ページを印刷する
Operation
12
use of the magnifying lens. The turn rate
may be reduced slightly (in order to assist
observation) at the fi rst sign of coating
failure. Take the LCD cupping reading at the
fi rst failure point.
*For both methods turn the handle at a constant rate of 0.2
±0.1 mm per second – i.e. at one revolution per second.
8. After completion, unclamp the sample (it
will be necessary to allow the clamp-ring
suffi cient room for the indented dome to be
removed).
9. Check for any detached coating on the
instrument and remove these before starting
another test.
10. Turn the handles in a counterclockwise
direction (as viewed from the right-hand
side of the instrument) to lower the
hemispherical indenter until 0.00 or less
is shown on the LCD and then reverse
direction until 0.00 is shown. The byko-cup
M is now set at the zero position and is
ready for the next test.
11. To conform to the standard, repeat the
test on a new coated test panel, to confi rm
the previous result. If the results differ
signifi cantly, further testing is required in
order to obtain consistent readings.
12. Record the values, stating whether the
results were obtained using standard
corrected eyesight or by use of the
magnifying glass.