Unitek MICROPULL IV MP4/115, Руководство по эксплуатации и обслуживанию

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CHAPTER 3: OPERATING INSTRUCTIONS
MICROPULL
®
IV WIRE BOND PULL TESTER
3-18 990-180
9 By pressing <F5>, the operator may graph a histogram of the data resulting from the 16 tests in this
example. It will be similar to that shown below:
No. of Bond Tests: 16
Aver. Pull Strength: 12.5 gf
Standard Deviation: 0.7 gf
Standard Deviation: 5.9%
Aver. – 3 (Std Dev.): 10.2 gf
10 The Average Pull Strength, Standard Deviation and related values shown with the histogram may differ
slightly from the results obtained from the actual data as the value assigned to each cell is used for the
histogram calculations and the actual data is used for calculating the summary for each test. Specifically,
if the data taken in step 8 was used, the results would have been:
HISTOGRAM ACTUAL
No. of Tests: 16 16
Aver. Pull Strength: 12.5 gf 12.6 gf
Standard Deviation: 0.7 gf 0.7 gf
Standard Deviation: 5.9% 5.8%
Mean - 3(Std Dev.): 10.2 gf 10.4 gf
PULL
gf
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
0
XXX 3
HISTOGRAM 12-08-1987 TOTAL 16 Bonds
NUMBER OF BONDS - Each X = 1 Bonds
NUMBER OF BONDS - Each X = 1 Bonds
0 10 5 15 20 25 30 35 40 45 50
0 10 5 15 20 25 30 35 40 45 50
0
XXXX 4
XXX 3
XXXX 4
X 1
X 1