Alia AVF250 Series Operation Manual
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Alia AVF250 Series Operation Manual

Metal tube variable area flowmeter
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AVF250 Operation Manual
OP250.1.1.7Z.R8ENG
A L I A V A
®
Metal Tube Variable Area Flowmeter
Model AVF250 Series
Operation Manual
URL : http://www.alia-inc.com
ALIA TECHNOLOGY LLC
633 W. 5th Street, 26th Floor, Los Angeles, CA 90071, USA
e-mail : alia@alia-inc.com
■
OP250.1.1.7Z.R8ENG
TEL : +1 - 213 - 533 - 4139
FAX : +1 - 213 - 223 - 2317
1

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Summary of Contents for Alia AVF250 Series

  • Page 1 AVF250 Operation Manual OP250.1.1.7Z.R8ENG A L I A V A ® Metal Tube Variable Area Flowmeter Model AVF250 Series Operation Manual URL : http://www.alia-inc.com ALIA TECHNOLOGY LLC 633 W. 5th Street, 26th Floor, Los Angeles, CA 90071, USA e-mail : alia@alia-inc.com ■...

  • Page 2: Table Of Contents

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG Index 1. Overall Check -------------------------------------------------------------------------------------------------------------------------3 2. Measuring Principle -----------------------------------------------------------------------------------------------------------------3 3. Features --------------------------------------------------------------------------------------------------------------------------------4 4. Specification ---------------------------------------------------------------------------------------------------------------------------4 5. Dimensions and Pressure Loss --------------------------------------------------------------------------------------------------5 6. Installation------------------------------------------------------------------------------------------------------------------------------6 6.1 Scheme-------------------------------------------------------------------------------------------------------------------------6 6.2 Straight Pipe Requirement ------------------------------------------------------------------------------------------------7 7. Size Calculation ----------------------------------------------------------------------------------------------------------------------8 7.1 Method--------------------------------------------------------------------------------------------------------------------------8 7.2 Correction factor K-----------------------------------------------------------------------------------------------------------8 8.

  • Page 3: Overall Check

    A. Check the overwrap first. If any damages occur, please contact ALIA Customer Service Center at once. B. Confirm whether the instrument has been damaged or its spares are lost. C. It’s recommended that you read the manual thoroughly, once you have any quires, please email or fax to ALIA technical department.

  • Page 4: Features

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 3. Features  5-digit flow rate&8-digit totalizer  Local indication without auxiliary power  4-20 mA and scale pulse output  Low pressure loss in gas and steam application  Damper for gas/steam application  Constant overall length ...

  • Page 5: Dimensions And Pressure Loss

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG Dimensions and Pressure Loss m3 Hr AVF250 m3 Hr m3 Hr AVF250 Water AVF250 1000Kg/m3 eg.C 3 5Kg /cm2 Wa te r 00Kg/m3 35 Deg 3 5 Kg /cm2 Wat er 1000 Kg/ m3 35 Deg. 3 5Kg /cm2 170 5mm...

  • Page 6: Installation

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 6. Installation 6.1 Scheme AVF250 m3 Hr AVF250 → m3 Hr AVF250 6 .0 m3 Hr AV F2 50 m3 Hr AVF250 Water 1000Kg 35Deg . 3 5Kg /cm2 → AVF250...

  • Page 7: Straight Pipe Requirement

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 6.2 Straight Pipe Requirement Proper place is vital to flowmeter installation; otherwise flowmeter’s accuracy will be influenced or even get damaged. m3 Hr AVF250 m3 Hr Wat er 10 00 Kg/m 3 35 De g. 3 5Kg /c m2 AVF250 Water...

  • Page 8: Size Calculation

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 7. Size Calculation 7.1 Method 1) Qs=K×Q Among: Qs-flow rate of calibrated medium (water or air) under standard condition (20 C，1atm) Q-flow rate of user’s medium K-correction factor 2) Based on the Qs, check flow table (page 2 in datasheet) to choose float and measuring tube’s size. The flow data in table are both under standard condition of air or water.
  • Page 9 AVF250 Operation Manual OP250.1.1.7Z.R8ENG For steam medium: If AVF250 is to measure saturated steam, formula will be: 29 56 ρ Among: Qs: water’s flow rate ρ: steam’s density under operation condition (kg/m3) M: steam’s flow rate (kg/h) Choose flowmeter from Qs (water’s flow rate) after calculating as formula above. This formula is derived by taking float’s density as 7900kg/m3.

  • Page 10: Installation Considerations And Maintenance

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 8. Installation Considerations and Maintenance (1) Before installation, please sweep the process pipe first so as to avoid any magnetic particles remained inside pipe as it will influence flowmeter’s performance or cause damage to flowmeter due to adhesion onto flowmeter. If it’s unavoidable, please install filter before flowmeter’s inlet.

  • Page 11: Wiring Diagram

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 9. Wiring Diagram This flowmeter adopts 4-20mA output signal of 2-wire to other external equipment of device with power supply 12~36 VDC. The maximum load resistance to output circuit is 600Ω (including resistance of cable). Generally, it’s recommended to use PVC shielded cable that resists 600V. If the environment is easily to be interfered by noises of equipments, please use 2-core shielding cable (RWP2×0.5mm) with one of its terminals connecting to grounding screw of flowmeter’s housing and another to the ground.

  • Page 12: Pulse Connection

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 9.3 Pulse Connection 24VDC 5Kohm Flow meter terminal 9.4 Alarm 72 71 12 11 72 71 12 11 200.00 000000.00 C O M Pin 11,12 : Power Supply:18~32VDC Pin 31,32, : H Alarm Output Pin 34,35, : L Alarm Output Pin 71,72 :4-20mA Output C O M 4-20mA...

  • Page 13: Local Indicator_ Reed Switch Alarm

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 9.5 Local Indicator_ Reed Switch Alarm Pin 31,32,33 :H Alarm Pin 34,35,36 : L Alarm C OM Rating:1A@30VDC C OM 9.6 RS485 Modbus Protocol 5251 711211 Power Supply 18-32VDC 4-20mA Output 200.00 000000.00 Pin 11,12: Power supply:18~32VDC Pin 71,72: 4-20mA Output Pin 51,52: RS485（Modbus Protocol）...
  • Page 14 AVF250 Operation Manual OP250.1.1.7Z.R8ENG Modbus table AVF250 Modbus Table Content Data Type Address Length Read Flow Rate float Ox03E8 Ox0002 Totalizer float Ox03EA Ox0002 Current float Ox03EE Ox0002 Percentage float Ox03F1 Ox0002 Velocity float Ox03F3 Ox0002 0:L/h 1:m3/h 2:Nm3/h 3:NL/h 4:kg/h 5:t/h 6:L/min 7:m3/min 0x03EC Unit of flow rate...

  • Page 15: Keypad

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 10. Keypad Key Name Button Basic Function Setting Function Enter parameter setting Save data Data setting interface Increase number & Save data Indicate data setting interface Digit shift & Decimal point shift Display Interface 10.1 TOTRL 000.00 000.00 000.00...

  • Page 16: Operational Flowchart

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 11. Operational Flowchart m3/h ∑ 02000 02008 3018 5018 SET T CUT OFF ZERO ADCAL DAMP BAUD SPAN SU-H AD 00 SET TOT SH-d FILTER AD 10 ADCAL CLR TOT SU-L Density DAO 4 AD 20 SL-d Density DAF 20...

  • Page 17: Operation And Settings

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 12. Operation and Settings 12.1 General Settings 4-20mA output can only be set by keys. m3/h ∑ 2000 Input Password LOCK Press to change value and press to next setting. Password: 2000 SET TOT Preset Totalizer Preset totalizer as required.
  • Page 18 AVF250 Operation Manual OP250.1.1.7Z.R8ENG 00000 The Corresponding Value of 4mA Output PRO-LO Press to change value. This value corresponds to 4mA output. Press to next setting. 01.500 The Corresponding Value of 20mA Output PRO-HI Press to change value. This value corresponds to 20mA output. Press to next setting.
  • Page 19 AVF250 Operation Manual OP250.1.1.7Z.R8ENG Alarm Low Limit Setting SU - L Press to set lower limit value (range: 0%~110%), and then press to next setting. When setting value is 0, the low limit terminal is the pulse output terminal. Hysteresis Value of Alarm Low Limit Press to change hysteresis value of alarm low limit (setting range: 0%~30%), and then press SL –...

  • Page 20: Calibration Parameter Setting

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 12.2 Calibration Parameter Setting m3/h ∑ 2008 Input Password LOCK Press to change value and press to next setting. Password: 2008. 00000 Zero Point Adjustment ZERO Default value is 0. It’s used to calibrate lower range value. Please do not modify randomly. Press to change value and press to next setting.
  • Page 21 AVF250 Operation Manual OP250.1.1.7Z.R8ENG 22733 50% Flowrate Calibration (Please do NOT adjust this parameter randomly) Adjust pointer to the location of 50%, wait until value is stable and then press to next parameter. Press to next parameter directly. Press to switch point. 25176 60% Flowrate Calibration (Please do NOT adjust this parameter randomly) Adjust pointer to the location of 60%, wait until value is stable and then press...

  • Page 22: Other Parameter Settings

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 12.3 Other Parameter Settings m3/h ∑ 3018 Input Password LOCK Press to change value and press to next setting. Password: 3018 Low Flow Cutoff (Setting range: 0 –30) Press to change value and press to next setting. 8 mean 8%.

  • Page 23: Communication Address And Size Setting

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 12.4 Communication Address and Size Setting m3/h ∑ 5018 Input Password LOCK Press to change value and press to next setting. Password: 5018 Device Address Press to change value. HART address(00~15), Modbus address(1~99) And press to next setting. 09600 Baud Rate Press...

  • Page 24: Troubleshooting

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG 13. Troubleshooting 1. Shake (1) Slight shake: it’s usually caused by medium fluctuation. By adding a buffer device or extending straight pipe will solve this problem. (2) Medium shake: it’s usually caused by medium flowing state. For gas, it’s caused by unstable operating pressure. By using a voltage-stabilizing/fluid-stabilizing device or increasing damping will solve this problem.
  • Page 25 AVF250 Operation Manual OP250.1.1.7Z.R8ENG 9. Wrong totalizer pulse output (1)Check whether the alarm of totalizer pulse output is correct. (2)Check whether the external power is between 5 and 24VDC and connect 1-5K resistance in series. (3) Circuit board is malfunctioned. It needs to be replaced.

  • Page 26: Appendix Density Of Common Gas And Liquid

    AVF250 Operation Manual OP250.1.1.7Z.R8ENG Appendix Density of Common Gas and Liquid Pressure: 0.1013Mpa Temperature: 20℃ Unit: kg/m3 Density of Common Gas Name Density Name Density Name Density Name Density 1.2041 Propane 1.8332 Benzene 3.2476 Fluorine 1.5798 Nitrogen 1.1646 n-Butane 2.4163 Carbon monoxide 1.1650 Chlorine...

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