How to use the electronic theodolite

　　Theodolite structure machine parts

　　1. The structure of theodolite (main commonly used components):

　　Theodolite

　　1 Telescope brake screw

　　2 Telescope

　　3 Telescope fine-motion screw

　　4 Horizontal braking

　　5 Horizontal micro-screw

　　6-foot screw

　　9 Optical sight

　　10 objective lens focusing

　　11 Eyepiece focusing

　　12 degree dial reading microscope focus

　　13 Vertical plate indicator tube level micro screw

　　14 Optical plummet

　　15 Base circular level

　　16 Instrument base

　　17 Vertical dial

　　18 Vertical dial lighting mirror

　　19 Sighting tube level

　　20 Horizontal disc position change hand wheel

　　The telescope is fixedly connected to the vertical plate and installed on the bracket of the instrument. This part is called the collimator of the instrument and belongs to the upper part of the instrument. The telescope and the vertical plate can rotate around the horizontal axis in the vertical plane. The collimator axis of the telescope should be orthogonal to the horizontal axis, and the horizontal axis should pass through the center of the water plate. The numerical axis of the collimator (the rotation axis of the collimator) is inserted into the shaft sleeve of the instrument base, and the collimator can rotate horizontally.

　　The editor will introduce how to use it.

　　Instructions:

　　Place the electronic theodolite on a stand, such as a chair or a camera tripod, so that the line of sight can be easily observed through the screw ring of D. Place the theodolite facing south, first do not raise the sight arm D (that is, the latitude table E points to zero), adjust the inclination of the B plate, so that the line of sight can see the horizon along the sight arm, and fix the B plate in this position. At this time, the B plate remains horizontal. Now rotate C and D to observe the celestial body, and E will indicate the horizontal latitude of the celestial body.

　　Operating procedures:

　　1. Electronic theodolite installation equipment:

　　Place the theodolite on the tripod head, make the tripod head roughly horizontal, and tighten the connecting screws.

　　2. Alignment:

　　The purpose is to make the center of the instrument and the measuring station on the same plumb line. The tripod can be moved and the foot screw can be rotated to make the center mark accurately align with the center of the measuring station.

　　3. Leveling:

　　The purpose of an electronic theodolite is to make the vertical axis of the instrument plumb and the level disk horizontal. According to the definition of the horizontal angle, it is the projection of the angle between two direction lines on the horizontal plane, so the level disk must be horizontal.

　　Rough leveling: Extend and retract the tripod legs to center the circular level bubble.

　　Check and accurately align: Check whether the centering mark deviates from the ground point. If it deviates, loosen the connecting screw on the tripod, translate the instrument base so that the centering mark is accurately aligned with the center of the measuring station, and tighten the connecting screw.

　　Precision leveling of theodolite: Rotate the foot screw to center the bubble of the level.

　　4. Electronic theodolite aiming and reading:

　　① Eyepiece alignment: Focus the eyepiece to make the crosshairs clear.

　　② Aiming and aligning the objective lens: aim at the target roughly and adjust the objective lens to make the target clear. Pay attention to eliminating parallax. Aim at the target precisely.

　　③ Reading:

　　Adjust the lighting reflector to make the reading window moderately bright, rotate the eyepiece of the reading microscope to make the scribed lines clear, and then read the reading.