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enraf 864 MTT User Manual

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Instruction manual 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
Fax : +31 15 2701 111
E-mail : info@enraf.nl
Website : http://www.enraf.com
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enraf 864 MTT Specifications

General IconGeneral
Model864 MTT
CategoryMeasuring Instruments
Power Supply24 VDC
ApplicationLevel and temperature measurement in storage tanks
OutputHART
Operating Temperature-40°C to +60°C
Protection ClassIP66
CertificationsATEX, IECEx
TypeTank Gauging System

Summary

Preface

Safety and prevention of damage

Refer to safety chapter for instrument and personal safety aspects and conventions.

EC declaration of conformity

Instrument conformity with EC Council Directive 89/336/EEC and CE marking provisions.

Legal aspects

Enraf B.V. disclaims responsibility for injury or damage due to deviations from prescribed procedures.

Additional information

Contact Enraf or representative for further information.

Introduction

Product information

Description of the 862 MIT unit as a solid state electronic element selector for MTT.

Operating principle

Explanation of the 864 MTT with 16 spot elements and temperature calculation.

Measuring sequence

Details the measurement cycle of the 862 MIT, including resistance and voltage measurements.

Commissioning

Checks before starting commissioning

Pre-commissioning checks including connections, grounding, and length verification.

Selecting temperature dimension

Configuration of temperature units (Celsius or Fahrenheit) for data display.

Tank and temperature probe data

Additional settings for an 877 FDI

Operation

Display

Overview of display formats showing product level, gas temperature, and status.

Data items and error codes

Summary of available data items for temperature and system status, plus error codes.

Maintenance and trouble shooting

Temperature error codes (item EM)

List of recent temperature errors encountered by MPU, HPU, or OPU boards.

Temperature status request (item MQ)

Explanation of four-byte status information for temperature data.

Temperature pointer (items VP and VV)

Appendix A ASCII table

Appendix B Related documents

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