DRAFT
MTSE
IO&M Manual
22
Paragon Controls Inc,
Rev J 2/3/2021
Operating Range at 10,000 cfm,
Lockdown set at 10%, which equals 1,000 cfm
Low flow alarm set at 500 cfm
The MTSE will report zero flow and therefore enter a low flow alarm when the measured
flowrate falls below 1,000 cfm for the duration of the lockdown delay. Therefore, a low flow
alarm will be triggered at about 1,000 cfm, not the desired 500 cfm. If the user wishes to read
flowrates down to and alarm at flows below 500 cfm in the above example, decrease the
lockdown percentage below the alarm value (≤5%).
Lockdown Delay
The Lockdown Delay allows the user to enter a lockdown time delay from 0 to 999 seconds that will
delay the display and output locking to zero from occurring until the process value has remained below
the lockdown value for that duration. Lockdown Delay is useful when systems are operating very close
to the lockdown value but because of project limitations the lockdown value cannot be reduced; when
the system flows fluctuate momentarily below the lockdown value the system will still show flow until
this delay time is exceeded. The Lockdown Delay will be global across all Systems and 2
nd
OA.
The
default Lockdown Delay value is 10 seconds
.
4.2.8. Units and Precision
Selecting this menu allows the user to set the measurement type (pressure, velocity, or flow), the
engineering units depending on the measurement type selected, and the number of significant figures.
Shown below is the Units and Precision page.
Measurement Type
Allows user to configure the device for Standard Flow, Actual Flow, Standard Velocity, Actual
Velocity, or Pressure measurement by toggle button. The selected System Measurement Type limits
selection of Engineering Units to only those applicable. Upon changing the Measurement Type, the
Engineering Units will start at the first applicable unit shown on the table below.
Engineering Units
Allows user to configure the device for the available engineering units shown in the table below by
toggle button. The appropriate units will only be made available depending on which measurement type
