Debitmetru Ultrasonic FLUXUS - ADM6725 PDF
Debitmetru Ultrasonic FLUXUS - ADM6725 PDF
Debitmetru Ultrasonic FLUXUS - ADM6725 PDF
UMADM6725V2-2EN
Phone : +33 3 88 59 01 50
Fax : +33 3 88 59 01 51
e-mail : info@fr.vega.com
www.vega.fr
User's manual UMADM6725V2-2EN for FLUXUS ADM 6725, firmware version V5.xx
All rights reserved
FLUXUS can be operated in the language of your choice. Please
refer to section 4.5.
UMADM6725V2-2EN, 03.04.2003 1
17 Concentration Measurement 99
17.1 Principle of Measurement 99
17.2 Enabling the Concentration
Measurement 99
17.3 Setting the Parameters 100
17.4 Measurement 101
17.5 Saving the Measured Concentration 101
18 Heat Flow Rate and Heat Quantity 103
18.1 Settings 103
18.2 Mounting and Connecting the Sensors 104
18.3 Measuring 105
18.4 Temperature Correction 106
18.5 Steam Option 107
19 Process Inputs 109
19.1 Linking the Temperature Inputs
to the Channels 109
19.2 Linking Other Inputs to the Channels 111
19.3 Activation of Process Inputs 111
19.4 Connection of a Current Source 112
20 Process Outputs 115
20.1 Installation of a Process Output 115
20.2 Defining the Error Value Delay 120
20.3 Circuits of the Process Outputs 120
20.4 Activation of an Analogue Output 121
20.5 Activation of a Pulse Output 122
20.6 Activation of an Alarm Output 122
20.7 Operation of the Alarm Outputs 125
20.8 Deactivating the Outputs 127
21 Troubleshooting 129
21.1 Problems with the Measurement 130
21.2 Correct Selection
of the Measuring Point 130
21.3 Maximal Acoustic Contact 131
21.4 Frequent Problems 131
21.5 Measurement Data Substantially Differ
from the Expected Value 132
21.6 Problem with the Totalizers 132
A Specifications 133
B Overview of the Firmware 137
C Reference 139
2 UMADM6725V2-2EN, 03.04.2003
1 Introduction
1 Introduction
1.1 Regarding this Manual
This manual has been written for the personnel operating a FLUXUS flowmeter. It contains very
important information about the instrument, how to handle it correctly, how to avoid damaging it and
how to avoid injury. Always keep this manual at hand. Get acquainted with the safety rules and the
handling precautions. Make sure you have read and understood this manual before using the
instrument. The basic functions of the instrument are explained in chapter 4.
All reasonable effort has been made to ensure the correctness of the content of this manual. Should
you however find some erroneous information, please inform us.
Please note that we shall be grateful for any suggestions and comments regarding the FLUXUS
concept and your experience working with the instrument. This will ensure that we can further develop
our products for the benefit of our customers and in the interest of technological progress.
Furthermore, should you have any suggestions about improving the documentation and particularly
this User's Manual, please let us know so that we can consider your comments for future reprints.
We also provide special customer solutions and will be pleased to advise you in using FLUXUS for
specific applications and finding the most appropriate solution for your measurement problem.
The content of this manual may be changed without prior notice. All rights reserved. No part of this
manual may be reproduced in any form without VEGA's written permission.
Note: The notes contain important information which help you use your instrument in an optimal
way.
Attention! This text gives you important instructions which should be respected in order to avoid to
damage or destroy the instrument. Proceed with attention!
This text denotes an action which could result in injury or death of personal. Proceed
cautiously!
1.3 Warranty
The FLUXUS flowmeter is guaranteed for the term and to the conditions specified in the sales contract
provided the equipment has been used for the purpose for which it has been designed and operated
according to the instructions given in the present User's Manual. Misuse of the FLUXUS will
immediately revoke any warranty given or implied. This includes:
• the replacement of a component of FLUXUS by a component that was not authorized by VEGA,
• unsuitable or insufficient maintenance,
• repair of FLUXUS by unauthorized personnel.
VEGA assumes no responsibility for injury to the customer or third persons proximately caused by the
material owing to defects in the product which were not predictable or for any indirect damages.
FLUXUS is a very reliable instrument. It is manufactured under strict quality control, using modern
production techniques. If installed correctly, in an appropriate location and as recommended, used
UMADM6725V2-2EN, 03.04.2003 3
1 Introduction
cautiously and taken care of conscientiously, no troubles should appear. If any problem appears which
cannot be solved with the help of this manual (see chapter 21), please contact our sales office, giving
a precise description of the problem. Don't forget to specify the model, serial number and firmware
version of your instrument.
4 UMADM6725V2-2EN, 03.04.2003
2 The Flowmeter
2 The Flowmeter
2.1 Overview
FLUXUS ADM 6725 is a flowmeter that uses ultrasonic signals to measure the flow in pipes or
conduits. It can measure the following quantities:
-the flow velocity,
-the volume and mass flow rate and their totalization,
-the heat flow rate and its totalization (optional),
-the sound velocity of a medium,
-the concentration of a constituent of a solution (optional).
With a special probe, FLUXUS ADM 6725 can also measure the thickness of pipe walls.
The transducers can be used at temperatures between -30°C and 130°C. With specially designed high
temperature transducers, the operating temperature range can be extended up to 200°C, and, for
short periods, up to 300°C. Measurement can be made on all commonly used pipe materials such as
steel, synthetic material, glass or copper. Pipe diameters may range from 10 up to 6500 millimeters
depending on the transducer type. The two clamp-on transducers allow for non-invasive measurement
that do not affect the pipework or the liquid to be measured. They are small, lightweight and also very
robust.
FLUXUS ADM 6725 is a portable, battery operated measuring instrument. It can also be operated
from an external power supply of 100 to 240 VAC using the supplied power adapter. FLUXUS ADM
6725 has protection degree IP54 and is therefore suitable for monitoring tasks under difficult
environmental conditions.
FLUXUS ADM 6725 can be operated in different languages. A backlit display shows input data and
measurements results as well as operational errors. The menus guide the user through the parameter
setup, measurement and data storage.
An internal data bank contains the properties of many current materials and media. It is possible to
select which of those materials and media will be offered in the selection lists of the program branches
and the order in which they will appear. An integrated coefficient storage which can be partitioned
according to your needs keeps self-defined properties of materials and media.
FLUXUS ADM 6725 can log up to 100,000 measured values and up to 14 different sets of site
parameters. Furthermore, up to 80 memory places for measuring point parameters can be used.
FLUXUS ADM 6725 has a serial interface which allows the transfer of the measured data to a PC or
to a printer for visualization, edition and management.
FLUXUS ADM 6725 features an integrated measuring point multiplexer which enables quasi
simultaneous measurement on the different channels. Calculation measurement is also possible
(channel A - channel B for example).
UMADM6725V2-2EN, 03.04.2003 5
2 The Flowmeter
t0 t1 t2
∆t
Fig. 2.2: Transit-time difference ∆T
Because the medium in which the signals propagate is flowing, the transit time of the sound signals
propagating in the direction of flow is shorter than the transit time of the signal propagating against the
direction of flow.
The transit-time difference ∆T is measured and allows the determination of the average flow velocity
on the propagation path of the ultrasonic signals. A profile correction is then performed to obtain the
average flow velocity on the cross-section of the pipe, which is proportional to the volume flow rate.
FLUXUS tests with its special electronics the incoming ultrasonic signals for their usefulness for the
measurement and evaluates the plausibility of the measured values. The integrated microprocessors
control the complete measuring cycle, eliminating disturbance signals by statistical signal processing
techniques.
2.3 Applications
FLUXUS can be used everywhere where the pipe wall and the liquid to be measured are sonically
conductive. This is true for pipe walls consisting of homogeneous material, and for liquids which carry
only small amounts of solid particles or gas bubbles. Since ultrasonic waves also propagate in solid
materials, the transducers can be mounted outside the pipe, allowing for non-invasive measurement.
The transit time difference effect can be observed over the complete range of flow velocities found in
technical applications. Furthermore, it is independent of the electrical parameters of the fluid
(conductivity, dielectric constant, etc.). FLUXUS is thus a very versatile instrument.
Advantages:
• Non-invasive methods permits safe measurement on aggressive or high temperature media flowing
in closed conduits.
• Flow values can be measured without interruption of the process.
• The installation does not require any alterations to the pipe system.
• Straightforward mounting of the transducers and battery operated portable instrument allow flow
measurements at various locations in the plant and on pipes with different diameters. The
measurement does not influence the actual flow conditions.
6 UMADM6725V2-2EN, 03.04.2003
2 The Flowmeter
- +
UMADM6725V2-2EN, 03.04.2003 7
2 The Flowmeter
Note: The engravings should also form an arrow if the two transducers are mounted on
opposite sides of the pipe wall.
Connection
• Pull up the socket cover of the channel on which you want to connect the transducers.
• Insert the connector of the transducer cable in the socket. The red point on the connector should
face the red marking on the socket.
Attention! The power adapter/battery charging unit is not moisture-proof. Use it only in dry rooms.
8 UMADM6725V2-2EN, 03.04.2003
3 Handling
3 Handling
3.1 Scope of Delivery
On delivery, please make sure that all items of the following list (standard scope of delivery) are in the
package:
1 User's manual
1 Basic instrument, including inserted battery set (fully charged)
1 Power adapter and battery charging unit with integrated cables for connection with instrument
and mains
Transducers as per order, with integrated cables
2 Transducer mounting fixture with chains
1 Service set for transducer mounting chains
1 Tube of acoustic coupling compound
1 Serial interface cable
1 Interface adapter 9 pins / 25 pins
1 CD with software for data transmission
1 Transport case
Your package may contain other components according to your particular order. Model designation
and serial number are given on the data plate on the rear face of the FLUXUS. When contacting
VEGA, always have both of them at hand, as well as the number of the firmware version (see section
12.5).
3.3 Service
FLUXUS is a very reliable instrument. No service work is necessary. Always respect the handling
precautions and the instructions given in this manual. If FLUXUS is installed correctly, in an
appropriate location and as recommended, used cautiously and taken care of conscientiously, no
troubles should appear.
3.4 Cleaning
Clean the instrument with a soft cloth. Do not use detergents. Remove traces of acoustic coupling
compound from the transducers with a paper tissue.
UMADM6725V2-2EN, 03.04.2003 9
3 Handling
Attention! • Use only the battery set authorized by VEGA. This battery set can be ordered
from VEGA or an authorized dealer.
• The protective degree IP54 of the flowmeter is given only if the battery
compartment cover is screwed on the housing.
Attention! • Use only the battery set authorized by VEGA. This battery set can be ordered
from VEGA or an authorized dealer.
• The use of non-rechargeable batteries is prohibited.
• Take care to plug correctly the connector which prevents from reversing the polarity.
• Before recharging, discharge the battery set as far as possible in order to avoid
over-charging. FLUXUS signalizes that the battery is discharged as follows:
LOW BATTERY !
3.7 Storage
Always pack the instrument and its accessories into the respective compartments of the transport case
after measurements have been performed.
Wipe the transducers clean of traces of acoustic coupling compound.
In order to avoid scratches on the enclosure caused by the instrument handle during transport, tilt the
instrument handle towards the upper front face of FLUXUS and not onto the top side of the housing.
Avoid excessive cable bends especially when closing the transport case top cover.
10 UMADM6725V2-2EN, 03.04.2003
4 Getting Started
4 Getting Started
4.1 Switching ON/OFF
Press key to switch FLUXUS ON.
O- O+
Several keys have double functions. They can be used
for INPUT as well as for SELECTION.
MUX
O OFF DISP
In SELECTION mode, for example, the arrow-shaped
LF numerical keys operate as cursor keys.
LIGHT
General functions
Press this key to switch the flowmeter ON.
LIGHT
Switches the background lighting ON/OFF.
BRK RESET: Press these keys simultaneously to recover from an error. This
INIT
ENTER
RESET
has the same effect as restarting the unit. Data will not be affected.
UMADM6725V2-2EN, 03.04.2003 11
4 Getting Started
ON
INIT (coldstart): To initialize FLUXUS, press these keys simultaneously while
switching the flowmeter ON and hold them down until the main menu appears.
BRK INIT
Most parameters and settings are reset to the factory default values. The memory
will not be cleared.
Press 3 times BRK to switch the flowmeter OFF.
Menu selections
BRK Press on BRK to call the main menu.
O- O+
Selecting the menu entry at the left or at the right of the currently highlighted one.
LIGHT
Decimal point
Deletion of data. After the deletion of data, the previous value will be displayed.
Input of text
O- O+
Selection of the position of the character to be input.
DISP
Changes the currently selected character to an 'A'.
12 UMADM6725V2-2EN, 03.04.2003
4 Getting Started
NEXT
To automatically scroll upwards/downwards through the selected restricted ASCII
MUX character set. The character changes every second. The scrolling can be
interrupted by pressing any other key.
Finishes editing.
ENTER
UMADM6725V2-2EN, 03.04.2003 13
4 Getting Started
Use keys O-
and O+
to select one of the menus.
OON
Note: You can return to the main menu at any time by pressing key BRK.
Note: In this manual, all program entries and keys will appear in capital letters. Program entries
are in typewriter characters ("PARAMETER"). Submenus are separated from the main
menu entry by a backslash.
4.4 HotCodes
A HotCode is a specific key sequence which has to be entered to activate some settings. Enter
HotCodes in the main menu just after the flowmeter has been turned on. The HotCode itself is not
displayed during entry.
When the last digit has been entered, the main menu appears in the selected language and FLUXUS
greets accordingly. The selected language remain activated even after switching the unit OFF and ON
again. A language selection can be made as often as required.
Note: After initialization of the instrument ( while starting), the display will appear
in the factory preset language version.
Should you have entered the HotCode for the language version incorrectly, switch the unit off by
pressing BRK three times, then on again. Enter the HotCode again.
14 UMADM6725V2-2EN, 03.04.2003
4 Getting Started
4.6 LEDs
Table 4.3: Function of the Battery LED
LED off: The flowmeter works under normal operating conditions (battery or external power
supply).
LED on: Battery is being charged.
LED flashes Battery voltage is insufficient. Measurements are impossible. Battery set must be
(long intervals): charged or changed.
LED flashes Error during battery charging, e.g. no external voltage present.
(short intervals):
Note: The automatic power off function is not activated when the instrument works with an
external power supply.
UMADM6725V2-2EN, 03.04.2003 15
4 Getting Started
16 UMADM6725V2-2EN, 03.04.2003
5 Selection of the Measuring Point
UMADM6725V2-2EN, 03.04.2003 17
5 Selection of the Measuring Point
recommended distances to disturbance sources can not be observed for practical reasons for
example.
In the following examples, recommended straight inlet and outlet pipe lengths are given for different
types of flow disturbance sources to assist you in selecting the correct measuring point.
Table 5.1: Recommended distance from disturbance source (D = nominal pipe diameter at measuring
point, L = recommended distance)
18 UMADM6725V2-2EN, 03.04.2003
5 Selection of the Measuring Point
UMADM6725V2-2EN, 03.04.2003 19
5 Selection of the Measuring Point
Correct Disadvantageous
20 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
6 Basic Measurement
Once the measuring point has been selected (see chapter 5), the parameters of the pipe and of the
medium can be entered. The parameters must be entered separately for every available measuring
channel. They can be modified at any time later by calling the program branch PARAMETER again.
The parameters of the pipe now have to be entered for every measuring point.
The values that can be given to the parameters of pipe
and medium are limited by the characteristics of
Outer Diameter transmitter and transducers. FLUXUS will warn you if
1100.0 MAXIMUM the entered values do not respect these limits
(MINIMUM and MAXIMUM plausibility check).
(Example) In this example, the entered outer diameter was too big.
FLUXUS displays the maximal possible value for this
parameter (1100.0 mm in the case of transducers of
type Q and a pipe with a wall thickness of 50 mm).
Note: FLUXUS only accepts the parameters for a measuring channel if the program branch
PARAMETER has been gone through completely once.
The pipe parameters that you will now enter can be modified at any time later by calling the program
branch PARAMETER again.
Connect the transducers to the flowmeter if they are not already connected. Turn the flowmeter on.
If the display PARAMETER FROM appears at this point, at least a parameter record has been stored
and can be recalled now. A parameter record is a set of all the data required to perform a certain
measuring task: the pipe parameters, medium parameters, transducer parameters and output options.
You can create a parameter record for each of your measuring tasks. For more information on this
subject, see chapter 10.
UMADM6725V2-2EN, 03.04.2003 21
6 Basic Measurement
It is possible to change this menu in order to enter the pipe circumference instead of the diameter.
This setting is coldstart resistant and can be made in the program branch SPECIAL FUNCTION (see
section 12.2.1).
If the input of the pipe circumference is activated and you inadvertently enter a 0 (zero) in the OUTER
DIAMETER display, FLUXUS will switch to the PIPE CIRCUMFER. display. If you do not wish to enter
the pipe circumference, press BRK to return to the main menu and start the parameter input again.
Note: FLUXUS calculates the inner diameter (outer diameter - 2 x wall thickness) and checks if
this value is within the specified inner diameter range for the transducers used. An error
message is displayed if this is not the case. It is possible to modify the value of the
minimal pipe inner diameter accepted by FLUXUS for a certain type of transducer. See
section 8.8.
Note: It is possible to select which materials are to be displayed in the material selection list.
See section 11.1.
22 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
Important! Enter here that sound velocity of the material (longitudinal velocity or transversal velocity)
which is nearer to 2500 m/s.
Note: The longitudinal sound velocity of the material can be measured with FLUXUS. See
chapter 15.
Note: It is possible to select which materials are to be displayed in the material selection list.
See section 11.1.
Note: FLUXUS checks the correlation between the entered outer diameter, the pipe wall and
liner thickness. The inner diameter (outer diameter - 2 x wall thickness - 2 x liner
thickness) should be within the specified inner diameter range for the transducers used.
An error message is displayed if this is not the case.
UMADM6725V2-2EN, 03.04.2003 23
6 Basic Measurement
If the medium has been selected, FLUXUS jumps straight to the display for entering the medium
temperature (section 6.2.4). If you have selected OTHER MEDIUM, FLUXUS requests the entry of the
minimal and maximal sound velocity, the kinematic viscosity and the density of the medium.
Note: It is possible to select which media are to be displayed in the medium selection list. See
section 11.1.
Note: With older versions of the firmware, the lowest sound velocity that can be entered is
800.0 m/s.
24 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
6.2.3 Density
FLUXUS now asks for the density of the medium. This value is needed for calculating the mass flow
rate (= volume flow rate multiplied with the entered density).
Note: If you are not interested in measuring the mass flow rate, just confirm the displayed value
by pressing ENTER. This will not influence your results.
Note: The range of possible medium temperature depends on the operating range of the
selected transducers.
Attention! FLUXUS cannot guarantee for the precision of values obtained when working with
standard parameters. Measurement might be impossible.
UMADM6725V2-2EN, 03.04.2003 25
6 Basic Measurement
"√" means that the measuring channel is activated, "−" that the measuring channel is deactivated and "•"
that the measuring channel cannot be activated (you did not enter parameters for that channel).
Note: A measuring channel cannot be activated if its parameters are not valid (for example if
the program branch PARAMETER of the channel has not been worked through
completely).
At this point, FLUXUS asks for the measuring point number if the storage or the serial output of the
measuring data has been activated. See chapter 9.
26 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
strongly attenuating and where deposits can be found on the inner pipe wall, it is possible that the
amplitude of the signal is already insufficient for measuring after two transit paths.
Transducer installation Transducer installation
in diagonal mode in reflection mode
number of transits sound path number of transits sound path
1 2
3 4
etc. etc.
Fig. 6.1: Sound path
Note: Correct positioning of the transducer is easier for an even number of transit paths as for
an odd number.
Transd.Distance Transd.Distance
A: 54 mm ! A: 54 mm Diago
(Letter A = Measuring channel A) If you have entered the sound path factor numerically, ‘Refle’
(reflection mode) or ‘Diago’ (diagonal mode) appears behind
‘mm’.
The display indicates at which distance from another the transducer should be mounted (here: 54
mm). The transducer distance given here is the distance between the inner edges of the transducers.
For very small pipes, a negative transducer distance is possible, as illustrated in Fig. 6.2.
Note: The accuracy of the distance suggested by FLUXUS depends on the accuracy of both
the pipe and medium parameters entered.
A A A<0
A= Transducer distance
UMADM6725V2-2EN, 03.04.2003 27
6 Basic Measurement
Important! In order to obtain maximal acoustic contact between the pipe and the transducers,
pay attention to the following points:
• Rust or other deposits absorb the sound signals! Clean the pipe at the emplacement
where you plan to mount the transducers. Remove rust or loose paint. Grind off any
thick layer of paint.
• Always apply a bead of acoustic coupling compound lengthwise down the center of
the contact surface of the transducers.
• There should be no air or air pockets between transducer surface and pipe wall.
Make sure that the mounting fixture applies the necessary pressure on the
transducers.
Fig. 6.4: Side view and sectional view of a pipe with transducers fastened with chains and retaining clip
Fig. 6.5: Side view of the retaining clip Fig. 6.6: Top view of the retaining clip
• Insert the retaining clip into the groove on the top of the transducer and secure it using the knurled
screw.
• Apply some acoustic coupling compound to the contact surface of the transducer. Place the
transducer on the pipe and press it firmly.
• Take the spring end of the chain in the hand and insert the ball at its extremity in the vertical slot of
the retaining clip. Lay the chain around the pipe. When mounting the transducers on a vertical pipe
28 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
and FLUXUS is placed lower than the pipe, it is recommended to slip the cable of the upper
transducer under the chain in order to free it from mechanical strain.
• Pull the chain firmly and insert it in the lateral slot of the retaining clip. There should be no air or air
pockets between transducer surface and pipe wall.
• Mount the second transducer in the same way. Using a ruler, adjust the transducer distance to the
distance suggested by FLUXUS.
Note: When mounting the transducers on a vertical pipe with FLUXUS situated lower than the
pipe, it is recommended to slip the cable of the upper transducer under the tension strap
in order to free it from mechanical strain.
• Pull the chain firmly and insert it in the second slot on the top of the runner.
• Fix the other transducer in the same way.
UMADM6725V2-2EN, 03.04.2003 29
6 Basic Measurement
Fig. 6.8: Side view and sectional view of a pipe with transducers fastened with magnetic runners
• Insert the transducers in the runners. Turn the screw on top of the runners by 90° in order to
engage and lock its extremity in the groove on the top of the inserted transducer.
• Apply acoustic coupling compound to the contact surface of the transducers.
• Insert the ruler in the lateral slots of the runners (see Fig. 6.8). Adjust the transducer distance to the
distance suggested by FLUXUS and fix the transducers with the small plastic screws on the
transducer cable side of the runner.
• Place the runners/ruler assembly on the pipe at the measuring point. There should be no air or air
pockets between transducer surface and pipe wall.
• Adjust transducer distance again.
30 UMADM6725V2-2EN, 03.04.2003
6 Basic Measurement
DISP
Note: It is important for the flow measurement that the signal maximum with the shortest
transducer distance (shortest transit time) is used. However, this signal maximum should
not deviate from the suggested distance by more than ± 0.5 cm. In case of bigger
deviations, check if the entered parameter inputs are correct or repeat measurement at a
different location on the pipe.
Note: It is possible to have FLUXUS remind you of the last entered precise transducer distance
in this display. See section 12.2.4.
FLUXUS works with an integrated measuring point multiplexer which enables quasi simultaneous
measurement on the different channels. The flow is measured on one channel, which takes approx. 1
second, then the multiplexer switches to the next activated channel. The SIGNAL LED of an activated
channel flashes as the measurement takes place. The measuring time depends on the measuring
conditions. If for some reason the signal cannot be immediately detected, the measurement might take
longer than 1 second.
Note: The measurement of flow processes with high flow dynamics (transients) might be
impossible in normal measuring mode. For such measurements, activate the FastFood
mode (see section 8.6).
All process outputs as well as the serial interface continuously get the measuring results of the
assigned channel.
The results are displayed and output according to the actually selected output options (see chapter
7.1). Default setting is the display of volume flow rate in m3/h.
Chapter 7 describes the selection of the values to be displayed and the setting of the output options.
Advanced measuring functions are described in chapter 8.
UMADM6725V2-2EN, 03.04.2003 31
6 Basic Measurement
The medium flows in direction of the arrow if the display shows a positive flow reading (example:
54.5 m3/h).
The medium flows against the arrow direction if the display shows a negative flow reading (example:
-54.5 m3/h).
32 UMADM6725V2-2EN, 03.04.2003
7 Displaying the Measured Values
The selection of the physical quantity SOUND VELOCITY immediately ends the program branch
OUTPUT OPTIONS, because the process outputs, the serial interface and the data logger are not
active during the measurement of the sound velocity and there are thus no more settings to be made.
The measurement of the sound velocity is described in chapter 16.
For all quantities of measurement other than SOUND
Volume in: VELOCITY, a scroll list of the available measurement
units is displayed. Select the unit of measurement in
m3/h which you want to have the chosen physical quantity
displayed and output.
Confirm by pressing ENTER.
UMADM6725V2-2EN, 03.04.2003 33
7 Displaying the Measured Values
You can now return to the main menu by pressing BRK. The next displays of the program branch
OUTPUT OPTIONS are for the activation of the different output options (process outputs, data logger,
output to a PC, etc...).
NEXT
34 UMADM6725V2-2EN, 03.04.2003
7 Displaying the Measured Values
Use key to scroll through the different displays of the first line while measurement is going on.
Use key DISP to scroll through the different displays of the second line while measurement is going on.
A: Volume Flow The asterisk "*" indicates that the displayed value (here:
the flow velocity) is not the selected quantity of
* 2.47 m/s measurement (here: the volume flow).
UMADM6725V2-2EN, 03.04.2003 35
7 Displaying the Measured Values
54.5 m3/h .
The actual optimal transducer distance is given first in
parenthesis (here: 51.2 mm), then the entered
transducer distance (here: 50.8 mm). The optimal
transducer distance might change during measurement
due to temperature fluctuations for example. An
eventual mispositioning of the transducers (here:
-0.4 mm) will be internally compensated by FLUXUS.
36 UMADM6725V2-2EN, 03.04.2003
8 Advanced Measuring Functions
OON
OON
To reset the two flow totalizers to zero: Press 3 times key while a totalizer is displayed.
UMADM6725V2-2EN, 03.04.2003 37
8 Advanced Measuring Functions
OON
Note: With firmware version 5.41 and lower, you only have to press the keys or
OOFF
Note: The flow totalizers can only be activated for the measuring channel which measured
values are actually displayed.
Note: A keystroke which has influence on the totalizers will only be active if the upper line
of the display shows the total value. If the upper line of the display shows something
other than the totalizer, you need to press the key twice. The first keystroke will
display the totalizer. The second stroke will perform the actual function.
It is possible to output and store both the heat totalizer and the volume flow totalizer during heat flow
measurement. This setting can be activated in the program branch SPECIAL FUNCTIONS \ SYSTEM
SETTINGS \ MEASURING.
The behavior of the totalizer after a measurement has been stopped or after a reset can also be set in
the program branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING.
It is possible to store the value of the currently displayed totalizer only or one value for each flow
direction. In the SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING program branch, select
the QUANTITY STORAGE entry.
38 UMADM6725V2-2EN, 03.04.2003
8 Advanced Measuring Functions
Note: • The overflow of a totalizer influences all output channels, e.g. storage of
measured values, online output, etc.
• The output of sum of both totalizer (the throughput ‘ΣQ’) via a process output
will not be valid after the first overflow (wrapping) of one of the respective
totalizers.
• To signalize the overflow of a totalizer, activate an alarm output with the
switching condition QUANTITY and the type HOLD.
UMADM6725V2-2EN, 03.04.2003 39
8 Advanced Measuring Functions
When the test is activated (velocity limit > 0.0 m/s), every measured flow velocity will be compared
with the entered upper velocity limit. If the flow velocity is bigger than the limit:
• The flow velocity is marked as "invalid"; the measuring quantity cannot be determined.
• The LED of the channel shows red.
• The display shows a ‘!’ behind the unit of measurement. (In case of a ‘normal’ error, a ‘?’ appears.)
Attention! If the defined velocity limit is too small, measurement might be impossible - most
measured values are declared invalid.
If you have previously selected CUT-OFF FLOW \ SIGN, two cut-off values must be entered:
If you have previously selected CUT-OFF FLOW \ ABSOLUTE, only one cut-off value has to be
entered :
The limit comparison will be performed using the
Cut-off Flow absolute numerical value of the measured flow velocity.
5.0 cm/s
40 UMADM6725V2-2EN, 03.04.2003
8 Advanced Measuring Functions
preceded by "U".
Uncorrected flow velocities stored in the memory of the instrument or transmitted to a PC will be
marked as uncorrected ("UNCORR" appears near the unit of measurement).
UMADM6725V2-2EN, 03.04.2003 41
8 Advanced Measuring Functions
If the storage of measured values is activated, a new data set is created and the storing of the
measured values is started. The storing ends with the deactivation of the FastFood mode or with the
interruption of the measurement (key BRK).
Attention! • The values of the current measuring data set will be deleted when you
deactivate the FastFood mode and activate it again without stopping the
measurement.
• The values of the current measuring data set will be kept if you deactivate the
FastFood mode and stop the measurement before activating the FastFood
mode again. A new measuring data set will be created when the next
measurement is started.
42 UMADM6725V2-2EN, 03.04.2003
8 Advanced Measuring Functions
In addition to the physically existing ultrasonic measuring channels, FLUXUS offers two virtual
calculation channels (channels Y and Z). These two ‘virtual’ channels allows you to combine
numerically the measuring results of the two measuring channels (measured value of channel A minus
measured value of channel B for example).
The result of the numerical operation is the ‘measured value’ of the selected calculation channel. This
‘measured value’ is equivalent to the measured values of a measuring channel. Everything that can be
done with the measured values of an ultrasonic measuring channel (totalization, online output, storing,
process outputs, etc.) can also be done with the values furnished by a calculation channel.
UMADM6725V2-2EN, 03.04.2003 43
8 Advanced Measuring Functions
Make sure that the selected quantity of measurement can be calculated out of the quantities of
measurement of the two input channels selected for the calculation function. Table 8.1 shows which
combinations are possible.
Table 8.1: Measuring quantity for the calculation channel
Measuring quantity of Possible physical quantity of the first Possible physical quantity of the
the calculation input channel (CH1) second input channel (CH2)
channel
Flow Volume Mass Heat Flow Volume Mass Heat Flow
Velocity Flow Flow Flow Velocity Flow Flow
Flow Velocity X X X X X X X X
Volume Flow X X X X X X
Mass Flow X X X X X X
Heat Flow X X
Example 1: You wish to determine the difference of the volume flow rates of the channels
A and B. The physical quantity of measurement of channel A can be the volume flow or
the mass flow, but not the flow velocity. The physical quantity of measurement of channel
B can also be the volume flow or the mass flow. The quantities of measurement of the
two input channel do not have to be identical (channel A = mass flow; channel B =
volume flow).
Example 2: For determining the heat flow difference, the physical quantity of
measurement must be the heat flow for both input channels A and B.
Select the measuring units.
Mass in: Confirm by pressing ENTER.
kg/h
44 UMADM6725V2-2EN, 03.04.2003
8 Advanced Measuring Functions
Proceed to positioning of the transducers for all activated physical channels. The measurement will
automatically start after this procedure.
When a calculation channel has been activated,
Y: Volume Flow FLUXUS automatically switches to HumanMux mode at
the beginning of the measurement (see section 7.2) and
-53.41 m3/h displays the values of the calculation channel. If you
switch to AutoMux mode, the measured values of the
different physical channels (and not of the calculation
channels) will be displayed alternately.
DISP
UMADM6725V2-2EN, 03.04.2003 45
8 Advanced Measuring Functions
46 UMADM6725V2-2EN, 03.04.2003
9 Storage and Output of Measured Values
Note! Per default, FLUXUS emits an acoustic signal every time a measured value is stored.
This signal can be deactivated, see section 9.4.6.
UMADM6725V2-2EN, 03.04.2003 47
9 Storage and Output of Measured Values
Note: If you don't set the storage rate, the default rate or the last rate selected will be used.
Note: If whether the storage of measured values nor the serial output is activated, FLUXUS will
omit the display group OUTPUT OPTIONS \ STORAGE RATE.
Note: The storage interval in seconds should be at least equal to the number of activated
measuring channels. (When 2 measuring channels are activated, the storage rate for a
channel should be at least 2 seconds.)
When the measurement is started, FLUXUS will store the designation and the parameters of the
measuring point together with the measured values.
9.1.4 Measurement
When measuring with activated storage function, this
DATA MEMORY error message will appear in case of a memory
overflow. Confirm the message by pressing ENTER.
OVERFLOW !
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9 Storage and Output of Measured Values
Attention: FLUXUS will interrupt measurement if the internal memory is full and no other output
option as storing has been activated!
If another output option (serial output, process output, etc.) has been activated, FLUXUS
won't interrupt measurement. Only the storage of measured data will be stopped. The
error message DATA MEMORY OVERFLOW appears periodically.
UMADM6725V2-2EN, 03.04.2003 49
9 Storage and Output of Measured Values
FLUXUS transfers the measured data via the serial interface in the format described in section 9.2.3.
The measuring point query is activated (see section 9.1.1). An acoustic signal is emitted every time a
measured value is transmitted (this signal can be deactivated, see section 9.4.6).
Example: With a storage rate of 1 s, 10 dummy lines will be transmitted when the measurement is
restarted after an interruption of 10 seconds for positioning the transducers.
50 UMADM6725V2-2EN, 03.04.2003
9 Storage and Output of Measured Values
Transmission parameters
RS232: 9600 bits per second, 8 data bits, even parity, 2 stop bits, protocol (RTS/CTS)
FLUXUS sends CRLF-terminated ASCII.
Maximal line length: 255 characters.
Scroll through the list until you reach the DEL MEAS
Special Funct. VAL option.
Delete Meas.Val. Confirm by pressing ENTER.
UMADM6725V2-2EN, 03.04.2003 51
9 Storage and Output of Measured Values
Important
• The storage mode does not influence the continuously operating process interfaces (e.g. current
loop, voltage output...).
• In AVERAGE mode, all primary measuring quantities are averaged, i.e. also the measured
temperatures if the respective measuring channel are activated.
• In case no mean value could be calculated over the complete storage interval while the unit was in
AVERAGE mode, the mean value for this interval will be marked as invalid. In the ASCII file with the
stored measured values, ´???´ will appear for invalid mean values and the associated quantity of
measurement, and ´?UNDEF´ for invalid temperatures. There will be no indication of how many
momentary measured values a valid mean value consists of.
Important:
• FLUXUS will store the totalizers only if they are activated and the storage function enabled.
• The storage of one totalizer approx. reduces by two thirds the total number of measured values
which can be internally logged.
Example:
In the program branch SPECIAL FUNCTION, FLUXUS shows that 10,000 measured values can
still be stored. If the totalizers are activated and only one total value is logged, 3,333 data fields are
available for storage. If both total values are saved, 2,000 data storage operations can be made.
52 UMADM6725V2-2EN, 03.04.2003
9 Storage and Output of Measured Values
54.5 m3/h Press key one or several time to scroll through the
different displays of the first line while measurement is
going on.
FLUXUS can store a maximum of 100 measuring data sets. The number of data sets that can be
created depends on the total number of measured values stored in the precedent data sets.
When all stored measured values have been deleted and a new measurement is started with only one
quantity of measurement on one channel and no totalization, approx. 27,000 measured values can
be stored in the data set of that measurement.
Proceed as follows to find out how much memory is still available for storage.
UMADM6725V2-2EN, 03.04.2003 53
9 Storage and Output of Measured Values
Instrum. Inform.
54 UMADM6725V2-2EN, 03.04.2003
10 Working with Parameter Records
Note: A new instrument contains no parameter records. Parameter records must be entered
manually.
• select CURRENT RECORD, press key 0 or and confirm with ENTER to edit the current
parameters as usual.
UMADM6725V2-2EN, 03.04.2003 55
10 Working with Parameter Records
56 UMADM6725V2-2EN, 03.04.2003
10 Working with Parameter Records
UMADM6725V2-2EN, 03.04.2003 57
10 Working with Parameter Records
The measuring point parameters saved in ParaPool are not affected by the disabling of the ParaPool
option. They will be ready for access as soon as the ParaPool option is enabled again.
58 UMADM6725V2-2EN, 03.04.2003
10 Working with Parameter Records
Note: The record name can be entered in alphanumerical mode or in numerical mode. See
section 12.2.3.
UMADM6725V2-2EN, 03.04.2003 59
10 Working with Parameter Records
Note: The record name can be entered in alphanumerical mode or in numerical mode. See
section 12.2.3.
60 UMADM6725V2-2EN, 03.04.2003
11 Libraries
11 Libraries
The internal data bank of the instrument contains the properties of more than 20 different materials
(pipe material, lining) and more than 40 different media. It is possible to select the materials and fluids
displayed in the selection lists of the program branch PARAMETER (pipe material, lining, medium). You
can thus adapt the list to your specific measuring tasks and the shorter selection lists make your work
more efficient (see section 11.1.1).
An integrated coefficient storage (user area) allows you to define new materials and media. If
necessary, the properties of these new materials and media can be defined as temperature-dependent
or pressure-dependent polynomials. The coefficient storage can be partitioned as you like. For more
information about user materials and media, see section 11.2.
Note: User materials and media are always displayed in the selection lists of the program branch
PARAMETER.
UMADM6725V2-2EN, 03.04.2003 61
11 Libraries
Note: If you quit the edition menu with BRK before saving, all changes will be lost.
Note: The materials/media will appear in the list in the order in which they have been added.
62 UMADM6725V2-2EN, 03.04.2003
11 Libraries
Note: User materials/media are always part of the current user-defined selection list. They cannot
be deleted.
Note: User materials/media are always part of the current user-defined selection list. They cannot
be deleted.
Note: The user area must be partitioned before any data can be stored.
UMADM6725V2-2EN, 03.04.2003 63
11 Libraries
• Steam coefficients
• Concentration coefficients
The maximal number of data sets for each of these categories are given in Table 11.1.
Table 11.1: Capacity of the user area
64 UMADM6725V2-2EN, 03.04.2003
11 Libraries
UMADM6725V2-2EN, 03.04.2003 65
11 Libraries
Enter only those properties which are relevant for your measuring task.
Example: The density of a medium is unknown. If the mass flow rate is not of interest, you
may set the density to any constant value. The measurement of flow velocity and volume flow
rate is not affected by this. However, the value of the mass flow rate will be wrong.
The dependency of certain properties on process quantities (temperature, pressure) can be described
by polynomials of grade 0 to 4 or by other specialized interpolation functions. In most cases although,
constant values or a linear dependency are quite sufficient. For instance, if the temperature
fluctuations at the measuring point are small compared with the temperature dependencies of the
properties, considering a linear dependency or completely neglecting the temperature dependency will
not result in a considerable additional measuring error. If the process conditions fluctuate strongly and
the properties of the involved materials/media have a pronounced temperature dependency (as the
viscosity of hydraulic oils for example), polynomials or other specialized functions should be used for
the interpolation.
In case of doubt, consult VEGA to find the best solution for your specific measuring task.
Specialized Interpolations
Some dependencies are approximated in an unsatisfactory way by polynomials. FLUXUS offers some
specialized interpolation functions (option "Basics:Y=f(x,z)"). Multidimensional dependencies
(y=f(T,p)) can also be approximated with these specialized functions.
Contact VEGA for further information about specialized interpolations.
In the SPECIAL FUNCTIONS \ SYSTEM SETTINGS
Libraries \ LIBRARIES program branch, select the entry
EXTENDED LIBRARY.
Extended Library
Confirm by pressing ENTER.
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11 Libraries
Note: There are 95 ASCII-characters (letters, capital letters, numbers, special characters [! ? " + - (
) > < % * ~ etc.] available for the designation of your material/medium, with a maximum of 16
characters per designation. The input of text is described in section 4.2.
FOR A MATERIAL:
FLUXUS asks for the sound velocity of the material.
c-Material Table B . 1 of Appendix B gives the sound velocities of
some materials. Values between 600.0 and 6553.5 m/s
1590.0 m/s are accepted.
Confirm by pressing ENTER.
UMADM6725V2-2EN, 03.04.2003 67
11 Libraries
FOR A MEDIA:
Enter the minimum value of the sound velocity (in m/s)
c-Medium MIN for the medium you want to measure. Values between
800.0 and 3500 m/s are accepted.
1400.0 m/s
Confirm by pressing ENTER.
68 UMADM6725V2-2EN, 03.04.2003
11 Libraries
You will now be requested to enter the transversal and longitudinal sound velocity of the material in
m/s. Depending on the selected dependence of the material properties on the process quantities, you
will have to enter one to five coefficients for each material property. Confirm each value with ENTER. If
you are editing an already defined material, FLUXUS will ask you for each property if it should be
edited. Select YES or NO and confirm by pressing ENTER, then edit the coefficients.
UMADM6725V2-2EN, 03.04.2003 69
11 Libraries
You will now be requested to enter the longitudinal sound velocity (in m/s), the kinematic viscosity (in
mm2/s) and the density (in g/mm3) of the medium. Depending on the selected dependence of the
medium properties on the process quantities, you will have to enter one to five coefficients for each
medium property. Confirm each value by pressing ENTER. If you are editing an already defined
medium, FLUXUS will ask you for each property if it should be edited. Select YES or NO and confirm by
pressing ENTER, then edit the coefficients.
70 UMADM6725V2-2EN, 03.04.2003
11 Libraries
Attention! FLUXUS does not control the coefficients entered. Absurd coefficients can lead to absurd
measured values or result in permanent numerical system errors.
Select the medium for which you want to enter the heat
Heat-Coeffs for flow coefficients.
BEER User media are displayed first, followed by the media of
the internal data bank.
UMADM6725V2-2EN, 03.04.2003 71
11 Libraries
Attention! FLUXUS does not control the coefficients entered. Absurd coefficients can lead to absurd
measured values or result in permanent numerical system errors.
Attention! FLUXUS does not control the coefficients entered. Absurd coefficients can lead to absurd
measured values or result in permanent numerical system errors.
72 UMADM6725V2-2EN, 03.04.2003
12 Settings
12 Settings
12.1 Setting the Internal Clock
FLUXUS features a battery buffered clock. During measurement, the data are automatically stamped
with date and time.
Use keys O-
and O+
to select the digit to be
TIME 11:0 0 edited.
Set Time ! O ON
Use keys O-
and O+
to select the digit to be
DATE 25.01.2002 edited.
Set Date ! O ON
UMADM6725V2-2EN, 03.04.2003 73
12 Settings
Note: FLUXUS stores the DIALOG/MENUS settings at the end of the dialogue. If you leave the
program branch before the end of the dialogue, your settings won't be effective.
Note: The edition of the circumference is of a temporary nature. When the unit switches back to
the display of the pipe circumference (internal re-calculation), slight rounding errors may
occur.
Example: Entered circumference = 100 mm, displayed outer diameter = 31.8 mm. When
the unit switches back to the circumference internally, a value of 99.9 mm will be
displayed.
74 UMADM6725V2-2EN, 03.04.2003
12 Settings
When the STEAM IN INLET option is activated, you will be asked to enter the inlet pressure in the
program branch PARAMETER.
UMADM6725V2-2EN, 03.04.2003 75
12 Settings
Note: FLUXUS stores all changes now at the end of the configuration dialogue.
Note: FLUXUS stores the MEASURING settings at the end of the dialogue. If you leave the
program branch before the end of the dialogue, your settings won't be effective.
76 UMADM6725V2-2EN, 03.04.2003
12 Settings
Cut-off Flow
>ABSOLUTE< sign
You can define here a lower limit for the flow velocity.
See section 8.4.
Cut-off Flow
factory >USER<
You can enter here an upper limit for the flow velocity
(see section 8.3). Values between 0.1 and 25.5 m/s
Velocity limit are accepted. Entering "0" switches off the flow
24.0 m/s velocity control.
Note: FLUXUS stores all changes of the SYSTEM SETTINGS now at the end of the dialogue.
UMADM6725V2-2EN, 03.04.2003 77
12 Settings
O-
decreases contrast
= medium contrast
OON
= maximum contrast
Note: The contrast will be reset to "medium" after a coldstart. With firmware version 5.32 and
higher, you can also set the contrast to "medium" by entering the HotCode 555000.
78 UMADM6725V2-2EN, 03.04.2003
12 Settings
If the external power supply is disconnected during the charging process, the following error message
will appear:
Attention! • Use only the battery set authorized by VEGA. This battery set can be ordered
from VEGA or an authorized dealer.
• The use of non-rechargeable batteries is prohibited.
• Take care to plug correctly the connector: its shape prevents from reversing the
polarity.
UMADM6725V2-2EN, 03.04.2003 79
12 Settings
80 UMADM6725V2-2EN, 03.04.2003
13 SuperUser Mode
13 SuperUser Mode
The SuperUser mode gives you the opportunity for experimental work.
Features of the SuperUser mode:
• The flowmeter operates without observing pre-set standard parameters
• There are no plausibility checks when parameters are being entered.
• FLUXUS does not control if the entered values respect the limits given by physical laws and
specifications.
• The cut-off flow velocity is not active.
• The sound path factor must always be entered numerically.
It is possible to modify the value of the minimal pipe inner diameter accepted by FLUXUS for a certain
type of transducer without entering the SuperUser mode. Refer to section 8.8.
13.1 Activating/Deactivating
Enter the HotCode 071049 to activate the SuperUser mode.
You can also deactivate the SuperUser mode by switching FLUXUS off.
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13 SuperUser Mode
Note: Switching OFF and resetting both deactivate the SuperUser mode.
82 UMADM6725V2-2EN, 03.04.2003
14 Time-programmable Measurement
14 Time-programmable Measurement
The time-programmable measuring mode allows the user to program the beginning and the end of a
measurement. FLUXUS waits for the defined start time and then automatically starts the measurement
as well as the storage and the output of the measured values. FLUXUS can also automatically stop
the measurement. The time-programmable measurement allows you to record process data at a high
storage rate at the needed time, instead of having to measure the whole time at a low storage rate in
order to have enough storage capacity left when needed.
Note: The internal clock of FLUXUS works with a 24-hours clock. Times must therefore be
specified in the 24-hour style, e.g. 02:35 PM = 14:35.
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14 Time-programmable Measurement
As soon as a valid start time has been entered, the display to set the start date appears.
Set the day, month and year. Confirm the set start date
START: 25.01.2002 by pressing ENTER.
Set Date If the entered start time exists and is in the future,
FLUXUS will ask for the stop time (section 14.3).
Note: The seconds for the start time are set to zero automatically. Therefore, the set start time
must be at least one minute ahead of the actual time.
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14 Time-programmable Measurement
Option Result
DON'T STOP Measurement will not be stopped automatically unless if:
• the batteries are empty or
• the internal memory is full and no output option other
than storing has been selected.
STOP: DATE/TIME You can define the date and time of the automatic stop.
STOP: DURATION You can define the duration of the measurement.
FLUXUS will then calculate when the measurement
should be stopped (START + DURATION = STOP).
Note: Every hour FLUXUS waits for the start time reduces the battery capacity by 2%. This
reduces the operating time left for the measurement accordingly.
In our example, FLUXUS starts the measurement on 30/04/2001 at 04:15, will measure for 4 hours
and automatically stop the measurement at 08:15.
DISP
UMADM6725V2-2EN, 03.04.2003 85
14 Time-programmable Measurement
DISP
Note: The countdown can be stopped at any time by pressing key BRK.
The memory requirements for the operational activities to come can now be calculated. If a stop time
or a measurement duration has been defined and the storage of measured values is activated,
FLUXUS checks if the free memory capacity is sufficient to store the measured values for the duration
of measurement. If it is not, the following display will appear:
DISP
If storing is the only output option activated, the measurement will be stopped when the memory is full,
even if the stop time is not reached. If another output option is also activated, FLUXUS will continue
the measurement until the defined stop time is reached even if the memory is full.
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14 Time-programmable Measurement
The countdown
Use key DISPto switch between the display of the start and
25.01. /15:18:44 the display of the time remaining before measurement
26.01. /04:15:00 start ("*Ç") on the lower line.
DISP
At any time during the countdown, you can check if a stop time has been programmed. Press key
to display information on the upper line.
• This message appears on the upper line when no
NO STOP DEFINED stop time has been programmed.
The measurement
When the defined start time is reached, FLUXUS continues the previously interrupted measurement.
During the measurement, you can check if a stop time has been programmed:
DISP
Note: The programmed measurement can be stopped at any time by pressing key BRK.
UMADM6725V2-2EN, 03.04.2003 87
14 Time-programmable Measurement
88 UMADM6725V2-2EN, 03.04.2003
15 Wall Thickness Measurement
Plug for
FLUXUS
socket
¬ « Probe with
connection
socket on the
side for
probe cable
Plug for ¬
probe
socket
Test piece
Fig. 15.1: Wall thickness
probe assembly Fig. 15.2: Measuring principle
Note: With some exceptions, the transversal sound velocity for a material is about 30% to 60%
of the longitudinal sound velocity.
The main menu of the WTM option is displayed. The menus are similar to those of the flow
measurement mode. The program branches are adapted to wall thickness measurement.
UMADM6725V2-2EN, 03.04.2003 89
15 Wall Thickness Measurement
Note: • The measurement will only start if a c-LONGITUDINAL other than zero is entered.
• Unlike in the case of flow measurement, the sound velocity has here a great
influence on the result. It influences the measuring result in an approximately linear
fashion. A sound velocity 10% higher than the actual one gives a wall thickness
approximately 10% too high.
• The actual sound velocity of a material often differs substantially from the values
published in the literature because it depends on the composition and on the
manufacturing process of the material as well as on temperature. The sound
velocities given Table B . 1 of Appendix B should only serve as orientation values.
• The longitudinal sound velocity in a given material can be measured precisely using
a comparative block of known thickness. See section 15.3.1.
Note: The wall thickness influences the measuring result in an approximately linear fashion.
Thus, the input of a wall thickness 10% higher than the actual one gives a sound velocity
approximately 10% too high.
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15 Wall Thickness Measurement
15.3 Measurement
Select in the main menu the program branch
par >MEA< opt sf MEASURING. Confirm by pressing ENTER.
MEASURING-WTM
Attention! The sound velocity of the material depends on the temperature. The measurement of the
sound velocity using a comparative block should thus be performed at the location where
flow measurement will be performed later, in order to obtain the sound velocity at the
right temperature.
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15 Wall Thickness Measurement
DISP
Note: • Use a small amount of coupling compound. Always apply the coupling
compound in the same way to avoid fluctuations caused by different film
thickness.
• Apply constant pressure when pressing the probe against the test piece.
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15 Wall Thickness Measurement
UMADM6725V2-2EN, 03.04.2003 93
15 Wall Thickness Measurement
94 UMADM6725V2-2EN, 03.04.2003
16 Measuring the Sound Velocity of the Medium
This selection immediately ends the program branch OUTPUT OPTIONS since the sound velocity
measurement is whether stored nor transmitted to the outputs.
Select the program branch MEASURING and activate all
A:c-Medium ca. ? channels on which you want to measure. For the
channel on which the SOUND VELOCITY is to be
1475 m/s measured, FLUXUS will ask for an estimated value of
the sound velocity of the medium. Enter a value between
800 and 3500 m/s are accepted.
Confirm by pressing ENTER.
Select YES to measure in reflection mode, NO to
A:Reflection Mod measure in diagonal mode. Generally, the correct
positioning of the transducers in reflection mode is
no >YES< easier than in diagonal mode.
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16 Measuring the Sound Velocity of the Medium
ESTIMATED VALUE
TOO LARGE !
In both cases, the entered estimated value for the
sound velocity differs too much from the real sound
velocity of the medium. The transducers were
positioned to a parasitic signal or an echo.
ESTIMATED VALUE
TOO SMALL !
Take note of error messages by pressing ENTER. Enter a new estimate for the sound velocity.
Press keys and DISP to obtain further information in the upper or lower line of the display.
3
D ISP
Current transducer distance (L):
Curr.Trans.Dist. Distance entered during the last positioning of the
L= 25.5 mm transducers. The sound velocity is calculated using this
value.
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16 Measuring the Sound Velocity of the Medium
The cycle can be repeated as often as necessary. In most cases, one or two cycles are quite enough
for measuring the sound velocity.
Select YES to store the measured sound velocity in the
Store data ? actual parameter record for flow measurement.
no >YES<
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16 Measuring the Sound Velocity of the Medium
98 UMADM6725V2-2EN, 03.04.2003
17 Concentration Measurement
17 Concentration Measurement
If FLUXUS is equipped with the concentration measurement option, concentration measurement is
possible when following conditions are fulfilled:
• Valid parameters and concentration coefficients for the measured media are available in the
FLUXUS internal data bank.
• The measurement of the temperature of the medium (via Pt100 or current input) is activated.
The measured concentration can be stored and output with the other measured values.
c measured − ( K 0 F 1 + K1F 1 ⋅ T )
K=
K 0 F 2 + K 1F 2 ⋅ T
with K the concentration in mass percent, c the sound velocity in m/s and T the temperature in °C. The
concentration coefficients K0 and K1 define the family of characteristics of the measured constituent.
They have already been determined in our laboratories or will be determined on you installation basing
on parallel measurements of the concentration. The coefficients are saved in the internal data base as
properties of an user-defined medium.
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17 Concentration Measurement
c = cmeas + K 0 + K1 ⋅ T + K 2 ⋅ T 2 + K 3 ⋅ T 3 + K 4 ⋅ T 4
with c the sound velocity in m/s, K 0 , K1 , K 2 , K 3 , K 4 the calibration coefficients and T the temperature
in °C.
In the Fluid c-Calibr. display, select YES to edit
Fluid c-Calibr. the calibration polynomial.
Edit? no >YES< Confirm by pressing ENTER.
You can now edit the calibration polynomial for the measured sound velocity.
17.4 Measurement
Once the concentration measurement has been enabled, the concentration (in mass percent) will
automatically be displayed in the program branch MEASUREMENT:
K=Concentration
A:K= 82.4 M%
Example: FAIL_10= Temperature of medium not available (since HEX 10 = DEC 16 = BIN 10000)
FAIL_20 = Sound velocity not available
FAIL_04 = Temperature out of the range of the coefficients
FAIL_0C = Temperature and concentration out of the range of the coefficients
Features
• If the inlet or outlet temperature is known and constant during the whole measuring period, this
temperature can be entered manually and the corresponding temperature sensor must not be
connected.
• FLUXUS needs 10 medium dependent coefficients for heat flow measurement. The heat flow
coefficients of some media (water and Shell Thermina B for example) are already stored in the
FLUXUS internal data base. The coefficients of the other media must be entered.
• A temperature correction value (offset) can be defined for each temperature input (see section
18.4).
• If the pressure in the inlet is constant or if the pressure of the inlet can be measured with an
additional process input, FLUXUS can measure the heat flow rate/heat quantity correctly
independently of the state of the medium in the inlet (liquid or vapor). See section 18.5.
18.1 Settings
In the main menu, select the program branch OUTPUT
par mea >OPT< sf OPTIONS.
Output Options
INLET OUTLET
Outlet temperature
measurement
TINLET CHANNEL A
ULTRASONIC FLOWMETER
BATTERY INIT
RESET
Attention! The heat flow coefficients are defined in such a way that the flow must always be
measured at the outlet of the system.
• Take the spring end of the ball chain and insert the
last ball in one of the slots on the top of the sensor.
• Lay the chain around the pipe, pull the chain firmly
and insert it in the second slot of the sensor.
• Connect the temperature sensor to the corresponding temperature input socket at the back of the
flowmeter.
18.3 Measuring
Start the measurement as usual.
An error message will appear if there are no heat flow
Heat Flow coefficients available for the selected medium.
*INVALID MEDIUM*
Note: The input of a fixed temperature value is sometimes advisable, for example if the
measurement at the inlet cannot be easily undertaken, but the temperature is known and
constant.
Note: If you select OFF, the temperature correction will be deactivated for all inputs. However
FLUXUS remembers the defined correction values for each temperature input. These
values will be displayed when the function is re-activated.
Attention! The measurement of the volume flow rate, and thus of the heat flow, is only possible
when the heat carrier is liquid in the outlet.
The steam coefficients of water are stored in the FLUXUS internal data bank. The coefficients of other
media must be entered using the Windows utility FluxKoef.
Note: The STEAM IN INLET display will appear independently of the selected quantity of
measurement. However, the inlet pressure will be considered only for heat flow
measurement.
During measurement of the heat flow rate, press key one or many time to have the state of the
medium displayed on the upper line.
This message appears if the medium in the inlet is
completely in its liquid state.
Inlet=FLUID
426.23 kW
19 Process Inputs
External sensors measuring the following process properties can be connected to the process inputs
(if available):
• temperature,
• density,
• pressure,
• kinematic viscosity,
• dynamic viscosity.
FLUXUS can be equipped with a maximum of 4 inputs. The values given by the current, voltage or
temperature inputs can be used by the different measuring channels.
A process input must be linked to a measuring channel (sections 19.1 and 19.2) and activated (section
19.3) before it can be used for measurement, display and data storage.
Note: When a new input module has been built in, FLUXUS has to be rebooted (RESET or
Power OFFÆON) in order to enable it to detect the newly available inputs.
Note: The measuring quantity HEAT FLOW appears in the program branch OUTPUT OPTIONS
of a given measuring channel only if you have linked an inlet and an outlet temperature to
that channel.
FM-channel A FM-channel B
T1
T2
T3
T4
max. 4x Pt100
constant-
FLUXUS will now ask in the same way which temperatures should be linked to channel A as T-Outlet,
T(3) and T(4), and then which temperatures should be linked to the other channels.
Note: FLUXUS stores the configuration of a measuring channel when switching to the
configuration of the next channel. You must go through the whole configuration dialogue
for this channel to save changes.
Note: FLUXUS stores the configuration of a measuring channel when switching to the
configuration of the next channel. You must go through the whole configuration dialogue
for this channel to save changes.
Temperature inputs must be activated if you want the measured temperatures to be displayed, stored
and/or output with the other measured values, or if you wish the temperature to be used for the
interpolation of the viscosity and density of the medium.
Note: The activation of a temperature input reduces the total number of measured values that
can be stored.
Note: The activation of a process input reduces the total number of measured values that can
be stored.
+ -
Respect the polarity to avoid damaging the current source. A permanent shorting of
both terminals could destroy the current input.
If you inverse the polarity of the signal, only the sign of the
+ - measured current will change.
0..20 mA
CURRENT INPUT PASSIV
20 Process Outputs
If your instrument is equipped with process outputs, these outputs must be installed and activated
before they can be used.
The installation of an output consists of three steps:
• Assigning a measuring channel (source channel) to the output.
• Defining the measured value the assigned channel should transmit to the output (source item) and
the properties of the signal.
• Defining the behavior of the output in case no valid measured values are available.
Afterward, the installed output must be activated (program branch OUTPUT OPTIONS). Only after this
procedure has been gone through will measured values be available at the outputs.
Note: FLUXUS stores the configuration of an output at the end of the installation dialogue. If
you leave the installation dialogue by pressing BRK, changes won't be saved.
I1:Output MIN
10.0 mA
If you have selected OTHER RANGE, enter the minimal
output value (OUTPUT MIN) and the maximal output
value (OUTPUT MAX).
I1:Output MAX Confirm each value with ENTER.
11.0 mA
Example:
The flow volume was selected as source item for the current loop, the current loop range was set to
4/20 mA, the error value delay td to a value greater as zero.
t
t0 t1
20
Error-value td
Minimum (4.0mA)
4
t
I [mA]
20
Error-value
Hold last value
4
t
I [mA]
20
Error-value
Maximum (20.0mA) td
4
t
Error-value
I [mA]
Other value ...
20
td
Error-value: 4
2.00 mA t
Note: FLUXUS stores your settings now at the end of the dialogue.
Select YES.
B1= OFF Confirm by pressing ENTER.
Again? no >YES<
(black)
+
Px-
-
+
A smaller RLOAD diminishes
+
V
(black) - the precision.
Ri=500Ω Px-
+
RC
Open-Collector V
(black)
+
-
Px- -
UH Ic = 1 to 4 mA
Example :
The output range 4/20 mA was selected for a current loop, the zero-scale value was set to 0 m3/h and
the full-scale value to 300 m3/h.
A signal of 20 mA will be transmitted to the current output when a flow rate of 300 m3/h is measured.
For a measured current of 0 m3/h, a signal of 4 mA will be transmitted.
Note: The display PULSE OUTPUT only appears in the program branch OUTPUT OPTIONS if a
pulse output has been installed.
FLUXUS then displays the maximum possible flow in the pipe that the pulse output can work with. This
value is calculated from the data given for pulse value and pulse width. If the actual flow exceeds this
'Max-Value', the pulse output will not function properly. In such a case, the pulse value and pulse width
should be changed to accommodate the flow conditions. Confirm the maximal value by pressing
ENTER.
Attention! If the actual flow rate exceeds this 'Max-Value', the pulse output will not function
correctly.
A maximum of three alarm outputs operating independently of each other can be linked to each
channel. The alarm outputs can be used for the output of status information about the ongoing
measurement or to start and stop control pumps, electrical motors or other equipment.
Attention: When FLUXUS is not measuring, all alarms are in de-energized state, independently of
the programmed function.
Use keys O-
and O+
to select an scroll list on the first line.
OON
Note: During measurement, the limit values will always be interpreted in terms of the unit of
measurement that was selected at the time the quantity limit was set. The limit value
stays the same even if the quantity and/or unit of measurement is changed. If you
change the unit of measurement, also change the quantity limit.
(Example: You have entered a limit value of 60.0 m3/h, then changed the unit of
measurement to m3/min. You should also change the quantity limit from 60.0 m3/h to
1.0 m3/min).
• (only in firmware version 5.42 and higher) During measurement, pressing key C three times will
switch all alarms to their idle state. However, all alarms which switching condition is still met will
switch back into their active state after 1 second. Use this function to reset an alarm of type HOLD
when the switching condition is not met anymore.
• Pressing BRK stops measurement and brings you back to the main menu. All alarms are switched
to their de-energized state, independently of their programmed idle state.
0
Alarms with switching condition +Ö- -Ö+
(sign change) and type NON-HOLD will
switch in their activated state for about -
1 second with any change of flow direction.
Alarm Type: NON HOLDING
approx. 1 s
Alarms with switching condition ERROR will only switch in their activated state after several
unsuccessful measuring attempts (the LED of the channel lights red). Therefore, typical short-term
disturbances of the measurement as, for example, air bubble caused by pumps being switched on, will
not activate the alarm. If the alarms are of type NON-HOLD, they will switch back as soon as a valid
measured value is obtained (the LED of the channel lights green).
If there is an internal adaptation to changing measuring conditions, e.g. to a considerable rise of the
medium temperature, the alarm will not switch.
Alarms with the switching condition OFF will automatically be set to the mode NO CONT. The alarm is
de-energized.
It is possible to have the state of the alarms displayed during measurement. This function can be
activated in program branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ DIALOGS/MENUS. This
setting is coldstart resistant.
Select the SHOW RELAIS STAT option. Select ON to
SHOW RELAIS STAT activate the display of the alarms' state.
off >ON< DISP
R =
NON- NO
1 no function CLOSED
HOLD (normally open)
NC
2 MAX HOLD OPEN
(normally closed)
3 MIN
+ Æ-
- Æ+
QUANTITY
ERROR
21 Troubleshooting
First Step: Which of the followings describes the best your problem?
If any problem appears which cannot be solved with the help of this chapter, please contact VEGA,
giving a precise description of the problem. Don't forget to specify the model, serial number and
firmware version of your instrument.
Calibration
FLUXUS is a very reliable instrument. It is manufactured under strict quality control, using modern
production techniques. If installed as recommended in an appropriate location, used cautiously and
taken care of conscientiously, no troubles should appear. The instrument has been calibrated at
the factory and usually, a re-calibration of the flowmeter won't be necessary.
However, a new calibration might be advisable if
• the contact surface of the transducers show visible wear
• or if the transducer were used for a prolonged period at a high temperature (many months at a
temperature of more than 130°C for normal transducers or of more than 200°C for high
temperature transducers).
In this case, the instrument will have to be sent to VEGA for calibration under reference
conditions.
• Measure the temperature of the pipe at the measuring point and make sure that the transducer
used are adequate for this temperature.
Note: If the temperature at the measuring point is fluctuating, it is very important that the two inner
hooks of the clasp are engaged in the tension strap. Otherwise, the pressure on the transducer will
be insufficient when the temperature goes down. In case of strong temperature fluctuations, it is
recommended to work with the special VEGA tensions straps with integrated spring which will
compensate the diameter fluctuation caused by thermal expansion.
• Make sure that the pipe diameter is in the measuring range of the transducers.
A Specifications
Specifications are subject to modifications without prior notice.
Data logger
Loggable values: all measuring quantities and
totalized values
Capacity: >100,000
Units of Measurement
Volume flow Flow velocity Mass flow Totalizers Sound
velocity
Volume Mass
m3/h m/s g/s m3 g m/s
m3/min inch/s t/h l kg
m3/s kg/h gal** t
l/h kg/min
l/min kg/s*
l/s
USgph
USgpm
USgps
bbl/d
bbl/h
bbl/m
Flow Nomogram
l/s m3/ h l / min
5
10
Volume flow rate
4
10
10
4
10
00
10
5
DN DN DN DN 10
0 00 00 00
3 8
10
40 5 6
3
10
4
10
DN
0
30
2
10
DN
0
25
DN
0
20
2
10
DN
3
0
15
10
DN
1
10
10
DN
80
DN
1
65
10 2
DN
10
50
DN
1
30
DN
0.5
1
10
>
-1
10 0.5 1 2 3 5 10
Flow velocity (m/s)
UMADM6725V2-2EN, 03.04.2003
c-Material Damping Output range
Liner Store Meas. Data No/Yes Output MIN
Liner material Serial Output No/Yes Output MAX Dialogs/Menus
c-Material Storage Rate Error-value Pipe Circumfer. On/Off
B Overview of the Firmware
137
Overview of the Firmware
C Reference
The content of the tables has been compiled to help the user. The accuracy of the given data depends
on the composition, the temperature and the manufacturing process of the respective material. VEGA
does not accept liability for possible inaccuracies.
0 1 999.8 4.218
10 1 999.7 4.192
20 1 998.3 4.182
30 1 995.7 4.178
40 1 992.3 4.178
50 1 988.0 4.181
60 1 983.2 4.184
70 1 977.7 4.190
80 1 971.6 4.196
90 1 965.2 4.205
100 1.013 958.1 4.216
120 1.985 942.9 4.245
140 3.614 925.8 4.285
160 6.181 907.3 4.339
180 10.027 886.9 4.408
200 15.55 864.7 4.497
220 23.20 840.3 4.613
240 33.48 813.6 4.769
260 46.94 784.0 4.983
280 64.20 750.5 5.290
300 85.93 712.2 5.762
320 112.89 666.9 6.565
340 146.05 610.2 8.233
360 186.75 527.5 14.58
374.15 221.20 315.5 ∞
T Temperature
p Pressure
ρ Density
cp Specific heat at constant pressure