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 －－－－－