Tecfluid AD Series User manual
R-MI-AD15 Rev.: 3 English version
Serie AD
Flow switch and indicator
Instructions manual
The art of measuring
2
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
3
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
4
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
5
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.
6
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
BSP NPT
7
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:
8
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
9
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).
10
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
This manual suits for next models
2
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