SMAR SR301 Manuel

Introduction

III

INTRODUCTION

The SR301 is a Remote Seal that allows the pressure transmitter to make measures in situations

where the immediate contact of the transmitter diaphragm with the process fluid it is not allowed.

The remote seal is made up by one connection with the diaphragm and one capillary connection

with filling fluid. The filling fluid transfers the pressure measured in the process fluid to the

transmitter sensor. The capillary connection links the seal diaphragm to the transmitter.

The remote seals available in the SR301 series are: Flanged “T” Type (SR301T), Threaded

(SR301R), Pancake (SR301P) both models having an optional flush connection, Sanitary (SR301S),

and Flanged with Extension (SR301E).

The SR301 is assembled with gauge and differential pressure transmitters. When used in food

applications the connections are sanitary type. Level models are also available.

SR301

The typical applications of the remote seal on the transmitter are:

•For corrosive process fluid;

•For viscous process fluid or with solids in suspension;

•The process fluid may freeze, crystallize or solidify;

•Processes that require easy cleaning and others.

The choice of the remote seal must be based on the recommendations of this manual.

The quality of measurement is important, because there is a growing demand for better electronic

accuracy and stability on transmitters.

Some remote seal characteristics influence measurement, as capillary length, work temperature,

response time, correct seal model and type of installation.

For example, regarding the remote seal model, it is common practice to standardize the seal type

and the capillary length in the longest extension offered by supplier, aiming to guarantee

interchangeability in the entire plant without considering the application characteristics for each point

of measurement.

SR301 - Operation & Maintenance Instructions Manual

As for the installation, not always the device life span is taken into consideration, as it suffers

various mechanical aggressions as line and tank vibration, high agitation, or turbulence of the

process fluid, free or inadequately supported capillaries.

There are problems also in relation to mechanical assembly, inadequate installation of gaskets, plug

point centralization and alignment, excessive squeeze, or bad distribution of the holding bolts.

Thus, in choosing the seal size these factors must be considered according to each case to

guarantee excellent performance and long-life span.

This manual was made to help install, operate, and maintain the SR301. It contains information

about transmitter/seal assembly, organized in the following categories:

•Installation;

•Selection;

•Operation;

•Maintenance;

•Examples;

•Types of Seal and Ordering Code.

Read these instructions carefully to get the most out of the SR301.

Introduction

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

CHAPTER 1 - INSTALLATION .....................................................................................................1.1

APPLICATION .........................................................................................................................................................1.1

GENERAL RECOMMENDATIONS FOR REMOTE SEAL USE...............................................................................1.1

TYPE OF REMOTE SEAL........................................................................................................................................1.2

RECEIVING AND HANDLING .................................................................................................................................1.2

MOUNTING OF TRANSMITTER WITH REMOTE SEAL.........................................................................................1.2

CHAPTER 2 - SELECTION...........................................................................................................2.1

PROCEDURE FOR REMOTE SEAL SPECIFICATION...........................................................................................2.1

CHOOSING THE IDEAL ASSEMBLY FOR APPLICATION.....................................................................................2.2

TRANSMITTERS RANGE FOR REMOTE SEAL APPLICATION............................................................................2.3

DIAPHRAGM MATERIAL ........................................................................................................................................2.4

FILLING FLUIDS......................................................................................................................................................2.5

TEMPERATURE ERROR PRESENTED BY SEAL .................................................................................................2.6

CALCULATION OF TEMPERATURE ERRORS......................................................................................................2.7

EQUATIONS..................................................................................................................................................................... 2.7

DETERMINATION OF THE SEAL/LEVEL ERROR FOR HIGH (H) OR LOW (L) SIDES................................................... 2.8

ERRORFOR TWOSEALS INFLUENCEDBY TEMPERATURE SYMMETRY................................................................. 2.8

ASSEMBLY ACCURACY.......................................................................................................................................2.13

TOTAL PROBABLE ASSEMBLY ERROR.............................................................................................................2.14

REMOTE SEAL RESPONSE TIME .......................................................................................................................2.14

CALCULATION OF REMOTE SEAL RESPONSE TIME .......................................................................................2.15

CAPILLARY LENGTH............................................................................................................................................2.17

ERROR GUIDE TREND FOR TRANSMITTER ASSEMBLED WITH REMOTE SEAL ..........................................2.21

CASE1–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (1:1)........................................................... 2.22

CASE2–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (1:1)........................................................... 2.23

CASE3–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (1:1)........................................................... 2.24

CASE4–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (10:1)......................................................... 2.25

CASE5–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (10:1)......................................................... 2.26

CASE6–TPE %OF THE SPAN WITH CALIBRATIONINRANGEABILITY (10:1)......................................................... 2.27

CHAPTER 3 - OPERATION..........................................................................................................3.1

OPERATION OF THE REMOTE SEAL SENSOR....................................................................................................3.1

OPERATION START UP .........................................................................................................................................3.1

CALIBRATION.........................................................................................................................................................3.1

OUTPUT SIGNAL TEST AND SETTING........................................................................................................................... 3.1

RANGE BEGINNINGCHANGE........................................................................................................................................ 3.2

SPANCHANGE ON DIFFERENTIAL ANDFLOW PRESSURE TRANSMITTERS........................................................... 3.2

LEVEL TRANSMITTER SPAN CHANGE.......................................................................................................................... 3.3

CAPILLARIES FILLING FLUID EFFECT........................................................................................................................... 3.3

CHAPTER 4 - MAINTENANCE.....................................................................................................4.1

REMOTE SEAL CLEANING ....................................................................................................................................4.1

DISASSEMBLING AND PACKING THE REMOTE SEAL TRANSMITTER.............................................................4.1

COMPONENT REPLACEMENT..............................................................................................................................4.1

RETURN OF MATERIALS.......................................................................................................................................4.1

REMOTE SEAL SPARE PARTS..............................................................................................................................4.2

CHAPTER 5 - EXAMPLES............................................................................................................5.1

EXAMPLE 1 .............................................................................................................................................................5.1

ERRORCALCULATIONBY TEMPERATURE.................................................................................................................. 5.3

CALCULATIONOF SEAL/LEVEL ERROR ....................................................................................................................... 5.5

CALCULATIONOF THE TRANSMITTER ACCURACY WITH SEAL/LEVEL.................................................................... 5.6

CALCULATIONOF THE GLOBAL ERROROF TRANSMITTER ASSEMBLING WITH SEALS/LEVEL............................ 5.6

CALCULATIONOF THE RESPONSE TIME..................................................................................................................... 5.7

CHECKINGTHE CAPILLARY LENGTH ........................................................................................................................... 5.7

Introduction

VII

EXAMPLE 2 .............................................................................................................................................................5.9

ERRORCALCULATIONBY TEMPERATURE................................................................................................................ 5.11

CALCULATIONOF SEAL/LEVEL ERROR ..................................................................................................................... 5.11

CALCULATIONOF THE TRANSMITTER ACCURACY WITH SEAL/LEVEL.................................................................. 5.12

CALCULATIONOF THE GLOBAL ERROROF TRANSMITTER ASSEMBLING WITH SEALS/LEVEL.......................... 5.12

CALCULATIONOF THE RESPONSE TIME................................................................................................................... 5.12

CHECKINGTHE CAPILLARY LENGTH ......................................................................................................................... 5.13

CHAPTER 6 - TYPE OF SEAL AND ORDERING CODE .............................................................6.1

“T” TYPE FLANGED REMOTE SEAL -SR301T......................................................................................................6.1

DESCRIPTION ................................................................................................................................................................. 6.1

FLANGED REMOTE SEAL WITH EXTENSION -SR301E......................................................................................6.2

DESCRIPTION ................................................................................................................................................................. 6.2

THREADED REMOTE SEAL –SR301R..................................................................................................................6.4

DESCRIPTION ................................................................................................................................................................. 6.4

SANITARY REMOTE SEAL –SR301S....................................................................................................................6.5

DESCRIPTION ................................................................................................................................................................. 6.5

PANCAKE REMOTE SEAL -SR301P .....................................................................................................................6.6

DESCRIPTION ................................................................................................................................................................. 6.6

TECHNICAL DATA ..................................................................................................................................................6.7

DIAPHRAGM HYDROGEN MIGRATION ..............................................................................................................6.11

STEPS TOFACILITATE THE MIGRATION .................................................................................................................... 6.11

FORM TOINHIBIT THE HYDROGEN MIGRATION........................................................................................................ 6.11

GOLD PLATED STAINLESS STEEL DIAPHRAGM ..............................................................................................6.11

RESISTANCE TODIAPHRAGM HYDROGENMIGRATION .......................................................................................... 6.11

APPLICATION WITH HALAR FOR SEALS AND LEVELS.....................................................................................6.12

TECHNICAL SPECIFICATION ....................................................................................................................................... 6.12

PERFORMANCE SPECIFICATION................................................................................................................................ 6.12

TPE –TOTAL PROBABLE ERROR (SOFTWARE)...............................................................................................6.13

DIMENSIONS ........................................................................................................................................................6.14

SR301T (RF/FF/RTJ) -“T” TYPE FLANGED REMOTE SEAL ANDSR301E (RF/FF/RTJ) -FLANGED REMOTE SEAL

WITHEXTENSION(INTEGRAL FLANGE)..................................................................................................................... 6.14

SR301R –THREADED REMOTE SEAL......................................................................................................................... 6.16

SR301P –PANCAKE REMOTE SEAL WITHOUT EXTENSION .................................................................................... 6.17

LOWER HOUSING......................................................................................................................................................... 6.18

SR301S –SANITARY REMOTE SEAL WITH EXTENSION............................................................................................ 6.19

SR301S –SANITARY REMOTE SEAL WITHOUT EXTENSION.................................................................................... 6.20

APPENDIX A –SERVICE REQUEST FORM............................................................................... A.1

SR301 - Operation & Maintenance Instructions Manual

VIII

Chapter 1

1.1

INSTALLATION

Application

The SMAR Remote Seals must be used when:

The process fluid is corrosive, and the transmitter must be protected from this;

The process fluid contains solids in suspension or is viscous enough to block the transmitter

connections;

The process fluid may freeze, crystallize or solidify inside the transmitter;

It is necessary to maintain aseptic or sanitary conditions, as well as cleaning ease; and

The process temperature is higher than 100°C.

The LD301 transmitter series manufactured by SMAR and used with remote seal keeps the

characteristics of the insulated transmitters, such as external zero and span adjustments or via

programmer, facilitating the device installation, functioning and maintenance.

General Recommendations for Remote Seal Use

The seals require a special construction for pressure below atmosphere (vacuum). Therefore,

Datasheet must inform when they will be used in this condition.

The temperature variation may cause unacceptable errors in transmitter reading. To minimize this

effect, see the necessary recommendations in Chapter 2 - "Temperature Error Presented by Seal".

For applications in corrosive environments, select materials compatible for contact with the process

fluid. However, also consider materials not in contact with the process but subject to corrosive

atmospheres or the spatter of fluids from the corrosion process.

The capillary length, the diaphragm sensitivity and the characteristics of the fill fluid (the coefficient

of thermic expansion and the density) present error in the measurement making impracticable the

application of the remote seal for ranges below to 0-625 mmH2O.

Should it be possible to empty the fill fluid due to puncture of the insulator diaphragm, verifies if its

volume (less than 5 ml) may contaminate the process of inadmissible form. If this happens requests

a seal with fill fluid compatible with the process.

Choose the fill fluid that does not evaporate at the pressure and process temperature conditions.

Type of Remote Seal

The types of remote seal, as well as the dimensions available are presented in the Chapter 6 of this

Manual - "Type of Seal and Ordering Code".

Receiving and Handling

•Verify if the data plate is according to the order;

•The transmitter and the remote seal, with its respective capillary, must be in the package until

installation to prevent possible damages;

•The set must not be handled by the capillary;

•The sealed bolts must not be handled. If this is done, the remote seal can be permanently

damaged and lose the manufacturer’s warranty.

SR301 - Operation & Maintenance Instructions Manual

1.2

Mounting of Transmitter with Remote Seal

In the Transmitter Manual see the suggested mounting positions. The Transmitter and the Remote

Seal can be mounted according to the Figure 2.1 of Chapter 2 of this Manual.

The Remote Seals must be installed so that the process fluid wets all its surface. Installations that

can provoke the deposition of any incrustation on the diaphragm must be avoided.

Choose a place free from mechanical shocks (seal and transmitter) that facilitates access to the

measuring points. The ambient temperature must be within the limits allowed by the Transmitter

Manual.

Use a valve in the process connection, before the seal, as this facilitates the transmitter calibration

and the seal maintenance.

The maximum upper or lower height allowed for the transmitter on the remote seal, depends on the

density of the seal fill fluid and the pressure on it. If this height is exceeded, it may cause saturation

in the transmitter due to difference of the hydrostatic columns in both sides.

The correct heights of the transmitter, in relation to the seal, are shown in Table 2.3 of Chapter 2 of

this Manual.

The capillaries must be held firm to avoid oscillations in the reading.

Choose an installation site lowly sensitive to temperature variation or, instead, keep the temperature

equal in both sides of the seal.

The minimum radius of the capillary bending is 70mm. To prevent damages, avoid twisting and

folding the capillary.

The connections for the lower "L" side and higher "H" side are indicated in the transmitter by letters

"L" and "H".

In the seals horizontally mounted, the gasket must be centralized and not be in contact with the

diaphragm. Hold the set in the counterflange by applying equal torques in the bolts.

ATTENTION

In hot environment, the transmitter and the seals must be installed in a way to prevent the

exposition to the sun, as much as possible. Also avoid the installation closed with lines and

vases subject to high temperatures. The use of sun protector or heat shield to protect both

devices from external heat source is recommended.

The temperature increase, due to direct exposition to the sun, can cause a zero deviation,

mainly if one of the sides will be exposed. The seal, due to its metal construction, can have an

increase of 60ºC in the temperature when exposed to the sun. For example, a transmitter with a

remote seal of 2", calibrated in 1000 mmH2O, with capillary of 1m, exposed to 20ºC of variation

will have an error of 49 mmH20 (4.9%). Check Chapter 2 for more information about

temperature effect.

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