Tecfluid TH7 User Manual
Transmitters TH7
Series SC250 / DP / LP
Instructions manual
R-MI-TH7 Rev.: 1 English version
PREFACE
Thank you for choosing the TH7 transmitter from Tecfluid S.A.
This instruction manual allows the connection, commissioning and
operation of the TH7 transmitter. It is recommended to read it before
using the equipment.
WARNINGS
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. reserves 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.
is not responsible for any problems caused by a change not
allowed. If you need to modify the equipment for any reason,
please contact us in advance.
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TABLE OF CONTENTS
1 INTRODUCTION ................................................................................... 4
2 MODELS ................................................................................................ 4
2.1 TH7 ............................................................................................. 4
2.2 TH7H .......................................................................................... 4
2.3 TH7T and TH7TH ...................................................................... 4
3 MOUNTING THE TRANSMITTER IN AN EXISTING EQUIPMENT ...... 4
3.1 Kit contents ............................................................................... 4
3.2 Preparing the kit ....................................................................... 5
3.3 Assembling the kit TH7 or TH7H ............................................. 5
3.4 Assembling the kit TH7T or TH7TH ........................................ 6
3.5 Electrical conection ................................................................. 6
3.6 Mounting ................................................................................... 7
4 ELECTRICAL CONNECTION ............................................................... 7
4.1 Power supply and analog output ............................................ 8
4.2 Digital output ............................................................................ 8
4.2 Reset input ................................................................................ 9
5 4-WIRE CONNECTION ......................................................................... 9
6 TRANSMITTERS WITH HART PROTOCOL ........................................ 10
6.1 Additional functions with HART communication .................. 11
6.2 HART communication characteristics ................................... 11
7 ”WRITE PROTECT” .............................................................................. 12
8 MAINTENANCE .................................................................................... 12
9 ASSOCIATED SOFTWARE WINSMETER TH7 ................................... 12
9.1 USB cable connection and drivers installation ..................... 12
9.2 Port connection ......................................................................... 13
9.3 Access to installation and programming ................................ 14
9.4 Visualization ............................................................................. 16
9.5 Firmware update ....................................................................... 17
10 TECHNICAL CHARACTERISTICS ........................................................ 18
10.1 Power supply ........................................................................... 18
10.2 Outputs ...................................................................................... 18
10.3 General characteristics ............................................................ 18
10.4 Safety characteristics .............................................................. 18
11 TROUBLESHOOTING .......................................................................... 19
3
1 INTRODUCTION
TH7 transmitters are microprocessed electronic position transducers. The instrument uses
the Hall effect to capture the field of a magnet. The resulting signal, after the microcontroller processing, is converted into a current signal of 4-20 mA in a 2-wire loop. This
signal is proportional to the flow rate or the level height inside a tank.
2 MODELS
2.1 TH7
It is a 4 to 20 mA transmitter proportional to flow rate that incorporates a synchronized
pulse output. 4 mA corresponds to beginning of the scale. 20 mA corresponds to full
scale. If the transmitter is installed in a flow meter (series SC250 / DP), the cut off value
can be programmed (see section 9.3 in page 16). By default, the cut off corresponds to
the first point on the scale after the zero point.
In the case of level measurement (LP series), the current range corresponds to the scale
at all the points. There is no cut off.
2.2 TH7H
It is a TH7 transmitter that incorporates HART protocol compatibility. With this protocol the
user can change the measuring range of the 4-20 mA loop, and data like flow rate and
accumulated volume.
2.3 TH7T and TH7TH
They are the equivalent models to those of the sections 2.1 and 2.2, but in addition they
include a 8-digit totalizer (7 entire numbers and 1 decimal).
3 MOUNTING THE TRANSMITTER IN AN EXISTING EQUIPMENT
When the transmitter is to be fitted to an existing device, please follow these steps.
3.1 Kit contents
The kit contains the following elements:
Kit TH7 or TH7H
Quantity Material Position
1
Transmitter
4 Screw DIN7985 M 3 x 4 A2 2
2 O-rings Ø 16 x 18,5 x 1,25 mm NBR-70 3
2 Cable gland IP68 4
2 Cable gland blanking plug 5
Kit TH7T or TH7TH
Quantity Material Position
1
Totalizer
2 Screw DIN7982 B-2,2 x 9 Nº2 A2 2
1
1
4
In the kits, the O-rings (3) and the blanking plugs (5) are not provided as loose parts. They
are incorporated in the cable glands (4).
3.2 Preparing the kit
Remove the cover, unscrewing the four screws "Allen" M5 and plastic washers, in the
back side of the indicator housing, using a 4 mm Allen key.
Slide the scale plate in the direction indicated in the figure, until it is released from the slot.
Ensure that the O-rings (3) are placed in the thread of the gland (4). If not, they should be
placed. Remove the plugs from the indicator box with a flat screwdriver and replace them
by the two cable glands.
The cable glands that are not expected to be used should be left with the blanking plug
(5) placed to preserve watertight.
3.3 Assembling the kit TH7 or TH7H
Screw the transmitter as shown in the figure.
5
3.4 Assembling the kit TH7T or TH7TH
Enter the circuit through the slot until it stops, and then screw it as shown in the figure.
The flat ribbon connecting the transmitter to the totalizer should be connected as in the
figure below.
3.5 Electrical connection
Do it according to section 4 of this manual.
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