Brookfield LFRA Texture Analyzer - Manual (Page 14)

Brookfield Engineering Labs., Inc. Page 14 Manual No. M/05-370-A1205
Depressing the Select / Scroll knob at any time during the test will display the current test param-
eters. At the completion of the test, the final results will be displayed until the Start button or
Reset button is pressed. The Reset button will return the instrument to the Default Display
where test mode may be selected. The Start button will begin the same test again.
A test may be repeated by simply pressing the Start button while viewing the results.
The test may be stopped at any time by using the Stop / Reset button or by pressing Emergency
Stop. We recommend that the Stop / Reset button be used for normal operation. The Emergency
Stop is intended for emergency use only.
III.8 Results
Two parameters will be displayed at the conclusion of a test: Peak Load and Final Load. Both
Peak and Final Load are displayed in units of grams (g). The Peak Load is the highest load value
recorded during the test. The Final Load is the last load value recorded during the downward
travel of the probe. It is possible for the Peak Load to be higher than the Final Load; for ex-
ample, a material with an outer skin such as an apple will show a very high value when the probe
penetrates the skin and a lower value during the remainder of the test.
You may choose to record either Peak Load or Final Load or both. The determination of what
data to record should be based on the nature of the sample and the ability to relate the data to the
material behavior being investigated. For example, if you are interested in the hardness of the
skin of the apple, then you may choose the Peak Load value. If you are interested in the ripeness
of the flesh of the apple, you may choose the Final Load value.
III.9 Checking Calibration
The load calibration of the LFRA
Texture Analyzer can be verified using
the Static Load mode. We recommend
that you use the Brookfield weight set
appropriate for your LFRA load range:
BEL Part No. Load Range
•TA-CW-100C 100 gram
•TA-CW-1000C 1000 gram
•TA-CW-1500C 1500 gram
•TA-CW-4500C 4500 gram
The frequency of the calibration
verification should be set in accordance
to your company procedures.
Hanger
Hanger Mount
Figure III.8