- 11 -
Operation depends on the setting of function selection
.
(1) When function selection
is set to
or
(instantaneous flow rate upper
limit switch)
After exceeding the instantaneous flow rate upper limit value and the switch turning
on, the settings for conditions to turn the switch off are set to hysteresis.
[Switch OFF Conditions] = [Instantaneous Flow Rate Upper Limit Value] – [Hysteresis]
Hysteresis is specified as a percentage (%) of the FS flow rate.
Setting value
Flow rate low
Flow rate high
Hysteresis
ON (OFF)
OFF (ON)
( ) indicate inverted output
Note: If the hysteresis threshold value is set below 0, the threshold
value becomes 0 and if the flow rate is minus, it turns off.
(2) When function selection
is set to
or
(instantaneous flow rate
lower limit switch)
After falling below the instantaneous flow rate lower limit value and the switch turns
on, the settings for conditions to turn the switch off are set to hysteresis.
[Switch OFF Conditions] = [Instantaneous Flow Rate Lower Limit Value] + [Hysteresis]
Hysteresis is specified as a percentage (%) of the FS flow rate.
( ) indicate inverted output
Setting value
Hysteresis
Flow rate low
Flow rate high
ON (OFF)
OFF (ON)
(3) When function selection
is
or (instantaneous flow rate range switch)
When
>
, the
setting value is the upper limit and the
setting value is the lower limit.
When
<
, the
setting value is the lower limit and the
setting value is the upper limit.
Operation does not work when
=
.
Hysteresis operation can be taken outside of the lower and upper limit setting
values as shown below.
Hysteresis is specified as a percentage (%) of the FS flow rate. Different settings can
be specified for the upper limit value and lower limit value.
ON (OFF)
OFF (ON)
( ) indicate inverted output
Setting value
Hysteresis
Flow rate low
Flow rate high
Hysteresis
Setting value
・
When
setting value
<
setting value
ON (OFF)
OFF (ON)
( ) indicate inverted output
Setting value
Hysteresis
Flow rate low
Flow rate high
Hysteresis
Setting value
Note: If the hysteresis threshold value is set below 0, the threshold value becomes 0 and if the flow rate is minus, it turns off.
・
When
setting value
>
setting value
Parameter setting list
Display item Item content Setting range
Default
Remarks
Analog output
20 mA flow rate
specification
Note 1
Flow rate value
equivalent to 0
to 400% FS can
be set.
Note 5
Depends
on model
number.
・
Initial default depends on model.
FAS-002
→
200
FAS-005
→
500
FAS-030
→
3000
FAS-060
→
6000
FAS-120
→
12000
・
Setting ranges are values with decimal
points removed. Decimal points will be
added with model settings.
・
Expected output cannot be obtained
when the setting values is less than 10%
of FS. Setting zero outputs fixed output
during an alarm.
・
Reconfigure this setting after changing
the display unit setting with function
selection
.
Analog output
4mA flow rate
specification
Note 1
Flow rate value
equivalent to 0 to 400%
FS can be set.
Note 5
0
・
Settings are values with decimal
points removed. Decimal points will
be added with model settings.
Instantaneous
flow rate switch
Output 1
Note 2
Flow rate value
equivalent to 0 to 400%
FS can be set.
Note 5
0
・
This setting can be configured
when function selection
is
set to
through
.
・
Settings are values with decimal
points removed. Decimal points will
be added with model settings.
・
Reconfigure this setting after
changing the display unit setting
with function selection
.
Switch output
hysteresis 1
Note 2
0 to 10% FS
flow rate
1
Switch output
on delay 1
Note 3
0 to 60 s
0
Instantaneous
flow rate switch
output 2
Note 2
Flow rate value
equivalent to 0 to 400%
FS can be set.
Note 5
0
・
This setting can be configured
when function selection
is
set to
or
.
・
Settings are values with decimal
points removed. Decimal points will
be added with model settings.
・
Reconfigure this setting after
changing the display unit setting
with function selection
.
Switch output
hysteresis 2
Note 2
0 to 10% FS flow
rate
1
Switch output on
delay 2
Note 3
0 to 60 s
0
Output
compensation factor
0.100
〜
2.000
1.000
Can be set in 0. 001 steps. Display value
is reflected in output. Changing setting
resets peak value and lower value.
Low flow cut 1
〜
50
%
1
Applied to both normal and back flow.
Maximum display
value
100
〜
200
%
200
Changes display range maximum value
from standard 200% of FS. When flow
rate exceeds setting value, set maximum
display value alternates with error display
(flow rate over).
Integration switch
setting value
lowest digits
00000
〜
99990
0
Can be configured when function
selection
is set to
through .
Integration
switch setting
value highest
digits
0000
〜
9999
0
Cost rate
Note 4
1.0
〜
100.0 100.0 Specifies the cost rate when cost is
displayed on information display.
Note 2: Instantaneous flow rate switch operation
Setup Guidelines
Note 1: Analog output scaling
Output for an instantaneous flow rate value is calculated using the formula
below.
([Indicated Flow Rate]−[4 mA Setting Value]) ×16
+
4 [mA]
([20 mA Setting Value]−[4 mA Setting Value])
4
m
A setting value : Instantaneous flow rate when 4 mA is output
20
m
A setting value : Instantaneous flow rate when 20 mA is output
・
Minus flow output limit is 3. 2 mA, plus side output upper limit is 20. 8
mA.
・
When [4 mA Setting Value
]
≧
[20 mA Setting Value
], a
fixed output value will be output during an alarm.
・
When [20 mA Setting Value]−[4 mA Setting Value]
<
10% of FS flow rate,
resolution is insufficient so desired output may not be possible.