AccuLine 40-6910 Kullanım Kılavuzu - Sayfa 7

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AccuLine 40-6910 Kullanım Kılavuzu
2595H
7/29/09
With an adjusting screw "A" facing to the right
of the bubble and with telescope directly in
line with two of the three leveling screws,
note to which side the bubble is off. If to the
left, loosen screw "B" and tighten screw "A"
very slightly to remove ONE-HALF the error.
Remove the other half of the error with the two level screws in line
with the telescope. If the bubble is still not exactly centered, repeat
the procedure. If bubble is off to the right, loosen screw "A" and
tighten screw "B". Otherwise the procedure is identical.
5.2 Instrument accuracy check
Set up the instrument in an area that is as level as possible and which is
about 220 ft. long. Place two matching level rods about 200 ft. apart
with the faces toward each other. Position and level the instrument so
that the distance from the instrument to each rod is the same. (Fig. 1)
Take a reading on each rod with the instrument. Note the difference
and record them. Next, move the instrument to another point in line with
the two level rods as shown in Fig. 2. Level the instrument and take
readings on the two level rods. The difference should be the same
(A-A should equal B-B). The difference between A-A and B-B is
the instrument error at 200 feet.
©2009 Johnson Level & Tool
10:15 AM
Page 7
Bubble
level
screws
Fig. 1
Fig. 2
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