Fluid Components International FLT Series Rack Mount User Manual
Page 43
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
FLT
Series FlexSwitch
Rack Mount
3 - 8
Doc. No. 06EN003250 Rev. N/C
b)
If the status 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 Wet Condition (high level alarm)
a)
If the status LED is on, turn the set point adjustment potentiometer (R30 for alarm 1 or R29 for
alarm 2) slowly counterclockwise just until the LED turns off.
b)
If the status 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.
15. Slide the mode switch to the RUN position. The status LED should be on if the sensing element is dry and off if
the sensing element is wet.
16. Monitor the voltmeter display while raising or lowering the process fluid level. When the output signal passes
through the set point, the status LED should change states and the relay contacts should switch.
17. Reestablish the normal level condition. Both the LED and relay contacts should reset.
18. Disconnect the voltmeter from P1 or P2.
Note: The relay logic default configuration is set for the relay coil to be de-energized when the level signal is
greater than the set point value. (i.e., The relay coil will be de-energized when the sensing element is
dry.)
Temperature Applications
For temperature versus voltage values, see Table 3-8 located at the rear of this chapter. These values have an
accuracy of ±5 °F (2.78 °C). If a factory calibration chart was ordered, look for it in the plastic page protector at the
back of this manual. Make sure the serial number of the chart matches the instrument to be adjusted.
1.
Ensure the configuration jumpers on the control circuit are correct for this application. (See Tables 3-2
through 3-6.)
Caution:
If both alarms are to be used for temperature, then set the heater power jumper to the off (J4 for
channel A or J30 for channel B) position. If one alarm is for temperature and the other is for flow
or level, then the preferred heater power is 0.75 watts (J5). (See Table 3-2.)
2.
Apply power to the instrument. Verify the yellow LED is on and 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-Z12 and the negative (-) lead to
pin P1-Z10; or to the P2 connector with the positive (+) lead to P2-4 and the negative lead (-) to P2-8.
5.
Establish the normal process temperature condition and allow the signal to stabilize.
6.
Record the normal temperature signal value.
Normal Temperature Signal = ________ volts DC
Note: The output signal will vary directly with the process temperature.
7.
Follow either the Detecting Increasing Temperature or the Detecting Decreasing Temperature procedure for
each temperature application alarm.