DRAFT
MTSE
IO&M Manual
21
Paragon Controls Inc,
Rev J 2/3/2021
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 4.5 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 999,999. If any
system 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 4.5 on the Normal Active Display 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.
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 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%.
If Lockdown is set too low
The MTSE may show flow when the air handling unit or system is off; increase Lockdown.
Adjustments should be small as it may take the duration of the lockdown delay and the rolling
average in the system filters to catch up before flow is locked to zero.
If Lockdown is set too high
1)
The MTSE may show pressure on the Sensor Data Page but no flow is displayed; decrease
Lockdown a little at a time until flow is displayed. Adjustments should be small as it may take
the duration of the lockdown delay and the rolling average in the system filters to catch up before
flow begins to be displayed.
2)
If Lockdown is set that is above a low flow alarm value, the system will enter into an alarm state
when the reading falls below the lockdown value after the set lockdown delay. For example,
with the following settings:
