Cleanliness measurement of parts cleaned by client
Date Run:
04/06/1998
Experiment Procedure:
Three sets of parts were measured using an OSEE instrument. Each set contained six parts chosen at random. One reading was made for each part and the average OSEE reading was determined. The resultant values were compared to results from previous trials.
SUBSTRATE MATERIAL: Stainless Steel parts CONTAMINANTS: C-Eblis oil (sulfur based)
Trial Results:
Consistent readings were obtained for all the parts tested. Table 1 lists the readings for the three sets as well as the calculated average. Table 1. OSEE Readings of cleaned parts
Set 1
Set 2
Set 3
155
146
160
164
161
169
156
156
172
173
154
169
153
182
162
162
160
144
160.5
160
163
Average
161
Overall Ave
Comparing these values to the results from the previous values reveals that this weeks parts are not as clean as the others. Table 2 lists the three weeks of data. Table 2. Overall Comparison of Parts Cleaned
New Bath
2-Week Old Bath
This Week’s Bath
1343
196
161
Success Rating:
A cleanliness study, addressing only various analytical techniques.
Conclusion:
OSEE readings can be used to determine a relative cleanliness of parts. The lower the OSEE value, the dirtier the part. In order to further justify this conclusion a cleaning trial will be conducted to relate percent removal to the OSEE readings.
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