Download
Share
Print this page
Spectra Precision DG613 Information Manual
  1. Manuals
  2. Brands
  3. Spectra Precision Manuals
  4. Measuring Instruments
  5. DG613
  6. Information manual
Spectra Precision DG613 Information Manual

Spectra Precision DG613 Information Manual

Hide thumbs Also See for DG613:

Advertisement

Quick Links

Download this manual
1

Advertisement

loading
Need help?

Need help?

Do you have a question about the DG613 and is the answer not in the manual?

Questions and answers

Related Manuals for Spectra Precision DG613

Summary of Contents for Spectra Precision DG613

  • Page 2: Applications And Setups

    Manhole Applications and Setups stake This section describes three fundamentals for using the Model DG813/613 to install gravity flow pipe; they are Grade, Elevation, and Manhole Line otherwise known as G-E-L. stake Grade Line To install gravity flow pipe, the pipe is set to a percentage of Grade that Elevation has been determined by some engineered plans.
  • Page 3 GRADE: Grade establishes the slope of the pipe and is generally displayed in percent (%). A rise of 1ft (1 m) over a run of 100-ft (100 m) equals 1.00%. After setting Grade into the unit, the laser automatically slopes the beam to match the slope of the pipe and maintain its slope if disturbed.
  • Page 4 Setup, Step by Step: Set Elevation for Small In-the-Pipe or Pre-cast Inverts: 1. The Laser automatically centers in the 6-inch (150-mm) diameter pipe and pre-cast inverts without using any additional accessories. 2. The Laser automatically centers in 8-inch (200-mm) diameter pipe with the 1248 mounting plate.
  • Page 5 Illustration Set Up 1230 1237 1248...
  • Page 6 Elevation of Flat Bottom Manholes 1. When a Laser is to be set on a flat surface where the laser beam is not centered in the pipe, use model 1230 Heavy Duty Trivet Plate and Universal Fixed Pole. 2. Using this system, the elevation of the laser beam can be set by either measuring down from a grade offset hub outside the trench or up from the floor of the manhole to the beam.
  • Page 7 Features: 1. Pole Clamp – slides onto the vertical pole and is secured with the pole clamp’s handle. 2. Top Pole Scale (TPS) – determines the distance between the top of the pole to the center of the laser beam. 3.
  • Page 8 Method 1: Using the Top Pole Scale (TPS) Grade rod set on top of the Universal Fixed Pole. Note: You must first decide what elevation the laser beam shall be used above the invert! 1. Record the “cut-to-invert” information from the grade hub. 2.
  • Page 9 Example 1: Setting the Grade Rod on top of the Top Pole Scale Step Description Feet / Inch Metric Decide what elevation the laser beam shall be Step 1 0.5 ft 0.152 m used above the invert. Record the “Cut to Invert” information from Step 2 2.64 ft 0.805 m...
  • Page 10 Rod reading on top of laser 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.
  • Page 11 3. Set up an automatic level and measure the elevation of the automatic level above the Rod reading grade hub. on grade 4. Add elevation measurement of instrument Rod reading on to “cut-to-invert” from grade hub. top of laser 5. Subtract the desired working of elevation of Cut to invert laser beam above invert 6.
  • Page 12 Add elevation measurement of instrument to Step 4 5.38 ft 1.635 m “cut-to-invert” from grade hub. Subtract the desired elevation of laser beam -0.152 Step 5 -0.50 ft above the pipe’s invert. Step 6 Subtract beam offset (0.23 ft / 70 mm). -0.23 ft -.070 m 0.805 m...
  • Page 13 Setting Line 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): 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 bulls-...
  • Page 14 Second Far-Point Alignment: Next manhole 1. Simultaneously press both Left and Right Line buttons to center the laser’s +10° of line travel. 2. Press either Line button to align the laser beam to the second control point. If using a wireless remote control, point the remote towards the laser and press the appropriate line button.
  • Page 15 Press and release the M button at the standard display and select Line Set/Check using the (+)/(-) and left/right buttons. Pressing and releasing E button activates the Line Set/Check mode while the flashing Line Set/Check symbol appears together with a bubble vial.
  • Page 16 Laying Pipe/Setup 1. First Day Setups -Use the line buttons to align the laser to the next manhole. 2. Second day setups - Select a target that can establish the centerline or distance above the invert in your pipe too the correct grade, elevation, and line set the laser in the last pipe checked to be set.
  • Page 17 . Set an adjustment pipe target so that the target’s bull eye is at the same distance above the invert as your laser. 3. Place the pipe target in the last section of the pipe that has been checked to be at the correct grade, elevation and line. 4.
  • Page 18 In a Manhole The Laser can be setup in a manhole using a transit to accurately set line. The transit is plumbed over the laser on a mount that clamps to the manhole. The laser is projected down the center of the pipe. 1.
  • Page 19 Line (transit method) 1. Set a manhole mount and transit on the manhole. 2. Clamp the manhole mount base to the side of the manhole to establish a stable transit support. 3. Secure the vertical arm into the manhole mount base. 4.
  • Page 20 7. After rough positioning the transit over the bulls eye target, use the transit's leveling base to accurately adjust the transit to the bullseye Next manhole target. 8. Once the transit is set over the Laser’s bulls eye target, sight the transit on the centerline of the next manhole and lock the scope on line.
  • Page 21 2. Set an adjustable pipe target (Model 936 or 956) so that the target’s bulls eye is at the same distance above the pipe as your Level vial laser beam. 3. Place the pipe target on top of the last section of pipe that has Undisturbed pipe set at correct grade been checked to be at the correct grade, elevation, and line.
  • Page 22 6. Attach the Laser to the 1239 Universal Fixed Pole. 7. Sight through the transit at the Laser. 8. Adjust the Laser and the mounting plate until the bullseye target or “+” symbol on the positive grade button is aligned with the transit’s vertical crosshair. 9.
  • Page 23 Over the Top The Laser can be set on a tripod or mounting plate above the excavation on the pipe itself. A laser target is mounted on a pole and is adjusted to give the correct distance from the beam to the pipe invert.
  • Page 24 DG813/613 Additional Accessories 1248 Mounting Plate Allows the laser to automatically center in an 200 mm (8 inch) diameter pipe using 1248 mounting plate. 1244 and 1244-1 T-Bars The 1244 T-Bar is a mounting support system for using a Laser in large diameter pipe, manholes, or open excavated trenches where high stability and a variable elevation adjustment is required.
  • Page 25 1. Extension Bar – allows for one-inch (25 mm) coarse adjustments in the T-Bar’s overall length. 2. Locking Pin – holds the extension bar in place. 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.

  • Page 26: Setup Instructions

    Setup Instructions: 1. Attach the vertical pole to the T-Bar. 2. Adjust the length of the T-Bar using the locking pin to fit your setup. NOTE: The “T” section of the bar must be vertical. 3. Use the speed release handle to secure the T-Bar in the manhole or large pipe at a position that enables the vertical pole to support the laser at the predetermined elevation.
  • Page 27 Through the Pipe Applications: For pipes with a diameter of 21 inches (500 mm) or less, the laser beam is normally projected on the centerline of the pipe. When the target is calibrated to the pipe’s diameter, the target may be used in any orientation in the pipe to maintain the target’s bullseye on center with the pipe.
  • Page 28 4. Target Clamps – secure the target into position. 5. 2 x Level Vials – provides a level reference for the 936 whether it is used upright or inverted. A level target is required where the elevation of the beam is at some distance above the invert other than the pipe’s centerline.
  • Page 29 Refraction 1. Refraction is the bending of light at the interface of two substances caused by a difference in the speed of light. Shooting a laser beam through a pipe having gas and varying temperatures can be compared to shining a flashlight beam into a pool of water and seeing the light bend. 2.
  • Page 30 7. To fully minimize the effects of refraction, it is advisable to use a blower after the pipe run exceeds 50 feet (15 m). Operate the blower at a speed that minimizes the effects of refraction. As the pipe length increases, increase the speed of the blower. Nozzle 8.
  • Page 31 12. Another solution is to have a Homelite III-B blower (or equivalent) at the cut end of the trench pulling these fumes from the cut as the electric blower blows them out of the pipe. This method does not tie up production and gets the job done more efficiently. 13.
  • Page 32 Calibration Checking Calibration...
  • Page 33 Checking the calibration of your pipe laser is easy. All you need is an engineer’s rule and your pipe laser. 1. Select a level road, packing lot or field whose rise is not more than 4 inches in 100 feet (10 cm/30 m).
  • Page 34 8. Accurately measure the elevation to the center of the beam at point B and record the elevation as B1. 9. Move the pipe laser behind point B and aim the laser beam so that it passes over points A and B. Allow the pipe laser to self-level.
  • Page 35 Grade Check After the first 25 – 50 feet (8 – 15 m) of pipe has been laid, it is recommended that you make a grade check to insure that the setup is correct, and that the system is properly operating. The illustration shows a method for checking grade.
  • Page 36 Example: Feet / Tenths 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...

This manual is also suitable for:

Dg813