Suunto Tandem User manual

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SUUNTO TANDEM

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hile we have taken great care to ensure that information contained in this
documentation is both comprehensive and accurate, no warranty of accuracy is
expressed or implied. Its content is subject to change at any time without notice.
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Suunto Tandem
USER'S GUIDE
EN

3
TABLE OF CONTENTS
SUUNTO TANDEM, TWO PRECISION INSTRUMENTS IN ONE ....................4
ADJUSTING OPTICS .........................................................................................4
CLEANING THE TANDEM .................................................................................5
CONTACT MEASURING ...................................................................................6
BEARING COMPASS ........................................................................................7
COPYRIGHT, TRADEMARK AND PATENT NOTICE .....................................11
ISO 9001 ..........................................................................................................11
CLINOMETER ..................................................................................................11

4
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 construction renders the Suunto Tandem most suitable for every type
of work. Its unique shape makes it comfortable to hold in your hand. The optics of the
Tandem can be adjusted to make the reading easier. The clinometer scale is in
degree and percent (0 – 90°, 0 – 150 %) while the compass scale is azimuth (0 –
360° with reverse scale). Both the clinometer and compass are graduated in 1° / 1 %
increments and each is individually calibrated. The two edges at 90 degrees angle
make the contact measurements possible, for example, when installing and
positioning a satellite antenna.
ADJUSTING OPTICS
The optics of the Tandem can be adjusted by turning the eye
piece with your fingers as shown in Figure 1. Adjust the eye
piece so that both the hairline and the scale are sharp and the
eye piece slot settles in a vertical position in the bearing
compass and in a horizontal position in the clinometer.
Fig. 1. Adjusting optics

5
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.
0
90
90
Code:
PM-5/360PC
TANDEM
W
E
N
S
Fig. 2. Removing the eye piece

6
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.
TWO CONTACT
EDGES
0
90
90
Code:
PM-5/360PC
TANDEM
W
E
N
S
Fig. 3. Edges for contact
measurement

7
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 magnetic field could make the compass card dip and this may cause
difficulties in taking the bearing. The balancing zone (see Fig. 4), if other than one, is
indicated on the back of the instrument below the serial number, contact your dealer
for details.
2
1
4
3
5
Fig. 4. The balancing
zones

8
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
distance. Large structures like buildings, reinforced concrete quays etc. will cause
deviation at some distance. A reverse sighting from the opposite end of the target line
will show up any deviation present.
Operation
With both eyes open, aim the compass so that the hairline is superimposed on the
target, when viewed through the lens. The main scale (large numbers) gives the
bearing from your position to the target, the small numbers give a reverse bearing
from the target to your position. This feature is of great assistance when calculating a
precise position.
Use the left or the right eye as preferred. With both eyes open, an optical illusion
makes the hairline appear to continue above the instrument frame, superimposed on
the target. This improves reading accuracy and speed.

9
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 and is seen against the target (Fig. 5).
0
90
90
Code:
PM-5/360PC
TANDEM
W
E
N
S
0350
10
190 180 180
View
Fig. 5. The hairline is seen against the target