Brookfield LFRA Texture Analyzer Manuel d'utilisateur télécharger pdf (Page 20)

Brookeld Engineering Labs., Inc. Page 20 Manual No. M/05-370-B0507

  NOTE:Samplesweretestedwithoriginalcontainersassupplied.Useof

different dimension holding vessels will change results obtained, there-

fore,operatorsmustbeconsistentwiththetestcongurationused.

READING:

Peak Positive Force

HARDNESS

Total Negative Area

Adhesiveness

(Indication of Viscosity)

Peak Negative Force

ADHESIVE FORCE

Total Positive Area

Consistency

Fat Free

Low Fat

Modulus

Gradient

(from initial

curve only)

DISCUSSION: Once the 4g trigger is attained, the forces continue to increase continu-

ously, until a surface fracture occurs. The modulus changes at this point to

a less steep gradient, and the force plateaus.

The low-fat sample appears much softer than the fat-free, having increased

owovertheplungerwithavisuallylessgrainyandmoreglossyuid

appearance.Thesoftersetischaracterizedbythelowerforcesandareas

of work measured, as well as the shallower slope. The softer set is also

characterizedbythefailuretoformsamplefractureandtheabsenceof

peaks within the curve.

The fat-free sample has a much steeper initial gradient and subsequently

higher values for all measured parameters. Its grainy set structure is char-

acterizedbythelargenumberofpeaksattainedwithinthecurve,whilethe

increased viscosity or spoonability is shown within the negative portion of

the curve.

PARAMETER All parameters were automatically calculated within the Analyze a test

COLLECTION: with tables window. It is therefore necessary to calculate parameters for

each curve individually and record results.

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Brookfield LFRA Texture Analyzer Manuel d'utilisateur Page 20