Thank you for purchasing Dwyer Instruments ultrasonic flowmeter Model UXF2.
The instruction manual covers the installation, operation, checkup and maintenance of the flow transmitter (UXF2) and
Detector set (SX3). Review the manual prior to operation.
Before operation, review this instruction manual to ensure correct installation, operation and maintenance
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of the flowmeter system. Note that incorrect operation may lead to malfunction or personal injury.
The specifications of this flowmeter are subject to change for product improvement without prior notice.
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Do not attempt to modify the flowmeter without permission. Manufacturer is not responsible for equipment
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operation or safety compromised as a result of modification without explicit permission. If it is necessary
to modify the flowmeter, contact manufacturer in advance.
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This instruction manual shall be maintained for reference.
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After reading the manual, be sure to store it in an accessible location.
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Manual should be delivered to appropriate operational or technical staff responsible for the flowmeter.
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If the instruction manual has been lost, request a replacement from the manufacturer.
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Manufacturer: Dwyer Instruments, Inc.
Type: Described on company nameplate on main frame
Date of manufacture: Desribed on company nameplate on main frame
Product nationality: Japan
Dwyer Instruments, Inc.
Copy of contents of this manual in part or whole is not authorized
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without written permission.
Contents of this manual are subject to change without prior notice.
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NOTICE
Issued in June 2007
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ULLETIN F-70
SAFETY PRECAUTION
Before use, read the following safety precaution to ensure correct operation of the flowmeter.
Ɣ
The following items are important for safe operation and must be fully observed. These items are classified
as "DANGER" and "CAUTION".
Warning & Symbol Meaning
Incorrect handling may lead to a risk of death or severe injury.
Incorrect handling may lead to a risk of medium or light injury, or to a risk of
physical damage.
Ɣ
The items noted under "
Ɣ
All the items are important and must be fully observed.
" may also result in serious trouble depending on circumst ances.
Caution on Installation and Piping
z
This product is not an explosion-proof structure. Do not use it in a place
with explosive gases, otherwise, this may result in serious accident such as
explosion, fire, etc.
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The unit should be installed in a place conforming with the installation
requirements noted in this instruction manual. Installation in an improper
location may lead to a risk of electric shocks, fire, malfunction, etc.
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The unit should be installed as noted in the manual. Improper installation
will cause failure, trouble or malfunction of the unit.
z
During installation, make sure that the inside of the unit is free from cable
chips and other foreign objects to prevent fire, trouble, malfunction, etc.
z
The items under "Caution on Installation" noted in the manual must be fully
observed; careless installation may result in trouble or malfunction of the
unit.
Caution on Wiring
z
When performing wiring termination to prevent output trouble caused by
moisture, dew condensation or water leak, follow “Section 3.3 Flow
transmitter wiring” described in this manual
z
Before performing the wiring work, be sure to turn OFF the main power to
prevent electric shocks.
z
Do not perform wiring work outdoors on rainy days to prevent insulation
deterioration and dew condensation; otherwise, it can result in trouble,
malfunction, etc.
z
Be sure to connect a power source of correct rating. Connection of a
power source of incorrect rating may lead to a risk of fire and injury.
z
The unit must be grounded as specified to prevent electric shocks or
malfunction.
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The analog output signal cable should be wired as far away as possible
from high-voltage lines to prevent electrical interference as it will cause
malfunction of the unit.
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To prevent malfunction of the unit, the analog output signal cable and
power cable should be wired through separate conduits.
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B
ULLETIN F-7
0
Caution on Maintenance/Inspection
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The unit should be inspected daily to verify proper measurement
results.
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When measuring the insulation resistance between the power/output
terminal and the case, follow “Section 5.2.3 How to measure the
insulation resistance” described in this manual.
z
If the fuse is blown, detect and eliminate the cause, and then replace the
fuse with a spare. If there are no spares, replace the fuse with equivalent
specified in this manual (may be procured locally). Use of a
fuse other than specified or its short-circuit may cause an electric shock or
fire. The fuse should be replaced according to “Section 5.3 How to
replace the fuse” described in this manual.
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B
ULLETIN F-70
CAUTION ON INSTALLATION LOCATION
(1) Sufficient space is required for daily inspection, proper wiring, etc.
(2) A location not exposed to direct sunshine nor weathering.
(3) Isolation from excess vibration, dust and moisture.
(4) A location not subjected to radiated heat from a heating furnace etc.
(5) A location not subjected to corrosive atmosphere
(6) A location not to be flooded
(7) A place remote from electrical devices (motor, transformer, etc.) which generate electromagnetic
induction noise, electrostatic noise, etc.
(8) A location not subject to excessive fluid pulsation (near pump discharge side)
(9) A location that provides sufficient flow conditioning with the length of the straight pipe.
(10)A place where ambient temperature and humidity are • 20 to +50qC and 90% RH or less for flow
transmitter, and • 20 to +60
C and 90% RH or less for detector set.
q
- iv -
B
ULLETIN F-7
0
CONTENTS
PREFACE ·········································································································································· i
SAFETY PRECAUTION ················································································································· ii
CAUTION ON INSTALLATION LOCATION··············································································· iv
CONTENTS·······································································································································v
1. OUTLINE OF PRODUCT·············································································································1
This flowmeter is a clamp-on type ultrasonic flowmeter for permanent use based on transit time measuring methods. The
UXF2 is ideal for clean liquids containing no air bubbles such as pure water. The easy-to-use compact and
lightweight design is intended for integration into mechanical devices.
The flowmeter is applicable to small and medium size pipes of diameter range from 25mm to 600mm providing superior cost
performance.
1.1.1. Measuring principle
Measuring principle
Ultrasonic pulses are propagated diagonally from the upstream and downstream sides, and the time difference caused by the
flow is detected to provide the flow rate measurement.
Detector
Upstream sensor
Mounting the detector
Configuration diagram
(1) Single-path system (V method)
Signal cable
Detector
θ
t
2
t
Flow velocity
Downstream sensor
Ultrasonic transducerPipe
Flow
transmitter
Power supply
1
4 to 20mA
DC
Contact
D
Flow
transmitter
Plastic wedge
Lining
Output signal
(2) Single-path system (Z method)
Signal cable
Detector
Flow
transmitter
4 to 20mA
DC
Contact
Power supply
(3) When synchronizing
Detector
Detector
Signal cable
Signal cable
Power supply
Flow
transmitter
(master)
Synchronizing
signal wiring
Flow
transmitter
Power supply
(slave)
4 to 20mA
DC
Contact
4 to 20mA
DC
Contact
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ULLETIN F-70
1.2. Checking the received products
Flow transmitter (UXF2)
x
Flow transmitter unit······································································1 set
W aterproof gland ············································································1 set (mounted on main unit)
W all mounting fixture ····································································1 set (mounted on main unit)
Pipe mounting fixture (option) ·······················································1 set
(U bolt, support fixture, 2 wing nuts, 2 spring washers, 2 plain washers)
Detector (SX3-A0/B0)
x
Frame ···························································································1 pc
Sensor unit ······················································································1 set (2 pcs)
Stainless steel belt ···········································································1 set (SX3-A0: 2 pcs. SX3-B0: 4 pcs.)
Spring fixture···················································································2 pcs
Silicone rubber or silicone-free compound (option) ······················1 pc
Detector (SX3-C0)
x
Small detector ················································································1 set (2 pcs)
Chain······························································································1 set (2 pcs)
Detector (SX3-D0)
x
Small detector ·················································································1 set
Wire rope ······················································································1 set (2 pcs)
Mounting spring··············································································1 set (2 pcs)
Signal cable (for SX3-A0/B0) (SX3C: length designated) ·········· 1 set (2 pcs)
x
Signal cable (for SX3-C0/D0) (SX3C: length designated) ·········· 1 set (2 pcs)
Belt tightening tool (option) ························································· As ordered
x
Flow transmitter (UXF2)
Piping mounting fixture Detector (SX3-D0)
Detector (SX3-A0, SX3-B0)Detector (SX3-C0)
Small size detector
Chain
Small size detector
Option
Wire rope
Signal cable (SX3C)
Mounting spring
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ULLETIN F-7
0
1.3. Checking the type and specifications
The type and specifications of product are indicated on the specifications plate mounted on the flow transmitter and
detector frame. Make sure the models are as ordered referring to the type diagrams given below.
<Flow transmitter (UXF2)>
<Detector (SX3-A0/B0)>
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ULLETIN F-70
<Detector (SX3-C0/D0)>
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10213456781191213
B
0
3YYSVLF-
Enclosure (4th digit code)
S
14
2
1
0
Y
Y
T
E
F
PAGE BLANK
(Reserved for future use)
Outdoor immersion-proof case
Power supply (5th digit code)100 to 240V AC±10%, 50/60Hz20 to 30V DC
Option(11th digit code)NoneTag name plateUse for explosion-proof sensorsUse for explosion-proof sensors with Tagname plate
ULLETIN F-7
Description
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ULLETIN F-70
1.4. Names and functions of each part
1.4.1. Flow transmitter (UXF2)
No. Name Description
1 Wiring connection port,
large
2 Wiring connection port,
small
3 Indication and setting unit Indicates and sets the flow rate, etc.
4 Received wave diagnostic
indication
5 Escape key Return to the next-higher layer or cancels the set status.
6 UP key Selects items, numeric values and symbols.
7 Shift key Moves the cursor and selects decimal place.
8 Entry key Enters a selection or registers a setting.
9 LCD indication Indicates the flow rate or setting.
10 Power terminals Power cables are connected.
11 Input/output terminals Signal cable, analog output and DO output cables are connected.
12 Communication board
terminals
13 Fuse holder Houses a fuse.
14 Relay For DO2 output
15 Communication board Mounted if communication synchronization is optionally designated.
16 Arrester board Board for output mounted if arrester is optionally designated.
For power cable, output cable
Wiring connection port for signal cable only
Indicates whether received wave is normal (green) or abnormal (red).
Communication cable is connected (communication board is optional).
- 6 -
1.4.2. Detector (SX3 Series)
S
B
0
SX3-A0/B0
ULLETIN F-7
3
13
X3-C0/D0
6
7
2
9
8
7
5
11
7
8
10
No. Name Description
1 Frame for small size Fastens the sensor unit on pipe.
2 Sensor unit Sends and receives an ultrasonic wave.
3 Stainless steel belt Fastens the frame on pipe.
4 Spring fixture Removes the play of stainless steel belt.
5 Scale For reading the sensor mounting spacing
6 Fastening hole For positioning and fastening the sensor units
7 Signal cable Transmits send/receive signals.
8 Small size detector Sends and receives an ultrasonic wave.
9 Chain Fastens the detector on pipe.
10 Wire rope Fastens the detector on pipe.
11 Mounting spring Removes the play of wire rope.
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ULLETIN F-70
2. SELECTION OF INSTALLATION PLACE
Select an installation place taking into account the following factors from the viewpoint of ease of maintenance and
checkup, instrument life, and reliability.
(1) A place where ambient temperature and humidity are –20 to +50qC and 90% RH or less for flow
transmitter (UXF2), and –20 to +60qC and 90% RH or less for detector SX3.
(2) A place not exposed to direct sunshine nor effects of weather.
(3) Sufficient space for daily inspection, wiring, etc.
(4) A location not subject to radiated heat from a heating furnace, etc.
(5) A location not subjected to corrosive atmosphere.
(6) A location not subject to flooding.
(7) A location free from excessive vibration, dust, dirt and moisture.
2.1. Flow transmitter
Secure at least 100 mm of space between the flow
transmitter and nearby wall. Also secure a space for
opening the front cover for maintenance.
Secure a cable wiring space under the enclosure.
N
E
P
O
133100133
370 min.
Top view of mounting
min.
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B
ULLETIN F-7
0
2.2. Detector
The measuring accuracy is considerably affected by the detector mounting place, i.e., status of piping for measuring a flow
rate. Select a place which meets the condition in section 2.2.1. (Length of straight pipe). Also, sufficiently secure a
space for installation and maintenance in accordance with the following diagram.
2000min.
Note
200min.200min.
D + 1200 min.600min.D600min.
D: Pipe diameter
Necessary space for detector mounting place
2.2.1. Length of straight pipe
The length of upstream and downstream straight pipe of the ultrasonic detector should be long enough to ensure accurate
measurements.
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ULLETIN F-70
(D: Nominal diameter of pipe)
NameStraight length of upstream pipingStraight length of downstream piping
L≥5D
L≥10D
90° bend
Tee
Diffuser
Reducer
10D min.
0.5D min.
10D min.
10D min.
1.5D min.
Detector
L≥50D
L≥30D
D
L≥10D
L≥10D
L≥5D
L≥5D
Valve
Pump
Note: Quoted from JEMIS-032
L≥30D
Flow controlled upstream
Check valve
Stop valve
P
L≥10D
Flow controlled downstream
L≥50D
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2.2.2. Mounting position
B
0
The detector can be installed vertically, horizontally or in any position provided the following:
(1) The piping must completely be filled with fluid when it flows.
ULLETIN F-7
Air tends to accumulate.
May not
completely be
filled with liquid.
Pump
May not completely be filled with liquid.
Good
Good
(2) In case of horizontal piping, mount the detector within r45q from the horizontal plane. Otherwise, the measurement
could be impossible if bubbles stay in the upper part of piping or if deposits are accumulated in the lower part of
piping. In case of vertical piping, the detector may be mounted at any position on its periphery provided that the
flow is upward.
Pipe
45°
Horizontal
45°
(3) Do not mount the detector on a distorted part, flange or welding.
Weldment
Welding is included.
Welding is partly involved.
Avoid Welding.
Weldment
Off the Welding.
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ULLETIN F-70
3. INSTALLATION AND PROCEDURES PRIOR
TO OPERATION
3.1. Outline of installation procedure
(1) Select the flow transmitter and detector installation places.
(2) Install and wire the flow transmitter.
(3) Turn on powe r.
(4) Set the piping parameters, and calculate the sensor unit spacing (if already programmed, check the sensor unit
spacing).
(5) Mount the frame on the piping to measure on.
(6) Mount the sensor unit.
(7) Set the measurement range.
(8) Adjust zero point.
(9) Start a measurement.
- 12 -
3.2. Installation of flow transmitter
3.2. Installation of flow transmitter
The flow transmitter may be mounted on a wall or 2B pipe stand (option).
3.2.1. Wall mounting
For wall mounting, use two M8 bolts.
According to the mounting hole dimensions shown below, drill holes on the wall, and tighten M8 bolts.
3.2.2. 2B pipe stand mounting
When mounting on 2B pipe, be sure to use the complete set of fixtures (U bolt, support fixture, plain washer,
spring washer, wing nut) that are provided. Tighten the wing nut by hand. Assemble pipe mounting
components as shown in the figure below and do not overtighten. Overtightening may warp or damage the
plastic enclosure.
Mount the instrument on 2B pipe stand as illustrated below.
2B Pipe stand
U - bolt
Fixture assembly
Plain washer
Spring washer
Wing nut
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ULLETIN F-70
3.3. Flow transmitter wiring
3.3.1. Precautions in wiring
(1) Use a special coaxial cable (SX3C) as a signal cable between the detector (SX3) and flow
transmitter (UXF2). Continuous lengths are required. Signal cables may not be spliced or joined.
(2) Be sure to pass the signal cables through a metal conduit between the detector and flow transmitter.
Upstream and downstream signal cables may be put in the same conduit but, to avoid an interference, do
not put the power cable together.
(3) For output signal, use a shielded cable, where possible.
(4) To avoid noise interference, do not run cables through conduits carrying heavy duty or high voltage
lines.
(5) If a ground wire is included in the power cable, connect it to ground as it is.
(6) A power switch is not provided on the instrument and must be mounted separately if required.
(7) Cover unused wiring glands and protect from moisture intrusion.
3.3.2. Applied wiring
Use the following cables.
Power cable : 3 or 2 core cabtyre cable.
z
Nominal cross-sectional area 0.75 mm
Finished outer diameter 11 mm.
Output signal cable : 2 or, as required, multiple core cabtyre cable.
z
Finished outer diameter 11 mm.
Detector-flow transmitter cable : Signal cable by type designation (heat-resisting high-frequency coaxial cable having
z
50: of characteristic impedance. In case SX3-A0/B0, provided with oneside waterproof BNC connector).
Finished outer diameter 5 mm.
2
min.
3.3.3. Treatment of wiring ports
The outer case of flow transmitter is waterproof (IP65). However, if installed in a humid place, the wiring ports must be
made airtight to avoid ingress of moisture, condensation, etc. Be sure to use the waterproof glands furnished with the
instrument in order to ensure the waterproof seal. Hermetically seal unused glands with caps provided.
Do not install the instrument where there is a risk of flooding.
- 14 -
3.3.4. Wiring to each terminal
B
0
Refer to the following diagram for carrying out wiring.
ULLETIN F-7
Communication board terminal block (option)
RS-232C
NC
GNDRXDTXD
RS-485 and synchronization
SYNC
SHILD TXDR2 TXDR1
Power cable
Output signal cable
(analog output, DO1, DO2,
communication synchronization)
Downstream
sensor cable
Power board terminal block
AC power source: 100 to 120 or 200 to 240 V AC,
50/60 Hz
LN
GNDGND
Upstream
sensor cable
Main board terminal block
Iout(+) DO1(+) DO2(+)
Iout(-) DO1(-) DO2(-)
Upstream sensor
GNDHF1
GNDHF2
Downstream sensor
Synchronization
RS-485
External ground terminal
Ground terminal
Red (upstream sensor)
DC power source: 20 to 30V DC
+−
GNDGND
Black (downstream sensor)
Special signal cable (SX3C)
Iout : Analog output
DO1 : Transistor open collector
DO2 : Relay contact
Notes
1. All screws are M3 on the terminal block. Use crimp-style terminals for M3 and whose outer diameter is 5.8 or
smaller.
2. Be sure to connect to ground the power board terminal block or external ground term in al (class D ground).
3. For output signal, use multiple core cable as required.
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ULLETIN F-70
3.4. Setting the piping parameters and calculating the
sensor unit spacing
After installation and wiring of the flow transmitter (sensor unit may not be wired), turn on power, input the piping
parameters below, and calculate the sensor unit installation spacing. (If the unit is already programmed, the
following parameters have already been input. Check the installation spacing in this case.)
Item Input
method
Pipe outer diameter Value 10 to 650mm
Pipe material Menu PVC, PVDF, PEEK, PP, CARBON STEEL, STAINLESS STEEL, COPPER,
PIPE S.V (Note 1)
Pipe wall thickness Value 0.1 to 100mm
Lining presence and
material selection
Lining thickness Value 0.1 to 10mm
Fluid type Selection Water, Sea water, FLUID S.V (Note 1)
Kinematic viscosity Value 0.00E–6m2/s to 999.999E–6 m2/s (Note 1)
Detector mounting
method
Detector type Selection SX3 A0, SX3 B0, SX3 C0, SX3 D0
Note 1: In case of material or fluid not included in menus, input its sound velocity and kinematic viscosity of the
fluid. The sound velocity can be entered within the range of 1000 to 3700 m/s for piping or lining
material, or 500 to 2500m/s for fluid. (Refer to section 6.6.)
The operating procedure is as follows (from measurement mode).
Note 2: If the parameter protection is set at "PROTECTION ON", change it to "PROTECTION OFF". If ID NO.
is set at this time, ID NO. must be entered.
Keying
key pressed 3 times.
Menu NO LINING, TA R EPOXY, MORTAR, RUBBER, TEFLON, PYREXGLASS,
Select the pipe material from menus. If there is no corresponding menu, input the
sound velocity of pipe material on sound velocity input screen
If necessary, refer to piping data in section 6.6.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.
Input the wall thickness of the measurement pipe. As necessary, check the piping data
in section 6.6.
: Selects a numeric. : Shifts the place.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.
1st line: [LINING MATERIAL]. 2nd line: [NO LINING]. * As selected currently.
If pipe is not lined, press
key to go to selection of next fluid to be measured.
Cursor blinks on 2nd line.
Select the lining material from menus. If there is no corresponding menu, input the
sound velocity of lining material on sound velocity input screen
.
If necessary, see lining data in section 6.6.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.
1st line: [LINING THICKNESS]. 2nd line: [2.00 mm]. * As selected currently.
Note: Not indicated if lining material is set at [NO LINING].
Cursor blinks on 2nd line.
Input the lining thickness.
: Selects a numeric.
: Shifts the place.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.
key pressed.
ENT
key pressed.
key pressed to select.
ENT
key pressed to enter.
key pressed.
ENT
key pressed.
and
ENT
key pressed to enter.
key pressed.
key pressed twice.
ENT
key pressed.
key pressed.
ENT
key pressed to enter.
1st line: [KIND OF FLUID]. 2nd line: [WATER]. * As selected currently.
Cursor blinks on 2nd line.
Select [WATER] or [SEA WATER]. In case of other fluid, input the sound velocity of
fluid on sound velocity input screen
.
If necessary, see piping data in section 6.6.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.
1st line: [KINEMATIC VISCO]. 2nd line: [1.0038E–6m2/s]. * As selected
currently. Kinematic viscosity of water is factory set. If fluid to be measured is
other than water, input the kinematic viscosity referring to piping data in section 6.6.
Cursor blinks on 2nd line.
Input the kinematic viscosity.
: Selects a numeric.
: Shifts the place.
Registered after [**COMPLETE**] is indicated about 1 second on 2nd line.