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SLOPE INDICATOR 56804199 Manual

El in-place inclinometer
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Inclinometer
Copyright ©2006 Durham Geo Slope Indicator. All Rights Reserved.
This equipment should be installed, maintained, and operated by technically qualified personnel. Any errors
or omissions in data, or the interpretation of data, are not the responsibility of Slope Indicator Company. The
information herein is subject to change without notification.
This document contains information that is proprietary to Slope Indicator company and is subject to return
upon request. It is transmitted for the sole purpose of aiding the transaction of business between Slope Indi-
cator Company and the recipient. All information, data, designs, and drawings contained herein are propri-
etary to and the property of Slope Indicator Company, and may not be reproduced or copied in any form, by
photocopy or any other means, including disclosure to outside parties, directly or indirectly, without permis-
sion in writing from Slope Indicator Company.
EL In-Place
56804199
SLOPE INDICATOR
12123 Harbour Reach Drive
Mukilteo, Washington, USA, 98275
Tel: 425-493-6200 Fax: 425-493-6250
E-mail: solutions@slope.com
Website: www.slopeindicator.com

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Summary of Contents for SLOPE INDICATOR 56804199

  • Page 1 Company and the recipient. All information, data, designs, and drawings contained herein are propri- etary to and the property of Slope Indicator Company, and may not be reproduced or copied in any form, by photocopy or any other means, including disclosure to outside parties, directly or indirectly, without permis- sion in writing from Slope Indicator Company.

  • Page 2: Table Of Contents

    Contents Introduction..... . . 1 Pre-Assembly ..... 5 Vertical Installation .

  • Page 3: Introduction

    Introduction In-Place The in-place inclinometer system consists of Fixed wheel Inclinometers inclinometer casing and a string of linked points at in-place inclinometer sensors. direction of movement The inclinometer casing provides access for sub- in vertical installations surface measurements, controls the orientation of the sensors, and moves with the surrounding ground.
  • Page 4 IPI Sensor Components IPI sensor with wheel assembly and top and bottom tubing clamps. Each sensor has a serial number and is sup- plied with a specified length of signal cable. Fixed wheel is important at installation time. Tubing clamp connects sensor to gauge tubing Gauge tubing completes the gauge length of the sensor...
  • Page 5 Other Components Placement Kit includes Suspension Kit includes wheel wheel assembly and top assembly and hardware to clamp clamp. Clamp rests on top of and adjust suspension cable. casing and hold placement tubing in center of casing. Suspension kit is used with vertical inclinometers.
  • Page 6 Gauge Tubing Gauge tubing is typically ordered with the sensors. If gauge tubing is not supplied, check project specifications for required gauge length, and then follow the instructions below: Choose stainless tubing that can accept tubing clamps. The standard tubing clamps have a minimum OD of 15.6 mm (0.615 inch) and expand to a maximum OD of 17.4 mm (0.685 inch).

  • Page 7: Pre-Assembly

    Pre-Assembly Introduction This chapter tells how to connect gauge tubing to the sensors. We do not recommend further pre-assembly. Sensors should be joined to other sensors only as they are installed downhole. • Tools Vice-grips to hold gauge tubing. • Wrench to tighten tubing clamps.

  • Page 8: Vertical Installation

    Vertical Installation Overview 1. Lay out sensors in order of installation. 2. Insert the first sensor in the preferred set of grooves. The fixed wheel should point toward the expected direction of movement. 3. Lower the sensor into the casing. Keep the top of the gauge tube accessible.
  • Page 9 Install the 1. Attach safety line (nylon or wire rope) to Bottom Sensor bottom sensor. Secure the safety line. 2. Insert first (bottom) sensor in preferred set Fixed Swivel of grooves. The fixed wheel should point to Wheel Clamp the expected direction of movement. Check that the wheel has a swivel clamp.
  • Page 10 Install Next Sensor Connect next sensor to the gauge tubing of the sensor below, as shown in the drawing. Continue adding sensors until the sensor string is com- plete. Keep the following points in mind: • Do not allow the installed sensor to twist in the casing when you tighten the connection.
  • Page 11 Install Top Wheel Attach top wheel from suspension kit or placement kit. • Suspension kit: Wheel supplied in suspension kit has an eyelet for suspension cable. Connect suspension cable as shown in drawing. • Placement kit: Wheel supplied in placement kit has tubing clamp. Attach placement tubing as shown in the drawing.
  • Page 12 Terminate The suspension kit is used with vertical with Suspension Kit installations. It consists of a top wheel assembly, shown on the previous page, cable thimbles, cable clamps, and a hook for the top of the casing. 1. Cut the suspension cable to the appro-priate length.

  • Page 13: Horizontal Installation

    Horizontal Installation Overview 1. Lay out sensors in order of installation. 2. Align the first sensor with the vertical grooves of the casing. Insert the sensor with its fixed wheel pointing downwards. 3. Push the sensor into the casing. Keep the top end of its gauge tubing accessible.
  • Page 14 Install the 1. Check that the first sensor has a swivel clamp on its wheel assembly. First Sensor 2. Tape signal cable to the gauge tubing. 3. Align the fixed wheel with the bottom groove and push the sensor into the casing. Swivel Clamp Fixed Wheel Install More Sensors...
  • Page 15 Terminating the The placement kit supplies most of the components used to terminate Installation horizontal installations. The placement kit includes a top wheel assem- bly and a top clamp. A top clamp retainer is also available. Install Top Wheel The top wheel com- pletes the gauge length of the nearest sensor.

  • Page 16: Manual Reading

    Manual Readings Introduction Manual readings are useful for testing the system before the data acqui- sition system is set up. This manual covers connections to IPI sensors that have a 2.5v signal conditioner. Previous signal conditioners used a 250 mV signal conditioner with different wiring. EL Data Recorder 1.
  • Page 17 Test Readings 1. When the sensor body is vertical, you should see a reading of about 0.0 Vdc. 2. The A-axis sensor measures tilt in the plane of the wheels. Tilt the top of the sensor in the direction of the fixed wheel. The reading should be about 2.2 to 2.3 V as the tilt nears 10 degrees.

  • Page 18: Datalogging

    IPIs with the Campbell Scientific CR10X datalogger system. A sample CR10X monitoring program is available at Sample Program: Slope Indicator’s website. Go to www.slopeindicator.com - support - tech notes. Look at the data logger technotes. You’ll see a link for sam- ple programs.
  • Page 19 Wiring Diagram 3 Connecting uniaxial sensors to an AM416 multiplexer Wiring Diagram 4 Connecting biaxial sensors to an AM416 multiplexer EL In-Place Inclinometer, 2008/7/09...

  • Page 20: Data Reduction

    Data Reduction Introduction Data reduction is usually automated because it involves a large number of readings and a large number of calculations. Here, we explain how to use the sensor calibration record and provide an example of converting a single reading from voltage to mm of devia- tion and mm of displacement.
  • Page 21 Applying Suppose you obtain a reading of 0.57V from sensor 10001, which has a Calibration Factors gauge length of 2 meters. How do you convert the voltage reading to mm of deviation? Converting Apply the C factors to the voltage reading as shown below. EL repre- sensor readings sents a reading in volts.
  • Page 22 Direction of Inclinometer casing is typically installed so that one set of grooves is Movement parallel with the expected direction of movement. Sensors are installed for Vertical IPIs so that their fixed wheels point to the direction of movement. When the bottom of the casing or the bottom of the sensor is used as reference, positive displacement values indicate movement in the direc- tion of the fixed wheels (normally the expected direction).
  • Page 23 Direction of Horizontal inclinometer casing must be installed with one set of Movement grooves oriented to the vertical. Sensors are installed with the fixed Horizontal Sensor wheel pointing down. Far-End Reference When the far end of the casing or the far end of the sensor is used as the reference, negative displacements indicate upward movement and posi- tive displacements indicate downward movement: A negative displacement...
  • Page 24 Temperature The CR10 delivers thermistor readings in volts. The equation below Readings shows how to convert the volt reading to degrees C. The factors in the equation are optimized for temperatures between -15 and 85 degrees C. ET is the volt reading. Toffset is taken from the sensor calibration sheet. DegC = ( 9.3219 x ET ) + ( -54.3038 x ET ) + ( 131.165 x ET...

  • Page 25: Removing Sensors

    Removing Sensors Removal of Sensors If it is necessary to remove sensors, take the following precautions: • Never try to remove the assembled string of sensors. The weight and leverage of long gauge lengths make it very easy to damage the wheels.