Flexim FLUXUS F401 User Manual

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Ultrasonic Flowmeter

FLUXUS F401

for Water

User Manual

UMFLUXUS_F4V1-3EN

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FLUXUS is a registered trademark of FLEXIM GmbH.

FLEXIM GmbH

Wolfener Straße 36

12681 Berlin

Germany

Tel.: +49 (30) 936 67 660

Fax: +49 (30) 936 67 680

Email: [email protected]

www.flexim.com

User manual for

FLUXUS F401

UMFLUXUS_F4V1-3EN, 2017-07-17

Firmware version: 6.28

Subject to change without notification.

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FLUXUS F401

Die Sprache, in der die Anzeigen auf dem Messumformer erscheinen, kann eingestellt werden (siehe Abschnitt 9.6).

The transmitter can be operated in the language of your choice (see section 9.6).

Il est possible de sélectionner la langue utilisée par le transmetteur à l'écran (voir section 9.6).

El caudalímetro puede ser manejado en el idioma de su elección (ver sección 9.6).

De transmitter kan worden gebruikt in de taal van uw keuze (zie gedeelte 9.6).

Имеется возможность выбора языка информации, отображаемой на экране преобразователя (смотри подраздел 9.6).

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FLUXUS F401

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Table of Contents FLUXUS F401

Table of Contents

1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.1 Regarding this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.3 Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 General Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3 Not Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.4 Safety Instructions for the User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Safety Instructions for the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.6 Safety Instructions for Electrical Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.7 Safety Instructions for Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.8 Recommended Procedure in Hazardous Situations . . . . . . . . . . . . . . . . . . . . . 14

3Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1 First Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.4 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 General Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1 Measurement System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.2 Measurement Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.3 Measurement Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5 Description of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2 Status Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.3 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6 Selection of the Measuring Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1 Acoustic Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 Undisturbed Flow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.3 Selection of the Measurement Arrangement Taking into Account 

the Measuring Range and the Measuring Conditions . . . . . . . . . . . . . . . . . . . . 29

6.4 Selection of the Sound Beam Plane near an Elbow . . . . . . . . . . . . . . . . . . . . . 30

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FLUXUS F401 Table of Contents

7 Installation of FLUXUS F401 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.2 Connections of the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.3 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.4 Connection of the Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.5 Connection of the Serial Interface RS232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.6 Connection of the Serial Interface RS485 (optional) . . . . . . . . . . . . . . . . . . . . . 36

8 Mounting of the Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.1 Preparation of the Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8.2 Orientation of the Transducers and Transducer Distance . . . . . . . . . . . . . . . . . 37

8.3 Mounting of the Transducers with Transducer Clamping Fixture and Ladder . . . .

Chains38

8.4 Mounting of the Transducers with Transducer Shoe and Ball Chains . . . . . . . . 39

8.5 Mounting of the Transducers with Transducer Shoes and Ladder Chains . . . . . 40

9 Start-Up of the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.1 Start-up settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

9.2 Switching On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.3 Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.5 HotCodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.6 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

10 Basic Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10.1 Input of the Pipe Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

10.2 Input of the Fluid Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

10.3 Selection of the Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

10.4 Input of the Measuring Point Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.5 Defining the Number of Sound Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.6 Transducer Distance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.7 Start of the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.8 Detection of the Flow Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

10.9 Stopping the Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

11 Displaying the Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

11.1 Selection of the Physical Quantity and of the Unit of Measurement. . . . . . . . . . 54

11.2 Adjustment of the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

11.3 Status Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

11.4 Transducer Distance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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12 Advanced Measuring Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

12.1 Command Execution during Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

12.2 Damping Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

12.3 Totalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

12.4 Upper Limit of the Flow Velocity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

12.5 Cut-Off Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

12.6 Uncorrected Flow Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

12.7 Program Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

12.8 Diagnosis with by means of the Snap Function . . . . . . . . . . . . . . . . . . . . . . . . . 65

13 Data Logger and Transmission of Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

13.1 Data Logger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

13.2 Transmission of Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

14 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

14.1 Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

14.2 Dialogs and Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

14.3 Measurement Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

14.4 Setting the Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

14.5 Instrument Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

15 SuperUser-Modus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

15.1 Activation/Deactivation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

15.2 Defining Flow Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

15.3 Limit of the Signal Amplification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

15.4 Upper Limit of the Sound Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

15.5 Detection of Long Measurement Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

15.6 Number of Decimal Places of the Totalizers . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

15.7 Manual Reset of the Totalizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

15.8 Display of the Sum of the Totalizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

15.9 Display of the Last Valid Measured Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

15.10 Display During the Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

16 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

16.1 Installation of an Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

16.2 Error Value Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

16.3 Activation of an Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

16.4 Activation of a Binary Output as a Pulse Output . . . . . . . . . . . . . . . . . . . . . . . . 99

16.5 Activation of a Binary Output as an Alarm Output . . . . . . . . . . . . . . . . . . . . . . . 99

16.6 Behavior of the Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

16.7 Deactivation of the Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

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FLUXUS F401 Table of Contents

17 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

17.1 Problems with the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

17.2 Selection of the Measuring Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

17.3 Maximum Acoustic Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

17.4 Application Specific Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

17.5 Large Deviations of the Measured Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

17.6 Problems with the Totalizers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

17.7 Transmission of Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Annex

A Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

B Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

C Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

D Conformity Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

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1 Introduction FLUXUS F401

1 Introduction

1.1 Regarding this Manual

This user manual has been written for the users operating the ultrasonic flowmeter FLUXUS. It contains important information about the measuring instrument, how to handle it correctly, and how to avoid damages.

Read the safety Instructions carefully. Make sure you have read and understood this user manual before using the measuring instrument.

Note! For technical data see Technical specification.

All reasonable effort has been made to ensure the correctness of the content of this user manual. However, If you find any erroneous information, please inform us. We will be grateful for any suggestions and comments regarding the concept and your experience working with the measuring instrument.

This will ensure that we can further develop our products for the benefit of our customers and in the interest of technological progress. If you have any suggestions about improving the documentation and particularly this user manual, please let us know so that we can consider your comments for future reprints.

1.2 Safety Instructions

The user manual contains instructions that are marked as follows:

Note! This text contains important information about the use of the flow-

meter.

Attention! This text contains important instructions which should be observed

to avoid damage or destruction of the measuring instrument. Proceed with special caution!

Observe these safety instruction!

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FLUXUS F401 1 Introduction

1.3 Warranty

We warrant the reliability of the material and workmanship of FLUXUS for the term specified in the sales contract, provided the measuring instrument is used for the purpose for which it was designed, and operated according to the instructions given in this user manual. Improper use of the FLUXUS leads to the withdrawal of any warranties of any kind, explicit or implicit.

Incorrect use includes:

• replacement of a component of FLUXUS with a component that was not approved by

FLEXIM

• unsuitable or insufficient maintenance

• repair of FLUXUS by unauthorized personnel

FLEXIM assumes no responsibility for injuries to the customer or third persons directly caused by material failure due to unpredictable defects in the product or for any indirect damages.

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.

If any problem appears which cannot be solved with the help of this user manual (see chapter 17), contact our sales office and give a precise description of the problem. Specify the type, serial number and firmware version of the measuring instrument.

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2 Safety Instructions FLUXUS F401

2 Safety Instructions

2.1 General Safety Instructions

Prior to any work, read the user manual carefully and in full.

Failure to comply with the instructions, in particular with the safety instructions, poses a risk to health and can lead to material damages. For further information, contact FLEXIM.

During installation and operation of the measuring equipment, observe the ambient and installation conditions specified in the documentation.

The measuring equipment has to be checked for proper condition and operational safety before each use.The measuring equipment has to be checked for proper condition and operational safety before each use. If disturbances or damages have occurred during installation or operation of the measuring equipment, please inform FLEXIM.

It is not allowed to make unauthorized modifications or alterations to the measuring equipment.

The personnel has to be suitably trained and experienced for the work.

2.2 Intended Use

The measuring equipment is intended for the measurement of fluid properties in closed pipes. By means of connected transducers, the transit times of the ultrasonic signals in the fluid and the pipe as well as other related properties, such as temperature and pressure, are measured and evaluated.

The transmitter uses these values to calculate the sought quantities, e.g., volumetric flow rate, mass flow rate, heat quantity, density and concentration. Through comparison with the values stored in the transmitter further physical quantities can be determined. The physical quantities are provided via configurable outputs and the display.

• All instructions of this user manual have to be observed to ensure intended use.

• Any use beyond or other than the intended use is not covered by warranty and can present a danger. Any damage arising from not intended use shall be solely the liability of the operator or user.

• The measurement is carried out without direct contact to the fluid in the pipe. The flow profile is not influenced.

• The transducers are fixed to the pipe using the supplied transducer mounting fixture.

• Observe the operating conditions, e.g., environment, voltage ranges. For the technical data of the transmitter, transducers and accessories, see Technical specification.

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FLUXUS F401 2 Safety Instructions

2.3 Not Intended Use

Not intended use in terms of a misuse means:

• any work on the measuring equipment without observing all instructions in this user manual

• use of transmitter, transducer and accessories combinations not intended by FLEXIM

• use in explosive atmospheres (the transmitter is not certificated for these atmospheres and should not be used there)

• any work on the measuring equipment (e.g., installation, dismounting, connection, startup, operation, service and maintenance) carried out by unauthorized and untrained personnel

• storage, installation and operation of the measuring equipment outside the specified ambient conditions, see section 7.3.2 and Technical specification

2.4 Safety Instructions for the User

Any work on the transmitter has to be carried out by authorized and qualified personnel. Observe the safety instructions in the user manual. For the technical data of the transmitter, transducers and accessories, see Technical specification.

• Observe the safety and accident prevention regulations applicable on the site of operation.

• Only use the supplied mounting fixtures and transducers as well as the intended accessories.

• Always wear the required personal protective equipment.

2.5 Safety Instructions for the Operator

• The operator shall qualify the personnel to perform their assigned tasks. They shall provide the required personal protective equipment and oblige the personnel to wear it. It is recommended to risk assess the workplace.

• Besides the safety instructions in this user manual, the health, safety and environment regulations applicable for the range of application of the transmitter, transducers and accessories have to be observed.

• With the exceptions stated in chapter 17, the measuring equipment is maintenancefree. Any components and spare parts may only be replaced by FLEXIM. The operator shall carry out periodic checks for changes or damages that can present a danger. For further information, contact FLEXIM.

• Observe the specifications for the installation and connection of the transmitter, transducers and accessories (see chapter 7 and chapter 8).

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2 Safety Instructions FLUXUS F401

2.6 Safety Instructions for Electrical Work

• Electrical work may only be carried out if there is enough space.

• The degree of protection of the transmitter is only ensured if the cables are firmly connected to the transmitter and all unused connections are covered.

• The condition and tight fit of the electrical connections have to be checked at regular intervals.

• The power supply unit for charging the battery, may only be connected to networks up to overvoltage category II. Use only the supplied power supply unit. For the power supply via power cable and power adapter, observe the safety instructions in section 7.3.1.

• The transmitter and the power supply unit must not be disassembled, see Fig. 2.1. The transmitter does not contain any components to be maintained by the user. For repair and service work, please contact FLEXIM.

• Observe the safety and accident prevention regulations for electrical systems and equipment.

Fig. 2.1: Transmitter FLUXUS F401

UMFLUXUS_F4V1-3EN, 2017-07-17 13

Page 14

FLUXUS F401 2 Safety Instructions

2.7 Safety Instructions for Transport

• If you detect a transport damage when unpacking the delivery, please contact the supplier or FLEXIM immediately.

• The transmitter is a sensitive electronic measuring instrument. Avoid shocks or impacts.

• Handle the transducer cable with care. Avoid sharp bends or kinks. Observe the ambient conditions.

• Select a solid surface to put the transmitter, transducers and accessories on.

• The transmitter, transducers and accessories have to be properly packed for transport:

– Use, if possible, the original packaging by FLEXIM or an equivalent cardboard box.

– Position the transmitter, transducers and accessories in the middle of the cardboard

box.

– Fill any voids with appropriate packaging material (e.g., paper, foam, bubble wrap).

– Protect the cardboard box against humidity.

2.8 Recommended Procedure in Hazardous Situations

Fire Fighting Measures

• If possible, disconnect the transmitter from the power supply.

• Prior to extinguishing, protect any electrical parts that are not affected by the fire (e.g., using a cover).

• Select a suitable extinguishing agent. Avoid, if possible, conductive extinguishing agents.

14 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 15

3 Handling FLUXUS F401

3Handling

3.1 First Inspection

The measuring instrument has already been tested thoroughly at the factory. At delivery, proceed to a visual control to make sure that no damage has occurred during transportation.

Make sure that the specifications of the delivered measuring instrument correspond to the specifications given on the purchase order.

The type and the serial number of the transmitter are shown on the nameplate. The transducer type is printed on the transducers.

3.2 General Precautions

FLUXUS is a precision measuring instrument and has to be handled with care. In order to obtain good measurement results and not damage the measuring instrument, it is important to pay special attention to the instructions given in this user manual, particularly to the following points:

• Protect the transmitter from shocks.

• Keep the transducers clean. Handle the cables with care. Avoid excessive cable bend.

• Make sure to work under correct ambient and operating temperatures. The ambient temperature at the measuring point has to be within the operating temperature range of the transmitter and the transducers (see Technical specification).

• Observe the degree of protection (see Technical specification).

3.3 Cleaning

• Clean the transmitter with a soft cloth. Do not use detergents.

• Remove traces of the coupling compound from the transducers with a soft paper towel.

3.4 Storage

• Wipe the transducers clean of traces of the coupling compound.

• After the measurement, always put the transmitter and its accessories into the corresponding backpack.

• Avoid excessive cable bends.

• Observe the notes on the storage of the battery (see Storage of the Battery in section

7.3.2).

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Page 16

FLUXUS F401 4 General Principles

transducers

transmitter

pipe

4 General Principles

For the ultrasonic measurement of the flow rate, the flow velocity of the fluid in a pipe is determined. Further physical quantities (e.g., volumetric flow rate, mass flow rate) are derived from the flow velocity and from additional physical quantities, if necessary.

4.1 Measurement System

The measurement system consists of a transmitter, the ultrasonic transducers with the transducer cables and the pipe on which the measurement is conducted.

The ultrasonic transducers are mounted on the outside of the pipe. Ultrasonic signals are sent through the fluid and received by the transducers. The transmitter controls the measuring cycle, eliminates the disturbance signals and analyzes the useful signals. The measured values can be displayed, used for calculations and transmitted.

Fig. 4.1: Example of a measurement setup

4.2 Measurement Principle

The flow velocity of the fluid is measured using the ultrasonic-transit time difference correlation principle (see section 4.2.2).

4.2.1 Terms

Flow profile

Distribution of the flow velocities over the cross-sectional pipe area. For an optimal measurement, the flow profile has to be fully developed and axisymmetrical. The shape of the flow profile depends on whether the flow is laminar or turbulent and is influenced by the conditions in the supply line of the measuring point (see chapter 6).

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Page 17

4 General Principles FLUXUS F401



sin

------------



sin

------------



sin

------------



sin

-----------

Reynolds number Re

Coefficient describing the turbulence behavior of a fluid in the pipe. The Reynolds number Re is calculated from the flow velocity, the kinematic viscosity of the fluid and the inner pipe diameter.

If the Reynolds number exceeds a critical value (usually approx. 2 300, if the fluid flows in a pipe), a transition from a laminar flow to a turbulent flow takes place.

Laminar flow

A flow without any turbulence. There is no disruption between the parallel flowing layers of the fluid.

Turbulent flow

A flow in which turbulence (swirling of the fluid) occurs. In technical applications, the flow in the pipe is mostly turbulent.

Transition range

The flow is partly laminar and partly turbulent.

Transit time difference ∆t

Difference of the transit times of the signals in and against the flow direction. The flow velocity of the fluid flowing in the pipe is determined from the transit time difference (see Fig. 4.2, Fig. 4.3, Fig. 4.4).

Sound speed c

Speed of the propagating sound. The sound speed depends on the mechanical properties of the fluid or the pipe material. In pipe materials and other solid materials, a distinction is made between the longitudinal and transversal sound speed. For the sound speed of some fluids and materials see annex C.

Flow velocity v

Average value of all flow velocities of the fluid over the cross-sectional pipe area.

Acoustic calibration factor k

ka =

The acoustic calibration factor k

is a parameter of the transducer which results from the

sound speed c within the transducer and the angle of incidence (see Fig. 4.2). According to Snell's law of refraction, the angle of propagation in the adjoining fluid or pipe material is:

= = =

UMFLUXUS_F4V1-3EN, 2017-07-17 17

Page 18

FLUXUS F401 4 General Principles

m·V·V

t

2t

-----------

Fluid mechanics correction factor k

With the fluid mechanics correction factor kRe, the measured value of the flow velocity in the area of the sound beam is converted into the value of the flow velocity across the whole cross-sectional pipe area. In case of a fully developed flow profile, the fluid mechanics correction factor only depends on the Reynolds number and the roughness of the inner pipe wall. The fluid mechanics correction factor is recalculated by the transmitter for each new measurement.

Volumetric flow rate

= v · A

The volume of the fluid that passes through the pipe per unit time. The volumetric flow rate is calculated from the product of the flow velocity v and the cross-sectional pipe area A.

Mass flow rate

= · ρ

The mass of the fluid that passes through the pipe per unit time. The mass flow rate is calculated from the product of the volumetric flow rate and the density ρ.

4.2.2 Measurement of the Flow Velocity

The signals are emitted and received by two transducers alternatively in and against the flow direction. If the fluid moves, the signals propagating in the fluid are displaced with the flow. This displacement causes a reduction in distance for the signal in the flow direction and an increase in distance for the signal against the flow direction in the section of the receiving transducer (see Fig. 4.2 and Fig. 4.3). This causes a change in the transit times. The transit time of the signal in the flow direction is shorter than the transit time against the flow direction. This transit time difference is proportional to the average flow velocity.

The average flow velocity of the fluid is calculated as follows:

. ka .

V = k

with

v – average flow velocity of the fluid

– fluid mechanics correction factor

ka– acoustic calibration factor

∆t – transit time difference

– transit time in the fluid

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Page 19

4 General Principles FLUXUS F401

transducer (emitter)

flow direction

of the fluid

sound path without flow

sound path with flow

pipe wall

transducer (receiver)

reduction in distance in the transducer

flow direction

of the fluid

sound path without flow

sound path with flow

increase in distance

in the transducer

pipe wall

transducer (receiver)

transducer (emitter)

∆t

signal in the

flow direction

signal against the flow direction

Fig. 4.2: Sound path of the signal in the flow direction.

UMFLUXUS_F4V1-3EN, 2017-07-17 19

Fig. 4.3: Sound path of the signal against the flow direction

Fig. 4.4: Signals and transit time difference ∆t

Page 20

FLUXUS F401 4 General Principles

transducer distance

4.3 Measurement Arrangements

4.3.1 Terms

Diagonal arrangement

The transducers are mounted on the opposite sides of the pipe (see Fig. 4.5).

Reflection arrangement

The transducers are mounted on the same side of the pipe (see Fig. 4.6).

Fig. 4.5: Diagonal arrangement Fig. 4.6: Reflection arrangement

Sound path

The distance covered by the ultrasonic signal after crossing the pipe once. The number of the sound paths is:

• odd if the measurement is conducted in the diagonal arrangement

• even if the measurement is conducted in the reflection arrangement

Transducer distance

Distance between the transducers. It is measured between the inner edges of the transducers.

reflection arrangement

diagonal arrangement (positive transducer distance)

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4 General Principles FLUXUS F401

transducer distance

2 sound paths in 1 plane

diagonal arrangement (negative transducer distance)

Sound beam plane

The plane containing one, two or more sound paths or beams (see Fig. 4.7).

Fig. 4.7: Sound paths and beams in one plane

4.3.2 Examples

Diagonal arrangement Reflection arrangement

1 transducer pair

1 sound path

UMFLUXUS_F4V1-3EN, 2017-07-17 21

1 transducer pair

2 sound paths

Page 22

FLUXUS F401 5 Description of the Transmitter

2 x16-digit LCD display, backlit

status indicator

"charge state"

RS232 interface

keyboard

status indicator

"power supply"

transducers

output power supply

5 Description of the Transmitter

5.1 Design

The command panel can be accessed by opening the cover.

Fig. 5.1: Command panel of the transmitter FLUXUS F401

22 UMFLUXUS_F4V1-3EN, 2017-07-17

Fig. 5.2: Connections of the transmitter FLUXUS F401

Page 23

5 Description of the Transmitter FLUXUS F401

5.2 Status Indication

The status indicators only light if the transmitter is switched on and the display light is activated.

Tab. 5.1: Status indicator "power supply"

LED flashes green transmitter is connected to the power supply; battery is charging

LED lights green transmitter is connected to the power supply, battery is charged

LED flashes red battery almost empty

Tab. 5.2: Status indicator "charge state" (red LEDs)

LEDs light number of LED lights displays the charge state of the battery

5.3 Keyboard

The keyboard consists of 5 keys.

Tab. 5.3: General functions

I/O switching the transmitter on/off

switching the display light on/off

switching off the transmitter by pressing key I/O for 3 seconds

ENTER confirmation of selection or entered value

BRK + C INIT: When switching on the transmitter press these two keys si-

multaneously to execute the initialization (see section 9.2).

BRK + C + ENTER RESET: Press these three keys simultaneously to correct a mal-

function. The reset has the same effect as restarting the transmitter. Stored data are not affected.

BRK interruption of the measurement and selection of the main menu

Be careful not to stop a current measurement by inadvertently pressing key BRK!

Tab. 5.4: Navigation

scroll to the right or up through a scroll list

scroll to the left or down through a scroll list

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Page 24

FLUXUS F401 5 Description of the Transmitter

Tab. 5.5: Input of digits

move the cursor to the right

scroll through the digits above the cursor

C Move the cursor to the left. If the cursor is on the left margin:

• an already edited value will be reset to the value which was stored previously

• an unedited value will be deleted.

If the entered value is not valid, an error message will be displayed. Press ENTER and enter a correct value.

Tab. 5.6: Input of text

move the cursor to the right

scroll through the characters above the cursor

C reset all characters to the last stored entry

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Page 25

6 Selection of the Measuring Point FLUXUS F401

6 Selection of the Measuring Point

The correct selection of the measuring point is crucial for achieving reliable measurement results and a high measurement accuracy.

A measurement on a pipe is possible if

• the ultrasound propagates with a sufficiently high amplitude (see section 6.1)

• the flow profile is fully developed (see section 6.2)

The correct selection of the measuring point and thus, the correct transducer positioning guarantees that the sound signal will be received under optimum conditions and evaluated correctly.

Due to the variety of applications and the different factors that influence the measurement, there is no standard solution for the transducer positioning. The correct position of the transducers is influenced by the following factors:

• diameter, material, lining, wall thickness and shape of the pipe

•fluid

• gas bubbles in the fluid

Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity of welds.

Avoid locations with deposit formation in the pipe.

The ambient temperature at the measuring point has to be within the operating temperature range of the transducers (see Technical specification).

Select the location of the transmitter within the range of the cable of the measuring point.

The ambient temperature at the location has to be within the operating temperature range of the transmitter (see Technical specification).

6.1 Acoustic Penetration

The pipe has to be acoustically penetratable at the measuring point. The acoustic penetration is reached when pipe and fluid do not attenuate the sound signal so strongly that it is completely absorbed before reaching the second transducer.

The attenuation in the pipe and in the fluid depends on:

• kinematic viscosity of the fluid

• proportion of gas bubbles and solids in the fluid

• deposits on the inner pipe wall

• pipe material

The following requirements have to be met at the measuring point:

• the pipe is always filled completely

• no material deposits in the pipe

• no bubble accumulation

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Page 26

FLUXUS F401 6 Selection of the Measuring Point

Note! Even bubble-free fluids can form gas pockets when the fluid ex-

pands, e.g., before pumps and after great cross-section extensions.

Observe the notes in the following table:

Tab. 6.1: Recommended transducer mounting position

Horizontal pipe

Select a measuring point where the transducers can be mounted on the side of the pipe, allowing the sound waves to propagate in the pipe horizontally. By doing this, the solid on the bottom of the pipe or gas bubbles in the pipe's upper part are prevented from influencing the propagation of the signal.

correct: disadvantageous:

Vertical pipe

Select the measuring point at a pipe location where the fluid flows upward. The pipe has to be completely filled.

correct: disadvantageous:

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Page 27

6 Selection of the Measuring Point FLUXUS F401

Tab. 6.1: Recommended transducer mounting position

Free inlet or outlet pipe section:

Select the measuring point at a pipe location where the pipe cannot run empty.

correct: disadvantageous:

6.2 Undisturbed Flow Profile

Some flow elements (elbows, slide valves, valves, control valves, pumps, reducers, diffusers, etc.) distort the flow profile in their vicinity. The axisymmetrical flow profile needed for correct measurement is no longer given. A careful selection of the measuring point helps to reduce the impact of disturbance sources.

It is most important that the measuring point is chosen at a sufficient distance from any disturbance sources. Only then it can be assumed that the flow profile in the pipe is fully developed. However, measuring results can be obtained even if the recommended distance to disturbance sources cannot be observed for practical reasons.

Recommended straight inlet and outlet pipe lengths for different types of flow disturbance sources are shown in the examples in Tab. 6.2.

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Page 28

FLUXUS F401 6 Selection of the Measuring Point

Tab. 6.2: Recommended distance from disturbance sources;

D – nominal pipe diameter at the measuring point, l – recommended distance between disturbance source and transducer position

disturbance source: 90° elbow

inlet: l ≥ 10 D outlet: l ≥ 5 D

disturbance source: 2 x 90° elbow on different levels

inlet: l ≥ 40 D outlet: l ≥ 5 D

disturbance source: valve

inlet: l ≥ 40 D outlet: l ≥ 5 D

disturbance source: reducer

inlet: l ≥ 10 D outlet: l ≥ 5 D

disturbance source: pump

inlet: l ≥ 20 D

28 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 29

6 Selection of the Measuring Point FLUXUS F401

6.3 Selection of the Measurement Arrangement Taking into Account the Measuring Range and the Measuring Conditions

Diagonal arrangement Reflection arrangement

• wider flow velocity and sound speed

range compared to the reflection arrangement

• use in the presence of deposits on the in-

ner pipe wall or with strongly attenuating gases or liquids (only 1 sound path)

• smaller flow velocity and sound speed range compared to the diagonal arrangement

• transverse flow effects are compensated for because the beam crosses the pipe in 2 directions

• higher accuracy of measurement because the accuracy increases with the number of sound paths

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Page 30

FLUXUS F401 6 Selection of the Measuring Point

elbow plane

flow direction

elbow plane

flow direction

6.4 Selection of the Sound Beam Plane near an Elbow

With vertical pipe orientation With horizontal pipe

• The sound beam plane (see section

4.3.1) has an angle of 90° to the elbow plane. The elbow is upstream of the measuring point.

With measurements in both directions

• The sound beam plane (see section

4.3.1) is selected according to the nearest elbow (horizontal or vertical, depending on the pipe orientation - see above).

• The sound beam plane (see section

4.3.1) has an angle of 90° ± 45° to the

elbow plane. The elbow is upstream of the measuring point.

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Page 31

7 Installation of FLUXUS F401 FLUXUS F401

power supply unit/ battery charging unit

transducers

outputs

7 Installation of FLUXUS F401

7.1 Location

• Select the measuring point according to the recommendations in chapter 4 and 6. The ambient temperature at the measuring point has to be within the operating temperature range of the transducers, see Technical specification.

• Select the location of the transmitter within the cable range of the measuring point. The ambient temperature at the measuring point has to be within the operating temperature range of the transmitter and the transducer, see Technical specification.

7.2 Connections of the Transmitter

The connections of the outputs, transducers and the power supply unit are located on the back side of the transmitter, see Fig. 7.1.

Fig. 7.1: Connections on the transmitter FLUXUS F401

7.2.1 Transducers

Connection

• Remove the protective cap from the transmitter.

• Remove the protective cap from the transducer by pulling the knurled ring slightly back.

• Insert the connector into the transmitter socket. The red point on the connector has to be aligned with the red marking on the socket.

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Page 32

FLUXUS F401 7 Installation of FLUXUS F401

knurled ring

marking on the connector

protective cap with marking

pulling direction

marking on the transmitter socket

pushing direction

sense of rotation

knurled ring

transmitter

remove

connect

Fig. 7.2: Transducer connector

Removal

• Pull the knurled ring slightly back and remove the connector from the transmitter socket.

• Put the protective cap on the connector. The red point on the connector has to be aligned with the red marking on the protective cap.

• Put the protective cap on the transmitter socket.

7.2.2 Output Adapter/Power Supply Unit

Connection

• Remove the protective cap on the transmitter by turning it to the left.

• Insert the connector into the transmitter socket.

• Turn the knurled ring to the right in order to fix the connector.

32 UMFLUXUS_F4V1-3DE, 2017-07-17

Fig. 7.3: Connector on the output adapter/power supply unit

Page 33

7 Installation of FLUXUS F401 FLUXUS F401

Removal

• Push the connector firmly against the transmitter. Turn the knurled ring to the right and remove the connector from the transmitter socket.

• Screw the protective cap on the socket. Turn protective cap to the right in order to fix it.

7.3 Power Supply

The transmitter can be operated with the power supply unit, see section 7.3.1 or the integrated battery, see section 7.3.2 or the power pack PP026NN, see QSPowerPack_PP026.

7.3.1 Operation with Power Supply Unit

Attention! • Use only the supplied power supply unit.

• The power supply is not protected against moisture. Use it only in dry rooms.

• The voltage indicated on the power supply unit must not be exceeded.

• Do not connect a defective power supply unit to the transmitter.

• Connect the power supply unit to the back side of the transmitter, see Fig. 7.1.

7.3.2 Operation with Battery

The transmitter has a Li-ion battery and can be operated independently. When delivered, the battery is charged approx. 30 %. The battery does not need to be fully charged before it is used for the first time.

If the LED of the status indicator "power supply" flashes red the battery is almost empty. The capacity is sufficient for storing of the current parameter record. A measurement is no longer possible.

Notice! It is recommended to discharge and subsequently recharge the bat-

teries completely for at least once a year.

Charging the Battery

Connect the power supply unit to the transmitter, see Fig. 7.1. Switch on the transmitter. The charging starts automatically. The green LED flashes. The max. charging time is approx. 8 h.

During the charging process, the ambient temperature should be in the range of

0...45 °C.

A measurement can be made during the charging. Charging will be stopped automatically when the battery is fully charged. The LED will light green.

Optionally, the transmitter can be charged with a car adapter via the 12 V connector.

Notice! The battery will only be charged if the transmitter is switched on.

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Page 34

FLUXUS F401 7 Installation of FLUXUS F401

ext

Storage of the Battery

The battery remains in the transmitter. After storage, the transmitter can immediately be operated with the battery.

• charge state: > 30 %

• storing temperature: 12...25 °C

7.4 Connection of the Outputs

For the connection of the outputs, see Fig. 7.1, Fig. 7.4, Tab. 7.1 and Tab. 7.2.

Tab. 7.1: Circuits of the outputs

output transmitter external circuit remark

internal circuit connection

active current output



Fig. 7.4 and Tab. 7.2



ext

< 500 Ω

binary output (optorelay)



Fig. 7.4 and Tab. 7.2

RS485 (optional)



A(+)

B(-)

shield

is the sum of all ohmic resistances in the circuit (e.g., resistance of the conductors,

ext

resistance of the amperemeter/voltmeter).

34 UMFLUXUS_F4V1-3DE, 2017-07-17



= 32 V

ext

≤ 200 mA



120 Ω

termination resistor

Page 35

7 Installation of FLUXUS F401 FLUXUS F401

binary output current output

Fig. 7.4: Terminal assignment for the connection of the outputs

Tab. 7.2: Terminal assignment for the connection of the outputs

terminal connection

A (+) binary output B1

B (-) binary output B1

C (+) current output I1

D (-) current output I1

Output Adapter (optional)

Fig. 7.5: Output adapter

7.5 Connection of the Serial Interface RS232

The RS232 interface is located on the front plate of the transmitter, see Fig. 5.1.

• Connect the RS232 cable to the transmitter and the serial interface of the PC. If the RS232 cable cannot be connected to the PC, use the RS232/USB adapter.

UMFLUXUS_F4V1-3DE, 2017-07-17 35

Page 36

FLUXUS F401 7 Installation of FLUXUS F401

B A

7.6 Connection of the Serial Interface RS485 (optional)

The RS485 interface is connected to the transmitter via the RS485 adapter, see Fig. 7.6.

Fig. 7.6: RS485 adapter

Tab. 7.3: Terminal assignment for the RS485 adapter

terminal connection

A+

B-

Sshield

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Page 37

8 Mounting of the Transducers FLUXUS F401

transducer distance

8 Mounting of the Transducers

• Before you start this chapter, carry out the instructions in chapter 10.

The transducers are fixed to the pipe by means of the supplied transducer mounting fixture.

8.1 Preparation of the Pipe

• The pipe has to be stable. It has to be able to withstand the pressure exerted by the transducer mounting fixture.

Rust, paint or other deposits on the pipe absorb the sound signal. A good acoustic contact between the pipe and the trans-ducers is obtained as follows:

• Clean the pipe at the selected measuring point: – If present, the paint layer has to be smoothed by sanding. The paint does not need to

be removed completely.

– Remove any rust or loose paint.

• Use coupling foil or apply a bead of acoustic coupling compound along the center line of the contact surface of the transducers.

• Observe that there must be no air pockets between the transducer contact surface and the pipe wall.

• Make sure that the transducer mounting fixture applies the necessary pressure on the transducers.

8.2 Orientation of the Transducers and Transducer Distance

Mount the transducers onto the pipe in such way that the engravings on the transducers form an arrow (see Fig. 8.1). The transducer cables show in opposite directions.

The transducer distance is the distance between the inner edges of the transducers (see section 4.3 and Fig. 8.1).

For the determination of the flow direction with the help of the arrow see section 10.6.

Fig. 8.1: Correct positioning of the transducers

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Page 38

FLUXUS F401 8 Mounting of the Transducers

transducer clamping fixture tensioning screw

ladder chain

hook

transducer clamping fixture

hook

8.3 Mounting of the Transducers with Transducer Clamping Fixture and Ladder Chains

• Insert the transducer into the transducer clamping fixture until it snaps.

• Fix the chain to the hook of the transducer clamping fixture.

• Place the transducer clamping fixture onto the pipe.

• Place the chain around the pipe and fix it into the hook on the opposite side of the trans-

ducer clamping fixture.

• Tighten the tensioning screw of the transducer clamping fixture in order to fix the trans-

ducer on the pipe.

• Fix the second transducer in the same way.

Fig. 8.2: Mounting the transducers with transducer clamping fixture and ladder chain

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8 Mounting of the Transducers FLUXUS F401

transducer shoe screw

ball chain

8.4 Mounting of the Transducers with Transducer Shoe and Ball Chains

• Insert the transducer into the transducer shoe. Turn the screw on the upper side of the

transducer shoe by 90° in order to engage and lock its extremity in the groove on top of the inserted transducer.

• Place the transducer shoe to the pipe at the measuring point. Insert the last ball of the

chain into the slot on the upper side of the transducer shoe.

• Place the chain around the pipe.

• Tighten the chain and insert it into the other slot of the transducer shoe. Proceed in the

same way with the second transducer.

The material thickness (2 mm) of the transducer shoes has to be added.

Note! transducer distance = 

Extension of the ball chain

To extend the chain, insert the last ball of the extension into the fastening clip of the ball chain. The spare fastening clips supplied with the chain can be used to repair a broken chain.

UMFLUXUS_F4V1-3EN, 2017-07-17 39

Fig. 8.1: Transducer shoes and ball chains

distance between transducer shoes (x) + 4 mm

Page 40

FLUXUS F401 8 Mounting of the Transducers

transducer shoe

transducer distance

ladder chain

screw

hook

ruler knurled nut

8.5 Mounting of the Transducers with Transducer Shoes and Ladder Chains

• Adjust the transducer distance on the ruler before installation of the transducer shoes.

• Place the transducer shoes on the pipe at the measuring point.

• Loosen the knurled screw.

• Place the chain around the pipe.

• Tighten the chain and insert it into the hook of the transducer shoe.

• Tension the chain by tightening the knurled screw.

• Fix the second transducer shoe in the same way.

• Insert the transducer into the transducer shoe.

• Tighten the screw on the upper side of the transducer shoe in order to fix the transducer

on the pipe.

• Fix the second transducer in the same way.

• The transducer distance is read from the ruler.

Fig. 8.3: Mounting of the transducers with transducer shoes and ladder chains

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Page 41

9 Start-Up of the Transmitter FLUXUS F401

Select language | Englisch

Engineer. Units >METRIC< imperial

CANADA-REGION ? >NO< yes

TIME 11:00 ok >NEW<

TIME 11:00 Set Time !

TIME 11:11 >OK< new

DATE 25.01.2011 ok >NEW<

DATE 25.01.2011 Set Date !

DATE 26.01.2016 >OK< new

9 Start-Up of the Transmitter

9.1 Start-up settings

When starting up the transmitter for the first time, the following settings are required:

• language

• units of measurement

• time/date

These displays will only be indicated once when the transmitter is switched on for the first time.

The available languages of the transmitter are displayed in the relevant language. Select a language. Press ENTER.

The menus are displayed in the selected language.

Select the units of measurement to be used. Press ENTER.

Select whether the transmitter is used in the region of Canada or not. Press ENTER.

This display will only be indicated if IMPERIAL has been selected.

The current time is displayed. Select ok to confirm the time or new to set it. Press ENTER.

UMFLUXUS_F4V1-3EN, 2017-07-17 41

Select the character to be edited with key .

Edit the selected character with key and C. Press ENTER.

The new time is displayed. Select ok to confirm the time or new to reset it. Press ENTER.

The current date is displayed. Select ok to confirm the date or new to set it. Press ENTER.

Select the character to be edited with key .

Edit the selected character with key and C. Press ENTER.

The new date is displayed. Select ok to confirm the date or new to reset it. Press ENTER.

Page 42

FLUXUS F401 9 Start-Up of the Transmitter

FLEXIM FLUXUS F401 -XXXXXXX

>PAR< mea opt sf Parameter

INITIALISATION

----DONE----

FACTORY DEFAULT? no >YES<

Delete Meas.Val. no >YES<

9.2 Switching On

Press key I/O to switch on the transmitter.

As soon as the transmitter is switched on, the serial number of the transmitter is displayed for a short time.

Data cannot be entered while the serial number is displayed.

Afterwards, the main menu is displayed in the default language. The language of the display can be set (see section 9.6).

9.3 Initialization

During an initialization (INIT) of the transmitter, the settings in the program branches

Parameter and Output Options and some of the settings in the program branch Special Funct. are reset to the default settings of the manufacturer. For INIT-resis-

tant settings, see annex A.

Proceed as follows to execute an initialization:

• While switching on the transmitter: keep keys BRK and C pressed.

• During the operation of the transmitter: press keys BRK, C and ENTER at the same

time. A RESET is executed. Release only key ENTER. Keep keys BRK and C pressed.

After the initialization has been executed, the message INITIALISATION DONE is displayed.

After the initialization, the remaining settings of the transmitter can be reset to the default settings and/or the stored measured values can be deleted.

Select yes to reset the remaining settings to the default settings or no to keep them at the current settings.

Press ENTER.

If yes is selected, the message FACTORY DEFAULT DONE will be displayed.

Select yes to delete the stored measured values or no to keep them stored.

Press ENTER.

This display will only be indicated if measured values are stored in the data logger.

42 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 43

9 Start-Up of the Transmitter FLUXUS F401

>PAR< mea opt sf Parameter

9.4 Display

9.4.1 Main Menu

The main menu contains the following program branches:

• par (Parameter)

• mea (Measuring)

• opt (Output Options)

• sf (Special Functions)

The selected program branch is displayed in capital letters between arrows. The complete designation of the selected program branch is displayed in the lower line.

Select a program branch with key and . Press ENTER.

Note! By pressing key BRK, the measurement is stopped and the main

menu is selected.

Note! In this user manual, all program entries and keys are indicated with

typewriter characters (Parameter). The menu items are separated from the main menu by a backslash "\".

9.4.2 Program branches

• Program branch Parameter

input of the pipe and fluid parameters

• Program branch Measuring

processing of the steps for the measurement

• Program branch Output Options

setting of the physical quantity, the unit of measurement and the parameters for the transmission of measured value

• Program branch Special Funct.

contains all functions that are not directly related to the measurement

UMFLUXUS_F4V1-3EN, 2017-07-17 43

Page 44

FLUXUS F401 9 Start-Up of the Transmitter

Parameter

>PAR<

↓

pipe parameters

↓

medium

parameters

↓

transducer type

Measuring

>MEA<

↓

measuring

point number

↓

sound path

↓

transducer positioning

↓

measurement

↓

consistency check

Output Options

>OPT<

↓

physical quantity

↓

unit of

measurement

↓

damping

↓

measured value

output

Special Funct.

>SF<

↓

system settings

↓

instrument

information

↓

print measured

values

↓

delete measured

values

↓

program code

For an overview of the program branches see figure below. For a detailed overview of the menu structure see annex A.

SYSTEM settings contains the following menu items:

• set clock

• dialogs and menus

• measurement

• outputs

•storing

• signal snap

• serial transmission

• miscellaneous

44 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 45

9 Start-Up of the Transmitter FLUXUS F401

Volume in: ↕ m3/h

Lining no >YES<

R1=FUNC<typ mode Function: MAX

9.4.3 Navigation

If a vertical arrow ↕ is displayed, the menu item contains a scroll list. The current list item is displayed in the lower line.

Press key and to scroll and select a list item in the lower line. Press ENTER.

Some menu items contain a horizontal scroll list in the lower line. The selected list item is displayed in angle brackets and capital letters.

Press key and to scroll and select a list item in the lower line. Press ENTER.

Some menu items contain a horizontal scroll list in the upper line. The selected list item is displayed in capital letters and in angle brackets. The current value of the list item is displayed in the lower line.

Press key to scroll and select a list item in the upper line.

Press key to scroll and select a value for the selected list item in the lower line.

Press ENTER.

9.5 HotCodes

A HotCode is a digit sequence that activates certain functions and settings:

function HotCode see section deactivation

language selection 9090xx 9.6

activation of the SuperUser mode 071049 15.1 HotCode 071049

change of the transmission parameters of the RS232 interface

resetting the contrast of the  display to medium

UMFLUXUS_F4V1-3EN, 2017-07-17 45

232-0- 13.2.4

555000 14.4

Page 46

FLUXUS F401 9 Start-Up of the Transmitter

SYSTEM settings↕ Miscellaneous

Input a HOTCODE no >YES<

Please input a HOTCODE: 000000

INVALID HOTCODE HOTCODE: 000000

Select Special Funct.\SYSTEM settings\Miscellaneous.

Select yes to enter a HotCode.

Enter the HotCode. Press ENTER.

An error message will be displayed if an invalid HotCode has been entered.

Press ENTER.

9.6 Language Selection

The transmitter can be operated in the languages listed below. The language can be selected with the following HotCodes:

Tab. 9.1: Language HotCodes

909031 Dutch

909033 French

909034 Spanish

909044 English

909049 German

Depending on the technical data of the transmitter, some of the languages might not be implemented.

When the last digit has been entered, the main menu is displayed in the selected language.

The selected language remains activated when the transmitter is switched off and on again. After an initialization of the transmitter, the language is reset to the default language.

46 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 47

10 Basic Measurement FLUXUS F401

>PAR<mes opt sf Parameter

Outer Diameter

100.0 mm

Outer Diameter

1100.0 MAXIMAL

Wall Thickness

3.0 mm

10 Basic Measurement

The pipe and fluid parameters are entered for the selected measuring point (see chapter

6). The parameter ranges are limited by the technical characteristics of the transducers and the of transmitter.

Note! The parameters will only be stored when the program branch

Parameter has been edited in its entirety.

10.1 Input of the Pipe Parameters

Select the program branch Parameter. Press ENTER.

10.1.1 Outer Pipe Diameter/Pipe Circumference

Enter the outer pipe diameter. Press ENTER.

An error message will be displayed if the entered parameter is not within the range. The limit is displayed.

example: upper limit 1100 mm for the connected transducers and for a pipe wall thickness of 50 mm

It is possible to enter the pipe circumference instead of the outer pipe diameter (see section 14.2.1).

If the input of the pipe circumference is activated and 0 (zero) is entered in Outer Di- ameter, the menu item Pipe Circumfer. will be displayed. If the pipe circumference is not to be entered, press key BRK to return to the main menu and start the parameter input again.

10.1.2 Pipe Wall Thickness

Note! The inner pipe diameter (= outer pipe diameter - 2 × pipe wall thick-

UMFLUXUS_F4V1-3EN, 2017-07-17 47

Enter the pipe wall thickness. Press ENTER.

ness) is calculated internally. If the value is not within the inner pipe diameter range of the connected transducers, an error message will be displayed.

Page 48

FLUXUS F401 10 Basic Measurement

Pipe Material ↕ Carbon Steel

c-Material

3230.0 m/s

Lining no >YES<

Lining ↕ Bitumen

c-Material

3200.0 m/s

Liner Thickness

3.0 mm

10.1.3 Pipe Material

The pipe material has to be selected to be able to determine the sound speed. The sound speed for the materials in the scroll list are stored in the transmitter.

Select the pipe material.

If the material is not in the scroll list, select Other Mate- rial. Press ENTER.

When the pipe material has been selected, the corresponding sound speed is set automatically. If Other Material is selected, the sound speed has to be entered.

Enter the sound speed of the pipe material. Press ENTER.

Note! Enter the sound speed of the material (i.e. longitudinal or transver-

sal speed) which is nearer to 2500 m/s.

For the sound speed of some materials see annex C.1.

10.1.4 Pipe Lining

If the pipe has an inner lining, select yes. Press ENTER.

If no is selected, the next parameter will be displayed (see section 10.1.5).

Select the lining material.

If the material is not in the scroll list, select Other Mate- rial. Press ENTER.

If Other Material is selected, the sound speed has to be entered.

Enter the sound speed of the lining material. Press ENTER.

For the sound speed of some materials see annex C.1.

Enter the thickness of the liner. Press ENTER.

Note! The inner pipe diameter (= outer pipe diameter - 2 × pipe wall thick-

ness - 2 × liner thickness) is calculated internally. If the value is not within the inner pipe diameter range of the connected transducers, an error message will be displayed.

48 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 49

10 Basic Measurement FLUXUS F401

Roughness

0.4 mm

Medium Temperat.

20.0 C

Transducer Type↕ Standard

Transducer ↕ CLAMPON 2MHz

10.1.5 Pipe Roughness

The flow profile of the fluid is influenced by the roughness of the inner pipe wall. The roughness is used for the calculation of the profile correction factor. As, in most cases, the pipe roughness cannot be determined exactly, it has to be estimated.

For the roughness of some materials see annex C.2.

Enter the roughness of the selected pipe or liner material.

Change the value according to the condition of the inner pipe wall. Press ENTER.

10.2 Input of the Fluid Parameters

10.2.1 Fluid Temperature

The fluid temperature is used for the interpolation of the sound speed and therefore for the calculation of the recommended transducer distance at the beginning of the measurement.

During the measurement, the fluid temperature is used for the interpolation of the density and viscosity of the fluid.

Enter the fluid temperature. The value has to be within the operating temperature range of the transducers. Press ENTER.

10.3 Selection of the Transducer

The transducer type has to be selected.

UMFLUXUS_F4V1-3EN, 2017-07-17 49

Select Standard.

Press ENTER.

Select the transducer frequency of the used transducer (see nameplate).

Press ENTER.

Page 50

FLUXUS F401 10 Basic Measurement

par >MEA< opt sf Measuring

par >MEA< opt sf NO DATA!

Meas.Point No.: xxx (↑↓← →)

A: 

2 NUM

Sound Path

2 NUM

Transd. Distance

53.9 mm Reflec

10.4 Input of the Measuring Point Number

Select the program branch Measuring. Press ENTER.

If this error message is displayed, the parameters are not complete. Enter the missing parameters in the program branch Parameter.

If the data logger or the serial interface is activated, the measuring point number has to be entered:

Enter the measuring point number. Press ENTER.

If arrows are displayed in the lower line on the right, ASCII text can be entered. If no arrows are displayed, only digits, point and hyphen can be entered.

10.5 Defining the Number of Sound Paths

A value for the number of sound paths corresponding to the connected transducers and the entered parameters is recommended. Change the value, if necessary. Press ENTER.

For the definition of the sound paths see section 4.3.

10.6 Transducer Distance

A value for the transducer distance is recommended. Fix the transducers (see chapter 8).

Press ENTER.

Reflec - reflection arrangement Diagon - diagonal arrangement

The transducer distance is the distance between the inner edges of the transducers (see section 4.3).

In case of a measurement in diagonal mode on very small pipes, a negative transducer distance is possible.

Note! The accuracy of the recommended transducer distance depends on

the accuracy of the entered pipe and fluid parameters.

10 Basic Measurement

50 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 51

10 Basic Measurement FLUXUS F401

Transd. Distance

53.9 mm !

S=■ ■ ■ ■ ■ ■

■ < >■ =53.9 mm!

S=■ ■ ■ ■ ■ ■  Q=■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■

time= 94.0 μs Q=■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■

Transd. Distance?

54 mm

L=(50.0) 54.0 mm

54.5 m3/h

10.6.1 Fine Adjustment of the Transducer Distance

If the displayed transducer distance is adjusted, press ENTER.

The measuring for the positioning of the transducers is started.

The amplitude of the received signal is displayed by the bar graph S=.

• Shift a transducer slightly within the range of the recommended transducer distance,

The following quantities can be displayed in the upper line by pressing key and in the lower line by pressing key

• ■ <>■ =: transducer distance

• time: transit time of the measuring signal in μs

• S=: signal amplitude

• Q=: signal quality, bar graph has to have max. length

If the signal is not sufficient for measurement, Q= UNDEF will be displayed.

In case of large deviations, check if the entered parameters are correct or repeat the measurement at a different point on the pipe.

10.6.2 Consistency Check

A consistency check during the measurement is recommended.

The transducer distance can be displayed during the measurement by scrolling key .

UMFLUXUS_F4V1-3EN, 2017-07-17 51

After the precise positioning of the transducers, the recommended transducer distance is displayed again.

Enter the actual (precise) transducer distance. Press ENTER.

The optimum transducer distance is displayed in brackets (here: 50.0 mm) in the upper line, followed by the entered transducer distance (here: 54.0 mm). The latter value has to correspond to the adjusted transducer distance. Press ENTER to optimize the transducer distance.

Page 52

FLUXUS F401 10 Basic Measurement

Transd. Distance?

50.0 mm

L=(51.1) 50.0 mm

54.5 m3/h

The optimum transducer distance is calculated on the basis of the measured sound speed. It is therefore a better approximation than the first recommended value which had been calculated on the basis of the sound speed range entered in the program branch Parameter.

If the difference between the optimum and the entered transducer distance is less than specified in Tab. 10.1, the measurement is consistent and the measured values are valid. The measurement can be continued.

If the difference is greater, adjust the transducer distance to the displayed optimum value. Afterwards, check the signal quality and the signal amplitude bar graph (see section

10.6.1). Press ENTER.

Tab. 10.1: Standard values for signal optimization

transducer frequency difference between the optimum and the entered

transducer distance [mm]

500 kHZ 15

1 MHz 10

2 MHZ 8

Enter the new adjusted transducer distance. Press ENTER.

Press key again to scroll until the transducer distance is displayed and check the difference between optimum and entered transducer distance. Repeat the steps, if necessary.

Note! If the transducer distance is changed during the measurement, the

consistency check will have to be repeated.

10.6.3 Value of the Sound Speed

The sound speed of the fluid can be displayed during the measurement by pressing key

If an approximate range for the sound speed has been entered in the program branch Parameter and the transducer distance has been optimized afterwards as described in section 10.6.2, it is recommended to write down the sound speed for the next measurement. By doing this, it will not be necessary to repeat the fine adjustment.

Also write down the fluid temperature because the sound speed depends on the temperature. The value can be entered in the program branch Parameter.

52 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 53

10 Basic Measurement FLUXUS F401

Volume flow

31.82 m3/h

10.7 Start of the Measurement

The measured values are displayed in the lower line. Press ENTER to return to the fine adjustment of the transducer distance (see section 10.6.1).

The outputs continuously receive the measured values of the corresponding channel. The results are displayed according to the currently selected output options. The default unit of measurement of the volumetric flow rate is m

/h. For the selection of the values to be displayed and for the setting of the output options see chapter 11. For further measuring functions see chapter 12.

10.8 Detection of the Flow Direction

The flow direction in the pipe can be detected with the help of the displayed volumetric flow rate sign in conjunction with the arrow on the transducers:

• The fluid flows in the direction of the arrow if the displayed volumetric flow rate is posi-

tive (e.g., 54.5 m

/h).

• The fluid flows against the arrow direction if the displayed volumetric flow rate is nega-

tive (e.g., -54.5 m³/h).

10.9 Stopping the Measurement

The measurement is interrupted by pressing key BRK if it is not protected by a program code (see section 12.7).

Note! Be careful not to stop a current measurement by inadvertently

UMFLUXUS_F4V1-3EN, 2017-07-17 53

pressing key BRK!

Page 54

FLUXUS F401 11 Displaying the Measured Values

par mea >OPT< sf Output Options

Physic. Quant. ↕ Volume flow

Volume in: ↕ m3/h

11 Displaying the Measured Values

The physical quantity is set in the program branch Output Options (see section 11.1).

During the measurement, the designation of the physical quantity is displayed in the upper line, the measured value in the lower line. The display can be adapted (see section

11.2).

11.1 Selection of the Physical Quantity and of the Unit of Measurement

The following physical quantities can be measured:

• flow velocity: is calculated on the basis of the measured transit time difference

• volumetric flow rate: is calculated by multiplying the flow velocity by the cross-sectional

pipe area

• mass flow rate: is calculated by multiplying the volumetric flow rate by the operating

density of the fluid

The physical quantity is selected as follows:

Select the program branch Output Options. Press EN- TER.

Select the physical quantity in the scroll list. Press ENTER.

For the selected physical quantity, a scroll list with the available units of measurement is displayed. The unit of measurement which was selected previously is displayed first.

Select the unit of measurement of the selected physical quantity. Press ENTER.

Press key BRK to return to the main menu. The further displays of the program branch Output Options are for the activation of the transmission of measured value.

Note! If the physical quantity or the unit of measurement is changed, the

settings of the outputs will have to be checked (see chapter 16).

54 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 55

11 Displaying the Measured Values FLUXUS F401

Flow Velocity * 2.47 m/s

S3 Q9 c RT F↓

11.2 Adjustment of the Display

During the measurement, the display can be adapted as to display two measured values simultaneously (one in each line of the display). This does not affect totalizing, transmission of the measured values, etc.

The following information can be displayed in the upper line:

display explanation

Mass Flow= designation of the physical quantity

+8.879 m3 values of the totalizers

Mode= measuring mode

L= transducer distance

Rx= alarm state indication if it is activated (see section 16.6.5) and if

alarm outputs are activated (see section 16.4).

status line (see section 11.3)

The measured values of the physical quantity selected in the program branch Output Options can be displayed in the lower line:

display explanation

12.3 m/s flow velocity

1423 m/s sound speed

124 kg/h mass flow rate

15 m3/h volumetric flow rate

Press key during the measurement to change the display in the upper line, press key to change the display in the lower line.

11.3 Status Line

Important data on the ongoing measurement are shown in the status line. The quality and precision of the ongoing measurement can be estimated.

UMFLUXUS_F4V1-3EN, 2017-07-17 55

The character * indicates that the displayed value (here: flow velocity) is not the selected physical quantity.

Press key during the measurement to scroll through the upper line to the status line.

Page 56

FLUXUS F401 11 Displaying the Measured Values

value explanation

S signal amplitude

0 … 9

< 5 % … ≥ 90 %

Q signal quality

0 … 9

< 5 % … ≥ 90 %

c sound speed

Comparison of the measured and the expected sound speed of the fluid. The expected sound speed is calculated on the basis of the fluid parameters (fluid selected in the program branch Parameter, temperature dependence).

√ ok, is equal to the expected value ↑ > 20 % of the expected value ↓ < 20 % of the expected value

? unknown, cannot be measured

R flow profile

information about the flow profile based on the Reynolds number

T fully turbulent flow profile

L fully laminar flow profile ↕ the flow is in the transition range between laminar and turbulent flow

? unknown, cannot be calculated

F flow velocity

comparison of the measured flow velocity with the flow limits of the system

√ ok, the flow velocity is not in the critical range ↑ the flow velocity is higher than the current limit ↓ the flow velocity is lower than the current cut-off flow

(even if it is not set to zero)

0 the flow velocity is in the offset range of the measuring method

? unknown, cannot be measured

56 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 57

11 Displaying the Measured Values FLUXUS F401

L=(51.2) 50.8 mm

54.5 m3/h

11.4 Transducer Distance

By pressing key during the measurement, it is possible to scroll to the display of the transducer distance.

The optimum transducer distance (here: 51.2 mm) will be displayed in parentheses in the upper line, followed by the entered transducer distance (here: 50.8 mm).

The optimum transducer distance might change during the measurement (e.g., due to temperature fluctuations).

A deviation from the optimum transducer distance (here: -0.4 mm) will be compensated internally.

Note! Never change the transducer distance during the measurement!

UMFLUXUS_F4V1-3EN, 2017-07-17 57

Page 58

FLUXUS F401 12 Advanced Measuring Functions

S=   < > =54 mm!

32.5 m3

54.5 m3/h

Damping

10 s

12 Advanced Measuring Functions

12.1 Command Execution during Measurement

Commands that can be executed during a measurement are shown in the upper line. A command begins with →. If programmed, a program code has to be entered (see sec-

tion 12.7).

Press key until the command is displayed. Press ENTER. The following commands are available:

Tab. 12.1: Executable commands during measurement

command explanation

→Adjust transd.

Select transducer positioning.

If a program code is active, the measurement will be continued 8 s after the last keyboard entry.

→Clear totalizer

All totalizers will be reset to zero.

→Break measure stop the measurement and return to the main menu

12.2 Damping Factor

Each displayed measured value is the floating average of all measured values of the last x seconds, where x is the damping factor. A damping factor of 1 s means that the measured values are not averaged as the measuring rate is approx 1/s.

The default value of 10 s is appropriate for normal flow conditions. Values which fluctuate strongly due to of a higher flow dynamic, require a higher damping factor.

Select the program branch Output Options. Press ENTER until the menu item Damp- ing is displayed.

Enter the damping factor. Press ENTER.

Press key BRK to return to the main menu.

58 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 59

12 Advanced Measuring Functions FLUXUS F401

Volume flow

54.5 m3/h

32.5 m3

54.5 m3/h

NO COUNTING !

3.5 m/s

Quantity Storage one >BOTH<

12.3 Totalizer

The total volume and total mass of the fluid at the measuring point can be determined.

There are 2 totalizers, one for the positive flow direction, one for the negative flow direction. The unit of measurement used for totalization corresponds to the volume or mass unit selected for the physical quantity.

The value of a totalizer consists of max. 11 digits, including max. 4 decimal places. For the adjustment of the number of decimal places see section 15.6.

Press key to scroll through the upper line and display the totalizers.

The value of the totalizer will be displayed in the upper line (here: the volume which has passed through the pipe at the measuring point in the positive flow direction after the activation of the totalizers).

Press ENTER while a totalizer is displayed to toggle between the display of the totalizers for the two flow directions.

Select the command →Clear totalizer in the upper line to reset the totalizers to zero. Press ENTER.

This error message will be displayed when trying to activate the totalizers of the measuring channel in which the flow velocity is selected as physical quantity. The flow velocity cannot be totalized.

Selection of the Totalizers for Storing

It is possible to store only the value of the totalizer that is currently displayed or one value for each flow direction. Select Special Funct.\SYSTEM settings\Stor- ing\Quantity Storage.

When the Measurement Is Stopped

The behavior of the totalizers when the measurement is stopped or after a RESET of the transmitter is set in Special Funct.\SYSTEM settings\Measuring\Quantity recall.

UMFLUXUS_F4V1-3EN, 2017-07-17 59

If one is selected, only the value of the totalizer that is currently displayed will be stored.

If both is selected, the values of the totalizers for both flow directions will be stored.

Press ENTER.

Page 60

FLUXUS F401 12 Advanced Measuring Functions

Quantity recall off >ON<

Quant. wrapping off >ON<

If on is selected, the values of the totalizers will be stored and used for the next measurement.

If off is selected, the totalizers will be reset to zero.

12.3.1 Overflow of the Totalizers

The overflow behavior of the totalizers can be set:

Without overflow:

• The value of the totalizer increases to the internal limit of 1038.

• The values will be displayed as exponential numbers (±1.00000E10), if necessary. The

totalizer can only be reset to zero manually.

With overflow:

• The totalizer will be reset to zero automatically when ±9999999999 is reached.

Select Special Funct.\SYSTEM settings\Measuring\Quant. wrapping.

Select on to work with overflow. Select off to work without overflow. Press ENTER.

Independently of the setting, the totalizers can be reset to zero manually.

Note! The overflow of a totalizer influences all output channels, e.g., data

logger, online transmission of data.

The output of the sum of both totalizers (the throughput Q) via an output will not be valid after the first overflow (wrapping) of one of the corresponding totalizers.

To signalize the overflow of a totalizer, an alarm output with the switching condition QUANT. and the type HOLD has to be activated.

12.4 Upper Limit of the Flow Velocity

Single outliers caused by heavily disturbed surroundings can appear among the measured values of the flow velocity. If the outliers are not ignored, they will affect all derived physical quantities, which will then be unsuitable for the integration (e.g., pulse outputs).

It is possible to ignore all measured flow velocities higher than a preset upper limit. These measured values will be marked as outliers.

60 UMFLUXUS_F4V1-3EN, 2017-07-17

Page 61

12 Advanced Measuring Functions FLUXUS F401

Velocity limit

0.0 m/s

Cut-off Flow absolut >SIGN<

Cut-off Flow factory >USER<

The upper limit of the flow velocity is set in Special Funct.\SYSTEM settings\Measuring\Velocity limit.

Enter 0 (zero) to switch off the checking for outliers.

Enter a limit > 0 to switch on the checking for outliers. The measured flow velocity will then be compared to the entered upper limit.

Press ENTER.

If the flow velocity is higher than the upper limit,

• the flow velocity will be marked as invalid. The physical quantity cannot be determined.

• "!" will be displayed after the unit of measurement (in case of a normal error, "?" is displayed

Note! If the upper limit is too low, a measurement might be impossible be-

cause most of the measured values will be marked as "invalid".

12.5 Cut-Off Flow

The cut-off flow is a lower limit for the flow velocity. All measured flow velocities that are lower than the limit and their derived values are set to zero.

The cut-off flow can depend on the flow direction or not. The cut-off flow is set in Spe- cial Funct.\SYSTEM settings\Measuring\Cut-off Flow.

Select sign to define a cut-off flow in dependence on the flow direction. Two independent limits are set for the positive and negative flow directions.

Select absolut to define a cut-off flow independently of the flow direction. A limit is set for the absolute value of the flow velocity.

Press ENTER.

UMFLUXUS_F4V1-3EN, 2017-07-17 61

Select factory to use the default limit of 2.5 cm/s (0.025 m/s) for the cut-off flow.

Select user to enter the cut-off flow.

Press ENTER.

Page 62

FLUXUS F401 12 Advanced Measuring Functions

+Cut-off Flow

2.5 cm/s

-Cut-off Flow

-2.5 cm/s

Cut-off Flow

2.5 cm/s

Flow Velocity >NORMAL< uncorr.

PROFILE CORR. >NO< yes

FLOW VELOCITY

2.60 m/s

If Cut-off Flow\sign and user are selected, two values will have to be entered:

Enter the cut-off flow. Press ENTER.

All positive values of the flow velocity that are lower than this limit will be set to zero.

Enter the cut-off flow. Press ENTER.

All negative values of the flow velocity greater than this limit will be set to zero.

If Cut-off Flow\absolut and user is selected, only one value will have to be entered:

Enter the cut-off flow. Press ENTER.

The absolute values of all flow velocity values that are lower than this limit will be set to zero.

12.6 Uncorrected Flow Velocity

For special applications, the uncorrected flow velocity might be of interest.

The profile correction for the flow velocity is activated in Special Funct.\SYSTEM settings\Measuring\Flow Velocity.

Select normal to display and output the flow velocity with profile correction.

Select uncorr. to display the flow velocity without profile correction. Press ENTER.

If uncorr. is selected, it has to be confirmed each time the program branch Measuring is selected if the profile correction is to be used.

If no is selected, the profile correction will be switched off.

All physical quantities will be calculated with the uncorrected flow velocity.

During the measurement, the designation of the physical quantity will be displayed in capital letters to indicate that the value is uncorrected.

Press ENTER.

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12 Advanced Measuring Functions FLUXUS F401

PROFILE CORR. no >YES<

Flow Velocity *U 54.5 m/s

Special Funct. ↕ Program code

Program code

------

INVALID CODE ! 909049

If yes is selected, the uncorrected flow velocity will only be used if the flow velocity is selected as the physical quantity in the program branch Output Options.

All other physical quantities (volumetric flow rate, mass flow, etc.) will be determined with the corrected flow velocity.

During the measurement, the designation of the physical quantity will be displayed in capital letters to indicate that the value is uncorrected.

Press ENTER.

In both cases, the corrected flow velocity can also be displayed.

Press key to scroll until the flow velocity is displayed. The uncorrected flow velocity is marked with U.

Uncorrected flow velocities transmitted to a PC are marked with uncorr..

12.7 Program Code

An ongoing measurement can be protected from an inadvertent intervention by a program code. If a program code has been defined, it will be requested when there is an intervention in the measurement (a command or key BRK).

12.7.1 Defining a Program Code

Select Special Funct.\Program code.

A program code will remain valid as long as:

• no other valid program code is entered or

• the program code is not deactivated.

Note! Do not forget the program code!

UMFLUXUS_F4V1-3EN, 2017-07-17 63

Enter a program code with max. 6 digits. Press ENTER.

An error message will be displayed if a reserved number has been entered (e.g., a HotCode for language selection).

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FLUXUS F401 12 Advanced Measuring Functions

INPUT BREAK_CODE CODE: 000000

INPUT BREAK_CODE INVALID CODE !

INP. ACCESS CODE CODE: 000000

Program code

------

12.7.2 Intervention in the Measurement

If a program code is active, the message PROGRAM CODE ACTIVE will be displayed for a few seconds when a key is pressed.

The input of a program code is interrupted by pressing key C.

If key BRK is pressed:

To stop an ongoing measurement, the complete program code has to be entered (= Break Code).

Enter the program code with the keys and . Press ENTER.

If the entered program code is invalid, an error message will be displayed for a few seconds.

If the entered program code is valid, the measurement will be stopped.

If a command is selected:

To execute a command, it is sufficient to enter the first three digits of the program code (= Access Code).

Enter the first three digits of the program code with the keys and .

Press ENTER.

At first, 000000 is displayed. If the program code starts with 000, ENTER can be pressed immediately.

12.7.3 Deactivation of the Program Code

Select Special Funct.\Program code. The program code is deleted by entering "------". Press

ENTER. If the character "-" is entered less than six times, this

character sequence will be used as the new program code.

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12 Advanced Measuring Functions FLUXUS F401

DSP-SignalSnap off >ON<

DSP-SignalSnap Install Snap

Snap-Memory

5 NUM

AutoSnap >NO< yes

Snap ringbuffer >NO< yes

DSP-SignalSnap Clear Snaps

DSP-SignalSnap Snaps ->Rs232

12.8 Diagnosis with by means of the Snap Function

With the aid of the snap function it is possible to store measuring parameters which are useful for the evaluation of measuring results or for diagnostic purposes.

The snap function is activated in Special Funct.\SYSTEM settings\Signal snap\DSP-SignalSnap.

Select on to activate the snap function. Select off to deactivate the snap function. Press ENTER.

Settings for the Snap Memory

Select Install Snap. Press ENTER.

Enter the number of the snap memory capacity. Press ENTER.

Activation and deactivation of the auto-snap function. Press ENTER.

Activation and deactivation of the snap ringbuffer. Press ENTER.

Delete Snaps

Read Snaps

Activation of the Snap Function

In order to activate a snap function, press key during the measurement until DSPSignalSnap/Voltage is displayed in the upper line. Press ENTER.

UMFLUXUS_F4V1-3EN, 2017-07-17 65

Select Clear Snaps. Press ENTER.

Select Snaps ->Rs232. Press ENTER.

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FLUXUS F401 13 Data Logger and Transmission of Data

Store Meas.Data no >YES<

13 Data Logger and Transmission of Data

The transmitter has a data logger in which the measured values are stored during the measurement (see section 13.1).

The measured values are transmitted to a PC via the serial interface directly during the measurement (see section 13.2).

For the connection of the serial interface see section 7.5.

13.1 Data Logger

The following data will be stored:

• date

•time

• measuring point number

• pipe parameters

• fluid parameter

• transducer data

• sound path (reflection or diagonal arrangement)

• transducer distance

• damping factor

• storage rate

• physical quantity

• unit of measurement

• measured values (physical quantity and input quantities)

• values of the totalizers (if totalizers are activated)

• diagnostic values

In order to store the measured data, the data logger has to be activated (see section

13.1.1).

The available data logger memory can be displayed (see section 13.1.6).

13.1.1 Activation/Deactivation of the Data Logger

Select the program branch Output Options. Press EN- TER until the menu item Store Meas.Data is displayed.

Select yes to activate the data logger, no to deactivate it. Press ENTER.

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13 Data Logger and Transmission of Data FLUXUS F401

Storage Rate ↕ Once per 10 sec.

Storage Rate

Ringbuffer off >ON<

13.1.2 Setting the Storage Rate

The storage rate is the frequency at which the measured values are transmitted or stored.

If the storage rate is not set, the storage rate which was selected previously will be used. A min. of 10 s are recommended.

Select a storage rate or EXTRA. Press ENTER.

This display will only be indicated if Store Meas.Data and/or Serial Output are activated.

If EXTRA is selected, enter the storage rate. Press ENTER.

13.1.3 Settings for the Data Logger

Select Special Funct.\SYSTEM settings\Storing. It contains the following menu items:

• ringbuffer

• storage mode

• storing of the totalizers

• storing of the signal amplitude

• storing of the sound speed of the fluid

• storing of the diagnostic values

Ringbuffer

Setting the ringbuffer influences the storing of measured values once the data logger is full.

• If the ringbuffer is activated, the available data logger will be halved. The oldest measured values will be overwritten. Only the data logger memory that was free during the activation will be used by the ringbuffer. If more data logger memory is necessary, measured values in the data logger should previously be deleted.

• If the ringbuffer is deactivated, the storing of measured values will be stopped.

UMFLUXUS_F4V1-3EN, 2017-07-17 67

Select the behavior of the ringbuffer. Press ENTER.

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FLUXUS F401 13 Data Logger and Transmission of Data

Storage mode >SAMPLE< average

Store Amplitude off >ON<

Store c-Medium off >ON<

Store diagnostic off >ON<

Storage Mode

Select the storage mode. Press ENTER.

If sample is selected, the displayed measured  value will be used for storing and online transmission of data.

If average is selected, the average of all values measured during a storage interval will be used for storing and online transmission of data.

Note! The storage mode does not affect the outputs.

Note! Storage mode = average

The average of the physical quantity and other physical quantities assigned to the measuring channel, will be calculated.

If the storage rate < 5 s (see section 13.1.2) is selected, the sam- ple will be used.

If no average could be calculated over the complete storage interval, the value will be marked as invalid. The ASCII file will contain "???" for invalid average values of the measured value.

Storing of the Totalizers

See section 12.3.

Storing of the Signal Amplitude

If on is selected and the data logger is activated, the amplitude of the measured signal will be stored together with the measured values. Press ENTER.

Storing of the Sound Speed of the Fluid

If on is selected and the data logger is activated, the sound speed of the fluid will be stored together with the measured values. Press ENTER.

Storing of the Diagnostic Values

If on is selected and the data logger is activated, the diagnostic values will be stored together with the measured values. Press ENTER.

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13 Data Logger and Transmission of Data FLUXUS F401

Meas.Point No.: xxx (↑↓← →)

DATA MEMORY OVERFLOW!

Special Funct. ↕ Delete Meas.Val.

Really Delete? no >YES<

Special Funct. ↕ Instrum. Inform.

F 401 - XXXXXXXX Free: 18327

13.1.4 Measurement with Activated Data Logger

• Start the measurement.

Enter the measuring point number. Press ENTER.

If arrows are displayed in the lower line on the right, ASCII text can be entered. If digits are displayed, only digits, point and hyphen can be entered.

For the setting of the input mode see section 14.2.2.

If Output Options\Store Meas.Data has been activated and Special Funct.\ SYSTEM settings\Ringbuffer is deactivated, this error message will be displayed as soon as the data logger is full.

Press ENTER.

The error message will be displayed periodically.

13.1.5 Deleting the Measured Values

Select Special Funct.\Delete Meas.Val.. Press ENTER.

Select yes or no. Press ENTER.

13.1.6 Available Data Logger Memory

If the data logger is empty and a measurement is started with one physical quantity on one measuring channel without storing the totalizer, approx. 100 000 measured values can be stored. The available data logger memory can be displayed:

Max. 100 series of measured values can be stored. The number of series of measured values depends on the total number of measured values stored in the previous series of measured values.

UMFLUXUS_F4V1-3EN, 2017-07-17 69

Select Special Funct.\Instrum. Inform.. Press ENTER.

The type and the serial number of the transmitter is displayed in the upper line.

The available data logger memory will be displayed in the lower line (here: 18 327 additional measured values can be stored). Press twice key BRK to return to the main menu.

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FLUXUS F401 13 Data Logger and Transmission of Data

full= 26.01/07:39

54.5 m3/h

last= 26.01/07:39

54.5 m3/h

The time at which the data logger will be full, will be displayed during the measurement. All activated channels, totalizers and other values will be considered.

Press key to scroll through the display of the upper line.

If the ringbuffer is activated and has overflown at least once, this display will be indicated.

13.2 Transmission of Data

The measured values are transmitted to a PC via the serial interface RS232 or RS485 (optional).

13.2.1 Online Transmission of Data

The measured values are transmitted during the measurement. If the data logger is acti-vated, the measured values will also be stored.

Tab. 13.1: Overview online transmission of data

serial interface transmission of data see

RS232 terminal program section 13.2.5 RS485 terminal program section 13.2.5

The data logger works independently of the online transmission.

Note! It is recommended to use the RS485 interface for the online trans--

mission of data. The RS232 interface should only be used if the transmitter does not have an RS485 interface.

13.2.2 Offline Transmission of Data

The measurement data of the data logger are transmitted.

Tab. 13.2: Overview offline transmission of data

serial interface transmission of data see

RS232 terminal program section 13.2.6 RS232 FluxData section 13.2.7 RS485 terminal program section 13.2.6

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13 Data Logger and Transmission of Data FLUXUS F401

Send Offline via RS232 >RS485<

SER:kill spaces off >ON<

SER:decimalpoint ’.’ >’,’<

SER:col-separat. ’;’ >’TAB’<

BAUD<data par st 9600 8bit EVEN 2

Selection of the Serial Interface for the Offline Transmission of Data

Select Special Funct.\SYSTEM settings\serial transmis. Press ENTER until Send Offline via is displayed.

Select the serial interface for the offline transmission of da-ta.

This display will only be indicated if the transmitter has an RS485 interface.

13.2.3 Formatting of the Measurement Data

Select Special Funct.\SYSTEM settings\serial transmis.

Select on if the space characters are not to be transmitted. Press ENTER.

The file size will be considerably smaller (shorter transmis-sion time).

Select the decimal marker to be used for floating-point numbers (point or comma). Press ENTER.

This setting depends on the setting of the operating sys-tem of the PC.

Select the character to be used to separate columns (semicolon or tabulator). Press ENTER.

13.2.4 Transmission Parameters

• the transmitter sends CRLF-terminated ASCII

• max. line length: 255 digits

RS232

• default: 9600 bits/s, 8 data bits, even parity, 2 stop bits, protocol RTS/CTS (hardware, handshake)

The transmission parameters of the RS232 interface can be changed:

Enter the HotCode 232-0-.

UMFLUXUS_F4V1-3EN, 2017-07-17 71

Set the transmission parameters in the 4 scroll lists. Press ENTER.

• baud: baud rate

• data: number of data bits

• par: parity

• st: number of stop bits

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FLUXUS F401 13 Data Logger and Transmission of Data

SYSTEM settings↕ Network

Device address: 0 ADR

RS485 protocol default >SETUP<

>BAUD< parity st 9600 EVEN 1

Serial Output no >YES<

RS485

• default: 9600 bits/s, 8 data bits, even parity, 1 stop bit

The transmission parameters for the RS485 interface can be changed in the program branch Special Funct.\SYSTEM settings\Network. This display will only be indicated if the transmitter has an RS485 interface.

Select Special Funct.\SYSTEM settings\Network- to change the settings of the transmission parameters.

Press ENTER to confirm the address of the measuring instrument in the network.

Select default to display the default transmission param-eters.

Select setup to change the transmission parameters. Press ENTER.

Set the transmission parameters in the 3 scroll lists. Press ENTER.

• baud: baud rate

• parity: parity

• st: number of stop bits

The default transmission parameters will be set if de- fault is selected and the transmission parameters have not been changed.

13.2.5 Online Transmission of Data to a Terminal Program

• Start the terminal program.

• Enter the transmission parameters into the terminal program (see section 13.2.4). The transmission parameters of the terminal program and of the transmitter have to be identical.

Settings in the Transmitter

• Select the program branch Output Options. Press ENTER until the menu item Serial Output is displayed.

Select yes to activate the online transmission of data. Press ENTER.

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13 Data Logger and Transmission of Data FLUXUS F401

SEND ONLINE-HEAD

20 mm

Special Funct. ↕ Print Meas.Val.

NO VALUES ! Print Meas.Val.

Send Header 01

................

■ ■ ■ ■ ■ ■

................

SERIAL ERROR ! Print Meas.Val.

• Set the storage rate (see section 13.1.2).

• Start the measurement. The measuring point number will be requested (see section

13.1.4).

The measured values are transmitted during the measurement.

13.2.6 Offline Transmission of Data to a Terminal Program

• Start the terminal program.

• Enter the transmission parameters into the terminal program (see section 13.2.4). The transmission parameters of the terminal program and of the transmitter have to be identical.

Select Special Funct.\Print Meas.Val.. Press EN- TER.

This error message will be displayed if no measured val-ues are stored. Press ENTER.

This message will be displayed if the measuring signal is sufficient.

UMFLUXUS_F4V1-3EN, 2017-07-17 73

The progress of the transmission of data is displayed by a bar graph.

This error message will be displayed if an error has oc-curred during the serial transmission. Press ENTER. Check the connections and make sure that the PC is ready to receive data.

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FLUXUS F401 13 Data Logger and Transmission of Data

13.2.7 Offline Transmission of Data with the Program FluxData

The measurement data in the data logger are transmitted to a PC via the serial interface RS232 with the FLEXIM program FluxData.

Settings in the Program

Start the program FluxData V3.0 or higher on the PC.

Select the menu: Options > Serial interface.

Select the serial interface used from the PC (e.g., COM1).

Click Protocol. Click OK.

Enter the transmission parameters (see section 13.2.4). If the default settings of the transmission parameters are to be used, click Default protocol.

The transmission parameters of FluxData and transmitter have to be identical.

Click OK.

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13 Data Logger and Transmission of Data FLUXUS F401

Transmission of Data

Select the menu: DUT > Receive measuring values.

Wait until the data are transmitted.

Stop of the Transmission of Data

Select the menu: File > Save.

Select the series of measured values to be stored. Click OK.

Select the path on which the data should be stored and enter the file name. Click Save.

The file will be stored with the file extension .flx.

UMFLUXUS_F4V1-3EN, 2017-07-17 75

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FLUXUS F401 13 Data Logger and Transmission of Data

13.2.8 Structure of the Data

The header is transmitted at the beginning of the measurement. The first 4 lines contain general information about the transmitter and the measurement. The following lines contain the parameters of each channel.

Example: \DEVICE : F401-XXXXXXXX

\MODE : ONLINE DATE : 2011-01-09 TIME : 19:56:52 Par.Record Meas.Point No.: : F5050 Pipe Outer Diameter : 60.3 mm Wall Thickness : 5.5 mm Roughness : 0.1 mm Pipe Material : Carbon Steel Lining : WITHOUT LINING Medium : Water Medium Temperat. : 38 C Fluid pressure : 1.00 bar Transducer Type : xxx Sound Path : 3 NUM Transd. Distance : -15.6 mm Damping : 20 s Full-Scale Val. : 4.50 m3/h Physic. Quant. : Volume flow Unit Of Measure : [m3/h]/[m3] Numb.Of Meas.Val : 100

The line \DATA is transmitted next followed once by the column titles (see Tab. 13.3) for the corresponding channel. The measured values are transmitted afterwards.

Example: \DATA

\*MEASURE; Q_POS; Q_NEG;

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13 Data Logger and Transmission of Data FLUXUS F401

In every storage interval, one data line per activated measuring channel is transmitted. The line "???" will be transmitted if there are no measured values available for the stor-age interval.

Example: With a storage interval of 1 s, 10 lines with "???" will be transmitted

if the measurement has been restarted after a 10 s interruption for the positioning of the transducers.

The following data columns can be transmitted:

Tab. 13.3: Columns of data

column title column format content

\*MEASURE ###000000.00 the physical quantity selected in Output

Options

Q_POS +00000000.00 totalizer value for the positive flow direction

Q_NEG -00000000.00 totalizer value for the negative flow direction

SSPEED sound speed of the fluid

AMP signal amplitude

Online Transmission of Data

Columns will be created for all quantities that appear during the measurement.

As the totalizers cannot be activated for the physical quantity flow velocity, these columns will not be generated.

Offline Transmission of Data

During the offline transmission of data, columns will only be created if at least one measured value is stored in the data set.

UMFLUXUS_F4V1-3EN, 2017-07-17 77

Page 78

FLUXUS F401 14 Settings

SYSTEM settings↕ Set Clock

TIME 11:00 ok >NEW<

TIME 11:00 Set Time !

TIME 11:11 >OK< new

DATE 25.012011 ok >NEW<

DATE 25.012011 Set Date !

DATE 26.012011 >OK< new

SYSTEM settings↕ Dialogs/Menus

14 Settings

14.1 Time and Date

The transmitter has a battery-powered clock.

14.1.1 Time

Select Special Funct.\SYSTEM settings\Set Clock. Press ENTER.

The current time is displayed. Select ok to confirm the time or new to set the time. Press ENTER.

Select the character to be edit with key .

Edit the selected character with key and C. Press ENTER.

The new time is displayed. Select ok to confirm the time or new to set the time again. Press ENTER.

14.1.2 Date

After the time has been set, DATE is displayed.

Select ok to confirm the date or new to set the date. Press ENTER.

Select the character to be edit with key .

Edit the selected character with key and C. Press ENTER.

The new date is displayed. Select ok to confirm the date or new to set the date again. Press ENTER.

14.2 Dialogs and Menus

Select Special Funct.\SYSTEM settings\Dialogs/Menus. Press ENTER.

Note! The settings will be stored at the end of the dialog. If the menu item

is quit by pressing key BRK, the changes will not be stored.

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14 Settings FLUXUS F401

Pipe Circumfer. off >ON<

Outer Diameter

100.0 mm

Pipe Circumfer.

314.2 mm

Pipe Circumfer.

180 mm

Outer Diameter

57.3 mm

Meas.Point No.: (1234) >(↑↓← →)<

14.2.1 Pipe Circumference

Select on if the pipe circumference is to be entered instead of the pipe diameter in the program branch Parameter. Press ENTER.

If on is selected for Pipe Circumfer., the outer pipe diameter will nevertheless be requested in the program branch Parameter.

To select the menu item Pipe Circumfer., enter 0 (zero). Press ENTER.

The value displayed in Pipe Circumfer. is calculated on the basis of the last displayed value of the outer pipe diameter.

example: 100 mm

Enter the pipe circumference. The limits for the pipe circumference are calculated on the basis of the limits for the outer pipe diameter.

During the next scroll through the program branch Param- eter, the outer pipe diameter that corresponds to the entered pipe circumference will be displayed.

example: 180 mm : π = 57.3 mm

π = 314.2 mm

Note! The pipe circumference is only edited temporarily. When the trans-

Example: entered pipe circumference: 100 mm 

14.2.2 Measuring Point Number

UMFLUXUS_F4V1-3EN, 2017-07-17 79

mitter switches back to the display of the pipe circumference (internal recalculation), slight rounding errors may occur.

displayed outer pipe diameter: 31.8 mm

When the transmitter switches back to the display of the pipe circumference, 99.9 mm will be displayed.

Select (1234) if the measuring point is to be identified only by numbers, point and dash.

Select (↑↓← →) if the measuring point is to be designated with ASCII characters.

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FLUXUS F401 14 Settings

Transd. Distance auto >USER<

Transd. Distance?

(50.8) 50.0 mm

Transd. Distance?

50.8 mm

Error-val. delay damping >EDIT<

SHOW RELAIS STAT off >ON<

Length unit >[mm]< [inch]

14.2.3 Transducer Distance

recommended setting: user

• user will be selected if the measuring point is always the same.

• auto can be selected if the measuring point changes often.

In the program branch Measuring, the recommended transducer distance will be displayed in parentheses, followed by the entered transducer distance if the recommended and the entered transducer distance are not identical.

During transducer positioning in the program branch Mea-

suring

• only the entered transducer distance will be displayed if Transd. Distance = user is selected and the recommended and the entered transducer distances are identical

• only the recommended transducer distance will be displayed if Transd. Distance = auto is selected.

14.2.4 Error Value Delay

The error value delay is the time after which an error value will be sent to an output if no valid measured values are available.

Select edit to enter an error value delay. Select damping if the damping factor is to be used as the error value delay.

For further information on the behavior of missing measured values see section 16.1.2 and 16.2.

14.2.5 Alarm State Indication

Select on to display the alarm state during the measurement.

For further information on the alarm outputs see section

16.5.

14.2.6 Units of Measurement

It is possible to set the units of measurement for the length, temperature, pressure, density and kinematic viscosity and sound speed:

Select mm or inch as the unit of measurement for the length. Press ENTER.

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14 Settings FLUXUS F401

Temperature >[°C]< [°F]

Pressure >[bar]< [psi]

Density [lb/ft3] no >YES<

Density unit g/cm3 >kg/m3<

Viscosity unit mm2/s >cSt<

Soundspeed unit >[m/s]< [fps]

Pressure absolut off >ON<

Fluid pressure

1.00 bar(a)

Select °C or °F as the unit of measurement for the temperature. Press ENTER.

Select bar or psi as the unit of measurement for the pressure. Press ENTER.

Select yes if lb/ft

is to be used as the unit of measure-

ment for the density. Press ENTER.

Select g/cm3 or kg/m3 as the unit of measurement for the density. Press ENTER.

This display will only be indicated if lb/ft

has not been

selected as the unit of measurement for the density.

Select mm

/s or cSt as the unit of measurement for the ki-

nematic viscosity. Press ENTER.

Select m/s or fps as the unit of measurement for the sound speed. Press ENTER.

14.2.7 Setting for the Fluid Pressure

It is possible to set whether the absolute or the relative pressure will be used:

Note! The settings will be stored at the end of the dialog.

UMFLUXUS_F4V1-3EN, 2017-07-17 81

Select on or off. Press ENTER.

If on is selected, the absolute pressure p

will be dis-

played/input/transmitted.

If off is selected, the relative pressure p

will be dis-

played/input/transmitted.

= pa - 1.01 bar

The pressure and its unit of measurement will, e.g., be displayed in the program branch Parameter. It will be followed by the selected pressure, indicated in parentheses.

a - absolute pressure g - relative pressure

Page 82

FLUXUS F401 14 Settings

SYSTEM settings↕ Measuring

Flow Velocity >NORMAL< uncorr.

Cut-off Flow absolut >SIGN<

Cut-off Flow factory >USER<

Velocity limit

24.0 m/s

Quant. wrapping off >ON<

Quantity recall off >ON<

14.3 Measurement Settings

Select Special Funct.\SYSTEM settings\Measuring. Press ENTER.

Note! The settings will be stored at the end of the dialog. If the menu item

is quit by pressing key BRK, the changes will not be stored.

Select normal to display and transmit the profile corrected flow values, uncorr. to display and output the flow values without flow profile correction. Press ENTER.

For further information see section 12.6.

A lower limit for the flow velocity can be entered (see section 12.5).

An upper limit for the flow velocity can be entered (see section 12.4).

Enter 0 (zero) to deactivate the flow velocity check.

Select the overflow behavior of the totalizers (see section

12.3.1).

Select on to keep the previous totalizer values after a restart of the measurement.

Select off to reset the totalizers to zero after a restart of the measurement.

Note! The settings will be stored at the end of the dialog.

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14 Settings FLUXUS F401

SYSTEM settings↕ Miscellaneous

SETUP DISPLAY ← CONTRAST →

Special Funct. ↕ Instrum. Inform.

F 401 -XXXXXXXX Free: 18327

F 401 -XXXXXXXX V x.xx dd.mm.yy

14.4 Setting the Contrast

Select Special Funct.\SYSTEM settings\ Miscellaneous to set the contrast of the display of the transmit-

ter. Press ENTER.

The contrast of the display is adjusted with the following keys:

increases the contrast

reduces the contrast

It is possible to reset the display to medium contrast. Enter the HotCode 555000.

Note!

After an initialization of the transmitter, the display is reset to medium contrast.

14.5 Instrument Information

Select Special Funct.\Instrum. Inform. to display information about the transmitter. Press ENTER.

The type and the serial number of the transmitter is displayed in the upper line.

The available data logger memory will be displayed in the lower line (here: 18 327 additional measured values can be stored). For further information about the data logger see section 13.1.6.

Press ENTER.

The type and the serial number of the transmitter is displayed in the upper line.

The firmware version of the transmitter with the date is displayed in the lower line.

Press ENTER.

UMFLUXUS_F4V1-3EN, 2017-07-17 83

Page 84

FLUXUS F401 15 SuperUser-Modus

SUPERUSER MODE *IS ACTIVE NOW*

SUPERUSER MODE IS PASSIVE NOW

Measuring ↕ Calibration

15 SuperUser-Modus

The SuperUser mode offers the possibility of an advanced analysis of the signal and the measured values as well as the definition of additional parameters adapted to the measuring point, in order to achieve better measuring values or during experimental work. Features of the SuperUser mode are:

• Default settings are not complied.

• There are no plausibility checks during parameter entry.

• There is no check whether the entered parameters are within the limits determined by the laws of physics and technical data.

• The cut-off flow is not active.

• A value for the number of sound paths has to be entered.

• Some menu items that are not visible in the normal the normal mode are displayed.

Attention! The SuperUser mode is intended for experienced users with ad-

vanced application knowledge. The parameters can affect the normal measuring mode and lead to wrong measuring values or to a failure of the measurement when a new measuring point is set up.

15.1 Activation/Deactivation

Enter the HotCode 071049.

It is displayed that the SuperUser mode is activated. Press ENTER.

The main menu will be displayed.

Enter HotCode 071049 again to deactivate the SuperUser mode.

It is displayed that the SuperUser mode is deactivated. Press ENTER.

The main menu will be displayed.

Attention! Some of the defined parameters are still active after the deactiva-

tion of the SuperUser mode.

15.2 Defining Flow Parameters

In the SuperUser mode, it is possible to define some flow parameters (profile bounds, correction of the flow velocity) for the specific application or measuring point.

Select Special Funct.\SYSTEM settings\ Mea- suring\Calibration. Press ENTER.

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15 SuperUser-Modus FLUXUS F401

Profile bounds factory >USER<

Laminar flow ifR*< 0

Turbulent flow if R*> 0

Calibration ? >OFF< on

15.2.1 Profile Bounds

Select user if the profile bounds are to be defined. If factory is selected, the default profile bounds will be used

and the menu item Calibration will be displayed (see section 15.2.2).

Press ENTER.

Enter the max. Reynolds number at which the flow is laminar. The entered number will be rounded to the hundreds. Enter 0 (zero) to use the default value of 1000.

Press ENTER.

Enter the min. Reynolds number at which the flow is turbulent. The entered number will be rounded to the hundreds. Enter 0 (zero) to use the default value of 3000.

Press ENTER.

A request is displayed if an additional correction of the flow velocity is to be defined. Select on to define the correction data, off to work without correction of the flow velocity and return to the menu item SYSTEM settings.

For the definition of the correction of the flow velocity see section 15.2.2.

Example: profile bound for the laminar flow: 1500

Attention! The defined profile bounds are still active after the deactivation of

UMFLUXUS_F4V1-3EN, 2017-07-17 85

profile bound for the turbulent flow: 2500

At Reynolds numbers < 1500, the flow during the measurement is regarded as laminar for the calculation of the physical quantity. At Reynolds numbers > 2500, the flow is regarded as turbulent. The range 1500...2500 is the transition range between laminar and turbulent flow.

the SuperUser mode.

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FLUXUS F401 15 SuperUser-Modus

Calibration ? off >ON<

Slope=

1.000

Offset=

0.0 cm/s

15.2.2 Correction of the Flow Velocity

After the profile bounds have been defined (see section 15.2.1), it is possible to define a correction of the flow velocity.

= m . v + n

cor

with

v – measured flow velocity

m – slope, range: -2.000...+2.000

n – offset, range: -12.7...+12.7 cm/s

– corrected flow velocity

cor

All quantities derived from the flow velocity will be calculated with the corrected flow velocity. The correction data will be transmitted to the PC or printer during the online or  offline transmission.

Note! During the measurement, it will not be displayed that the correction

of the flow velocity is active.

Select on to define the correction data, off to work without correction of the flow velocity and return to the menu item SYSTEM settings.

If on is selected, enter the slope. If 0.0 is entered, the correction will be deactivated.

Press ENTER.

Enter the offset. Enter 0 (zero) to work without an offset.

Press ENTER.

Example 1: Slope: 1.1

Offset: -10.0 cm/s = -0.1 m/s

If a flow velocity v = 5 m/s is measured, before the calculation of the derived quantities, it will be corrected as follows:

= 1.1 . 5 m/s - 0.1 m/s = 5.4 m/s

cor

Example 2: Slope: -1.0

Offset: 0.0

Only the sign of the measured values is changed.

Note! The correction data will only be stored when a measurement is

started. If the transmitter is switched off without starting a measurement, the entered correction data will be lost.

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15 SuperUser-Modus FLUXUS F401

Gain threshold Fail if > 90 dB

GAIN=91dB→FAIL!

Attention! The correction of the flow velocity is still active after the deactivation

of the SuperUser mode.

15.3 Limit of the Signal Amplification

In order to prevent disturbing and/or pipe wall signals (e.g., if the pipe has run empty) from being interpreted as useful signals, it is possible to define a max. signal amplification. If the signal amplification is greater than the max. signal amplification,

• the flow velocity will be marked as invalid. The physical quantity cannot be determined.

• a hash symbol "#" will be displayed after the unit of measurement (in case of a normal error, "?" is displayed).

Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item Gain threshold is displayed.

Enter for each measuring channel the max. signal amplification. Enter 0 (zero) if no limit of the signal amplification is to be used.

Press ENTER.

The current value of the gain (GAIN=) can be displayed in the upper line in the program branch Measuring. If the actual value of the gain is higher than the max. gain, the actual value is displayed with →FAIL!.

Attention! The limit of the signal amplification is still active after the deactiva-

15.4 Upper Limit of the Sound Speed

When the plausibility of the signal is evaluated, it will be checked if the sound speed is within a defined range. The upper limit of the flow velocity for the fluid is calculated from the greatest of the following values:

• fixed upper value, default: 1 848 m/s

• value of the sound speed curve of the fluid at the operating point plus offset, default offset: 300 m/s

In the SuperUser mode, the values can be defined for fluids that are not contained in the data set of the transmitter. Select Special Funct.\SYSTEM settings\Measur- ing\Miscellaneous. Press ENTER until the menu item Bad soundspeed is displayed.

UMFLUXUS_F4V1-3EN, 2017-07-17 87

tion of the SuperUser mode.

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FLUXUS F401 15 SuperUser-Modus

Bad soundspeed thresh. 2007 m/s

Bad soundspeed offset: +321 m/s

GAIN=91dB SS=1038/2146 m/s

Do not total. if no meas.> 0 s

Enter for each measuring channel the fixed upper limit of the sound speed. Enter 0 (zero) to use the default value 1 848 m/s.

Press ENTER.

Enter for each measuring channel the offset. Enter 0 (zero) to use the default value of 300 m/s.

Press ENTER.

Example: fixed upper value of the sound speed

thresh.: 2 007 m/s offset: 600 m/s

value of the sound speed curve at the operating point: 1 546 m/s

As 1 546 m/s + 600 m/s = 2 146 m/s is greater than the fixed upper value 2 007, this value will be used as the upper limit of the sound speed when the plausibility of the signal is evaluated.

It is possible to display the valid range for the sound speed (SS=)in the lower line within the program branch Measur- ing during the measurement. The second value (here: 2 146 m/s) is the upper limit at the operating point.

Attention! The defined upper limit of the sound speed remains active after the

deactivation of the SuperUser mode.

15.5 Detection of Long Measurement Failures

If there are no valid measured value during a long time interval, new increments of the  totalizers will be ignored. The values of the totalizers remain unchanged.

In the SuperUser mode, it is possible to set the time interval. Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item Do not total. if no meas. is displayed.

Enter the time. If 0 (zero) is entered, the default value 30 s will be used.

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15 SuperUser-Modus FLUXUS F401

Total digits ↕ Automatic

15.6 Number of Decimal Places of the Totalizers

The totalizer values can be displayed with up to 11 places, e.g., 74890046.03. In the SuperUser mode, it is possible to define the number of decimal places.

Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item Total digits is displayed.

Select one of the following list items.

Automatic: dynamic adjustment Fixed to x digit: x decimal places (range: 0...4)

Press ENTER.

Total digits = Automatic

The number of decimal places will be adjusted dynamically. Low totalizer values will first be displayed with 3 decimal places. For higher totalizer values, the number of decimal places will be reduced.

max. value display

< 10

±0.000 ... ±999999.999

±1000000.00 ... ±9999999.99

±10000000.0 ... ±99999999.9

±1000000000 ... ±9999999999

Total digits = Fixed to x digit

The number of decimal points is constant. The max value of the totalizer is reduced with the number of decimal places.

decimal places max. value max. display

0< 10

1< 10

2< 10

3< 10

4< 10

Note! The number of decimal places and the max. value defined here only

For setting the behavior of the totalizers when the max. value is reached see section

12.3.1.

UMFLUXUS_F4V1-3EN, 2017-07-17 89

±9999999999

±99999999.9

±9999999.99

±999999.999

±99999.9999

affect the display of the totalizers.

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FLUXUS F401 15 SuperUser-Modus

3xC clear totals off >ON<

Show ΣQ off >ON<

ΣQ 13.2 m3

Keep display val off >ON<

15.7 Manual Reset of the Totalizers

If the manual reset of the totalizers is activated, the totalizers can also be reset to zero during the measurement by pressing key C 3 times, even if a program code is activated.

Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item 3xC clear totals is displayed.

Select on to activate the manual reset of the totalizers, off to deactivate it. Press ENTER.

Note! The manual reset of the totalizers is still active after the deactivation

of the SuperUser mode.

15.8 Display of the Sum of the Totalizers

The sum of the totalizers for the two flow directions can be displayed in the upper line during the measurement.

Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item Show ΣQ is displayed..

Select on to activate the display of the sum of the totalizers, off to deactivate it. Press ENTER.

If the display of the sum of the totalizers is activated, the sum ΣQ of the totalizer can be displayed in the upper line during the measurement.

15.9 Display of the Last Valid Measured Value

If the signal is not sufficient for a measurement, usually UNDEF will be displayed. Instead of UNDEF, it is also possible to display the last valid measured value.

Select Special Funct.\SYSTEM settings\Measuring\Miscellaneous. Press ENTER until the menu item Keep display val is displayed.

Select on to activate the display of the last valid measured value, off to deactivate it. Press ENTER.

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15 SuperUser-Modus FLUXUS F401

15.10 Display During the Measurement

In the SuperUser mode, the following parameters can be displayed during the measurement besides the normal information (see section 11.2):

display meaning

t= transit time of the measuring signal

c= sound speed

REYNOLD= Reynolds number

VARI A= standard deviation of the signal amplitude

VARI T= standard deviation of the transit time of the measuring signal

dt-norm= transit time difference standardized to the transducer frequency

density of the fluid

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FLUXUS F401 16 Outputs

SYSTEM settings ↕ Proc. outputs

Install Output ↕ Current I1 ()

I1 enable no >YES<

I1 disable >NO< yes

Source item ↕ Measuring value

16 Outputs

If the transmitter is equipped with outputs, they have to be installed and activated before they can be used:

• assign the physical quantity (source item) to be transmitted to the output by the source channel, and the properties of the signal

• define the behavior of the output in case no valid measured values are available

• activate the installed output in the program branch Output Options

16.1 Installation of an Output

All outputs are installed in Special Funct.\SYSTEM settings\Proc. outputs.

Note! The settings will be stored at the end of the dialog. If the menu item

is quit by pressing key BRK, the changes will not be stored.

Select Special Funct.\SYSTEM settings\Proc. outputs. Press ENTER.

Select the output to be installed. Press ENTER.

The scroll list contains all actually available outputs. A tick () after a list item indicates that this output has already been installed.

This display will be indicated if the output has not been installed yet. Select yes. Press ENTER.

If the output has already been installed, select no to reconfigure it or yes to uninstall the output and to return to the previous menu item to select another output. Press ENTER.

Select the physical quantity (source item) to be transmitted to the output by the source channel.

If a binary output is configured, only the list items Limit and Impuls will be displayed.

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16 Outputs FLUXUS F401

I1 Output range↕ 4/20 mA

I1 Output MIN ↕

10.0 mA

I1 Output MAX ↕

11.0 mA

I1 Output MAX ↕

12.0 MINIMAL

The source items and their scroll lists are described in Tab. 16.1.

Tab. 16.1: Configuration of the outputs

source item list item output

Measuring value

- physical quantity selected in the program branch Output Options

Quantity Q+ totalizer for the positive flow direction

Q- totalizer for the negative flow direction

ΣQ sum of the totalizers (positive and negative flow

direction)

Limit R1 limit message (alarm output R1)

Impuls from abs(x) pulse without sign consideration

from x > 0 pulse for positive measured values

from x < 0 pulse for negative measured values

Miscellaneous c-Medium sound speed of the fluid

Signal signal amplitude of a measuring channel

VariAmp standard deviation of the signal amplitude

Pressure pressure of the fluid

Density density of the fluid

16.1.1 Output Range

When configuring an analog output, the output range will be defined now. Select a list item or other range to enter the output range manually.

UMFLUXUS_F4V1-3EN, 2017-07-17 93

If other range is selected, enter the values Output MIN and Output MAX. Press ENTER after each input.

This error message will be displayed if the output range is not min. 10 % of the max. output range. The next possible value will be displayed. Repeat the input.

- I

Example: I

MAX

≥ 2 mA for a 4…20 mA current output

MIN

Page 94

FLUXUS F401 16 Outputs

? ? ?

v [ m 3 / h ]

v [m3/h]

16.1.2 Error Value

In the following dialog, an error value can be defined which is to be transmitted if the source item cannot be measured, e.g., if there are gas bubbles in the fluid.

Tab. 16.2: Error output

error value results

Minimum output of the lower limit of the output range

Hold last value the last measured value is transmitted

Maximum output of the upper limit of the output range

Other value... The value has to be entered manually. It has to be within the

limits of the output.

Example: source item: volumetric flow rate

output: current output output range: 4…20 mA error value delay t

The volumetric flow rate cannot be measured during the time interval

...t1 (see Fig. 16.1). The error value will be transmitted.

(see section 16.2): > 0

Fig. 16.1: Error output

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16 Outputs FLUXUS F401

Error-value ↕ Minimum (4.0mA)

I [ m A ]

2 0

Error-value ↕ Hold last value

I [ m A ]

2 0

Error-value ↕ Maximum (20.0mA)

I [ m A ]

2 0

Error-value ↕ Other value...

I [ m A ]

2 0

Tab. 16.3: Examples for the error output

list item for the error output

output signal

error output = 2 mA

UMFLUXUS_F4V1-3EN, 2017-07-17 95

 

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FLUXUS F401 16 Outputs

Error-value ↕ Minimum (4.0mA)

Error-value

3.5 mA

I1 active loop Terminal: -D,C+

I1:Output Test

4mA

I1= 4.0 mA Again? no >YES<

B1:Output Test ↕ Opto-Relay OFF

B1=OFF Again? no >YES<

B1:Output Test ↕ Opto-Relay ON

Select a list item for the error output. Press ENTER.

If Other value is selected, enter an error value. It has to be within the limits of the output.

Press ENTER.

Note! The settings will be stored at the end of the dialog.

The terminals for the connection of the output are displayed (here: -D and C+ for the active current loop).

Press ENTER.

16.1.3 Function Test

The function of the installed output can now be tested. Connect a multimeter to the installed output.

Test of the Analog Outputs

The current output is tested in the display. Enter a test value. It has to be within the output range. Press ENTER.

If the multimeter displays the entered value, the output functions correctly.

Select yes to repeat the test, no to return to SYSTEM settings. Press ENTER.

Test of the Binary Outputs

Select Opto-Relay OFF or Open collect OFF in the scroll list Output Test to test the de-energized state of the output. Press ENTER. Measure the resistance at the output. The value has to be high ohmic.

Select yes. Press ENTER.

Select Opto-Relay ON or Open collect. ON in the scroll list Output Test to test the energized state of the output. Press ENTER. Measure the resistance at the output. The value has to be low ohmic.

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16 Outputs FLUXUS F401

B1=ON Again? no >YES<

Error-val. delay >DAMPING< edit

Error-val. delay

10 s

Current Loop I1: no >YES<

Meas.Values >ABSOLUT< sign

Zero-Scale Val.

0.00 m3/h

Select yes to repeat the test, no to return to SYSTEM settings. Press ENTER.

16.2 Error Value Delay

The error value delay is the time interval after which the entered value for the error value is transmitted to the output in case no valid measured values are available. The error value delay can be entered in the program branch Output Options if this menu item has previously been activated in the program branch Special Funct.. If the error value delay is not entered, the damping factor will be used.

Select Special Funct.\SYSTEM settings\ Dia- logs/Menus\Error-val. delay.

Select damping if the damping factor is to be used as the error value delay. Select edit to activate the menu item

Error-val. delay in the program branch Output Options.

From now on, the error value delay can be entered in the program branch Output Options.

16.3 Activation of an Analog Output

Note! An output can only be activated in the program branch Output

16.3.1 Measuring Range of the Analog Outputs

After an analog output has been activated in the program branch Output Options, the measuring range of the source item has to be entered.

UMFLUXUS_F4V1-3EN, 2017-07-17 97

Options if it has previously been installed.

Press ENTER until Current Loop is displayed. Select yes to activate the output. Press ENTER.

Select sign if the sign of the measured values is to be considered for the output.

Select absolut if the sign is not to be considered.

Enter the lowest expected measured value. The unit of measurement of the source item will be displayed.

Zero-Scale Val. is the measured value corresponding to the lower limit of the output range as defined in section

16.1.1.

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FLUXUS F401 16 Outputs

Full-Scale Val.

300.00 m3/h

I1: Test output ↕ no >YES<

I1: Test value =

150.00 m3/h

I1: Test output ↕ no >YES<

Enter the highest expected measured value.

Full-Scale Val. is the measured value corresponding to the upper limit of the output range as defined in section

16.1.1.

Example: output: current output

output range: 4…20 mA

Zero-Scale Val.: 0 m Full-Scale Val.: 300 m

volumetric flow rate = 0 m3/h, corresponds to 4 mA volumetric flow rate = 300 m

/h

/h, corresponds to 20 mA

16.3.2 Function Test

The function of the installed output can now be tested. Connect a multimeter to the installed output.

Select yes to test the output. Press ENTER.

Enter a test value for the selected physical quantity. If the multimeter displays the corresponding current value, the output functions correctly. Press ENTER.

Select yes to repeat the test. Press ENTER.

Example: output: current output

output range: 4…20 mA

Zero-Scale Val.: 0 m Full-Scale Val.: 300 m

/h

Test value = 150 m3/h (center of the measuring range, corresponds to 12 mA) If the multimeter displays 12 mA, the current output functions correctly.

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16 Outputs FLUXUS F401

Pulse Output B1: no >YES<

Pulse Output NO COUNTING !

Pulse Value

0.01 m3

Pulse Width

100 ms

Alarm Output no >YES<

16.4 Activation of a Binary Output as a Pulse Output

A pulse output is an integrating output which emits a pulse when the volume or the mass of the fluid which has passed the measuring point reaches a given value (Pulse Val- ue). The integrated quantity is the selected physical quantity. Integration is restarted as soon as a pulse is emitted.

Note! The menu item Pulse Output will only be indicated in the pro-

gram branch Output Options if a pulse output has been installed.

Select yes to activate the output. Press ENTER.

This error message will be displayed if the flow velocity is selected as the physical quantity.

The use of the pulse output is not possible in this case because integrating the flow velocity does not result in a reasonable value.

Enter the pulse value. The unit of measurement will be displayed according to the actual physical quantity.

When the counted physical quantity reaches the introduced pulse value, a pulse will be transmitted.

The max. flow that the pulse output can work with will be displayed now. This value is calculated on the basis of the entered pulse value and pulse width.

If the flow exceeds this value, the pulse output does not work correctly. In this case, the pulse value and the pulse width have to be adapted to the flow conditions. Press ENTER.

16.5 Activation of a Binary Output as an Alarm Output

Note! The menu item Alarm Output will only be displayed in the pro-

UMFLUXUS_F4V1-3EN, 2017-07-17 99

Enter the pulse width.

The range of possible pulse widths depends on the specification of the instrument (e.g., counter, PLC) that is to be connected to the output.

gram branch Output Options if an alarm output has been installed.

Select yes to activate the alarm output. Press ENTER.

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FLUXUS F401 16 Outputs

R1=FUNC<typ mode Function: MAX

16.5.1 Alarm Properties

The switching condition, the holding behavior and the switching function of an alarm output can be defined.

Three scroll lists will be displayed:

• func: switching condition

• typ: holding behavior

• mode: switching function

Press key to select a scroll list in the upper line. Press key to select a list item in the lower line.

Press ENTER to store the settings.

Tab. 16.4: Alarm properties

alarm property setting description

func

(switching condition)

typ

(holding behavior)

mode

(switching function)

MAX The alarm will switch if the measured value

exceeds the upper limit.

MIN The alarm will switch if the measured value

falls below the lower limit.

+→- -→+ The alarm will switch if the flow direction

changes (sign change of measured value).

QUANT. The alarm will switch if totalizing is activat-

ed and the totalizer reaches the limit.

ERROR The alarm will switch if a measurement is

not possible.

OFF The alarm is switched off.

NON-HOLD If the switching condition is no longer true,

the alarm will return to the idle state after approx. 1 s.

HOLD The alarm remains activated even if the

switching condition is no longer true.

NO Cont. The alarm is energized if the switching

condition is true and de-energized if idle.

NC Cont. The alarm is de-energized if the switching

condition is true and energized if idle.

Note! If no measurement is made, all alarms will be de-energized, inde-

pendently of the programmed switching function.

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