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In case the height differences are not equal, the instrument has to be
adjusted according to the following procedure:
2. Adjustment:
Calculate the value b
crosshairs, with the aid of the calibration screws, which
are visible behind the eyepiece once the protective cap
has been removed, to the calculated setting b
b
= a
-a
+b
2nominal
2
1
1
a) In case b
is smaller than b
2
crosshairs by turning screw 2 until b
tighten calibration screws against each other.
b) In case b
is larger than b
2
operating screw 1 until b
screws against each other.
Repeat control of the adjustment until you get the result (a
3. Vertical adjustment:
The crosshairs can be rotated to achieve vertical adjustment
(loosen calibration screws). Afterwards, the instrument must
be adjusted horizontally again.
Then screw on the protective cap again.
Formulas:
(a
-b
)=(a
-b
)
1
1
2
2
b
= a
-a
+b
2nominal
2
1
1
Care and storage
7
1. Use a soft cloth to clean instrument from dust and dirt.
2. Carefully clean lens and ocular with a soft and clean cloth, cotton or a soft
brush, use no liquids other than pure alcohol. Do not touch any surfaces of
the lenses.
3. After use under wet weather conditions, container and instrument are to be
field-cleaned and then, at home, left to dry thoroughly with the container
open.
4. For carrying the instrument over long distances, it is best to place it in its
container. Attention: Levelling screws to be turned all the way in.
= a
- a
2nominal
2
1
2nominal
, loosen screw 2 and adjust crosshairs by
2nominal
= b
2
2nominal
is the result of: b
+ b
and adjust the
1
2nominal
, loosen screw 1 and move
= b
. After that, carefully
2
2nominal
. After that, carefully tighten calibration
= a
-(a
-b
)
2nominal
2
1
1
AL 22 / 26 Classic
.
- b
) = (a
1
1
1
2
- b
).
2
2
GB
13
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