To Next Page

To Previous Page

FLT

Series FlexSwitch

OPERATION

Fluid Components International LLC 27

Detecting Increasing Temperature (High Temperature Alarm)

1. Move the Mode switch to the CAL position.

2. Adjust the calibrate potentiometer (R24) until the voltmeter equals the desired temperature signal as indicated in Table 3-7.

For the appropriate alarm, determine whether the status LED is on or off (red for Alarm No. 1 or green for Alarm No. 2).

If the LED is off, turn the setpoint adjustment potentiometer (R26 for Alarm No. 1 or R25 for Alarm No. 2) slowly clockwise just until the

LED turns on.

If the LED is on, turn the setpoint adjustment potentiometer (R26 for Alarm No. 1 or R25 for Alarm No. 2) counterclockwise until the LED

turns off and then slowly turn pot clockwise just until the LED turns on.

If this is the only temperature application alarm to be set up, then skip to the Continue With The Temperature Applications Procedure.

Detecting Decreasing Temperature (Low Temperature Alarm)

1. Move the Mode switch to the CAL position.

2. Adjust the calibration potentiometer (R24) until the voltmeter equals the normal temperature signal.

3. For the appropriate alarm, determine whether the status LED is on or off (red for Alarm No. 1 or green for Alarm No. 2).

If the LED is on, turn the setpoint adjustment potentiometer (R26 for Alarm No. 1 or R25 for Alarm No. 2) slowly counterclockwise just

until the LED turns off.

If the LED is off, turn the setpoint adjustment potentiometer (R26 for Alarm No. 1 or R25 for Alarm No. 2) clockwise until the LED turns on

and then slowly turn pot counterclockwise just until the LED turns off.

Continue With The Temperature Applications Procedure

1. Move the Mode switch to the RUN position.

2. Establish the normal process temperature condition. For the high temperature alarm setups, observe that the status LED is off at normal

temperatures. For the low temperature alarm setups, observe that the status LED is on at normal temperatures.

3. Establish the process alarm condition and monitor the voltmeter display.

4. When the output signal passes through the setpoint value, observe that the status LED turns on for high temperature alarms or off for

low temperature alarms, and that the relay contacts change state.

5. Reestablish the normal process temperature condition. Observe that the LED and relay contacts reset.

6. Disconnect the voltmeter from P1.

7. Replace the enclosure cover.

Note:

The default relay logic conﬁguration is for the relay coil to be de-energized when the temperature signal voltage is greater

than the setpoint value; i.e., in a normal process temperature condition the relay coil is energized. It is recommended to have

the relay coils energized when the process temperature is normal. This lets the relay go into a fail-safe alarm state in case of

a power failure.

FCI FLT93B User Manual

Questions and Answers: