete circle represents 1000 meter or
1000ft
Setup
o Hold (S2) for 1 second, “SET” will display on Field 1 and a zero value will begin to flash on Field 2
o Press (S3) or (S4) to select a non-flashing altitude (the previous altitude difference record) to resume the
previous difference measurement. User selects the flashing zero will start a new difference measurement.
For a new difference measurement, the time will start running automatically.
o Press (S1) to accept the setting
Stop or Resume Difference Measurement
o In the Altimeter Difference Measurement mode Press to stop or resume the measurement
Notes
 Altimeter different measurement cannot start when Barometer Use is selected.
 “ : ” in field 3 will begin to flash to indicate the difference measurement mode is in operation.
 “DIFF” will begin to flash when user leave the mode while it is functioning
 The watch will return to Time Main Mode after 12 hours.
 Running time displays up to 99 hours and 59 minutes. Afterwards, (--:--) appears in Field 3.
24 hour Memory
• This is the altitude record for the last 24 hours
Path Press (S2)×3 from Altitude Main Mode
Field 1 Vertical ascent or decent rate and “MEM”
Field 2 Current altitude
Field 3 Flashing hour
Outer Circumference Altitude animation. A complete circle represents 1000 meter or
1000ft
o Viewing Information
Press (S3) or (S4) to scroll forward and backward to view the corresponding altitude, ascent and
decent rate of the particular hour
Notes
 Either select Altimeter Use or Barometer Use to record the on-the-hour information for the last 24-hours.
 The watch will return to Time Main Mode after 10 minutes.
Logbook
• It records the average vertical ascent and descent rate, total vertical distance travelled, elapsed time, date,
lap number and log number.
• The logbook has five displays. The display automatically displays the first frame for 7 seconds, and the
rest for 4-seconds.
o View Logbook
Press (S2)×4 from Altitude Main Mode
Press (S3) or (S4) to scroll the records

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o Operation of Logbook
Start logbook by quickly pressing (S4) ×2 in the Altimeter Main Mode “LOG” will begin to flash,
a new logbook will start immediately
Stop the current logbook by quickly pressing (S4) ×2 in the Altimeter Main Mode“LOG” will
disappear
Display 1 Current log information
Field 1 Year and “LOG”
Field 2 “LO” with current logbook number flashing
Field 3 Month and day of the particular logbook number
Display 2 Ascent information for the current logbook
Field 1 Average ascent rate during the event and “LOG”
Field 2 Total vertical ascent
Field 3 “ASC”
Display 3 Descent information for the current logbook
Field 1 Average descent rate during the event and “LOG”
Field 2 Total vertical descent
Field 3 “dSC”
Note
 The maximum ascent and descent that can be shown in one logbook is 9999999 m/ft.
Display 4 Number of laps
Field 1 “LOG”
Field 2 Total number of ascent and descent
Field 3 “LAP”
Note
 A lap is a vertical movement including firstly ascent, and then descent equal to 50m (150 ft) or more.
Display 5 Time duration of recording information
Field 1 “LOG”
Field 2 Total time of log
Field 3 “dUr”
Notes
 The memory capacity is 99 logs, maximum 20 hours duration for each. After the log number 99 is being
used, the following logbook will replace the memory of the first record.
 “LOG” will begin to flash when user leave the mode while it is functioning.
 The watch will return to Time Main Mode after 10 minutes
 Logbook will not function when Barometer Use is selected.
Clearing logbook
o Press (S2) ×4 from Altimeter Main Mode. Hold (S2) for 1 second, “CLR” and “LOG” will display on
Field 1 and “LOG-XX” will display on Field 2. “NO” will flash on Field 3
o Press (S2) to select the current logbook or entire logbook
o Press (S3) or (S4) to select “YES” or “NO”
o Press (S1) to accept the setting

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Logbook History
• The logbook history shows a summation of all logs recorded, such as total vertical distance, highest
altitude, the best ascent and decent rate, date.
Setup
o Press (S2)×5 from the Altimeter Main Mode
There are totally four displays, they are:
Display 1 Current logbook history
Field 1 Year of the last cleared logbook history and “LOG”
Field 2 “HIS”
Field 3 Month and day of the last cleared logbook
o Press (S3) or (S4) to scroll the records
Display 2 The highest Record
Field 1 Flashing “HI” and “LOG”
Field 2 Highest altitude recorded since the last date cleared
Field 3 Year and date interchange for 4 secs
Display 3 Accumulative ascent Record
Field 1 Flashing “ASC” and “LOG”
Field 2 Total accumulative vertical ascent since the last reset
Field 3 Blank
Display 4 Accumulative descent record
Field 1 Flashing “dSC” and “LOG”
Field 2 Total accumulative vertical descent since the last reset
Field 3 Blank
o Press (S1) or (S2) to exit this activity and back to Altimeter Main Mode
Notes
 The watch will return to main mode after 10 minutes
 Logbook history records remain unchanged when Barometer Use is selected
Clearing the logbook history
o Hold (S2) for 1 second, “CLR” and “LOG” will display on Field 1 “HIS” will display on Field 2 
“NO” will begin to flash on Field 3
o Press (S3) or (S4) select “YES “ or “NO”
o Press (S1) button to accept the setting
Remarks
• Measurement on the rate of vertical movement and vertical altitude in 1-second intervals for first 2
seconds. A flashing zero will be shown in the first 2 seconds.
• Weighted Current Rate is used to determine the frequency of measurement of altimeter. Micro processor
in the watch uses the most recent 3 current rates, which are the ascent rate or descent rate taken by the
altimeter sensor, to calculate the measurement frequency. 1 measurement per 1, 2, 5 or 10 secs is used
depending on the results of the calculation.

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Barometer
Barometer Main Mode
Path Press (S1) until the mode indicator is directly below “BARO”
Field 1 Current temperature, barometer trend indicator
Field 2 Sea level pressure
Field 3 Current time or current absolute atmospheric pressure
Outer Circumference Pressure animation. One complete circle shows the atmospheric
pressure over 100 mbar or 1 inHg
o Press (S4) to select current time or current absolute atmosphere pressure on field 3
Notes
 The absolute atmospheric pressure is the actual pressure in any location at any given time.
 When Altimeter Use is selected, only the current atmosphere pressure reading will change.
Barometer Trend Indicator
• Barometric trend is comprised of two lines forming an arrow. The left line represents the trend from –6 to
-3 hours and the right arrow represents the trend from –3 to the present time. They can indicate 9 different
patterns in the barometric trend. Situation last 3 hours
Drop heavily Remaining stable Rise heavily
Drop heavily
Remaining stable
Situation 3-6 hours ago
Rise heavily
Notes
 Rise or drop heavily means drop or raise more than 2 mbar within 3 hours.
 When the Altimeter Use is selected, the trend indicator is not shown, except the 4-day memory mode.
Altimeter – Barometer Use Selection
• Select the Altimeter Use or Barometer Use.
• Adjust the sea level pressure.
Path Press (S2)×1 from the Barometer Main Mode
Field 1 “SEA”
Field 2 Sea level pressure
Field 3 “USE”
Outer Circumference Pressure animation. One complete circle shows the atmospheric
pressure over 100 mbar or 1 inHg
Setup
o Altimeter – Barometer Use Selection
Press (S3) or (S4) to switch the direction of arrow (“Altimeter Use” or “Barometer Use”)
Press (S1) to accept the setting
o Sea Level Pressure adjust
Hold (S2) for 1 secondSea level pressure on field 2 will begin to flash. Press (S3) or (S4) to set
the sea level pressure. Press (S1) to accept the setting
Notes
 Information on the current sea level pressure can be obtained through newspaper, local news and radio
weather reports, local airport or the Internet.

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 When Altimeter is selected, Barometer Difference Measurement cannot be started.
Pressure Difference Measurement
• It measures the absolute difference in barometric pressure within a start and stop time.
Path Press (S2)×2 from the Barometer Main Mode
Field 1 Change in temperature, barometer trend indicator, “DIFF”
Field 2 Change in sea level pressure
Field 3 Duration time
Outer Circumference Pressure animation. One complete circle shows the atmospheric
pressure over 100 mbar or 1 inHg
Setup
o Hold (S2) for 1 second, “SET” will display on Field 1 and a zero value will begin to flash on Field 2
o Press (S3) or (S4) to select a non-flashing pressure difference (the previous pressure difference record) to
resume the previous difference measurement or select the flashing zero to start a new difference
measurement. For a new difference measurement the time will start running automatically.
o Press (S1) to accept the setting
o Press (S4) to stop or resume the measurement
Notes
 Every time this mode is entered, the reading will start with flashing zero.
 “DIFF” will begin to flash when user leave the mode while it is functioning
 When Altimeter Use is selected, all information will not change in this mode.
 The watch will return to Time Main Mode after 12 hours.
4 day Memory Mode
• The changes in pressure in the last 4-days help the user to forecast the weather condition.
Path Press (S2)×3 from the Barometer Main Mode
Field 1 Day of week, barometric trend indicator and “MEM”
Field 2 Sea level pressure
Field 3 Particular flashing hour
Outer Circumference Pressure animation. One complete circle shows the atmospheric
pressure over 100 mbar or 1 inHg
o Press (S3) or (S4) to view records
Notes
 The latest 6 records are taken in 1-hour intervals. Other records are taken in 6-hour intervals
 Barometer trend indicator only appears in this mode when Altimeter Use is selected.
 The watch will return to main mode after 10 minute.
Calibration of Absolute Pressure
• User can calibrate the absolute atmosphere pressure.
Adjust
o In the Barometer Main Mode, hold (S2) for 1 second, the absolute atmosphere pressure value will begin to
flash on field 2
o Press (S3) or (S4) to set,
o Press (S1) to accept the setting
Important notes
• The absolute pressure is calibrated by factory, it is not recommended for the user to set the value in daily
use.

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• When there is a physical characteristic shift of sensor due to aging, or when the watch has been left
unused for more than one year, calibrating the absolute pressure is recommended.
• To find out an accurate pressure value, use a professional barometer to calibrate the absolute pressure.
• User can also adjust the watch at seaside after getting an accurate sea level value from local weather
observatory.
Remarks
• Pressure and temperature changes are measured in intervals of 10 seconds.
• Barometric values are measured at 1-hour intervals to estimate the barometric trend.
• Temperature range: -10 C°to 60 C°(14 F°to 140 F°). “LL” will be displayed when the temperature is
lower than -10 C°and “HH” will be displayed when the temperature is higher than 60 C°.
Compass
Compass Mode
• Direction showing in the current location
Path Press (S1) until the mode indicator is directly below “COMP”
Field 1 Cardinal point abbreviation
Field 2 Bearing in degree
Field 3 Current time
Outer Circumference Graphically displays the North and South Arrows, where 1 –
segment lit is the North
Use of Compass
o Compass displays actively for 30 second goes into sleep mode and “- --o” will show on field 2 Press
either (S3) or (S4) to reactive the compass
Notes
 Calibration of compass is required for the first time or after battery replacement.
Calibration of Compass
• Compass should be calibrated when it is subjected to close proximity of magnetic sources, extreme cold
weather, every time the battery is replaced or suspected that any environmental conditions have affected
the compass reading.
Adjust
o Hold (S2) for 1 second, “CMP” will be displayed on field 1, “PUSH-” will begin to flash on field 2 and
“CAL” will display on field 3.
o Press (S3) to start the calibration “ °360 ” will be displayed on field 2 and the outer circumference
displays all segment lit
o Hold the watch on observer level and slowly rotate it in either clockwise or anti – clockwise direction, for
1 complete turn. “DONE” will be displayed on field 2 when all segments disappear Press (S1) to
accept the setting
Note
 The watch will return to Time Main Mode after 30 minutes.