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Instruction Manual
6850-7 / 6850-8
Manual Sighting and Reading Table
No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc.
The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility
for errors, omissions, or misinterpretation. The information herein is subject to change without notification.
Copyright © 2017 by Geokon, Inc.
(Doc Rev Initial, 11/28/2017)
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Table of Contents
Summary of Contents for Geokon 6850-7
- Page 1 Manual Sighting and Reading Table No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc. The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility for errors, omissions, or misinterpretation.
- Page 3 Upon examination by Geokon, if the unit is found to be defective, it will be repaired or replaced at no charge. However, the WARRANTY is VOID if the unit shows evidence of having been tampered with...
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Page 4: Table Of Contents
TABLE of CONTENTS 1. INTRODUCTION ..............................1 2. INSTALLATION ..............................1 3. MOUNTING ................................2 3.1 G ................................2 ENERAL 3.2 F .............................. 2 LOOR OUNTING 3.3 W ............................... 4 OUNTING 4. OPERATION ................................5 5. DATA REDUCTION FORMULAS FOR MANUAL SIGHTING AND READING TABLE ......7 FIGURES 1 - P .......... -
Page 5: Introduction
1. INTRODUCTION Models 6850-7 and 6850-8 Manual Sighting and Reading Tables is a manual measurement device for detecting and measuring the horizontal displacement, inside a dam embankment, of a pendulum wire relative to the station inside the dam embankment at which the sighting device is mounted. -
Page 6: Mounting
3. MOUNTING 3.1 General The Manual Sighting and Reading Table can be mounted in two ways: floor fixation or wall fixation. No matter in what way it is mounted, it must be ensured that directions X and Y correspond to the expected directions, Y being typically oriented directly Upstream/ Downstream. -
Page 7: Figure 2 - Key Dimensions Of Floor Mounting Bracket
Figure 2 - Key Dimensions of Floor Mounting Bracket Figure 3 - Schematic Drawing for Floor Mounting... -
Page 8: Wall Mounting
3.3 Wall Mounting When the distance from the perpendicular to the wall ranges between 100 mm and 400 mm, the wall fixation method can be used for mounting. Wall brackets can be provided by Geokon with the Manual Sighting and Reading Table. -
Page 9: Operation
4) The calculation of the X and Y coordinates is done by software loaded as an app onto an Android smart phone. The software can be downloaded off the Geokon website. Selecting the App brings up the screenshot shown in Figure 4. Using the touch screen, enter the values of A1 and A2 in millimeters and then touch the ‘calculate’... -
Page 10: Figure 6 - Showing The Collimation Process
Figure 6 - Showing the Collimation Process Figure 7 - Screen-Shot of the Android Software Output... -
Page 11: Data Reduction Formulas For Manual Sighting And Reading Table
5. DATA REDUCTION FORMULAS FOR MANUAL SIGHTING and READING TABLE An alternative way to calculate the X Y coordinates is to use the following equations: Step 1: Let ‘The scale reading B1(mm)’ = B1 ,‘The scale reading A1(mm)’=A1 Step2: Let θ=0.23539256 (rad) Step3: Define k 1 , k 2 , where: −...