Azbil Micro Flow MQV0002, Руководство пользователя

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1-4
Chapter 1. INTRODUCTION
•
Flow rate upper or lower limit output (output in comparison with optional
upper or lower limit flow rate set value )
•
Output mode (The four modes — control / fully open / control or fully open /
fully closed — can be identified and output.)
•
OK lamp ON/output (function setup
C-07
,
C-08
)
The
OK lamp
can be set to light when the control flow rate is within the set
value ± allowable range. This function is very handy for verifying at a glance
whether or not there is a proper response to a new set value after its value is
changed.
OK lamp
output can also be used as an interlock signal for subsequent
processes by assigning it to event output and including it in a sequence program.
•
PV filter (function setup
C-23
)
This function is used to average the instantaneous flow rate (control flow rate)
detected value. Use of this function makes it possible to suppress effects of slight
pressure fluctuations.
•
Control dead band setup (prevention of valve operation) (function setup
C-22
)
This function is used to stop the valve from driving as long as the control flow
rate is within the OK range. Additionally, the OK range (width of dead band)
can be set to the desired level.
•
Valve amperage display (function setup
C-20
)
The electric current supplied to the valve can be displayed in units of 0.0 to
100.0 %. Additionally, use of the valve amperage alarm detection function
makes it possible to detect an inlet pressure change or clogging of the piping at
the outlet.
•
Gas type external switching (function setup
C- 10
to
C- 12
,
C- 18
,
C-26
)
Two preset types of gases (including one with a user-determined gas type
conversion factor) can be switched by external contact input.
•
Control flow rate range external switching (function setup
C- 10
to
C- 12
,
C-24
,
C-25
)
Two preset control flow ranges can be switched by external contact input.
•
PV forced zero (function setup
C-29
)
This function forcibly sets the detected instantaneous flow rate to 0 (zero) after
the delay time elapses when the flow rate setpoint has been set to 0 (zero) or the
valve mode has been changed to fully closed. This function makes it possible
to ignore the deviation of the instantaneous flow rate zero point caused by
inclination of the piping or the like.
•
Flow rate display unit change (function setup
C-37
)
This function is used to change the flow rate display unit to L/min or mL/min of
the
MQV9200/9500/0002/0005
. When multiple devices are used side-by-side,
this function can make the flow rate display units uniform.