SMAR LD290 Manual de usuario

Introduction

III

INTRODUCTION

The LD290 is a pressure transmitter for gauge and level measurement. It is based on a field-proven

capacitive sensor that provides reliable operation and high performance.

A liquid crystal display can be added to provide additional operation and local indication. Its

microprocessed electronic circuit permits a total interchangeability with Smar’s capacitive sensors. It

automatically corrects the sensors’ characteristic changes caused by temperature variations.

The LD290, besides the normal functions offered by other transmitters, offers the following

functions:

LOCAL ADJUSTMENT –Adjust through magnet tool the lower and upper value, input/output

function, and indication.

Writing protection via hardware.

Get the best results of the LD290 by carefully reading these instructions.

Smar’s pressure transmitters are protected by U.S. patents 6,433,791 and 6,621,443.

LD290 - Operation and Maintenance Instruction Manual

NOTE

This manual is compatible with version 7.XX.YY, where 7 indicates the software version,

XX software release, and YY software emission. The indication 7.XX.YY means that this

manual is compatible with any release of software version 7.

Waiver of responsibility

The contents of this manual abides by the hardware and software used on the current equipment

version. Eventually there may occur divergencies between this manual and the equipment. The

information from this document are periodically reviewed and the necessary or identified corrections

will be included in the following editions. Suggestions for their improvement are welcome.

Warning

For more objectivity and clarity, this manual does not contain all the detailed information on the

product and, in addition, it does not cover every possible mounting, operation or maintenance

cases.

Before installing and utilizing the equipment, check if the model of the acquired equipment complies

with the technical requirements for the application. This checking is the user’s responsibility.

If the user needs more information, or on the event of specific problems not specified or treated in

this manual, the information should be sought from Smar. Furthermore, the user recognizes that the

contents of this manual by no means modify past or present agreements, confirmation or judicial

relationship, in whole or in part.

All of Smar’s obligation result from the purchasing agreement signed between the parties, which

includes the complete and sole valid warranty term. Contractual clauses related to the warranty are

not limited nor extended by virtue of the technical information contained in this manual.

Only qualified personnel are allowed to participate in the activities of mounting, electrical connection,

startup and maintenance of the equipment. Qualified personnel are understood to be the persons

familiar with the mounting, electrical connection, startup and operation of the equipment or other

similar apparatus that are technically fit for their work. Smar provides specific training to instruct and

qualify such professionals. However, each country must comply with the local safety procedures,

legal provisions and regulations for the mounting and operation of electrical installations, as well as

with the laws and regulations on classified areas, such as intrinsic safety, explosion proof, increased

safety and instrumented safety systems, among others.

The user is responsible for the incorrect or inadequate handling of equipments run with pneumatic

or hydraulic pressure or, still, subject to corrosive, aggressive or combustible products, since their

utilization may cause severe bodily harm and/or material damages.

The field equipment referred to in this manual, when acquired for classified or hazardous areas, has

its certification void when having its parts replaced or interchanged without functional and approval

tests by Smar or any of Smar authorized dealers, which are the competent companies for certifying

that the equipment in its entirety meets the applicable standards and regulations. The same is true

when converting the equipment of a communication protocol to another. In this case, it is necessary

sending the equipment to Smar or any of its authorized dealer. Moreover, the certificates are

different and the user is responsible for their correct use.

Always respect the instructions provided in the Manual. Smar is not responsible for any losses

and/or damages resulting from the inadequate use of its equipments. It is the user’s responsibility to

know and apply the safety practices in his country.

Table of Contents

TABLE OF CONTENTS

SECTION 1 - INSTALLATION .................................................................................................................. 1.1

GENERAL.....................................................................................................................................................................1.1

MOUNTING..................................................................................................................................................................1.1

ELECTRONIC HOUSING.............................................................................................................................................1.8

WIRING ........................................................................................................................................................................1.8

INSTALLATION IN HAZARDOUS AREAS ................................................................................................................1.11

EXPLOSION/FLAME PROOF....................................................................................................................................1.11

INTRINSICALLY SAFE ..............................................................................................................................................1.11

SECTION 2 - OPERATION....................................................................................................................... 2.1

FUNCTIONAL DESCRIPTION - SENSOR ..................................................................................................................2.1

FUNCTIONAL DESCRIPTION - HARDWARE.............................................................................................................2.2

THE DISPLAY ..............................................................................................................................................................2.4

SECTION 3 - PROGRAMMING USING LOCAL ADJUSTMENT.............................................................. 3.1

THE MAGNETIC TOOL................................................................................................................................................3.1

COMPLETE LOCAL ADJUSTMENT............................................................................................................................3.2

SIMPLE LOCAL ADJUSTMENT ..................................................................................................................................3.2

ZERO AND SPAN RERANGING .................................................................................................................................3.2

COMPLETE LOCAL ADJUSTMENT............................................................................................................................3.3

LOCAL PROGRAMMING TREE..................................................................................................................................3.3

CONFIGURATION [CONF]..........................................................................................................................................3.3

CONFIGURATION BRANCH (CONF) .........................................................................................................................3.4

RANGE (RANGE).........................................................................................................................................................3.5

RANGE BRANCH (RANGE) ........................................................................................................................................3.5

FUNCTION (FUNCT) ...................................................................................................................................................3.7

PRESSURE TRIM [TRIM]............................................................................................................................................3.8

ESCAPE LOCAL ADJUSTMENT [ESC] ......................................................................................................................3.9

SECTION 4 - MAINTENANCE PROCEDURES ........................................................................................ 4.1

GENERAL.....................................................................................................................................................................4.1

DIAGNOSTIC BY DISPLAY.........................................................................................................................................4.1

DISASSEMBLY PROCEDURE....................................................................................................................................4.2

SENSOR.................................................................................................................................................................................. 4.2

ELECTRONIC CIRCUIT........................................................................................................................................................... 4.3

REASSEMBLY PROCEDURE.....................................................................................................................................4.3

SENSOR.................................................................................................................................................................................. 4.3

ELECTRONIC CIRCUIT........................................................................................................................................................... 4.3

INTERCHANGEABILITY..............................................................................................................................................4.4

RETURNING MATERIALS...........................................................................................................................................4.4

ORDERING CODE FOR HOUSING ............................................................................................................................4.7

ORDERING CODE FOR SENSOR..............................................................................................................................4.7

SECTION 5 - TECHNICAL CHARACTERISTICS..................................................................................... 5.1

ORDERING CODE.......................................................................................................................................................5.5

APPENDIX A - CERTIFICATIONS INFORMATIONS ...............................................................................A.1

EUROPEAN DIRECTIVE INFORMATION.................................................................................................................. A.1

HAZARDOUS LOCATIONS GENERAL INFORMATION ........................................................................................... A.1

HAZARDOUS LOCATIONS APPROVALS................................................................................................................. A.2

IDENTIFICATION PLATES AND CONTROL DRAWING ........................................................................................... A.6

APPENDIX B –SRF –SERVICE REQUEST FORM.................................................................................B.1

LD290 - Operation and Maintenance Instruction Manual

Section 1

1.1

INSTALLATION

General

NOTE

The installation carried out in hazardous areas should follow the recommendations of the

IEC60079-14 standard.

The overall accuracy ofa flow, level, or pressure measurementdepends on severalvariables.Although

the transmitter has an outstanding performance, proper installation is essential to maximize its

performance.

Among all factors, whichmay affect transmitter accuracy, environmentalconditionsarethemostdifficult

to control. There are, however, ways of reducing the effects of temperature, humidity and vibration.

The LD290 has a built-in temperature sensor to compensate for temperature variations. At the factory,

each transmitter is submitted to a temperature cycle, and the characteristics under different

temperatures are recorded in the transmitter memory. At the field, this feature minimizes the

temperature variation effect.

Locating the transmitter in areas protected from extreme environmental changes can minimize

temperature fluctuation effects.

In warm environments, the transmitter should be installed to avoid, as much as possible, direct

exposure to the sun. Installation close to lines and vessels subjected to high temperatures should also

be avoided. Use longer sections of impulse piping between tap and transmitter whenever the process

fluid is at high temperatures. Use of sunshades or heat shields to protect the transmitter from external

heat sources should be considered, if necessary.

Humidity is fatal to electronic circuits. In areas subjected to high relative humidity, the O-rings for the

electronic housing coversmust be correctlyplaced and the coversmustbecompletelyclosedbytighten

them by hand until you feel the O-rings being compressed. Do not use tools to close the covers.

Removal of the electronics cover in the field should be reduced to the minimum necessary, since each

time it is removed; the circuits are exposed to the humidity.

The electronic circuit is protected by a humidity proof coating, but frequent exposures to humidity may

affect the protection provided. It is also important to keep the covers tightenedin place. Everytime they

are removed, the threads are exposed to corrosion, since painting cannot protect these parts. Code-

approved sealing methods should be employed on conduit entering the transmitter. The unused outlet

connection should be plugged accordingly.

Although the transmitter isvirtually insensitive tovibration, installation close to pumps, turbinesorother

vibrating equipment should be avoided.

Proper winterization (freeze protection) should be employed to prevent freezing within the measuring

chamber, since this will result in an inoperative transmitter and could even damage the cell.

NOTE

When installing or storing the level transmitter, the diaphragm must be protected avoid scratching-

denting or perforation of its surface.

Mounting

The transmitter has been designed to be both rugged and lightweight at the same time. This make its

mounting easier mounting positions are shown in Figure 1.1.

Should the process fluid contain solids in suspension, install valves orrod-outfittingsat regularintervals

to clean out the pipes.

The pipes should be internally cleaned by using steam or compressed air, or by draining the line with

the process fluid, before such lines are connected to the transmitter (blow-down).

LD290 –Operation and Maintenance Instruction Manual

1.2

Figure 1.1 (a) –Dimensional Drawing and Mounting Position for LD290

Installation

1.3

Figure 1.1 (b) –Dimensional Drawing and Mounting Position for LD290 - Sanitary

LD290 –Operation and Maintenance Instruction Manual

1.4

Figure 1.1 (c) –Dimensional Drawing and Mounting Position for LD290 –Sanitary

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