Fluid Components International FLT Series - Manual (Page 29)

CHAPTER 3 - OPERATION FLUID COMPONENTS INTL
Doc. No. 06EN003246 Rev. B 3 - 11 FLTÔ Series FlexSwitchÔ
Note: The calculated set point must be at least 0.020 volts greater than the normal signal to ensure that the alarm
will reset.
5. Slide the mode switch to the CALIBRATE position.
6. Adjust the calibrate potentiometer (R24) until the voltmeter equals the calculated set point.
7. For the appropriate alarm, determine whether the status LED is on or off (red for No. 1 or green for No. 2).
If the LED is off, turn the set point adjustment potentiometer (R26 for alarm No. 1 or R25 for alarm No. 2)
slowly clockwise just until the LED turns on.
OR
If the LED is on, turn the set point adjustment potentiometer (R26 for alarm No. 1 or R25 for alarm No. 2)
counterclockwise until the LED turns off and then slowly clockwise just until the LED turns on.
8. If this is the only flow application alarm to be setup, then skip to Continue With the Liquid Flow Applications
procedure.
Detecting Increasing Flow Rate (high flow alarm)
1. Establish the excessive flow condition and allow the signal to stabilize.
2. Record the high flow signal. (The high flow signal should be less than the normal flow signal.)
High Flow Signal = ________ volts DC
3. Determine the set point by calculating the average of the normal and high flow output signals. (i.e.; If the
normal signal is 0.080 volts and the high flow signal is 0.030 volts, then the calculated set point would be 0.055
volts.)
4. Record this value.
Calculated Set Point = ________ volts DC
Note: The calculated set point must be at least 0.020 volts less than the normal signal to ensure that the alarm will
reset.
5. Slide the mode switch to the CALIBRATE position.
6. Adjust the calibrate potentiometer (R24) until the voltmeter equals the calculated set point.
7. For the appropriate alarm, determine whether the status LED is on or off (red for No. 1 or green for No. 2).
If the LED is on, turn the set point adjustment potentiometer (R26 for alarm No. 1 or R25 for alarm No. 2)
slowly counterclockwise just until the LED turns off.
OR
If the LED is off, turn the set point adjustment potentiometer (R26 for alarm No. 1 or R25 for alarm No. 2)
clockwise until the LED turns on and then slowly counterclockwise just until the LED turns off.
Continue With the Liquid Flow Applications
1. Slide the mode switch to the RUN position.
2. Establish the normal process flow condition. For low-flow alarm setups, the status LED should be off. For high
flow alarm setups, the status LED should be on.
3. Establish the process alarm condition and monitor the voltmeter display.
4. When the output signal passes through the calculated set point value, the status LED should turn on for low-flow
alarms, off for high flow alarms, and the relay contacts should change state.
5. Reestablish the normal process flow condition. Both the LED and the relay contacts should reset.