Macurco DVP-1200, Manual

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Macurco TM DVP-1200 Manual
REV – 1.3.1 [34-8708-4770-7 ] 35 | P a g e
o
VOTING: The number of sensors (of same type) 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.

For zone outputs to be deactivated first the count of sensors (of same type) with value greater than
or equal to the rising trip point should be less than quorum value and count of sensors (of same type)
with value less than or equal to the falling trip point should be greater than or equal to the quorum.
NOTE: Activating the output(s) is given priority if there is an equal number of sensors (of same type)
with gas readings greater than or equal to the rising trip point and sensors (of same type) with
readings less than or equal to the falling trip point.

QUORUM: It is up to the installer to ensure that the quorum entry is appropriate for the
configuration. 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. Select Quorum and hit Enter after
Selecting Voting to change the quorum to values other than default value of 1.
The default sensor types and settings are as follows:
Description Carbon
Monoxide
Nitrogen
Dioxide
Combustible
Gas
Ammonia Hydrogen
Sulfide
Refrigerants Carbon Dioxide Oxygen
Depletion*
Oxygen
Enrichment*
Type
CO NO
2
EX NH
3
H
2
S REF CO
2
O
2
O
2
Range
200 ppm 20 ppm 50% LEL 100 ppm 50 ppm 1,000 ppm 5,000 ppm 25% v/v 25.0% v/v
Alarm Level
200 ppm 5 ppm 20% LEL 75 ppm 20 ppm 300 ppm 4,000 ppm 19.5% v/v 23.5% v/v
Warning
Level
100 ppm 2.5 ppm 15% LEL 50 ppm 15 ppm 200 ppm 1,500 ppm 20.0% v/v 22.5% v/v
Rising Level
35 ppm 2.5 ppm 10% LEL 25 ppm 8 ppm 100 ppm 1,000 ppm 20.3% v/v 22.0% v/v
Falling Level
15 ppm 1.2 ppm 5% LEL 10 ppm 3 ppm 50 ppm 800 ppm 20.6% v/v 21.5% v/v
Table 4-2 –
*The GROUP CONFIG. menu for Oxygen (SENSOR TYPE 8) has an additional option “O2 MODE” with available options:
DEPLETION, ENHANCEMENT, BOTH. The Oxygen sensor can be configured to signal for:
1. High gas levels (ENHANCEMENT)
Values equal to or greater than 20.9%v/v are only valid for Enhancement settings (Rising, Falling, Warning and Alarm).
2. Low gas levels (DEPLETION)
Values equal to or less than 20.9%v/v are only valid for Depletion settings (Rising, Falling, Warning and Alarm).
3. High and low gas levels (BOTH)
If “BOTH” is selected for O2 mode, then panel will signal alarm, warning or zone activation for both oxygen depletion and
enhancement. E.g. with default settings as indicated in Table 4-2 panel will indicate alarm condition for oxygen sensor reading
of less than or equal to 19.5% vol as well as reading greater than or equal to 23.5% vol if “BOTH” is selected for O2 Mode.
Whereas if “DEPLETION” mode is selected then panel will indicate alarm condition for reading less than or equal to 19.5% vol
only and similarly if “ENHANCEMENT” mode is selected then panel will indicate alarm condition for reading greater than or
equal to 23.5% vol only.