Azbil Micro Flow MQV0002, Руководство пользователя

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1-2
Chapter 1. INTRODUCTION
•
User-friendly
Runs on a general-purpose 24 V DC power supply, and the MQV 's internal
power circuit and input/output circuits are isolated. When multiple MQV are
driven through the analog inputs and outputs, as with a PLC, they can all use
a common power supply even if the PLC's analog modules are not isolated by
channel. Therefore, even without individual power supplies for each device,
problems with one circuit do not affect adjacent ones. Also provided is a handy
AC adapter (sold separately) for easy use in the laboratory.
•
Display direction can be changed (models with integrated display only)
The direction of the display can be rotated 180˚ to match the direction of the gas
flow, in case it was mounted the other way.
•
Improved design (separate display model)
A front cover (sold separately) hides the mounting screws of the separate display
on the panel surface and improves the appearance.
•
Various additional functions
The functions listed below are all standard.
„  Functions
All MQV models have the functions described below.
For function setup,
Chapter 5. ADVANCED OPERATION.
•
Multi-setup (function setup
C-04
)
Quickly switch to one of eight preset flow set value by key operation or external
input. If “Switching of SP No.” is set to external 3-way switching input, up to
three set values can be switched.
•
Gas type switching (function setup
C- 18
,
C-26
)
The gas type to be used can be selected from the standard compatible gases by
key operation. Additionally, two kinds of gas type settings can be changed by
external contact input.
•
Gas type setup (function setup
C- 18
)
The user can set gas type conversion factors for gases other than the standard
compatible gases, and for mixed gases.
For information on gas type conversion factors for various gases, contact the
azbil Group.
•
Control flow range setting (function setup
C-24
,
C-25
)
The control flow range can be changed to the desired range (10 to 100 % of
the flow range at factory setting) in units of 1 % FS. The setup and display
resolution levels can be improved by reducing the control flow range.
Additionally, two kinds of control flow ranges can be switched through external
contact input.
•
Direct setup (function setup
C-2 1
)
When changing the flow set value by key input, the controlled flow rate can
follow the set value while changes are being made (the flow set value can be
changed quickly). This function is useful when the user frequently changes set
value, for example when adjusting the flow set value during a trial run.