Mems Tiltmeter (IPI Sensor Based) User Manual Man193 2.0.2 07/08/2014 Final Chris Rasmussen Phil Day Manual No.
Contents Section 1 : Introduction ................................................................................................................3 Section 2 : Installation .................................................................................................................4 2.01 2.02 2.03 Identify Components and Tools Needed ................................................................................... 4 Drill Anchor Hole ...................................................................
Section 1 : Introduction The Soil Instruments Mems Tiltmeter is based on the Soil Instruments In Place Inclinometer (IPI) sensor. It is designed for attaching to structures where a larger tilt range (in arc degrees) is required than can be achieved with EL based sensors. The use of a MEMS sensor in the Tiltmeter gives a large range with high sensitivity and relative immunity from the effects of long cable runs. The sensor has on-board temperature compensation.
Section 2 : Installation The following tools are required for installation; 3mm & 5mm Allen keys A drill and bit suitable for drilling an M8 anchor hole Adjustable spanner Small flat blade screwdriver (for wiring) A selection on M8 nuts and washers The installation procedure is detailed below:- 2.
Section 3 : Wiring The Soil Instruments tiltmeter sensor can be read by most commercially available dataloggers. Soil Instruments recommend the Campbell datalogger range and can supply a fully built up datalogger with enclosure, logging program and a variety of communications options from a simple direct link to satellite modem, please see our datalogger datasheets.
Section 4 : Taking Readings/Logger Programming The Soil Instruments tiltmeter sensors are designed to be read by Campbell datalogger systems. Other dataloggers can be used, including the Campbell CR1000 loggers, but the basic reading and excitation architecture outlined in this section must be followed.
1: 78 Pulse Port 8 ; Activate SW12Volt 4: Do (P86) 1: 47 Set Port 7 High ; Let the sensors warm up for at least 3 seconds 5: Excitation with Delay (P22) 1: 3 Ex Channel 2: 0000 Delay W/Ex (0.01 sec units) 3: 300 Delay After Ex (0.
If in any doubt we recommend contacting Soil Instruments for advice. The performance of the sensors as calibrated is not guaranteed unless the above protocols are used. Soil Instruments can supply full logger programs and wiring diagrams at an extra cost, please contact us for details.
Section 5 : Data Reduction The Soil Instruments tiltmeter sensor is calibrated over ±5 or ±10 arc degrees (approx. ±87 or ±175mm/metre) and has a DC voltage output dependant on tilt. The sensors are calibrated for tilt only (please see note on temperature below) and the unit of calibration (either Arc Degrees or mm/metre) is specified at the time of order.
Section 6 : Sample Installation Record Sheet MEMS Tiltmeter Installation Sheet Location User Manual Date Installer Site Sensor Number Serial Number A+ Direction Notes 10
MEMS Tiltmeter (IPI Sensor Based) Section 7 : Sample Calibration Sheet Bell Lane, Uckfield, East Sussex t: +44 (0) 1825 765044 e: info@itmsoil.com TN22 1QL United Kingdom f: +44 (0) 1825 744398 w: www.itmsoil.com Soil Instruments Ltd. Registered in England. Number: 07960087.
