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INF-TN1FSH-E
4.4.10. Flow switch
Description
(1) The flow switch is actuated when the instantaneous flow rate exceeds the specified value. Set the flow switch high
and low values when selecting “FLOW SW HIGH” or “FLOW SW LOW” in status output setting
Setting range: 0 to 32 m/s in velocity. Enter absolute value.
[Relation between status output and setting]
Upper limit setting and FLOW SW HIGH
-32m/s
0m/s
32m/s
ON
OFF
OFF
ON
Upper limit
set value
Hysteresis
Lower limit setting and FLOW SW LOW
-32m/s
0m/s
32m/s
ON
OFF
OFF
ON
Lower limit
set value
Hysteresis
(2) Setting hysteresis
Switching hysteresis can be provided in the following range.
Set it in the range from 0 to 20% of the setting range. (Hysteresis is a ratio to the operation range.)
Operation
(example)
When setting lower limit flow rate to 20 m
3
/h, upper limit flow rate to 180 m
3
/h, and hysteresis to 5%
Key operation
Description
Display
FUNC FLOW SW
Display “”FLOW SW LOW”
FLOW SW LOW
0.00 m
3
/h
ENTER 2 0 ENTER
Enter numeric value enter mode, enter “20”
using ten keys, and press ENTER.
FLOW SW LOW
20.00 m
3
/h
#
Select “FLOW SW HIGH”
FLOW SW HIGH
112.64 m
3
/h
ENTER 1 8 0 ENTER
Enter numeric value enter mode, enter
“180” using ten keys, and press ENTER.
FLOW SW HIGH
180.00 m
3
/h
#
Select “FLOW SW HYS.”
FLOW SW HYS.
10%
ENTER 5 ENTER
Enter numeric value enter mode, enter “5”
using ten keys, and press ENTER.
FLOW SW HYS.
5%
ESC
Display the measurement, reflecting the
setting.
(Measurement display screen)
