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enraf 862 MIT 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 862 MIT Specifications

General IconGeneral
Model862 MIT
CategoryMeasuring Instruments
ManufacturerEnraf
Power Supply24 VDC
MaterialStainless steel
TypeLevel Transmitter
ApplicationTank level measurement
Output SignalHART
Operating Temperature-40°C to +70 °C
Protection ClassIP66

Summary

Preface

Safety and prevention of damage

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

EC declaration of conformity

Instrument conforms to EC Council Directive 89/336/EEC and Low Voltage Directive 73/23/EEC.

Legal aspects

Manual is copyright of Enraf B.V. Disclaims responsibility for injury or damage from deviations.

Additional information

Contact Enraf or representative for additional information.

1 Introduction

1.1 Product information

Describes the 862 MIT as a solid-state electronic selector for interfacing an 864 MTT.

1.2 Operating principle

Explains how the 864 MTT's spot elements and optional board calculate average temperatures.

1.3 Measuring sequence

Details the 862 MIT's measurement cycle for auto-calibration.

2 Commissioning

2.1 Checks before starting commissioning

Includes warnings and checks for connections, grounding, and physical dimensions.

2.2 Selecting temperature dimension

Details how to set the temperature dimension (Celsius or Fahrenheit).

2.3 Tank and temperature probe data

Defines tank and temperature probe parameters like reference resistance, element type, and number of elements.

2.4 Additional settings for an 877 FDI

Configures specific settings for the 877 FDI, including option board and temperature transmission.

3 Operation

3.1 Display

Provides an overview of display formats for the 862 MIT and 864 MTT.

3.2 Data items and error codes

Summarizes available data items and error codes for operational status.

4 Maintenance and trouble shooting

4.1 Temperature error codes (item EM)

Lists recent temperature error codes encountered by MPU, HPU, or OPU boards.

4.2 Temperature status request (item MQ)

Explains the four-byte status information for temperature data.

4.3 Temperature pointer (items VP and VV)

Details how to select and request calculation results using VP and VV items.

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