OAFE-2000
IO&M Manual
Paragon Controls Incorporated
24
Revision Level 000
Enable/Disable Alarms
The Alarms can be enabled or disabled by pressing the toggle button beneath the system tagging.
Both the high and low alarms will be enabled when a value is entered by touching the respective box
and entering a value from the popup keypad. A disable alarms option is available should the user wish
to completely disable the caution alarm. No warning message for the high/low measurement caution
alarms will be displayed as outlined in Section 5.5 if the alarm toggle button is in the “DISABLED” state.
Default is Alarms DISABLED.
Alarm (Low and High)
The Alarm allows the user to change the low or high alarm indication values from 1 to the System’s
operating range. If any individual sensor is below or above the set low or high alarm value and
maintains that value for the set alarm delay duration, an alarm state is displayed as outlined in Section
5.5 on the Main Screen. A value of zero (0) entered in the low or high alarm box will turn that alarm off,
even if the system Alarm is enabled. Therefore, 0 is not an alarm condition; if the user desires an alarm
state at this value a value other than 0 must be entered. A high alarm value cannot be entered if it less
than the low alarm value and the high alarm value will default to the System’s operating range should
that occur.
Default value is set to off (0) for both the low alarm and the high alarm.
Alarm Delay
The Alarm delay allows the user to enter the amount of time required until a high or low alarm is
triggered after the alarm value is reached. The alarm condition must remain for the duration of the
Alarm Delay value before the MTSE will acknowledge and indicate an alarm. This is useful when a fan
is operating near an alarm value and the user does not want unnecessary alarm faults from a
fluctuating flow value. Values accepted are from 0 to 999 seconds and
default is 30 seconds
.
Lockdown
Lockdown is useful in applications where the air handling unit or system is turned off and the user does
not want to see flow because the MTSE is extremely sensitive at very low velocities and may show flow
through leaking closed dampers or backdraft through a fan. Lockdown locks the display and process
values to zero when the system flow values are below the specified Lockdown value entered, as
calculated by percentage of operating range. Once the Lockdown value is exceeded, the display and
output process values are displayed. The Lockdown value can be changed from 0 to 20% of Operating
Range value in 1% increments. Each System and the 2
nd
OA have their own Lockdown % input for
individual tuning of the system to account for system effects.
The default Lockdown value is 3%.
