Brookfield LFRA Texture Analyzer Manual de usuario descargar pdf (Pagina 12)

Brookeld Engineering Labs., Inc. Page 12 Manual No. M/05-370-B0507

Once the test mode is selected the test parameters must be set.

•Normalrequires: Trigger,Distance,Speed.

•HoldTimerequires: Time,Trigger,Distance,Speed.

•CycleCountrequires: Count,Trigger,Distance,Speed.

•Bloomisaxedtestwithpresetparameters.

•Static Load is for verifying calibration and does not require any parameters.

Thetestparametersaredenedasfollows:

Trigger: The load, in grams, measured by the LFRA to indicate that the probe is in con-

tact with the sample. Once the trigger value is reached, the test will begin at the

denedspeed.Brookeldrecommendsatriggervalueof0.5%oftheloadcell

range. For example, use 5g trigger with a 1000g load cell instrument.

Distance: The total downward distance the probe will travel once the trigger value is

reached.

Speed: Thespeedatwhichtheprobewilltravelthespecieddistance.

Time: Thenumberofsecondsthattheprobewillbeheldatthedeneddistanceduring

a Hold Time test.

Count: The number of cycles (Speed and Distance) that will be applied to the sample

during a Cycle Count test.

The parameters must be set within the ranges shown in Table III.1.

Parameter 100g 1000g 1500g 4500g

Trigger 0.1 – 10g 0.2 – 100g 0.2 – 150g 0.6 – 500g

Distance 0.1 – 75mm 0.1– 75mm 0.1 – 75mm 0.1 – 75mm

Speed 0.1 – 10 mm/s 0.1 – 10 mm/s 0.1 – 10 mm/s 0.1 – 10 mm/s

Hold Time 0 – 9999 s 0 – 9999 s 0 – 9999 s 0 – 9999 s

Cycle Count 0 – 99 0 – 99 0 – 99 0 – 99

Table III.1

Deneatestbyrstselectingatestmode.RotatetheSelect/Scrollknobuntiltherequiredtest

modeisdisplayed,thenpresstheSelect/Scrollknobtoconrmyourchoice.Asthetestmodes

aredisplayed,theparametersspecictothatmodewillbeshownwiththepreviouslyselected

parameters.

Onceatestmodeisselected,thecursorwillmovetotherstparameter.Youmayeitherselect

that parameter to enter new values by pressing the Select / Scroll knob or you may scroll to the

next parameter by rotating the Select / Scroll knob.

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Brookfield LFRA Texture Analyzer Manual de usuario Pagina 12