Setra System SRCM - Manual (Page 23)

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Audible Alarm Enables or disables the audible buzzer. Regardless of whether audible
alarming is enabled or disabled, the red ALARM condition will show
on the Home screen, annunciate to an SRAN, and propagate to a
configured Digital Output. If an alarm occurs and the audible alarm is
enabled, a new SILENCE button will appear on the Home screen so
that the operator can silence the audible alarm. The audible alarm is
silenced only for the period of time defined by Mute Time Out.
Mute Time Out Sets the time (in seconds) that the alarm will remain silent after press-
ing the SILENCE button before the audible alarm resumes again.
This assumes that the room pressure condition is still outside the
normal setpoint operating limits. Mute Time Out can be set from 0 to
9998 seconds. Entering a value of 9999 will silence the audible alarm
“forever,” as long as a new alarm condition does not occur.
Digital Input (DI) Used for monitoring the door status, open or closed. The DI is a Nor-
mally-Closed dry contact. A door jamb or valve pressure switch must
be wired to the terminals labeled DOOR in the rear of the unit. When
the door opens the contact will open, and this will show a yellow
DOOR Warning on the Home screen. The Door Alarm will suppress
alarms if they are generated at the same time that the door is open.
Deadband is adjustable from 0 to 10% and represents the region within the
setpoint range where yellow WARNING is displayed on the Home
screen to indicate that the pressure is near ALARM limits. If set to
0, no WARNING will occur, only ALARM when the pressure value
reaches setpoints. If set to any other value, WARNING will be dis-
played if the pressure value reaches that percentage of total pressure
setpoint range.
When the unit goes outside of the deadband range the alarm will oc-
cur. The alarm will remain until the pressure returns within the alarm
limit range (or acknowledged Latch alarm) minus the setpoint.
Buzzer Volume The buzzer volume can be adjusted from one—four, with four being
the highest sound level. The alarm buzzer is disabled using audible
Audible Alarm disable function.