Brookfield LFRA Texture Analyzer - Manual (Page 14)

Brookfield Engineering Labs., Inc. Page  Manual No. M/05-370-B0507
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 veri-
fication should be set in accordance to
your company procedures.
Start the calibration verification pro-
cess by using the Select / Scroll knob
to set the test mode to Static Load and
then press the Start button. The display
will request that you attach the Hanger
Mount to the Probe Shaft (see Figure
III.8); then press Start. The LFRA must
now be zeroed by pressing the Start
button.
Figure III.8
Hanger
Hanger Mount