Load Cell

We are leaders in the market for providing best range of Vibrating Wire Centre Hole Load Cell

Vibrating Wire Centre Hole Load Cell

Applications

The measurement and control of load including:Load in rockbolts, tie backs, foundation anchors and tunnelsupportTension in cable anchors and multistrand tendon anchors

Operating Principle

Advantages

Accurate, robust and very good long term stabilityNegligible temperature effects compared with oil filled load cell

Fast response timeAccuracy unaffected by cable lengthSuitable for remote readingsCapable of reading eccentric loadsCommon readout for all vibrating wire type instruments

Installation

Tensile loads in rockbolts and cables are measured by installing CentreHole load Cells between the rock/concrete face and the tensioning nutof the bolt or anchor. For the most reliable results, a concrete bearingpad should be cast, with its upper face flat and perpendicular to thebolt or cable. A bearing plate is placed beneath the cell to spread theload and to take up any residual nonalignment. A further bearing plateis placed between the cell and anchor. The assembly is centralisedand held in place by applying a small tension to the bolt or cable. Faultin centralisation or alignment will be apparent from differences in loadreadings at each of the vibrating wire gauges in the cell. In situationswhere speed of installation is important, the bearing pad may beformed using high alumina cement or resin grout. Readings of thevibrating wires are averaged to obtain the bolt or cable tension. Inmulti-strand cable anchors, it is possible to tension the strandsuniformly, by monitoring and balancing the load reading for each of thevibrating wire gauges.

View Complete Details

Ask Latest Price & Details

Vibrating Wire Centre Hole Load Cell

Product Code:EKE 831 to EKE 836

Operating Principle

The vibrating wire load cell comprises a set of three or six vibratingwire gauges, mounted parallel to each other equally spaced in a ring inan alloy steel cylindrical housing. The method of construction resultsin a very robust instrument suitable for use where high performance, longevity and mechanical strength are important. A heavy gauge, multicore, sheathed cable connects the cell to the readout unit. Themode of operation is by electrical plucking of the vibrating wire.The change in load acting on the load cell is proportional to thedifference of the squared frequency of vibration for the correspondingload. The readings are taken on EKE 871, EKE 875 or EKE 878DataloggersAdvantages?Accurate, robust and very good long term stability?Negligible temperature effects compared with oil filled load cell?Fast response time?Accuracy unaffected by cable length?Suitable for remote readings?Capable of reading eccentric loads?Common readout for all vibrating wire type instrumentsInstallationTensile loads in rockbolts and cables are measured by installing CentreHole load Cells between the rock/concrete face and the tensioning nutof the bolt or anchor. For the most reliable results, a concrete bearingpad should be cast, with its upper face flat and perpendicular to thebolt or cable. A bearing plate is placed beneath the cell to spread theload and to take up any residual nonalignment. A further bearing plateis placed between the cell and anchor. The assembly is centralisedand held in place by applying a small tension to the bolt or cable. Faultin centralisation or alignment will be apparent from differences in loadreadings at each of the vibrating wire gauges in the cell. In situationswhere speed of installation is important, the bearing pad may beformed using high alumina cement or resin grout. Readings of thevibrating wires are averaged to obtain the bolt or cable tension. Inmulti-strand cable anchors, it is possible to tension the strandsuniformly, by monitoring and balancing the load reading for each of thevibrating wire gauges.

EKE 831 to EKE 836

Comprising alloy steel cylinder with three gauges at 120 in thecylinder walls. Each gauge is fixed with non-slip cylindrical endclamps. Electromagnetic pulsing and sensing units with, over voltagesurge arrestors are mounted adjacent to each wire on the outer face ofthe cylinder. The entire unit is then protected by an outer zinc platedsteel sleeve with O ring seals.

Same as EKE 831 to EKE 836, but with six parallel Vibrating WireGauges, located 60 apart in cylinder wall.Centre Hole Bearing PlatesCentre Hole Bearing Plates comprising epoxy painted steel discs withcentral hole for use with EKE 831 to EKE 839 load cells for monitoringtension in rockbolt or cable anchors. The plates incorporate threelocation dowels to assist concentric mounting of the load cell.Details of dimensions as tabulated :

Installation Accessories

EKE 83131 Connecting CableFor use with EKE 831 to EKE 836 VibratingWire load Cells. Six Conductor Copper Wire, insulated colour coded and screened withsheathingEKE 83731 Connecting Cablefor use with EKE 837 to EKE 839 VibratingWire load Cells, twelve Conductors, copper wireinsulated, colour coded and screened withsheathingEKE 83125 Splicing SetTo be used with EKE 83131connecting cableEKE 83725 Splicing SetTo be used with EKE 83731 connecting cable

EKE 837 To EKE 839 Vibrating Wire Centre Hole Load Cell: Dimensions And Range

Dimensions and Range
Catalogue No.	Working Load (kN)	*Overall Dia (mm)**	Centre Hole	Height (mm)
EKE 831	250	102	40	80
EKE 832	500	121	50	80
EKE 833	500	152	90	80
EKE 834	1000	146	50	80
EKE 835	1000	165	90	80
EKE 836	1500	220	150	80
EKE 837	2000	275	190	80
EKE 838	3000	292	190	80
EKE 838	4000	292	190	80

Centre Hole Bearing Plates: Dimensions

Catalogue No.	Working Load (kN)	*Overall Dia (mm)**	Centre Hole	Height (mm)
EKE 83101	EKE 831	103	40	23
EKE 83201	EKE 832	113	50	33
EKE 83301	EKE 833	143	90	33
EKE 83401	EKE 834	136	50	43
EKE 83501	EKE 835	163	90	43
EKE 83601	EKE 836	218	150	48
EKE 83701	EKE 837	262	190	58
EKE 83801	EKE 838	278	190	63
EKE 83901	EKE 839	292	190	68

View Complete Details

Ask Latest Price & Details

Vibrating Wire Centre Hole Load Cell

Product Code:EKE 837 to EKE 839

Vibrating Wire Centre Hole Load Cell:

Installation AccessoriesEKE 83131 Connecting CableFor use with EKE 831 to EKE 836 VibratingWire load Cells. Six Conductor Copper Wire, insulated colour coded and screened withsheathingEKE 83731 Connecting Cablefor use with EKE 837 to EKE 839 VibratingWire load Cells, twelve Conductors, copper wireinsulated, colour coded and screened withsheathingEKE 83125 Splicing SetTo be used with EKE 83131connecting cableEKE 83725 Splicing SetTo be used with EKE 83731 connecting cable

Dimensions And Range

Catalogue No.	Working Load (kN)	*Overall Dia (mm)**	Centre Hole	Height (mm)
EKE 831	250	102	40	80
EKE 832	500	121	50	80
EKE 833	500	152	90	80
EKE 834	1000	146	50	80
EKE 835	1000	165	90	80
EKE 836	1500	220	150	80
EKE 837	2000	275	190	80
EKE 838	3000	292	190	80
EKE 838	4000	292	190	80

Centre Hole Bearing Plates: Dimensions

Catalogue No.	Working Load (kN)	*Overall Dia (mm)**	Centre Hole	Height (mm)
EKE 83101	EKE 831	103	40	23
EKE 83201	EKE 832	113	50	33
EKE 83301	EKE 833	143	90	33
EKE 83401	EKE 834	136	50	43
EKE 83501	EKE 835	163	90	43
EKE 83601	EKE 836	218	150	48
EKE 83701	EKE 837	262	190	58
EKE 83801	EKE 838	278	190	63
EKE 83901	EKE 839	292	190	68