Tecfluid CU Series Manuale utente
R-MI-CU100 Rev.: 2 English version
Series CU
Ultrasonic flowmeter
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,
please contact us in advance.
PREFACE
WARNINGS
3
TABLE OF CONTENTS
SERIES CU
1 INTRODUCTION ........................................................................... 6
2 INSTALLATION OF THE ELECTRONIC CONVERTER ...................... 6
2.1 Electrical connection ........................................................... 7
2.1.1 Power supply wiring ............................................... 8
2.1.2 Relay output wiring ................................................ 8
2.1.3 Analog output wiring ............................................... 9
2.1.4 Transducers wiring ................................................. 10
3 CONVERTER INTERFACE .............................................................. 11
4 MAIN MENU ................................................................................. 12
4.1 Passwords to access the menus ......................................... 12
5 TRANSDUCERS INSTALLATION .................................................... 14
5.1 Straight pipe run requirement .............................................. 14
5.2 Installation with the alignment guide .................................... 17
5.2.1 Straps preparation ................................................. 17
5.3 Fastening of the transducers ............................................... 17
5.4 Installation parameters ......................................................... 18
5.5 Language ........................................................................... 18
5.6 Transducer ......................................................................... 18
5.7 Units .................................................................................. 19
5.8 Pipe parameters ................................................................. 19
5.8.1 Outer diameter ...................................................... 19
5.8.2 Pipe material ......................................................... 20
5.8.3 Pipe thickness ....................................................... 20
5.8.4 Lining material ....................................................... 20
5.8.5 Lining thickness ..................................................... 21
5.9 Liquid ................................................................................ 21
5.10 Paths ................................................................................. 22
5.11 Installation and distance between the transducers ................ 23
5.12 Fixing the transducers ......................................................... 23
5.13 Signal strength ................................................................... 25
5.14 Distance ............................................................................ 25
4
5.15 Programs ........................................................................... 25
5.16 Transducers test ................................................................. 26
6 CONVERTER PROGRAMMING ...................................................... 26
6.1 Language ........................................................................... 27
6.2 Units .................................................................................. 27
6.3 Decimals ............................................................................ 28
6.4 Flow rate ............................................................................ 28
6.4.1 Cut off ................................................................... 28
6.4.2 Reversed flow rate .................................................. 28
6.4.3 Damping ................................................................ 29
6.4.4 Offset .................................................................... 29
6.5 Outputs .............................................................................. 31
6.5.1 Relay 1 and relay 2 ................................................. 31
6.5.2 Analog output ........................................................ 31
6.5.3 Configuration of the 4-20 mA output ....................... 32
6.5.4 Programming of the 4-20 mA output ....................... 32
6.5.5 Current calibration of 4 and 20 mA .......................... 32
6.6 Default screen ..................................................................... 33
6.7 Totalizer ............................................................................. 33
6.8 Backlight ............................................................................ 34
6.9 Programs ........................................................................... 34
7 SOFTWARE VERSION ................................................................... 34
8 SERIAL NUMBER .......................................................................... 35
9 DEFAULT SCREEN ........................................................................ 35
10 MAINTENANCE ............................................................................. 35
10.1 Fuse ................................................................................... 35
5
11 ASSOCIATED SOFTWARE WINSMETER CU .................................. 36
11.1 USB cable connection and drivers installation ...................... 36
11.2 Port connection ................................................................... 38
11.3 Access to installation and programming ............................... 38
11.4 Datalogger ......................................................................... 41
11.5 Visualization ....................................................................... 43
11.6 Simulation .......................................................................... 43
12 TECHNICAL CHARACTERISTICS .................................................. 44
13 SAFETY INSTRUCTIONS ............................................................... 45
13.1 Certificate of conformity TR CU (EAC marking) ..................... 45
14 DIMENSIONS ............................................................................... 46
15 TROUBLESHOOTING ................................................................... 48
ANNEX A Sound propagation velocity in some liquids ............................. 49
ANNEX B Sound propagation velocity in some solids .............................. 50
ANNEX C Flow rate table ...................................................................... 51
6
1 INTRODUCTION
The CU100 flowmeter is an electronic device that is based on ultrasonic signal transmission
through a pipe where a liquid is flowing. The working principle is called transit time. It
consists of placing two ultrasound transducers on a pipe and sending an ultrasonic signal
from the first to the second and back. The difference between the transmission and the
reception time is proportional to the flow velocity in the pipe. An associated electronic circuit
based on digital signal processing is responsible for converting the time difference in flow.
The device provides the following features:
• Non-invasive installation. The transducers are placed on the outside of the pipe
to measure the flow.
• Current output proportional to the flow rate and user programmable.
• Relay outputs programmable by the user.
• Graphic display with intuitive menus.
• No maintenance required.
2 INSTALLATION OF THE ELECTRONIC CONVERTER
It is recommended to install the electronic converter on a wall near the point where the flow
rate needs to be measured, never on pipes .
To do this, remove the lid and use the 5 mm diameter holes indicated in the figure to fix the
converter to the wall.
7
2.1 Electrical connection
For the electrical connection, the CU100 converter has four terminal strips. To help in the
wiring of the equipment, the description of the terminals is marked on the printed circuit next
to each terminal strip.
For the electrical installation it is recommended to use multiple conductor cables with
individual cable sections in the order of 0.25 to 0.5 mm2in order to make it easier to
connect. It is better to maintain the cables with mains voltage (power supply) separated from
the cables with low level signals (4-20 mA, etc.).
Before starting the installation, check that the cable glands are the right size for the cables to
be used. This will guarantee the instrument will stay watertight. The cable glands used are
for cables with outside diameters between 3.5 mm and 10 mm (see page 46 for more
details).
To connect the cables, peel the outside insulation to free the inner cables. It is
recommended to tin the ends of the wires to avoid loose ends. Pass the cables through the
cable glands and screw down in the corresponding positions of the terminal strip. Once the
wiring is finished make sure that the cables are well gripped by the cable glands to maintain
the degree of protection.
Incorrect installation of the cable gland or inadequate cable placement can cause irreparable
damage to the converter.
IMPORTANT NOTE: In order to comply with the electrical safety requirements as per EN-
61010-1 (IEC 1010-1), the installation of the equipment must take into account the following:
• A mains switch must be provided to disconnect the equipment. This switch must
be marked as the disconnecting device for the equipment and be within easy reach
of the operator.
• The mains supply must have an earth line.
• The housing must not be opened when the instrument has mains supply
connected.
IMPORTANT NOTE: To ensure smooth operation of the equipment, it is recommended to
make the connection paying attention to the following points:
• Do not change or modify the junction cable between the transducers and the
converter.
• It is recommended to pass the transducer cables through a metallic conduit. The
two cables can go through the same conduit, but never together with other cables.
• For the output signals, use shielded cable when possible.
• Keep the cables away from strong sources of noise.
8
2.1.1 Power supply wiring
Before starting the installation of the instrument, check that the supply voltage available is
the same as marked on the label of the converter.
Terminal Description Relay
C1 Common Relay 1
NC1 Normally Closed Relay 1
NO1 Normally Open Relay 1
C2 Common Relay 2
NC2 Normally Closed Relay 2
NO2 Normally Open Relay 2
Terminal Power supply
Earth
NNeutral
LPhase
It is important to connect the mains earth due to the presence of a mains filter inside that
requires this connection.
2.1.2 Relay output wiring
9
The relay outputs are SPDT relays with potential free contacts (see characteristics in page
44).
The state of the relay contacts corresponds to the relay at rest.
The relay contacts are not protected in any way, and therefore the protections must be
installed externally as required in the application, taking into account the limitations of the
characteristics of such contacts. In the case of having inductive loads, and to extend the
working life of the contacts of the relays, it is recommended to use overvoltage protection
(VDR for AC and diodes for DC loads). In all cases a fuse or some type of short circuit
protection against short circuits should always be provided according to the needs of the
intended load.
2.1.3 Analog output wiring
Terminal
+mA (positive)
-mA (negative)
Passive mode: pins 2&3
Active mode: pins 1&2
10
The mA output is galvanically isolated. It can be active (which means that the receiver device
connected to it should have a passive input) or passive (which means that the receiver device
must provide the power supply for the current loop). It is recommended to use a receptor with
an input resistance of less than 700 Ω to guarantee correct operation.
To configure the analog output type (active or passive) there are two jumpers placed just
behind the terminal strip. For the passive mode the jumpers must be situated between pins
2 and 3 and for active mode the jumpers must be between pins 1 and 2.
NOTE: The analog output has protection against reversed polarity. Due to another
protection against over voltages, if a reversed supply voltage greater than 32 V is applied to
the loop, the equipment may be damaged.
2.1.4 Transducers wiring
Terminal
TR1 + Live (positive)
TR1 -Shield (negative)
TR2 + Live (positive)
TR2 -Shield (negative)
The transducers are identified as TR1 and TR2. Be sure to connect the cable TR1 in the TR1
terminals in the circuit board and the cable TR2 in the TR2 terminals. The exchange of the
transducers can result in a loss of precision of the values measured by the instrument.
Transducer cables are supplied with plastic indicators 1 and 2 to be connected to the
transducers TR1 and TR2 respectively.
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1
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