Specifications

18
3.3.6 Configure Strobe Submenu
Thecongurationparametersforthestrobearethesameasthoseforrelays.Astrobewouldnotnormallyrequireaminimumontimebutthisparameterallowsamoreversatile
configuration.
3.3.6.1 Strobe Summary
Figure 3-38 Strobe Summary
This display example shows that the strobe has been configured to operate Normally Off, with a turn on delay and no minimum on time.
Notice that the strobe number, 5, is underlined. This indicates that the digit keys can be used to jump to a particular relay, horn or strobe. The relays are numbers 1, 2 and 3; the horn is
number 4 and the strobe is 5.
3.3.6.2 Strobe Mode
Figure 3-39 Strobe Mode
This display example shows that the strobe is configured to operate in the Normally Off mode. The valid modes are:
2 Normally Off (default)
3 Normally On
3.3.6.3 Strobe Turn On Delay
Figure 3-40 Strobe Turn On Delay
The default turn on delay is one minute and the maximum allowed value is fifteen minutes.
3.3.6.4 Strobe Minimum On Time
Figure 3-41 Strobe Minimum on Time
The default minimum on time is zero and the maximum allowed value is fifteen minutes.
3.3.7 Configure Zones Submenu
The DVP-120 ventilation control can support up to three zones. The zone functionality makes the DVP-120 very flexible. For example, each zone can be configured to monitor a separate
set of four sensors and control a single relay.
Another control scheme uses one zone to monitor all sensors and turn one relay on at a relatively low gas concentration. A second zone monitors the same sensors and turns on a second
relay if the gas concentration reaches a higher level. The third zone can also monitor the same relays turning the last relay on as a signaling device to a live monitor station, as well as
turning on the external horn and strobe, under the assumption that the ventilation system is not working.
In addition to controlling the relays based on the gas concentration, each zone can have a timed function, e.g. turn on low volume ventilation fans at 7:00 AM and turn them off at 8:00 PM.
The default Ventilation Controls are:
• Zone1controlsRelay1
• Zone2controlsRelay2
• Zone3controlsRelay3
• Ineachzone:
- Group 1 is type 1 (CO),
- default Rising (35ppm) and Falling (15ppm) trip points,
- Voting mode,
- Quorum of 1.
- Group 2 is type 2 (NO2),
- default Rising (2.5ppm) and Falling (1.2ppm) trip points,
- Voting mode,
- Quorum of 1.
- Group3istype3(EX),
- defaultRising(5%LEL)andFalling(3%LEL)trippoints,
- Voting mode,
- Quorum of 1.
3.3.7.1 Zone Controls
Figure 0-36 Zone Controls
Z one 1 Cont rols
R1 R2 R3 H4 S5
_____
Figure 3-42 Zone Controls
This display example shows that Zone 1 is configured to control all of the relays plus the horn and the strobe. Each of the relays, the horn and the strobe can be removed from (or added to)
the zones control by pressing the indicated digit key. By default, Zone 1 will control Relay 1, Zone 2 will control Relay 2 and Zone 3 will control Relay 3.