Atlanta BYK 5415 매뉴얼 - 페이지 12

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Operation

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.