Bulletin No. 784

TENSITRON@

INC.

Tensitron,Inc. . 1668 Va/teeLane. Boulder;Colorado80301 USA. (303) 444-5383 . FAX (303) 444-0204

,

. Patented

.. Patent Pending

Makers of the original Saxl instruments. American made and serviced by U.S. craftsmensince 1935. Calibration traceable to the National Institute of Standards and Technology

(NLST)

The world'smostpopularmechanicaltensionmeter.

Utilizedextensivelyin majorwire, textile,coilwinding, EDM, fiber optic and syntheticmaterialsmanufacturingand testingenviron-ments.

FEATURES:

.Portable.Versatile.Lightweight.EasyOperation.AutomaticGuides.MagneticDamping.DurableConstruction.Right-or Left-HandOperation.CanAlsoBePermanentlyMounted

TheTriggerTensionMeterwas designedto checktensionof allwire or yarnpreparatoryoperations,fiberoptics,film,tape,narrowfabricsand flatmaterials.The contactelementsare recessedinto thetriggershieldwhich effectivelystopsmaterialfrom catchingand breakingbehind the rollers. Theinternalmagneticdampingmakesfor balancedmovementthatisaccuratein anypositionthemeterisheld.

Squeezethe triggerto separatethe rollers. Insertthe materialagainstthe triggershieldbetweenthecontactelementsand slowly releasethe trigger.Your materialdrops automaticallyin place. Thecenterrollerdeflectsas the tensionin the materialincreases.Readingsare madeon the blackouterdialforthefirstrevolution.Shouldthepointerbegina second revolution,read the red inner dial. Toreleasethematerial,slowlysqueezethe triggerandremovethetensionmeter.

1. COCKTRIGGER,putyarn,wire or web againstguideplate.

2.GENTLYRELEASETRIGGER,read tensionon dial. Firstturnin black,secondin red.

AIR DAMPEDTRIGGER TENSIONMETER

For extremevibrations,the Model "TD"serieshasan added externaldashpotto supplement the internal damping. The precise air dashpot, whichoperates on the upstroke as well as the downstroke, provides substantialdamping of oscillating pointer movement. By adjusting the knurled headvalve attached to the dashpot various ratesof damping can be achieved.Consequently,the pointer staysstillfor a practicalreadout.

The Trigger Tension Meters can be mounted in fixed positions for in-linetension monitoring by meansof a universalbracketwhich is sold separately.Thisallows eitherintermittentor continuous readings,as required.

Bulletin No. 784

-RANGE -MODEL IITR-25TR-125TR-250TR-1000TR-2000TR-4000TR-5000

MODEL II -RANGE -With 1/2"CylindricalRollers,Scoopedor FlangedTM-250 10-]00/250 GRAMS DUAL RANGE

With 1/2",I" Cylindrical,Scoopedor FlangedTM-1000 10-220/1000GRAMSTM-2000 25-440/2000 GRAMSTM-4000 25-600/4000 GRAMSTM-5000 J00-700/5000 GRAMS

DUAL RANGEDUAL RANGEDUAL RANGEDUAL RANGE

5-25 GRAMS5-50/125 GRAMS10-100/250 GRAMS10-220/1000GRAMS25-440/2000 GRAMS25-600/4000 GRAMSJ 00-700/5000 GRAMS

SINGLE RANGEDUAL RANGEDUAL RANGEDUAL RANGEDUAL RANGEDUAL RANGEDUAL RANGE

CORROSION RESISTANT -MODEL "RT" SERIESFormoistmaterialsor operationina dampatmosphere,theModel"RT"serieshasinternalpartsmadeofstainlesssteel,plastic,gold-platedsteel,copperandothermaterialsandtreatmentswhichminimizethedamagedueto moisture.Althoughtheinstrumentisnotwaterproof,itshouldgiveexcellentserviceunderconditionswhereit isexposedtoanoccasionalspray.All triggermetertensionrangesareavailableinthe"RT"series.

HOWTO

CHOOSEYOURBESTDIAL

RANGE

WIRE

Tensionsshouldbe readon the black dial Ifirstrevolution) between 2o'clock and 10 o'clock.The second revolutionIred figures) is forovertravel,and protectsthe meteragainstshock

Bulletin No. 784

or surgesin the linethatmightdamagethemeter.The expandeddial withtwo revolutionsprovidesnot onlybetterresolutionin the lower end wheretensionsare mostcriticalbut also permits occa-

sionalovertravel.Ifyourreadingsfall consistentlyin the red,an instrumentin the nexthigherrangeshouldbeused.

.

SafeoperatingtensionreferencetableandrecommendedTensionMeterforannealedcopperwires:

ModelTR-25

ModelTR-250

ModelTR-2000

As a rule-of-thumb method,the right tension

fora yarnis in thevicinityof .15to .35gramsperdenier. Ifyouryarn is rayon and you arerunning 100 denier40 filament,tensionsprobablyliebetween15and 35 grams. Safe tensionschangewith the materialof theyarnand itsnumberof filamentsIe.g., nylon requires a lowertensionwhilecottonpermitstheuse of higher tension). Forpropercoverageof 15-35grams,the TR-125 instrument isrecommended.

YARN

ModelTR-125

Model TR-1 000

,

ActualSize of Dials

650 700 100

600 I I\ 5000800

550 4000 goo/ 150"~ 1000-500::3000 . 1100-

::"2500 nl8lTR..11Ie.1200,200450 ~~ 1300',/ USA 1400"

"'>2000 1500 \400/"1\\ 250

350 300

Model TR-5000

ModelTR-4000

AWG INCH SAFE TENSION MODEL #

48 - 52 .0013 - .0008 9 - 3 GRAMS TR-2543 - 47 .0022 - .0014 27 - 11GRAMS TR-12539 - 42 .0035 - .0025 66 - 34 GRAMS TR-25035 - 38 .0056 - .0039 166 - 84 GRAMS TR-I00030 - 34 .0100 - .0064 560 - 206 GRAMS TR-200027 - 29 .0142-.0113 1100- 730 GRAMS TR-400024 - 26 .0201 -.0159 2265 - 1100GRAMS TR-5000