Topcon OS Series Resection Setup Quick Manual

Total station and magnet field

TOPCON OS SERIES TOTAL STATION AND MAGNET FIELD

OS Series Resection Setup Quick Guide

This Quick Guide is to show you how to setup and orientate the Topcon OS Series Total

Station using the Resection Method.

Resection

Principles of a

Resection is used to determine the coordinates of an instrument position (station point) by

performing multiple measurements of points whose coordinate values are known.

We need a minimum of two known points to perform a

resection, but the more points that are known and

used, the higher the precision of the calculated

instrument position. We would always recommend a

minimum of three known points to be used.

In this diagram you can see the Instrument is setup at

P0 and we have known points at positions P1 to P4.

We are going to use P1, P2 and P3 for our resection.

It is important to make sure that the battery is seated in the instrument prior to setting

the Total Station up as the weight of the battery will affect the level of the instrument.

Step One: Positioning the Instrument

1) Locate a position where you can observe at least two known

control points.

Make sure the Tripod legs are spaced at equal intervals and the

Tripod head is roughly level.

Make sure the Tripod feet are firmly fixed in the ground.

Tip: Set the height of the Tripod head at mid chest height to

ensure the telescope of the instrument is at eyelevel.

2) Place the Instrument on the Tripod head.

Supporting it with one hand, tighten the centring screw on the

bottom of the unit to make sure it is secured to the Tripod.

Table of Contents

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

Page 1 TOPCON OS SERIES TOTAL STATION AND MAGNET FIELD OS Series Resection Setup Quick Guide This Quick Guide is to show you how to setup and orientate the Topcon OS Series Total Station using the Resection Method. Resection Principles of a Resection is used to determine the coordinates of an instrument position (station point) by performing multiple measurements of points whose coordinate values are known.
Page 2 Turn the levelling foot screws while checking the circular level until the bubble is centred in the centre circle. 2) Turn on the OS Series using the Power Button. The “Virtual Bubble” is shown on the screen. “” indicates the bubble in the circular level.
Page 3 Resection Setup using MAGNET Field on the Topcon OS 1) From the MAGNET Field home screen, select [Setup] Option. 2) From the Setup options select the [Resection] icon. 3) Define Instrument Setup: We need to enter a unique ID for the point the Total Station is setup on.
Page 4 5) MAGNET Field will now ask you to specify another control point, in this case P2. As before you can select from the map, list or manually enter. Don’t forget to enter your pole height! Tap the “Measure” Icon 6) MAGNET Field will now take you to the results screen which will show you the residuals from your initial two measurements.