Ametek BROOKFIELD CT3, Руководство по эксплуатации

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AMETEK Brookfield Page 29 Manual No. M08-372-F1116
value. This will be reported as a positive value, rather than a negative value.
Pressing and holding the Select Knob while displaying the FINAL screen will show the SETUP
screen for reference. Releasing the Select Knob will revert back to the FINAL screen.
Re-starting the test can be performed in two ways.
1)
Quick Start
. When the FINAL test screen is displayed, the operator can do a quick restart of
the test by pressing the START button. The CT3 will begin the AUTOZEROING
process and execute the same test again.
2)
Full Start
. When the FINAL test screen is displayed, the operator can do a full restart of
the test. Pressing the STOP button at this time will display the SETUP screen.
The various setup parameters can then be modified as needed before pressing
the START button to begin the full test.
The following test is not included in the CT3 unless requested by the customer at the time when
the instrument is first ordered. It replaces the TARGET HOLD test.
SURIMI TEST - performs a single compression of a surimi sample until the gel ruptures.
The test result will be the distance the sample deformed before it ruptured and the peak load
just prior to the rupture. As soon as the rupture occurs the probe retracts to the HOME
starting position.
NOTE: This test is only available in CT3 instruments with load cells up to 4500g and firmware
version 2.0 or higher.
The operator may set the trigger value, correction value and test speed.
TEST: SURIMI
TRIGGER:
5.0 g
CORRECTION: 30 g
SPEED: 1.0 cm/s
Figure III.32
The trigger value is a small load, in grams, measured by the CT3 that indicates the probe is in contact
with the sample. Once the probe contacts the sample the test will begin at the defined speed. The
range of acceptable trigger values depends upon the load cell in use and is shown in Table III.1.
In general, the trigger value should be large enough to prevent a false trigger from starting the test
before the probe comes in contact with the sample. A false trigger is usually the result of excessive
vibrations passing through the lab bench. A 5g trigger is typical.
When the surimi sample ruptures, the load measured by the CT3 will drop. The Correction value
specifies the size of the load drop, in grams, that is required to recognize a gel rupture. The correction
value may be set from 5g to 99g. The two most common correction values used are 30g or 50g.
The default setting is 30g and should be good for most surimi applications.
The test speed for all surimi testing has historically been 1 cm/s, so this is the default value. The
test speed can be set from 0.1 mm/s to 10 mm/s, which is equivalent to 1 cm/s.
Changing the test speed is likely to change the gel result.