Tecfluid LU9X2 Instructions manual

Instructions manual

Series LU

Ultrasonic level transmitter LU9X2

The art of measuring

R-MI-LU9X2 Rev.: 1 english version

PREFACE

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.

WARNINGS

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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.

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TABLE OF CONTENTS

2 WORKING 6

3.1 Unpacking .......................................................................... 6

4.1 Measuring range ................................................................. 7

Obstacles 8

9

4.5 Standpipe measurement ....................................................... 9

4.6 Temperature ...................................................................... 9

5.1 Power supply and analog output wiring ................................ 10

5.2 Alarm outputs wiring ............................................................ 11

6 OPERATION ................................................................................. 12 display 12 display 12

7.1 Access codes to the menus ................................................ 14

8.1 Tank .............................................................................. 16

8.1.1 Bottom distance ..................................................... 17

8.1.2 Top distance ......................................................... 17

8.2.1

8.2.2

Dead zone current ..................................................

Dead zone length ...................................................

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19

Operating 20

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9 PROGRAMMING PARAMETERS ..................................................... 20

Measuring 21

9.2 Decimals ............................................................................ 21

9.3.1 Filter time .............................................................. 22

9.3.2 Hysteresis ............................................................. 22

9.3.3 Interference time ..................................................... 22

9.4.1 Analog output ......................................................... 23

9.4.1.1 Programming output 4-20 mA ..................

9.4.1.2 Current calibration for 4 and 20 mA ..........

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24

9.4.2.1 Level ....................................................... 24

9.4.2.2

9.4.2.3

9.4.2.4

Default 26

10 SERIAL NUMBER .......................................................................... 27

12 CONTRAST ............................................................................... 28

13 OPERATION SCREEN ................................................................... 28

13.1 Indication of echo in dead zone ........................................... 29

13.2 Indication of absence of echoes ........................................... 29

14 ASSOCIATED SOFTWARE WINSMETER LU ................................... 30

14.1 USB cable connection and software installation ................... 30

Port 31

14.3 Password ........................................................................... 32

14.4 Access to “Installation” ....................................................... 35

14.4.1 Limits ....................................................................

14.4.2 Mode ....................................................................

14.4.3 Dead zone .............................................................

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14.5 Acces to “Programming” ..................................................... 36

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14.5.1 Level ..................................................................... 36

14.5.3 Current loop .......................................................... 37

14.5.4 Alarm outputs ......................................................... 37 loop 37

14.6 37

14.8 Firmware updates ............................................................... 39

14.9 Configuration file ................................................................ 40

15 TECHNICAL CHARACTERISTICS .................................................. 41

16.1 Certificate of conformity TR CU (EAC marking) ..................... 42

5

1 INTRODUCTION

The series LU level transmitters are electronic equipment based on the transmission of ultrasonic waves to measure the distance to a liquid or solid in a vessel.

The microprocessed electronic circuit offers the following features:

• Emission and reception circuits for the ultrasonic signals, and microprocessor treatment.

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Alarm outputs with programmable hysteresis level.

Programmable current output proportional to the distance or level.

Quick current range programming by means of internal keys.

Keyboard and 128x64 pixel graphic display module (optional).

2 WORKING PRINCIPLE

An emitting circuit sends an electrical signal to a transducer that converts it into an ultrasonic signal that propagates through the medium until it bounces off the surface of a liquid or solid.

The echo signal travels back until it reaches the transducer again and is converted into an electrical signal.

By multiplying the time it takes for the signal to propagate by the speed of sound in the medium, the travelled distance is obtained.

Distance = v sound

(t

1

+t

2

) / 2

3 RECEPTION

The LU level transmitters are supplied conveniently packaged for their protection during transportation and storage, together with their instructions manual for installation and operation.

All the instruments are supplied tested in our facilities.

3.1 Unpacking

Unpack the instrument carefully, removing any remains of the packing .

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Sensors of : PVDF -20ºC ...... +60ºC

PP -5ºC ...... +50ºC

4 INSTALLATION

To make the instrument work in the best conditions, it is important that the bottom face of the sensor is installed parallel to the surface of the product to be measured. In the case of liquids, the face of the transducer should be horizontal.

It is important to avoid installing the instrument at the center of the vessel. In some cases unwanted echoes that affect the measurement may appear. The installation at the center is only advantageous in vessels with tapered bottom, since distances can be measured to the bottom.

The LU transmitters should be installed at a minimum distance of the walls of the vessel of about 200 mm, so that they could not give unwanted reflections.

The socket where the instrument is installed should be such that the bottom of the instrument exceeds at least 10 mm below it, as shown in the following figure.

Screw the instrument in the socket with an appropriate key, always by the flat sides for this purpose. The maximum torque is 25 Nm.

Never use the electronics housing for threading the device to the vessel.

Excessive tightening can damage the transducer irreparably.

The minimum distance that the instrument can measure is called dead zone. If the product gets closer than that distance, the level transmitter indicates an alarm by means of the current loop, that will be 3.6 mA or 22 mA depending on the programming (see point 8.2.1 on page 18). If the instrument has a display it will show the message “Dead zone”.

Never work within the dead zone. In certain circumstances, false level readings may occur.

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Model

LU912

LU932

Dead zone

0.35 m

0.55 m

Max. distance (liquids)

5 m

10 m

Max. distance (solids)

2.5 m

5 m

In cases where it is necessary to measure distances shorter than the dead zone, a reflector can be installed as shown in the figure.

4.2

The measured distance will be the addition of the real distance plus the distance between the transducer and the reflector.

It should be avoided that the product reaches the instrument, since accumulations might form on the transducer, and that would affect the measurement.

Obstacles in the vessel

The transmitter must be installed so that the ultrasonic beam cannot find anything on its path, as this could lead to unwanted echoes and incorrect measures.

In some cases, inclined reflectors can be placed in front of an obstacle, so that the beam in this region is diverted and the reflected signal does not return to the instrument.

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It is not recommended to install the level transmitter in the upper zone of a filling entry, because the instrument could detect the level of the jet filling instead of the level of the stored product.

4.4 Foams

Some liquids generate foams when in movement. In vessels with agitators, or in the filling processes, important layers can be generated that weaken the reflected signal which is essential for measuring the level.

In a lot of cases the problem of the foam and wave turbulences can be solved by putting a standpipe.

It can be appropriated in cases of waves or foam. It is based on placing a tube in the tank so that the instrument measures the level inside the tube.

The length of the tube depends on the distance that you want to measure, or the minimum level desired.

The diameter of the tube should be bigger than the threaded connection size of the instrument (> 2 inches or 50 mm for the LU912 and > 2 1/2" or 65 mm for the LU932).

The standpipe should incorporate a drill top vent grilled hole with a diameter between 5 and

10 mm.

If the standpipe is composed of several sections, it is necessary that the inner wall is free from defects (welding, edges, etc.) that could be interpreted as a false measurement. In the same way, if the product is susceptible to leaving adherences or inlaid inside the tube, these can lead to false readings.

4.6 Temperature

In outdoor installations, the measurement margins can be reduced due to environmental conditions such as rain or wind, since the ultrasonic signal that travels through the air can be affected.

It is also recommended to install a protection to avoid direct sunlight on the level transmitter.

The maximum working temperatures are indicated on page 41.

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5.1

For the electrical connection, the LU level transmitter is provided of terminal strips. To help in the wiring of the equipment, the description of the terminals is marked 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 mm 2 in order to make it easier to connect.

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 M16 x 1.5 cable glands used are for cables with outer diameters between 5 mm and 12 mm.

To connect the cables, peel the outer insulation to free the inner cables. Then pass the cables through the cable glands and screw down in the corresponding positions of the terminal strip as indicated in the following point.

Grip carefully the cables with the cable glands to maintain the ingress protection.

Incorrect installation of the cable gland or inadequate cable placement can cause unrepairable damage to the converter.

Power supply and analog output wiring

Before starting the installation of the equipment, check that the supply voltage available is the same as marked on the label of the level transmitter.

Models LU912 and LU932 are two-wire instruments, that is, the equipment is powered through the current loop.

The positive terminal of the power supply is connected to the position + and the positive terminal of the load to the position -. The negative terminals of the power supply and the load are connected together.

Since it is a 2-wire instrument, the supply and signal line is the same. It is recommended to use a twisted pair wiring or shielded cable to avoid interferences in the current loop.

It is recommended to use a load with a resistance lower than 700 Ω to guarantee a good performance.

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5.2

NOTE: The analog output has protection against reversed polarity. Due to another protection against overvoltages, if a loop supply voltage with inverted polarity and higher than 32 V is connected, the equipment may be damaged.

Alarm outputs wiring

Terminal

S1 Source output 1

D1

S2

D2

Drain output 1

Source output 2

Drain output 2

The alarm outputs are connected in the positions D and S of the terminal block.

Outputs are N-channel MOSFET transistor isolated from the rest of the circuit and potential free.

Example of the connection of the alarm output to a PLC

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6 OPERATION

The instrument allows programming the current loop limits by means of the 4 mA and 20 mA keys. To do this, the top cover must be remove, previously releasing the DIN913 M3 x 8 safety screw.

The procedure is the following:

Point the equipment to a flat surface and place it at the distance corresponding to 4 mA.

Press the 4 mA button until the led blinks (about 4 seconds).

Then place the equipment at the distance corresponding to 20 mA. Press the 20 mA button until the LED blinks (about 4 seconds).

From this moment, the level transmitter will transmit the current proportional to the distance between the two programmed values.

The instrument is delivered generally calibrated and programmed to indicate a distance. To change any configuration parameter, the keyboard can be accessed by removing the top cover.

LU level transmitters have a graphic display and 4 keys.

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In the following figure the operation of each key is described.

(Down / Left) To change between operating screens.

To decrease a digit or to move to the left digit.

Inside the menus, to shift into the below element.

(Up) To change between display screens.

To increase a digit.

Inside the menus, to shift into the upwards element.

(Enter) To validate a data.

To enter the different menus of the device.

To exit an informational text.

(Escape) To go back to the previous menu. To exit a screen without validating a data.

NOTE: The function of the key (Down / Left) that changes to the left digit is done by pressing the key for more than one second.

To access the main menu of the converter, press the key (Enter). The following screen appears:

The "Installation" option allows to configure the instrument, in order to obtain a correct indication. It is explained in Chapter 8 of this manual.

The "Programming" option allows to program all parameters of the converter, as explained in

Chapter 9 of this manual.

The “Language” option selects the language in which all the menus will be displayed.

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7.1

The options "Serial Number" and "Firmware Version" are informative and are discussed in

Chapters 10 and 11 of this manual.

Finally, the option "Contrast" allows to adjust the contrast of the information on the screen, to adapt it to the ambient light of each installation.

Access codes to the menus

It is possible to program a different password for the “Installation” menu and for the

“Programming” menu.

By default, the equipment is factory configured with the passwords disabled.

To change any of these passwords, it is necessary to enter the corresponding menu and once inside, access the submenu "Password".

To change the access password of the installation menu, select

"Installation" on the main menu and then "Password".

To change the access password of the programming menu, select

"Programming" in the main menu and then "Password".

When the "Password" option is selected, a screen that indicates the password status for this menu appears.

Selecting “enable”, the screen to enter the new password appears .

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Once entered, the new password is asked again to avoid possible inadvertent error.

If the re-entered password does not match the first one, the following error message appears and the process should be carried out again.

If both passwords match, the following information message is displayed.

If the password needs to be changed or disabled, the procedure is the same. Once entered the "Password" menu, the following screen appears:

If “Change” is selected, the equipment will ask for a password again. If “Disable” is selected, the following message will appear:

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Power on the electronic converter with the voltage indicated on the label.

Press the (Enter) key in order to enter the main menu.

With the keys (Down / Left) and (Up), select “Installation”, and then validate with the key

(Enter).

If the instrument has a password enabled, it must be entered to access the menu. For more details about the password, see point 7.1 on page 14.

Once in the “Installation” menu, the first screen allows to choose between the different options.

8.1 Tank

First, a screen appears where the bottom and top distances can be selected. These distances allow the instrument to indicate measurements in level mode or percentage mode

(see point 9.5 on page 26).

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The bottom distance is the distance between the transducer face and the bottom of the vessel. It allows to calculate el level with respect to that point. This parameter is necessary to visualize data in level mode or percentage mode, because the instrument takes this distance as a reference (see point 9.5 on page 26).

The following figure shows the bottom distance. In case of non flat bottom vessels, the bottom distance should be taken between the end of the instrument, and the desired point of zero level.

Bottom

Distance

This distance is necessary to visualize data in percentage mode (see point 9.5 on page 26).

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The percentage of filling is calculated given the bottom distance and the top distance (see points 8.1.1 and 8.1.2 on page 17) , according to the following equation: di: bottom distance ds: top distance

When the distance between the product and the sensor is “di”, the visualized percentage is

0%.

Top

Distance

Bottom

Distance

%

When the distance between the product and the sensor is “ds”, the visualized percentage is

100%.

In this screen the dead zone current and the dead zone length can be chosen.

8.2.1 Dead zone current

When the distance between the instrument and the product surface is shorter than the minimum measuring distance, that is, when the product is in the dead zone (see section 4.1 on page 7), the instrument can transmit an alarm by means of a value of current out of range. This value can be either 3.6 mA or 22 mA.

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When programming this value, the no echo alarm is automatically programmed with the opposite value.

8.2.2 Dead zone length

In some installations it may be convenient to increase the dead zone value. For example, in cases of vertical tube measurement.

In this screen the dead zone distance in m can be programmed.

8.3 Diagnosis

It allows to check some parameters of the instrument quickly.

Pressing the key (Enter) when Alarm 1 or Alarm 2 are selected, this output will be activated or deactivated. When the output is activated, the text is shown as inverse.

Pressing the key (Enter) over 4 mA, the analog output alternates between 4, 8, 12, 16 and

20 mA, which allows to check the analog output adjustment.

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8.4

In all cases the echo intensity is displayed by means of a value between 0 and 100. This intensity depends on the distance to the target, the type of product where the wave is reflected and the conditions of installation.

If the distance of the product at the time of verification is longer than half the maximum measuring distance, it is normal that the intensity has a low value.

In the event that the distance is shorter, if the value of the intensity is low, it may be due to two reasons: a) That the product has a high absorption coefficient. This means that an important part of the wave is absorbed by the product and is not reflected to the instrument. In this case, the maximum measuring distance will be shorter than specified in the characteristics of the instrument. b) That the instrument has not been installed correctly. As the face of the transducer is no longer parallel to the surface of the product, part of the reflected signal does not return to the instrument, thus decreasing the intensity of the echo.

Operating mode

Distance or level can be selected. The reference point to calculate the level is the one programmed as bottom distance (see point 8.1.1 on page 17).

The instrument will always be working in this mode even if there is a power fail.

Parameters related to the analog output and alarm outputs will be programmed in the chosen mode.

By the programming parameters the visualization and the outputs of the instrument can be configured.

Turn on the converter and press (Enter) to enter the main menu. The following screen appears:

With the keys (Down / Left) and (Up), select “Programming”, and then validate with the key

(Enter).

If the instrument has an enabled password, it must be entered to access the menu. For more details about the password, see point 7.1 on page 14.

Once in the “Programming” menu, the first screen allows to choose between the different options.

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The instrument can indicate the measured distance or level in meters or feet.

9.2 Decimals

In this screen the desired number of decimals for the measured value is chosen.

For the selection of the number of decimals it must be taken into account that an indication with an excess of decimals may give the sensation of instability of the reading.

9.3 Filter

The level transmitter has a filter (damping) to provide stable level and analog output readings.

The configuration of this filter can be very useful in the cases where the readings have some instability (due to waves, foams, solids, etc.).

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By selecting a filter with a shorter or longer integration time, response to level variation will be obtained in more or less time.

The filter time is selected in seconds, with a minimum value of 1 and a maximum value of 25 seconds. For example, with an integration time of 15 seconds, the display will indicate the average level over the last 15 seconds. This does not mean that the display is refreshing its data every 15 seconds. The display shows a new value several times per second, indicating an average of the level values of the last 15 seconds.

9.3.2 Hysteresis

When there is a sudden variation of the level then the filter should react as fast as possible to give a correct reading of the new value.

On this screen the level variation in m necessary to reset the filter can be programmed.

The filter controls for each reading the deviation of the instant level with respect to the average level. If this deviation exceeds the programmed value, the filter will reset, indicating the instant value, and will start again the filtering process.

For example, consider an instrument measuring an average level of 2.4 m and the programmed hysteresis is 0.04 m.

The filter will continue to give average readings while the instant measured level is within 2.36 and 2.44 m.

Sometimes objects that interfere the path of the ultrasonic wave can cause wrong readings.

An example is the case where the blades of an agitator can generate unwanted reflected signals.

To avoid these readings, on this screen, the number of seconds that an unwanted object should remain so that the instrument interprets it as correct can be programmed.

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For example, if the time is set to 5 seconds, an object that interferes the ultrasonic wave path must remain 5 seconds so that the level transmitter takes this object into account.

9.4 Outputs

In this screen, one of the three outputs to be programmed can be selected: Analog (4-20 mA), Alarm 1 and Alarm 2

The level (or distance) corresponding to 4 mA and 20 mA can be programmed and the calibration for these two values can be made as well.

9.4.1.1 Programming output 4-20 mA

Level (or distance) limits equivalent to each current are entered.

The programmed value for 20 mA can be higher than the programmed for 4 mA or vice versa.

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9.4.1.2 Current calibration for 4 and 20 mA

The LU9X2 is delivered with the current output already calibrated. If you want to correct a derive of the 4 or 20 mA current values because they do not coincide with the ammeter used, it can be done by entering the ammeter value and pressing the key (Enter). The ammeter will indicate the new value and the screen will show the values of 4 or 20 mA again in the event the operation needs to be done again. More than one adjustment can be necessary to do a complete calibration.

Before making a current calibration, be sure that the ammeter used for that is showing a correct value.

When selecting one of the two outputs, the options available for each one appear.

9.4.2.1 Level

In these screens the level (or distance) values at which the alarms will change its status and the level of hysteresis are selected. By level of hysteresis we understand the difference between activation and deactivation of the output. Sometimes the level of a vessel is not stable due to waves generated by agitators, etc. To avoid that an alarm output is continuously moving from activate to deactivate status, we must program the points of connection and disconnection.

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Example 1

Suppose we work in level mode. If the output is programmed to activate at 1 m and to deactivate at 0.9 m, when the level is zero the output will be deactivated. When the level reaches a value of 1 m the output will be activated and it will not return to deactivated state until the level falls below 0.9 m.

Activate

1 m

Deactivate

0.9 m

Example 2

If the output is programmed to deactivate at 1 m and to activate at 0.9 m, when the level is zero the output will be activated. When the level reaches a value of 1 m the output will be deactivated and it will not return to activated state until the level falls below 0.9 m.

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Deactivate

1 m

Activate

0.9 m

9.4.2.2 Dead zone

The alarm will activate when the instrument detects dead zone. It is available for Alarm 1.

9.4.2.3 No echo

The alarm will activate when the instrument does not detect any echo. It is available for

Alarm 2.

9.4.2.4 Disabled

The alarm is always deactivated.

The converter presents the selected screen when a power failure occurs or when returning from “Installation” or “Programming” menus.

Three screens can be programmed:

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Distance. In this case the screen shows the distance between the sensor and the surface where the ultrasonic wave is reflected.

Level. In this case the screen shows the level or height from a reference, normally the bottom of the tank, to the liquid or solid surface.

To display correctly the level, the parameter “Bottom distance” should be previously programmed (see point 8.1.1 on page 17).

Level %. Displays the percentage of filling.

To display correctly the level in percentage, the parameters “Bottom distance” and “Top distance” should be previously programmed (see point 8.1.1 and 8.1.2 on page 17).

In this section the transmitter serial number is shown.

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11 FIRMWARE

From the main menu, if “Firmware version” is selected, the screen will show this data and the corresponding date.

12 CONTRAST

By means of this option, the screen contrast can be adjusted.

When exiting the menu, the display shows the operation screen. To scroll between the three operating screens, simply press the key (Up). The three possible screens are distance, level and percentage (see point 9.5 on page 26).

The screens also indicate the alarm output status, if they are enabled (see point 9.4.2 on page 24).

If Alarm 1 is enabled, an “A1” is shown, and if Alarm 2 is also enabled, an “A2” is shown.

Depending on the state of the alarms, deactivated or activated, the text format will appear in normal or inverse.

Alarm 1 enabled and deactivated

Alarm 2 disabled

Alarm 1 disabled

Alarm 2 disabled

Alarm 1 enabled and activated

Alarm 2 enabled and activated

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13.1 indication of echo in dead zone

In the case that the distance is shorter than the minimum measuring distance, that is, when the product is within the dead zone (see point 4.1 on page 7), the transmitter cannot measure a correct value.

In this situation the instrument replaces the display value with the text "Dead Zone". The analog signal passes as programmed at 3.6 mA or at 22 mA (see point 8.2.1 on page 18), indicating incorrect measurement due to exceeding the minimum distance.

If, in addition, alarm 1 is programmed for dead zone detection, it will be shown as activated in the display.

13.2 Indication of absence of echoes

If the distance is longer than the maximum measuring distance, the transmitter does not receive the reflected signal. In the same way, if the product is not suitable for ultrasonic measurement, it may be the case that there is no signal received.

In this situation the instrument replaces the display value with the text "No echo". The analog signal passes as programmed at 3.6 mA or at 22 mA (see point 8.2.1 on page 18), indicating incorrect measurement due to echo absence.

If, in addition, alarm 2 is programmed for echo absence indication, it will be shown as activated in the display.

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14 ASSOCIATED SOFTWARE WINSMETER LU

By means of this associated software, calibration and adjustment of the instrument can be done in a comfortable and intuitive way.

Such software can be downloaded from the “Downloads” section of the Tecfluid S.A. www.tecfluid.com/downloads

14.1 USB cable connection and software installation

Extract the files from the Winsmeter LU.zip to a new system folder.

Execute the Setup.exe file and follow the steps for the installation.

In order to connect the converter to a computer an USB cable is required. This cable is type A at one end and mini USB type B at the other, and it is readily available on the market.

The ends of the cables can be seen in the picture.

The USB connector is located at the opposite side of the cable glands.

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Connect the USB cable at one end to the converter and at the other to the computer where the software is installed.

Power on the electronic converter.

Execute the program WinsmeterLU following the sequence Start – Programs – Tecfluid S.A. -

WinsmeterLU.

14.2 Port connection

In the "Port" section, choose the appropriate port for the converter. This will appear with the name of the port followed by LU9X2 and its serial number. Then click "Open".

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Once the port is open, the button "Lock" is activated.

14.3 Password

The LU9X2 level transmitter can be locked so that programming data can be modified only with previous password access.

When the converter is locked, data can be read but not modified.

By default the device is unlocked. All data can be modified by means of the program

Winsmeter LU.

To set a password access to a section (“Installation” or “Programming”), the section must be unlocked. To do this, simply press the “Lock” button in the desired section.

Each section can be locked or unlocked independently. Passwords are equally independent for each section.

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Once the “Lock” button is pressed, the following window will appear:

In the “Password” textbox a 4 numeric digit code should be entered, and in the “Confirm” textbox, the code is confirmed to avoid unintentional errors.

Once the password is confirmed, press the “Lock” button and the section (“Installation” or

“Programming”) will be locked.

The text “Device locked” will appear, and the program returns to the home screen.

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After accessing back to the port and pressing the “Open” button, the screen shows the textbox to enter or change the locked passwords.

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To unlock the section it is necessary to write the correct password and press “Enter” or the

“Open” button. The text “Installation enabled” or “Programming enabled” will appear at the bottom of the section

Once a section is enabled, pressing the corresponding button “Unlock”, the section will be unlocked.

14.4 Access to “Installation”

To enter to “Installation” window, press the corresponding tab.

Changing the parameters of this window, the functions of the equipment that affect the measurement can be programmed. Once the changes have been made, press the "Send" button to save all data into the device memory.

Note: The installation parameters are always programmed as real distances and their units are meters.

14.4.1 Limits

In this section the values corresponding to the top and bottom distance of the tank can be configured (see points 8.1.1 and 8.1.2 on page 17).

14.4.2 Mode

In the Mode section one of the two operating modes can be chosen, distance or level (see point 8.4 on page 20).

14.4.3 Dead zone

The dead zone current and the echo absence current are programmed (see point 8.2.1 on page 18), as well as the length of the dead zone (see point 8.2.2 on page 19).

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To transfer the data to the instrument, press the “Send” button. The message "Saving program" will appear in the level transmitter for two seconds. The installation data will be saved in the internal memory.

14.5 Access to “Programming”

To enter the “Programming” window, simply press the corresponding tab.

Changing the parameters in this screen, the different functions of the equipment can be programmed. Once the changes are made, press the “Send” button to save all data into the device memory.

14.5.1 Level

It allows to change the Units of measure. Programming parameters that have distance or level units will update their value when those units are changed.

The Default screen can be chosen. The instrument will save this screen in memory and it will be loaded when it is powered.

Finally, the number of Decimals to display the measured value on the screen can be selected.

14.5.2 Filter

In this box the value in seconds of the Filter can be programmed. This filter allows to obtain stable current readings despite of fluctuations of the level (see point 9.3.1 on page 22).

The value of Hysteresis is that which indicates when the filter should stop working (see point

9.3.2 on page 22).

In the Interferences section, the time necessary for a sudden change of level to be accepted as valid can be programmed (see point 9.3.3 on page 22).

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14.5.3 Current loop

In this section the Distance or level values for 4 mA and 20 mA can be configured. These values correspond to the current range limits. Therefore, the current loop will give a linear signal between 4 mA and 20 mA when the input signal has a value between the programmed values in these textboxes.

14.5.4 Alarm outputs

In the Alarms textbox, the functionality of the two alarm outputs can be selected.

These functions can be level alarm, dead zone, no echo or deactivated (see point 9.4.2 on page 24).

14.5.5 Current loop calibration

The LU level transmitter is delivered with the current output already calibrated. If you want to correct a derive of the 4 or 20 mA current values because they do not coincide with the ammeter used, it can be done in the following way:

To calibrate the 4 mA point, press the button “4 mA”. The transmitter will fix the output to this value. Then enter the current value indicated in the multimeter and press the button

“Prog. 4 mA”. The transmitter will adjust its output and the multimeter will show 4 mA.

Follow the same steps for the 20 mA point.

Finally, press the “mA ON” button. The current loop will be calibrated.

Before making a current calibration, be sure that the ammeter used for that is showing the real measure.

14.6 Visualization

When the communication with the computer port is established (see section 14.2), the tab

"Visualization" opens. This tab lets you view real-time the distance, level and percentage values, as well as the current value of the analog output and the status of the digital outputs if they are enabled.

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It is an intuitive tool to verify that the instrument has been installed and programmed correctly.

14.7 Datalogger

In this window the progress of the different variables of the equipment can be registered in a file.

The time between samples, as well as the start and end time of the registry can be selected.

When the "Register" button is pressed, the screen that allows to name the file and select its location appears.

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The created file has CSV format, which can be viewed directly with a spreadsheet.

New firmware updates can be published in the website. These updates contain improvements or bug fixes that make that the equipment operates at best conditions.

The updates can be downloaded from the following link at Tecfluid S.A. website: www.tecfluid.com\downloads

To update the device, go to menu “Firmware” - “Update”, and a screen with the button “File” will appear. Pressing this button the file explorer can be accessed. The downloaded file has to be searched there.

Once the file is selected, press the “Program” button. A message “Programming device” will appear.

Progress bar will indicate the process, after which the message “Device programmed” will appear.

From this moment, the instrument already has the new version of Firmware.

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A device configuration backup can be made by saving data into a file. To do this, go to menu

“File” - “Save file”.

The file is saved in the same folder where the Winsmeter LU software is located.

In the same way, a configuration data file can be loaded into the device. To do this, go to the menu “File” - “Load file”, and the file explorer will appear. The file has to be searched there.

The filename is the serial number and the extension is INI.

NOTE: When the configuration is saved into a file, the stored data are those in the device memory. These data may be different from those shown on the Winsmeter program. To ensure that the data match press the "Send" button in the "Programming" tab.

IMPORTANT: The USB connection is used only for the configuration and commissioning of the device. In no case it is intended to be used continuously, as a normal mode of operation in an industrial environment.

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15 TECHNICAL CHARACTERISTICS

Materials

Sensor: PP, PVDF

Housing body: Coated aluminium

Without display: Coated aluminium

With display: Transparent polycarbonate UV resistant

LU912: Thread G2 (BSP),

LU932: Thread G2 ½ (BSP). range

LU912: 0,35 m … 5 m (solids up to 2.5 m)

LU932: 0,55 m … 10 m (solids up to 5 m)

12 ... 36 VDC, 2-wire system

Consumption: Maximum 22 mA

Analog output

4-20 mA or 20-4 mA

Measuring error signals: 3,6 mA and 22 mA

2, MOSFET transistor N channel potential free. I max

: 200 mA

Number of digits: 1 integer and 3 configurable decimals

Digit size: 9 mm

Ingress protection: IP66/IP67

Ambient temperature range:

With aluminium cover: -40ºC ... +70ºC

With plastic cover: -40ºC … +60ºC

Maximum working pressure: 300 kPa (3 bar)

Resolution: 1 mm

Uncertainty: < 0,25% of measuring range

Repeatability: < 0,25% of measuring range

LU level transmitters are in conformity with all essential requirements of all EC directives applicable to them:

2012/19/EU Waste electric and electronic equipment (WEEE). substances in electrical and electronic equipment

(ROHS).

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The declarations UE of conformity can be downloaded from the section “Download” of the

Tecfluid S.A. website. www.tecfluid.com

16.1 Certificate of conformity TR CU (EAC marking)

Tecfluid S.A. have subjected the series LU of level transmitters to a certification procedure according to the technical regulations of the

Customs Union of the Eurasian Economic Union (EEU).

This Certificate is an official document confirming the quality of production with the standards on the territory of the Customs Union, particularly regarding safety requirements and electromagnetic compatibility.

17 TROUBLESHOOTING

Problem Probable cause Solution

The display indicates

“dead zone”

The product is in “dead zone”. The distance between the level transmitter and the product is too short.

There is an obstacle placed in the dead zone of the instrument.

The ultrasonic wave reflected from the surface is very weak because the product has a very low index of reflection toward the sensor.

It can happen with foams, sands, solids.

The display indicates “no echo”

Bad installation of the equipment.

Separate the level transmitter from the product whose level you need to measure. (see page 7).

Separate the level transmitter from the obstacle (see page 8).

Verify that the level transmitter is the adequate for this application.

Verify that the bottom face of the level transmitter is installed parallel to the surface of the product (see page 7).

Display is off

Measured values are not stable

The sensor is not working within its measuring range

Verify that the level transmitter is the adequate for this application.

Power supply is not adequate.

Power supply is not adequate.

There may be some objects between the sensor and the product.

There are waves on the liquid surface.

Verify the polarity of the cables of the power supply, check that they are well connected to the terminal block and there is voltage between them.

Verify the polarity of the cables of the power supply, check that they are well connected to the terminal block and there is voltage between them.

Change the position of the level transmitter so that the object is not an obstacle.

Increase the duration of the filter

(damping) (see page 22).

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18 DIMENSIONS

LU912

LU932

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WARRANTY

Tecfluid S.A. guarantee all the products for a period of 24 months from their sale, against all faulty materials, manufacturing or performance. This warranty does not cover failures which might be imputed to misuse, use in an application different to that specified in the order, the result of service or modification carried out by personnel not authorized by Tecfluid S.A., wrong handling or accident.

This warranty is limited to cover the replacement or repair of the defective parts which have not damaged due to misuse, being excluded all responsibility due to any other damage or the effects of wear caused by the normal use of the devices.

Any consignment of devices for repair must observe a procedure which can be consulted in the website www.tecfluid.com, “After-Sales” section.

All materials sent to our factory must be correctly packaged, clean and completely exempt of any liquid, grease or toxic substances.

The devices sent for repair must enclose the corresponding form, which can be filled in via website from the same “After-Sales” section.

Warranty for repaired or replaced components applies 6 months from repair or replacement date.

Anyway, the warranty period will last at least until the initial supply warranty period is over.

TRANSPORTATION

All consignments from the Buyer to the Seller´s installations for their credit, repair or replacement must always be done at freight cost paid unless previous agreement.

The Seller will not accept any responsibility for possible damages caused on the devices during transportation.

Tecfluid S.A.

Narcís Monturiol 33

08960 Sant Just Desvern

Barcelona

Tel: +34 93 372 45 11

Fax: +34 93 473 44 49 tecfluid@tecfluid.com www.tecfluid.com

Quality Management System ISO 9001 certified by

Pressure Equipment Directive 2014/68/UE certified by

ATEX European Directive 2014/34/EU certified by

HART is a registered trademark of Fielcomm Group TM

The technical data described in this manual is subject to modification without notification if the technical innovations in the manufacturing processes so require.

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