Dwyer Instruments UFC Series User manual

Series UFC Ultrasonic Flowmeter Kit
Installation and Operating Instructions
Bulletin F-UFC
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Table of Contents
1: General Description 1
1.1 Introduction 1
1.2 Principles of Operation 2
1.3 Supplied Hardware 3
1.4 UFC Instrument 4
1.4.1 Connections 4
1.4.2 Keypad 5
1.4.3 Power supply 6
2: Installation 7
2.1 Safety Precautions and Warnings 7
2.2 Installing the UFC Instrument 7
2.2.1 Positioning the instrument 7
2.2.2 Mounting the instrument 8
2.2.3 Connecting the instrument 9
2.3 Installing the Ultrasonic Transducers 10
2.3.1 Transducer positioning 10
2.3.2 Transducer attachment 11
2.3.3 Attaching the guide rail to the pipe 12
2.3.4 Fitting the transducers 12
2.3.5 Transducer attachment (diagonal mode) 15
3: Operating Procedures 17
3.1 Setting-up the Instrument 18
3.1.1 Using the instrument for the first time 18
3.1.2 Changing the user language 19
3.1.3 Changing the date and time 19
3.2 Using the Quick Start Menu 19
3.3 Instrument Calibration 23
3.3.1 Adjusting the zero cut-off 23
3.3.2 Adjusting the set zero flow offset 23
3.3.3 Adjusting the calibration factor 24
3.3.4 Adjusting the roughness factor 26
3.3.5 Adjusting the damping factor 26
3.4 Outputs 28
3.4.1 Current output 28
3.4.2 Pulse output 30
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3.4.3 Alarm outputs 31
3.5 How to Measure Totalized Flows (manually) 34
3.6 Display of totalizers 35
3.7 Operation with an Energy Meter 35
3.7.1 Pulse output 35
3.7.2 Configuring the UFC 35
4: Data Logging 37
4.1 How to Set Up the Basic Logging Application to Memory 37
4.2 How to Set Up Automatic (Timed) Logging Mode 39
4.3 How to Download Logged Data 40
5: Maintenance & Repair 42
5.1 Introduction 42
5.2 General care 42
5.3 Warranty / Return 42
6: Troubleshooting 43
6.1 Overview 43
6.2 General Troubleshooting Procedure 44
6.3 Warning and Status Messages 45
6.4 Diagnostics Display 47
7: Options 49
7.1 Large Pipe Diameter Transducers 49
7.2 Transducer Holder Options 49
7.3 Extended Signal Cable Options 49
8: Specification 50
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1: General Description
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1: General Description
1.1 Introduction
This manual describes the operation of the Dwyer UFC flowmeter. The flowmeter is designed to work with 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 UFC is controlled by a micro-processor system which contains a
wide range of data that enables it to be used with pipes having an outside diameter ranging from 0.5 to 79 inches
(13 to 2000 mm) and constructed of almost any material. This can be extended to pipes of up to 197 inches (5000
mm) using the optional type D sensors. The instrument will also operate over a wide range of fluid temperatures.
UFC standard features:
•Large, easy to read graphic display with backlight.
•Simple to follow, dual function keypad.
•Simple ‘Quick Start’ set up procedure.
•Continuous signal monitoring.
•Isolated pulse output (volumetric or frequency).
•Isolated current output (4 to 20 mA, 0 to 20 mA, or 0 to 16 mA).
•2x Isolated programmable alarm outputs.
•Password-protected menu operation for secure use.
•Signal diagnostics.
•Multi-function alarm outputs.
•Operates from Mains, 24 Vac, or 24 Vdc.
•Logging of Flows and Volume total.
•Output to USB pen
Volumetric flow rates are displayed in L/h, L/min, L/sec, gal/min, gal/h, USgals/min, USgals/h, Barrel/h, Barrel/
day, m³/s, m³/min, m³/h. Linear velocity is displayed in meters 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 or oils 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
demineralized water. In addition, the UFC can function as a data logger. When operating in this mode the logged
data, which includes the flow rates and totalizers, is stored in memory and can then be transferred to a USB
memory stick.
Typical UFC applications include:
•Sea or River water.
•Potable water.
•Demineralized water.
•Treated water.
The UFC is available in two model options. Model UFC-A is supplied with type ‘A’ transducers which are designed
to work with pipe diameters between 0.5 to 4.5 inches (13 to 115 mm). Model UFC-B is supplied with type ‘B’
transducers which are designed to work with pipe diameters between 2 to 79 inches (50 to 2000 mm). Both sets
of transducers use a common mounting system for pipe attachment, and throughout this manual any reference to
‘UFC’ applies to both ‘A’ and ‘B’ model variants unless otherwise stated.
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1: General Description
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Note: In addition to the 'A' and 'B' type sensors, type 'D' sensors (option) are available for use on pipes up to 197
inches (5000 mm). These sensors have a different mounting method. See Paragraph 1.3 for further details.
1.2 Principles of Operation
Figure 1.1 Operating modes
When ultrasound is transmitted through a liquid, the speed at which the sound travels through the liquid is
accelerated slightly if it is transmitted in the same direction as the liquid flow, and decelerated slightly if
transmitted against it. The difference in time taken by the sound to travel the same distance but in opposite
directions is therefore directly proportional to the flow velocity of the liquid.
The UFC system employs two ultrasonic transducers attached to the pipe carrying the liquid and compares the
time taken to transmit an ultrasound signal in each direction. If the sound characteristics of the fluid are known,
Fluid flow
Fluid flow
Fluid flow
Fluid flow
Fluid flow
U
U
U
U
D
D
D
D
Separation
Distance
Separation
Distance
Separation
Distance
Separation
Distance
Reflex mode
Reflex mode (double bounce)
Reflex mode (triple bounce)
Diagonal 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.
In this mode the separation distance is
calculated to give a double bounce. This is
most likely to occur if the pipe diameter is
so small that the calculated reflex mode
separation distance would be impractical
for the transducers in use.
This illustration goes one step further to show
a triple bounce situation. This would normally
apply when working with very small pipes
relative to the transducer range in use.
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 can be used with the standard
‘A’ & ‘B’ transducer sets but for really large
pipe installations the optional transducer set ‘D’
might be recommended.
Upstream
transducer
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1: General Description
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the instrument’s microprocessor can use the results of the transit time calculations to compute the fluid flow
velocity. Once the flow velocity is known the volumetric flow can be easily calculated for a given pipe diameter.
The system can be set up to operate in one of four modes, determined mainly by the pipe diameter and the type
of transducer set in use. The diagram in Figure 1.1 illustrates the importance of applying the correct separation
distance between the transducers to obtain the strongest, and therefore most reliable, signal.
1.3 Supplied Hardware
The supplied UFC components are shown in Figure 1.2.
Figure 1.2 Standard UFC equipment
UFC Standard equipment
•Instrument with backlit graphic display.
•Transducer cables (x2) 16.5 feet (5.0m) in length.
•Transducers ‘A-ST’ x2 (UFC-A) for use with pipes ranging 0.5 to 4.5 inches (13 to 115 mm).
•Transducers ‘B-ST’ x2 (UFC-B) for use with pipes ranging 2 to 79 Inches (50 to 2000 mm).
•Transducer holder for use with ‘A’ or ‘B’ transducers.
•Steel bands used to secure the transducer holder to the pipe.
•Acoustic couplant applicator.
•USB Memory stick.
•User documentation.
UFC Optional equipment
•Transducer set 'D' can be used for monitoring pipes of 59 inches to 197 inches (1500 to 5000 mm) outside
diameter, over a temperature range -4°F to +176°F (-20°C to +80°C). This optional kit is supplied in a
Acoustic
Steel
Transducer
Transducers
(Sensors)
UFC
Instrument
Mounting
Earthing
Transducer
Cables (x2)
User Documentation
Holder
Couplant
Applicator
(Ax2, or Bx2)*
Clamps (x2)
Bands (x2)
Cable Kit
Transducer Clamps
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separate case and includes the type 'D' transducers together with ratchet straps and holders for attaching
the transducers to the pipe.
1.4 UFC Instrument
The UFC is a microprocessor controlled instrument operated through a menu system using an inbuilt LCD display
and keypad. It can be used to display the instantaneous fluid flow rate or velocity, together with totalized volumes.
The instrument also provides an isolated current output, or variable pulse output, that is proportional to the
measured flow rate and can be scaled to suit a particular flow range. Two isolated alarm outputs are provided
which can be configured in a number of ways. For example, to operate when the flow rate exceeds a specified
maximum or minimum value.
Figure 1.3 Instrument details
1.4.1 Connections
Transducer connections
The transducers are connected to two coaxial sockets located on the bottom left-hand of the instrument. The silk-
screen above these connectors show a red and blue triangle and a direction of flow symbol. For a positive flow
reading, it is important that the upstream transducer is connected to the RED socket and the downstream
transducer to the BLUE one. It is safe to connect or disconnect these cables while the instrument is switched on.
4 to 20 mA, ‘Pulse’, and Alarm I/O connections
The 4 to 20 mA, ‘pulse’, and alarm I/O cables, enter the bottom of the instrument via two cable glands and
connected internally to a terminal block. Full details of the terminal connections are provided in Chapter 2
(Installation).
Power supply
Two cable glands located on the bottom right-hand side of the instrument are available for the power supply
cable. Two sizes of glands are provided to accept cables of different diameters.
Keypad
LCD Display
Coaxial cables to transducers
Cable glands for
Small & Large Glands
for power connection
Alarms & I/O connections
Blue = Downstream
Red = Upstream
USB Connector
(for memory key)
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1: General Description
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1.4.2 Keypad
The instrument is configured and controlled via a 15-key tactile membrane keypad, as shown in Figure 1.4.
Figure 1.4 UFC Keypad
Menus and the menu selection keys
Note: As a security measure, once the instrument has been set-up for the first time, a password is required to
gain subsequent access to the operating menus (see page 22).
The UFC menus are arranged hierarchally with the MAIN MENU being at the top level. Menu navigation is
achieved by three keys located on the right hand side of the keypad which are used to scroll UP and DOWN a menu
list and SELECT a menu item. When scrolling through a menu, an arrow-shaped cursor moves up and down the
left hand side of the screen to indicate the active menu choice, which can then be selected by pressing the ENTER
(SELECT) key.
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 DOWN past the bottom visible item. Menus
generally ‘loop around’ if you scroll beyond the first or last items.
If you select Exit on any menu it usually takes you back one level in the menu hierarchy, but in some cases it
may go directly to the ‘Flow Reading’ screen.
Some screens require you to move the cursor left and right along the display as well as up and down. This is
achieved using keys 5 (scroll LEFT) and 6 (scroll RIGHT).
Dual function numerical keypad
The block of keys shown in the center of the keypad in Figure 1.4 are dual function keys. They can be used to
enter straight-forward numerical data, select the displayed flow units, or provide quick access to frequently
required control menus.
Scroll UP
ENTER (SELECT)
Scroll DOWN
Scroll LEFT Scroll RIGHT Numerical keypad
with dual function keys
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1.4.3 Power supply
Mains supply
As standard, the UFC instrument is designed to work with a mains supply of 86 to 236 Vac and 50/60 Hz. A mains
supply fuse is located adjacent to the mains power connection (see Figure 2.2).
24V Supply
An alternative 24 V (ac/dc) power supply module is available as a factory fitted option.
Power failure
The instrument will automatically power-up and become operational when the input power is applied. In the event
of a power failure, the instrument’s configuration parameters are stored in non-volatile memory which then allows
the instrument to return to normal operation immediately power is restored. A real time clock (RTC) records the
date and time of any power disruptions, and time-stamps any such occurrence in the output log. All data logging
ceases while power is unavailable.
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2: Installation
2.1 Safety Precautions and Warnings
2.2 Installing the UFC Instrument
2.2.1 Positioning the instrument
The UFC instrument should be installed as close as conveniently possible to the pipe-mounted ultrasonic
sensors. Standard transducer cables are 16.5 ft (5 m) in length with 33 ft (10 m) 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 328 ft (1000 m) can be provided. Consult Dwyer 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 500 mA
fuse is fitted internally in the instrument’s input supply line.
WARNING
LETHAL VOLTAGES
You may be exposed to potentially lethal (mains) voltages
when the terminal cover of this instrument is removed.
Always isolate the supply to this instrument before removing
the terminal cover.
WARNING
LETHAL VOLTAGES
This instrument must be installed by an electrically qualified
technician aware of the potential shock hazards presented
when working with mains powered equipment.
WARNING
SUPPLY EARTHING
If the equipment is powered from a 24 Vac supply then the
supply must be isolated from earth.
Caution
IP65 Enclosure Protection
Blanking plugs are fitted to the cable glands on leaving the manufacturer.
In order to preserve the enclosure’s IP65 rating, ensure that the blanking plugs
remain fitted in any unused cable gland.
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2.2.2 Mounting the instrument
Ideally, the UFC enclosure should be fixed to a wall using three screws – see Figure 2.2.
1. Remove the UFC 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 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 two fixing points.
5. Clear the site of any dust/debris, then mount the enclosure on the wall.
Figure 2.1 UFC Mounting and connection details
GND
TxD
RxD
mA+
mA-
PULSE+
PULSE-
AL1+
AL1-
AL2+
AL2-
IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8 IO9
IO10 IO11 IO12
F1
24V
+ -
230V AC
L N E
4.5in
7.8in
Screw Slot
Keyhole
Mounting Details
The instrument should be
securely wall-mounted using the
three fixing points shown.
Cable connections
All power and control cables enter
through cable glands located on the
bottom of the instrument and connect
to terminal blocks as shown.
GND
TxD
RxD
mA+
mA-
PULSE+
PULSE-
AL1+
AL1-
AL2+
AL2-
IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8 IO9
IO10 IO11 IO12
F1
24V
+-
230V AC
LNE
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2.2.3 Connecting the instrument
All cables enter the instrument through the (4) cable glands located at the bottom of the instrument and are
connected by means of screwed terminals to a number of plug-in connectors – see Figure 2.1.
Control & monitoring cables
Depending on the fitted options, any of the following control and monitoring cables may be required:
•Current output – a 4 to 20 mA, 0 to 16 mA, or 0 to 20 mA monitoring signal is output at terminal mA+ and
mA-. (mA+ is the current output terminal and mA- is the return terminal).
•Pulse output – an opto-isolated pulse output is available at terminals PULSE+ and PULSE- (PULSE+ is the
pulse output terminal and PULSE- is the return terminal).
•Alarm Outputs – two programmable, multifunction alarm outputs are available using MOSFET, SPNO
relays. The relays, which are rated at 48 V/500 mA continuous load, are connected to terminals
ALARM1+, ALARM1-, ALARM2+ and ALARM2- respectively.
•Expansion ports – terminals IO1 to IO12 are used for I/O connections to a number of optional expansion
boards that may be fitted to the UFC expansion slot.
1. Remove the terminal block cover.
2. Route the control and monitoring cables through the two smaller cable glands.
3. Cut the wires to length, strip back the insulation by approximately 0.4in (10 mm) and connect them to the
required terminals identified in Figure 2.1.
4. On completion, tighten the cable glands to ensure the cables are held securely.
Power connections
The UFC instrument can be powered from a mains supply (86 to 264 Vac, 47 to 63 Hz) or from a 24 V(ac/dc)
supply if it is fitted with a 24 V supply module.
1. Route the power cable through one of the two cable glands located below the power connection terminals,
using the gland most suitable for the power cable diameter.
2. Cut the wires to length, strip back the insulation by approximately 0.4 inches (10mm), and connected to them
to the correct power supply terminals identified in Figure 2.1.
3. On completion, tighten the cable glands to ensure the cables are held securely.
4. Refit the terminal block cover.
WARNING
LETHAL VOLTAGES
Ensure the power cable is isolated from the mains supply.
Do not apply mains voltage with the terminal cover removed.
WARNING
SUPPLY EARTHING
If the equipment is powered from a 24V AC supply then the
supply must be isolated from earth.
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2.3 Installing the Ultrasonic Transducers
2.3.1 Transducer positioning
Figure 2.2 Locating the transducers
Figure 2.3 Transducer holder attachment (reflex vs. diagonal mode)
The UFC equipment expects a uniform flow profile as a distorted flow will produce unpredictable measurement errors. Flow
profile distortions can result from upstream disturbances such as bends, tees, valves, pumps and other similar obstructions.
To ensure a uniform profile, the transducers must be mounted a sufficient
distance away from any cause of distortion. Flow
Valid transducer location
10 x Diameter 20 x Diameter
45°
Uniform Flow Profile Distorted Flow Profile
Possible
sludge
Air
Flow
Transducer
Holder
45°
In many applications an even flow velocity profile over a full 360° is unattainable due to, for example, air turbulence at the
top of the flow and possibly sludge in the bottom of the pipe. Experience has shown that the most consistently accurate
results are achieved when the transducer holders are mounted at 45° with respect to the top of the pipe.
Possible
sludge
Air
Reflex Mode Diagonal Mode*
Transducer Transducer
Transducer Holder 2
Transducer Holder Transducer Holder 1
Transducer Holder 2
45°
*Note: when using the UFC in the ‘diagonal’ mode an additional transducer holder and fixing kit is required.
Holder Holder 1
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To obtain the most accurate results, the condition of both the liquid and the pipe wall must be suitable to allow the
ultrasound transmission along its predetermined path. It is important also that the liquid flows uniformly within the
length of pipe being monitored and that the flow profile is not distorted by any upstream or downstream
obstructions. This is best achieved by ensuring there is a straight length of pipe upstream of the transducers of at
least 20 times the pipe diameter and 10 times the pipe diameter on the downstream side, as shown in Figure 2.2.
Flow measurements can be made on shorter lengths of straight pipe, down to 10 diameters upstream and 5
diameters downstream, but when the transducers are positioned this close to any obstruction the resulting errors
can be unpredictable.
Preparation
Before you attach the transducers you should first ensure that the proposed location satisfies the distance
requirements shown in Figure 2.2, otherwise the resulting accuracy of the flow readings may be affected.
Prepare the pipe by degreasing it and removing any loose material or flaking paint in order to obtain the best
possible surface. A smooth contact between the pipe surface and the face of the transducers is an important
factor in achieving a good ultrasound signal strength, and therefore maximum accuracy.
2.3.2 Transducer attachment
Figure 2.4 Transducer attachment (completed assembly)
Type ‘A’ or ‘B’ transducers are attached to the pipe using the adjustable guide rail assembly shown in Figure 2.4.
The guide rail itself is secured to the pipe using two wrap-around steel bands. For user convenience, an imperial
(inches) and metric (millimetres) ruler is attached to the side plate of the guide rail – as shown in Figure 2.4. Once
the guide rail assembly is fully assembled the transducers are locked into position by tightening the transducer
clamp.
Key Point: Do not expect to obtain accurate results if the transducers are positioned
close to any obstructions that distort the uniformity of the flow profile.
Rectangular Upstream
Downstream
Stainless steel bands
transducer
opening transducer
Transducer
Cable Connector
Transducer clamp
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Note: When using the UFC in the ‘diagonal’ mode, or in ‘reflex’ mode on pipes over 13.75 inches diameter, two
guide rails are required with a transducer mounted in each one – see Paragraph 2.3.5 for diagonal mode details.
2.3.3 Attaching the guide rail to the pipe
1. Position the guide rail horizontally on the pipe
at 45° with respect to the top of the pipe and
secure it in position using the supplied
stainless steel banding, as shown in Figure
2.5.
Note: In the following procedure the guide rail is
installed with the rectangular opening facing
towards the upstream end of the pipe.
2.3.4 Fitting the transducers
1. Tighten each transducer clamp
clockwise until it is close to the top
of the transducer Figure 2.6. This
is necessary in order to prevent
the acoustic couplant touching the
pipe when the transducer is
initially inserted into the guide rail
– as described below.
2. Using the suppled syringe
applicator, apply a 0.1 inch bead
of acoustic couplant to the base of
both transducers (Figure 2.7).
3. Thread the downstream transducer cable (blue)
through the right-hand end of the guide rail and up
through the rectangular opening at the top left-
hand end of the guide rail, as shown in Figure 2.8.
4. Connect the downstream cable (blue) to one of
the transducers.
Figure 2.5
Figure 2.6 Figure 2.7
Figure 2.8
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Note: When carrying out the following steps handle the transducer assembly with care to avoid smearing the
acoustic couplant on the pipe whilst attaching the transducer to the guide rail.
5. Carefully lower the transducer and cable through
the rectangular opening until the slots in the side
of the transducer clamp align with the edges on
the top of the guide rail.
6. Carefully slide the downstream transducer
assembly along the guide rail until the inner face
of the transducer is aligned with the '0' mark on
the ruler scale (Figure 2.10).
7. Lower the transducer onto the pipe by turning the
transducer clamp anti-clockwise until it is ‘finger
tight’ (do not use a spanner).
8. Thread the upstream signal cable (red) through
the left-hand end of the mounting rail and connect
it to the second transducer (Figure 2.11).
9. Following the method used to insert the
downstream transducer, carefully lower the
transducer assembly through the rectangular
opening until the slots in the side of the transducer
clamp align with the edges on the top of the guide
rail (Figure 2.9).
Figure 2.9
‘0’ on ruler scale
Figure 2.10
Figure 2.11
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10. Position the upstream transducer so that the inner
face of the transducer is set to the required
separation distance on the ruler, as shown in
Figure 2.12 (2 inches in this example).
Note: The separation distance for a particular
application can be found using the ‘Quickstart’
menu as described in Paragraph 3.2.
11. Lower the transducer onto the pipe by turning the
transducer clamp anti-clockwise until it is ‘finger
tight’ (do not use a spanner).
Figure 2.13 shows the final position of the
transducers when the transducer clamps are fully
tightened.
12. Ensure the transducer signal cables are correctly
connected to the UFC instrument – i.e. with the
RED cable connected to the upstream transducer
connector and the BLUE cable to the downstream
transducer connector.
13. In some cases, particularly on large pipes using
diagonal mode, or pipes with a poor internal
condition, the signal from the sensors can be very
noisy.
In order to improve sensor performance and noise
immunity, we recommend that the transducers are
earthed, using the supplied cables and attachment
hardware, in all installations – as shown in Figure
2.14.
Note: Remove any paint on the pipe in the area of
the clamp to achieve a good electrical connection.
Calculated separation distance
Figure 2.12
Figure 2.13
Figure 2.14
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2.3.5 Transducer attachment (diagonal mode)
This mode of operation requires two transducer holders fitted on opposite sides of the pipe, as shown in Figure
2.15 – notice that the transducer holders are still fitted on a 45° axis with respect to the top of the pipe. When
used with type ‘A’ or ‘B’ transducers, the transducer holders used are identical to that shown above, and the
second transducer holder and fixings must be purchased as an option kit.
When installing the equipment to operate in the diagonal mode, the method of securing the transducers to the
transducer holders and connecting them to the UFC instrument is identical to that described above for the reflex
mode. The major difference is that you have to physically mark out the required position of the transducers on the
pipe in order to determine where to attach the transducer holders.
1. Obtain and note the required separation distance between the transducers using the ‘Quickstart’ menu, as
described in Paragraph 3.2.
2. Using whatever means available, mark a reference line around the circumference of the pipe approximately
where the upstream transducer is to be fitted – line ‘A’ in Figure 2.15.
3. On line ‘A’, mark a position (point ‘X’) on an axis of approximately 45° from the top of the pipe, then draw a
three foot line (‘B’) perpendicular to ‘A’ and parallel to the pipe axis.
4. On line A, mark a position (point ‘Y’) 180° opposite point ‘X’.
5. From point ‘Y’, draw a three foot long line (‘C’) perpendicular to ‘A’ and parallel to the pipe axis. This is shown
as a dashed line in Figure 2.15 as it is on the rear of the pipe.
6. Mark a position (point ‘Z’) on line ‘C’ which is equal to the transducer separation distance noted in step 1 from
point ‘Y’.
7. Position and attach the upstream transducer holder to the pipe such that line ‘B’ runs centrally along the
length of the transducer holder and point ‘X’ is within the transducer attachment part of the transducer holder.
8. Fit the upstream transducer (red cable) to the transducer holder as described in Paragraph 2.3.4 such that
the leading face of the transducer aligns with line ‘A’.
9. Position and attach the downstream transducer holder to the pipe such that line ‘C’ runs centrally along the
length of the transducer holder and point ‘Z’ is within the transducer attachment part of the holder.
10. Fit the downstream transducer (blue cable) to the transducer holder as described in Paragraph 2.3.4 such
that the leading face of the transducer aligns with point ‘Z’.
11. Connect the transducer cables to the UFC instrument.
Key Point: For installations on larger pipes (in the range 79 inches to 197 inches
O.D.) it is necessary to use the type 'D' transducer kit which contains the transducers
together with their particular mounting rails and fitting instructions. This will have
been supplied with the electronics assembly that is configured to work with these
larger pipes.
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Figure 2.15 Transducer mounting for diagonal mode of operation
45°
Upstream
HINT: An easy way to draw a perpendicular circumference around a large pipe is to wrap a length of material such
as chart paper around the pipe, aligning the edges of the paper precisely at the overlap. With the edge of the chart
paper being parallel, either edge describes a circumference around the pipe that is perpendicular to the pipe axis.
Mark the chart paper exactly where it overlaps. Then, after removing the paper from the pipe, fold the measured
length in half keeping the edges parallel. The fold line now marks a distance exactly half way around the pipe.
Put the paper back on the pipe and use the fold-line to mark the opposite side of the pipe.
Flow
Separation Distance
A
X
Y
C
B
Z
45°
Downstream
transducer
transducer
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3: Operating Procedures
17
3: Operating Procedures
QUICK START
Enter data
Attach sensors
FLOW READING
Carry out any necessary calibration (Paragraph 3.3)
How to adjust the Zero Flow Offset – Paragraph 3.3.2
How to adjust the Calibration Factor – Paragraph 3.3.3
How to adjust the Roughness Factor – Paragraph 3.3.4
How to adjust the Damping Factor – Paragraph 3.3.5
Set-up a monitoring (Paragraph 3.4)
How to measure totalized flows – Paragraph 3.5
Operation with an Energy Meter – Paragraph 3.7
Configure the interfaces
(Paragraph 3.4)
Set date/time, Language
Initial instrument setup (Paragraph 3.1)
Connect and take basic flow readings (Paragraph 3.2)
4-20mA ON/OFF – Paragraph 3.4.1
4-20mA Calibration – Paragraph 3.4.1
Pulse ON/OFF – Paragraph 3.4.2
Pulse calibration – Paragraph 3.4.2
Alarm outputs – Paragraph 3.4.3
Data Logging (Chapter 4)
How to set up basic (manual) logging – Paragraph 4.1
How to set up auto-timed logging – Paragraph 4.2
How to download logged data – Paragraph 4.3
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