Specifications
12
If an external horn and/or strobe are connected and configured to signal an alarm condition, they will also sound when an alarm condition occurs, after a delay if that configuration option is
used.
When the HUSH key is pressed, the internal buzzer will be silenced for five (5) minutes. If the horn or strobe turn on delays have not finished then they will also be silenced. If the delays
have finished the HUSH key must be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that alarms have been silenced for five minutes. After any key is pressed (or five seconds), the display will return to normal
mode.
Figure 3-7 Alarm Silenced Message
If Relay 1 is configured as an ALARM relay, it will be turned on when an alarm condition is recognized and will be turned off when all audio indicators have been silenced using the HUSH
key.
3.1.5 Warning Status Display
When any sensor indicates a gas level that is at or above the configured warning level for the sensor, the panel will enter WARNING mode during which the internal buzzer will sound, the
alarm/warning lamp will be amber and the LCD will show the sensor type and channel number.
Figure 3-8 Warning Display
The display will cycle through all sensors that are signaling warning levels, at five seconds per display. Pressing any key (except HUSH) will advance the display to the next sensor that is
signaling a warning level.
If the buzzer and/or an external horn and/or external strobe are connected and configured to signal a warning condition, they will also sound when a warning condition occurs. There is a
configurable delay before the horn or strobe will sound, see sections 3.3.4.3 and 3.3.5.3.
When the HUSH key is pressed, the internal buzzer will be silenced for fifteen (15) minutes. If the horn or strobe turn on delays have not finished then they will also be silenced. If the delays
have finished, the HUSH key must be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that warnings have been silenced for fifteen minutes. After any key is pressed (or five seconds) the display will return to
normal mode.
Figure 3-9 Warning Silenced Message
3.1.6 Trouble Status Display
If a sensor fails, a connection is lost or the panel itself detects a failure of its own, the panel will enter TROUBLE mode during which the internal buzzer will sound, the power lamp will be
yellow and the LCD will display the specific sensor identified.
Possible trouble conditions are:
- Any configured channel has less than 4mA flowing in the current loop
- A sensor is reporting a trouble condition
- Any configured channel wiring is open.
- Internal controller board problems are detected.
Figure 3-10 Trouble Display
The display will cycle through all trouble indications, at five seconds per display. Pressing any key (except HUSH) will advance the display to the next trouble indicator.
If an external horn and/or strobe are connected and configured to signal a trouble condition, they will also sound when a trouble condition occurs, after a delay, if that configuration option
is selected.
When the HUSH key is pressed, the internal buzzer will be silenced for eight (8) hours. If the horn or strobe turn on delays have not finished then they will also be silenced. If the delays
have finished, the HUSH key must be held for three (3) seconds in order to silence the horn and strobe.
When all indicators have been silenced, the display will show that trouble indications have been silenced for eight hours. After any key is pressed (or five seconds), the display will return to
normal mode.
Figure 3-11 Trouble Silenced Message
3.2 Ventilation Control
The ventilation control function operates independently from the alarm function. It provides the ability to configure the DVP-120 for control of one to three zones. Each zone can respond to
gas levels indicated by one or more of the three types of sensors, with configurable turn on and turn off concentrations for each gas type. Each zone can also be controlled based on the
time of day and/or two of the sensor types.