Sonic Driver Modbus-UFM Manuale utente

Made in Britain

MODBUS WALL-UFM Ultrasonic Flowmeter

Operating Instructions

Version 1.0

5th August 2022

Contents

1.0 Introduction

1.1 General Precautions

2.0 Configuration Program Functionality

2.1 Quick Start

2.1.1 Transducer Type

2.1.2 Number of Passes (Transducer Mounting)

2.1.3 Pipe Material

2.1.4 Pipe Outer Diameter

2.1.5 Pipe Wall Thickness

2.1.6 Pipe Roughness

2.1.7 Fluid Type

2.1.8 Fluid Temperature

2.1.9 Min Flow Cutoff

2.1.10 Flow Damping

2.2 Display of Ultrasonic Signal, Transducer Positioning

2.3 Display of Measurements

2.4 Display of Diagnostics

2.4.1 Signal Based Diagnostics

2.4.2 Time Based Diagnostics

2.4.3 Profile K

2.4.4 Reynolds

2.4.5 Transducer Spacing

2.4.6ATA/ETA

2.4.7 Error Code

2.5 Display of Internal values

3.0 Zero Tracking and Calibration

3.1 Zero Tracking

3.2 Set Zero Calibration

4.0 Powering On

5.0 Input/Output

5.1 PT100 Input

5.2 Current Output 4-20mA

5.3Alarm Relay Output

6.0 Heat Metering

7.0 Communications Software

Appendix A Error codes

1.0 Introduction

Congratulations on choosing the Sonic DriverTM MODBUS WALL-UFM wall or panel mounted

clamp-on ultrasonic flowmeter, figure(1).

Figure(1) The Sonic Driver MODBUS WALL-UFM.

The ultrasonic flowmeter (UFM) uses advanced Digital Signal Processing (DSP) and transit time

measurement techniques (Sonic Driver TM) to make accurate and reliable clamp-on ultrasonic flow

velocity measurements on liquids flowing in closed pipes

Using information about the installation, entered by the user, using the meter’s PC based

Configuration program (Windows) the UFM can calculate;

•Flow velocity (m/s)

•Volumetric flow rate (l/min)

•Mass flow rate (kg/min)

•Heat quantity flow rate (KJ/s)

When making heat measurements the UFM is designed to comply with EN1434-1 section 8 and its

Appendix A.

In order to make heat measurements it is necessary to fit optional plug-in PT100 modules to

measure inlet and outlet temperatures on heating or chilling systems.

All of the above flow measurements and a complete set of diagnostics are available over Modbus

RTU RS485.

For installation a PC is connected to the UFM via a bidirectional USB/RS485 converter.

All installation parameters are available for editing over Modbus RTU.

Once installed the PC and converter can be disconnected and the UFM connected to a Modbus RTU

RS485 network and back to a control room or Cloud based monitoring applications where a

Modbus Master polls the UFM Slave.

1.1 General Precautions

The content of this manual has been carefully checked and is believed to be accurate.

Sonic Driver Ltd assumes no responsibility for any inaccuracies that may be contained in this

manual.

In no event will Sonic Driver be liable for direct, indirect, special, incidental or consequential

damages resulting from any defect or omission in this manual, even if we are advised of the

possibility of such damages.

Sonic Driver Ltd reserves the right to make improvements to its manuals, instructions and products

at any time, without notice or obligation. The latest revisions may be found on the company web

site, www.sonic-driver.com

The UFM is a precision measuring instrument and should be handled and operated with care;

•Before operating the UFM for the first time read the installation manual and operating

instruction fully.

•Further detail on connecting and using the UFM on a Modus RTU network are available in

Modbus WALL Ultrasonic Flowmeter Modbus RTU Slave Meter, Operating Instructions,

including a full register map.

•Only use the UFM in the way and for the purpose that it is intended.

•Do not subject the UFM to bumps and shocks such as caused by dropping the UFM.

•Keep the UFM and its transducers and probes clean.

•Only use the UFM within its ambient temperature and stated level of Ingress Protection.

•Avoid excessive stress and bending of transducer cables and connectors.

2.0 Configuration Program Functionality

The UFM is installed and commissioned using the Configuration Program installed and running on

a PC (Windows).

Read the Installation manual for instructions on installing the Configuration program.

The Configuration program is basically a dashboard, see figure(2) which includes sections for;

•Quick Start

•Display of Ultrasonic Signal, Transducer Positioning

•Display of Measurements

•Display of Diagnostics

•Display of Internal Values

Figure(2) Configuration Program Dashboard.

2.1 Quick Start

This section, on the left-hand side of the dashboard, takes the user through a sequence of

configuring the basic parameters necessary to get the UFM measuring reliably and accurately, see

figure(3).

Figure(3) Quick Start Section.

Parameters and settings in the UFM can be edited by;

•Selecting an item using a scrolling list

•Ticking a Tick Box

•Direct numerical entry

It is important to note that after direct numerical entry of a parameter value it is important to press

the named button next to the entry for it to be checked against limits, entered and saved.

If the value entered it not within limits, then the entry is rejected

After entering the required Quick Start parameters, the spacing between the transducers is

calculated and displayed. Check the value displayed in the diagnostics section and space the

transducers accordingly, read the Installation manual for instructions on mounting the transducers.

2.1.1 Transducer Type

The user is prompted to select the type of sensors mounted on the pipe from a list;

•DN40

•DM10(Default)

•DM20

DM sensors are Sonic Driver standard PEEK/stainless steel design. DN sensors are Sonic Driver

small pipe design.

2.1.2 Number of Passes (Transducer Mounting)

The user is prompted to select the sound path in the pipe from a list;

•Z

•V

•N

•W

•5

•6

•7

•8

•9

•10

•11

•12

•13

•14

•15

•16

Ideally choose a number of passes that results in a path length in the fluid of 100mm or greater.

•Z is 1 pass, most common on large diameter pipes.

•V is 2 passes, the most commonly used method, simplest to install as both sensors are on

the same side of the pipe.

•N is 3 passes, used on small diameter pipes.

•W is 4 passes, used on the lowest diameter pipes.

•5 to 15 and 16, etc.

It may be that on small diameter pipes then the recommended transducer spacing at 16 passes is not

sufficient to allow the transducers to be coupled on the same side of the pipe, an even number of

passes as they touch. In this case it is unavoidable to couple the transducers on opposite sides of the

pipe using an odd number of passes, for example 13 or 15 passes.

2.1.3 Pipe Material

The user can select the pipe material from a list;

•Carbon Steel (Default)

•Stainless Steel

•Copper

•PVC

The transverse speed of sound in the pipe material is read from a database held in the UFM.

2.1.4 Pipe Outer Diameter

The user is prompted to enter a value for the pipe outer diameter. Allowed values are ranged 10.0 to

115.0mm, default 60.6mm.

2.1.5 Pipe Wall Thickness

The user is prompted to enter a value for the pipe wall thickness.Allowed values are ranged 0.5 to

100.0mm, default 3.2mm.

2.1.6 Pipe Roughness

The user is prompted to enter a value for the peak/trough height of the roughness on the inside

surface of the pipe. Allowed values are ranged 0.001 to 10.000mm, default 0.010mm.

This value is used in flow profile correction calculations.

2.1.7 Fluid Type

The user can select the fluid in the pipe from a list;

•Water (Default)

•Petrol

•Diesel

•Glycol/Water

2.1.8 Fluid Temperature

The user is prompted to enter the temperature of the fluid in the pipe.Allowed values are ranged -20

to +150 degC, default 18 degC.

Changing Fluid Temperature causes Fluid Sound Velocity, Fluid Kinematic Viscosity and Fluid

Density to be recalculated.

2.1.9 Min Flow Cutoff

If the flow velocity falls below the low flow cutoff value, the measured flow velocity and calculated

flow rate indication is driven to zero. This function can prevent the flow meter from reading flow

after a pump is shut down but there is still circulating liquid creating movement in the pipe.

Generally, 0.025m/s is recommended as the low flow cutoff point. The low flow cutoff value has no

relation to the measurement results once the velocity increases over the low flow cutoff value.

The user is prompted to enter a value in m/s below which the meter reports flow as zero.Allowed

values are ranged 0.000 to 1.000m/s, default 0.025m/s.

Note. This absolute value is applied to both positive and negative flow as a +/- band either side

of zero.

2.1.10 Flow Damping

The user is prompted to enter a display damping or averaging time.

Allowed values are ranged 1 to 255 seconds, the default is 10 seconds.

The damping time can be adjusted to stabilise the flow value being displayed. Essentially, it is a

type of signal filter applying an RC time constant.

Increasing the damping increases the stability. However, the measurement displayed can be slightly

delayed due to over damping. Too much damping may also result in no response to real time

fluctuations, especially when flow rate fluctuates wildly.

Therefore, damping should be kept at a minimum and increased just enough to reduce the

fluctuation to an acceptable degree.

Once the installation configuration has been set press the Write Meter Settings button, see figure(4).

Figure(4) Write Meter Settings

To read a previously configured UFM configuration press the Read Meter Settings button.

2.2 Display of Ultrasonic Signal, Transducer Positioning

This section displays the received ultrasonic signal to aid transducer mounting and allows coupling

optimization, see figure(5).

Figure(5) Ultrasonic Signal, Transducer Positioning.

To make a flow measurement and update this display press Read Meter Settings.

The configuration program reads and displays the ultrasonic signal being measured. The first arrival

of the signal should appear in the blue square, the green line indicates where the UFM has

determined the first arrival to be. If the UFM is not confident then this line will be red.

Flow measurement and diagnostics are shown in the relevant sections on the dashboard.

Given the parameter values entered the UFM displays the required spacing for the transducers

clamped on the pipe in the diagnostics listing.

Below the scope trace is a progress bar which shows the progress of data and parameter value

download.

2.3 Display of Measurements

This section, see figure(6) below, displays;

•Flow velocity (m/s)

•Flow rate (l/min)

•Mass flow rate (kg/min)

•Heat flow rate (KJ/s)

•Inlet temperature (degC)

•Outlet temperature (degC)

These values are averaged and have flow profile compensation and minimum flow cut off

applied.

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