The Suunto Heart Rate Belt ANT monitors your heart rate and EPOC and sends the data via wireless technology to your Suunto Watch or PC POD so that you can record and analyze your data after your workouts have ended. Lightweight, durable and extremely comfortable to wear Low power consumption technology - no yearly battery change necessary 100% Water Resistant Comes standard with a medium elastic chest strap (24-34.5 User-replaceable battery
Part Number: SS004806000
UPC: 0045235400157, 045235400157, 6417084048066
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The Wristop Computer is a reliable high precision electronic instrument, intended for recreational use. The outdoor enthusiast who enjoys venturing out into sports like skiing, kayaking, mountain climbing, hiking and biking can rely on the Advizor/Metrons accuracy. The ergonomically designed Advizor/Metron Wristop Computer weighs only 2 ounces (55 g) and features a large number style LCD display intended to be clearly visible in almost any condition. Note: The Wristop Computer is not intended to be used as a substitute for professional or industrial precision measurements and should never be used to acquire measurements when skydiving, hang gliding, paragliding, gyrocopter riding and flying small aircraft. IMPORTANT NOTE: A PULLOUT PAGE IS LOCATED ON THE FRONT COVER. THE PAGE GRAPHICALLY ILLUSTRATES AND IDENTIFIES THE PROPERTIES OF THE WRISTOP COMPUTER AND LCD DISPLAY. IT WILL FACILITATE THE USERS UNDERSTANDING OF THE FUNCTIONS AND PROCESSES NECESSARY TO SETUP THOSE FUNCTIONS.
1.2 MAIN FUNCTIONS (MODES)
The Wristop Computer features five main functions: TIME, ALTIMETER, BAROMETER, COMPASS, and HEART RATE MONITOR. Each function provides several sub modes further enhancing the usefulness to its owner. All main functions (modes) and sub modes are discussed in detail following this section. Note: The Heart Rate Monitor is the premier feature of the Wristop Computer. Details regarding this function are shown in Chapter 2 of this manual.
1.2.1 Water Resistance
The Wristop Computer is waterproof to a depth of 30m/100ft. Note: The Wristop Computer is not a dive instrument, therefore buttons should not be operated (put to use) while under water.
1.2.2 Backlight Features
The Wristop Computer has an electroluminescent backlight. This is initiated by pressing and holding the [Mode] button for 2 seconds. The backlight will remain on for 5 seconds. Pressing any button during this time will restart the 5 second period, continuing the backlight feature.
1.3 BUTTON FUNCTIONS
Four buttons are used to operate the Wristop Computer: [Mode], [+] (ON/OFF), [-] (Fast Cumulative), and [Select].
1.3.1 The [Mode] Button
Is located on the top right of the Wristop Computer. In the main mode level, pressing the [Mode] button allows the user to select or move from one main mode or function to the next (TIME, ALTI, BARO, COMP, HRM). In the sub mode level, pressing the [Mode] button returns the user to the main mode level. In the setup process, pressing the [Mode] button accepts the changes or preferences. Pressing the button again will return the user to the main mode level. Pressing the button for 2 seconds activates the backlight feature.
1.7 CARE AND MAINTENANCE
Perform only the detailed processes discussed in this manual. Do not perform any other service to the Wristop Computer or attempt to open the case or remove the buttons or the bezel. Protect your Wristop Computer from shocks, extreme heat and prolonged exposure to direct sunlight. If not in use, your Wristop Computer should be stored in a clean, dry environment at room temperature. The Wristop Computer can be wiped clean with a lightly moistened (warm water) cloth. Applying a mild soap to the area can clean stubborn stains or marks. Avoid exposing the Wristop Computer to strong chemicals like gasoline, cleaning solvents, acetone, alcohol, adhesives, and paint, as they will damage the units seals, case and finish. Never attempt to take the Wristop Computer apart or service it yourself. Make sure the area around the sensors (backside of the instrument) is kept free of dirt and sand. Never insert any objects into the sensor openings of the Wristop Computer.
When your Wristop Computer needs service, follow the instructions mentioned below. SENDING INSTRUCTIONS 1. Pack the product carefully to avoid damage.
2. Include both the Wristop Computer and the transmitter belt. A full periodic check will be done on the whole product. 3. Include proof of purchase (a receipt or its photocopy) if the product is under warranty. 4. Include a detailed description of the problem. 5. Include your name, return address and daytime telephone number. 6. Ship postage prepaid to your local Suunto dealer or distributor.
1.8.1 Battery Replacement of the Wristop Computer
The Wristop Computer operates on a three-volt lithium cell Type: CR 2430. The maximum life expectancy is approximately 12-18 months. A low battery warning indicator is activated when 5-15 percent of the battery capacity is still available. When this occurs we recommend replacement of the battery. Extreme cold weather may activate the low battery-warning indicator. Though the indicator is activated, the battery may not need to be replaced due to this condition. In temperatures above 10OC (50OF) if the low battery warning indicator is activated, the battery will need to be replaced. Note: Heavy use of the electroluminescent backlight, the heart rate function, altimeter, and compass will significantly reduce the life of the battery. To replace the battery: 1. flip over the Wristop Computer to view the backside; 2. insert a coin in the coin slot located on the battery compartment cover; 3. turn the coin counterclockwise to the open position marked on the back of the case; 4. remove the battery compartment cover; 5. remove the old cell from the battery compartment and ensure the O-ring and all surfaces are clean, dry and not damaged. Do not stretch the O-ring. 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;
2.2 SUUNTO WRISTOP COMPUTER AND INTERFERENCE
ELECTROMAGNETIC INTERFERENCE Disturbances may occur near high voltage power lines, traffic lights, overhead lines of electric railways, electric bus lines or trams, televisions, car motors, bike computers, some motor driven exercise equipment, cellular phones or when you walk through electric security gates. Electromagnetic interference may cause inaccuracy in receiving heart rate signals. The sum of the above, below and in heart rate values may be shorter than the total elapsed time. The reason for this inaccuracy is that the electromagnetic interference may prevent the Wristop Computer from receiving signals of the transmitter belt perfectly.
Persons who have a pacemaker, defibrillator or other implanted electronic device use the Heart Rate Monitor at their own risk. Before starting the initial use of the Heart Rate Monitor, we highly recommend an exercise test under a doctors supervision. This will ensure the safety and reliability of the pacemaker and Heart Rate Monitor when simultaneously being used.
Exercise may include some risk, especially for those who have been sedentary. We strongly advise consulting your doctor prior to beginning a regular exercise program. Disturbances may occur near high voltage power lines, televisions, cars, bike computers, motor driven exercise equipment or cell phones. It is best to position the Wristop Computer within 3 feet or 1 meter of the transmitter. Ensure no other transmitters are within that range; signals from another transmitter(s) can cause an incorrect readout.
Wash the transmitter regularly with mild soap and water after each use. Rinse with pure water; dry thoroughly and carefully. Store in a cool dry place. Never store the transmitter wet. Moisture keeps the electrodes wet and transmitter activated thereby shortening the life of the battery. Do not bend or stretch the transmitter; this may damage the electrodes.
2.5 ACTIVATING THE HEART RATE MONITOR
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 countdown timer (or stopwatch). The memory stores total training time, training interval duration (1dur), maximum, minimum and average heart rate during training, as well as time spent in, above and below target heart rate zone for one event. The next time the countdown timer (or stopwatch) is activated, the previous events information will be erased. There are two types of intervals: training and recovery. The countdown timer can be set to repeat a specific interval a specific number of times automatically. Adjustments to training interval, recovery interval and number of intervals can be made through the setup process. Please note that the HRM memory will only store heart rate information for the training intervals.
2.8.1 How to Set the Countdown Timer
In the Interval Countdown Timer mode: 1. PRESS the [Select] button and hold in for 2 seconds. The first page is the training interval (Fig. 6). Field 1 displays the seconds; Field 2 displays the number 1 indicating the training interval and the number of intervals up to 99; and Field 3 displays the hours and minutes up to 23:59 and the text TIMER.
2. PRESS the [+] button to scroll the seconds upward or PRESS the [-] button to scroll the seconds downward. 3. 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.
4. PRESS the [+] button to scroll the minutes upward or PRESS the [-] button to scroll the minutes downward. 5. 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. 6. PRESS the [+] button to scroll the hour upward or PRESS the [-] button to scroll the hour downward. 7. At the hour value desired, PRESS the [Select] button to move to the next setting. Located in Field 2, the number of intervals can be chosen. 8. PRESS the [+] button to increase the number of intervals up to 99 or PRESS the [-] button to decrease the # of intervals desired. If no repeats of the interval are desired adjust this value to read 01. 9. At the number of intervals desired, PRESS the [Select] button to move to the second page. The second page is the recovery interval (Fig. 7). Field 1 displays the seconds; Field 2 displays the number 2 indicating the Recovery Interval; and Field 3 displays the hours and minutes up to 23:59 and the text TIMER.
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.
2.8.2 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 triplebeep 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.
2.9 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).
CHAPTER 4 ALTIMETER MODE
The Suunto Wristop Computer Altimeter function provides the user with: an adjustable unit of measure either meter or feet: meter ranging from -500 to 9,000; ft ranging -1,600 to 29,500; a resolution of 5m or 10ft; a display update on the rate of vertical movement in intervals of one second for 3 minutes, then every 10 seconds or less; a difference measurement function allowing zeroing of the altimeter for following vertical progress between stages; an automatic 24-hour memory in one hour intervals showing altitude and vertical ascent/descent rate; and A logbook of recordings storing total vertical ascent/descent, average vertical ascent/descent rate, number of runs (e.g. skied), duration of log, as well as minimum, maximum and average heart rate during log, and time spent in, above and below target heart rate zone.
To view and use the Altimeter function: Check the Mode Indicator arrow. If the mode arrow is not on ALTI, PRESS the [Mode] button until the arrow is directly below ALTI. In the ALTIMETER mode (Fig. 21): Field 1 displays the vertical ascent or descent rate;
Field 2 displays the current altitude in increments of 5 meters or 10 feet (depending on the unit of measure selected); and Field 3 displays the current time or the current heart rate if the transmitter is worn. The Outer Circumference graphically displays the altitude in hundreds of meters or feet over a full thousand where one complete circle is equivalent to 1000.
Note: In order for the HRM feature to be activated the user must be wearing the transmitter belt around his/her chest. The HRM indicator in the lower right section of the LCD flashes according to the measured heart rate (beats/minute). Refer to Section 2 Heart Rate Monitor for details in setting and activiting this feature. When wearing the belt, the current time can be viewed for 10 seconds by pressing the [+] button. If the belt is not worn, the current time is shown on the bottom row (Field 3), in place of the heart rate. IMPORTANT NOTE: In order to set the altitude in the Altimeter mode, the altitude must be known. That information can be found by utilizing a topographical map identifying the current location with the associated altitude marked. The user can then proceed and follow the instructions, setting the altimeter, provided in the section below. DETAILS REGARDING THE EFFECT OF AIR TEMPERATURE ON ALTITUDE MEASUREMENT ARE SHOWN ON PAGE 50 OF THIS MANUAL. IF THE ALTITUDE IS NOT KNOWN, THE USER CAN SET THE SEA LEVEL PRESSURE IN THE BAROMETER MODE (refer to page 39, Setting the Sea Level Pressure). SETTING THE SEA LEVEL PRESSURE WILL ADJUST THE ALTIMETER TO THE CURRENT ALTITUDE WITHIN APPROXIMATELY TEN METERS OR 30 ft. A 1-mbar CHANGE RESULTS APPROXIMATELY AN 8METER (OR 26 ft) CHANGE IN ALTITUDE, AND A 0,05 inHG CHANGE RESULTS A 45 ft. CHANGE IN ALTITUDE. INFORMATION ON THE CURRENT SEA LEVEL PRESSURE CAN BE OBTAINED THROUGH NEWSPAPERS, LOCAL NEWS AND RADIO WEATHER REPORTS, THE LOCAL AIRPORT FACILITY OR THROUGH THE INTERNET UNDER LOCAL WEATHER.
The seventh display shows the time spent above the target HR zone selected (Fig. 34).
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. 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. 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.
The eigth display shows the time spent in the target HR zone selected (Fig. 35).
The ninth display shows the time spent below the target HR zone selected (Fig. 36).
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.
4.4.1 Closer examination of the logbook
The logbook can also be viewed at the chosen interval. The Closer Examination display shows vertical ascent/ descent rate and heart rate of the user at a specific altitude and selected interval. This display can be accessed by holding the [Select] button for 2 seconds when in the logbook mode. The text bEG indicating beginning of log will appear in Field 3 (Fig. 37). Move through the displays by pressing the [+] button. The display shows the following information (Fig. 38): Field 1 displays the vertical ascent/descent rate; Field 2 displays the altitiude; and Field 3 displays the heart rate along with the one segment highlighted under HRM.
You can exit the closer examination at any time pressing the [MODE] button.
Note: If the transmitter belt has not been worn during the log recording, Field 3 shows time of measurement. If the user stops to view a certain display in the closer examination of the logbook, the following information will start to scroll automatically in Field 3: time of measurement, date, year, heart rate, time etc.
4.4.2 How to Start and Stop a Logbook
In the Altimeter main mode or the difference measurement sub mode, PRESS the [+] button twice within two seconds. A beep will be heard and the flashing text Log Book will appear in Field 3 to indicate the start of the recording. The recording can be stopped by pressing the [+] button twice within two seconds. A beep will be heard and the Log Book text will be removed from Field 3 indicating recording has stopped. Logbooks are self-erasing and cannot be cleared by the user.
4.5 LOGBOOK HISTORY SUB MODE
The Logbook history shows a summation of all logs recorded. In the Altimeter mode, PRESS the [Select] button four times to enter this sub mode. The logbook history mode features four displays. In the first display (Fig. 40): Field 1 displays the year when the logbook history has last been cleared; Field 2 displays the text HIS; and Field 3 displays the month and day when the logbook history has last been cleared. To the left of the month/ day, displayed is the text Log Book.
PRESS [+] to scroll through the different displays. In the second display (Fig. 41): Field 1 displays the text HI; Field 2 displays the highest altitude reached since the last clearing date; and Field 3 displays the date when it was reached with the text Log Book to the left.
In the third display (Fig. 42): Field 1 displays the text ASC; and Field 2 and 3 show up to a 8 digit accumulative vertical ascent since the last reset. Field 2 is activated when the value of the vertical ascent is beyond the 3 digit value displayed in Field 3. Field 1 displays the text dSC; Field 2 and 3 show up to a 8 digit accumulative vertical descent since the last reset. Field 2 is activated when the value of the vertical descent is beyond the 3 digit value displayed in Field 3.
In the fourth display (Fig. 43):
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 27.25-30.80 inHg / 921-1,080 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 6hour 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
The pressure difference is not referring to the sea level pressure, but to the current barometric pressure measured by the watch.
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.
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 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. In the 4-day memory mode (Fig. 48): Field 1 displays the day of the week the user is in; 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.
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. (Chapter 2, Care) 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.
7.3.1 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 360-degree 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.
7.4.1 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.
7.4.7 Why does the vertical ascent/descent measurement show different readings even though I am inside and staying in the same room?
The resolution of the vertical ascent/descent rate is 1 m/1 ft whereas the resolution of the altitude display is 5 m/ 10 ft, which means that the ascent/descent rate can show movement even though you remain at the same altitude. This is caused by changes in pressure or even vertical movement within the 5 m/10 ft resolution range.
Indoors, even small, unnoticeable air currents cause changes in air pressure. For example, if you have a window open at the other end of your house, the air current may affect a room at the other end of the building so little that you do not notice it, but the sensors of the Wristop Computer do. Because the Wristop Computer measures ascent and descent based on changes in air pressure, it interprets these changes as vertical movement.
7.5.1 What is the little box on the top left of the display?
It is the barometric trend indicator that shows the general direction of weather changes. The display is based on barometer measurements for the last 6 hours.
7.5.2 Does the Wristop Computer show future trends in weather conditions?
No, the Wristop Computer continually accumulates data on barometric pressure existent within a 3 to 6 hour window and displays general barometric trends in weather based on the accumulated data.
7.5.3 What does absolute pressure and relative pressure mean?
Absolute pressure is the actual pressure in any location at any given time. Relative pressure on the other hand equals the corresponding pressure at sea level for a certain altitude that you are at. For example, if you are at an altitude of 1,000 m/3,300 ft the absolute pressure normally is around 900 mbar/26.60 inHg. The relative pressure at sea level would then be around 1,013 mbar/29.90 inHg.
7.5.4 What is temperature compensation?
When the unit is temperature compensated, the altitude measurement of the unit is not affected by the temperature of the unit itself. The unit can be worn on your wrist or placed on a table it will in either case give you the proper altitude reading providing the weather conditions have not changed. All Suunto Wristop Computers are temperature compensated within the range 5 to 140 F / - 20 to +60 C.
7.6.1 What is the purpose of the rotating outer bezel?
The purpose of the rotating bezel is that people can use the instrument as a regular base plate compass if they want to, and use the bezel to e.g. indicate North when in the bearing tracking mode or leaving the compass display for another mode. Also, it can be used to manually follow your vertical progress by using the North indicator on the bezel to mark the altitude from where you want to follow your progress (i.e. a zero point). You could also mark a certain altitude, which is graphically shown by the segments on the circumference, to get an intermediate difference measurement. However, the bezel is mainly related to the compass function.
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) Above sea level 6000
Altitude (ft) above sea level 19686
Temperature (C) 15.0 13.7 12.4 11.1 9.8 8.5 7.2 5.9 4.6 3.3 2.0 -0.6 -3.2 -4.5 -7.1 -9.7 -11.0 -14.3 -17.5 -20.8 -24.0
Temperature (F) 59.0 56.7 54.3 52.0 49.6 47.3 45.0 42.6 40.3 37.9 35.6 30.9 26.2 23.9 19.2 14.5 12.2 6.4 0.5 -5.4 -11.2
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 Set reference altitude (real altitude) Displayed altitude Real outside temperature Normal (table) temperature Temperature offset (= real - normal) Sum of temperature offsets Table 2. Example using meters and Celsius 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. +17.5 C +8.5 C +9 C 1000 m 3000 m +6.5 C -4.5 C +11 C Higher point
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