Alarm Constraints - Pressura RPM10 Operation And Service Manual

Rm2 Alarm Menu
SOFTWARE
MENU ITEM
NAME
Room 2 Positive Pos Hi Alm
High Alarm
RPM20

ALARM CONSTRAINTS

There are a number of constraints that prohibit you from incorrectly adjusting the set points. These are as follows:
1. Room mode. The positive pressure alarms are only active when positive control is selected. Negative pressure alarms are only active
when negative control is selected. In no isolation mode all alarms are turned off.
2. The PresSura monitor is programmed with deadbands between alarm setpoints to prevent the controller from cycling between high and
low alarms due to normal fluctuations. Setpoint deadbands are:

Pressure = 0.001 in H

Flow = 50 cfm

Temperature = 1°F

Relative Humidity = 1%

Position = 1% Open
Example: The control NEG LOW ALM is set at -0.01" H
3. Alarms do not terminate until the room pressure slightly exceeds the alarm setpoint.
4. The ALARM RESET item selects how the alarms will terminate when the controller returns to the safe range. The pressure and flow
alarms all terminate the same; they are either latched or unlatched. If unlatched is selected the alarms automatically turn off when the
value slightly exceeds the alarm setpoint. If latched is selected, the alarms will not terminate until the pressure or flow exceeds the alarm
setpoint and the key is pressed.
5. There is a programmable ALARM DELAY that determines how long to delay before activating the alarms. This delay affects all alarms,
pressure and flow.
6. The MUTE TIME item temporarily turns the audible alarm off for all pressure and flow alarms.
ITEM DESCRIPTION
The Pos Hi Alm item sets the positive high pressure
alarm setpoint. A high alarm condition is defined as when
the magnitude of the room pressure rises above the Pos
Hi Alm setpoint.
This item is enabled when the TSI key switch is in positive
room pressure position or when POSITIVE is selected in
Room Mode item.
O
2
O. The NEG HI ALM cannot be set less negative than -0.011" H
2
ITEM RANGE DEFAULT VALUE
-0.19500 in H O to 0.10000 in H
2
+0.19500 in H O
2
Note: Pos Hi Alm
cannot be set
less than
positive the
Pos Lo Alm
O.
2
O
2