Macurco DVP-120C Manual
REV – 1.0
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Figure 4-75 Rising Trip Point Entry
The default rising trip points are:
Description
Carbon
Monoxide
Nitrogen
Dioxide
Type
CO
NO
2
Rising
Level
35 ppm
2.5 ppm
Table 4-8 Default Rising Trip Point
4.13.7.8
Falling Trip Point
Z 1 G r o u p 1 N O 2
F a l l i n g : 1 . 0 p p m
Figure 4-76 Falling Trip Point Entry
The default falling trip points are:
Description
Carbon
Monoxide
Nitrogen
Dioxide
Type
CO
NO
2
Falling
Level
15 ppm
1.2ppm
Table 4-9 Default Falling trip point
4.13.7.9
Multiple Sensor Mode
Z 1 G r o u p 1 N O 2
M o d e : 2 V o t i n g
Figure 4-77 Sensor Mode Selection
When multiple sensors are being monitored by a group, the output decision can be based on either voting, as shown
here, or the average of all sensors in the group. Valid modes are:
•
1
Average
•
2
Voting (default)
When the configuration is Average, the gas concentrations from all sensors in the group are averaged and if the
average is greater than or equal to the rising trip point the zone outputs(s) are activated. When the average is less
than or equal to the falling trip point the zone output(s) is de-activated. If the average is between the two trip
points, the outputs remain in their previous state.
When the configuration is Voting, the number of sensors in the group indicating a value greater than or equal to the
rising trip point is counted. If the count is greater than or equal to the quorum then the zone output(s) are activated.
If the count of sensors indicating less than or equal to the falling trip point is greater than or equal to the quorum
the zone output(s) is de-activated. Activating the output(s) is given priority if a group has an equal number of
sensors with gas readings greater than or equal to the rising trip point and sensors with readings less than or equal
to the falling trip point.
4.13.7.10
Multiple Sensor Quorum
