14
5.4 (2) Setting of analog output range
Description
An analog output range is set to provide an output of 4 to 20mA in the specified range of
measured values (flow rate or flow velocity).
[Measurement items]
1.
Selection of range unit ............ m/s
l/s, l/m l/h, Ml/d
m
3
/s, m
3
/m, m
3
/h, Mm
3
/d
BBL/s, BBL/m, BBL/h, MBBL/d
2.
Selection of range type
•
SINGLE RANGE: Single range
•
AUTO 2 RANGES: Auto 2 ranges
•
BI-DIR RANGE: Auto forward/reverse range
3.
Setting of range
• BASE SCALE:
Set flow rate value or flow velocity value for 4mA output.
Flow velocity value should be set within the range of 0 to
±
32m/s.
• FULL SCALE:
Set flow rate value or flow velocity value for 20mA output.
Flow velocity value should be set within the range of
±
0.3 to
±
32m/s.
4.
Setting of hysteresis
When selecting “AUTO 2 RANGES” or “BI-DIR.RANGE” from the type of range,
hysteresis is selectable.
Set the hysteresis within the range of 0 to 20% of full scale.
• In case of auto 2-range: Hysteresis of span size of full-scale 1 or full-scale 2, whichever
is smaller
• In case of forward/reverse range: Hysteresis of span in action range
Note 1)
Flow units of low flow cut, flow switch and output compensation flow units
are changed with the selection of the range unit.
Analog output
Single range
20mA
4mA
BASE
SCALE
FULL
SCALE
Flow rate
Analog output
Auto 2 range
20mA
4mA
BASE
SCALE
FULL
SCALE1
Flow rate
FULL
SCALE2
Hysteresis setting
Analog output
Auto range, forward/reverse range
20mA
4mA
FULL
SCALE2
FULL
SCALE1
Hysteresis setting
BASE SCALE
Note 1)
Choose any of
the unit: METRIC system
