Azbil MVC10A User manual

The Multivariable Air Flow Meter
Model MVC10A/10F
User’s Manual
CM2-MVC200-2001

Copyright, Notices and Trademarks
© 2006-2020 Azbil Corporation. All Rights Reserved.
While this information is presented in good faith and believed to
be accurate, Azbil Corporation disclaims the implied warranties of
merchantability and tness for a particular purpose and makes no
express warranties except as may be stated in its written agreement with
and for its customer.
In no event is Azbil Corporation liable to anyone for any indirect,
special or consequential damages. is information and specications
in this document are subject to change without notice.

Azbil Corporation Preface
Model: MVC10A/10F - Multivariable Air Flow Meter i
Preface
Thank you for purchasing our multivariable Air Flow Meter Model MVC10A/10F.
This innovative ow meter that has been developed based on our long experience and
expertise and has various functions including cost indication and leakage checking
useful for energy-saving control in a wide variety of applications.
CAUTION
For the messages displayed on the local data setting device used for setting operation
parameters of this instrument, “Japanese” is selected in default.
Thus, before starting the operation, switch the language for display to “English.”
For the details of changing languages for display, refer to the Item “Setting the
language for display” under Subsection 4-8, “Initial setting.”

Preface Azbil Corporation
ii Model: MVC10A/10F - Multivariable Air Flow Meter
Unpacking and inspection
Unpacking
This ow meter is a precision instrument. When unpacking, handle it with care to
prevent accidents or damage. Check that the following items are contained:
Waterproong gland and gasket 3 pieces each
Blind plug 2 pieces
Remote type kit (for MVC10F only) 1 set
Bracket for remote type model 1 set
Tube for remote type model 1 tube
Tube tting 1 set
User's manual --
Test report (issued only when specied) --
Verifying the specications
The specications for this device are written on the nameplate attached to the case of
this instrument. Verify that all the specications on the nameplate are correct paying
special attention to the following:
• Basic model number
• Diameter
• Mounting/ow direction
Only if you have specied Tag No., verify the Tag No. checking Tag No. plate on the
side of the case.
Inquiries
If you have any questions regarding the specications, contact our branch and sales
representative oces and your local Azbil Corporation distributor. When making an
inquiry, be sure to let us know the Model and Product Nos. of the product you have
purchased.
Storage precautions
When storing this instrument in the condition in which it was purchased, observe the
following instructions:
• Store the instrument indoors at room temperature and humidity (around 25°C, RH
65%)
• Store it in a place safe from vibration or shocks.
• Store it in the same packaging conditions as it was shipped in.
When storing this instrument after usage, observe the following instructions:
1. Tighten the converter and waterproong gland so that moisture inltration can be
prevented.
2. Return the instrument to its original packaging conditions.
3. Store the instrument indoors at room temperature and humidity in a place free
from vibration and shocks.

Azbil Corporation Preface
Model: MVC10A/10F - Multivariable Air Flow Meter iii
How this Manual is organized and used
Introduction
Safe use of this instrument requires correct installation and operation, and adequate
maintenance. Before starting installation, operation, and maintenance operations, read
the safety precautions in this manual to understand them thoroughly.
Usage precautions
The following symbols are used in this manual to alert you to possible hazards:
WARNING
Denotes a potentially hazardous situation, which if not avoided, could result in death
or serious injury.
CAUTION
Denotes a potentially hazardous situation, which if not avoided, could result in minor
injury or property damage.

Preface Azbil Corporation
iv Model: MVC10A/10F - Multivariable Air Flow Meter
How this Manual is organized and used
Organization and method of use
This manual explains how to use this instrument and related equipment in the
following order:
Chapter 1 Conguration and structure of the measuring system
Explains the measuring systems using this instrument and describes its
structure and the names and functions of its integral parts.
Chapter 2 Installation of this instrument
Describes the methods for installing this instrument and its wiring. The
persons responsible for the installation, piping, and wiring operations
should read this chapter.
Chapter 3 Operation and shut down of this instrument
Describes the operating sequence of activating, operating, and
stopping this instrument. Refer to this chapter when using the installed
equipment and when stopping it.
Chapter 4 Setting parameters and operating the local data setting device
Explains how to operate this equipment by using the local data setting
device. Refer to this chapter when setting or altering the setting of the
available functions.
Chapter 5 Maintenance and troubleshooting of this instrument
Describes the procedures required for the maintenance and inspection
of this equipment and when any trouble occurs with it. When looking
for the explanations required for maintenance and troubleshooting, use
this chapter as an information retrieval means.
Appendix
English and Japanese Messages Comparison Table

Table of Contents
Chapter 1: Conguration and structure of the measuring system
Outline of this chapter ................................................................................ 1-1
1-1: System conguration .................................................................................... 1-2
Measuring system ...................................................................................... 1-2
Introduction ........................................................................................... 1-2
Concept of ow rate measurement....................................................... 1-2
System conguration of analog signal output (4 to 20 mA DC output) ...... 1-3
System conguration ........................................................................... 1-3
1-2: Structure and functions of components ........................................................ 1-4
Structure of this equipment ........................................................................ 1-4
Principal component devices ............................................................... 1-4
Structure of converter................................................................................. 1-4
Principal component devices ................................................................ 1-4
Name and function of each part ................................................................ 1-5
Chapter 2: Installation of this instrument
Outline of this chapter ................................................................................ 2-1
2-1: Before starting installation ............................................................................ 2-2
Criteria for selecting the place for installation ............................................ 2-2
Introduction ........................................................................................... 2-2
Precautions in the environment ............................................................ 2-2
Piping vibration ..................................................................................... 2-2
Inuence of straight pipe section lengths.............................................. 2-2
Selecting the pipe-tting direction......................................................... 2-2
Flow direction........................................................................................ 2-2
2-2: Installation method........................................................................................ 2-4
Basic installation method ........................................................................... 2-4
Introduction ........................................................................................... 2-4
An example of mounting the integral type ............................................ 2-4
Connection with remote type converter ................................................ 2-5
2-3: Electrical wiring............................................................................................. 2-6
Introduction ........................................................................................... 2-6
Connecting positions of the main unit................................................... 2-6
Cable specications.............................................................................. 2-7
Cabling.................................................................................................. 2-7
Current output wire connection............................................................. 2-7
Wiring connection of pulse output......................................................... 2-8
Chapter 3: Operation and shut down of this instrument
Outline of this chapter........................................................................... 3-1

Table of Contents
3-1: Startup .......................................................................................................... 3-2
Activating this instrument ........................................................................... 3-2
Procedure ............................................................................................. 3-2
3-2: Preparatory operation before measurement................................................. 3-3
Introduction ........................................................................................... 3-3
Method for zero adjustment ...................................................................... 3-3
Introduction ........................................................................................... 3-3
3-3: Stopping........................................................................................................ 3-4
Procedure ............................................................................................. 3-4
Chapter 4: Setting parameters and operating the local data setting
device
Outline of this chapter........................................................................... 4-1
4-1: Functions of the local data setting device..................................................... 4-2
Local data setting device............................................................................ 4-2
Names and description of parts ............................................................ 4-2
Name and description of display parts.................................................. 4-3
4-2: Details of operation using the display of the local data setting device.......... 4-4
Overview of each mode ........................................................................ 4-4
4-3: Description of the measuring mode .............................................................. 4-5
Description of the measuring mode ...................................................... 4-5
4-4: Description of the setting menu mode .......................................................... 4-5
Description of the setting menu mode .................................................. 4-5
4-5: Conguration of the “Basic menu” ................................................................ 4-6
Conguration of the “basic menu”......................................................... 4-6
4-6: Conguration of the “maintenance menu” .................................................... 4-7
Conguration of the “MAINTENANCE MENU” ..................................... 4-7
4-7: Method of operation by using the setting menu mode.................................. 4-8
Changing items of the setting menu ..................................................... 4-8
Changing gures within the setting menu............................................. 4-9
4-8: Initial setting.................................................................................................. 4-10
Introduction ........................................................................................... 4-10
Setting tags........................................................................................... 4-10
Setting the reference temperature ........................................................ 4-10
Setting the reference pressure ............................................................. 4-10
Setting the pulse weights...................................................................... 4-11
Setting the cost weights........................................................................ 4-11
Executing the zero adjustment ............................................................. 4-12
Executing the auto ranging function ..................................................... 4-12
Setting the maximum ow rate value.................................................... 4-13
Adjusting the analog output signal........................................................ 4-13

Table of Contents
Setting the language used for displayed messaged ............................. 4-13
4-9: Setting during operation................................................................................ 4-14
Introduction ........................................................................................... 4-14
Switching the main displays.................................................................. 4-14
Setting or changing units ...................................................................... 4-14
Setting or changing the damping time constant.................................... 4-15
Setting or changing a low ow cut value............................................... 4-15
Setting and executing the leak checking function................................. 4-15
4-10: .....................................................................................................................
Details of default settings ..................................................................................... 4-16
4-11: .....................................................................................................................
Explanation on some important functions ............................................................ 4-17
Cost indicating function .............................................................................. 4-17
Auto ranging function ................................................................................. 4-18
Leak checking function............................................................................... 4-19
Chapter 5: Maintenance and troubleshooting of this instrument
Outline of this chapter........................................................................... 5-1
5-1: Maintenance ................................................................................................. 5-2
Disassembling and assembling.................................................................. 5-2
Disassembling ...................................................................................... 5-2
Removing the cover.............................................................................. 5-2
Removing the cover for power supply unit............................................ 5-2
Removing the terminal board and main board...................................... 5-2
Assembling the converter ..................................................................... 5-2
Disassembling and assembling the converter and its xture................ 5-3
Inspection................................................................................................... 5-3
Checking for piping leakage ................................................................. 5-3
Insulation resistance and withstand voltage tests................................. 5-3
Insulation resistance ............................................................................. 5-3
Withstand voltage ................................................................................. 5-4
Replacing a fuse ........................................................................................ 5-4
5-2: Troubleshooting ............................................................................................ 5-5
Types of troubles........................................................................................ 5-5
Troubles at the start of operation ............................................................... 5-5
Troubleshooting ................................................................................... 5-5
Troubles during operation .......................................................................... 5-6
Troubleshooting .................................................................................... 5-6
Display and output state beyond the range of ow rate measurement ..... 5-7
Error messages and corrective actions...................................................... 5-8
Appendix English and Japanese Messages Comparison Table

Table of Contents

Azbil Corporation Conguration and structure of the measuring system
Model: MVC10A/10F - Multivariable Air Flow Meter 1-1
Chapter 1: Conguration and structure of the
measuring system
Outline of this chapter
This chapter explains the measuring systems using this instrument.
• The instrument’s structure and the names and functions of its integral parts are
described.

Conguration and structure of the measuring system Azbil Corporation
1-2 Model: MVC10A/10F - Multivariable Air Flow Meter
1-1: System conguration
Measuring system
Introduction
This instrument is utilized in combination with a detector and a converter.
• Integral type .......... The detector and converter are integrated and mounted on a
pipe for the actual service.
• Remote type .......... The detector and converter are isolated and connected with a
tube.
Concept of ow rate measurement
Figure 1-1 shows the outline of a ow-rate measuring system using this equipment.
Analog output wiring inlet
Pulse output wiring inlet
Power cable inlet
Converter
Fluid
Detector
Fig. 1-1 Measuring system in an integral conguration

Azbil Corporation Conguration and structure of the measuring system
Model: MVC10A/10F - Multivariable Air Flow Meter 1-3
System conguration of analog signal output (4 to 20 mA DC output)
System conguration
The following illustrates the system conguration in the case where instantaneous
ow-rate value is output as an analog signal of 4 to 20 mA DC.
In this system conguration, the analog signal can be output from this instrument to
the monitoring or control system in a layer directly above the instrument.
This instrument
Receiving
instrument
4-20 mA DC analog signal
Fig. 1-2 Concept drawing of integral type measuring system
• This instrument: Measures ow-rate and outputs instantaneous ow-rate values in
analog signals (4 to 20 mA DC).
• The analog output range is 3.8 mA to 20.8 mA DC (-1.25% to +105%).
• The load resistance is 245 to 300W

Conguration and structure of the measuring system Azbil Corporation
1-4 Model: MVC10A/10F - Multivariable Air Flow Meter
1-2: Structure and functions of components
Structure of this equipment
Principal component devices
This instrument consists of a ow-rate detector and a converter.
Cover flange
Converter
Detector
LCD (display)
Local data
setting device
Signal output wiring outlet
(analog, pulse)
Power cable inlet
Fig. 1-3 Details of ow meter
Structure of converter
Principal component devices
The converter of this instrument is composed of a main board, a terminal board, a
keyboard assembly, and a converter cover.
Tag plate
Main board
Terminal block
Fuse
Terminal board
Power unit cover
mounting screws
(4 x M3)
Power unit cover
Terminal board mounting
screws (4 x M3)
Main board mounting screws
(4 x M3)
Fig. 1-4 Structure of converter case

Azbil Corporation Conguration and structure of the measuring system
Model: MVC10A/10F - Multivariable Air Flow Meter 1-5
Fixing screw (4 x M3)
Protective sheet (polycarbonate resin)
Keyboard assembly (with an LCD)
Cover (with a decorative plate)
Fig. 1-5 Structure of converter cover
Name and function of each part
Details of each part are described in the following table:
Name Description
Detector
• A tapered orice is installed in a ow channel to generate a
dierential pressure between the upstream section and the orice.
• Detects dierential pressure and static pressure
Converter
• Performs calculation by using the values of detected dierential
pressure, static pressure, and ambient temperature and converts
them into instantaneous ow rate values.
• Outputs an instantaneous ow-rate value as an analog or digital
signal to the control units.
Terminal board
• Accommodates an output terminal block.
• Accommodates a power supply unit.
• A fuse is provided.
Main board
• Indicates calculated results of instantaneous ow-rate values and
cumulative values.
• Allows the user to set or alter the ow meter functions by using the
seven buttons equipped on the panel.
Nameplate • Model No., Product No., and ow-rate range are described on it.
Tag No. plate • A Tag No. is indicated when specied by the purchase order.

Conguration and structure of the measuring system Azbil Corporation
1-6 Model: MVC10A/10F - Multivariable Air Flow Meter

Azbil Corporation Installation of this instrument
Model: MVC10A/10F - Multivariable Air Flow Meter 2-1
Chapter 2: Installation of this instrument
Outline of this chapter
This chapter describes the method for installation and wiring of this instrument.

Installation of this instrument Azbil Corporation
2-2 Model: MVC10A/10F - Multivariable Air Flow Meter
2-1: Before starting installation
Criteria for selecting the place for installation
Introduction
To maximize the performance of this instrument, choose the optimum installation
location to satisfy the following selection criteria:
Precautions in the environment
• Install this instrument at a place where the ambient temperature is in the range
from -15 to +50°C and ambient relative humidity 5 to 95%.
• Avoid a place close to a large-current cable, motor, transformers, or power supply
sources that may give rise to induction interference and/or acoustic noise, which
may cause instrument failure or errors in output values.
• Avoid a place where there are severe vibrations (permissible piping vibration:
5 m/s2 maximum) or a highly corrosive atmosphere, which may cause failure of
equipment.
• Also avoid whenever possible subjecting the instrument to direct sunlight, which
may cause output errors.
Piping vibration
Use this instrument under the following conditions: Amplitude: 1.5 mm minimum for
a frequency 0 to 9 Hz; Acceleration 1.5 m/s2 minimum for 9 to 60 Hz.
Inuence of straight pipe section lengths
Determine the length of a straight pipe section by referring to the following table.
It is the minimum length of a straight pipe section required for the connection
between this instrument and each joint of the upstream and downstream sides of the
instrument. Each number in the table denotes a multiple of the pipe diameter.
D
L1L2L1
L1L1
L1
L1L2
L2
L2
L2
L2
3.5D
0.5 1.5 2.5 1.5 2.5 0.6
4.0
Multivariable mass
flow meter Multivariable mass flow meter Multivariable mass flow meter Multivariable mass flow meter Multivariable mass flow meter Multivariable mass flow meter All the
joints
shown to
the left
Downstream
side L2
One 90o bend Two or more 90o
bends on a
single plane
Two or more 90o
bends not lying
on a single plane
Reducer Expansion pipe Sluice valve
(fully open)
Upstream side L1
When a ow control valve is installed on the upstream side, provide a distance of
10 D or more from this instrument.
Note 1: Set the value of curvature radius against a valve to that of the bore diameter or more of
the duct line.
Note 2: The straight pipe lengths on the upstream and downstream sides are the distances
measured from the upstream and downstream anges, respectively, of the ow meter.
Fig. 2-1 Straight pipe section on the upstream side of the ow meter
(D: Nominal bore diameter of detector)
Selecting the pipe-tting direction
Fit the pipe in horizontal or vertical piping.
Flow direction
This instrument has an oval orice in the pipe, and the service direction is specied. Allow
the work uid to ow in the direction of the arrow marked on the side of the detector.

Azbil Corporation Installation of this instrument
Model: MVC10A/10F - Multivariable Air Flow Meter 2-3
NOTE
When the ow velocity of the uid going through this instrument is relatively high,
an unusual sound may be audible, which does not, however, cause any problem in the
service of this instrument.
CAUTION
Since the work uid contains more or less water, remove the accumulated water
inside the remote type tube and pressure-bearing cover of the body. Otherwise, an
output shift may result.

Installation of this instrument Azbil Corporation
2-4 Model: MVC10A/10F - Multivariable Air Flow Meter
2-2: Installation method
Basic installation method
Introduction
This instrument employs a ange type mounting. Refer to the description on
mounting method and install it correctly.
An example of mounting the integral type
Fig. 2-2 An example of mounting the integral type
CAUTION
• Since this instrument is a heavy object, exercise great care not to drop it on your feet or other
parts of your body. If it is dropped by mistake, you may be wounded or suer a broken bone.
Bore diameter 50 A 65 A 80 A 100 A 150 A
Weight 9 kg 11 kg 13 kg 18.5 kg 39.5 kg