ABB 4690 Series Operating Instruction
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ABB 4690 Series Operating Instruction

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A B B M E A S U R E M E N T & A N A LY T I C S | O P E R AT I N G I N S T R U C T I O N | O I/AT S 4 1 0 - E N R E V. A
4690 Series
Turbidity sensor
Introduction
—
4690 turbidity sensor
The 4690 sensor is a rugged, reliable instrument
designed to measure the turbidity content of water.
The sensor also has additional features including
dry standard verification and automatic cleaning.
The sensor is designed for use with the ABB AWT420
dual-input transmitter.
Accurate, reliable turbidity
measurement
Measurement made easy
For more information
Publications for the associated transmitters are
available for free download from:
www.abb.com/measurement
or by scanning this code:
Data Sheet
AWT420
Universal 4-wire, dual-input transmitter
Data Sheet
4690 Series
Turbidity Sensor
Operating Instruction
AWT420
Universal 4-wire, dual-input transmitter
Search for or click on:
DS/AWT420-EN
DS/ATS410-EN
OI/AWT420-EN

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Summary of Contents for ABB 4690 Series

  • Page 1 The sensor also has additional features including www.abb.com/measurement dry standard verification and automatic cleaning. or by scanning this code: The sensor is designed for use with the ABB AWT420 dual-input transmitter. Search for or click on: Data Sheet AWT420...

  • Page 2: Table Of Contents

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Contents Health and safety Safety precautions .

  • Page 3: Health And Safety

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Health and safety Safety precautions Symbols that appear in this document are explained below:...

  • Page 4: Product Symbols

    Symbols that may appear on this product are shown below: (Europe only) Protective earth (ground) terminal. ABB is committed to ensuring that the risk of any environmental damage or pollution caused by any of Functional earth (ground) terminal. its products is minimized as far as possible. The...

  • Page 5: Turbidity Sensor Components

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Turbidity sensor components Sample outlet Wiper plug...

  • Page 6: Installation

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Installation Siting requirements Make sure that there is a clearance of 200 mm (7.9 in) all around the sensor, to let the turbidity sensor be easily removed for...

  • Page 7: Sample Flow Rate

    An optional de-bubbler (part number 7997 500) is available to eliminate gas bubbles. Refer to Install the optional de-bubbler on page 8. Figure 4 4690 Series – sample outlet connector location...

  • Page 8: Install The Optional De-Bubbler

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Install the optional de-bubbler Mounting the de-bubbler Mount the de-bubbler vertically with the flow upwards.

  • Page 9: Setup Procedure For The De-Bubbler

    Drain valve Sample in Optional Figure 6 Typical system installation for 4690 series turbidity systems NOTICE 1 To prevent degassing of the sample, which can cause very erratic readings, do not exceed this measurement. 2 This is the minimum installation distance that ensures adequate flow rate through the sensor. Increase this distance if you...

  • Page 10: Turbidity Sensor Electrical Connections

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A 4 Turbidity sensor electrical connections Blue Link...

  • Page 11: Calibration

    If the comparison with a primary standard shows that the turbidity value of the secondary standard has changed, the A key feature of the 4690 Series Turbidity system is the dry secondary standard can be assigned a new turbidity value for secondary calibration standard.

  • Page 12: Calibration Verification With A Secondary Standard

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Calibration verification with a secondary NTU value indication Zero NTU indication...

  • Page 13: Calibration With A Primary Standard

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Calibration with a primary standard NTU value indication Zero NTU indication...

  • Page 14: Maintenance

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A 6 Maintenance Fault-finding Unstable or erratic readings...

  • Page 15: Specifications

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A 8 Specifications Sensor Wetted parts –...

  • Page 16: Spares And Consumables

    4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A 9 Spares and consumables Maintenance kits Part number...
  • Page 17 4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Notes...
  • Page 18 4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Notes...
  • Page 19 4 6 9 0 S E R I E S | T U R B I D I T Y S E N S O R | O I/AT S 4 1 0 - E N R E V. A Notes...
  • Page 20 We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.

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