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VW Jointmeter
Copyright ©2006 Slope Indicator Company. 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.
52632289
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 VW
- 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 Taking Readings ....8 Data Reduction....10 VW Jointmeter, 2006/6/15...
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Page 3: Introduction
Introduction Applications The VW Jointmeter is used to monitor movement at joints and cracks in concrete structures. Basic Configuration The jointmeter consists of one or more VW displacement sensors, brackets, and anchors. The drawing below shows a 3-D Jointmeter. Note that the exact configuration of the brackets will... -
Page 4: Installation
Attach Z-sensor to anchor, slide Z bracket over the sensor, and attach the bracket to its anchors. Attach X and Y brackets to their anchors. Install X and Y sensors. Adjust all sensors to starting position. Y Bracket Z Bracket X Bracket VW Jointmeter, 2006/6/15... - Page 5 325 mm or 12.75 inches from surface A Place XY Template Assemble template. Center hub on Z anchor. Place Y leg of template parallel to joint. Template hub centered on Z anchor location Y leg of template parallel with joint VW Jointmeter, 2006/6/15...
- Page 6 Location for Y anchors Drill Anchor Holes For each bracket, it may be useful to drill one hole first, insert the anchor, temporarily attach the bracket, and then use remain- ing holes in the bracket to place other holes. VW Jointmeter, 2006/6/15...
- Page 7 Do not twist the sensor or the cable. Insert Z sensor’s leader rod through top of Z bracket. Then slide Z bracket over sensor and onto anchors on surface A. Leader rod is later removed. VW Jointmeter, 2006/6/15...
- Page 8 This distance is equivalent to the opening of the sensor. Sensor is in zero Sensor opened to position and will mid-range. It can now monitor vertical monitor vertical movement in only movement in both one direction. directions. Not recommended. VW Jointmeter, 2006/6/15...
- Page 9 This is not recommended. Sensor is now opened to mid-range. It can monitor both opening and closing of the joint. The length of the exposed rod is the range allowed for closing of the joint in the X axis. VW Jointmeter, 2006/6/15...
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Page 10: Taking Readings
These instructions tell how to read Vibrating Wire (VW) sensors with Slope Indicator’s portable readouts. Instructions for read- ing VW sensors with a Campbell Scientific loggers can be found in the support - technotes section of at www.slopeindicator.com. Reading with the... - Page 11 Read the RTD: Select °C with the Data key. Note that the VWP Indicator cannot read thermistors. Standard Jumper 52611950 Connect alligator clips as shown: Clips Wire Colors Function Orange White & Orange Black Black Blue White TEMP Black White & Blue Green TEMP VW Jointmeter, 2006/6/15...
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Page 12: Data Reduction
Positive values indicate opening of the joint. Negative val- ues indicate closing of the joint. Temperature We recommend that you record temperature. Temperature data can help you understand movement due to temperature changes. Currently, we do not apply a temperature correction to jointmeter readings. VW Jointmeter, 2006/6/15...
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