Fluid Components International FLT Series Rack Mount User Manual
Page 44
Doc. No. 06EN003250 Rev. N/C
3 - 9
FLT
Series FlexSwitch
Rack Mount
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Detecting Increasing Temperature (high temperature alarm)
a)
Slide the mode switch to the CAL position.
b)
Adjust the calibrate potentiometer R27 (below the mode switch) until the voltmeter equals the normal
temperature signal.
c)
For the appropriate alarm, determine whether the status LED is on or off (red for alarm 1 or green for
alarm 2).
1)
If the LED is off, turn the set point adjustment potentiometer (R30 for alarm 1 or R29 for
alarm 2) slowly clockwise just until the LED turns on.
2)
If the LED is on, turn the set point adjustment potentiometer (R30 for alarm 1 or R29 for
alarm 2) counterclockwise until the LED turns off and then slowly clockwise just until the
LED turns on.
Detecting Decreasing Temperature (low temperature alarm)
a)
Slide the mode switch to the CAL position.
b)
Adjust the calibrate potentiometer R27 (below the mode switch) until the voltmeter equals the normal
temperature signal.
c)
For the appropriate alarm, determine whether the status LED is on or off (red for alarm 1 or green for
alarm 2).
1)
If the LED is on, turn the set point adjustment potentiometer [R30 (below the red LED) for
alarm 1 or R29 (below the green LED) for alarm 2] slowly counterclockwise just until the
LED turns off.
2)
If the LED is off, turn the set point adjustment potentiometer (R30 for alarm 1 or R29 for
alarm 2) clockwise until the LED turns on and then slowly counterclockwise just until the
LED turns off.
8.
Slide the mode switch to the RUN position.
9.
Establish the normal process temperature condition. For the high temperature alarm setups, the status LED
should be off. For the low temperature alarm setups, the status LED should be on.
10. Establish the process alarm condition and monitor the voltmeter display.
11. When the output signal passes through the set point value, the status LED should turn on for high temperature
alarms, off for low temperature alarms, and the relay contacts should switch.
12. Reestablish the normal process temperature condition. The LED and relay contacts should reset.
13. Disconnect the voltmeter from P1 or P2.
Note: The relay default configuration is for the relay coil to be de-energized when the temperature signal is
greater than the set point value. (i.e., Assume that the normal process temperature condition has been
established. In this state, the relay coil will be energized if the alarm has been set for increasing
temperature detection and de-energized if the alarm has been set for decreasing temperature detection.)
Liquid Flow Applications
1.
As necessary, set the following control circuit configuration jumpers. (See Tables 3-2 through 3-6.)
a)
Application: J14 or J13 (Flow/Level) for alarm 1 or 2, respectively.
b)
Heater Power: J7 (2.5 watts).
2.
Apply power to the instrument. Verify the yellow LED is on, allow the instrument fifteen minutes to warm-up.
3.
Verify the mode switch is in the RUN position.
4.
Attach a DC voltmeter to the P1 connector with the positive (+) lead to pin P1-D12 and the negative (-) lead to
pin P1-B12; or the P2 connector with the positive (+) lead to pin P2-1 and the negative lead (-) to P2-2.