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Vertex M
24-Point Continuous Monitor
TM
Virtual Reference Function
The Virtual Reference option reduces the possibility
that a non-gas event will result in a concentration or
alarm. When enabled, it maintains a record of spe-
cific monitor operation and, in the event of a reading
¼ TLV or above, executes a confirmation before the
concentration or alarm is issued. Once confirmed,
measurements for the same event will not be affect-
ed. See software 1.25.5 release technote for further
information.
The Virtual Reference function is user configurable
by rack (it is disabled by default). See the following
table for the number of windows used and the time to
confirm an event. The function reduces the possibility
that a non-gas event will result in a concentration or
alarm.
Note:
The Virtual Reference function is not used on
CLO analyzers, even if enabled.
Section 3 - Startup
Chemcassette
Hydrides
XP Hydrides
Mineral Acids
Cl2/Oxidizers (NO2)
Mineral Acids (Pyro)
Phosgene
XP Phosgene
Aliphatic Amines
Cl2/Oxidizers-III
Hydrogen Cyanide
Hydrogen Sulfide
XPVChlorine
Fluorine/Oxidizers
XP Ammonia
XP Mineral Acids
XPVMineral Acids (Pyro)
LL Sulfur Dioxide
XP4 Hydrides
XP4 Mineral Acids
XP4 Mineral Acids (Pyro)
XP4 Chlorine
XP4 Ammonia
XP4 Phosgene
3-27
Number of
Time to
Windows
confirm
Pulled
(sec)
3
15-25
3
15-25
6
30-40
6
30-40
6
30-40
6
30-40
6
30-40
3
15-25
6
30-40
3
15-25
3
15-25
6
30-40
3
15-25
3
15-25
6
30-40
6
30-40
3
15-25
3
15-25
6
30-40
6
30-40
6
30-40
3
15-25
6
30-40
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