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Operator Instrucons WTSTL Tension Link v3.1 12-01-2017
Page 3 of 6
Electrical Checks
Thecorrectconneconofatensionlinktoaninstrumentiscricaltoachievingandmaintainingthe
performanceandreliabilityoftheloadcell.
• Tensionlinkcablingmustbekeptawayfromhighpowercablesandequipment,highoutputRFequipment
andinducveloadsandgenerators.
TensionlinkOutput
Whensengupyourtensionlinkthefollowingpointsshouldbeacknowledged:
• Thezeroloadoutputgivenonthecalibraoncercateistheoutputofthetensionlinkwhennoloadis
applied.Thisincludestheremovaloftheloadcausedbyanyliingaccessories.
• Theloadonaninstalledtensionlinkwillcompriseoftheweightofyourassembly(includingsheaves,
blocks,shackles,ropes,hooksetc.)andtheacveload(loadlied).Therefore,theoutputwithnoacve
loadwillbegreaterthanthezerooutputindicatedonthecalibraoncercate.
ChecksAerInstallaon
• Withthetensionlinkinstalled,checktomakesurethatthedisplayedoutputisnotnegave,asthismay
indicateeitherafaultoracompressiveforceisbeingappliedtothetensionlink.SeeFigure2onprevious
page.
• Whenapplyingloadtothetensionlink,theoutputshouldincreaseintheposivedirecon.Usethe
calibraoncercateforreferenceastotheoutputobservedatcertainloads.
1.5 Calibraon
AllInterfacetensionlinkloadcellsarecalibratedintraceabletestmachinestobestsimulatenormalloading
condions.
Ourgoalistomatchtheloadingcondionsthatwouldbeexperiencedinservicebutitisnotpossibletototally
simulatetheon-sitestructureforeverytensionlinkmanufactured.Itisforthisreasonthatforopmum
systemaccuracy,acalibraoninthenalassemblyisrecommended.On-sitecalibraonshouldbeperformed
withtheinstrumentthatisbeingusedwiththistensionlinkloadcell.
1.6 Warnings / Hazards
Tensionlinksarehighlystresseddevicesandcommonlyhavesafetyfactorsbetweenthreeandvemes
theratedcapacityunderstaccondions.Fagueapplicaonsandenvironmentalfactorscancontributeto
reducingthismargin.Theusershoulddeterminemediaeectsontheexposedtensionlinkmaterials.Wherea
corrosiveenvironmentispresent,tensionlinkscanoenbemanufacturedfromcorrosionresistantmaterials
or,alternavely,isolaonbarrierscanbeemployedbetweenthecorrosiveenvironmentandthetensionlink.