15
77-121
5.
Measure the vertical distance from
the floor to each point. Calculate the
difference between distances D
P1
and D
P3
to get D
3
and distances D
P2
and D
P4
to get
D
4
.
1.
Place laser unit as shown with laser
ON. Aim vertical beam to first corner or
reference point. Measure out half of the
distance D
1
and mark point P
1
.
Horizontal Beam Accuracy
P
1
D
1
D
1
2
D
1
2
6.
Calculate the maximum allowed offset
distance and compare to the difference
of D
3
and D
4
as shown in the equation. If
the sum is not less than or equal to the
calculated maximum offset distance the
unit must be returned to your Stanley
Distributor.
Example: D
1
= 10 m, D
2
= 0,5 m
D
P1
= 30,75 mm, D
P2
= 29 mm, D
P3
= 30 mm, D
P4
= 29,75 mm
D
3
= (
30,75 mm
-
30 mm
) = 0,75 mm
D
4
= (
29 mm
-
29,75 mm
) = - 0,75 mm
0,3 x (
10 m
- (2 x
0,5 m
) = 2,7 mm (maximum allowed offset distance)
(
0,75 mm)
- (- 0,75
mm)
= 1,5 mm
1,5 mm ≤ 2,7 mm (
TRUE
, unit is within calibration)
mm
m
P
3
P
1
D
P3
D
P1
(D
P1
- D
P3
) = D
3
P
4
P
2
D
P2
D
P4
(D
P2
- D
P4
) = D
4
Compare:
D
3
- D
4
≤ ± Max
Maximum Offset Distance:
Max
in
ft
= 0,0036 x (D
1
ft - (2 x D
2
ft))
mm
m
= 0,3 x (D
1
m - (2 x D
2
m))
Summary of Contents for 77-121
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