EX-MANUAL-032321
29
Set Low Flow Alarm
1.
Press A2 until “LFLo” is displayed, then release A2.
Use the same method as explained above
(“Set High Flow Alarm”) to set the low flow alarm as
follows:
2. Press A2 and hold until the setpoint is displayed on the LCD. Then release A2. The first
digit starts blinking.
3. Use A1 to change the blinking digit (9 rolls over back to 0).
4. Use A2 to select different digits.
5. After the last digit, momentarily press and release A2 to go back to the first digit again, or
continue holding A2 until “SEt” is displayed. Then release A2.
Note 1:
Valid setpoint range is 0-100% of full-scale flow. If the alarm value is set higher than
full-scale, or if it is set higher than the High Alarm value, it will automatically be limited to the lower
of the two values upon exiting this menu (Low Alarm set point cannot be higher than High Alarm).
Note 2:
To disable the alarm, set its value to zero.
Note 3:
The red ALARM 2 LED comes on when flow drops below this setpoint. This LED is in
series with the drive circuit for the low-alarm open-collector output, meaning that the output
transistor is active whenever this LED is on. Some models do not have any external wiring that
connects to the alarm transistor (see Model Codes). The LED turns off when flow > setpoint +
hysteresis. Hysteresis is 5% of full-scale.
