17
77-121
Vertical Beam Accuracy
P
1
D
1
P
2
P
3
D
1
2 x D
1
P
4
D
1
P
2
P
3
D
1
2 x D
1
P
1
P
1
D
2
1.
Measure the height of a door jamb or
reference point to get distance D
1
. Place
laser unit as shown with laser ON. Aim
vertical beam towards door jamb or
reference point. Mark points P
1
, P
2
, and
P
3
as shown.
2.
Move laser unit to opposite side of door
jamb or reference point and align vertical
beam with P
2
and P
3
.
3.
Measure the horizontal distances between
P
1
and the vertical beam from the 2nd
location.
4.
Calculate the maximum allowed offset
distance and compare to D
2
. If D
2
is
not less than or equal to the calculated
maximum offset distance the unit must be
returned to your Stanley Distributor.
Example: D
1
= 2 m, D
2
= 0,5 mm
0,6 x
2 m
= 1,2 mm (maximum allowed offset distance)
0,5 mm
≤ 1,2 mm (
TRUE
, unit is within calibration)
mm
m
Compare:
D
2
≤ Max
Maximum Offset Distance:
Max
in
ft
= 0,0072 x D
1
ft
mm
m
= 0,6 x D
1
m
Summary of Contents for 77-121
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