Azbil MCF0080 User manual

MCF
Air Flowmeter
User's Manual
for
Installation and Configuration
No. CP-SP-1276E
Thank you for purchasing the MCF.
This manual contains information for
ensuring the correct use of the MCF. It
also provides necessary information for
installation, maintenance, and trou-
bleshooting.
This manual should be read by those
who design and maintain equipment
that uses the MCF. Be sure to keep this
manual nearby for handy reference.

The µFTM, Micro Flow and µF sensor are a trademark of Azbil Corporation in
Japan.
NOTICE
© 2008-2012 Azbil Corporation All Rights Reserved.
Be sure that the user receives this manual before the product is used.
Copying or duplicating this user’s manual in part or in whole is forbid-
den. The information and specifications in this manual are subject to
change without notice.
Considerable effort has been made to ensure that this manual is free
from inaccuracies and omissions. If you should find an error or omis-
sion, please contact the azbil Group.
In no event is Azbil Corporation liable to anyone for any indirect, special
or consequential damages as a result of using this product.

Conventions Used in This Manual
i
■To prevent injury to the operator and others, and to prevent property damage, the following types of safety
precautions are indicated:
■In describing the product, this manual uses the icons and conventions listed below.
Use caution when handling the product.
The indicated action is prohibited.
Be sure to follow the indicated instructions.
Handling Precautions:
Handling Precautions indicate items that the user should pay attention to when
handling the MCF.
Note:Notes indicate information that might benefit the user.
:This indicates the item or page that the user is requested to refer to.
(1), (2), (3): Numbers within parentheses indicate steps in a sequence or parts of an
explanation.
>>: Indicates the result of an operation, details displayed on the personal computer or
other devices, or the state of the device after operation.
WARNING Warnings are indicated when mishandling this product might result in
death or serious injury.
CAUTION Cautions are indicated when mishandling this product might result in
minor injury to the user, or only physical damage to the product.

ii
WARNING
Never allow gases that are within explosive limits to pass through this device. Doing so could
result in an explosion.
Do not use this device for oxygen gas. Doing so could result in a serious accident.
Safety Precautions
CAUTION
Be sure to use this device within the flow rate range stated in the specifications. To prevent
excessive flow, use a suitable means to control the supply pressure or use a throttle valve or
the like to control the flow rate.
If damage could result from the abnormal functioning of this device, include appropriate redun-
dancy in the system design.
If there is a risk of a power surge caused by lightning, use Azbil Corporation's SurgeNon to
prevent possible fire or equipment failure.
When carrying the flowmeter or connecting it to the pipe, do not hold it by the measurement
module. Doing so could cause damage, or the device could drop, causing an injury.
To avoid damaging this device, do not use it outside of the operating pressure range. Also, do
not subject it to a pressure above its pressure resistance.
When maintaining or replacing the measurement module, release the internal pressure of this
device before removing the measurement module.

The Role of This Manual
iii
Three manuals are available for the MCF. Read appropriate manuals according to your requirements. If you do not
have a required manual, contact the azbil Group or your dealer. Additionally, you can download necessary manuals
from http://www.azbil.com.
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MCF Air Flowmeter User's Manual for Installation
Manual No. CP-UM-5498JE
This manual is supplied with the device. Personnel in charge of design and/or
manufacture of a system using this device must thoroughly read this manual.
This manual describes the safety precautions, installation, wiring, list of
parameters, and primary specifications.
MCF Air Flowmeter User's Manual for Installation and Configuration
Manual No. CP-SP-1276E
This manual. The manual describes the hardware and all functions of this
device. Personnel in charge of design, manufacture, operation, and/or main-
tenance of a system using this device must thoroughly read this manual. It
describes installation, wiring, functions and settings, operating procedures,
troubleshooting, and specifications.
MCF Air Flowmeter User's Manual for Communication Functions
Manual No. CP-SP-1300E
Those using the "communication functions" of the MCF series should read
this manual.
This manual describes an outline of communications, wiring, communication
procedures, a list of MCF series communication data, how to remedy trouble,
and communication specifications.

Contents
iv
Conventions Used in This Manual
Safety Precautions
The Role of This Manual
Chapter 1. OVERVIEW
■Summary•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
■Features •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
■Model selection guide••••••••••••••••••••••••••••••••••••••••••••••••••••2
■Optional parts (sold separately)••••••••••••••••••••••••••••••••••••••••••2
Chapter 2. PART NAMES AND FUNCTIONS
■Parts name and functions••••••••••••••••••••••••••••••••••••••••••••••••3
Chapter 3. MOUNTING AND WIRING
■Installation location ••••••••••••••••••••••••••••••••••••••••••••••••••••••4
■Excessive flow rate ••••••••••••••••••••••••••••••••••••••••••••••••••••••4
■Piping ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••5
■Wiring•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••13
Chapter 4. FUNCTIONS
■Display••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••15
■Flow rate display unit •••••••••••••••••••••••••••••••••••••••••••••••••••15
■Output (4 to 20 mA output models MCF_______D01____ only) ••••••16
■Integration function•••••••••••••••••••••••••••••••••••••••••••••••••••••16
■Event output ( 4 to 20 mA output models MCF_______D01____ only )•••16
■Event function ( RS-485 communications models MCF_______D10____ only ) •••17
■Operating pressure selection •••••••••••••••••••••••••••••••••••••••••••18
■Reference temperature selection •••••••••••••••••••••••••••••••••••••••18
■Low flow cutoff •••••••••••••••••••••••••••••••••••••••••••••••••••••••••18
■Self-diagnosis function •••••••••••••••••••••••••••••••••••••••••••••••••18
■Data storage ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••18
■Integration options for backflow ••••••••••••••••••••••••••••••••••••••••19
■Reverse flow measurement •••••••••••••••••••••••••••••••••••••••••••••20
■Expansion of flow rate range •••••••••••••••••••••••••••••••••••••••••••20

v
Chapter 5. SETTING AND OPERATION
■State transitions ••••••••••••••••••••••••••••••••••••••••••••••••••••••••21
■Function setup••••••••••••••••••••••••••••••••••••••••••••••••••••••••••22
■Parameter setup ••••••••••••••••••••••••••••••••••••••••••••••••••••••••25
■Device information display •••••••••••••••••••••••••••••••••••••••••••••29
■Other indications •••••••••••••••••••••••••••••••••••••••••••••••••••••••30
■Resetting integrated data •••••••••••••••••••••••••••••••••••••••••••••••30
■Maintenance mode••••••••••••••••••••••••••••••••••••••••••••••••••••••30
Chapter 6. MAINTENANCE AND TROUBLESHOOTING
■Maintenance ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••33
■Troubleshooting ••••••••••••••••••••••••••••••••••••••••••••••••••••••••35
Chapter 7. SPECIFICATIONS
■General specifications ••••••••••••••••••••••••••••••••••••••••••••••••••37
■Environmental conditions ••••••••••••••••••••••••••••••••••••••••••••••39
■External dimensions ••••••••••••••••••••••••••••••••••••••••••••••••••••40
■Pressure loss •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••43

Chapter 1. OVERVIEW
■Summary
The MCF air flowmeter uses a µF (Micro Flow) sensor in its sensing unit. The µF
sensor is a thermal flow speed sensor which uses proprietary technology.
Integrating this ultra-miniature flow speed sensor with high-grade channel design
technology has achieved high accuracy and wide rangeability.
■Features
•Incorporates a thermal flow speed Micro Flow sensor. With the silicon micro-
machining and the thin-film forming technologies, the µF sensor is a mere 1.7
mm square and 0.5 mm thick, and features high sensitivity and fast response.
•Because this device is a mass flowmeter, its readings are not affected by temper-
ature or pressure.
•The MCF with 4 to 20 mA output provides instantaneous flow rate and inte-
grated flow display, and provides analog current output for instantaneous flow
rate, as well as event outputs for integration pulse or alarms.
The MCF with RS-485 communications provides instantaneous flow rate, inte-
grated flow display and RS-485 communications function.
•A bypass structure using orifices affords a wider flow rate range per pipe size
than previous mass flowmeters, with low pressure loss.
•Dust tightness is improved by the bypass structure and flow path design.
•Self-diagnostic function for easy handling of malfunctions.
•Measurement module is detachable, so maintenance can be done without remov-
ing the flowmeter.
•Measurement module can be swapped between the MCF0250, MCF0400 and
MCF0500.
•Display unit can be rotated, for viewing from the desired direction.
mode
enter
ALEVLL/min
MCF
Measurement module
(MCF0250, MCF0400 and MCF0500 are interchangeable)
Display unit can be rotated and fixed at the desired angle.
Main flow path
Display unit
1

■Model selection guide
■Optional parts (sold separately)
Basic Pipe size Material Connected Gas type Power Option Option Option Design Description
model Flow rate /output/ (1) (2) (3) code
number range communications
MCF MCF Air flowmeter
0080 8A (1/4B), 200L/min, full scale
0150 15A (1/2B), 500L/min, full scale
0151 15A (1/2B), 1000L/min, full scale
0250 25A (1B), 3000L/min, full scale
0400
40A (1 1/2B), 3000L/min, full scale
0500 50A (2B), 12000L/min, full scale
ABody: aluminum alloy
Rubber: HNBR
FBody: aluminum alloy
(Degreasing treatment *1)
Rubber: FKM
RRc thread
GGthread
NAir/nitrogen
D01 24 Vdc power, 4 to 20 mA
output, one event output
D10 24 Vdc power, RS-485
0None
0None
. 0 None
D Inspection certificated provided
YWith traceability certification
0Product version
Name Model number Description
Mounting bracket 81446721-001 For MCF0080/0150/0151/0250
Measurement module 81447192-201 For MCF____A_ND01____ For MCF0250/0400/0500
81447192-221 For MCF____A_ND10____
81447192-401 For MCF____F_ND01____
81447192-421 For MCF____F_ND10____
2
Chapter 1. OVERVIEW
Name Model number Cable Cable Lead color
length properties
Cable with connector PA5-4ISX2MK-E 2m Oil resistant, bend-tolerant
exclusive for MCF PA5-4ISX3MK-E 3m Flame-resistant cable
series PA5-4ISX5MK-E 5m UL2464 1: Brown
EN-compliant 2: White
PA5-4ISX2HK-E 2m Oil resistant 3: Blue
PA5-4ISX3HK-E 3m Flame-resistant cable 4: Black
PA5-4ISX5HK-E 5m UL2464
EN-compliant
Extension cable with PA5-4ISB2MK-E 2m Oil resistant, bend-tolerant
connector PA5-4ISB3MK-E 3m Flame-resistant cable
PA5-4ISB5MK-E 5m UL2464
EN-compliant
PA5-4ISB2HK-E 2m Oil resistant,
PA5-4ISB3HK-E 3m Flame-resistant cable
PA5-4ISB5HK-E 5m UL2464
EN-compliant
*1. page 38

Chapter 2. PART NAMES AND FUNCTIONS
■Parts name and functions
Flow rate display: This 7-segment LED indicates instantaneous flow rate or inte-
grated flow amount. For the integrated flow, the first 4 digits
and last 5 digits are displayed separately. The 7-segment dis-
play also indicates settings in setting mode and alarm codes
when an alarm occurs.
LED lamp:
[L/min] Lights up while instantaneous flow rate is indicated.
[L] Lights up while integrated flow is indicated.
[EV] Synchronized with event output
[AL] Lights up when an alarm occurs
Keys:
[mode] Changes the display or switches to setting mode, etc.
[][] Increases/decreases the value of a setting, changes the display
mode, etc.
[enter] Used to finalize function settings and parameter settings
Main flow path: Connects to pipes. Inlet and outlet are marked.
Measurement module :Removable for maintenance. Can be changed with a new one
for the MCF0250, MCF0400 and MCF0500.
Display unit: Can be rotated in a plane parallel to the flow path. Rotates
180° clockwise and 90° counterclockwise, for viewing from
any direction.
Connector: Provides the power and signal connections.
Bolts: Fasten the measurement module in the main flow path.
Display unit
Connector
Outlet
Inlet
Measurement module
Flow rate display
Bolts
Main flow path
mode
enter
ALEVLL/min
MCF
3

Chapter 3. MOUNTING AND WIRING
4
■Installation location
Avoid mounting this device in places characterized by any of the following:
• Temperature below -10 °C or above 60 °C
• Humidity exceeding 90 % RH
• Sudden changes in temperature, or condensation
• Corrosive or flammable gases
• Heavy concentration of conductive substances (e.g. dust, salt or iron dust), water
droplets, oil mist or organic solvents
• Vibration or shock
• Direct sunlight
• Splashing by water or rain
• Splashing by fluids (e.g. oil, chemicals)
• Constant, heavy splashing by water or dust
• Strong magnetic or electrical fields
■Excessive flow rate
If the flow rate exceeds the maximum display range, alarm code AL40 is displayed
alternately with the flow rate. Be sure to use the device within the flow rate range
stated in the specifications.
WARNING
Never allow gases that are within explosive limits to pass through this device. Doing so could
result in an explosion.
Do not use this device for oxygen gas. Doing so could result in a serious accident.
CAUTION
Be sure to use this device within the flow rate range stated in the specifications. To prevent
excessive flow, use a suitable means to control the supply pressure or use a throttle valve or
the like to control the flow rate.
If damage could result from the abnormal functioning of this device, include appropriate
redundancy in the system design.
If there is a risk of a power surge caused by lightning, use Azbil Corporation's SurgeNon to
prevent possible fire or equipment failure.

5
■Piping
●MCF_ _ _ _ _R pipe installation cautions
• The MCF is a precision instrument. Do not drop it nor subject it to shock.
•Install so that the direction of gas flow matches the arrow on the side of the
MCF.
• Do not apply force to the measurement module during installation.
•When attaching the MCF to the pipe, fix the MCF in place and rotate the pipe to
the recommended tightening torque.
•Do not allow foreign matter to enter the MCF. If rust, water droplets, oil mist or
dust from the pipe enters the device, measurement, control error, or damage may
occur. Before installation, be sure to flush the upstream and downstream piping
thoroughly to remove welding fume particulate and dust.
•Coat with an appropriate amount of sealant, but do not coat the top two threads.
Doing so might cause measurement error or damage.
• When connecting a piping element such as a pipe with a different diameter, a
regulator, a filter, or a valve on the upstream side, use the recommended
straight pipe section. Failure to do so could cause a measuring error.
“Accuracy and straight pipe length” (page 9)
• If a reducer or tube fitting is connected without a straight pipe section, the dis-
play might indicate a negative flow rate even though air is flowing in the posi-
tive direction.
“Straight pipe section” refers to a straight pipe with the same diameter as the
MCF port. The following types of pipe are suitable: Carbon Steel Pipes for
Ordinary Piping (JIS G3452), ANSI schedule 40 or less; Carbon Steel Pipes
for Pressure Service (JIS G3454), or ANSI schedule 40 or less; Stainless Steel
Pipes (JIS G3459).
• Although there are no restrictions of mounting direction, if the MCF is mounted
on a horizontal pipe and the display faces to the side, a measuring error can be
caused by the mounting direction.
“Mounting direction” (page 7)
Also, if the unit is mounted on a horizontal pipe with the display facing down-
ward, foreign matter (rust, water droplets, oil mist, dust) in the pipes might accu-
mulate in the sensor, causing measuring error or damage.
•Do not install this device near the outlet of a compressor or bellows pipe, or in a
location where the regulator and the check valve cause a hunting phenomenon.
Doing so could cause measurement error.
Chapter 3. MOUNTING AND WIRING
Model Pipe Recommended tightening
number size torque [N•m]
MCF0080 1/4 inch 12 to 14
MCF0150 1/2 inch 31 to 33
MCF0151 1/2 inch 31 to 33
MCF0250 1 inch 36 to 38
MCF0400 1 1/2 inch 59 to 61
MCF0500 2 inch 74 to 76

6
●MCF _ _ _ _ _ G pipe installation cautions
• The MCF is a precision instrument. Do not drop it nor subject it to shock.
•Install so that the direction of gas flow matches the arrow on the side of the
MCF.
• Do not apply force to the measurement module during installation.
•Do not allow foreign matter to enter the MCF. If rust, water droplets, oil mist or
dust from the pipe enters the device, measurement error, control error, or dam-
age may occur. Before installation, be sure to flush upstream and downstream
piping thoroughly to remove foreign matter.
• Be sure to use the gasket between the pipe and the MCF.
•When connecting a piping element such as a pipe with a different diameter, a
regulator, a filter, or a valve on the upstream side, use the recommended straight
pipe section. Failure to do so could cause a measuring error.
•If a reducer or tube fitting is connected without a straight pipe section, the dis-
play might indicate a negative flow rate even though air is flowing in the posi-
tive direction.
“Straight pipe section” refers to a straight pipe with the same diameter as the
MCF port. The following types of pipe are suitable: Carbon Steel Pipes for
Ordinary Piping (JIS G3452), ANSI schedule 40 or less; Carbon Steel Pipes for
Pressure Service (JIS G3454), or ANSI schedule 40 or less; Stainless Steel Pipes
(JIS G3459).
•Although there are no restrictions of mounting direction, if the MCF is mounted
on a horizontal pipe and the display faces to the side, a measuring error can be
caused by the mounting direction.
Also, if the unit is mounted on a horizontal pipe with the display facing down-
ward, foreign matter (rust, water droplets, oil mist, dust) in the pipes might accu-
mulate in the sensor, causing measuring error or damage.
•Do not install this device near the outlet of a compressor or bellows pipe, or in a
location where the regulator or the check valve causes hunting. Doing so could
cause measurement error.
Chapter 3. MOUNTING AND WIRING

7
Chapter 3. MOUNTING AND WIRING
●Mounting direction
Normally the MCF is mounted on a horizontal pipe with the display unit facing
upward. Though the mounting position is unrestricted, measurement error might be
caused by the display direction.
Vertical pipe (Position 5)
Normal position on horizontal pipe with display facing upward (Position 1)
Horizontal pipe with display rotated to the right as seen from air inlet (Position 2)
Horizontal pipe with display rotated to the left as seen from air inlet (Position 3)
Flow direction
Flow direction
Side view
Flow direction
Flow direction
Flow direction
Side view
View from the air inlet
Side view
View from the air inlet
mode
enter
ALEVLL/min
MCF
mode
enter
ALEVLL/min
MCF
mode
enter
ALEVLL/min
MCF
Horizontal pipe with display facing downward (Position 4)
Side view
Flow direction

•Horizontal pipe with the display facing right as seen from the air inlet (Position 2)
Example: When the MCF is mounted on horizontal piping with the display unit
facing to the right as seen from the air inlet, the instantaneous flow
rate deviation is 1.5 %FS ±1 digit or less as compared with the accura-
cy in the normal position at 0.3MPa.
0.5 %FS / 0.1 MPa ✕0.3 MPa = 1.5 %FS
Note: Maintenance mode settings table (page 31, for error correction)
•Horizontal pipe with the display facing left as seen from the air inlet (Position 3)
Example: When the MCF is mounted a horizontal piping and the display unit
looks to the left from the air inlet, the instantaneous flow rate devia-
tion is -1.5 %FS ±1 digit or less as compared with the accuracy in the
normal position at 0.3MPa.
-0.5 %FS / 0.1MPa ✕0.3 MPa = -1.5 %FS
Note: Maintenance mode settings table (page 31, for error correction)
Handling Precautions
•When the MCF is mounted on horizontal piping with the display facing to
the right or left side as seen from the air inlet, we recommend setting the
low flow cutoff at 5 (±5 % of the full scale flow rate) or less. If no low flow
cutoff is set, the integrated value might accumulate even without an air
flow.
•Horizontal pipe with the display facing downward and vertical pipe (Positions 4, 5)
The characteristics of the MCF do not change as compared with the normal posi-
tion. However, if the MCF is mounted on horizontal piping with the display unit
downward, accuracy might decrease due to accumulated moisture, mist or dust
from the air.
●Filter
•If there is a possibility of foreign matter entering the device, install a filter,
strainer or mist trap upstream capable of eliminating foreign matter larger than
1 µm in diameter.
• If an oil mist can be expected frequently, be sure to install a mist separator.
Model number: MFF25S / MFF25L
Specifications sheet No. CP-SS-1824E
• Inspect and replace the filter periodically.
8
Chapter 3. MOUNTING AND WIRING
Operating pressure range
Flow rate range Instantaneous flow rate deviation
0 to 1 MPa5to 100 % of full scale flow rate 0.5 %FS per 0.1MPa ±1 digit or less
-0.07 to 0 MPa 5 to 100 % of full scale flow rate 0.5 %FS per 0.01MPa ±1 digit or less
Operating pressure range Flow rate range Instantaneous flow rate deviation
0 to 1 MPa5to 100 % of full scale flow rate -0.5 %FS per 0.1MPa ±1 digit or less
-0.07 to 0 MPa 5 to 100 % of full scale flow rate -0.5 %FS per 0.01MPa ±1 digit or less

9
Chapter 3. MOUNTING AND WIRING
●Accuracy and straight pipe length
• Connection with different size piping, valve or filter
Install straight pipes as needed with the lengths given in the table below.
If a device that is not listed in the table is installed either upstream or downstream,
contact the azbil Group for the length of the straight pipe section.
If reverse flow is also expected, it is necessary to have the same length of straight
pipe downstream as upstream.
Note 1: Do not connect a carbon steel pipe for pressure service (JIS G3454) or stainless steel pipe (JIS
G3459) that is larger than schedule 40. Doing so might cause a deterioration of accuracy. (If the
pipe schedule number is larger, the inner pipe diameter is smaller, resulting in reduced accuracy.)
Pipe or connected device Location in Straight pipe section for this device
relation to For accuracy within For accuracy
the MCF specifications (±3 % FS) within ±5 % FS
MFF25S mist separator for MCF0080/0150/ Upstream 10D (Not required)
0151/0250 (Note 3)
MFF25L mist separator for MCF0400/0500 Upstream 20D (Not required)
(Note 3)
Pipe one size larger in dia. Upstream 5D (Not required)
(connected with reducer) (Note 4, 5)
MCF0080 3/8 inch→1/4 inch
MCF0150/0151 3/4 inch→1/2 inch Downstream (Not required) (Not required)
MCF0250 1 1/4 inch→1 inch
MCF0400 2 inch→1 1/2 inch
Pipe one size larger in dia. Upstream 10D 5D
(connected with reducer) (Note 4, 5)
MCF0500 2 1/2 inch→2 inch Downstream 5D 5D
Pipe one size smaller in dia. Upstream 20D 5D
(connected with enlarging pipe) (Note 4, 6)
MCF0080 1/8 inch→1/4 inch
MCF0150/0151 3/8 inch→1/2 inch Downstream (Not required) (Not required)
MCF0250 3/4 inch→1 inch
MCF0400 1 1/4 inch→1 1/2 inch
Pipe more than one size smaller in dia. Upstream 25D 10D
(connected with enlarging pipe) (Note 4, 6)
MCF0500 1 1/2 inch→2 inch Downstream 5D 5D
Single elbow Upstream 10D (Not required)
(Note 7) Downstream (Not required) (Not required)
Double elbow Upstream 10D 10D
(Note 7) Downstream (Not required) (Not required)
Ball valve (full-bore type full open) Upstream (Not required) (Not required)
(Note 8) Downstream (Not required) (Not required)
Regulator for MCF0080 Upstream 200D (Not required)
(Note 9) Downstream 10D (Not required)
Regulator for MCF0150/0151/0250/0400/ Upstream 30D (Not required)
0500 (Note 9) Downstream 5D (Not required)
Air filter Upstream 25D (Not required)

Note 2: The approximate size of the connection port (D) is 8 mm for the MCF0080 (1/4 inch), 15 mm for the
MCF0150/0151 (1/2 inch), 25 mm for the MCF0250 (1 inch), 40 mm for the MCF0400 (1 1/2 inch),
and 50 mm for the MCF0500 (2 inch).
Note 3: The straight pipe section lengths given in the right-hand columns above are for connection of a filter
the same size (internal diameter) as the MCF.
Note 4: MCF models and connecting pipe sizes are shown below.
▲Pipe one size smaller than the MCF
●Pipe the same size as the MCF
+Pipe one size larger than the MCF
Note 5: The figure below shows an example of the MCF0080 connected with a reducer. The accuracy is
within the specification range (±3 %FS).
When connecting the MCF to a pipe 1 size larger than the MCF port (for example, the MCF0080 to
a 1/2 inch pipe), to determine the straight pipe length, use the section of the table marked “Pipe one
size larger in dia. (connected with reducer).”
Note 6: The figure below shows an example of the MCF0150 connected with an enlarging pipe. The accu-
racy is within the specification range (±3 %FS).
Do not connect a smaller size pipe to the MCF without a straight pipe section. Doing so might cause
a reverse flow in the measurement module, even though there is a regular forward flow in the main
flow path. Therefore the display might indicate a negative value or an extremely low flow rate com-
pared with the actual rate.
MCF0150
1/2 inch
3/8 inch
20D
3/8 inch
MCF0080
3/8 inch 1/4 inch 3/8 inch
5D
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Chapter 3. MOUNTING AND WIRING
Model No./Pipe size 1/8 inch 1/4 inch 3/8 inch 1/2 inch 3/4 inch
MCF0080 ▲● +
MCF0150/0151 ▲● +
Model No./Pipe size 3/4 inch 1 inch 1 1/4 inch 1 1/2 inch 2 inch 2 1/2 inch
MCF0250 ▲● +
MCF0400 ▲● +
MCF0500 ▲● +

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Chapter 3. MOUNTING AND WIRING
When connecting the MCF to a pipe 1 size smaller than the MFC port (for example, the MFC0150 to
a 1/4 inch pipe), to determine the straight pipe length use the section of the table marked “Pipe one
size smaller in dia. (connected with reducer).” In addition, on the upstream side add 5D to the
straight pipe length.
* The specified length is the straight pipe length when connecting a pipe one size smaller than the
MCF.
Note 7: The figures below show examples of connection with a single elbow and double elbow.
Note 8: This valve does not have an internal throttle. If possible, install a flow regulating valve downstream
from the MCF.
Note 9: A regulator should be 200D away from this device. The pipe from the regulator to this device may be
consist of an air tube and elbow. However, if the elbow is connected to this device, use the neces-
sary straight pipe section for the elbow.
mode
enter
ALEVLL/min
MCF
Regulator Elbow
MCF0080 (1/4 inch)
Straight pipe section (1/4 inch)
10D or more
Distance from this
device to the
regulator:
200D or more.
For other models,
30D or more.
10D
10D
Single elbow Double elbow (S-bend)
MCF0150
1/2 inch
1/4 inch
25D
1/4 inch

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Chapter 3. MOUNTING AND WIRING
• Rotation of display unit
The display unit can be rotated 90˚counterclockwise and 180˚clock wise from the
state of factory shipment (see the figure shown below).
clockwise
counterclockwise