Spectra DG711 Manuel d'utilisateur télécharger pdf (Page 48)

Applications and Setups 5

DG711 and DG511 Pipe Laser User Guide 41

Setting Line 5.4.6

The principle for setting line is

always the same. The laser is

positioned over the starting point

of the pipe run then aimed to the

second control point on line. The

further your second point is from

the laser, the more accurate your

line will be.

First Point Setup (Using

Plumb-bob) 5.4.7

Whether using the laser in the

invert or attached to the various

mounting plates the goal is to

always set the laser’s line axis

bull’s-eye target over the vertical

centerline of the pipe.

Step 5 Subtract the desired elevation of laser

beam above the pipe’s invert.

-0.152 m -0.50 ft

Step 6 Subtract beam offset (70 mm / 0.23 ft). -.070 m -0.23 ft

Step 7 Calculated Rod Reading = 0.805 m

1.128 m

-0.152 m

-0.070 m

1.711 m

2.64 ft

3.70 ft

-0.50 ft

-0.23 ft

5.61 ft

Step 8 Set the rod on top of the Laser and

adjust elevation until the correct rod

reading is observed.

1.711 m 5.61 ft

Step 9 The laser beam is now set at your desired working elevation

(152.4 mm / 6 inches / 0.5 ft) above the invert of the proposed

pipe.

Table 5.3 Example 2: Setting Grade Rod on Top of Laser

Step Description Metric Ft / Inch

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 95 96

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Spectra DG711 Manuel d'utilisateur Page 48