Cannon Instrument CAV-2000 - Manual (Page 55)

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CANNON ® Automatic Viscometer Models CAV-2100 and CAV-2200 with VISCPRO ® Instruction & Operation Manual
Version 2g — May, 2009; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
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, next page).
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).