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EN Suunto Tandem USER'S GUIDE
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TABLE OF CONTENTS SUUNTO TANDEM, TWO PRECISION INSTRUMENTS IN ONE .................... 4 ADJUSTING OPTICS ......................................................................................... 4 CLEANING THE TANDEM ................................................................................. 5 CONTACT MEASURING ................................................................................... 6 BEARING COMPASS ..............................................................................
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SUUNTO TANDEM, TWO PRECISION INSTRUMENTS IN ONE Congratulations on your choice of the Suunto Tandem. The Suunto Tandem is all you need for both slope/height measurements and compass bearings. It is a liquid-filled precision compass and clinometer in one compact aluminum housing that is easy to use and rugged enough to protect against impact, corrosion, and water. This top- quality precision instrument combines precision accuracy with fast and easy one- hand operation. The pocket-size constructio
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CLEANING THE TANDEM In the case humidity or dirt develop inside the Tandem it can be cleaned by removing the detachable eye piece. The eye piece can
be removed by rotating it counter-clockwise (Fig. 2). Rinse with clean water, allow to dry and carefully reassemble the eye piece. Caution! Do not use detergents or solvents of any kind as they might cause damage to the capsules. Fig. 2. Removing the eye piece 5
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CONTACT MEASURING The Tandem can be used for aligning satellite dish antennas or for other type of contact mea- suring. The clinometer incorporates two different contact edges (see Fig. 3) which enable the mea- surement to be made compared to the horizontal or vertical plane. The scale (0 – 90 – 0 degrees)
can be used in contact measuring and it gives the angle of the surface compared to the contact plane. Fig. 3. Edges for contact measurement
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BEARING COMPASS Construction The bearing compass is designed to combine extreme accuracy with ease and speed of operation. The card is supported by a jewel bearing and it is immersed in a dampening fluid, giving vibrationless, smooth movement. The compass has been given permanent antistatic treatment. Inclination - balancing The compass card is balanced to correspond to area within which the compass is used. When using the compass elsewhere (e.g. on trips abroad) the change of the vertical magne
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Declination The compass reads magnetic north, which differs from true north by the amount of the local declination which is printed on your map. In order to lay out on a map a bearing obtained with the compass, the plus or minus declination for the locality in question must be added to or subtracted from the compass bearing. Deviation Iron and steel objects close to the compass, like a wristwatch or steel rimmed eyeglasses, may cause deviation. Whenever possible, remove such objects to a safe di
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Because of an eye condition called heterophoria, the reading accuracy of some users may be impaired. Check for this as follows: Take a reading with both eyes open and then close the free eye. If the reading does not change appreciably there is no disalignment of the eye axes, and both eyes can be kept open. Should there be a difference in the readings, keep the other eye
closed and sight halfway above the instrument body. The hairline now rises above the instrument body a
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The instrument can also be used for triangulation, see Fig 6. The bearings obtained from the main scale are 0° against the hill and 64° against the curve of the road, or 180° and 244° on the reverse scale. Your own location is indicated by the intersection point of these two lines. When performing very accurate posi- tioning tasks the bearings obtained have to be corrected t for local declination. The co-tangent table at the back of the Tandem can be utilized 90° for distance calculations, and 6
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COPYRIGHT, TRADEMARK AND PATENT NOTICE These instructions are copyrighted and all rights are reserved. It may not, in whole or in part be copied, photocopied, reproduced, translated, or reduced to any media without prior written consent from SUUNTO. SUUNTO, Tandem and their logos are all registered trademarks of SUUNTO. All rights are reserved. Patents have been issued or applied for one or several features of this product. ISO 9001 SUUNTO 0y's Quality Assurance System is certified by Det Nor
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Instructions for use Readings are usually taken with the right eye. Owing to differences in the keenness of the sight of the eyes and because of personal preferences the use of the left eye is sometimes easier. It is of prime importance that both eyes are kept open. The sup- porting hand must not obstruct the vision of the other eye. The instrument is held in front of the reading eye so + AND - + AND - DEGREE PER CENT that the scale can be read through the eye piece, SCALE SCALE and the round si
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The task is to measure the height of a pillar at a distance of 25 m [82 ft] on level ground (Fig. 8). 12 m [38 ft] The instrument is tilted so that the hairline is seen against the pillar-top (apex). The reading 48 % 25 ½° obtained will be 48 % (ca 1.6 m [5½ ft] 25½°), As the distance is 25 m [82 ft] 25 m [82 ft] the height of the pillar is 48 / 100 x 25 = ca. Fig. 8. Measuring height of a pillar 12 m [48 / 100 x 82 ft = ca. 39 ft]. To this must be added the eye's height from the ground, e.g., 1
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of the horizontal distance. For example (Fig. 9), if the apex reading is 41 % and the ground reading 13 %, the total height of the pillar measured from a distance of 25 m [82 ft] is (41 + 13) / 100 x 25 m = 54 / 100 x 25 m = ca. 13.5 m [(41 + 13)/100 x 82 ft = 54/100 x 82 ft = ca. 44 ½ ft]. When the pillar base is above eye level, the base reading is subtracted from the apex reading, and the total height is the difference percentage of the horizontal distance. For example (Fig. 10), if the apex
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All readings on the percentage scale are based on the horizontal distance. This means that if the distance on sloping terrain is measured along the ground an error is introduced, and this must be corrected for accurate results. The error is insignificant for most purposes at small ground slope angles but increases progressively as the angle increases. The trigonometrical correlation is H = h x cos a where H = the true or corrected height, h = the observed height and a = the ground slope angle.
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When calculating the hori- zontal distance by using the ground distance and the slope angle, it must be pointed out that an error is 29% introduced if the slope is 24.7 m [81 ft] 1.6 m 9% 23% measured from eye level to [5½ ft] the pillar base. Measuring 1.6 m the slope along the ground [5½ ft] would be cumbersome and inconvenient. No error is introduced, however, when Fig. 11. Calculating horizontal distance by using the slope angle is mea- ground distance and slope angle sured from eye level t
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Take 52 per cent of 25 m [82 ft]. This is 13 m [42.6 ft]. Multiply this by the cosine of 9 degrees. 0.987 x 13 m = 12.8 m [0.987 x 42.6 fl = 42 ft] Method 2. Multiply the ground distance by the slope angle cosine (strait distance). 0.987 x 25 m = 24.7 m [0.987 x 82 ft = 80.9 ft]. Add percentage readings as above and take the sum percentage of the corrected distance. 52 / 100 x 24.7 m = 12.8 m [52 / 100 x 80.9 ft = 42 ft]. This example shows that a slope angle of 9 degrees causes a correction of
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First, find on the right-hand scale in the nomogram the point indicating the L-20 apparent height. Secondly find on the left- m hand double scale the point indicating the m m Downhill 20 20 2 0 ground point reading. Thirdly, connect 4 1 19 5 2 19 18 these points. The corrected reading will 6 3 17 18 7 be found from the pertinent middle scale Uphill 16 4 8 17 at the point of intersection. In this 15 5 9 14 16 procedure the slope angle can be 6 10 13 neglected as the left-hand ground point 15 12 7
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Suunto Tandem GUIDE DE L'UTILISATEUR FR
