MAN - BBR3 - REV: Original | E. Operation
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the BBR3. Make corrections if necessary.
3. Press the verification button to begin the verification sequence.
4. Verify the load bearing.
a. Place the thin steel beam on the sample supports, and apply
a 35mN load to the beam by turning the zero load regulator.
b. Observe the reading of the LVDT. Gently grasp the shaft and
lift it upwards approximately 5mm by observing the reading
of the LVDT.
c. When the shaft is released, it should immediately float
downward and gently make contact with the beam.
d. Remove any beams from the supports.
e. Use the zero load regulator arrows to adjust the loading shaft so that it is free floating at the approximate
midpoint of its vertical travel.
f. Gently add a 2g mass to the loading shelf.
g. The shaft will slowly drop down under the weight of the added mass. If everything works as the prompts
require, press “Verification Complete” and then press “Next”.
i. If the results are not in acceptable range, press “Standardization Required” and then press “Next”.
5. Verify the LVDT
a. With the loading frame mounted in the bath at the test temperature, remove all beams from the supports.
b. Place the step gauge disk in any position and apply the provided 100g mass to the weight pan.
c. Compare the measured displacement to the known gauge disk location. This information can be found on the
Certification of Conformance form, as well as on the main Verification screen.
d. If the known dimensions differ from the measurements by more than ±5µm, standardization is required. Press
the “Standardization Required” button and then press the “Next” button.
e. If the measurements are within ±5µm, press the “Verification Complete” button and then press the “Next”
button to move to the next section.
6. Verify the Load Cell
a. Verify the Contact Load
i. Place the Non-Compliant Beam on the sample supports and apply a 20mN load ±10mN using the zero load
regulator. Add a 2g mass to the weight pan.
ii. Verify the increased measured load is 20mN ±5mN. Add the second 2g weight to the weight pan. Verify the
increased measured load is 20mN ±5mN.
Figure E.8 - Confidence beam in place
during verification.
