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Spectra Precision DG613, Information Manual

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Method 2: Setting Grade Rod on Top of Laser 

Note:  

Using this method, the offset distance of 0.23 ft (70 

mm) between the top of the Laser housing and the center of 

the laser beam will be used. 

1. Decide what elevation of the laser beam shall be used  
    above the invert. 
2. Record the “cut-to-invert” information from the grade hub. 

 

Rod reading on top of laser 

Summary of Contents for DG613

Page 1: ...1...

Page 2: ...stalled between two designed points therefore defining Line The process for setting up the Model DG813 613 remains the same The laser beam shall be sloped to match the plans The Elevation of the pipe...

Page 3: ...guration ELEVATION Depending on the application and jobsite conditions the laser may be set to an elevation that matches either the centerline of the pipe at some distance above the invert of the pipe...

Page 4: ...atically centers in 8 inch 200 mm diameter pipe with the 1248 mounting plate 3 Use the following chart to determine how to setup the laser so the laser beam is centered in the following pipe sizes Pip...

Page 5: ...Illustration Set Up A 1230 B 1237 C 1248 1 2 3 4 5...

Page 6: ...1230 1237 Heavy Duty Invert Plate The invert plates model 1230 English and 1237 Metric are one piece cast aluminum support plates that provides automatic self centering of the Laser in 10 in 250 mm 12...

Page 7: ...en the top of the pole to the center of the laser beam 3 Mounting Plate Scale MPS determines the distance between the center of the laser beam and the bottom of the Model Mounting Plate This scale is...

Page 8: ...tomatic level above the grade hub 3 Set a grade rod on top of the 1239 Universal Fixed Pole and record the measurement with the automatic level 4 Subtract the desired elevation of the laser beam above...

Page 9: ...m Step 4 Subtract the measured distance from the optical instrument to the top of 1239 Universal Fixed Pole 5 38 ft 1 635 m Step 5 Subtract the desired elevation of the laser beam above the pipe s in...

Page 10: ...fset distance of 0 23 ft 70 mm between the top of the Laser housing and the center of the laser beam will be used 1 Decide what elevation of the laser beam shall be used above the invert 2 Record the...

Page 11: ...levation of the laser until the correct rod reading is observed 9 The laser beam is now at the proper working elevation Example 2 Setting Grade Rod on Top of Laser Laser beam distance above invert Rod...

Page 12: ...ct beam offset 0 23 ft 70 mm 0 23 ft 070 m Step 7 Calculated Rod Reading 2 64 ft 3 70 ft 0 50 ft 0 23 ft 5 61 ft 0 805 m 1 128 m 0 152 m 0 070 m 1 711 m Step 8 Set the rod on top of the Laser and adju...

Page 13: ...t the Laser s line axis bulls eye target over the vertical centerline of the pipe This is accomplished by one of the following methods 1 Place the bulls eye target under a plumb bob that has been tran...

Page 14: ...er you press the line button To slow the line speed release the line button then press again Setting Line with the Line Set Check Feature Line Set Check can be used to align the beam to a forward grad...

Page 15: ...tered and the Line Set Check symbol stops flashing Pressing and releasing the E button starts the beam moving automatically up to 45 Using the or button at the RC803 remote control or at the laser sto...

Page 16: ...pe checked to be set 3 Align the laser to the target using the line buttons on the Laser or using the wireless remote 4 Lay Pipe set the target in each new section of pipe and adjust the pipe until th...

Page 17: ...has been checked to be at the correct grade elevation and line 4 Adjust the pipe target until it s level vial reads level 5 Align the laser to the target s bulls eye using the line buttons on the Lase...

Page 18: ...the Laser support in the manhole and attach it to the support 2 Adjust the laser to the chosen height above the invert and on the vertical centerline of the exit hole for the proposed pipe 3 Point the...

Page 19: ...Laser 5 Attach your transit to the 5 8 x 11 M16 threaded adapter in the horizontal arm 6 Transit Alignment You may position your transit over the Laser s bulls eye target in one of the following metho...

Page 20: ...il it is aligned with the vertical crosshair of the transit 12 Lay pipe Set the pipe target in each new section of pipe and adjust the pipe until it intersects the target s bulls eye NOTE This method...

Page 21: ...Set the target on top of each new section of pipe and adjust the pipe until the laser intersects the target s bulls eye while the target is level Open Excavations 1 Set a transit over the first point...

Page 22: ...Set an adjustable pipe target Model 936 or 956 so that the target s bullseye is at the same distance above the invert as your laser beam 13 Place the pipe target in the last section of pipe that has...

Page 23: ...Laser to a tripod having a 5 8 inch x 11 thread 2 Set the tripod and Laser on line behind the first manhole and insure the system is level 3 Suspend a plumb bob from the tripod or use a Laser Plummet...

Page 24: ...variable elevation adjustment is required The 1244 can be used with a 1239 Universal Fixed Pole for precast invert setups for unobstructed flowlines The 1244 can also be used in large diameter pipe t...

Page 25: ...e 3 Mounting Plate supports the Laser or the 1239 Universal Fixed Pole 4 Speed Release Handle tightens the T Bar into place and allows for quick release 5 Horizontal Lock Knob allows the mounting plat...

Page 26: ...evation 4 Loosen the horizontal lock knob to allow the laser and mounting plate to be adjusted to the line of the pipe Pipe Targets The correct target you use depends on the elevation of the laser bea...

Page 27: ...0 mm rigid or thick walled plastic pipe of a length to match your setup will be needed Model 936 Adjustable Pipe Target The 936 Adjustable Pipe Target centers the laser beam in 15 to 30 inch 400 to 80...

Page 28: ...at some distance above the invert other than the pipe s centerline 6 Lock secures the target frame to a 2 x 4 when the 936 is being used in large diameter pipe Model 956 Optically Enhanced Universal T...

Page 29: ...rom the glue used at joints or on very cold days when a cold pipe is placed in a warm trench 4 Refraction is a small diameter pipe problem When small diameter pipe is set it is recommended to place th...

Page 30: ...ill push the warmer gas through the pipe If a strong wind is blowing down the pipe and fighting the blower it may not be needed 10 In large diameter pipe 18 inches 45 cm and larger it is better to pos...

Page 31: ...tomotive battery to power the blower 2 Point the nozzle into the pipe to create a corkscrew effect This is the most effective way to create temperature stabilization 3 Insure the air intake is not blo...

Page 32: ...Calibration Checking Calibration...

Page 33: ...so mark them well 3 Set up the pipe laser just behind the lowest point and rough level 4 Turn on the pipe laser and let it warm up for about 10 minutes 5 Set the grade counter to 0 000 6 Aim the laser...

Page 34: ...int A and record the elevation as A2 12 Subtract the A1 and B1 elevation readings from A2 and B2 elevation readings Note Your laser is in calibration if the difference between A2 A1 equals B2 B1 Note...

Page 35: ...at the beginning of the pipe A 2 Using the same instruments obtain a level reading at the end of the pipe B 3 The difference between the readings equals the rise over the run 4 In terms of of grade r...

Page 36: ...nths Metric Rod Reading at A 15 74 feet 4 801 m Rod Reading at B 12 289 feet 3 749 m Rise or Difference A B 3 451 feet 1 052 m Distance from A to B 145 feet 44 196 m Rise divided by Run 0 0238 0 0238...

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