C OOL G EAR

The XT511 Base Camp Radio
The XT511 Base Camp Radio combines the emergency power of a dynamo crank with GMRS 2-way radio technology. The XT511 also includes AM/FM radio, All Hazards Weather Alert radio, and a clock with alarm. Users can communicate with other FRS/GMRS radios. The All Hazards Weather Alert feature provides potentially life saving functionality of the alert override. The XT511 will automatically respond to emergency alert broadcast by the National Weather Service. External jacks include headset/microphone jack and USB jack to charge electronic devices such as cell phones (USB cable not included). Package includes: radio, AC adapter, DC adapter, accessory MIC, and rechargeable battery. Suggested retail price: $75.88.

www.exlint.com

Suunto Vector Wristop Navigator Watch
The Suunto provides you with the means to make rational decisions in situations where valuable information on your surroundings is essential for your safety. Equipped with an altimeter, barometer, electronic compass, and sports watch features, Suunto Vector will safely guide and inform you - in even the most extreme conditions. Features include: Compass: bearing, tracking, declination adjustment, calibration, cardinal and half-cardinal abbreviation, and rotating bezel Altimeter: difference measurements, 24-hour memory, logbook, logbook history, current altitude, and vertical ascent/descent rate Barometer: difference measurements, 4-day memory, trend indicator, atmospheric and sea level pressures, and temperature Watch: calender date (programmed through 2089), daily alarm, stopwatch, and countdown timer Electro-luminescent backlight Water-resistant to 30m (100 ft) Includes bubble level for +/- 2-3 compass accuracy Suggested retail price: $220.99.

www.uscav.com/ameriforce

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1.3.2 The [+] Button

Is located on the bottom right of the Wristop Computer. In the setup process, pressing the [+] button changes or scrolls the value upward. In the timing and recording functions, this button acts as a start/stop (On/Off) button. In the memory and logbook functions, this button advances through previous recorded screens.

1.3.3 The [-] Button

Is located on the bottom left of the Wristop Computer. In the setup process, pressing the [-] button changes or scrolls the value downward. Also known as the Fast Cumulative button, by pressing the [-] button in any of the main modes, except the compass mode, the Wristop Computer will quickly access information about total vertical ascent/descent, number of runs completed as well as maximum, minimum and average heart rate of the current or last completed recording. In the compass mode, the [-] button locks the current bearing for 10 seconds. In the timing functions, this button acts as a reset or pause button. In the memory and logbook functions, this button backtracks through previously recorded screens.
1.3.4 The [Select] Button
Is located on the top left of the Wristop Computer. In the main mode level, pressing the [Select] button allows the user to enter into the sub modes of the particular function or return to the main mode the user is in. In the main mode or sub mode, pressing and holding the [Select] button for more than 2 seconds allows the user to enter the setup process. In the setup process, the [Select] button allows the user to move between settable units or values and determine preferences.

1.4 LCD Display

The display is designed to offer maximum clarity and simplicity and is divided into six distinct viewable areas. The Outer Circumference encompasses the outer boundary of the LCD display. A Barometric Trend Indicator provides a quick reference for analyzing and collating possible conditions in the weather. Field 1 displays values in either numbers or text depending on the mode or sub mode the user is in. Field 2 displays large numbers and/or related unit of measure within the function. The Mode Indicator bar displays the five main modes (functions) of the Wristop Computer (a triangle arrow is just below indicating the mode). The fifth main mode, HR is displayed on the Outer circumference on the bottom right. When the one segment under HR is lit, the mode is activated for viewing and selection purposes. Field 3 displays either numbers and/or text.

6. place the new cell into the battery compartment (negative side down, positive side up); 7. ensure that the O-ring is in place to keep the Wristop Computer waterproof and place the battery compartment cover back onto the backside of the Wristop Computer; 8. insert a coin back into the coin slot; and 9. turn the coin clockwise to the close position marked on the back of the case. Note: Battery replacement should be performed with extreme care so as to ensure the Wristop Computer continues to remain waterproof. It is the operators responsibility to take due care to ensure that the Wristop Computer remains waterproof. Note: After every battery replacement, it is necessary to calibrate the magnetic sensor. Details on performing this process are found in Calibrating the Compass section of this guide.
1.8 Battery Replacement of the Suunto Transmitter Belt
The transmitter belt operates on a 3-Volt lithium cell, type: CR 2032. The average expected battery life of the transmitter belt is 200 hours of use in ideal operating temperatures. Replace the battery as illustrated here:
Note: Suunto recommends that the battery cover and the O ring are changed simultaneously with the battery to ensure that the transmitter remains clean and water resistant. Replacement covers are available with replacement batteries.
CHAPTER 2 Heart Rate Monitor 2.1 SUUNTO Wristop Computer AND TRANSMITTER IN A WATER ENVIRONMENT
Heart rate measurement in a water environment is technically demanding for the following reasons: Pool water with a high chlorine content and seawater may be very conductive and the electrodes of the transmitter may get short circuited and ECG (ECG = electrocardiogram) signals cannot be detected by the transmitter unit. Jumping into the water or strenuous muscle movement during competitive swimming may cause water resistance that shifts the transmitter on the body to a location where it is not possible to pick up the ECG signal. The ECG signal strength varies depending on the individuals tissue composition and the percentage of people who have problems with heart rate measurement is considerably higher in a water environment than in other use. Note: The Wristop Computer is not a dive instrument, and therefore buttons should not be operated (put to use) while under water.
Suunto Wristop Computer is water proof to a depth of 30m/100ft. To maintain the water resistance, it is strongly recommended to have all service done by authorised Suunto service personnel.

2.5 Operation

The Heart Rate Monitor function provides the user with: a heart rate range from beats/min; a stopwatch range of up to 23:59.59, stores up to 30 split times and heart rate readings; an interval countdown timer range of up to 23:59.59; upper and lower limits adjustable in one beat increments to set target heart rate zone; audible alarms alert the user of exceeding upper or lower limit; heart rate displayed in relation to current time or running time (stopwatch and countdown timer); autorepeat of countdown timer for interval training (training interval, recovery interval, number of intervals); and HRM memory activated from the starting of the stopwatch or the countdown timer storing total training time, maximum, minimum and average heart rate during training, as well as time spent in, above and below target heart rate zone. When stopwatch is used, the memory also stores up to 30 split times and heart rates for viewing. To view and use the Heart Rate Monitor function: Check the LCD. If the segment under HR is not highlighted, PRESS the [Mode] button until the segment directly under HR is lit.
In the HRM mode (Fig. 2): Field 1 displays the text HR (HR = heart rate). Field 2 displays the current heart rate. Field 3 displays the current time. Note: In order to activate this feature, the transmitter belt must be worn around the chest area. The middle row will show zero until there is a proper reading to display.
2.5.1 How to Set the Target Zones of the Heart Rate Monitor
To set the upper and lower limits in the HRM mode: 1.PRESS the [Select] button and hold for 2 seconds. Field 2 displays the text OFF. 2.PRESS the [+] button or the [-] button to toggle between off and on. Choose On to activate the audible heart rate limit alarms. 3.PRESS the [Select] button to move to the next setting (setting the upper limit) (Fig. 3). Field 1 displays the text LI (LI = Limits). Field 2 flashes the upper limit where the default value is 240. Field 3 displays the lower limit. 4.PRESS the [+] button to scroll the value upward or PRESS the [-] button to scroll the value downward. 5.At the value desired, PRESS the [Select] button to accept the upper limit value and move to the next setting (setting the lower limit) (Fig. 3). Field 1 displays the text LI (LI = Limits). Field 2 displays the new upper limit setting. Field 3 flashes the lower limit where the default value is 20. 6.PRESS the [+] button to scroll the lower limit value upward or PRESS the [-] button to scroll the value downward. 7.At the value desired, PRESS the [Mode] button to accept the upper and lower limits and exit. The HRM target heart rate zone is set. Field 1 displays the text LI (LI = Limits).

Limits On means that the Wristop Computer will audibly alert the user that a chosen upper or lower limit has been exceeded. Limits OFF means that the Wristop Computer will not alert the user, but the limits will however be used to calculate time spent in, above and below the target heart rate zone. The outer circumference will graphically show the heart rate level reached by the user, in relation to the heart rate limit set. The circumference will adjust to equal any limit settings starting from the 12 oclock position going clockwise. E.g. if the upper limit is set to 140 beats/minute and the lower limit to 130 beats/minute, one full circle on the outer circumference will equal 10 beats/minute.

2.6 Stopwatch SUB Mode

The Wristop Computer stopwatch feature can provide split time measurement up to 23 hours 59 minutes and 59 seconds up to 30 split times and heart rate readings can be stored into the HRM memory. In the HRM mode, PRESS the [Select] button once to enter this submode. In the Stopwatch mode (Fig. 4): Field 1 displays the seconds and tenths of a second, Field 2 displays the current heart rate, and Field 3 displays hours and minutes and to the far right stopwatch. Note: When the transmitter is not worn, Field 2 displays the current time. The HRM memory for one event is automatically activated when starting the stopwatch (or countdown timer). The memory stores total training time, maximum, minimum and average heart rate during training, as well as time spent in, above and below the target heart rate zone for one event. The next time the stopwatch (or countdown timer) is activated, the previous events information will be erased.
2.6.1 How to Use the Stopwatch
There are three timing modes the user can employ: an elapsed time measurement; a split time measurement; and a finish time measurement for up to 30 runners. In the elapsed time mode: 1.PRESS the [+] button to start, stop, and restart the stopwatch in the stopwatch sub mode.
2.PRESS the [-] button to reset the stopwatch to zero once the stopwatch has stopped. In the split time mode: 1.PRESS the [+] button to start the stopwatch. 2.PRESS the [-] button once to stop the stopwatch and to display a split time. This split time and the momentaneous heart rate reading will be stored in the memory for later viewing. The stopwatch will automatically start running after displaying the split time for 5 seconds. Repeat this procedure for each split time. 3.PRESS the [+] button to stop the stopwatch. 4.PRESS the [-] button to reset the stopwatch to zero once the stopwatch has been stopped. In the two finish time mode: 1.PRESS the [+] button to start the stopwatch. 2. PRESS the [-] button once to stop the stopwatch and to display the first finish time. This finnish time will be stored in the memory for later viewing. The stopwatch will automatically start running after displaying the finish time for 5 seconds. Repeat this procedure for each runner. 3.PRESS the [+] button to stop the stopwatch. 4.PRESS the [-] button to reset the stopwatch to zero once the stopwatch has been stopped. Note: If the user is in other modes or submodes when the stopwatch function is activated, the stopwatch will continue and remain in the background. A flashing stopwatch text in Field 3 indicates that the stopwatch is still activated.

10.PRESS the [+] button to scroll the seconds upward or PRESS the [-] button to scroll the seconds downward. 11.At the seconds desired, PRESS the [Select] button to move to the next setting. Located on right of Field 3, the minutes will begin to flash. 12.PRESS the [+] button to scroll the minutes upward or PRESS the [-] button to scroll the minutes downward. 13.At the minutes desired, PRESS the [Select] button to move to the next setting. Located in the center of Field 3, the hour will begin to flash. 14.PRESS the [+] button to scroll the hour upward or PRESS the [-] button to scroll the hour downward. 15.At the hour value desired, PRESS the [Mode] button to accept the changes and exit the setup program. The interval countdown timer setup for Training and Recovery is complete.
2.7.2 How to Start the Countdown Timer
During the training interval, the set heart rate limits are in use and the heart rate information is calculated and stored in the HRM memory. When the time has been counted down, a beep is heard, and simultaneously a new interval will begin. If the recovery interval has a value other than zero, this interval will now be counted down. During the recovery interval the heart rate is displayed, but not measured nor stored for later calculations and will not effect max/min/average heart rate readings nor the time spent in/above/below the target zone readings. The limits established are not in use during this interval either. If the recovery interval has been set to 0, another training interval is immediately started. This interval is repeated as many times as set in the setup of the countdown timer. When the last interval is completed, a triple-beep is heard signifying to the user the end of the countdown timer process. To start the countdown timer: 1.PRESS the [+] button to start, stop, and restart the timer in the countdown timer sub mode. 2. During an activity, PRESS the [-] button to view the number of intervals remaining. This will be displayed in Field 2. 3.Once the timer has stopped, PRESS the [-] button to reset the timer to zero. Note: If the user is in other modes or sub modes when the countdown time has been activated, the countdown timer will continue and remain in the background. A flashing timer text in Field 3 indicates that the timer is still activated.

2.8 HRM Memory

The HRM memory sub mode stores the maximum, minimum, and average heart rates during selected intervals (training or recovery), as well as the time spent in, above and below selected heart rates (target zones). If the heart rate goes beyond the selected zone, an alarm sounds. To view the HRM Memory, in the HRM mode, PRESS the [Select] button three times to enter this submode. In the HRM Memory mode, there are six display screens. 1. In the first display (main display) (Fig. 8): Field 1 displays the year of the start date; Field 2 displays the start time; and
Field 3 displays the start date.
2. In the second display (duration of the event) (Fig. 9): Field 1 displays the seconds of training time; Field 2 displays the hours and minutes of the training time; and Field 3 displays the text dUr (dUr = duration of the event). 3. In the third display (duration of the training intervals) (Fig. 10): Field 1 displays the seconds of training time; Field 2 displays the hours and minutes of the training time; and Field 3 displays the text 1dUr (1dUr = duration of the training intervals). Note: The third display will be shown only when the countdown timer is used. 4. In the fourth display (heart rate information): (Fig. 11) Field 1 displays the maximum heart rate recorded; Field 2 displays the average heart recorded; and

15.At the desired day, PRESS the [Mode] button to accept the changes and return to the main mode. Note: If the user does not press any button for 1 minute in the setup mode, the display will automatically exit setup. Setting the time is now complete.

3.2 Daily Alarm SUB Mode

In the Daily Alarm mode (Fig. 19):
The Daily Alarm sub mode allows the user to select and set up to 3 alarms. The alarm volume cannot be changed. In the TIME mode, PRESS the [Select] button once to enter this sub mode. Field 1 displays ON or OFF (the activation status of a particular alarm), Field 2 displays the time of a particular alarm, and Field 3 displays the alarm (1, 2, or 3) the user is viewing. Pressing the [+] or the [-] button will toggle between the alarms 1, 2, or 3 to view the settings for each alarm.
3.2.1 How to Set the Daily Alarms
1.PRESS the [+] or the [-] button to select the desired alarm to be set (1, 2, or 3). 2. PRESS the [Select] button and hold in for 2 seconds. Located in Field 1, the ON or OFF will begin to flash. 3.PRESS either the [+] or the [-] button to toggle between ON and OFF. 4.At the setting desired, PRESS the [Select] button to move to the next setting. Located in the center of Field 2, the hour will begin to flash. 5.PRESS the [+] button to scroll the hour upward or PRESS the [-] button to scroll the hour downward. 6.At the hour desired, PRESS the [Select] button to move to the next setting. Located on the right of Field 2, the minutes will begin to flash. 7.PRESS the [+] button to scroll the minutes upward or PRESS the [-] button to scroll the minutes downward. 8.At the minutes desired, PRESS the [Mode] button to accept the changes and exit the setup program. A small bell will appear at the bottom left side in Field 2 to signify an alarm has been activated. The Alarm setup is complete. To activate up to three alarms, please repeat steps 1-8 for the selected alarm (1, 2, or 3).

3.3 Dual time SUB Mode

In the dual time mode (Fig. 20): Field 1 displays dUA indicating dual time, Field 2 displays the current time, and Field 3 displays the dual time (e.g. your home time).
The Dual Time sub mode allows you to set the watch to display a time other than the main one. In the TIME mode, PRESS the [Select] button twice to enter this sub mode.

4.4 Logbook SUB Mode

In the Altimeter mode, PRESS the [Select] button three times to enter this sub mode. In the logbook mode, nine summarizing displays are shown. The displays automatically rotate showing the first display for 7 seconds then proceeds to show the next displays at 4 second intervals. In the first display (Fig. 28): Field 1 displays the year; Field 2 displays the text LO with the current logbook number flashing; and Field 3 displays the month and day of the particular logbook number. To the left of the month/day, is the text Log Book. The user can PRESS the [-] to scroll down to view previous logs captured and then PRESS [+] to scroll up to view the most current logbook. The second display shows the ascent information for the particular logbook that is being viewed (Fig. 29).
Field 1 displays the average vertical ascent rate during the event; Field 2 displays the total vertical ascent ; and Field 3 displays the text ASC along with the text Log Book to the left. The third display shows the descent information for the particular logbook that is being viewed (Fig. 30). Field 1 displays the average vertical descent rate during the event; Field 2 displays the total vertical descent; and Field 3 displays the text dSC along with the text Log Book to the left. The fourth display shows the number of laps (runs, ascents and descents) completed for the particular logbook that is being viewed (Fig. 31). Field 2 displays the total number of laps; and Field 3 displays the text LAP along with the text Log Book to the left. Note: A Lap is a vertical movement of ascent and descent equaling 150 ft/50m or more. The fifth display shows the time duration of recording information in the particular logbook that is being viewed (Fig. 32). Field 2 displays the total time of the log ; and Field 3 displays the text dUr along with the text Log Book to the left. The sixth display shows the heart rate information recorded in the particular logbook that is being viewed (Fig. 33). Field 1 displays the maximum heart rate during the event; Field 2 displays the average heart rate; and Field 3 displays the minimum heart rate along with the one segment highlighted under HRM. The seventh display shows the time spent above the target HR zone selected (Fig. 34). Field 1 displays the seconds; Field 2 displays the time spent above the target HR zone; and Field 3 displays the text AbO (AbO=above) along with the one segment highlighted under HRM. The eigth display shows the time spent in the target HR zone selected (Fig. 35). Field 1 displays the seconds;
Field 2 displays the time spent in the target HR zone; and Field 3 displays the text In (In=within target zone) along with the one segment highlighted under HRM. The ninth display shows the time spent below the target HR zone selected (Fig. 36). Field 1 displays the seconds; Field 2 displays the time spent below the target HR zone; and Field 3 displays the text bEL (bEL=below) along with the one segment highlighted under HRM. Note: the maximum, minimum and average heart rate values displayed in the logbook, are calculated based on the chosen recording interval. Please note that these values are more accurate the shorter the recording interval. The values showed in the logbook will vary from the values displayed in the HRM memory, since the sampling rate in the HRM memory is always 2 seconds. Note: If you want greater precision, start new logbooks more often or lower the recording interval.

4.5.1 Clearing the Logbook History
To clear the history of the logbook: 1. In any of the logbook history displays, PRESS the [Select] button and hold in for 2 seconds. Located in Field 1 is the text CLR; in Field 2 the text HIS; and in Field 3, nO will begin to flash (Fig. 44). 2.PRESS the [+] button to toggle between YES and NO. 3.PRESS the [Mode] button to accept the option yes. The logbook history is erased and a new starting date is set to begin new cumulative measurements. Note: If the user does not press any button for 1 minute in the setup mode, the display will automatically exit setup. We recommend that the logbook history be cleared prior to beginning the first logbook recording ever.

CHAPTER 5 Barometer Mode

The Suunto Wristop Computer Barometer function provides the user with: an adjustable unit of measure mbar or inHg; mbar range 300 to 1,100 mbar, inHg range 8.90 to 32.40; an adjustable sea level pressure function ranging from 27.2530.80 inHg / 9211,080 mbar a resolution of 1 mbar or 0.05 inHg; a one hour interval measuring to estimate barometric trend; difference measurement function allows zeroing of the barometer for following e.g. overnight changes in barometric pressure and temperature; an automatic 4-day memory of atmospheric pressure for the last 6 hours in 1-hour intervals, thereafter, in 6-hour intervals; temperature compensation (temperature does not effect the pressure within the specified temperature range) a temperature range from -20 to 60C or -5 to 140F; and a temperature resolution of 1 C or F. Note: Body Heat will effect temperature when the Wristop Computer is worn on the wrist. To achieve an accurate reading remove the Wristop Computer from the wrist and allow at least 15-30 minutes before reading the temperature. To view and use the Barometer function: Check the mode indicator arrow. If the mode arrow is not on BARO, PRESS the [Mode] button until the arrow is directly below BARO. In the Barometer mode (Fig. 45): Field 1 displays the current temperature. Field 2 displays the current absolute atmospheric pressure. Field 3 displays the current time. The Outer Circumference graphically displays the atmospheric pressure over 100 millibars or 1 inHg where one complete circle is equivalent to 100 mbar/1 inHg, depending on the unit of measure chosen. Note: The absolute pressure is the actual pressure in any location at any given time. Whereas, sea level pressure is the corresponding pressure at sea level.

Note: The absolute pressure is depending on current altitude and weather.
5.1 Pressure Difference Measurement SUB Mode
In the Barometer mode, PRESS the [Select] button once to enter this sub mode. In the Pressure Difference Measurement sub mode (Fig. 46): Field 1 displays the change in temperature. Field 2 displays the change in atmospheric pressure. Field 3 displays the current time, to the left of the time is the text differ. The Outer Circumference graphically displays the change in pressure where one full circle equals 100 mbars or 1 inHg.
The pressure difference is not referring to the sea level pressure, but to the current barometric pressure measured by the watch.
This mode does continue in the background and allows the user to move to other modes and at the users convenience return to this sub mode to view the current reading.
5.1.1 How to Start the Pressure Difference Measurement
1. PRESS the [Select] button and hold in for 2 seconds. Located in Field 1 is the text SET; located in Field 2, zero will begin to flash (Fig. 47). 2. PRESS the [Mode] button to accept the flashing zero and start the difference measurement. If the user does not desire to begin the difference measurement, PRESS either the [+] or the [-] button to toggle to the current barometric pressure reading, then PRESS the [Mode] button to exit the setup program. Note: If the user does not press any button for 1 minute in the setup mode, the display will automatically exit setup.
5.2 4-Day memory SUB Mode
In the 4-day memory mode (Fig. 48): Field 1 displays the day of the week the user is in;
In the Barometer mode, PRESS the [Select] button twice to enter this sub mode. This sub mode allows the user to follow changes in pressure over the past 4 days, making weather conditions forecasting possible.
Field 2 displays the atmospheric pressure; and Field 3 displays the time and to the left the text Memory. The Outer Circumference graphically displays the atmospheric pressure where one full circle equals 100 mbars or 1 inHg. To view the information compiled in the 4-day memory: PRESS the [-] button to scroll back down in increments of one hour for the first six hours, after that increments are 6 hours. PRESS the [+] button to scroll back up. Note: Replacing the battery will not erase this information.
5.3 Sea Level Pressure SUB Mode
Sea level pressure is pressure relative to sea level whereas the pressure read in the main barometer display is absolute pressure in the current location. In the Barometer mode, PRESS the [Select] button three times to enter this sub mode. In the sea level pressure mode (Fig. 49): Field 1 displays the text SEA; Field 2 displays the current sea level pressure; and Field 3 displays the current time.

7.1.2 How long will the battery last?
All users employ the product in different ways. Battery life depends mainly on how much the backlight, the compass and the logbook are used. The low-battery warning symbol appears on the display when 5 to 15 percent of battery capacity remains. This should give the user plenty of time to safely change the battery.
7.1.3 What do the segments on the circumference mean?
In the Altimeter mode, one full circle equals 1,000 meters or 1,000 feet. Therefore the segments on the circumference graphically show the user the altitude over a full thousand. When using the difference measurement function of the altimeter, the segments indicate the vertical difference in the elevation over a full thousand either to the right if youre ascending or to the left if youre descending. In the Barometer mode, one full circle equals 100 mbar or 1 inHg, and the segments indicate the pressure over a full hundred mbar or over a full inHg. When using the difference measurement function of the barometer, the segments indicate the change in atmospheric pressure either to the right if the pressure has risen or to the left if the pressure has dropped. In the main Compass mode, the segments indicate the North, i.e. the one segment indicates North and the three segments point South.
If you have set the compass to track a certain bearing, the segments on the circumference indicate the difference between the direction in which you want to go and your actual bearing.
7.1.4 Why do the segments on the circumference go to the left (counterclockwise)?
You are in the difference measurement mode and your unit is showing a decreasing value. Normally, they always go to the right (clockwise) from the 12-noon position. In normal mode, the segment display increases clockwise, but if you are in a mode that shows you differences (such as vertical ascent/descent), all decreasing values go counterclockwise from the center position, and all increasing values go clockwise. So, it is minus to the left (counterclockwise), and plus to the right (clockwise).
7.1.5 Why are there two symbols above the mode texts and what do they mean?
The left-hand symbol indicates that the altitude alarm is activated and the right-hand symbol indicates that one, two, or three daily alarms are activated.

7.2 HEART RATE MONITOR

7.2.1 What should I do if there is no heart rate reading?

1.Check that the elastic strap is snug enough. 2.Check that the electrodes of the transmitter are moistened and that you are wearing it as instructed. 3.Check that you have kept the transmitter clean. 4.Check that there are no sources of electromagnetic radiation in the close vicinity of the Wristop Computer, such as TV sets, cellular phones, CRT monitors etc.
7.2.2 What is the longest time I can set in the timer?
The maximum range of the countdown timer is 23 hours 59 minutes and 59 seconds for each of the 99 intervals.

7.3 Time

7.3.1 Why do the segments on the circumference increase and decrease when I am in the Watch mode?
The main function of the segments is related to the Compass mode, where a division into 36 segments is necessary due to the 360degree scale of a compass. In the Watch mode, the segments show the advancement of seconds. Because the number of seconds differs from the number of degrees, it is impossible for the segments to be consecutively lit up; they now light up or extinguish, thereby marking the passing of every second.

7.4 Altimeter

7.4.1 How do you clear the logbook?
The logbook is self-erasing and cannot be cleared by the user.
7.4.2 How does the logbook self-erase?
The logbook is circular and will start erasing itself when all the memory places are filled. There are approx. 1,900 memory places, each of which contain the altitude, the ascent/descent rate as well as heart rate at that time (according to the chosen interval, 20 seconds, 1 minute, 10 or 60 minutes). When all the memory places are filled, the logbook starts recording new logs on top of the oldest recordings. This is what is meant when we say the logbook is self-erasing. You can clear the history of the logbook; i.e. where you get the cumulative ascent and descent information based on the logs recorded into the logbook.
7.4.3 How many logbooks can you record?
The number of logs you can record into the logbook depends on the chosen interval and the length of each log. For example, if your interval is 1 minute, you can get a total of 1,900 minutes of logs into the logbook. This equals 1.32 days if the recording is continuous (24 hours = 1,440 minutes; 1,900/1,440=1,32). To avoid excessive battery drain, the recording is not continuous. The recording functions have certain timeouts (i.e. the recording will be turned off automatically after a certain time). The timeouts are shorter for the shorter interval and longer for the longer interval.
7.4.4 What is the duration readout?
The duration readout tells you how many hours and/or minutes the event recorded into the logbook lasted. For example, if youre hiking from 1 p.m. to 6 p.m. and the logbook is on during this time, the readout would show a duration of 05:00 hours.

7.6.2 Where do I find the correct declination for my area so I can set my Wristop Computer?
Local declination, either E or W, is usually marked on maps with either one-degree or half-degree accuracy.
7.7 EFFECT OF AIR TEMPERATURE ON ALTITUDE MEASUREMENT
The atmospheric pressure means the weight of air mass above the observer: at a higher altitude there is less air than at a lower altitude. The principle of an altimeter is to measure the different air pressure between different altitudes. The air weight is affected by the outside temperature. Consequently the air pressure difference between two altitudes is also dependant on temperature. The altitude calculation of Wristop Computer is based on the air pressure at certain normal temperatures. Each altitude has a definitive normal temperature. The normal temperatures at each altitude are presented in table 1.
Altitude (m)Altitude (ft)Temperature (C)Temperature (F) Above sea level above sea level 015.0 65613.7 59.0 56.7 54.3 52.0 49.6 47.3 45.0 42.6 40.3 37.9 35.6 30.9
400131212.4 600196911.9843 9.8 8.5 7.2 5.9 4.6 3.3 -0.6

65622.0

-3.226.2 -4.523.9 -7.119.2 -9.714.5 -11.012.2 -14.3 -17.5 -20.8 -24.0 6.4 0.5 -5.4 -11.2
600019686 Table 1. Normal temperatures corresponding to different altitudes
Now the altitude measurement error caused by an abnormal temperature gradient can be approximated as follows. If the sum of the temperature offsets from the normal temperatures determined at two different altitudes is 1 C, the altitude difference calculated by Wristop Computer is 0.2% off the real altitude difference (When using imperial units the offset factor is 0.11% / 1 F). This is because the real temperatures are not always the same as the normal temperatures. A higher than normal temperature causes the calculated altitude difference to be smaller than the real altitude difference (your mountain ascent was actually higher). Consequently, a lower than normal temperature causes the calculated altitude difference to be larger than the real altitude difference (you did not ascend quite as high as displayed). Table 2 shows an example in which the temperature offsets are positive. In this example, the reference altitude is set at 1000 m. At 3000 m the altitude difference is 2000 m and Wristop Computer shows 80 m too little (20 C * 2000 m * 0.002/C = 80 m). Your actual altitude is thus 3080 m. Lower point Higher point 3000 m +6.5 C -4.5 C +11 C Set reference altitude (real altitude)1000 m Displayed altitude Real outside temperature Normal (table) temperature Temperature offset (= real - normal) Sum of temperature offsets Table 2. Example using meters and Celsius +17.5 C +8.5 C +9 C +9 C + +11 C = 20 C
Table 3 shows an example in which the temperature offsets are negative. This time imperial units are used. The reference altitude is set at 3280 feet. At 9840 feet the altitude difference is 6560 feet and Wristop Computer shows 100 feet too much (-14 F * 6560 ft * 0.0011/F = -100 ft). Your actual altitude is thus 9740 ft. Set reference altitude (real altitude) Real outside temperature Normal (table) temperature Temperature difference (= real - normal) Sum of temperature offsets Table 3. Example using feet and Fahrenheit. Lower point Higher point 9840 ft +36.3 F +47.3 F -9 F -9 F + -5 F = -14 F +18.9 F +23.9 F -5 F 3280 ft

13. Disposal of the Device
Please dispose of the device in an appropriate way, treating it as electronic waste. Do not throw it in the garbage. If you wish, you may return the device to your nearest Suunto representative.

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Suunto Oy 9/2009