ABB 4670 Series User Manual
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ABB 4670 Series User Manual

ABB 4670 Series User Manual

Turbidity systems
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Turbidity Systems
User Guide
IM/4670_13
4670 Series

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Summary of Contents for ABB 4670 Series

  • Page 1 Turbidity Systems User Guide IM/4670_13 4670 Series...
  • Page 2 We are an established world force in the design and manufacture of instrumentation for industrial process control, flow measurement, gas and liquid analysis and environmental applications. Cert. No. Q05907 As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and support worldwide. EN 29001 (ISO 9001) We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support.

  • Page 3: Table Of Contents

    CONTENTS TURBIDITY MEASUREMENT SYSTEMS ....2 MAINTENANCE ............29 Introduction ............2 Scheduled Maintenance ........29 Turbidity Measurement Systems ......3 7.1.1 Sensor Cleaning ......... 29 7.1.2 Calibration .......... 29 MECHANICAL INSTALLATION ........5 7.1.3 Using Dry Calibration Standards ..29 Siting Requirements ...........

  • Page 4: Turbidity Measurement Systems

    1.1 Introduction The analyzers can be programmed to work with any of the 7997 An ABB Turbidity System comprises a 4670 wall-mounted, or sensors, and the operating range can also be configured to 4675 panel-mounted, analyzer, together with one of five sensor meet users' requirements.

  • Page 5: Turbidity Measurement Systems

    1 MEASUREMENT SYSTEMS... 1.2 Turbidity Measurement Systems – Figs. 1.1A and 1.1B 4670 500 7997 200 & 201 7997 200 & 201 4675 500 4670 20y & 21y Systems 4675 20y & 21y Systems 4670 500 7997 202 7997 202 4675 500 4675 22y System 4670 22y System...
  • Page 6 …1 MEASUREMENT SYSTEMS ...1.2 Turbidity Measurement Systems – Figs. 1.1A and 1.1B 7997 400 7997 400 Series Series 4670 500 4675 500 4670 40y Series Systems 4675 40y Series Systems 4670 500 7997 450 7997 450 Series Series 4675 500 4670 45y Series Systems 4675 45y Series Systems Fig.

  • Page 7: Mechanical Installation

    2 MECHANICAL INSTALLATION 2.1.2 Sensor Unit – Fig. 1.1A 2.1 Siting Requirements (Models 7997 200 Series and 7997 300 only) 2.1.1 Analyzer – Fig. 2.1 For easy removal of sensor unit for maintenance if required, allow sufficient clearance of 200 mm (7.9 in.) all around – see Section 2.3.1 for overall dimensions of units.

  • Page 8: Mounting The Transmitter Unit

    …2 MECHANICAL INSTALLATION 2.2 Mounting the Transmitter Unit 2.2.1 Wall-mounted Instrument – Figs. 2.2 and 2.3 Dimensions in mm (in.) 68 (2.68) 160 (6.3) (1.65) (8.43) (9.13) (9.84) Allowance for 69 (2.72) 200 (7.9) Cable Bends Fixing Centres 61 (2 ) O.D.

  • Page 9: Panel-Mounted Instrument

    2 MECHANICAL INSTALLATION… 2.2.2 Panel-mounted Instrument – Figs. 2.4 and 2.5 Dimensions in mm (in.) +0.8 +0.03 (3.62 12 (0.47) –0 –0 96 (3.78) 191 (7.52) +0.8 –0 Panel Cut-out (3.78) +0.03 (3.62 –0 Fig. 2.4 Overall Dimensions Cut a hole in the panel (see Fig. 2.4 for dimensions). Instruments may be close stacked to DIN 43835.

  • Page 10: Installing The Turbidity Sensor Unit

    …2 MECHANICAL INSTALLATION 2.3 Installing the Turbidity Sensor Unit – Table 1.1 and Fig. 2.6 Systems and sensors are shown in Table 1.1. The main components of each unit are identified in Fig. 2.7. Blanking Plug Optical Wiper Optical Emitter Unit Emitter Flow-chamber...

  • Page 11: 7997 201 And 7997 202

    2 MECHANICAL INSTALLATION… 2.3.6 Mounting the Sensor – Figs. 2.7 (7997 200 2.3.1 7997 201 and 7997 202 and 300 Series), 2.8 (7997 200 Series), 2.9 (7997 These sensors are designed to operate at very low turbidity 300), 2.10 (7997 400 Series) and 2.11 (7997 450) values of less than 0.1 NTU.
  • Page 12 …2 MECHANICAL INSTALLATION ...2.3.6 Mounting the Sensor – Figs. 2.8 (7997 200 Series), 2.9 (7997 300), 2.10 (7997 400 Series) and 2.11 30mm 2 holes (7997 ?00) 7mm Dia. Approx. 240mm 46.5 155.5 Sample outlet, see Fig. 2.8 for location. Optical Emitter/Wiper Cable to Transmitter via Junction Box...

  • Page 13: Mounting The De-Bubbler

    2 MECHANICAL INSTALLATION 2.3.7 Mounting the De-bubbler – Fig. 2.13 2.3.8 Set Up Procedure for Optional De-bubbler – Fig. 2.14 For use with the Model 7997 201. With a system which includes a de-bubbler, set it up as follows: 1) Open the 'sample in' isolating valve (A) such that the overflow from the de-bubbler is at a minimum.

  • Page 14: Electrical Connections

    3 ELECTRICAL CONNECTIONS Warning. • Although certain instruments are fitted with internal fuse protection, a suitably rated external protection device, e.g. fuse or miniature circuit breaker (m.c.b.), must also be fitted by the installer. • Before making any connections, ensure that the power supply, any high voltage-operated control circuits and high common mode voltage are switched off.

  • Page 15: Connections, General

    3 ELECTRICAL CONNECTIONS… 3.2 Connections, General Warning. The power supply earth (ground) must be connected to ensure safety to personnel, reduction of the effects of RFI and correct operation of the power supply interference filter. Information. • Earthing (grounding) – stud terminal(s) is fitted to the transmitter case for bus-bar earth (ground) connection – see Fig. 3.1 or 3.5.

  • Page 16: Wall-Mounted Instrument Connections

    …3 ELECTRICAL CONNECTIONS 3.3 Wall-mounted Instrument Connections – Fig. 3.4 and Table 3.1 Note. Refer to Fig. 3.1 for Access to Terminals. Caution. Slacken terminal screws fully before making connections. 5 6 7 – Retrans. Relay 1 Power Relay 2 Supply Serial Retransmission...

  • Page 17: Panel-Mounted Instrument Connections

    3 ELECTRICAL CONNECTIONS… 3.4 Panel-Mounted Instrument Connections – Fig. 3.5 and Table 3.1 Note. Refer to Fig. 3.2 for Access to Terminals. Important Note. To locate wires in the terminal blocks, slacken the terminal screws until full clearance is achieved. Earth Stud Retransmission Output –...

  • Page 18: Selecting The Mains Voltage

    …3 ELECTRICAL CONNECTIONS 3.5 Selecting the Mains Voltage 3.5.1 Wall-mounted Instrument 3.5.2 Panel-mounted Instrument Remove Cap Remove front and Screw panel Slide instrument out of case 230 V AC 110 V AC Slacken captive screws and Undo captive remove screw protection cover Remove front...

  • Page 19: Turbidity Unit Connection Box

    3 ELECTRICAL CONNECTIONS 3.6 Turbidity Unit Connection Box – Fig. 3.8 To Turbidity Unit Optical Receiver Optical Wiper Emitter Unit Model 7997 400 Series Note. On 7997 400 Series Models only, the sensor is wired directly into the Screen Braid transmitter.

  • Page 20: Controls And Displays

    4 CONTROLS AND DISPLAYS 4.1 Displays – Fig. 4.1 Advance to The display comprises a 5-digit, 7-segment digital upper display next page line and a 16-character dot-matrix lower display line. The upper Page 1 Page 2 display line shows actual values of turbidity, temperature, alarm Parameter 1 Parameter 1 set points or programmable parameters.

  • Page 21: Start Up And Operation

    5 START UP AND OPERATION 5.1 Instrument Start-up Ensure all electrical connections have been made and switch on the power supply. If the instrument is being commissioned for the first time, calibration (Section 7.4) and programming of parameters (Section 6) is required. 5.2 Operation –...

  • Page 22: Calibration Page

    …5 START UP AND OPERATION 5.2.2 Calibration Page Calibration involves standardizing the instrument using either a Dry Calibration Standard of a known turbidity value or by using a formazine standard solution, details of which are given in Section 7. Example calibration sequences using the Dry Standard and a Formazine Standard, follow. Specific details of calibration procedures for all models are also given in Section 7.
  • Page 23 5 START UP AND OPERATION …5.2.2 Calibration Page Formazine Standard (wet) Calibration – see also Section 7.3.1. Model 7997 200 Series Model 7997 300 Model 7997 400 Series – – – – – SENSOR CAL. –––––– Advance to next parameter. –––––– Calibration Access 0 0 0 0 0 Enter the required calibration code number, between 00000 and 19999.

  • Page 24: Programming & Electrical Calibration

    6 PROGRAMMING & ELECTRICAL CALIBRATION Access to Secure Parameters Operating Page Calibration Page 0 0 0 0 0 Start 2 0 0 — — — — — SECURITY CODE (NTU) SENSOR CAL. Turbidity 0 2 0 0 0 0 0 0 User Code Sensor Voltage 2 0 0...

  • Page 25: Access To Secure Parameters

    6 PROGRAMMING & ELECTRICAL CALIBRATION… 6.1 Access to Secure Parameters A 5-digit security code is used to prevent unauthorized access to the secure parameters. Security Code 0 0 0 0 0 Enter the required code number, between 00000 and 19999, to gain access to the secure parameters.
  • Page 26 …6 PROGRAMMING & ELECTRICAL CALIBRATION ...6.3 Set Up Parameter Page continued from previous page Test Cleaner Diagnostics (7997 200 and 300 Series only) — — — — — Used to switch the cleaning diagnostics on or off. Gives user the option of selecting indication of the wiper function. Test Cleaner NO Bubble Rejection Mode —...

  • Page 27: Set Up Outputs Page

    6 PROGRAMMING & ELECTRICAL CALIBRATION… 6.4 Set Up Outputs Page — — — — — SET UP OUTPUTS Alarm 1 Action — — — — — For 'Fail-safe' alarm operation the relay's alarm state must be the same as the power-down state, i.e.
  • Page 28 …6 PROGRAMMING & ELECTRICAL CALIBRATION …6.4 Set Up Outputs Page Test Retransmission Output 1 0 0 0 The instrument automatically transmits a test signal of 0, 25, 50, 75 or 100% of the retransmission range selected above. The % test signal selected is shown on the upper Test Retrans (%) display.

  • Page 29: Electrical Calibration

    6 PROGRAMMING & ELECTRICAL CALIBRATION 6.5 Electrical Calibration Caution. The instrument is calibrated by the company prior to despatch and an electrical calibration should not be necessary. If an electrical calibration is carried out, suitably calibrated and verifiable test equipment must be used. 6.5.1 Equipment Required a) Millivolt source 0 to +4000 mV.

  • Page 30: Electrical Calibration Page

    …6 PROGRAMMING & ELECTRICAL CALIBRATION 6.7 Electrical Calibration Page In this section the actual values denoted by 'xxxxx' are unimportant and are used to determine display reading stability when carrying out the electrical calibration procedure. — — — — — ELECTRICAL CAL Electrical Calibration —...

  • Page 31: Maintenance

    7 MAINTENANCE 7.1 Scheduled Maintenance 7.1.3 Using Dry Calibration Standards The following servicing schedule has been produced as a Dry Calibration Standards are used to verify system accuracy. general guide only. Because the systems are designed for a wide They provide a means of verifying the integrity of the loop without range of applications, where the nature of the sample can vary the need for chemical standard solutions.

  • Page 32: Calibration Checks

    …7 MAINTENANCE 7.2 Calibration Checks d) Insert the Dry Calibration Standard with the zero on the label The system uses LED technology and very stable electronics facing the receiver. which avoids the risk of electronic drift. Therefore, routine calibration is normally unnecessary. However, it may be NTU value Zero NTU necessary to routinely check the system accuracy (particularly...
  • Page 33 7 MAINTENANCE… …7.2.1 Procedure Model 7997 300 d) Close the drain valve and fill the chamber with high purity water. a) Shut off sample water using the isolating valve installed Note the reading on the display. upstream of the sensing unit. If readings are out of spec.

  • Page 34: Using Formazine Standard Solution

    …7 MAINTENANCE …7.2.1 Procedure 7.3 Using Formazine Standard Solution Model 7997 400 Series 7.3.1 Preparing the Formazine Standard for Wet Calibration a) Dissolve 50.0 g of hexamethylenetetramine (C ) in high Caution. Before removing the sensor from the sample, purity water and dilute to 400 ml – Solution A. ensure the programmed cleaning interval ( Set Up greater...

  • Page 35: Unscheduled Maintenance

    7 MAINTENANCE… 7.4 Unscheduled Maintenance Cleaner Fail (7997 200 and 300 Series only) If the instrument fails to produce results as expected, the Indicates that the transmitter was unable to detect the correct following checks should be made for the messages displayed. operation of the cleaner;...

  • Page 36: Intermittent Short Term Spikes In Turbidity Readings

    …7 MAINTENANCE 7.4.3 Intermittent Short Term Spikes 7.4.5 Determination of the Dry Standard Value in Turbidity Readings for the 7997 300 and 400 Series Sensors This is usually due to bubbles going through the light path within The dry standards supplied with the 7997 300 and 7997 400 the flowcell.

  • Page 37: Specification

    8 SPECIFICATION 7997-200 Turbidity Sensor 7997-201 & 7997-202 Turbidity Sensors Range Range Programmable 0 — 25 NTU to 0 — 250 NTU and Programmable 0 — 1 NTU to 0 — 30 NTU 0 — 500mg/l (or p.p.m.) * Measurement Principle Measurement Principle 90°...
  • Page 38 …8 SPECIFICATION 7997-300 Turbidity Sensor 7997-400, 7997-401 Dip & 7997-405 Flow Turbidity Sensors Range Range Programmable 0 — 100 FTU to 0 — 500 FTU and 0 to 1000mg/l (or ppm) * Programmable 0 — 100 to 0 — 1000 FTU Measurement Principle and 0 —...
  • Page 39 8 SPECIFICATION 4670-5/500 Analyzer Models Relay Outputs and Set Points Display No. of relays Measured value 5-digit x 7-segment backlit LCD Relay contacts Single pole changeover Information Rating 250V AC 250V DC max. 16-character, single line, dot matrix, backlit LCD 3A AC 3A DC max.

  • Page 40: Spares

    9 SPARES 9.2 Model 7997 300 9.1 Model 7997 200 Series Fig. 9.2 Model 7997 300 b i l o i t Fig. 9.1 Model 7997 200 Series i l i ) y l t t i b i l o i t i l i ) y l...

  • Page 41: Model 7997 400 Series

    9 SPARES 9.3 Model 7997 400 Series 9.4 Calibration Standards i l a Notes. & • Specify length of & cable required: max. 100 m. & & Probe • good quality IP65 Table 9.4 Dry Calibration Part Numbers rated junction box to connect 9.5 De-bubbler –...

  • Page 42: Principle Of Operation

    APPENDIX A A1 Principle of Operation Detector Detector Lens Scattered Light Lens Lens Sample Cell Sample Cell A Transmitted Light Turbidimeter Lens (Absorptiometer) A simple Scattered Light Turbidimeter. Light scattered 90° to the source light is detected Fig. A1 Nephelometric Turbidity Meter Fig.

  • Page 43: Determination Of The Correction Factor

    APPENDIX B B1 Determination of the Correction Factor B1.2 Method Follow the calibration procedures detailed in Section 8, then B1.1 Definition carry out the following operations: 1) On Set Up Parameter page select mg/l. Suspended solids: The weight of solid, expressed as mg l , obtained by filtration 2) Enter a FTU to mg/l correction factor of 1.0.

  • Page 44: 7997 100 Sensors

    APPENDIX C C1 7997 100 Sensors Flow-chamber C1.1 Description This sensor no longer available;. It has been replaced by the 7997 201 and 7997 202 sensors. It is included here to provide information for Inlet/Isolating Valve Flow-chamber users of existing 7997 100 sensors. The sensor is designed to operate at very low turbidity values of less than Outlet/Isolating Valve...

  • Page 45: Wall-Mounted Instrument Connections

    APPENDIX C… C1.3 Wall-mounted Instrument Connections – Fig. C3 Note. Refer to Fig. 3.1 for Access to Terminals. Caution. Slacken terminal screws fully before making connections. 5 6 7 – Retrans. Relay 1 Power Relay 2 Supply Turbidity Sensor Serial Retransmission Relay 1 Power...

  • Page 46: Panel-Mounted Instrument Connections

    …APPENDIX C C1.4 Panel-mounted Instrument Connections – Fig. C4 Note. Refer to Fig. 3.2 for Access to Terminals. Caution. Slacken terminal screws fully before making connections. Earth Stud Retransmission Output – Rx– RS485 Serial Interface (If fitted) Normally Closed Tx– Common Relay 1 Normally Open...

  • Page 47: Turbidity Unit Connection Box

    APPENDIX C… C1.5 Turbidity Unit Connection Box To Turbidity Unit Information. If a longer cable to the 4600 Series unit is to be fitted, remove the existing cable and replace it making the appropriate Optical Optical Emitter connections shown here and in Fig. 3.4 or Receiver Screen Braid...

  • Page 48: Maintenance

    …APPENDIX C C1.6 Maintenance Sensor Cleaning The Model 7997/100 sensor unit is generally used on clean water samples and maintenance should be limited mainly to manual monthly cleaning of the flow chamber, under normal conditions. If there is a high turbidity breakthrough, clean the chamber immediately to ensure accurate readings.
  • Page 49 NOTES...
  • Page 50 …NOTES...
  • Page 51 Service and Repair Centre. – Food & Beverage – Manufacturing United Kingdom – Metals and Minerals – Oil, Gas & Petrochemical ABB Limited – Pulp and Paper Tel: +44 (0)1453 826661 Fax: +44 (0)1453 827856 Drives and Motors United States of America •...
  • Page 52 ABB has Sales & Customer Support The Company’s policy is one of continuous product improvement and the right is reserved to modify the expertise in over 100 countries worldwide information contained herein without notice. Printed in UK (08.04) www.abb.com © ABB 2004 ABB Limited ABB Inc.

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