Micronics UF3300FM User manual

Issue 1.1
UF3300
UF3300FM: Wall-Mounted Ultrasonic Flow Meter
UF3300HM: Wall-Mounted Ultrasonic Heat Meter
User Manual
British Rototherm Company LTD.
Kenfig Industrial Estate, Margam, Port Talbot, SA13 2PW
United Kingdom
Telephone: [phone] E-mail: [e-mail]
www.micronicsflowmeters.com

Micronics UF3300 User Manual
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Issue 1.1 November 2021 Page 1
CONTENTS
1INTRODUCTION ..................................................................................................................................................4
1.1 General Description ............................................................................................................ 4
1.2 How Does It Work?............................................................................................................. 5
1.2.1 Reflex (V) Mode........................................................................................................... 7
1.2.2 Double Reflex (W) Mode ............................................................................................. 7
1.2.3 Triple Reflex (WV) Mode ............................................................................................. 7
1.2.4 Quadruple Reflex (WW) Mode..................................................................................... 7
1.2.5 Diagonal Mode ............................................................................................................ 7
1.3 Package Contents .............................................................................................................. 8
1.4 Display and Connectors...................................................................................................... 9
1.5 Keypad ............................................................................................................................. 11
1.5.1 Dual Function Numerical Keypad............................................................................... 11
1.5.2 Menus and the Menu Selection Keys......................................................................... 12
2INSTALLATION...................................................................................................................................................14
2.1 Positioning........................................................................................................................ 14
2.2 Mounting........................................................................................................................... 14
2.3 Connections...................................................................................................................... 15
2.3.1 RTD connections (Heat meter only)........................................................................... 16
2.3.2 Power Supply ............................................................................................................ 17
2.3.3 Control & monitoring cables....................................................................................... 18
2.3.4 USB Connector.......................................................................................................... 19
2.4 Positioning the Transducers ............................................................................................. 20
2.5 Attaching the Transducers ................................................................................................ 21
2.5.1 Cleaning the Contact Area......................................................................................... 21
2.5.2 Attaching the Guide Rail to the Pipe .......................................................................... 21
2.5.3 Fitting the Transducers .............................................................................................. 22
2.5.4 Fixing Transducers in Diagonal Mode........................................................................ 25
2.6 Connecting Temperature Probes (UF3300 HM Models Only) ........................................... 27
2.7 Calibrate the PT100 Sensors (Heat Meter versions only).................................................. 28
2.8 Attach the PT100 Sensors (Heat Meter versions only)...................................................... 28
2.9 Switching on for the First Time.......................................................................................... 29
2.9.1 Checking System Health ........................................................................................... 29
2.9.2 Selecting a Language................................................................................................ 29
2.9.3 Setting the Date & Time............................................................................................. 30
2.9.4 Enabling/Disabling the Backlight................................................................................ 30
2.9.5 Enabling/Disabling Audible Keypress ........................................................................ 31
3USING THE QUICK START MENU ....................................................................................................................32
3.1 Entering the Site Data....................................................................................................... 32
3.2 Attaching and Connecting the Flow Sensors..................................................................... 34
3.3 Taking a Flow Reading ..................................................................................................... 34
3.4 Flow / Energy / Velocity Monitoring................................................................................... 35
3.5 Total Flows ....................................................................................................................... 35

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3.5.1 Calculating the Average Flow or Power ..................................................................... 36
3.5.2 Resetting Totals......................................................................................................... 36
4MANAGING NAMED SITES...............................................................................................................................37
4.1 View/Edit Site Data........................................................................................................... 37
4.2 Selecting an Existing Site ................................................................................................. 38
4.3 Adding a New Site ............................................................................................................ 39
4.4 Changing a Site Name...................................................................................................... 39
4.5 Editing Site Data............................................................................................................... 40
4.6 Changing Calibration Parameters..................................................................................... 41
4.6.1 Adjusting the Zero Cutoff ........................................................................................... 41
4.6.2 Adjusting the Zero-Flow Offset (ZFO) ........................................................................ 41
4.6.3 Adjusting the Calibration Factor................................................................................. 42
4.6.4 Adjusting the Roughness Factor................................................................................ 44
4.6.5 Adjusting the Damping Factor.................................................................................... 45
5LOGGING FUNCTIONS......................................................................................................................................46
5.1 Manual Logging ................................................................................................................ 46
5.2 Scheduling Logging .......................................................................................................... 46
5.3 Stopping Logging.............................................................................................................. 47
5.4 Copying Logged Data to a USB Memory Stick.................................................................. 47
5.5 Clearing Log Files............................................................................................................. 48
5.6 Logger Status ................................................................................................................... 48
6OUTPUTS ..........................................................................................................................................................49
6.1 Current Loop Setup .......................................................................................................... 49
6.1.1 Example .................................................................................................................... 50
6.1.2 Converting the Measured Current to Flow Rate ......................................................... 51
6.2 Digital Outputs .................................................................................................................. 52
6.2.1 Pulse Output.............................................................................................................. 53
6.2.2 Alarm Output ............................................................................................................. 56
6.2.3 Frequency Output...................................................................................................... 58
7HEAT METER.....................................................................................................................................................59
7.1 Calibrate Temperature Sensors........................................................................................ 59
8PRIMARY FLOW................................................................................................................................................60
9MAINTENANCE AND REPAIR............................................................................................................................61
10 TROUBLESHOOTING.........................................................................................................................................62
10.1 Overview .......................................................................................................................... 62
10.2 General Troubleshooting Procedure ................................................................................. 63
10.3 Warning and Status Messages ......................................................................................... 64
10.3.1 Flow Rate Errors & Messages ................................................................................... 64
10.3.2 Heat Meter Errors & Messages.................................................................................. 65

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10.3.3 Current Loop and Digital Output Errors & Messages ................................................. 65
10.3.4 Data Logging Errors & Messages .............................................................................. 66
10.3.5 Set-up and Other Errors & Messages ........................................................................ 68
10.4 Diagnostics....................................................................................................................... 70
10.4.1 Advanced Diagnostics ............................................................................................... 71
11 APPENDIX.........................................................................................................................................................72
11.1 Specification ..................................................................................................................... 72
11.2 Declaration of Conformity ................................................................................................. 75

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1INTRODUCTION
1.1 General Description
The UF3300 is a wall-mounted flow meter (and heat meter depending on configuration options) that
uses clamp-on transducers to enable the flow of a liquid within a closed pipe to be measured
accurately without needing to insert any mechanical parts through the pipe wall or protrude into the
flow system.
Using ultrasonic transit time techniques, the UF3300 is controlled by a micro-processor system
which contains a wide range of data that enables it to be used with pipes with an outside diameter
ranging from 13mm up to 2000mm (depending on configuration) and constructed of a wide range of
materials. The instrument will also operate over a wide range of fluid temperatures.
The UF3300 has the following standard features:
•Large, easy to read graphic display with backlighting.
•Simple to follow dual function keypad.
•Easy to follow ‘Quick Start’ set up procedure.
•Continuous signal monitoring.
•Three isolated switched outputs for use in any combination as a:
oPulse output (on volume or 1energy),
oFrequency output (on flow or 1power), or
oAlarm output (on flow, volume, 1power, 1energy, flow signal).
•Current output with a selectable range between 0 and 24mA including support for an alarm
current.
•Diagnostics.
Volumetric flow rates are displayed in l/s, l/min, l/h, m³/s, m³/min, m³/h, Ml/s, Ml/min, Ml/hr, Ml/day,
USgals/sec, USgals/min, USgals/h, USgals/day, Barrel/h, Barrel/day, ft3/sec, ft3/min, ft3/hr,
MUSgal/hr), MUSgal/day, Imp Gals/sec, Imp. Gal/m, Imp Gals/hr, Imp Gals/day, Barrels/hr,
Barrels/day. Linear velocity is displayed in metres or feet per second. When operating in the ‘Flow
Reading’ mode, the total volumes, both positive and negative, are displayed up to a maximum 12-
digit number.
The flowmeter can be used to measure clean liquids that have less than 3% by volume of
particulate content. Cloudy liquids such as river water and effluent can be measured along with
cleaner liquids such as demineralised water.
1On models with a heat-meter

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Typical applications:
•River water
•Seawater
•Potable water
•Demineralised water
•Treated water
1.2 How Does It Work?
The UF3300 flow meter uses a cross correlation transit time algorithm to provide accurate flow
measurements.
An ultrasonic beam of a given frequency is generated by applying a repetitive voltage pulse to the
transducer crystals. This transmission goes first from the downstream transducer to the upstream
transducer as shown in the upper half of Figure 1. The transmission is then made in the reverse
direction, being sent from the upstream transducer to the downstream transducer as shown in the
lower half of Figure 1. The speed at which the ultrasound is transmitted through the liquid is
accelerated or decelerated slightly by the velocity of the liquid through the pipe. The subsequent
time difference T1 –T2 is directly proportional to the liquid flow velocity.
Figure 1 Principle of operation
The UF3300 system can be set up to operate in one of five modes determined mainly by the pipe
diameter and the type of transducer set in use. Figure 2 illustrates the importance of applying the
correct separation distance between the transducers to obtain the strongest signal.

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Figure 2 Operating modes
Reflex (V) Mode
(single bounce)
Reflex (W) Mode
(double bounce)
Reflex (WV) Mode
(triple bounce)
Reflex (WW) Mode
(quadruple bounce)
Diagonal Mode

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1.2.1 Reflex (V) Mode
This is the mode most commonly used. The two transducers (U & D) are attached to the pipe in line
with each other and the signals passing between them are reflected by the opposite pipe wall.
The separation distance is calculated by the instrument in response to entered data concerning the
pipe and fluid characteristics.
1.2.2 Double Reflex (W) Mode
In this mode the separation distance is calculated to give a double bounce2. This is most likely to
occur if the pipe diameter is small and the calculated reflex mode separation distance would be
impractical for the transducers in use.
1.2.3 Triple Reflex (WV) Mode
This mode goes one step further to detect a triple bounce2. This would normally be used when
working with very small pipes relative to the transducer in use.
1.2.4 Quadruple Reflex (WW) Mode
This mode goes one step further again, to use a quadruple bounce2. Again, this would normally be
used when working with very small pipes relative to the transducer in use.
1.2.5 Diagonal Mode
This mode might be selected by the instrument where relatively large pipes are concerned. In this
mode the transducers are located on opposite sides of the pipe, but the separation distance is still
critical in order for the signals to be received correctly.
This mode might be used with the standard ‘A’ & ‘B’ transducer sets but for very large pipes
installation the optional transducer set ‘D’ might be recommended.
2In general, it should be noted that errors accumulate as the number of bounces increase. Units are
calibrated using single reflex mode. Any inherent inaccuracy will be amplified by using higher order
modes such as triple and quadruple bounce. In addition to this, as the path length is longer, the
signal will also be more attenuated with higher order operating modes. Attenuation is also greater
with sensors using higher operating frequencies. (E.g. Signals from A sensors will be more
attenuated than with B sensors.)

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1.3 Package Contents
The unit consists of the following components:
1. UF3300 electronics unit
Incorporating keypad and backlit display.
2. Transducer cables x 2, (2m)
3. Guide rail (optional second rail for diagonal configuration)
For use with A or B type transducers
4. Stainless steel bands x 4 (larger sizes available)
5. Transducer set 'B' : for use on pipes 50mm to 2000mm outside diameter, or
Transducers set 'A': for use on pipes 13mm to 115mm outside diameter.
Supplied with heat meter versions only:
6. RTD PT100 temperature sensors with clamps (not shown)
The package also contains two syringes with ultrasonic couplant for standard and high temperature
applications, and a copy of this manual (not shown).
Figure 3 Package Contents
1
2
5
4
3
6

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1.4 Display and Connectors
The UF3300 unit is microprocessor-controlled, operated through a menu system using an inbuilt
LCD display and keypad. It can display the instantaneous fluid flow rate or velocity, together with
totalised values.
The instrument can also provide a variable current or variable ‘pulse’ (volumetric, energy, or flow
frequency) output that is proportional to the detected flow rate. In addition to this, the instrument can
also be used to signal alarm conditions such as flow too high, too low or a volume being exceeded.
This output can be calibrated to suit a particular flow range and used with a range of external
interface devices, such as those found in BMS or site monitoring systems. The three isolated
outputs provided can be configured as required in any order and with any functionality as just
mentioned.
Heat meter versions of the UF3300 can be used to measure energy and power. They are supplied
with RTD probes which, when properly placed, can be used to calculate energy lost or absorbed in
a heater or chiller circuit. It does this by measuring the difference in temperature between the
probes, which are usually placed on the flow and return pipes at the point of source. The unit is
calibrated for ordinary water but is also capable of making an estimate when the system contains a
proportion of glycol3.
Obviously, since this method of energy calculation relies on measuring the temperature on the
outside of the pipe, the assumption made is that the temperature drop between the fluid and the
outside wall is the same at both measurement points. With careful selection of measurement points
on pipes whose wall and lining are good thermal conductors, a reasonable degree of accuracy in
the measurement of the temperature differential is possible, however with pipe materials that are
poor thermal conductors (e.g. plastic, epoxy etc.) it is recommended that PT100 pocket sensors be
used instead. With the careful choice of sensor type and installation method, it may be possible to
install these sensors without having to interrupt flow.
3The proportions of water glycol are selected when choosing Fluid Type. The assumption is that the type of
glycol is ethylene (C2H6O2) with a Specific Heat Capacity (SHC) of 3.77kJ/kg⁰K, and a Relative Density (RD)
of 1.05 @25⁰C.
It has also been found that the SHC of ethylene glycol-based additives varies significantly by brand. For this
reason, and because the exact proportion and type of glycol being used are often not known, the energy
values obtained when using a glycol/water mix should be considered at best, only an estimate.
The SHC and RD for other fluid types should also be considered approximate. Published data for these other
fluids often varies significantly and is dependent on many factors that are outside the scope of this instrument
to compensate for.

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UF3300 units can also act as a data logger (requires data logger option). When operating in the
data logger mode, data is saved to non-volatile internal storage. This data may be downloaded at a
later date via a flash drive inserted in the USB socket. Data is saved as text in a CSV file which may
then be loaded directly into a program such as Microsoft™Excel™. The internal storage capacity is
8GB.
Figure 4 UF3300 Front View
Terminal block cover
Transducer cable
connectors
RTD PT100/
output cable
glands
Power cable
glands
LCD display
Cover latch
Keypad
Note: USB
socket on left
side

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1.5 Keypad
The instrument is configured and controlled via a 15-key tactile membrane keypad, as shown in
Figure 5.
Figure 5 UF3300 keypad
1.5.1 Dual Function Numerical Keypad
The block of keys shown in the centre of the keypad in Figure 5 are dual function keys. They can be
used to enter straight-forward numerical data within menus or provide quick access to frequently
used menus or commands from the Read Flow/Velocity/Energy display screens. There is a
distinction between short key presses (< 1.5 seconds) and long key presses (≥ 1.5 seconds). All key
press operations in this document are short key presses unless otherwise stated.
NOTE: DEPENDING ON THE INSTALLED OPTIONS, SOME OF THE FEATURES ACCESSED
BY THESE KEYS MAY BE UNAVAILABLE.
Key
Use
0
Circulate between flow, velocity and optionally energy screens (via a short press
when reading flow, energy or velocity), enter the zero-flow setting screen (long press
when reading flow), or freeze and un-freeze diagnostic values in the Diagnostic
screen
1
Display the Logger menu (see page 46)
2
Display the System Settings menu (see page 29)
3
Display the Output Board Setup menu (see page 49)
4
Switch to the Read Velocity display from the Read Flow display or Read Energy
display
(Heat Meter versions only)
5
No function - reserved for future use
Scroll
down
Numerical keypad with
dual function keys
Scroll up
ENTER
(SELECT)

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Key
Use
6
No function - reserved for future use
7
Cycle through the available display units
8
Switch to the Read Flow display from the Read Velocity display or Read Energy
display
(Heat Meter versions only)
9
Heat Meter versions only: switch to the Read Energy display from the Read
Velocity display or Read Flow display
Delete
+/-
No shortcut function: within text entries, deletes character to left of flashing cursor.
Deletes alarms when activated, or return to the MAIN MENU from the Summary
screen
Diags
.
Display the Diagnostics screen (see page 70)
Numeric Entry
Entry of numeric values is straightforward using the digits, decimal point and +/- keys. Press the +/-
key as the first character to enter a negative value. Pressing it again will change the sign again.
Then enter the number desired using the digits keys. The decimal place is optional, but not if you
are entering a value containing an exponent. The first press of the decimal point will result in a ‘.’.
The second press will result in an ‘E’. Press ENTER to terminate entry and fix the value.
An example of exponential notation follows:
1. Enter the number using digits and the mandatory decimal point
(for example, 1 must be entered as 1.0).
2. Add another decimal point at the place where you wish the exponent to appear.
3. Add the exponent as a number.
For example, using this technique, 101000 (1.01×105) would be entered as the sequence “1.01.5”
and this would appear as 101000 l/min.
1.5.2 Menus and the Menu Selection Keys
To navigate the UF3300’s menu system, use the three keys on the right-hand side of the keypad:
1. Use the UP & DOWN arrow keys to scroll through a menu list and select a menu item, as
indicated by an arrow-shaped cursor on the left-hand side of the screen.
2. Edit or open the active menu choice by pressing the ENTER key.
3. Use the UP and DOWN arrow keys to cycle through the available options or, for numerical
settings, use the keypad to enter the required value.
4. Press the ENTER key to confirm the new setting.

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Some menus have more options than can be shown on the screen at the same time, in which case
the ‘overflowed’ choices can be brought into view by continuing to scroll beyond the lowest visible
item.
Menus generally ‘loop around’ if you scroll beyond the first or last items. Sometimes, this is the
quickest route to find the Exit command to close a menu.
If you select Exit on any menu it usually takes you back up one level in the menu hierarchy, but in
some cases, it may go directly to the Read Flow screen.
Menu items ending with “..” generally indicate that selection of this item will take you to another
screen.
UF3300 MAIN 26-02-20 13:45:42
Quick start..
View / Edit Site Data..
Setup Instrument..
Data Logger..
Read Flow..
Read Energy..
Figure 6 Main menu
(Read Energy and Data Logger options available with heat meter versions only)

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2INSTALLATION
2.1 Positioning
The UF3300 instrument should be installed as close as conveniently possible to the pipe-mounted
ultrasonic sensors. Standard transducer cables are 5 metres in length with 10 metre cables being
optionally available. Where, for operational reasons, it is not possible to mount the instrument this
close to the sensors, bespoke cables of up to 100m can be provided –consult Micronics Ltd for
further information and availability.
A suitable mains supply must be available to power the instrument (an optional 24V AC/DC. supply
module is available). The external supply must be suitably protected and connected via an
identifiable isolator. A 500mA fuse is fitted internally in the instrument’s input supply line.
2.2 Mounting
Ideally the UF3300 enclosure should be fixed to a wall using three M4 screws.
1. Remove the UF3300 terminal cover.
2. Fix a screw into the wall at the required point to align with the mounting keyhole on the back of
the enclosure.
3. Attach the enclosure to the wall using the keyhole screw mounting.
4. Align the enclosure (see Figure 7) then mark out the positions for the two remaining screw
fixings through the slots near the bottom corners of the enclosure. Then remove the enclosure,
and drill (and plug) the fixing points.
5. Clear the site of any dust/debris then mount the enclosure on the wall.
Figure 7 UF3300 mounting dimensions
M4 keyhole
198mm
141mm

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2.3 Connections
This section explains how to connect power and signal cables to the terminal blocks inside the wall
mount unit.
The transducer cables attach to sockets on the left side of the terminal block. Other cables enter the
instrument through the four cable glands provided and are connected to terminal blocks which are
located behind a safety cover (Figure 8).
To make power, PT100 and output connections:
1. Remove the terminal block cover by unfastening the two retaining screws.
2. Route the control and monitoring cables through the two smaller cable glands.
3. On completion, tighten the cable glands to ensure the cables are held securely.
4. Refit the terminal block cover.
Figure 8 Terminal blocks
12-30 VDC
24 VAC PSU
V+ V-
Optional
GND 1
AIN1 -
RTD1 +
AIN1 +
GND 2
AIN2 -
RTD1 +
AIN2 +

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2.3.1 RTD connections (Heat meter only)
GND 2
AIN2 -
RTD2 +
AIN2 +
GND 1
AIN1 -
RTD1 +
AIN1 +