Report Lab#4 584w3p

Yarmouk University Hijjawi Faculty for Engineering Technology Civil Engineering Department Surveying Lab Section #4 Dr. Madhar M. Taamneh Instructor: Eng. Bayan Al Omari

Experiment #4: Digital Theodolite set up & Horizontal Angle measurement. Fadi Basem Dawoud Ismail 2012888165

Group #3 Abstract: In this experiment we’ll learn how to use the digital Theodolite and to know the basics about it. Also how to read and measured the horizontal angles using the digital Theodolite. Introduction: There are three types for measuring the angels: 1- Degree 2- Gradian (GON) 3- Radian. We’ll use the Gradian measurement in this experiment. Also there are two types of angles: 1- Vertical Angle 2- Horizontal Angle. Including: Azmith & Reduced. We are going to use the Azmith method for (Horizontal Angle).   Device Information: The Digital Theodolite - Electronic Series, offers state-of-the-art technology at an affordable price. Our Theodolite - Electronic Series come with newly-designed double LCD displays, as well as numeric & alphabetic keypad, and are ideal for the measurement of horizontal and vertical angles, used in

surveying. It consists of a small telescope mounted so as to move on two graduated circles, one horizontal and the other vertical, while its axes through the centre of the circles.

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Telescope: 30x Image: Erect Field of view: 1°30' Accuracy: 1" Minimum reading: 1"/5" Double LCD Vertical Compensation Laser Plummet EDM interface: RS232C Data output: RS232C Angle Measurement: Gradian (GON) Battery capacity: 20h

Method:   Design : The equations we will use in this experiment are: 1- ∑ of angles of any Closed polygon shape=( n−2 ) (180) 2- Acceptable Error=1 ' ' √ N , (N = #of angles)

3-

180 °=200 gon

  Group & Tasks: 1-Shatha (Group Leader) 2-Fadi 3-Rawan 4-Ahmad 5-Hanen 6-Mahmoud Leveling & Centering the device: All the . Take the reading from the device: All the . Recording the readings: Rawan.  Apparatus and Materials: 1. Digital Theodolite. 2. Ranging Poles. 3. Tripod.

  Procedures: At the beginning, we determine three points randomly at the field to create a triangle, and then two points of them are marked by the ranging poles, and the other point we put the Digital Theodolite on it. After that we start to make centering and leveling for the Digital Theodolite. Then we turn on the device and put it toward the first point to see the ranging pole from the lens, then we click on (oset) at the device to reset the readings, then we start rotating the device toward the second point (to the right) and when we see the ranging pole from the lens we fastened the device from moving and take the reading from the screen, then we turn off the device and moving it to the other point and doing all

that steps, for all the points. After doing that we’ll calculate the summation for the angles and determine the error (by subtract 200 (gon) from our readings (the summation (gon))) and doing the suitable correction.

Results & Correction:

Discussion and Error:

The Digital Theodolite is a very sensitive device that we should be careful while using it. So we can avoid errors and mistakes. Errors that we faced: 1-Error in leveling and centering the Theodolite. 2-Moving the Theodolite can affect at the readings. 3-Error while taking the readings.

Suggestions for a successful experiment: 1-Adjust the Digital Theodolite perfectly. 2-Trying not to move the device from its place while reading at the same point. 3-Taking readings from the device more than once.

References: http://www.worldoftest.com/electronictheodol ite.htm