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Aichi Tokei Denki AS Series Handling Manual

Ultrasonic flowmeter for fuel gas and factory air
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Sep, 2020
Ultrasonic Flowmeter for Fuel Gas
and Factory Air
AS-WW
Handling Manual

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  • Page 1 Sep, 2020 Ultrasonic Flowmeter for Fuel Gas and Factory Air AS-WW Handling Manual...

  • Page 2: Table Of Contents

    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.

  • Page 3: Model

    ○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...

  • Page 4: Important Notice

    ○ 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 Indicates that death or serious injury is imminent if you do not observe the precaution with this symbol.
  • Page 5 Operating environment and Measurable fluid 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). Caution 3.
  • Page 6 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 Caution flowmeter. Storage 1. Store the flowmeter away from fire and direct sunlight. 2.

  • Page 7: Introduction

    1. Introduction 1-1. Checking Supplied Items Upon delivery of the product, check that the following items are contained. Name Note Ultrasonic flowmeter See Page 20 for how to use them. Supplied with the flange type. Centering collar ( 6 models from AS-WW-40 ~ 200, excluding AS-WW-25 and AS-WW-32) Used to tighten the set screw to change the display unit M4 hexagonal wrench...

  • Page 8: Flow Of Startup Operation

    Figure 1-1. Part Names of Operation and Display Portions Rear slant view Rear right button (SW2) Rear left button (SW1) Rear left button (SW1) Rear center button (SW3) Rear right button (SW2) Pilot lamp Main display (upper line) For AS-WW-200 Subdisplay (lower line) 1-3.

  • Page 9: Activation

    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.
  • Page 10 factory Classification 1 Classification 2 Classification 3 Setting Range defaults Item 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 0.000～1.000 0.000 0.000～1.000...

  • Page 11: Configuration Change Procedure

    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. Ｆ０...
  • Page 12 Ｆ１－２ Related to pressure measurement Ｆ１－３ Related to SW1+SW2 Compressibility Factor Configuration long pressing SW1 １．０００ compressibility SW1：Change digit for setting long pressing SW2 SW1+SW2 factor fixed value SW2：Increment the setting value SW1+SW2 Configuration ０．８００ SW1：Change digit for setting SW1+SW2 SW2：Increment the setting value SW1+SW2 Configuration...
  • Page 13 SW1+SW2 Configuration ０．０００ SW1：Change digit for setting SW1+SW2 SW2：Increment the setting value SW1+SW2 Configuration ０．０００ SW1：Change digit for setting SW1+SW2 SW2：Increment the setting value SW1+SW2 Configuration ０．０００ SW1：Change digit for setting SW1+SW2 SW2：Increment the setting value SW1+SW2 Configuration ０．０００ SW1：Change digit for setting SW1+SW2 SW2：Increment the setting value SW1+SW2...

  • Page 14: Details Of Configuration Items

    Ｆ３ Output Ｆ３－１ Related to SW1+SW2 Configuration Flowrate pulse output Actual flow Convertional flow Pulse output flow SW1+SW2 value selection SW1+SW2 Configuration １０００Ｌ／Ｐ Unit pulse SW1+SW2 output units Maintenance SW1+SW2 Configuration ｄｕｔｙ １０００ｍｓ Pulse output ON SW1+SW2 width Ｆ３－２ Related to Communication SW1+SW2 Configuration...
  • Page 15 ●[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),”...
  • Page 16 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".
  • Page 17 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%].

  • Page 18: Installation

    4. Installation It is recommended to perform configuration of the flowmeter (3. Configuration) and adjustment of the display orientation (4. Installation) before 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.
  • Page 19 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) Down stream Conditions Upstream...
  • Page 20 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.
  • Page 21 4) Install the flowmeter so that the center axis of the flowmeter is aligned with the center axis of the pipe. Be sure to use the supplied centering collars to minimize misalignment between the flowmeter and the center axis of the pipe. Measurement accuracy is not guaranteed without the usage of centering collars.
  • Page 22 8) The display portion can be rotated. It is recommended to rotate the display portion before installing the flowmeter. To change the orientation of the display portion, loosen the set screw at the neck below the display portion with the hexagonal wrench, and rotate the display portion. Once the display portion is rotated in the desired orientation, be sure to tighten the set screw to fix the display portion.

  • Page 23: Wiring

    5. Wiring Connect the optional external connection cable as shown below. White Flow pulse output Connector Yellow Communication (+) RS485 power supply Green Not available Brown Communication (-) Blue Not available Black Figure 5-1. External connection cable wiring diagram ･Body and GND are electrically common. Use an isolated power supply and indicator as necessary.

  • Page 24: Operation

    6. Operation 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. When starting operation, gradually open the valve and confirm that the pilot lamp blinks. (Blinking of the pilot lamp indicates that fluid is flowing.) (AS-WW- 25, 32, 40, 50, 80) (AS-WW-100, 150, 200)
  • Page 25 Figure7-2 Button operation during measurement mode and switching flow for various modes B. Functions in each mode 1) Measurement mode (normal mode) ・Main display contents (upper line) Converted forward accumulated value (Nm Actual forward accumulated value(m ・ Sub display contents (lower line) Automatically toggles between the items below at an interval of four seconds depending on the flowconversion selection (converted flow or actual flow).

  • Page 26: Error Display And Output

    8. Error Display and Output 8-1. Ultrasonic measurement failure [Status] Ultrasonic measurement fails. [Indication] ALARM1 at the upper left of the LCD turns on. The accumulated flow volume remains at the last value before detecting abnormality and accumulation stops.Instantaneous flow display shows "0.00". (AS-WW- 25, 32, 40, 50, 80) (AS-WW-100, 150, 200) [Output] Flow pulse output: Stopped...
  • Page 27 8-3. Pressure abnormal value [Status] Pressure sensor failure [Indication] Instantaneous flow display shows "0" and the pressure display shows the detected abnormal value. (The temperature display remains on.) The accumulated flow volume on the main display remains at the last value before detecting abnormality and accumulation stops.
  • Page 28 8-4 Abnormal temperature [Status] Temperature sensor failure [Indication] Instantaneous flow display shows "0.00" and the temperature display shows the detected abnormal value (blinking).(The pressure display remains on.) The accumulated flow volume on the main display remains at the last value before detectingabnormality and accumulation stops.

  • Page 29: Specifications

    9. Specifications AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- Model Nominal diameter 100A 150A 200A Built-in lithium battery, battery life 7 years (at surrounding temperature of 20℃) Power supply (Excluding 1 year of storage period) Measurable fluids Natural gas, air Pressure sensor A: Absolute pressure sensor 0.07～0.5MPa(AS-WW-...
  • Page 30 AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- AS-WW- Model Communicatio RS485 MODBUS/RTU External power +9~ +26.4VDC (+9 to 15.9V under explosion-proof environment) supply Rated -9~+9VDC Output voltage Nch open drain output Contact output 1: Unit pulse (forward flow), pulse output unit: 100, 1000, 10000 L/P or NL/P Maximum rated voltage: +24VDC Contact output Maximum rated current: 10mA...
  • Page 31 Table 9-1 Working pressure corresponding to methane concentration Size Methane concentration (%) Working Pressure (absolute) 99%～100% 250kPa or higher 200Ａ 97%～99% 150kPa or higher 97% or lower No restriction 98%～100% 100kPa 以上 150Ａ 98% or lower No restriction * No restriction for the 100A or smaller models. Table 9-2.

  • Page 32: External View

    10. External View 25A , 32 A 40A - 80A 100A - 200A Figure 10-1. External View Width Model Height [mm] [mm] AS-WW-25-[sensor type]BA/4 AS-WW-32-[sensor type]BA/4 AS-WW-40-[sensor type]BA/4 AS-WW-50-[sensor type]BA/4 AS-WW-80-[sensor type]BA/4 AS-WW-100-[sensor type]BA/4 AS-WW-150-[sensor type]BA/4 AS-WW-200-[sensor type]BA/4 11. Battery Life The built-in battery life is 7 years.

  • Page 33: Troubleshooting

    12. Troubleshooting Timing Phenomenon Possible cause Counteraction Fluid other than specified is used. Flowmeter is used outside the Observe the precautions in "For Safe Use of the Product" specification range (e.g., installation, (Pages 3 to 5) and the specifications (Pages 29 and 30). pressure, and/or temperature conditions are out of the specification).

  • Page 34: Warranty And After-Sales Service

    Whether the warranty applies or not, explain the defect as detailed as possible to us, including the product name, model (AS-WW), construction number, manufacturing number, and presence of options. Aichi Tokei Denki Co., Ltd. 1-2-70 Chitose, Atsuta-ku, Nagoya, Aichi Prefecture 456-8691 JAPAN URL:https://www.aichitokei.co.jp For questions, please contact.

This manual is also suitable for:

As-wwAs-ww-25As-ww-32As-ww-40As-ww-50As-ww-80 ... Show all

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