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KROHNE LT40 F User Manual

KROHNE LT40 F
32 pages
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Reed-chain level transmitter for
the BM26A series bypass level indicator
Supplementary Instructions for UKEX applications
LT40 C/F
Supplementary Instructions
© KROHNE 10/2021 - 4009051601 - AD UKEX LT40 R01 en
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KROHNE LT40 F Specifications

General IconGeneral
TypeLevel Transmitter
ApplicationLiquids and slurries
Process Temperature-40…+150°C / -40…+302°F
Process Pressure-1…40 barg / -14.5…580 psig
Accuracy±2 mm
Output4-20 mA HART
Power Supply12-30 V DC
Housing MaterialAluminium
Process ConnectionFlanged
ApprovalsATEX, IECEx, FM, CSA

Summary

General Safety Information

Scope and Device Overview

Defines document scope and provides a basic description of the device.

Standards and Approvals

Lists relevant standards and approvals for the device's hazardous area certification.

Device Categories and Nameplate

Details device categories (Ex ia, Ex db) and explains nameplate markings.

Installation

Installation Precautions and Safety

Covers general safety notes, special conditions, and electrostatic discharge warnings during installation.

Operating Conditions and Temperature Limits

Specifies ambient and service temperature ranges and limits for safe operation.

Temperature Limits for Compact Version (LT40 C)

Provides maximum process and ambient temperature limits for LT40 C based on temperature class.

Temperature Limits for Remote Version (LT40 F)

Provides maximum process and ambient temperature limits for LT40 F based on temperature class.

Electrical Connections

General Electrical Safety Notes

Outlines essential safety warnings and recommendations for electrical wiring.

Terminal Compartment and Tightening

Details terminal compartment operations and tightening capacity.

Equipotential Bonding System

Covers requirements for connecting the device to the equipotential bonding system for safety.

Ex i Version Electrical Specifications

Lists maximum intrinsically safe values for Ex i circuits and connection guidelines.

Ex d Version Wiring and Data

Provides wiring instructions for Ex d versions and relevant electrical data.

Start-Up

Pre-Power Up Safety Checks

Details crucial safety checks required before supplying electrical power to the device.

Service and Maintenance

Maintenance, Cleaning, and Repairs

Covers periodic maintenance, cleaning procedures, and safety precautions for repairs.

Device Removal and Replacement

Explains how to remove the device and replace specific transmitter versions.

Manufacturer Contact and Return Procedures

Provides manufacturer details and instructions for returning the device for service.

Returned Device Safety Declaration

Offers a form to certify the safety of a returned device for handling.

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