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8

 

V1.0 July 2020

 

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) /

-

 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.

 

Содержание HLC 6000 Series

Страница 1: ...V1 0 July 2020 I N S T R U C T I O N M A N U A L HLC 6000 SERIES HYDRAULIC ANCHOR LOAD CELLS...

Страница 2: ...2 V1 0 July 2020...

Страница 3: ...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 Portabl...

Страница 4: ...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 pre...

Страница 5: ...se 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 65...

Страница 6: ...eosense 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 Manome...

Страница 7: ...obust 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 up...

Страница 8: ...th 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...

Страница 9: ...ng 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 cons...

Страница 10: ...y 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 fabricat...

Страница 11: ...plate STEP 2 Lower the Load Cell over the tensioning member s and onto the loading surface abutment plate TAKE A ZERO LOAD READING SEE DATA HANDLING FOR VW STEP 3 Lower the Distribution Plate over th...

Страница 12: ...4 Place the Wedge Plate over the tensioning member s and onto the load distribution plate and additional top load plate optional STEP 5 Slowly lower the tensioning jack over the tensioning member s 5...

Страница 13: ...tribution plate or top load plate where applicable STEP 7 Tension the strands as required and take readings from the VW transducer or manometer as necessary TAKE CARE NOT TO OVER RANGE THE LOAD CELL I...

Страница 14: ...a brief step by step procedure for use with the Geosense VWR 1 portable readout 1 Connect signal cable from the sensor to the readout following the wiring colour code Conductor colours may vary depen...

Страница 15: ...upplied with every Geosense Vibrating Wire Transducer If the readout displays Frequency values e g 2768 5 Hz only a simple calculation is re quired to convert the readings to Linear Digits Linear Digi...

Страница 16: ...cle Readings digit Readings from the transducer as pressure is applied and as pressure is reduced in steps The average is calculated Calculated Pressure Calculation of the applied pressure using the c...

Страница 17: ...17 V1 0 July 2020 6 5 CALIBRATION Vibrating Wire...

Страница 18: ...18 V1 0 July 2020 6 5 CALIBRATION contd Pressure gauge Manometer...

Страница 19: ...it is necessary to first establish the effects of the temperature changes on the load cell and the medium in on which it is installed A useful exercise to carry out on site to establish the in situ ef...

Страница 20: ...the system that cause elasticity in the system it is the release of the stored energy in the system whilst transferring load to the anchor and so at the same time through the load cell that cause this...

Страница 21: ...ilable ii Make sure that suitably thick distribution plates are being used so that load will be distributed to the load cell as a UDL Uniformly distributed load VW Load cell is giving unstable reading...

Страница 22: ...nly on very rare occasions will this be untrue In almost all cases a fluctuating reading is a sign of a faulty signal from the sensor The fault could be in either the sensor the connecting cable any s...

Страница 23: ...gh tensile stress relieved steel Output signal Manual Frequency Capacity kN Internal diameter mm Outside Diameter mm Load Cell Height mm Load distribution plate height mm 250 40 140 30 30 500 71 170 3...

Страница 24: ...s defects which arise as a result of a failure in design or manufacturing It is a condition of the warranty that the Geosense Geosense HLC 6000 Series load cells must be installed and used in accordan...

Страница 25: ...all be at the expense of the Purchaser Return shipment of repaired replaced part or parts covered by this warranty shall be at the expense of the Manufacturer Unauthorised alteration and or repair by...

Страница 26: ...26 V1 0 July 2020 VIBRATING WIRE ANCHOR LOAD CELLS HLC 6000 SERIES...

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