Tecfluid AD Series Manuale utente

R-MI-AD15 Rev.: 3 English version

Serie AD

Flow switch and indicator

Instructions manual

The art of measuring

Thank you for choosing a product from Tecﬂuid S.A.

This instruction manual allows the installation, conﬁguration,

programming and maintenance. It is recommended to read it before

using the equipment.

• This document shall not be copied or disclosed in whole or in any

part by any means, without the written permission of Tecﬂuid S.A.

• Tecﬂuid S.A. reserve the right to make changes as deemed

necessary at any time and without notice, in order to improve the

quality and safety, with no obligation to update this manual.

• Make sure this manual goes to the end user.

• Keep this manual in a place where you can ﬁnd it when you need

it.

• In case of loss, ask for a new manual or download it directly from

our website www.tecﬂuid.com Downloads section.

• Any deviation from the procedures described in this instruction

manual, may cause user safety risks, damage of the unit or cause

errors in the equipment performance.

• Do not modify the equipment without permission. Tecﬂuid S.A. are

not responsible for any problems caused by a change not

allowed. If you need to modify the equipment for any reason,

PREFACE

WARNINGS

TABLE OF CONTENTS

SERIES AD

1 INTRODUCTION ........................................................................... 5

2 WORKING PRINCIPLE ................................................................... 5

3 RECEPTION .................................................................................. 7

4 INSTALLATION ............................................................................. 7

1A / 2A LIMIT SWITCH

5 INTRODUCTION ........................................................................... 8

5.1 Set point adjusment ............................................................ 8

5.2 Electrical connection ........................................................... 9

AMD LIMIT SWITCH

6 INTRODUCTION ........................................................................... 10

7 OPERATION ................................................................................. 10

8 MOUNTING THE LIMIT SWITCH IN AN EXISTING EQUIPMENT ....... 11

8.1 Kit contents ......................................................................... 11

8.2 Preparing the kit ................................................................. 11

8.3 Assembling the AMD kit ...................................................... 12

8.4 Switching point adjustment ................................................. 13

8.5 Electrical connection ........................................................... 14

8.6 Mounting ........................................................................... 14

9 ELECTRICAL CONNECTION .......................................................... 14

TH6 TRANSMITTERS

10 INTRODUCTION ........................................................................... 15

11 MODELS ...................................................................................... 15

11.1 TH6 ................................................................................... 15

11.2 TH6H ................................................................................. 15

12 ELECTRICAL CONNECTION .......................................................... 15

12.1 Power supply and analog output ......................................... 16

13 4-WIRE CONNECTION .................................................................. 16

14 HART TRANSMITTERS ................................................................. 17

14.1 Additional functions with HART communication .................... 17

14.2 HART communication characteristics ................................... 17

15 ”WRITE PROTECT” ....................................................................... 18

16 MAINTENANCE ............................................................................ 19

16.1 Series AD .......................................................................... 19

16.2 Potential problems with the indicator housing ........................ 19

16.2.1 The indicator pointer rubs on the reading scale ......... 19

16.2.2 Deviation of the zero on the scale ............................ 19

16.3 AMD limit switch maintenance ............................................. 20

16.3.1 Electrical veriﬁcation ................................................ 20

16.4 TH6 transmitter maintenance ............................................. 20

17 TECHNICAL CHARACTERISTICS ................................................... 21

17.1 Series AD ........................................................................... 21

17.2 1A / 2A limit switch ............................................................. 21

17.3 AMD limit switch ................................................................. 21

17.4 TH6 transmitter .................................................................. 21

17.4.1 Power supply .......................................................... 21

17.4.2 Outputs .................................................................. 21

17.4.3 General characteristics ............................................ 21

18 SAFETY INSTRUCTIONS ............................................................... 22

18.1 Pressure equipment directive .............................................. 22

18.2 Certiﬁcate of conformity TR CU (EAC marking) ..................... 22

19 ADDITIONAL INSTRUCTIONS FOR THE ATEX VERSION ................. 23

19.1 Non-metallic parts .............................................................. 23

19.2 Connecting conductive parts to earth .................................. 23

19.3 AMD limit switch ................................................................. .24

19.4 TH6 transmitters ................................................................. 24

19.5 Marking .............................................................................. 25

20 FLOW RANGES ............................................................................ 25

21 DIMENSIONS ............................................................................... 26

22 ATEX CERTIFICATE ...................................................................... 28

23 DECLARATIONS OF CONFORMITY ACCORDING TO ATEX ............ 31

SERIES AD

1 INTRODUCTION

The series AD of ﬂow switches and indicators are ﬂowmeters for liquids and gases.

They are very robust instruments prepared to work under extreme conditions.

They can ﬁt local ﬂow rate indication by means of magnetic coupling, with scales calibrated

in l/h, m3/h, kg/h, t/h, %, etc.

They can ﬁt switches or electronic transmitters that allow to detect a speciﬁc ﬂow rate and

provide a ﬂow rate signal to a remote device.

2 WORKING PRINCIPLE

A spring C keeps a calibrated disc B at rest. When a ﬂuid ﬂows at a certain velocity, it

pushes the disc B, forcing its displacement to an equilibrium point.

The distance covered by B depends on:

•The force of the ﬂuid ﬂow F.

•The ratio of the areas A and B.

•The opposing force of the spring C.

The equilibrium between the forces F and that generated by C deﬁnes the position of the

calibrated disc B, equivalent to the ﬂow rate.

The calibrated disc B has a magnet M. The magnetic ﬁeld acts on the limit switches and/or

the local indicator.

The ADI15 model ﬁts a magnetic ﬂow indicator system using a pointer on a graduated scale.

It can also ﬁt the same limit switches as in AD15 model as well as the AMD inductive limit

switches.

The AD15 model ﬁts 1 or 2 reed based limit switches.

BSP NPT

3 RECEPTION

The series AD flowmeters are supplied conveniently packaged for their protection during

transportation and storage, together with their instructions manual for installation and

operation.

The instruments are supplied tested in our calibration rigs, ready for installation and service.

Before installing the flowmeter, remove all the blocking elements.

For models ADI, with the instrument in its working position, move the disc and check that

the indicating needle moves all over the scale and returns to zero.

4 INSTALLATION

If the ﬂow switch model is AD15, it should be installed in a pipe so that the arrow on the label

points towards the ﬂuid direction.

If it is an ADI15 model, the ﬂow direction should coincide with that indicated on the scale.

The four possible positions are:

The "0" on the scale indicates the ﬂuid inlet on the meter, and the end of the scale indicates

the ﬂuid outlet.

1A / 2A LIMIT SWITCH

5 INTRODUCTION

It is a SPDT reed type switch that is used to generate an alarm or an operation when the

circulating ﬂow reaches a certain value.

It consists of a bistable reed sensor (SPDT), in other words, when the ﬂow exceeds the set

point the sensor changes its state and maintains it until the ﬂow decreases below that value.

In the same instrument, there may be one or two sensors, depending on the points to be

detected.

5.1 Set point adjustment

The switch housing has a mark on the side next to the graduated scale. The position of this

mark indicates the value at which the switch will be activated.

To adjust the position, loosen the ﬁxing screw and slide the switch through the slot until the

set point coincides with the desired ﬂow rate on the scale.

Fixing

screw

Switching

mark

5.2 Electrical connection

For the electrical installation, a multi-conductor cable should be used to obtain a good seal

with the cable gland. The connector is provided with a PG 7 cable gland, suitable for a 4.5

to 7 mm outside diameter cable.

Terminal 1: Common

Terminal 2: Normally open (NO)

Terminal 3: Normally closed (NC)

Earth terminal: Not connected

conexión

The electrical installation should provide a fuse or circuit breaker to protect the reed switch

from overloads.

When installing the connector, make sure that the cable gland closes over the cable and that

the connector with the rubber seal is well screwed down to maintain its IP rating.

Make sure that the contact rating is not exceeded (see section 17.2 in page 21). If high loads

are to be switched, use an auxiliary relay.

When using inductive loads, such as relays or electro-valve coils, surge arresters should be

installed to protect the reed contacts (VDR in case of AC supply and free willing diodes in

case of DC supply).

AMD LIMIT SWITCH

6 INTRODUCTION

The AMD limit switch can be used to generate an alarm or an operation when the ﬂow rate

that the instrument is measuring reaches a preset value on the scale plate.

The AMD limit switch consists of a NAMUR slot type inductive sensor, that is actuated by a

vane. Given that there is no physical contact in the operation, the limit switch has no inﬂuence

on the indicator needle movement.

An instrument can be equipped with one or two sensors, depending on the number of points

to be detected. A NAMUR ampliﬁer with a relay output can be supplied as an option.

7 OPERATION

The indicator needle moves together with the vane mounted on its shaft. When the vane

enters into the slot of the sensor, the limit switch changes its state.

The sensor is mounted on a support which includes a needle that indicates the switching

position. The needle, that is below the scale plate, can be seen through the scale slot.

Switching

points

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