Geosense IPI-V-1 Bedienungsanleitung
V1.0 September 2017
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MEMS Digital
Vertical In-Place Inclinometer
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CONTENTS PAGE
1.0 INTRODUCTION 3
1.1 General Description 3
1.2 Theory of operation 5
1.3 Measurement of tilt 6
2.0 CONFORMITY 7
3.0 MARKINGS 8
4.0 DELIVERY 9
4.1 Packaging 9
4.2 Handling 9
4.3 Inspection 9
4.4 Storage 10
5.0 INSTALLATION 11
5.1 Preparation for installation 11
5.2 System components - extension rod 13
5.3 Installation with extension rods 14
5.4 System components - wire rope 23
5.5 Installation with wire rope 24
5.6 Wiring 31
5.6.1 Colour coding 31
5.6.2 RS-485 to RS-232 Interface 31
5.6.3 WI-SOS 480 Digital Node 32
5.6.4 Windows tablet 33
6.0 DATA HANDLING 34
6.1 Taking readings 34
6.2 Data reduction 37
6.3 Calibration certificate 39
6.4 Temperature considerations 40
7.0 MAINTENANCE 41
8.0 TROUBLESHOOTING 41
9.0 SPECIFICATION 43
10.0 SPARE PARTS 43
11.0 RETURN OF GOODS 44
12.0 LIMITED WARRANTY 45
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It is VITAL that personnel responsible for the
installation and use of the In-Place Inclinometers
READ and UNDERSTAND the manual, prior to
working with the equipment.
1.1 General Description
The Geosense® In-Place Inclinometer (IPI) equipment is an environmentally sealed
assembly that is used to register changes of inclination within specialist inclinometer
casing. The assemblies are commonly interlinked and intended to remain static
within the inclinometer casing.
In-Place Inclinometers can be installed or included in many types of monitoring
regime and can be linked to various types of readout and recording equipment.
The primary uses of IPI’s are :-
Measurement of Rotation within a vertical installation.
Measurement of Rotation within an inclined or horizontal installation.
With applications such as, but not limited to, the following :-
Embankment stability and safety monitoring
Stability of retaining walls
Dam monitoring
Horizontal pile testing
Slope stability monitoring
Particular features of Geosense® IPI’s are:-
Reliable long term performance.
Ruggedness; suitable for demanding environments.
Simple, cable free interconnection.
High accuracy.
Digital output, therefore insensitive to long cable lengths and joints
The Geosense® IPI is based upon Micro Electro Mechanical Systems technology
(MEMS). The MEMS sensors employed in the IPI is an accelerometer that is
configured to measure changes in rotation (tilt or inclination). IPI sensor modules an
be configured to include a Uni-axial sensor or a Bi-axial sensor, where the two
sensors detect inclination in perpendicular directions (A axis and B axis).
Electronic circuitry within each IPI module interrogates its sensor and the
corresponding output is converted from an Analogue to a Digital signal, making it
(Continued on page 4)
1.0 INTRODUCTION
This manual is intended for all users of In-Place Inclinometers manufactured by
Geosense® and provides information on their principle, installation, operation and
maintenance.
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particularly suitable for the demanding environments of geotechnical and civil
engineering applications. Digital signals are capable of long transmission distances
without degradation.
Each Geosense® IPI has a unique identification number, thereby simplifying the
interconnection using 4 wire digital protocols.
Geosense® IPI’s are supplied in various configurations to suit a range of installations.
In most applications they are installed in ’strings’ where each IPI is connected to its
neighbour by a ’Universal joint’.
Each IPI comprises the following elements:
(Continued from page 3)
1.) Top hanger - used to suspend the complete IPI string
2.) Wire hanger extension - used to position the first IPI
3.) Top fly lead assembly - top suspension adaptor and cable connector
4.) In-Place Inclinometer probe - measures tilt in uniaxial or biaxial axes
5.) Extension rod - used to connect each IPI together
6.) Bottom wheel/termination assembly - base reference wheel & RS-485 end
termination
7.) Support rope - used to support the IPI string from the base
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1.2 Theory of Operation
inclinometer casing is a specially machined plastic tube that is installed in, or
fixed to, a structure. The tube has 4 equally spaced, parallel ‘keyways’ in its
inner surface, into which wheeled probes can be inserted, thereby maintaining
their orientation. The inclinometer casing is designed to move with the
structure into which, or onto which, it is fixed, if the structure changes shape.
In order to detect any changes in the horizontal direction (vertical or inclined
access tubes) or vertical direction (horizontal access tubes), an inclinometer
systems is inserted into the inclinometer casing.
An inclinometer system comprises a wheeled probe that runs in the
inclinometer casing keyways and includes very sensitive electronic tiltmeter(s),
a connecting cable and a readout.
Portable inclinometer systems are commonly used where monitoring is to be in
-frequent or manual monitoring is in-expensive. These systems are used to
determine the inclination of an inclinometer casing at 0.5m intervals along it
length. This information is processed to generate a profile of the inclinometer
casing, with respect to vertical and sequential profiles being compared with
each other to detect changes.
Geosense® In-Place Inclinometers (IPI’s) are intended to remain ‘in-place’
within the inclinometer casing and are employed where continuous or frequent
monitoring is required. The completed installation is, in effect, a string of
interconnected, inclinometer probes, separated by rods or wires and
suspended in the inclinometer casing.
Each Geosense® IPI sensor module includes a very sensitive Micro Electro-
Mechanical System (MEMS) tiltmeter. The device is extremely sensitive and is
detects changes in the angle of the module, if the surrounding inclinometer
casing moves. Installations close to vertical can measure movements in 2
directions, whereas
Since they are digital, the cable from the IPI modules can be connected
together in a ‘string’, thereby minimising the cables from each installation.
In most cases, Geosense® IPI’s are mechanically inter-connected using
‘Universal joints’ so as to maintain a physically connected profile of
measurement. This is critical if a ‘truly accurate’ profile of the inclinometer
casing is to be measured. (Where steel rope is used to interconnect the IPI
modules, a true profile cannot be measured).
In addition, it is vital that the IPI modules are suspended between the walls of
the inclinometer casing and do not touch them at any time during the
monitoring period.
Once installed and suspended in the inclinometer casing, the IPI sensors can
be interrogated by various means. The readings from each module will be the
angle of the sensors, with respect to vertical, in either degrees or ‘sine of the
angle’ units and the temperature of the module.
(Continued on page 6)
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The A axis is the primary axis and the B axis is the secondary axis. Uni-axial IPI
sensors only detect changes in the A axis.
After their installation, the vertical profile of the inclinometer casing is established
from the readings of individual IPI sensors. Changes to the verticality of a vertical or
inclined inclinometer casing (changes in the horizontal plane) are detected by the
sensor and the magnitude of the change is simply computed from the equation
‘current reading - initial reading’. Horizontal IPI’s detect vertical movement of the
inclinometer casing.
(Continued from page 5)
1.3 The measurement of tilt
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2.0 CONFORMITY
Geosense Ltd
Nova House
Rougham Industrial Estate
Rougham, Bury St Edmunds
IP30 9ND
Email: info@geosense.co.uk
Web: www.geosense.co.uk.
Declaration of Conformity
We Geosense® Ltd at above address declare under our sole responsibility that the Geosense® products
detailed below to which this declaration relates complies with protection requirements of the following
harmonized EU Directives:-
The Electromagnetic Compatibility Directive 2014/30/EU
Restriction on the use of certain Hazardous Substances RoHS2 2011/65/EU
Equipment description MEMS Digital IPI
Make/Brand Geosense
Model Numbers IPI-V-1, IPI-V-2, IPI-I-1, IPI-I-2, IPI-H-1, IPI-H-2
Compliance has been assessed with reference to the following harmonised standard:
EN 61326-1:2013Electrical equipment for measurement, control and laboratory use.
EMC requirements. General requirements.
EN 61010 (2010) Safety requirements for electrical equipment for measurement, control, and laboratory
use. General requirements.
A technical file for this equipment is retained at the above address.
Martin Clegg
Director
September 2017
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3.0 MARKINGS
A Geosense® Digital MEMS In-place Inclinometer systems are labelled with the following
information:-
Manufacturers telephone number & website address
Product group: MEMS Inclinometer system
Product type: MEMS In-place inclinometer system
Model: IPI-V-1, IPI-V-2, IPI-I-1, IPI-I-2, IPI-H-1, IPI-H-2
Range: +/- 15º
Orientation: Uni-axial or biaxial
Input supply: 8-15 Volts DC
Output signal: RS-485
Serial number: XXXXXX
CE mark
WEEE mark
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4.3 Inspection / functionality check readings
It is important to check all the equipment in the shipment as soon as possible after
taking delivery and well before installation is to be carried out. Check that all the
components detailed on the documents are included in the shipment. Check that the
equipment has not been physically damaged.
ALL Geosense® IPI’s carry a unique identification serial number which is included on
the labels on the IPI body
(see right). All IPI’s are
supplied with individual
calibration sheets that
include their serial
numbers and these are
shipped with the
equipment.
Wherever possible, it is suggested that the IPI’s should be functionally checked soon
after arrival to ensure they have not been damaged during transportation. This is a
basic ‘out of the box’ functional check. Ensure that the IPI’s have been stored in a
reasonably stable temperature for at least 60 minutes prior to carrying out a functional
check. To carry out the check, follow the steps detailed in Section 6 of this manual.
(Continued on page 10)
4.0 DELIVERY
This section should be read by all users of IPI’s manufactured by Geosense® .
4.2 Handling
Whilst they are a robust devices, Geosense® IPI’s are precision measuring
instruments. They, and their associated equipment, should always be handled with
care during transportation, storage and installation.
Once the shipment has been inspected (see below), it is recommended that IPI’s
remain in their original packaging for storage or onward transportation.
Cable should also be handled with care. Do not allow it to be damaged by sharp
edges, rocks for example, and do not exert force on the cable as this may damage
the internal conductors and could render an installation useless.
4.1 Packaging
Geosense® IPI’s are packed for transportation to site. Packaging is suitably robust to
allow normal handling by transportation companies. Inappropriate handling
techniques may cause damage to the packaging and the enclosed equipment. The
packaging should be carefully inspected upon delivery and any damage MUST be
reported to both the transportation company and Geosense®.
In-Place Inclinometer
IPI-V-2
± 15°
000001
TILT SENSOR
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4.4 Storage
All equipment should be stored in an environment that is protected from direct
sunlight. It is recommended that cables be stored in a dry environment to prevent
moisture migrating along inside them in the event of prolonged submersion of
exposed conductors.
Storage areas should be free from rodents as they have been known to damage
connecting cables.
No other special requirements are needed for medium or long-term storage although
temperature limits should be considered when storing or transporting associated
components, such as readout equipment.
(Continued from page 9)
Calibration Sheets contain VITAL information about the IPI’s
We suggest that only COPIES of calibration certificates should
be taken to site
The original certificates should be stored safely
Dieses Handbuch passt für folgende Modelle
5
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