Azbil Micro Flow MQV0002, Руководство пользователя

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5-7
Chapter 5. ADVANCED OPERATION
Display Item Item Description Setup Item and Description
Factory
Setting
Remarks
C-22
Control dead zone
setting 0: Function disabled
1: Function enabled 0 Valve operation stops while the
control flow rate is within the OK
judgment range.
The OK judgment range can be set in
the parameter setup mode.
5 - 2 Parameters (P. 5-11).
C-23
PV filter
(process for
filtering of
instantaneous
flowrate) 0: Without filter
1: Two samplings moving
average
2: Four samplings moving
average
3: Eight samplings moving
average
0 If the PV filter is used at a "2" or "3"
setting, the operational differential
pressure must be lower than the
standard differential pressure.
Do not change the setting while
control is in progress.
C-24
Flow rate range
setup 1 0: Standard range
10 to 99: 10 % to 99 % of
standard range. (When
calculating the range
reduction, the value is cut off
at the least significant digit.)
-10 to -99: 10 % to 99 % of
standard range. (When
calculating the range
reduction, the value is not
cut off at the least significant
digit.)
0 The setup and display resolution
levels can be improved by reducing
the flow rate range.
5 - 4 Flow Rate Range Change
Function and Settings and Display
Resolutions After Change of Range
(P. 5-17) for details.
If a value of 10 to 99 is set, the value
is cut off at the least significant
digit when calculating the range
reduction.
Example:
Standard range = 30.0 L/min.
and range setup = 67
Calculation formula:
30.0 x 0.67 = 20.1
→
Since the value is cut off at the
least significant digit, the flow rate
range becomes 20.0 L/min.
The range selected by
C-25
becomes active if "11" is selected for
assignments
C- 10
to
C- 12
(external
contact input function assignment)
and only when the objective contact
is turned ON. However, the range
selected by
C-24
becomes active
otherwise.
C-25
Flow rate range
setup 2 0
C-26
Gas type selection
2 0: Conversion factor for each gas
type set by the user
1: Air, nitrogen
2: Oxygen
3: Argon
4: Carbon dioxide (CO
2
)
5: Natural gas 13A (LNG) (1)
(Heating value: 46 MJ/m
3
)
6: 100 % propane
7: 100 % methane
8: 100 % butane
11: Natural gas 13A (LNG) (2)
(Heating value: 45 MJ/m
3
)
(See
Remarks)
The gas type of the model number is
factory set.
This setting is valid only when "10:
Switching of gas type setup" is
selected at external contact input
function assignment, for any of
C- 10
to
C- 12
.
the Remarks column for
C- 10
to
C- 12
and
C- 18
for details. (P. 5-5,
P. 5-6)