Cannon Instrument miniPV-X - Manual (Page 58)

CANNON ® miniPV-Series Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.a— January, 2011; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
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If both tolerance options are selected, the VISCPRO software will apply both criteria unless the
Use greater option is checked. If Use greater is checked, then the software will apply the less
exacting tolerance value when calculating/evaluating test results.
The Tray Settings: Test window
The Use spread and Use mean radio button options determine the
manner in which the VISCPRO mathematically determines which sample
tests have met tolerance parameters. Testing is continued until a group of
samples meets the tolerance parameters and the rules for sample drop
time determination (see Determinations, below).
Use spread The Use spread option compares the individual drop time values for each
test sample with the individual drop time values of the other samples. If a
sample deviates from tolerance parameters when compared with any other
sample in a grouping, the sample is eliminated from consideration.
Use mean The Use mean option compares the individual drop time values for each
test sample with the mean (average) drop time represented by all samples
in the group. If any sample in the group deviates from the mean by a
value greater than the value specified in the tolerance parameters, the
group is eliminated from consideration.
Determinations Select the determination option by clicking on the radio button corre-
sponding to the appropriate determination method (
Always perform
maximum determinations, Use successive determinations only , or
Use any determinations ).