Honeywell 705 Operating Instructions Manual
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Honeywell 705 Operating Instructions Manual

Honeywell 705 Operating Instructions Manual

Co sensor and transmitter for electrochemical cells
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Operating Instructions
Sieger Type 705
CO Sensor and Transmitter for Electrochemical Cells
UL Certified 00705A1731
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Summary of Contents for Honeywell 705

  • Page 1 Operating Instructions Sieger Type 705 CO Sensor and Transmitter for Electrochemical Cells UL Certified 00705A1731...

  • Page 2: Man0364.P65 Issue 03, Mar

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 HELPING TO MAKE A SAFER WORLD Ensure that you read and understand these Operating Instructions BEFORE installing or operating any part of the equipment. Please pay particular attention to the Safety Warnings.

  • Page 3: 00705M5003

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 HELPING TO MAKE A SAFER WORLD IMPORTANT NOTICES Zellweger Analytics Ltd can take no responsibility for installation and/or use of its equipment if this is not done in accordance with the appropriate issue and/or amendment of the manual.

  • Page 4: Table Of Contents

    Weather Protection Housing Sample Flow Housing MAINTENANCE General Cleaning CALIBRATION General Cross Interference From Other Gases Sensor Life Calibration Procedure GASSING THE SENSOR Equipment Required Calibration Gassing Procedure REPLACEMENT PARTS Terminal Housings Maintenance Spares TYPE 705 SENSOR ALTERNATIVE SYSTEMS SPECIFICATION...
  • Page 5 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003...

  • Page 6: Introduction

    00705M5003 1. INTRODUCTION 1.1 GENERAL The Type 705 Carbon Monoxide Sensor is a toxic gas detector certified for installation in a hazardous area. This version uses an Electrochemical (ECC) Sensor, in conjunction with an electronic circuit to form a three wire 4 - 20mA transmitter.

  • Page 7: Accessories

    Mounting Thread Accessory Thread Sintered Disc Hydrophobic Barrier (fit white side out) Filter Housing Figure 1 Type 705 Sensor and Filter Housing 1.3 ACCESSORIES 1.3.1 General The following accessories are available for use with the sensors: Collecting Cone (Figure 2).
  • Page 8 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 1. INTRODUCTION A nozzle on the cone permits gassing of the sensor with the cone in position. The test gas is applied either direct to the nozzle or via a permanently connected pipeline when the sensor is fitted in an inaccessible location.
  • Page 9 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 1. INTRODUCTION 50.8mm Dia 51.0mm 25.5mm Figure 3 Weather Protection Housing 1.3.4 Sample Flow Housing A Sample Flow Housing provides a means to sample gas from a closed system, via two pipelines. The flow housing is...
  • Page 10 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 1. INTRODUCTION 1.3.5 Gassing Point Assembly This assembly can be fixed at a convenient position and permanently connected by suitable tubing to an inaccessible sensor, thus simplifying the application of a test gas when checking the sensor calibration.

  • Page 11: Installation

    Replacement of components by other than Zellweger Analytics Limited authorised engineers will invalidate the instrument warranty and certification. The Type 705 Sensor must never be used in conditions when the flameproof integrity of the sensor and associated terminal housing is impaired.

  • Page 12: Cable Connections

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 2. INSTALLATION Cable Entry Conduit Cable Entry Conduit Killark Box with Adalet X1HFC3L 705 Sensor Terminal Housing Figure 6 Terminal Housings 2.4 CABLE CONNECTIONS The sensor is connected by three wires to the terminals on the pcb.

  • Page 13: Fitting Sensors

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 2. INSTALLATION Connection Terminals Span Offset Zero Circuit Board Assembly Showing RFI Shield Plate Adjustment Controls Figure 7 Connections 2.5 FITTING SENSORS WARNINGS Before installing sensors, isolate the power supply by disconnecting or removing the associated control module from the installation.
  • Page 14 Refer to Section 8 for alternative systems to which the sensor can be connected. When replacing a sensor refer to CAUTION 1 in Section 4 Maintenance Section. To fit the 705 Sensor, proceed as follows: Remove the protection disc and fit the accessories as required. (Refer to Section 3).

  • Page 15: Fitting Accessories

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 3. FITTING ACCESSORIES 3.1 COLLECTING CONE (00780-A-0032) To fit the Collecting Cone Assembly to a sensor, proceed as follows: Remove the Filter Housing and gasket from the sensor. Fit the Hydrophobic Barrier, ensuring that the white surface faces away from the sinter.
  • Page 16 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 3. FITTING ACCESSORIES Fit the Hydrophobic Barrier, ensuring that the white surface faces away from the sinter. Screw the Sample Flow Housing on to the sensor and tighten with a 40mm A/F spanner.

  • Page 17: Maintenance

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 4. MAINTENANCE 4.1 GENERAL Maintenance consists of cleaning the sensor and accessories, replacing the gasket and Hydrophobic Barrier and gassing the sensor when testing the system. CAUTIONS The ECC cell contains a small quantity of acid. When...

  • Page 18: Calibration

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 5. CALIBRATION 5.1 GENERAL When testing and calibrating a gas detection system, the sensors must be gassed in accordance with the practice recommended for the particular installation. The sensor should be calibrated with carbon monoxide using the procedures detailed in Section 6.

  • Page 19: Calibration Procedure

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 5. CALIBRATION 5.4 CALIBRATION PROCEDURE Notes: 1. Ensure that the sensor is not pressurised during calibration by blockage of the exhaust (outlet of the Flow Housing). 2. This procedure will produce an upscale output signal which may activate alarms if fitted.

  • Page 20: Gassing The Sensor

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 6. GASSING THE SENSOR 6.1 EQUIPMENT REQUIRED To test and calibrate the gas detection system the following items are required: A suitable Calibration Gas Test Kit and a bottle of the appropriate test gas.

  • Page 21: Replacement Parts

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 7. REPLACEMENT PARTS Note: When ordering replacements, always quote the complete part number. Where a part number is not listed or known, state type, material, cable entry size and other relevant details.

  • Page 22: Type 705 Sensor Alternative Systems

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 8. TYPE 705 SENSOR ALTERNATIVE SYSTEMS TOXIC SYSTEMS Safe Area Hazardous Area ASSEMBLY:-00705-A-1761 CONTROL SYSTEM TRANSMITTER CO SENSOR 5700 00705-A-1760 00705-A-1731 CONTROL CARDS 05700-A-0401 05700-A-0409 05700-A-3000 INTERFACE CARDS 05700-A-0950 05700-A-0951 05700-A-0952...
  • Page 23 LINE RESISTANCE/LOAD RESISTANCE Line Resistance and Load Resistance Total The graph shows the maximum resistance allowed (cable + load) between the power supply and the 705 Sensor for various values of supply voltage. Note: For supply voltages above 24V a minimum total...

  • Page 24: Specification

    MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 9. SPECIFICATION OPERATING RANGE 0 to 500ppm CO, Overrange 0 to 1000. ANALOGUE OUTPUT 4 - 20mA two wire. The ‘sensing resistor’ can be either connected between the fuse supply and...
  • Page 25 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 9. SPECIFICATION Storage (recommended): -0º to +20ºC. For prolonged storage it is recommended that the sensor is stored in a sealed container. HUMIDITY RANGE Range 0 to 90% RH non-condensing. Prolonged operation below 20% RH can reduce operating life of the cell.
  • Page 26 MAN0364.P65 Issue 03, Mar 01 705 Sensor CO 00705M5003 9. SPECIFICATION WEATHER PROTECTION HOUSING Dimensions: 76.5mm x 50.8mm dia. Weight: 52.4g. SAMPLE FLOW HOUSING Dimensions: 61mm x 45mm x 31mm. Weight: 110g TERMINALS Screw clamped. Accepting cable up to 2.5mm².
  • Page 27 Thank you for reading this data sheet. Please contact us for a quotation: Head Office (UK) Switzerland Office P.O. Box 2124 Zugerstrasse 46 Chelmsford 6314 Unterägeri Essex CM1 3UP England Switzerland Tel: +44 (0)1245 600 560 Tel: +41 41 541 5877 Fax: +44 (0)1245 600 030 Fax: +41 41 541 5878 Email:...

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