The 2 HIGH ALM item sets the second sensor’s high alarm set
point. A high alarm condition is defined as when the magnitude
of the second sensor’s room pressure rises above the 2 HIGH
ALM set point. The alarm can be a negative or positive
pressure alarm set point.
The second sensor low and high alarms must be programmed
for the same pressure direction; positive or negative. In
addition, the PresSura controller has a minimum dead band of
40 ft/min between the second sensor low and high alarms. The
dead band helps prevent nuisance alarms.
The second sensor monitors the room pressure of a second
space (typically and ante room), and is not part of the primary
sensor or control sequence. This alarm is on when the DIM is in
positive or negative mode.
This item is enabled when the second pressure sensor item is
enabled (see menu item 2 SENSOR).
The ALARM RESET item selects how the alarms terminate
after the unit returns to the safe pressure range (pressure or
flow). UNLATCHED (alarm follow) automatically resets the
alarms when the unit reaches the safe pressure range.
LATCHED requires the staff to press the RESET key after the
unit returns to safe pressure range. The ALARM RESET affects
the audible alarm, visual alarm, and relay output, which means
all are latched or unlatched.
The AUDIBLE ALM item selects whether the audible alarm is
turned ON or OFF. Selecting ON requires the staff to press the
MUTE key to silence the audible alarm. Selecting OFF
permanently mutes all audible alarms.
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