Brookfield CT3 Texture Analyzer Manual de usuario descargar pdf (Pagina 30)

Brookeld Engineering Labs., Inc. Page 30 Manual No. M08-372-C0113

Withinaprobecategory,variationsofgeometrycanbesignicant.Itmayrequirealargerforceto

drive a cone of shallow angle as compared to a cone of steep angle. Similarly, a cylinder of large

diameter may require a larger force than a cylinder of small diameter. The selection of the probe

(type and size) will affect the test result.

  Keephands,ngersandotherbodypartsclearofmovingtestprobeswhen

operating instrument.

IV.3 Test Parameters

The CT3 Texture Analyzer will require the setting of several parameters depending upon the test

method selected (see Table III.1). In general, the following relationships will hold true for Speed

and Distance.

1) The measured load tends to increase as the test speed increases.

2) The measured load tends to increase as the compression distance increases. An exception

to this could be a material with an outer layer such as an apple, or one that fractures.

The Trigger Point establishes the minimum load required to begin the test. This is how the CT3

knows when the probe is touching the sample. This parameter should be set to a low value for a

material with a very delicate outer layer. Trigger value depends upon you load cell. Minimum

recommendations are shown in Table II.2.

The Hold Time allows for monitoring the response of a material as it is held compressed. Normally,

an increase in the Hold Time will result in a lower measured value, as the sample relaxes.

The Cycle Count provides a way of working a sample by compressing it repeatedly and monitoring

its response.

IV.4 Recommendations

The test results of a texture measurement are very dependent on both sample preparation and the

testmethod.Whendevelopingamethod,Brookeldrecommendsthateachparameterbevaried

in turn to determine its effect on the results. (Note:varyonlyoneparameteratatime.)Oncethis

informationisconsideredandamethodestablished,themethodshouldbedocumentedinsignicant

detail. This will ensure good repeatability of results and good comparison with others who attempt

to duplicate your method.

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Brookfield CT3 Texture Analyzer Manual de usuario Pagina 30