1. Manuals
  2. Brands
  3. ROCTEST Manuals
  4. Accessories
  5. PISA-M
  6. Instruction manual

ROCTEST PISA-M Instruction Manual

Mems vertical ipi serial sensors
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
I
M
NSTRUCTION
ANUAL
MEMS VERTICAL IPI SERIAL SENSORS
Model PISA-M
 Roctest Limited, 2016. All rights reserved.
This product should be installed and operated only by qualified personnel. Its misuse is potentially dangerous. The Company makes no warranty as to the information furnished
in this manual and assumes no liability for damages resulting from the installation or use of this product. The information herein is subject to change without notification.
Tel.: 1.450.465.1113 • 1.877.ROCTEST (Canada, USA) • 33.1.64.06.40.80 (France) • 41.91.610.1800 (Switzerland)
www.roctest.com
E10350-161101

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PISA-M and is the answer not in the manual?

Questions and answers

Summary of Contents for ROCTEST PISA-M

  • Page 1 The information herein is subject to change without notification. Tel.: 1.450.465.1113 • 1.877.ROCTEST (Canada, USA) • 33.1.64.06.40.80 (France) • 41.91.610.1800 (Switzerland) www.roctest.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION...................... 1 VERTICAL IN-PLACE INCLINOMETERS ............1 SENSOR COMPONENTS ................1 SERIAL SENSOR CABLE CONNECTIONS ............3 OTHER COMPONENTS ................... 4 SUSPENSION KITS ..................4 PREPARATION FOR INSTALLATION ..............5 CHECK SENSORS ................... 5 PREPARE SUSPENSION CABLE ..............5 ATTACH GAUGE TUBING ................
  • Page 3 WIRING DIAGRAM ..................13 LIMITATIONS ....................14...

  • Page 4: Introduction

    E10350-161101 1 INTRODUCTION 1.1 VERTICAL IN-PLACE INCLINOMETERS The in-place inclinometer system consists of the inclinometer casing and a string of in- place inclinometer sensors (please see Figure 2 on next page). The inclinometer casing provides access for subsurface measurements, controls the orientation of the sensors, and moves with the surrounding ground.
  • Page 5 E10350-161101 Figure 2 Figure 3 An individual sensor includes a sensor body, a gauge tube, a top wheel, and a bottom wheel. A string of linked sensors includes n sensor bodies, n gauge tubes, a top wheel, a bottom wheel, and n-1 middle wheels. Sensor bodies can contain uniaxial or biaxial sensors, both look the same.

  • Page 6: Serial Sensor Cable Connections

    E10350-161101 body and wheels. Top wheels have an eyelet for attaching a stainless steel suspension cable. They also have a socket for connecting to a gauge tube. Bottom wheels attach directly to the bottom of the sensor. They have no socket. Middle wheels are used to link sensors.

  • Page 7: Other Components

    E10350-161101 1.4 OTHER COMPONENTS Figure 5 1.5 SUSPENSION KITS Top suspension kit is used to suspend the IPI sensors from the top of the casing, as shown on Figure 6. Stainless steel cable is ordered separately. In-line suspension kit is used to suspend a string of deeper sensors from a string of shallower sensors.

  • Page 8: Preparation For Installation

    E10350-161101 Figure 6 2 PREPARATION FOR INSTALLATION 2.1 CHECK SENSORS 1. Check each sensor. 2. Identify the bottom sensor for each string. The bottom sensor will require a plug for the bottom connector. 3. Make a note of the serial number of each sensor and its intended depth of installation.

  • Page 9: Attach Gauge Tubing

    E10350-161101 3. Determine the distance between the top wheels and the top of the casing. Cut the stainless steel suspension cable to this length. 4. Connect suspension cable to top wheel as shown in Figure 7. 5. Connect suspension cable to the chain as shown in Figure 7. Figure 7 2.3 ATTACH GAUGE TUBING 1.

  • Page 10: Installation

    E10350-161101 3 INSTALLATION 3.1 INSTALLATION OVERVIEW 1. Lay out sensors in the order of installation. 2. Insert the first sensor into the preferred set of grooves. 3. Lower the sensor into the casing. Using the vise-grip, clamp the top of the gauge tube to hold the sensor while you connect the next sensor.

  • Page 11: Install Additional Sensors

    E10350-161101 Figure 9 3.4 INSTALL ADDITIONAL SENSORS 1. Connect next sensor to the gauge tubing of the sensor below. Always check that fixed wheel points to expected direction of movement, as shown on Figure 10 2. Check that connectors are clean, and then connect the cables. Secure excess cable to the gauge tubing with tape or a cable ties.

  • Page 12: Install The Top Wheel

    E10350-161101 3.5 INSTALL THE TOP WHEEL 1. Connect the data cable to top sensor. Cable runs from top sensor to data logger (see Figure 11). 2. Connect top wheel to gauge tube. Figure 11 3.6 SUSPEND THE SENSORS 1. Check that suspension cable is securely clamped. 2.

  • Page 13: Data Reduction

    E10350-161101 4 DATA REDUCTION 4.1 INTRODUCTION Data reduction is usually automated because it involves a large number of readings and a large number of calculations. In this section, we explain the sensor calibration sheet and provide an example of converting a single reading in volts to tilt in mm per meter and tilt in degrees. 4.2 CALIBRATION SHEET A calibration sheet is provided with each sensor.

  • Page 14: Calculating Tilt In Degrees

    E10350-161101 4.5 CALCULATING TILT IN DEGREES For example, Sensor 14384 gives an A-axis reading of 0.4137 V at 6.7°C. Then to convert the tilt in mm/m in degree, following formula must be applied. Tilt (degrees) = arcsin(Tilt /1000) mm/m With previous reading Tilt (degrees) = arcsin(38.1797/1000) Tilt = 2.188°...

  • Page 15: Connection To Dataloggers

    These instructions provide information needed for reading uniaxial and biaxial Pisa-M with the Campbell Scientific CR6 datalogger system. Wiring diagrams: The wiring diagram below shows how to connect serial Pisa-M to the Campbell Scientific CR6 datalogger. Uniaxial and biaxial connections are identical.
  • Page 16 E10350-161101 5.2 WIRING DIAGRAM Figure 15 Page 13...
  • Page 17 E10350-161101 5.3 LIMITATIONS The list below shows nominal limits for chain of serial sensors. The following table assumes that the logger supplies 12 volts: Cable Length of jumper cable Limit of sensors in the chain 40 m 50 sensors 92 m 40 sensors 165 m 30 sensors...

Table of Contents