Aichi Tokei Denki AS Series User manual

Sep, 2020
Ultrasonic Flowmeter for Fuel Gas
and Factory Air
AS-WW
Handling Manual

1
Ultrasonic Flowmeter for Fuel Gas and Factory Air AS Series
Handling Manual
●Table of Contents
○Preface/Request and Notice
○Product Overview
○Model········································································································· 2
○Important Notice ························································································· 3
○For Safe Use of the Product ········································································· 3
1. Introduction ······························································································ 6
1-1. Checking Supplied Items
1-2. Name of each part
1-3. Flow of startup operation
2. Activation ································································································· 8
3. Configuration···························································································· 8
3-1. Standard Factory defaults
3-2. Configuration change procedure
3-3. Details of configuration items
4. Installation·······························································································17
5. Wiring ·····································································································22
6. Operation·································································································23
7. Operation of Display Portion······································································23
8. Error Display and Output···········································································25
9. Specifications ··························································································28
10. External View ·························································································31
11. Battery Life·····························································································31
12. Troubleshooting ·····················································································32
・Warranty and After-Sales Service ··················································· Back Cover
○Preface/Request and Notice
Thank you very much for purchasing our ultrasonic flowmeter for fuel gas and factory airAS-WW.
Be sure to read this manual thoroughly in order to use it correctly and prevent an accident.
This manual is also necessary for maintenance. Be sure to keep it until you dispose of the flowmeter.

2
○Product Overview
This product is an ultrasonic flowmeter for fuel gas and factory air and capable of flow volume
measurement of fuel gas and air at the atmospheric pressure to 1 MPa abs or less. Installation is done
by screwing with taper screw or tightening with flanges.
・Screw type (taper screw)models:AS-WW-25, AS-WW-32
・Flange type models:AS-WW-40, AS-WW-50, AS-WW-80, AS-WW-100, AS-WW-150, AS-WW-200
○Model
The models are classified as follows according to the nominal diameter and working pressure.
AS-WW-[nominal diameter]-[pressure sensor specification] BA/4
[Nominal diameter]
25A: 25 32A: 32
40A: 40 50A: 50 80A: 80
100A: 100 150A: 150 200A: 200
[pressure sensor specification]
No pressure sensor: 0 (For all nominal diameters)
With 0.2MPa pressure sensor*: 200 (For all nominal diameters)
With 0.5MPa pressure sensor*: 500 (For all nominal diameters)
With 1.0MPa pressure sensor*: 1000 (For 40Ato 200A)
B:[Built-in battery model]
A:Absolute pressure sensor
4:Version

3
○Important Notice
For safe use of the product and to prevent a failure and unexpected situation,
this manual uses the safety indications listed below.
Safety indications
Danger
Indicates that death or serious injury is imminent if you do not observe the
precaution with this symbol.
Warning
Indicates that death or serious injury is likely if you do not observe the precaution
with this symbol.
Caution
Indicates that an injury or physical damage (fault of the flowmeter) is likely if you
do not observe the precaution with this symbol.
This symbol indicates that if you make a mistake in handling, an accident can
occur.
This symbol indicates an inhibited action.
This symbol indicates a precaution you must observe.
○For Safe Use of the Product
Notes on use
Danger
1. Do not use the flowmeter for a purpose which requires safety including, but
not limited to, atomic power, railroad, aviation, vehicle, or playground
equipment.
2. Do not alter the flowmeter.
3. Do not use the product in the atmosphere of an inflammable gas, etc.,
because it is not of explosion-proof specifications

4
Operating environment and Measurable fluid
Caution
1. Do not use any other gas than fuel gas and air.
2. Observe the temperature and humidity ranges (-20 to +40°C, 90%RH or
lower) and pressure range (0.07Mpa to 1.0MPa abs or less).
3.Avoid usage in an ambient containing corrosive gas (chlorine, hydrogen
sulfide, etc.) and/or for an application to fluid containing corrosive gas.
4. The flowmeter is not waterproof (IP64). Do not install the flowmeter at a place
where it can be submerged.
5. Install the flowmeter as far away as possible from electrical noise sources. If
i
t should be necessary to install the flowmeter near an electrical noise source,
ground the shield of the external connection cable.
6. When the flowmeter is installed at a place where it is exposed to direct
sunlight,it is recommended to install a sunshade.
7. Ultrasonic measurement may become unavailable due to relation between
methane concentration and working pressure value. Observe working
pressure condition for the following methane concentration.
Nominal diameter Methane concentration Working Pressure (absolute)
200Ａ
99%～100% 250kPa or higher
97%～99% 150kPa or higher
97% or lower No restriction
150Ａ98%～100% 100kPa or higher
98% or lower No restriction
* No restriction for the 100A and smaller models.
Operation
Warning
1. Do not install the flowmeter on a footstep or do not get on it.
2. Do not hold the flowmeter with its display portion.
Hold the flowmeter with the portions shown in the figure below since it is a
precision instrument.
3. Do not press the glass portion.
○
Correct
×
×
Incorrect
Incorrect
○
Correct
Incorrect
×

5
Caution
1. Open or close the valve slowly.
Rapidly opening or closing the valve when there is a pressure difference
between the upstream and downstream sides of the valve may damage the
flowmeter.
Storage
Caution
1. Store the flowmeter away from fire and direct sunlight.
2. Keep the flowmeter away from combustible, inflammable, and/or heating
materials.
3. Store the flowmeter in a place where the surrounding temperature is -25 to
+70°C with no dewing.
Piping
Caution
1. Install an object which disturbs the flow (e.g., flow regulating valve)
atthedownstream side of the flowmeter.
2. For a new piping system, thoroughly wash it before installation.
3. Vertical piping is recommended when a large amount of mist and dust is
contained in the fluid. For horizontal piping, be sure to install the flowmeter so
that the display portion faces up.
4. Do not install the flowmeter where a strong compression or tension force
isapplied to it.
5. Lay pipes in accordance with the flow direction indicated on the flowmeter.
6. Do not drop, hit, or apply an excessive impact to the flowmeter.
7. When rotating the display portion, do not apply a force in any other
directionthan the rotation direction.
8. Do not touch the ultrasonic sensor.
Wiring
Danger
1. Observe the instructions given in this manual for wiring.
2. Observe the rated range. Do not use the flowmeter under a voltage
exceeding the rated load.
Caution
1. Keep the cables away from the power and motor cable.
2. Do not apply an excessive tension to the external connection cables.
3. Be careful so that the tip of an external connection cable is submerged
duringthe wiring work.
4. When connecting the power cable to an external power supply, be sure to
prevent a short-circuit. Use an external power supply with a short-circuit
prevention function.
5. Turn off the external power supply at the time of wiring.
6. Do not perform operation and wiring work with wet hands.
Disassembly and inspection
Caution
1. Do not disassemble the flowmeter.
2. Presence of fluid flow wakes a pilot lamp blink in a normal state If it does
notblink, contact us.
3. When a large amount of mist and dust is contained in the fluid, regularly
remove the flowmeter and check and clean foreign substances as necessary
the inside for.
Remove the flowmeter from the pipe, cover one of the connection port, and
then wash the inside with water or spindle oil. (For details, refer to "ALARM1
turns on" in "After deployment" in "11. Troubleshooting".)
Do not touch the ultrasonic sensor during inspection.
Disposal
Warning
1. Since this product contains lithium batteries it cannot be disposed as
domestic waste.
2. Never throw the flowmeter into fire. Combustion or explosion may occur.

6
1. Introduction
1-1. Checking Supplied Items
Upon delivery of the product, check that the following items are contained.
Name # Note
Ultrasonic flowmeter 1
Centering collar 2
See Page 20 for how to use them. Supplied with the flange type.
( 6 models from AS-WW-40 ~ 200, excluding AS-WW-25 and
AS-WW-32)
M4 hexagonal wrench 1 Used to tighten the set screw to change the display unit
orientation as well as to push the rear center button (SW3).
Handling Manual (this
book) 1
1-2. Name of each part
M4 hex wrench
Handling Manual
(this book)
Centering
collar
External output
harness
Configuration
buttons
Display
portion
Warning label
Body
casing
Specification
plate
Set screw
Ultrasonic sensor
Upper four digits of
Ser. No. indicate
prod
uction date
Incorrect
Warning Label

7
Figure 1-1. Part Names of Operation and Display Portions
1-3. Flow of startup operation
The basic flow to start operating is as follows:
While you can configure the flowmeter after installation, it is recommended to configure it before
installation.
Activation
To prevent the built-in battery from running out, measurement mode was
suspended when shipped from factory. Please use the flowmeter after
activation.
Setting
You can configure items related to measurement, output, and communications.
The factory settings are applied to the product when shipped from the factory,
and you can use it without any configuration.
To customize configuration in according to customer’s operational
circumstances, refer to "3. Configuration".
Installation
Refer to the recommended conditions and notes on piping in "4. Installation".
Be sure to read them since improper piping may hinder correct measurement.
Wiring
Refer to the notes on wiring between the RS485 power supply and receiver.
Be sure to read them to use the flowmeter correctly.
Operation
Refer to the notes on starting operation in "6. Operation".
Rear slant view
Rear right button (SW2)
Rear left button (SW1)
Rear center button (SW3)
Rear right button (SW2)
Main display (upper line)
Subdisplay (lower line)
For AS-WW-200
Rear left button (SW1)
Pilot lamp
Activation
(Setting)
Installation
Wiring
Operation

8
2. Activation
To prevent the built-in battery from running out, measurement mode was suspended when
shipped from factory. The LCD indication is blank when opened the package. Pressing the back
central button (SW3) makes the LCD be illuminated and measurement be started.
Use the enclosed hexagonal wrench or similar tool to press SW3. Do not press it with a sharp tip to
avoid any damage.
3. Configuration
3-1. Standard Factory defaults
You can configure items related to measurement, output, and communications with this flowmeter.
(Table 3-1)
The factory defaults are applied to the product when shipped from the factory. You can use it without
any configuration.
To change the factory defaults, refer to "3-2 Configuration changing procedure".
Table 3-1. Configuration items and standard factory defaults
Classification 1 Classification 2 Classification 3 Setting Range factory
defaults
No. Item No. Item Item
F0 Software
version －－－－－
F1 Measurement F1-1 Related to
flow measurement Gas type G-1：AIR
G-2：Natural Gas G-2
Maintenance －－
Selection for the indicated
accumulated flow volume
Act：Forward actual accumulated flow volume
Std：Forward accumulated conversion flow volume Std
Instantaneous flow moving average
count
1 to 16 [times] 4
Conversion reference temperature -10.0～+60.0[℃] 20.0
Conversion reference pressure 0.00～10.00[kPa] 0.00
F1-2
Related to
pressure
measurement
Enable/disable working
pressure setting OFF: Disabled, ON: Enabled
0B
：
ON
200B、
500B、
1000B：
OFF
Working pressure 0.0～1000.0[kPa]
0BA：
101.3
0BA 以
外：0.0
Pressure value moving
average count 1 to 4[times] 1
F1-3 Related to
Compressibility
Factor
compressibility
factor fixed value 0.800～1.200
0.000：Disable the fixed value setting 1.000
CH4 0.000～1.000 0.800
N2 0.000～1.000 0.000
CO2 0.000～1.000 0.000
C2H6 0.000～1.000 0.200
C3H8 0.000～1.000 0.000

9
Classification 1 Classification 2 Classification 3 Setting Range factory
defaults
No. Item No. Item Item
i-C4H10 0.000～1.000 0.000
C4H10 0.000～1.000 0.000
i-C5H12 0.000～1.000 0.000
C5H12 0.000～1.000 0.000
C6H14 0.000～1.000 0.000
C7H16 0.000～1.000 0.000
C8H18 0.000～1.000 0.000
C9H20 0.000～1.000 0.000
C10H22 0.000～1.000 0.000
H2 0.000～1.000 0.000
O2 0.000～1.000 0.000
CO 0.000～1.000 0.000
H2O 0.000～1.000 0.000
H2S 0.000～1.000 0.000
He(Helium) 0.000～1.000 0.000
Ar(Argon) 0.000～1.000 0.000
F2 Maintenance －Maintenance Maintenance －－
F3 Output F3-1 Related to
Flowrate
pulse output
Pulse output flow
value selection
Act：real flowrate
Std：conversion flowrate Std
Unit pulse output units 100,1000,10000[L] 1000
Maintenance －－
Pulse output ON width 50,125,250,500,1000[ms]
duty duty
F3-2 Related to
Communication Communication bit rate 4800,9600[bps] 4800
RTU address 000～255 001
F4 Maintenance －Maintenance Maintenance －－
F5 Maintenance －Maintenance Maintenance －－
－Blank －－－－－

10
3-2. Configuration change procedure
Refer to the display switching flow (Figure 3-1) and use the buttons to change configuration.
Use the enclosed hexagonal wrench or similar tool to press SW3. Do not press it with a sharp tip to
avoid any damage.
Configuration
SW1
SW1
SW1
SW2
SW2
SW1+SW2
SW2
SW1
SW2
long pressing SW1
SW2
SW1
SW2
1000
Ｆ０ Maintenance
Ｆ１ Measurement
Ｆ１－１ Re lated t o flow
measurement
SW1
SW1
Gas type
Maintenance
Configuration
Selection for the
indicated
accumulated flow
volume
SW1
SW1
Configuration
Instantaneous
flow moving
average count
SW1
SW2
SW1：Change the setting value
Configuration
Conversion
reference
temperature
※The most significant digit is
for change of +/-sign
０： Positive
－：Negative
Configuration
Conversion
reference pressure
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1+SW2
SW1
SW2
SW1
SW2
Ｆ１－２ Related to
pressure measurement
Configuration
Enable/dis able
working press ure
setting
SW1
SW1
SW1+SW2
SW1+SW2
Configuration
Working pressure
in normal mode
SW1+SW2
SW1+SW2
ＡＩＲ
ＮＧ
Std：Forward accumulated
convers ion fl ow volume
Act：Forward actual
accumulated flow vol ume
４times
＋１０．０℃
１０．００ｋＰａ
enable
disable
１０．００ｋＰａ
SW1
Configuration
Pressure value
moving average
count
SW1+SW2
SW1+SW2
１time
SW2
SW1
SW2
SW1
SW2
SW1
SW2
SW2
SW1
SW2
Ｆ１－３ Related to
Compressibility Factor
SW1
Ｆ２ Maintenance
SW1
long pressing SW2
long pressing SW1
long pressing SW2
long pressing SW1
long pressing SW2
SW1：Change the set-up digit
SW1：Cha nge digi t for s etti ng
SW2：Increment the s etting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value※
Figure.3－1Indication switching flow（1／4）

11
Ｆ１－３ Related to
Compressibility Factor Configuration
compressibility
factor fixed value
SW1+SW2
SW1+SW2
１．０００
SW1
SW2
Configuration
CH4
SW1+SW2
SW1+SW2
０．８００
SW1
SW2
Configuration
N2
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
CO2
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C2H6
SW1+SW2
SW1+SW2
０．２００
SW1
SW2
Configuration
C3H8
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
i-C4H10
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C4H10
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
i-C5H12
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C5H12
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C6H14
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
SW2
SW1
SW2
Ｆ１－２ Related to
pressure measurement
SW1
SW2
SW1
C7H16
long pressing SW1
long pressing SW2
SW1：Change digit for setting
SW2：Increment the setting value
SW1
：
Change di git for setting
SW2：Increment the s etting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change the set-up digit
SW2：increment the set-up value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
Figure.3－1Indication switching flow（2／4）

12
Configuration
C
7
H
16
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C
8
H
18
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C
9
H
20
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
C
10
H
22
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
H
2
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
O
2
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
CO
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
H
2
O
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
H
2
S
SW1+SW2
SW1+SW2
０．０００
SW1
SW2
Configuration
He
SW1+SW2
SW1+SW2
０．０００
SW1
Configuration
Ar
SW1+SW2
SW1+SW2
０．０００
C
6
H
14
SW1
SW2
SW1
SW2
SW2
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
SW1：Change digit for setting
SW2：Increment the setting value
Figure.3－1Indication switching flow（3／4）

13
SW1
Ｆ３ Output Ｆ３－１ Related to
Flowrate pulse output
SW1
Pulse output flow
value selection
SW1+SW2
SW1+SW2
SW2
Configuration
SW1
SW1
Actual flow
Convertional flow
Configuration
Unit pulse
output units
SW1+SW2
SW1+SW2
１０００Ｌ／Ｐ
SW1
SW2
Maintenance
SW1
SW2
SW1
SW2
Configuration
Pulse output ON
width
SW1+SW2
SW1+SW2
１０００ｍｓ
ｄｕｔｙ
SW1
Ｆ３－２ Related to
Communication
SW1
SW1
Conmmunication bit
rate
SW1+SW2
SW1+SW2
Configuration
SW1
SW1
４８００ｂｐｓ
９６００ｂｐｓ
SW1
SW2
SW1
SW2
Configuration
RTU address
SW1+SW2
SW1+SW2
００１
SW1
SW2
SW1
Blank
Figure.3－1Indication switching flow（4／4）
3-3. Details of configuration items
●[F1-1] Gas type
Choose the fluid type to use from "Air (G-1)" and "Natural Gas (G-2)".
The factory default is "Natural Gas (G-2)".
●[F1-1] Selection for the indicated accumulated flow volume
The forward accumulated flow volume indicated on the main LCD portion can be chosen from
「Actual flow (Act)」or 「Conversion flow (Std)」.
The factory default is "Std".

14
●[F1-1] Instantaneous flow moving average count
Choose the moving average count for displaying and outputting the instantaneous flow. The
default is 4 times and the most recent 4 times measurement values are used.
The moving average count in normal use does not require any charge, however, it is selectable
from "No moving average (01),” "2 times (02)", "3 times (03),” ... "14 times (14),” "15 times (15),”
and "16 times (16).”
●[F1-1] Conversion reference temperature
Choose the temperature used as the reference for flow conversion within the range from -10.0
to +60.0°C. The factory default is “20.0" (°C).
●[F1-1] Conversion reference pressure
Choose the pressure used as the reference for flow conversion within the range from 0.00 to
10.00 kPa (gauge pressure in increments of 0.01 kPa). The factory default is “0.00" (kPa).
● [F1-2] Enable/disable working pressure setting value
working pressure configuration value can be chosen from 「Enabled（on）」 or「Disabled（OFF）」.
The factory default for 0BA is "on", for 200BA、500BA、1000BA is “OFF”
●[F1-2] Working pressure in normal mode
Choose the working pressure in the normal mode within the range from "0.0kPa (0.0)" to
"1000.0kPa (1000.0)".
The factory default is "101.3kPa (101.3)" for 0BAand "0.0kPa (0.0)" for other models.
The set pressure is used when the above [F1-2] working pressure setting value is
set by “Enabled on".
●[F1-2] Pressure value moving average count
Choose the moving average count for pressure display from "Once (1)" to "4 times (4)"
Choosing "Once" disables moving average.
●[F1-3] Compressibility factor fixed value
Choose the compressibility factor fixed value from "0.800" to "1.200" and "0.000". When "0.800" to
"1.200" is set, this fixed value becomes effective and is used for flow conversion. When "0.000" is
set, this fixed value is no longer valid and the compressibility factor, calculated automatically by
inputting gas composition, is to be used for flow conversion. The factory default is "1.000".
●[F1-3] Gas composition
When the compressibility factor fixed value is set to invalid "0.000", use this “Gas composition”
function to calculate the compressibility factor by the meter internally. For the calculation, the
composition of the gas to be measured shall be inputted, and 21 kinds of different gas
composition can be inputted. (CH4, N2, CO2, C2H6, C3H8, H2O, H2S, H2, CO, O2, i-C4)
H10,n-C4H10, i-C5H12, n-C5H12, n-C6H14,n-C7H16,n-C(8H18,n-C9H20,n-C10H22,He,Ar)

15
The calculation formula is in correspondence with GB/T 17747.1-2011 and GB/T
17747.2-2011.The gas composition is set at a mole fraction of 0.000 to 1.000. The total gas
composition should be inputted to be 1.000.
When inputting the gas composition or when activation is performed, the system mode
automatically switches to "Compressibility factor calculation mode". Ultrasonic measurements and
outputs are discontinued during the “Compressibility factor calculation mode".After the
completion of the compressibility factor calculation, the system mode automatically switches to
the measurement mode. In case of the fixed value is inputted, the system mode does not switch
to "Compressibility factor calculation mode".
Figure.3－2Display at the time of “Compressibility factor calculation mode"
(a) When activation is performed （b）When setting gas composition by button operation
計測モード 圧 縮率因子演算モード 計測モード
(c) When setting gas composition by communication
●[F3-1] Pulse output flow value selection
Choose the pulse output flow value. The factory default is “Conversion flow (Std)". In the "actual
flow (Act)" mode, the output signal corresponds to the actual flow.
In the "conversion flow (Std)" mode, the output signal corresponds to the conversion flow.
Aconverted flow is calculated based on the temperaturet [°C] and/or pressure p[kPa] monitored
together with the flow.
Q2= Z × (T2/ (T1＋t)) × (p/P1) × Q1
Q2: Conversion flow [Nm3/h] Q1: Actual flow [m3/h]
Z: Compressibility factor T2:Absolute temperature of conversion reference temperature [K]
T1:Absolute temperature of 0°CT1=273.15[K] t: Fluid temperature [°C]
P1:Absolute pressure of conversion reference pressure [kPa abs]
p: Measurement pressure (absolute pressure) [kPa abs]
●[F3-1] Unit pulse output units
Choose from "10000", "1000", and "100" for the output pulse unit. (The unit is [L/P] or [NL/P].) It
is reflected on the output unit pulse of the contact output (unit pulse: forward flow).

16
The value range available for selection depends on the nominal diameter.
Table 2-2 lists the available selection range for each nominal diameter.
When the unit pulse output unit is changed, the width of the pulse output ON is automatically set
to [duty 50%]. Table 2-2.Available selection range
●[F3-1] Pulse Output ON Width
Choose from the duty method ("Duty 50% (----)") and one-shot method (pulse ON width
"50ms(50)", "125ms (125) ", "250ms (250)", "500ms (500)", and "1000ms (1000)" ). The
factory default is "Duty 50% (----)".
Available pulse output widths for selection depend on the selected output method and one-shot
pulse ON width. For details, refer to Table 2-2.
Also, when the unit pulse output unit is changed, it is automatically set to [Duty 50% (----)].
●[F3-2] Communication bit rate
Choose the communication bit rate from "4800" and "9600” (bps). The factory default is “4800".
●[F3-2] RTU address
Choose the address from "000" to "255". The factory default is “001".
●Maintenance setting
Do not alter this setting since it is intended for use by the maintenance personnel.
[One-short]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Pulse ON
width [ms]
[Duty 50%]
Nominal
diameter
Pulse output unit[L/P] / [NL/P]
Pulse ON
width [ms]
Pulse ON
width [ms]
Pulse output unit [L/P] / [NL/P]
Nominal
diameter

17
4. Installation
Notes on applied piping
This flowmeter guarantees the flow measurement accuracy with the pipes listed in Table 4-1.
(If you use a pipe with different pipe standard and size not listed in Table 3-1, the flowmeter may not
satisfy the flow measurement accuracy. Consult us in advance if it is considered to use different pipe
out of range.
As an example, Table 4-2 shows the piping standards and dimensions for the pipe inner diameter in
Table 4-1. Table 4-1 The recommended pipe inner diameter
Size
25
32
40
50
80
100
150
200
Pipe inner
diameter（mm）28.4
37.1 40.3 50 79.9 100 150 199.1
Connection
method
ISO7-1 Taper screw
connection (JIS B
0203,BS21,GB/T7306,2-2000)
equivalent
ISO7005-1 (GB/T9119-2000 PN1.6Mpa flange)equivalent
Table 4-2 Examples of piping standards and dimensions that satisfy the recommended pipe inner diameter
Pipe standard G3459 JIS 10K EN10208
Nominal
diameter（mm）25 32 40 50 80 100 150 200
External
diameter（mm）34 42.7 48.3 57 88.9 108 159 219.1
Thickness（mm）2.8 2.8 4 3.5 4.5 4 4.5 10
It is recommended to perform configuration of the flowmeter (3. Configuration) and
adjustment of the display orientation (4. Installation) before installation.

18
Notes on piping conditions
1)Align the arrow marked on the body with the forward flow direction of the fluid.
2)It is recommended to provide straight pipe length as illustrated in Figure 4-1 in accordance with
piping condition.
Figure 4-1. Recommended strait pipe length 1 (D: nominal diameter)
20D or longer
10D or longer
Screw type: 20D or longer
Flange type: 10D or longer
10D or longer
20D or longer
Down stream
Upstream
10D or longer
5D or longer
5D or longer
Narrowing
pipe
Enlarge
pipe
Joining
90°
elbow/full-
bore valve
fully
opened
Conditions

19
3) Since installing the flowmeter in the proximity of a reducing valve or flow regulating valve may cause
ultrasonic noises to be generated inside the pipe, be sure to strictly observe the “necessary straight
pipe length L” shown in Figure 4-2.
In particular, note that a strict restriction is applied when installing the flowmeter at the downstream
of a reducing valve. (Measurement can become unavailable if the necessary condition is not
met.)
(* When using an elbow, replace "necessary straight pipe length" with "necessary pipe length
(including curved pipe)".Also, be sure to provide 10D on straight pipe before the flowmeter.)
Necessary straight pipe length L (mm) = 10D +
Differential pressure (kPa) × D ×
Expected maximum
flow (m/s)
× (0.8) Number of
elbows
20 (m/s)
Figure 4-2. Recommended strait pipe length 2 (D: nominal diameter)
(When installing the flowmeter in the proximity of the reducing valve or flow regulating valve)
Example 1: DN50A, flow 10m/s, one elbowused
where
P1= 160kPa and P2 = 10kPa
500+(160-10)x50x10/20x0.8 = 3500mm
(70D)
Distance from pressure
reducing valve to
flowmeter (L)
Required straight pipe length (L)
* Min 10D
Pressure
reducing
valve
With elbow
(Elbows attenuate ultrasonic noises. If multiple
elbows are used,
the required length will be shorter.)
Distance from 90° elbow to
flowme
ter (L)
10D or longer
Example 1: DN50A, flow 10m/s, no elbow used
where P1= 25kPa and P2 = 5kPa
500+(25-5)x50x10/20 = 1000mm (20D)
Example 2: DN50A, flow 10m/s, no elbow used
where P1= 160kPa and P2 = 10kPa
500+(160-10)x50x10/20 = 4250mm (85D)
Pressure
reducing
valve
Without elbow
To install the meter downstream of a pressure reducing valve
20D or longer
Pressure
reducing
valve
Installing the flowmeter at upstream of a pressure reducing valve
※Screw type: 20D or longer