Cannon Instrument CAV-2000 - Manual (Page 69)

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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
Viscosity Index calculations require kinematic viscosity data derived
from samples tested at a high and a low temperature. The VI Matcher
permits the user to define which viscometer tubes are high temperature
tubes and which are low temperature tubes.
The VI Matcher General Configuration window
After the VI Matcher has been initially configured by the user or CAN-
NON
® representative (this is ordinarily done during instrument setup),
the VI Analysis can be used to automatically scan the VISCPRO ®
sample database for samples with matching Sample IDs. If samples with
an identical Sample ID have been tested on a low temperature tube and a
high temperature tube within an 8-hour time span, the VI for those
samples can be calculated and displayed on the VI analysis. The VI
Matching function is always indicated on the VISCPRO
® status bar,
whether or not a VI domain has been defined (see below).
Configuration procedure To configure the VI Matcher:
1. Load the VISCPRO
® software.
2. Log on to the system as a Manager (a password may be required) to
access the VI Matcher function, which is security-protected.
NOTE For more information on the security log-in procedure, see Security
Options, this chapter.
3. Select VI Matching—General Configuration from the Configura-
tion menu options. The General Configuration window will appear.
4. Click on the Allow Matching of Invalid Samples box if you wish to
permit VI matching of samples with flow times exceeding the
specified tolerance for repeatability.
NOTE The VI Matcher does not match invalid samples UNLESS the Allow
Matching ... box is checked. The VI Matcher never matches unsuccess-
ful samples (samples with no flow time and a displayed kinematic