16
77-119
D
1
P
1
P
2
D
1
P
1
D
1
P
3
P
1
P
2
P
1
P
2
P
3
D
2
90° Beam Accuracy
1. Place laser unit as shown with laser ON.
Mark point P
1
.
2. Rotate laser unit 90° and mark point P
2
.
3. Rotate laser unit 180° and mark point P
3
.
4. Measure the vertical distances between
the highest and lowest points of the group.
