Sunday, March 10, 2013

Fine leveling instructions(TOTALSTAION)


1) Set plate level (the one in the tube--this is the fine level) parallel to two footscrews. Center plate level bubble by adjusting these two screws in equal and opposite directions.
2) Turn Theodolite through 90°. Center bubble with third footscrew.
3) Turn Theodolite through 180° (in the same direction as above). Note position of bubble. Turn the third footscrew (same one used in step 2) to bring the bubble to a point halfway between the position noted and the centered position. Use the adjusting pin (in silver handle in the Theodolite case) to turn the adjustment screw until bubble is centered (see page 44 of the Theodolite manual for a picture).
4) Repeat until bubble remains centered within a single division for any position.
Note that the instrument will drift out of level as the day progresses. Repeat the above steps as needed and enter change by pressing the level button (see Operation). If the optical plummet is not above the ground point desired, slacken tripod fixing screw and move instrument over tripod plate until cross hairs coincide with ground mark. Only translate the instrument over the tripod plate, do not rotate. Retighten fixing screw. Now press the ON button and the startup menu will come on. Press the white LEVEL (figure 1) key along the bottom of the key panel followed by continue. When the levels are set press the continue button.
Now that the instrument is leveled up, set up and test the electronics. First, insert the Verbatim SRAM card into the slot in the Theodolite. Ensure that the arrow on the back of the card faces down when you insert it. See below for a suggested initial key sequence for the Theodolite and see the TPS-System 1000 Short Instructions System manual in the Theodolite case for a list of commands for the Theodolite. The keypad on the Theodolite allows for maximum utility with the minimum number of keys. Therefore, most of the keys have several functions, depending upon the class of operation. One way to remember the meaning is by noting the background color of the keys.
Table 3. Classes of keypad operation for Theodolite (TCM-1100) (Short Instruction Book) See Figure 2.
Class of operation
Key color
Example
Fixed Keys White Functions which are always available. Returns to last diologue. ON OFF.
Function Keys Orange These keys correspond to the bottom line on the display. Pressing SHIFT followed by an F key displays other options.
Navigation Keys
Green Vertical scrolling, position the cursor to edit, insert or delete numerical data and characters, and position colums.
Numeric Keys Yellow 1...9 Numerical input. ". " and +/- set decimal place and sign. The Enter key to complete the data input of confirm a selection out of a data list. Use the CE key to delete the last entered digit or character.

Figure 1. Keypad.
The ENTER button is important in that it executes the preceding commands or answers in the affirmative, while the CE button often clears the last command. Before anything, start with a fresh copy of the Survey Record Form, and fill out the important details at the top. Use this form to take notes while surveying. Remember to record all observations and considerations, since the next time you look at this data, it might 6 months from now in the Dungeon! Record the observations so that someone else can understand. After all, someone else might use the data.
Table 4. Suggested command sequence for Theodolite start up  
#
Key sequence
Description
1
Switches Theodolite on. Screen briefly displays software version.


2
  After the bubble is level press the Continue button. You can check and adjust level all day.




3
    Select the setup file by pressing F5 (Setup) and using the arrows to select file. Press F6 to get the list of files. Push enter to select (button with curved stem). It is also possible to set user templates based on many different users or survey types with different needs. We will go through the template setup later in the sequence. Press Continue to go to the SETUP/ STATION DATA menu.
4
x 4 Enter the station number (is it your first one of the network?, or is it a new station setup within a network?). Use the down button and enter instrument height. You measure this using the reflector staff and holding it parallel with the station and up to the small hole (1 mm diameter) under the Leica name on the right side of the Total Station. Arrow down and enter station easting (we use 1000), station northing (we use 1000), and station elevation (we use 100). Record this information on your Survey Record Form. Make sure you are in meters, and if not, we will go through the sequence below.
5
    Press F4 to enter in the reference azimuth. Point the instrument at the backsight or reference azimuth and input the value. For example, 335.5 will set the reference azimuth and horizontal circle to 335.5°. All subsequent measurements will be made relative to that direction. Record Hz0 on the Survey Record Form. Press continue followed by F3, record.




6
       Now you are back at the main menu. Press F4, Data, to see what is in file. Scroll down with arrows to File, selct F6 to list files or F5 (search) to examine individual files. By using the F3 and F4 keys, you can scroll through the file history. Press Continue when finished.

7
      You should be back at the main menu. Press F3 (CONF) to system configuration. Press enter for user configuration. Press F4 (SET) if you need to change the language or units. Press F6 to list the selections and enter to select it. We use ENGLISH, Metre, 3 Dec., 360 °, 3 Dec., °C, mbar, Easting/Northing, Clockwise (+), and V-drive left. Press CONT when completed, and CONT to get back to main menu.


8
  (  or     We are going to set the user template. The first step is to set the recording mask. From the main menu press F3 (CONF). Press Continue. From here you can change the recording mask sequence(F2) or the display mask (F3). Both are set in the following sequence: Press F6 (LIST) to list the possibilites followed by the enter key to select and move to the next choice. When complete press CONT and set the other mask if desired.
9
   Now we are just about ready to shoot points. From Main Menu press F6 (MEAS). Enter the reflector height by pressing F4 (TARGET) and arrow down to Refl.Height and enter in the reflector height in meters. Any time the reflector height changes it must be changed in the Total Station and on the survey record form. Record height on the Survey Record Form. Press CONT to save this change and you will return to MEASURE MODE. For operation refer to chart E.

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