Geosense HLC 6000 Series Manuel utilisateur
V1.0 July 2020
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HLC 6000 SERIES
HYDRAULIC ANCHOR LOAD CELLS
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CONTENTS
PAGE
1.0 INTRODUCTION
1.1 General description 3
1.2 Theory of operation 4
2.0 CONFORMITY 5
3.0 MARKINGS 6
4.0 DELIVERY 7
4.1 Packaging 7
4.2 Handling 7
4.3 Inspection/functionality 7
4.3.1 VW transducer 7
4.3.2 Pressure gauge/manometer 7
4.4 Storage 7
5.0 INSTALLATION
5.1 General issues 8
5.2 General considerations 8
5.3 Mounting surfaces 8
5.4 Installation 10
6.0 DATA HANDLING 13
6.1 Monitoring the load cell readings 13
6.2 Portable readouts 13
6.3 Data reduction 14
6.3.1 Overview 16
6.4 Load calculation 16
6.5 Calibration 17
6.6 Temperature considerations 19
7.0 MAINTENANCE 20
8.0 TROUBLESHOOTING 20
9.0 SPECIFICATION 23
10.0 SPARE PARTS 23
11.0 RETURN OF GOODS 24
12.0 LIMITED WARRANTY 25
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It is VITAL that personnel responsible for the installation and
use of the Geosense® Hydraulic Load Cells READS and
UNDERSTANDS the manual, prior to working with the
equipment.
1.1 General Description
The primary uses for the Geosense® HLC-6000 Series Hydraulic Anchor Load
Cells are used for measuring loads acting on:-
• Ground Anchors
• Rock bolts
• Tie backs
Particular features of the Geosense® HLC-6000 Series Hydraulic Anchor Load
Cells are:-
• Robust stainless steel construction
• Accommodates some eccentric loading
• Reliable long term performance
• Rugged, suitable for demanding environments
• High accuracy
• Data logger compatible
They consist of a sensitive pressure pad formed by joining two stiff steel discs at their
periphery. The void inside the cell is filled with de-aired fluid. When load is applied to the
cell the pressure of the inside liquid changes. The changes in pressure correspond
directly to the load applied.
Manufactured with a centre hole to accommodate anchors, rock bolts and tendons.
The pressure in the loads cell is measured either by a manometer or a vibrating wire
transducer (VWDT-5000) which are available in the following models:
HLC-6000 - Manometer (scale in bar for pressure indication)
HLC-6500 - Vibrating wire transducer
1.2 Theory of operation
HLC-6000 Series Hydraulic Anchor Load Cells consist of a sensitive pressure pad.
The void inside the cell is filled with de-aired fluid. When load is applied to the cell the
pressure of the inside liquid changes. The changes in pressure correspond directly to the
load applied.
The pressure inside the loads cell is measured either by a vibrating wire transducer or a
1.0 INTRODUCTION
This manual is intended for all users of Geosense® HLC-6000 series load cells
manufactured by Geosense and provides information on their installation, operation and
maintenance.
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2.0 CONFORMITY
Geosense Ltd
Nova House
Rougham Industrial Estate
Rougham, Bury St Edmunds
Suffolk , IP30 9ND
United Kingdom
Tel: +44 (0)1359 270457
www.geosense.co.uk
Declaration of Conformity
We Geosense Ltd at the above address declare that the equipment detailed below complies with the
requirements of the following EU Directive:-
The Electromagnetic Compatibility Directive 2014/30/EU
Restriction on the use of certain Hazardous Substances RoHS2 2017/2102/EU
Waste electrical & electronic equipment WEEE 2012/19/EU
Equipment description: Hydraulic load cells
Make/brand: Geosense
Model numbers: HLC-6000, HLC-6500
Compliance has been assessed with reference to the following harmonised standard:-
EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use.
EMC requirements. General requirements.
EN 61010-2-032:2002
Safety requirements for electrical equipment for measurement, control, and laboratory use.
A technical file for this equipment is retained at the above address
Martin Clegg
Director
Rougham, July 2020
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3.0 MARKINGS
Geosense HLC-6000 Series Hydraulic Anchor Load Cells are labelled with the following information:-
Manufacturers name & address
Product
Type/Model
Range
Serial number
CE mark
WEEE mark
HLC-6000 with Manometer
HLC-6500 with VW Transducer
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4.0 DELIVERY
This section should be read by all users of the HLC-6000 Series Hydraulic Anchor
Load Cells manufactured by Geosense.
4.2 Handling
Whilst they are a robust devices, HLC-6000 Series Hydraulic Anchor Load Cells are
precision measuring devices. They and their associated equipment should always be
handled with care during transportation, storage and installation.
Once the shipment has been checked it is recommended that Geosense® Vibrating wire
load cells remain in their original packaging for storage or transportation.
Cable should 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 my damage the interim
conductors and render the installation useless.
4.1 Packaging
HLC-6000 Series Hydraulic Anchor Load Cells 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®
4.3 Inspection/functionality
It is vital 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 HLC-6000 Series Hydraulic Anchor Load Cells carry a unique identification serial
number which is located on the cable connection block.
All HLC-6000 Series Hydraulic Anchor Load Cells are supplied with individual
calibration sheets that include their serial numbers and these will shipped with them.
Calibration Sheets contain VITAL information about the Geosense®
Vibrating wire load cells. They MUST be stored in a safe place.
Only copies should be taken to site.
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4.3 Inspection/functionality contd...
4.3.1 Vibrating wire transducer
CHECK the VW transducer readings against the factory ‘Zero Readings’ on arrival to
ensure they have not changed significantly due to damage during transportation. This is a
basic ‘out of the box’ functional check.
Prior to carrying out a reading check, ensure that the load cells have been stored in a
reasonably stable temperature for at least 30 – 60 minutes.
To carry out the check, connect a Vibrating Wire readout to the bare cable ends (Red
connector to Red wire and Black connector to Black wire) – The Green and White
connectors / wires are for the temperature sensor and are not
required for this checking exercise - see the readout manual
for connection guidance.
Record the values (and units) displayed on the readout together
with the load cell serial numbers.
The “CHECK” readings should coincide with the factory zero on
the calibration sheet (see the example calibration sheet in
Section 9) within +/- 50 digits after barometric and temperature
corrections are made.
The elevation of the Geosense® factory is +60 metres above sea level and barometric
pressures change with altitude by approximately 1.2kPa per 100 metres.
4.3.2 Pressure gauge/manometer
Check the gauge offset is at zero
4.4 Storage
All HLC-6000 Series Hydraulic Anchor Load Cells and associated equipment should be
stored in an environment that is protected from direct sunlight.
It is also recommended that cables be stored in a dry environment to prevent moisture
migrating along inside them in the unlikely event of prolonged submersion of exposed
conductors. The cables should also be protected from rodents and traffic.
The ‘CHECK Readings WILL be affected by changes in
atmospheric pressure and temperature changes.
Calibration Sheets contain VITAL information.
They MUST be stored in a safe place.
Only COPIES of calibration certificates should be taken to site
The original certificates should be stored safely.
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V1.0 July 2020
It is VITAL that personnel responsible for the installation and use of the
Geosense® HLC-6000 Series Hydraulic Anchor Load Cells READS and
UNDERSTANDS the manual, prior to working with the equipment.
**********
As stated before, it is vital to check all the equipment in the shipment soon
after taking delivery and well before installation is to be carried out. Check
that all components that are detailed on the shipping documents are
included.
5.0 INSTALLATION
This section of the manual is intended for all users of HLC-6000 Series Hydraulic Anchor
Load Cells manufactured by Geosense® and is intended to provide guidance with
respect to their installation.
5.1 General Issues
• Note serial number against location
• Mark cables for future identification. Use an appropriate coding system and mark
cables at frequent intervals, not just at the ends.
• Protect the ends of the signal cable. Cables should be terminated at a waterproof
box or with waterproof connectors.
5.2 General considerations
Ensure that the internal diameter of the cell is correct for the anchor strands or bolt
head.
Ensure that the capacity of the cell is sufficient for the anchor including the
tensioning.
Provide support brackets where necessary to ensure the load cell is kept centralised
during installation.
5.3 Mounting surfaces
Mounting surfaces should be flat and parallel for optimum performance the
mounting surface MUST be flat and perpendicular toi the direction of loading
(anchor or rod). Very stiff abutment plates and load distribution plates is
recommended.
The abutment plate (provided locally) is normally made to suit specific site
requirements and the load distribution plate (supplied by Geosense) should be I
inserted between the load cell and the anchor head (see next page)
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5.3 Mounting surfaces contd…
Details shown below are for a typical installation but conditions may vary from site to site.
Before installing the following conditions should apply
The applied load must be perpendicular, centered, and uniform over the
Load Cell surface.
Avoid load concentrations.
Make sure loading surfaces are accurately levelled and parallel.
If necessary fabricate an anchor load bearing/abutment plate
anchor
load distribution
plates
cables /
strands
bearing plate
wedge plate
wedges
anchor load bearing / abutment plate
anchor load cell
centralising
supports
Ce manuel convient aux modèles suivants
2
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