Macurco DVP-120C Manual
REV – 1.0
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Figure A-23 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 B-2 Default Raising trip points
↑
Falling (off) 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 B-24 Falling Trip Point Entry
↑
Average or Voting Mode
Z 1 G r o u p 1 N O 2
M o d e : 2 V o t i n g
Figure B-25 Sensor Mode Selection
→
Configure Group 2 - repeat for up to three groups
When multiple sensors are being monitored as a Group, the DVP-120 output can be based on either sensor Voting
(default) or the Average of all sensor readings in the Group.
When the configuration is Average, the gas concentrations from all sensors in the Group are averaged.
•
If the average is greater than or equal to the rising trip point, the zone outputs are activated.
•
If 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 (the minimum number of sensor votes in a Group
needed) 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.
•
If a group has an equal number of sensors with gas readings greater than or equal the rising trip point
and sensors with readings less than or equal to the falling trip point, activating the output(s) is given
priority.
It is up to the installer to ensure that the Quorum entry is appropriate for the configuration. Valid entries are from
one to twelve, but a value greater than the number of sensors being monitored by the group stops the group from
controlling the outputs. The default Quorum value is 1
; in this case, only 1 sensor vote is needed to control the
output.
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