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enraf 862 MIT Instruction Manual

Multi element interface thermo sensor converter
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Instruction manual 862 MIT
Multi element Interface
Thermo sensor converter
August 2006
Part no.: 4416.231
Rev. 2
Enraf B.V.
P.O. Box 812
2600 AV Delft
Netherlands
Tel.
: +31 15 2701 100
Fax
: +31 15 2701 111
E-mail
: info@enraf.nl
Website
: http://www.enraf.com
Instruction manual 862 MIT
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Summary of Contents for enraf 862 MIT

  • Page 1 Instruction manual 862 MIT Multi element Interface Thermo sensor converter August 2006 Part no.: 4416.231 Rev. 2 Enraf B.V. P.O. Box 812 2600 AV Delft Netherlands Tel. : +31 15 2701 100 : +31 15 2701 111 E-mail : info@enraf.nl Website : http://www.enraf.com...
  • Page 2 Copyright 2000 - 2006 Enraf B.V. All rights reserved. Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no responsibility for any errors that may appear in this manual.

  • Page 3: Preface

    873 SmartRadar or 877 FDI. For mechanical and electrical installation of the 862 MIT and the 864 MTT (Multi Thermo sensor Thermometer), refer to the installation guides of these instruments. Refer also to the list of related documents in Appendix B.

  • Page 4: Table Of Contents

    Table of contents Table of contents Preface ................3 Introduction .

  • Page 5: Introduction

    MTT with up to 16 spot temperature elements. The 862 MIT must always be used in combination with an 854 level gauge, an 873 SmartRadar or an 877 Field Display & Interface. These instruments must be equipped with an MPU, HPU or OPU option board to interface the 862 MIT.
  • Page 6 This temperature value is used as reference temperature for the thermocouples. The first time the 862 MIT is switched on (with an MTT connected) measurement cycles 7 ÷ 21 determines the wiring sequence of the thermocouple wiring.

  • Page 7: Commissioning

    For information how to program items, refer to the instruction manual of the used level gauge or to the instruction manual of the 847 Portable Enraf Terminal. For the connection of the 862 MIT to the instrument, refer to the installation guide of the 862 MIT and the installation guide of the used level gauge.

  • Page 8: Tank And Temperature Probe Data

    Commissioning 2.3 Tank and temperature probe data Figure 2.1 MTT definitions Item Name Description Protection level 2 Enter protection level 2. MR= Reference resistance Internal floating point format (default: +.00000000E+00 ). The reference resistance value must be set on: +.22200000E+03. MT= Element type Three characters (default: TPL).
  • Page 9 Give the found wiring sequence from item RW into item MW. Note 1: When entering item MW with the Portable Enraf Terminal, the display will be cleared after entering the 15 character. Continue with entering the last character and press return. All 16 entered characters will be repeated at the top line of the PET.

  • Page 10: Additional Settings For An 877 Fdi

    One character; either “I” or “E”. This item selects if there is a selection temperature measurement inside the indicator (Internal) or to be fetched from the Enraf field bus (External). Internal (MPU, HPU, or OPU option board installed) External Exit Exit protection level.

  • Page 11: Operation

    For operation of the display and the information on it, refer to the instruction manual of the applicable level gauge or 877 FDI. Below, only an overview is given which display formats gives information about the 862 MIT Multi element Interface Thermo sensor converter / 864 MTT Multi Thermo sensor Thermometer.

  • Page 12: Maintenance And Trouble Shooting

    Refer to section 1.3 Measuring sequence instrument. If one element is detected absent it could very well mean that the thermocouple wiring to the 862 MIT is not correct connected or the FET switch in the 862 MIT is not correct working.

  • Page 13: Temperature Pointer (Items Vp And Vv)

    Example: VP=22.03: value pointer loaded to request the Pt100 element resistance Temperature pointer value Temperature pointer value; standard floating point format. This item hold the value requested by item VP (refer to table above). Example: the requested Pt100 element resistance. Instruction manual 862 MIT Page 13...

  • Page 14: Appendix Aascii Table

    Appendix Appendix A ASCII table Page 14...

  • Page 15: Appendix B Related Documents

    Installation guide 873 SmartRadar Control Unit & Antenna Unit Instruction manual 873 SmartRadar Installation guide 877 FDI Field Display & Interface Instruction manual 877 FDI Field Display & Interface Item documentation for Enraf series 854 level gauges, 873 SmartRadar, 877 FDI Instruction manual 862 MIT Page 15...

  • Page 16: Index

    Index 862 MIT ....... . 5 Last fatal HPU / OPU error ....11 864 MTT .

This manual is also suitable for:

864 mtt

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