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INF-TN1FSH-E
4.4.4. Output setting
4.4.4.1. Range (range unit, range type, full scale, hysteresis) setting
Description
Make output setting to output measured value (flow rate or velocity) within specified range from 4 to 20 mA.
(Measurement contents)
(1) Selecting range unit
*1
Select one from the following units (metric system)
m/s
L/s, L/min, L/h, L/d, kL/d, ML/d
m
3
/s, m
3
/min, m
3
/h, m
3
/d, km
3
/d, Mm
3
/d
BBL/
s
, BBL/min, BBL/h, BBL/d, kBBL/d, MBBL/d
(2) Selecting range type
•
Single
•
Auto 2
•
Bi-directional
•
Bi-directional auto 2
Analog output
Base scale
Full scale
Flow rate
20mA
4mA
Analog output
Base scale
Full
scale 2
Full
scale 1
Hysteresis
Flow rate
20mA
4mA
(a) Single range
(b) Auto 2 range
Analog output
Full
scale 2
Full
scale 1
20mA
4mA
Hysteresis
Base scale
Analog output
20mA
4mA
Flow rate
Hysteresis
Base
scale
Full
scale 1
Full
scale 2
Full
scale 3
Full
scale 4
(c) Bi-directional range
(d) Bi-directional auto 2 range
(3) Setting range
Set the full scale by range type. Set the following depending on the range type. The based scale is fixed to 0.
•
Full scale......................... Single range only
•
Full scale 1 and 2 ............ Auto 2 range, bi-directional range, bi-directional auto 2 range*
2
(4) Setting hysteresis
When “AUTO 2,” “BI-DIRECTIONAL” or “BI-DIRECTIONAL AUTO 2” is selected as range type, switching
hysteresis can be provided.
The hysteresis can be set in the range from 0 to 20% of the span.
Auto 1 range:
Hysteresis for full scale 1 or 2, whichever is smaller
Bi-directional range:
Hysteresis for operation range
Bi-directional auto 2 range: Hysteresis for the span of full scale 1 and 2 and that of full scale 3 and 4, whichever is
smaller.
*1) The flow rate or velocity of cut off/flow switch/output correction/rate limit changes with the selection of range unit.
*2) If full scale 1 and 2 are set, full scale 3 and 4 are automatically set.
The following relation holds between full scale 1 and 3 and full scale 2 and 4.
|Full scale 1| = |Full scale 3|
|Full scale 2| = |Full scale 4|