Onicon FT-3100, Programming Manual

Page: 24 / 36

FT-3100 TRANSMITTER PROGRAMMING GUIDE
ONICON Incorporated 727.447.6140 Page 24 onicon.com
This function sets the alarm threshold for minimum reverse flow. Flow rates
below this threshold will trigger the alarm. The threshold value is entered as a
flow rate in the engineering units shown. The minimum value must be ≥1% of
the full scale maximum flow rate of the meter (10m/s or 32.8ft/s velocity). Alarm
threshold values are entered in 1% increments of the full scale limit up to 100%.
Example: In a 6” pipe 32.8 ft/s is equal to 2853 GPM. 1% of this value would be
approximately 28.5GPM. Alarm threshold values would be entered in increments
of 28.5 GPM.
To enter a value, press enter to access the function. Use the up arrow and right
arrow keys change the threshold value. Press enter to accept the change and exit
the function. Press escape to exit the program mode. Table of Contents
This function is used to define the flow value where the meter exits the minimum
or maximum flow alarm state. When flows drop below the threshold for the
maximum flow alarm or rises above the minimum flow alarm by more than
the hysteresis percentage value, the meter exits the alarm state. It is set as a
percentage of the full scale flow rate 1 [FS1 = Gal/m XXX.X] in SCALES menu
(menu 3. The range of settings is 0-25% of full scale.
To enter a new value, press enter to access the function. Use the right arrow key
to move the cursor and the up arrow key to change the threshold percentage.
Press enter to accept the change and exit the function. Press escape to exit the
program mode. Table of Contents
This function establishes the 0/4-20mA output level when the meter is in an
alarm condition caused by an empty pipe, ADC error or an open coil indication.
The alarm value is set as a percentage of the 0/4 – 20mA output. The valid range
is 0-125% of 20mA. For example, a setting of 10% would cause the output to go
to 2mA when the meter is in the alarm state. One or more alarm icons will also be
displayed in the upper left hand side of the display when this alarm is active.
The default setting is 20% (4mA.
To enter a new value, press enter to access the function. Use the right arrow key
to move the cursor and the up arrow key to change the value. Press enter to
accept changes and exit the function. Press escape to exit the program mode.
Table of Contents
Alarm Hysteresis Threshold
[Hysteresis = % XXX]
mA Output Value When in
Alarm State
[mA v.alarm = % XXX]
Minimum Reverse Flow
Alarm Threshold
[Min - = Gal/m OFF]