ABB 8235 Chloride Instruction Manual
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ABB 8235 Chloride Instruction Manual

ABB 8235 Chloride Instruction Manual

Ion-selective electrode monitor
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Ion-Selective
Electrode Monitor
Instruction Manual
Model 8235 Chloride
Range: 2 to 5000 mg l
–1

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Summary of Contents for ABB 8235 Chloride

  • Page 1 Ion-Selective Instruction Manual Electrode Monitor Model 8235 Chloride –1 Range: 2 to 5000 mg l...
  • Page 2 St Neots, U.K. – Cert. No. Q5907 environmental applications. Stonehouse, U.K. – Cert. No. FM 21106 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 Section Page Section Page INTRODUCTION ............2 CALIBRATION ............28 Description ............2 Calibration Sequence ........28 Training .............. 2 MAINTENANCE ............29 Location and Function of Chemical Solutions .......... 29 Main Components ..........2 8.1.1 Reagent Solution ........ 29 INSTALLATION ............

  • Page 4: Introduction

    1 INTRODUCTION 1.1 Description The 8235 chloride monitor has a liquid handling section in the The Model 8235 Chloride Monitor is a microprocessor based lower half of a moulded plastic enclosure, and the electronics analyser using a chloride ion-selective electrode in conjunction section in the upper portion.

  • Page 5: Installation

    2 INSTALLATION 2.1 Accessories 2.4 Sampling Requirement 1 x reagent bottle 4 x calibration bottles In addition to being as close as possible to the monitor, the 1 x chloride electrode 1 x spares kit sampling point must provide a thoroughly mixed representative 1 x silver/silver chloride reference electrode sample.

  • Page 6: External Electrical Connections

    …2 INSTALLATION 2.6 External Electrical Connections – Fig. 2.3 The connections are as follows: a) Mains input 115 V (110 to 120 V) or 230 V (220 to 240 V). The Warning. mains voltage is selected by means of the voltage selector – •...

  • Page 7: Relay Contact Protection And Interference Suppression

    2 INSTALLATION… 2.7 Relay Contact Protection and Interference as shown in Fig. 2.5A. If the instrument malfunctions the value of Suppression – Fig. 2.5 the RC network is too low for suppression and an alternative If the relays are used to switch loads on or off the relay contacts value must be used.

  • Page 8: Setting Up

    3 SETTING UP …2 INSTALLATION Note. Before proceeding any further, ensure that all switches are set to OFF on the right hand side of the electronics unit – see Fig. 2.3. a) Ensure that all external electrical and plumbing connections have been made correctly.

  • Page 9: Liquid Handling Section

    4 LIQUID HANDLING SECTION 4.1 Principle of Operation The monitor uses an ABB Chloride Ion-selective Electrode in conjunction with a silver/silver chloride reference electrode. The sensing tip of the chloride electrode is a chloridised silver billet. The electrode is connected to the main electronic unit via a screened cable.

  • Page 10: Electronics Section

    5 ELECTRONICS SECTION …4 LIQUID HANDLING SECTION 5.1 Electronic Layout – Fig. 5.1 'Out of Sample' condition. This switch is used by the monitor to initiate the 'Out of Sample' alarm. The electronic section comprises two separate sections: b) From the bottom of the constant head unit the sample is •...

  • Page 11: Front Panel Controls

    5 ELECTRONICS SECTION 5.4 Front Panel Controls – Fig. 5.2 The programme controls comprise eight tactile membrane 20-character Alarm and Status 5-digit Display switches. These switches are situated behind a hinged door Dot-Matrix Display L.E.D.s (Concentration) below the display, access is via a screwdriver-operated catch. In normal operation the switches are used to view the measured ion concentration value, initiate a manual calibration, or to activate the 'alarm hold' facility.

  • Page 12: Programming

    6 PROGRAMMING...

  • Page 13: Normal Operation

    6 PROGRAMMING… 6.1 Normal Operation 6.2 Programming Pages In normal operation (Operating Page 1) the lower, dot matrix, Operation of the switch enables a series of 'programming' display gives indication of the units of measurement, millivolt pages to be displayed. Unauthorised entries to this page are value, sensor slope and time.

  • Page 14: Operating

    …6 PROGRAMMING 6.2.1 Operating Page 1 The values displayed in Operating Page 1 are for viewing only and cannot be altered in this page. Chloride <Unit> Measurement Units The measurement units are displayed: Chloride mg l –1 Mode Advance to next parameter. •...

  • Page 15: Operating

    6 PROGRAMMING… 6.2.2 Operating Page 2 To gain access to the Calibration Page (Operating Page 2), operate the switch. Enable Automatic Calibrations Enable Auto Cals Yes Select 'Yes' to enable or 'No' to disable the automatic calibrations. Store. Enter Advance to next parameter. Page header.

  • Page 16: Security Code Page

    …6 PROGRAMMING …6.2.2 Operating Page 2 Continued from previous page. Calibrating Std 2 Calibrating Standard 2 The upper display shows the chloride concentration value based on the previous good calibration figures. The lower display remains until a stable output is obtained from the electrodes.

  • Page 17: Set Up Input Page

    6 PROGRAMMING… 6.2.4 Set Up Input Page Page header. SET UP INPUT Advance to next parameter. Control Temperature °C Control Temp – – – • Set the required block control temperature within the range 5 to 45°C in 0.1°C increments. Store.

  • Page 18: Current Output Page

    …6 PROGRAMMING 6.2.5 Current Output Page The current output is assigned to the chloride concentration but is only operative if the relevant output modules are fitted – see Fig. 2.4. CURRENT OUTPUT Page header. Advance to next parameter. Output 1 Calibration Hold OP1 Cal Hold Current Output 1 can be held during calibration, if required.
  • Page 19 6 PROGRAMMING… …6.2.5 Current Output Page Continued from previous page. Output 2 Calibration Hold OP2 Cal Hold Current Output 2 can be held during calibration, if required. Select 'YES' or 'NO'. Store. Enter Advance to next parameter. Output 2 Law OP2 Law Current Output 2 can be either logarithmic or linear.
  • Page 20 …6 PROGRAMMING …6.2.5 Current Output Page Continued from previous page. Test Output Zeros Test Current Output Zeros The instrument automatically transmits a current output zero test signal on both outputs. Example – For a 4 to 20 mA current output range, 4 mA is transmitted. Advance to next parameter.

  • Page 21: Set Up Alarms Page

    6 PROGRAMMING… 6.2.6 Set Up Alarms Page Alarm l.e.d. indication and relay output can be assigned either to the chloride concentration or switched off. SET UP ALARMS Page header. Advance to next parameter. A1 Enabled Alarm A1 Enable Select 'YES' to enable or 'NO' to disable. Enter Store.
  • Page 22 …6 PROGRAMMING …6.2.6 Set Up Alarms Page Continued from previous page. – – – – A1 Setpoint • A1 Setpoint Set the required setpoint value. Enter Store. Advance to next parameter. A2 Enabled A2 Enabled Repeat the programming procedures as for Alarm Relay 1. A2 Setpoint –...

  • Page 23: Set Up Clock Page

    6 PROGRAMMING… 6.2.7 Set Up Clock Page Page header. SET UP CLOCK Advance to next parameter. Set Up Real Time Clock Set Clock? Select 'Yes' to set up the clock, otherwise select 'No'. Advance to next parameter. – – Set Year Set Year Set the appropriate year.
  • Page 24 …6 PROGRAMMING …6.2.7 Set Up Clock Page Continued from previous page. – – Set Minutes Set Minutes Set the appropriate minutes. Enter Store. Advance to next parameter. Set Seconds – – Set Seconds Set the appropriate seconds. Enter Store. Advance to next parameter. Flashing Cal Date Calibration Date (day of the month)

  • Page 25: Calibration User Code Page

    6 PROGRAMMING… …6.2.7 Set Up Clock Page Continued from previous page. Flashing Cal Time Calibration Time (hour – 24 hour clock) Set the hour of the day when the first automatic calibration is to be carried out. Enter Store and advance to next parameter. Flashing Cal Time Calibration Time (minutes)

  • Page 26: Set Up Temperature Control Page

    …6 PROGRAMMING 6.2.9 Set Up Temperature Control Page Note. All parameters within this page are factory preset and MUST NOT be altered. SET UP TEMP. CONTROL Page header. Advance to next parameter. Cycle Time Cycle Time The cycle time is adjustable between 5 and 60 seconds in 1 second increments. Advance to next parameter.

  • Page 27: Electrical Calibration Page

    6 PROGRAMMING… 6.2.11 Electrical Calibration Page CALIBRATION Page header. Advance to next parameter. mV Zero Millivolt Input Zero – – – – Set the millivolt source to –400 mV. Set the display to '–400' mV. Store. New value is accepted only when input is stable. Enter Advance to next parameter.
  • Page 28 …6 PROGRAMMING …6.2.11 Electrical Calibration Page Continued from previous page. Adjust Output 1 Zero Adjust Current Output 1 Zero The monitor transmits a zero signal, e.g. for a 4 to 20 mA output range, 4 mA is transmitted. Set the milliammeter reading to the current output 1 zero level, i.e. 0 mA (zero-based ranges) or 4 mA (4 to 20 mA range).
  • Page 29 6 PROGRAMMING …6.2.11 Electrical Calibration Page Continued from previous page. 10 m Cal Time 1 Calibration Time 1 The displayed value is preset at the factory and must not be altered. See Table 7.1. Advance to next parameter. 10 m Cal Time 2 Calibration Time 2 The displayed value is preset at the factory and must not be altered.

  • Page 30: Calibration

    7 CALIBRATION 7.1 Calibration Sequence sequentially to shut off the sample and admit standard solutions of known concentration, one low and one high (STD1 and STD2), Calibration of the monitor is carried out by replacing the sample solution sequentially with two standard solutions of known to the sample path.

  • Page 31: Maintenance

    8 MAINTENANCE 8.1 Chemical Solutions 8.1.3 Standard Solutions The reagent and standard solutions described below are required Two standard solutions of known chloride concentration to maintain the monitor in operation. Where possible, they should appropriate to the measuring range are required to calibrate the be freshly made and stored in plastic (for example, polythene) monitor.

  • Page 32: Twelve Monthly

    …8 MAINTENANCE 8.2.5 Fitting the Electrodes e) Discard old reagent and standard solutions. Clean containers thoroughly before refilling with fresh solutions – see Section The chloride electrode is supplied with a protective end cap to 8.1. prevent the tip from being scratched or chipped. To prepare for use, remove the end cap and carefully rinse the tip in distilled ✶...

  • Page 33: Peristaltic Pump

    8 MAINTENANCE… 8.2.6 Peristaltic Pump – Fig. 8.1 It is recommended that the pump tubing and pump capstans, supplied in the Consumable Spares Kit, are replaced after one year of operation. Carry out the following procedure 1 to 8: Remove the pump platen by turning the catch mechanism to the vertical position and pulling the catch forward.

  • Page 34: Shutdown Procedure

    …8 MAINTENANCE 8.3 Shutdown Procedure 8.4 Unscheduled Servicing The monitor indicates abnormal operation by means of signals on 8.3.1 Short Term the 20 character dot matrix display and the l.e.ds. The indications The monitor can be left with the power switched off for up to 24 are listed in Table 8.1.

  • Page 35: Monitor Diagnostic Information

    8 MAINTENANCE… 8.4.2 Monitor Diagnostic Information g) See Malfunction of the Electrode Section 8.4.3. Out of Service Alarm This alarm relay output is a normally energised relay which de- h) Check operation of the Microprocessor Unit by following the energises in the following circumstances: procedure in Section 6.2.10, Electrical Calibration.

  • Page 36: Microprocessor Unit Error Messages

    …8 MAINTENANCE 8.6 Microprocessor Unit Error Messages To prepare, dilute 125 ml A.R. concentrated ammonia solution s.g. 0.88, with 125 ml distilled water and stir. The instrument incorporates an automatic self-diagnostic checking facility for detection of input and output errors. If such a Nitric acid, 50% (250ml) fault occurs, one of the error messages detailed below is shown...

  • Page 37: Specification

    9 SPECIFICATION Range: ....... 2 to 5000 mg l –1 chloride Concentration Alarm Delay: ......... 0 to 60 minutes Repeatability: ....±2% of reading Programmable Data Reproducibility: ....±3% of reading Retention: ......3 years Response Time: ....Less tha 10 minutes for 90% step Calibration: ......

  • Page 38: Spares

    10 SPARES Consumable Spares t i k Refurbishment Spares – v l i v l i l i o – l l e – – – l n i – l l e r r i Strategic Spares c t i –...
  • Page 39 10 SPARES , t i c t i – s i l...

  • Page 40: Appendix A - Replacing Software Eprom

    APPENDIX A – REPLACING SOFTWARE EPROM A.2 Access the PCB – Fig. A.2 Warning. Switch off the monitor and electrically isolate it before carrying out the following steps. Unlock and open cover plate and hinge out to expose captive screws. A.1 Access the Transmitter Unit –...

  • Page 41: Removing The Pcb

    APPENDIX A A.3 Removing the PCB – Fig. A.3 Remove the four screws attaching the PCB to the assembly. Note that there are washers between the PCB cover and the PCB. Withdraw the PCB and turn it over to reveal the component side. Locate and change the EPROM IC1 –...
  • Page 42 NOTES...
  • Page 43 PRODUCTS & CUSTOMER SUPPORT Products Customer Support Automation Systems ABB Automation provides a comprehensive after sales service • for the following industries: via a Worldwide Service Organization. Contact one of the – Chemical & Pharmaceutical following offices for details on your nearest Service and Repair –...
  • Page 44 ABB Automation Inc. Oldends Lane, Stonehouse 125 E. County Line Road Gloucestershire, GL10 3TA Warminster, PA 18974 ABB has Sales & Customer Support expertise in over 100 countries worldwide Tel: +44 (0)1453-826-661 Tel: +1 215-674-6000 Fax: +44 (0)1453-827-856 Fax: +1 215-674-7183...

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