Oval ULTRA UF-II User manual

1
Ins. No. B-525-6-E
Meter Sizes : 80 and 81
Register Model : UA
U8 (smart type)
ULTRA UF-II
Every ULTRA UF-II (electronic register equipped owmeter) is fabricated and shipped from our factory under
stringent quality control. In order to maintain its design performance throughout its life, this manual offers the
operator the necessary installation, operation and maintenance information.
Be well familiar with these instructions before you place the meter in service and retain this manual at the eld
location for ready reference.
◆ About Meter Size Designation ◆
The size of OVAL positive-displacement flowmeters is basically identified by a two-
digit code. For details, see Product Code Explanation on page 42.

B-525-6-E
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CONTENTS
1. BEFORE YOU BEGIN .............................................................................................. 4
1.1 Conrming the Nameplate .............................................................................................................4
1.2 Transportation Considerations .......................................................................................................4
1.3 Storage Considerations .................................................................................................................4
1.4 Structural Considerations ..............................................................................................................5
2. OPERATING CONDITIONS...................................................................................... 5
2.1 Operating Conditions for Explosionproof Model ...........................................................................6
3. GENERAL ................................................................................................................ 7
4. PART NAMES .......................................................................................................... 8
5. LCD COUNTER DISPLAY........................................................................................ 8
5.1 Register Model UA .........................................................................................................................8
5.1.1 About "MODE" Switch .............................................................................................................8
5.1.2 About the Displayed Messages during Operation ...................................................................9
5.1.3 About "RESET" Switch ............................................................................................................9
5.2 Register Model U8 .......................................................................................................................10
5.2.1 About "MODE" Switch ...........................................................................................................10
5.2.2 Display Functions...................................................................................................................10
5.2.3 Display Selection....................................................................................................................10
5.2.4 Total Flow Reset.....................................................................................................................11
5.2.5 Precautions for Pulse Output Type ........................................................................................11
6. INSTALLATION ...................................................................................................... 12
6.1 Considerations on Installation......................................................................................................12
6.2 Standard Installation, Horizontal Line ..........................................................................................12
6.3 Standard Installation, Vertical Line...............................................................................................12
6.4 Example of Faulty Piping .............................................................................................................12
7. HOW TO CHANGE FLOW DIRECTIONS............................................................... 13
8. WIRING INSTRUCTIONS ...................................................................................... 14
8.1 Wiring Connections at Terminals..................................................................................................14
8.2 Terminal Connections...................................................................................................................14
8.3 Wiring Connections of Register Model UA ..................................................................................15
8.4 About Load Resistance Range, Register Model UA (current pulse and analog output)....................... 15
8.5 Preamp-to-Receiving Instrument Hookup with Register Type U8 ...............................................16
9. OPERATING INSTRUCTIONS ............................................................................... 17
9.1 Flushing the Piping Assembly......................................................................................................17
9.2 Operating Considerations ............................................................................................................17
9.3 Precautions for Models without Battery Pack..............................................................................18
9.4 About the Register Life ................................................................................................................18
10. DISASSEMBLY AND INSPECTION ..................................................................... 19
10.1 Disassembly and Inspection Procedures...................................................................................19
10.2 Assembly....................................................................................................................................21
10.3 Disassembly and Inspection as Installed in the Piping Assembly .............................................21
10.4 Reconditioning the Rotor Gear Teeth.........................................................................................22
10.5 Signal Generating Magnet Disassembly and Reassembly Notes..............................................22
11. UA REGISTER SWITCH FUNCTIONS AND PARAMETER SETUP...................... 23
11.1 Switch Names and Functions ....................................................................................................23
11.1.1 Function Setup Switch "SW2" .............................................................................................24
●
●
CAUTION: lmarked sections apply to
Smart type (register type: U8)

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11.1.2 Output Mode Setup Switch "SW1"......................................................................................24
11.2 Individual Test Pin Functions......................................................................................................25
11.3 Accumulated Total and Instantaneous Flowrate Calculations ...................................................25
11.4 Parameter List............................................................................................................................26
11.5 Parameter Setup Procedure.......................................................................................................28
11.5.1 Reconguration Procedure ..................................................................................................28
11.5.2 Entering New Parameters ....................................................................................................28
11.5.3 About Dummy Output Features (special functions) .............................................................30
11.5.4 Parameter Initialization.........................................................................................................30
11.5.5 About Error Messages .........................................................................................................31
Table 11.2 Menu Trees and Switch Operation.............................................................................32
12. SWITCH FUNCTIONS AND PARAMETER SETUP, OF REGISTER MODEL U8 .... 33
12.1 Switch Names and Functions ....................................................................................................33
12.2 Individual Test Pin Functions......................................................................................................34
12.3 About the Meter Factor..............................................................................................................34
13. SENSOR REPLACEMENT PROCEDURE............................................................ 35
14. BATTERY REPLACEMENT PROCEDURE
(Register Model UA with battery pack)................................................................ 36
14.1 About the Battery .......................................................................................................................36
14.2 Battery Pack Replacement ........................................................................................................36
15 TROUBLESHOOTING .......................................................................................... 37
16. EXPLODED VIEWS AND PARTS LIST ................................................................. 38
17. GENERAL SPECIFICATIONS............................................................................... 40
17.1 Register Model UA Specications .............................................................................................40
17.2 Register Model U8 Specications..............................................................................................41
17.3 Nominal Meter Factor ................................................................................................................41
18. PRODUCT CODE EXPLANATION ....................................................................... 42
19. OUTLINE DIMENSIONS ...................................................................................... 43
•
●
●
CONVENTIONS
Shown in this manual are the signal words NOTE, CAUTION and WARNING, as described in the
examples below:
NOTE: Notes are separated from the general text to bring the user's attention to
important information.
CAUTION: Caution statements signal the user about hazards or unsafe practices
which could result in minor personal injury or product or property damage.
WARNING: Warning statements signal the user about hazards or unsafe practices
which could result in severe personal injury or death.

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1. BEFORE YOU BEGIN
Every ULTRA UF-II is thoroughly tested before it leaves the factory. When received, it should be thoroughly
inspected for indication of rough handling during transit. Necessary handling precautions are described in this
section; read the instructions carefully.
As for other information, nd the respective sections from "CONTENTS" on pages 2 and 3.
For any inquiries, contact your nearest OVAL designated sales ofce.
CAUTION: When you make inquiries, include the product name, model number,
serial number, ratings and other necessary information.
1.1 Confirming the Nameplate
Every ULTRA UF-II is assembled and adjusted
according to individual specifications. Product
co de an d rati ng s are st at ed o n t he re gi st er
nameplate (page 5). Make sure that, by referring to
the GENERAL SPECIFICATIONS on page 40 and
PRODUCT CODE EXPLANATION page 42, the ratings
shown conform to your particular specication.
1.2 Transportation Considerations
(1) To safeguard against damage during transit, transport the ULTRA UF-II to the installation site in the same
container used for transportation from the factory if circumstances permit.
(2) ULTRA UF-II is adjusted and inspected as an assembly consisting of the meter body, sensor and register.
It should therefore be handled as an integral assembly.
(3) The register is accurately set up and adjusted. Do not attempt to remove the front cover to gain access to
its internal assembly.
1.3 Storage Considerations
If an ULTRA UF-II is stored for long periods of time upon receipt before installation, unexpected faulty
conditions could result. If a long-term storage is anticipated, take the following precautions:
(1) Keep your ULTRA UF-II in store in the same shipping container used for transportation from OVAL if
possible.
(2) Place of storage should conform to the following requirements:
- Free from rain and water.
- Free from vibration and impact shocks.
- Temperature and relative humidity in the storage place are at or near room temperature and humidity
(around 25°C and 65%).
(3) Purge the ULTRA UF-II that has once been placed in service with clean air, N2 gas, etc. to prevent the
metered uid from adhering to the meter connections, piping inner walls, housing, etc. before storage. (Wash
clean with suitable detergent if necessary.)
(4) In case of storage for extended periods of time, good practice is to keep in store in the same containers
used for shipment from the factory.
NAMEPLATE
(RATINGS SHOWN)

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2. OPERATING CONDITIONS
To maintain the stated high accuracy and long
service life of OVAL UF-II flowmeter, make sure
that flowrate, pressure, temperature and viscosity
are held within the ratings shown in the nameplate
attached to the top of the register. Do not fail to
conrm these ratings before placing it in service.
CAUTION:
(1) Although allowable ambient
temperature is up to +60 °C for
explosionproof units, it is desirable
that the meter be used at room
temperature and humidity.
1.4 Structural Considerations
(1) The register is of weathertight construction for
outdoor service.
(2) Do not attempt to replace component parts
with substitutes or perform unauthorized circuit
modications.
(3) The cable lead-in supplied with the explosionproof
type forms part of the flameproof enclosure. Do
not attempt to use any substitute lead-in other than
those supplied. The pressuretight packing union
should be tightened securely upon completion of
connections.
- Output provided: For other than 00 in the
last two digits of product code, pressuretight
packing is supplied(Excluding ATEX and FM
explosionproof products).
- Output not provided: For other 00 in the last
two digits of product code, close-up plug is
supplied.
(4) Of the four different pressuretight packings
(φ9, φ10, φ11 and φ12) furnished as standard
accessories, a φ11 packing is tentatively installed
in place. Select from these and install the one
that best ts the nished outside diameter of your
particular cable.
Table 1.1 Applicable Cable Outside Dia. Unit in mm
Packing Code Packing I.D. Cable O.D.
9 9.0 8.5 to 9.0
10 10.0 9.1 to 10.0
11 11.0 10.1 to 11.0
12 12.0 11.1 to 12.0
CAUTION: Moisture intrusion into
the register may make the
display cloudy and cause
problem.
(2) In cases where the register is exposed to elevated temperatures due to exposure to
direct rays of the sun or to radiant heat, ensure, by providing a sunshade or similar
protection, that the meter is used within the operating temperature range.
(3) The UA type register is not provided with subtract function. If pulsation in the flow
(where the fluid moves back and forth in the pipeline under the influence of pressure)
or reversal of flow exists, the total counter may show erratic reading, accumulating all
incoming pulses irrespective of flow direction.
MADE IN JAPAN MNPJ-237
OVAL Corporation
MODEL
TAG. No MAX PRESS.
FLOW RANGE
INT.
CONT.
〜
〜
FULL SCALE TEMP.
PULSE UNIT
SERIAL No.
FLUID
DATE SIZE
METER FACTOR
1. When measuring other Iiquids, consult us.
2. Place the meter body (outer case) in a horizontal
position. For details see instruction manual.
NOTE:
Cable
gland
Cable Lead-in
（）
NOTE: Cable gland is not supplied with non-
explosionproof type models. The
customer is to prepare a watertight
gland (thread size: G1/2). In such a case,
provide means to preclude moisture
from the register.
In case of ATEX or FM
explosionproof type
Adapter
(5) In case of ATEX or FM approvals:
Where ATEX or FM explosionproof specication
is selected, make sure to use cable gland comp-
lying with the certied standards respectively.

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2.1 Operating Conditions for Explosionproof Model
This product is approved as explosionproof. Failure to comply with the following conditions will automatically
nullify this rating.
(1) Do not perform any unauthorized modication to this product.
(2) Before opening the enclosure, if necessary for some reason, ensure safety against hazards associated with
ammable gases present in the atmosphere.
(3) Register Model UA; In case of TIIS explosionproof type used under the ambient temperature of 45°C or
higher, use a cable resistant to the temperature of 75°C or higher.
Register Model U8; In case of TIIS explosionproof type used under the ambient temperature of 50°C or
higher, use a cable resistant to the temperature of 70°C or higher.
(4) Intrinsically safe rating remains valid only when no external circuit is connected to this equipment. To use it
rated intrinsically safe, do not connect it to any external circuitry.
(5) Use under ambient temperature conditions below 60°C.
(6) Metered uid temperature must be held below 120°C.
Specification (1): Output provided (Product code ends with a code other than 00.)
TEM
1
2
3
4
Register (ex. type) Conn. terminals for
external wiring
Cable lead-in
(w/pressuretight
packing)
*1
Ext. wiring Specs.
0.1μF max.
1.0mH max.
External wirings connect across 1-2 and 3-4.
(Supply voltage: 45VDC max.)
*4
Ext. circuit Conn. Terminals for
external wiring
General-purpose
electrical instrument
Hazardous area Nonhazardous area
*3
Fig. 2.1
Specification (2): Output not provided (Product code ends in 00.)
TEM
1
2
3
4
Register (ex. Type) Conn. Terminals for
external wiring
Cable lead-in
(w/close-up plug)
*2
Hazardous area
Fig. 2.2

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NOTE : Detailed explanation of asterisks *1 through *4 in Figs. 2.1 and 2.2.
*1
*3
*4
Explosionproof enclosure of the ex type equipment is represented by a code Exd II BT4/Exia II
BT4. For models with the provision of output (product code ends with a code other than 00), a
pressuretight packing *1 for cable entry is supplied as standard accessory. Flameproof rating (Exd
II BT4) remains valid as long as it is used in place.
However, because of a built-in battery pack, if supply power is removed from this state and an
external circuit *4 is disconnected at the external circuit wiring connection terminals end *3, then
intrinsic safety rating (Exia II BT4) applies.
*2 For models with no provision of output (product code ends in 00), close-up plugs *2
(manufactured by Shimada Electric, Model SBP-16) for cable entry are supplied as standard
accessories. Intrinsically safe rating (Exia II BT4) remains valid as long as these are used in
place.
*4 In working with models with provision of output (product code ends with a code other than
00), use cables that link this product with a general-purpose electrical instrument, (receiving
instrument, etc.) which meet the following requirements:
- Temperature rating : Register Model UA; In case of TIIS explosionproof type used under the
ambient temperature of 45°C or higher, use a cable resistant to the
temperature of 75°C or higher.
Register Model U8; In case of TIIS explosionproof type used under the
ambient temperature of 50°C or higher, use a cable resistant to the
temperature of 70°C or higher.
- Electrical ratings : Allowable cable capacitance 0.1, μF max.
Allowable cable inductance 1.0mH max.
3. GENERAL
This flowmeter has been developed to meet the needs of precise flowrate measurement. The local direct-
reading total counter is an all-electronic register built around a single-chip CPU. With latest electronic
technologies used throughout, this versatile register displays accumulated total ow, instantaneous owrate
(digital readout) and provides, by option, a pulse and analog output proportional to the rate of ow.
In this meter, uid ow is detected by sensing with an amorphous sensor the magnetic elds of permanent
magnets embedded in the oval rotors. As a result, high reliability is achieved.
Features
(1) Uniform-speed revolution, uniform owrate, and uniform torque.
(2) Exceptionally quiet with no noise and low vibration.
(3) You can monitor accumulated total ow and instantaneous owrate locally on the digital display.
(4) When coupled with a remotely located receiving instrument, output signals can readily and simply be used
for applications including control, adjustment and recording.
(5) IEC explosionproof construction offers increased safety. A compactly built body.
(6) A low battery alarm is among its alarm indicator functions.
(7) Both in the local totalizer model and externally powered model, a nonvolatile memory retains variables in
cases of power cycling and power failure.
NOTE : For battery life, see Section 9.4 on page 18.
<NOTE>
With the use over an extended period of time, meter error will deviate more or less from the factory
calibration's. Upon request, we may conduct an instrumental error testing once again and establish
a "new meter factor" in the scaler when your UF-II flowmeter is returned to the factory for periodic
inspection or for other reasons.

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4. PART NAMES
Fig. 4.1
5. LCD COUNTER DISPLAY
5.1 Register Model UA
5.1.1 About "MODE" Switch
Take out the selector magnet inserted at the bottom
of the register, apply it to the labels "MODE" and
"RESET" on the LCD counter face and the display will
scroll through the available readings as shown.
Accumulated total (*)
Instantaneous flowrate:
/h
Instantaneous flowrate:
/min
Resettable total
Mode symbol
NOTE : (*) About UA type register’s grand total
reading. see CAUTION (3) in Sec. 2 on
page 5.
× 1 L
b1：×1 L/h b2：×1L/min
(1) Accumulated Total Flow
An accumulated total of 12345678 L is shown
here.
× 1 L
b1：×1 L/h b2：×1L/min
(2) Instantaneous Flowrate (b1)
An instantaneous flowrate of 1200 L/h is shown
here.
SELECTOR MAGNET
SELECTOR MAGNET
“MODE”
NOTE : Dedicated battery pack is an option.
Not built in the Smart type.
REGISTER
(BATTERY PACK
INCORPORATED)
FRONT COVER
METER BODY FLOW DIRECTION ARROW
REAR COVER
CONNECTING
FLANGE

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× 1 L
b1：×1 L/h b2：×1L/min
(3) Instantaneous Flowrate (b2)
An instantaneous flowrate of 20.00 L/min. is
shown here.
×1L
b2：×1L/min
b1：×1 L/h
(4) Resettable Total Flow
A resettable accumulated total of 34567 L is
shown here.
5.1.3 About "RESET" Switch
Only in the resettable mode, or in "Mode Symbol: " ", the
accumulated total reading is resettable.
CAUTION
Do not fail to install the selector magnet in its
holder after use lest you will not lose it. It uses
an intensive magnet; never hold it close to floppy
disks or other magnetic storage items.
Selector magnet holder
“RESET”
5.1.2 About the Displayed Messages during Operation
(2) Prolonged operation
Held turned "ON" without turning "OFF"
immediately by removing the ngers.
扌 Bars begin to disappear from the leftmost one.
Indicates a countdown before "prolonged
depression" processing takes place.
扌 Holding turned "ON" until the last bar disappears
results in "prolonged depression" processing (*)
to takes place.
(Turning "OFF" before the last bar disappears
results in the same behavior as in (1) to take
place.
* Prolonged operation: An operation required
for Normal mode ⇔ Parameter review mode
selection, nalizing the parameter setting, etc.
NOTE : While "RESET" switch is in a valid mode (resettable total mode, etc.), the same message as stated
above appears in response to "RESET" switch operation.
(There is no distinction between ordinary depression and prolonged depression.)
(1) Ordinary operation
"MODE" switch is turned "ON"
(selector magnet held close to it.)
扌 8 bars appear.
Indicates that the switch is turned
"ON".
扌 Immediately turning "OFF"
(selector magnet the window to the next one.

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<Smart Type>
5.2 Register Model U8
5.2.1 About "MODE" Switch
Take out the selector magnet inserted at the bottom
of the register, apply it to the label "MODE" on the
LCD counter face and the display will scroll forward
through the available readings as shown.
CAUTION
Do not fail to install the selector
magnet in its holder after use lest you
will not lose it. It uses an intensive
magnet; never hold it close to floppy
disks or other magnetic storage
media.
SELECTOR MAGNET
SELECTOR MAGNET
“MODE”
5.2.2 Display Functions
The display can show four different kinds of ow information - total ow, instantaneous actual owrate, percent
instantaneous owrate, and 8-division percent bar graph.
It also shows the following error messages:
Full scale exceeded: ErrorFS
Upper-limit owrate exceeded: ErrorOF
NOTE : Multiple errors will be indicated in priority order below:
ErrorOF > ErrorFS
5.2.3 Display Selection
Two ways are available to select displays - with a
display select switch inside the register, or through
communications with the Smart Communication Unit
Model EL2310 (or HHC: Model EK10).
If your option is through communications, follow the
instructions outlined in the Smart Communication
Unit EL2310 (or HHC: EK10) instruction manual.
NOTE : Show "Transmitter Info." window at
"Congure" menu on the PC screen.
Selection with display select switch requires access
to the display select switch SW1 by opening
the register cover facing its internal assembly and
pressing this switch (see page 33). The display
scrolls forward through available information each
time you press this switch as shown in Fig. 5.1.
EXAMPLE OF READINGS
MODE SYMBOL
TOTALIZED FLOW
INSTANTANEOUS
ACTUAL FLOWRATE
% INSTANTANEOUS
FLOWRATE
8-DIVISION
BAR GRAPH
Fig. 5.1

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<Smart Type>
5.2.4 Total Flow Reset
Displayed total ow can be reset either by the display select switch SW1 (see Fig. 12.1 on page 33) or
through communications with the Smart Communication Unit. If your option is through communications, follow
the instructions outlined in the instruction manual of Smart Communication Unit EL2310.
NOTE : NOTE: Show "Measure" window at "View" menu on the PC screen.
With the display select switch, you can reset the totalizer by holding the display select switch SW1
depressed for more than 3 seconds while the total ow is shown.
5.2.5 Precautions for Pulse Output Type
(1) If your model is of pulse output type, the pulse output and total counter remain inoperative for 15 seconds
approx. after power on while communicating with the Smart Communication Unit. For 15 seconds approx.
after termination of communications, the pulse output and total counter also remain inoperative.
(2) Requirements for validating communications
Communication is valid only when the following requirements are met:
- Flowrate at zero (There is no pulse output.)
- Within 15 seconds after powered on
NOTE : The period of 15 seconds immediately after power on is called "Communication standby mode." (The
built-in indicator, if so equipped, will display as shown in (1) in the gure below.)
If communications are started during this time period, a switchover to "Communication mode"
takes place, permitting you to communicate until power is turned off (The built-in indicator will
display as shown in (2) in the gure below).
To start ow measurement routine, power on again. (After power cycling, the pulse output and total
counter will also remain inoperative for 15 seconds.)
(3) While communications continue, the receiving instrument (total counter, etc.) may overcount under certain
(2)
Communication is started
within 15 seconds after
power on. (Com Mode)
(1) 15 seconds after power on.
(Com Standby Mode)
Fig. 5.2 Display in Response to Power ON, Pulse Output Type
circumstances. To eliminate the possibility of such erratic extra counting, precautions should be taken by
either disconnecting the receiving instrument before starting communications, or keeping track of the most
recent total reading and other important data.
(4) Except for the purpose of communications, do not attempt to connect the probe of Smart Communication
Unit with the signal lines. If the probe remains connected, the pulse output signal may be distorted due to
the inuence of capacitive impedance the interface has, resulting in the receiving instrument could fail to
receive the pulse signal accurately.
PRECAUTIONS with ANALOG OUTLINES
The analog type permits communications with the Smart Communication Unit at
any time. However, in parameter change according to the specification, considering
a possibility of erroneous setting which could disturb the operation of the receiving
instrument by a surge of power output, you are recommended to change the
parameters while stopping the fluid flow.

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6. INSTALLATION
6.1 Considerations on Installation
(1) Flush the piping assembly.
Flushing must be performed before meter installation. Install a short pipe in place of the meter at this time
(See diagram below).
BYPASS LINE
STRAINER
VALVE
SHORT PIPE
FLOW DIRECTION
(2) Install the meter free from pipe strains.
(3) The meter must be installed on the discharge side of the pump.
(4) If the meter is to be used under tank head, give a head greater than the pressure losses of the piping
system, strainer, meter, etc.
NOTE: Pressure losses of ULTRA UF-II and strainers are stated on the GENERAL SPECIFICATIONS.
(5) The meter installation is correct if the ow direction conforms to the arrow mark on the meter body.
(6) The strainer should be located upstream of, and as close to the meter as possible.
(7) Since the sensor in ULTRA UF-II operates on the principle of sensing changes in magnetic ux density,
it must be isolated from the inuence of any external magnetic ux. In order to minimize the inuence of
external magnetic ux, select an installation location at least 5 meters away from existing power equipment
and conductors - potential sources of creating large magnetic and electric elds, such as motors and
generators.
(8) In case electric heating is desired, consult OVAL.
(9) Lagging material, if used, must not cover the register and its adapter.
●Typical OVAL Flowmeter Installations
6.2 Standard Installation, Horizontal Line
(1) In case ow direction
is from Right to Left,
change places of
meter and strainer.
(2) Arrange piping so as
to facilitate drainage.
(3) Strainer should be
inspected on a regular
basis.
6.3 Standard Installation,
Vertical Line
(1) If the ow direction is from top
to bottom, change places of
meter and strainer.
(2) Installing the strainer at "B" will
make net reinstallation difficult
at cleaning; we recommend to
install the strainer at "A".
OUT
A
B
IN
6.4 Example of
Faulty Piping
Do not install the meter in
a position like this.
<<NOTE>> For outline dimensions and pipe connection dims., see
the approval drawing.
Bypass
Strainer
Register
IN OUT
* 1000mm
IN OUT
WRONG!
Marked * is the space required for dissembly and inspection.

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7. HOW TO CHANGE FLOW DIRECTIONS
CAUTION: Do not fail to remove power to the meter if the meter is of the type to
provide remote output.
To change ow directions, change the orientation of both the register and the owmeter body to the new ow
direction
REGISTER
(1) Take four hex socket head bolts (M6) with hex
wrench.
REGISTER
ADAPTER
CAREFULLY ROTATE
(2) Holding the register assembly in both hands,
carefully rotate it and then secure it with hex
socket head bolts in line with the new direction
of ow.
CAUTION:
- Rotate the register without
separating from the adapter.
- Do not attempt to rotate the register
more than one complete revolution.
NOTE : If the register has been separated,
restore the register to its original
condition before the change of flow
direction, retry the step (2) above (without
separating the register).
DON’T DO THIS!
Do not attempt to separate the register
like this to change ow directions.

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8. WIRING INSTRUCTIONS
8.1 Wiring Connections at Terminals
(1) Cables for field wiring
The following cables should be used unless otherwise specied:
Cables 1.25mm2 in conductor area and 8.5 to 12 mm in nished O.D. As to the number of conductors, select 2
to 4 according to your particular application. It is recommended that their shield be grounded at the receiving
instrument.
CAUTION: Register Model UA; In case of TIIS explosionproof type used under the
ambient temperature of 45°C or higher, use a cable resistant to the
temperature of 75°C or higher.
Register Model U8; In case of TIIS explosionproof type used under the
ambient temperature of 50°C or higher, use a cable resistant to the
temperature of 70°C or higher.
(2) Transmission length
The maximum transmission length is typically one kilometer.
NOTE : If it exceeds one kilometer, consult the factory.
(3) Inductive interference prevention
To minimize the possibility of stray current pickup, the eld wiring should be routed sufciently away from
existing power cables or power circuits.
(4) Considerations on connections
1) M3.5 terminal posts are used on the terminal block. Use crimp-style terminals that t the conductors
at the cable end.
2) Be sure to earth ground the preamplier's ground terminal.
3) Pitch down the cable from the cable entry so that rainwater will not have a chance to enter the equip-
ment through the cable.
4) In areas where lightning strokes are expected, provide a lightning arrestor for protection.
CAUTION
Make sure of the validity of meter (transmitter) and companion receiving instrument
combination by referring to their model numbers, serial numbers, etc. before you
make electrical connections.
8.2 Terminal Connections
(1) Take off four hex socket head bolts (402) on the
front face of register assembly and remove the
cover (401).
(2) Remove the front cover to gain access to the
4-post terminal block. Terminal identification
label is found on the back of front cover.
NOTE : Connect the external earth ground
terminal to instrumentation earth ground
before use.
NOTE : Pressuretight packings are not furnished
with non-explosionproof models and
models remote output is not available
(see page 5).
(3) Using crimp-style terminals, make good electrical
connections.
( Refer also to the wiring instructions of respective
receiving instrument instruction manual.)
REMOTE OUTPUT TERMINALS
EXTERNAL
GROUND TERMINAL
CABLE ENTRY
INTERNAL
GROUND TERMINAL
O-RING
FRONT
COVER
HEX BOLTS

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8.3 Wiring Connections, Register Type UA
(1) Current Pulse Output (2-wire system)
24VDC
TERMINAL
BLOCK
1
2
3
4
V
SIG
0V
24VDC
500Ω
max.
1
2
3
4
500Ω
max.
V
SIG
0V
G
G
TERMINAL
BLOCK
Made by OVAL Made by OVAL
NOTE : The circuit with OVAL products to accept
current pulses comes in two congurations
as shown above. Refer to the receiving
instrument instruction manual before
making connections.
(2) Analog Output (2-wire system)
1
2
3
4
＋
−
−
＋
ANALOG
INDICATOR
POWER
IN CASE OF
CURRENT
INPUT
TERMINAL
BLOCK
12 to 45VDC
NOTE : In case of voltage input, couple an
external load resistance (see the
load resistance range in Section
8.4).
(3) Open Collector Output (3-wire system)
1
2
3
4
V
SIG
0V
12 to 24
VDC
Max. 50mA
R
E ( 30VDC)
1ms (std.) or 50ms
Select R such that
the current is held
50mA max.
TERMINAL
BLOCK ≦
NOTE : Select load resistance R such that the current
owing into the transistor held within 50mA in
relation with source voltage E.
(4) Voltage Pulse Output (3-wire system)
1
2
3
4
V
SIG
0V
12 to 24VDC
1ms (std.) or 50ms
10 kΩ max.
1 kΩ
7V max.
1V min.
TERMINAL
BLOCK
(12V max.
where V=24V)
Regulated
Voltage
(5) Current Pulse + Analog Output (4-wire system)
1
2
3
4
−
−
−
*
G
12 to 45VDC
POWER SUPPLY
CAPACITY 60mA min.
ANALOG
INDICATOR
TOTALIZER
＋
＋
＋
TERMINAL
BLOCK
LOAD RESIST
The points
* Select the voltage input for the totalizer.
Make sure of the trigger level of voltage input and
determine the supply voltage and load resistance value.
NOTE :
(1) In OVAL receiving instruments, signal conversion
is performed with an internal load resistance. If
you build a system like the one shown here with a
commercially available totalizer, make sure of the
signal levels to the totalizer since signal is converted
from current pulses into voltage pulses according to
the formula of 4/20mA × load resistance.
(2) If you use an OVAL receiving instrument in the
conguration shown here, make sure of the current
carrying capacity of receiving instrument's power
supply. If it has a problem in current carrying
capacity, a separate power supply should be
provided for the analog indicator.
8.4 About Acceptable Load Resistance Range, Register Type UA
In the specication of two-wire transmission system
for analog and pulse signals, the power lines also
serve as signal lines.
The transmission loop requires a DC power supply.
If it is desired to connect an instrument in a loop,
the load resistance of both the instrument and
conductors must fall within the operating range as
shown in the graph at right.
Standard: Power supply voltage = 24 VDC
Load resistance = 250Ω
1650
(600)
300
012 (24) 45
SUPPLY VOLTAGE (V DC)
OPERATING
RANGE
LOAD RESISTANCE (Ω)

B-525-6-E
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<Smart Type>
8.5 Preamp-to-Receiving Instrument Hookup with Register Type U8
The 2-wire signal transmission system used in this owmeter furnishes DC power to the meter. It serves as the
power line and signal line as well with pulse or analog current output.
An OVAL receiving instrument can be coupled directly, but instruments in general which are designed to
accept a voltage signal input require a load resistor RL connected in series for voltage conversion. Since the
voltage signal level varies with the load resistance value, determine the load resistance value by referring to the
receiving instrument specications and the acceptable load resistance range shown below.
Communications with a PC (Smart Communication Unit) requires a 250 to 1000Ω load.
- In case a voltage input is fed to the receiving instrument
RL
＋
−
＋
−
＋
−
2
1
4
3＋
−
PC PC
DC POWER
VOLT SIGNAL
(TO RECEIVING
INSTRUMENT)
OPEN COLLECTOR
OUTPUT
30V, 50mA max.
FLOWMETER
REGISTER
GND
(SMART COMUNICATION UNIT)
OR HHC: EK10
(SMART COMUNICATION UNIT)
OR HHC: EK10
Output Voltage Signal (V) NOTE : With the relationship with supply
voltage E, select the load resistance
value RL such that the current
flowing into the transistor is held
below 50mA.
Pulse
Output
ON / OFF
(20mA×RL) / (4mA×RL)
Analog
Output
(4mA×RL)−(20mA×RL)
at 0 to FS
Fig. 8.1
0 12V 17.25V 45V
1000Ω
1571Ω
250Ω
33V
RL=E–12V
21mA
Supply Voltage E (VDC)
RL(Load Resist.)
Area: Operating range
Area: Acceptable Communication range
<Acceptable Load Resistance Range>
EXAMPLE: If supply voltage is 24V DC with
load resistance 250Ω, then a 1 to
5V DC output is obtained.
Fig. 8.2

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9. OPERATING INSTRUCTIONS
9.1 Flushing the Piping Assembly
Do not fail to remove the meter from the piping assembly and install a short pipe section in place of the meter.
Costly damage to the meter could result if you attempt to ush away construction debris and other foreign
matter with the meter installed.
CAUTION: Do not allow water to run across the meter, or it will cause internal
components to gather rust and in time, hinder smooth rotation of the
rotors.
9.2 Operating Considerations
(1) Read well the information stated on the nameplate before commencing operation and make sure the
operating conditions conform to the specication.
(2) Carefully follow the valve operations sequence given below (refer to the piping diagram below):
1) Shut off the valves (A) and (B).
2) Progressively open the valve (C) to allow the uid in the bypass line.
3) Slightly open the valves (A) and (B). If necessary, slightly close the valve (C). The owrate at this point is
correct if the register pointer moves slightly.
4) In applications where temperature exceeds 80°C, run the meter at least for 10 minutes in the conditions
(3) to ensure uniform heat distribution in the measuring chamber.
5) Following the preheating period above, progressively close the valve (C) in the bypass line and
progressively open the valves (A) and (B) until reaching the rated ow.
6) Flowrate should be regulated with the valve (B) downstream of the meter and should be held within the
rating.
(3) The strainer net should be inspected for condition and cleaned on a regular basis. On a new installation, in
particular, inspect daily rst and, according to the clogged condition of the net being observed, inspection
intervals may be reduced progressively to, say, once in two or three days.
BYPASS LINE
STRAINER
VALVE
SHORT PIPE
FLOW DIRECTION
A
B
C
BYPASS LINE
STRAINER
VALVE
SHORT PIPE
FLOW
DIRECTION

B-525-6-E
18
CAUTIONS
9.3 Precautions for Models without Battery Pack
(1) Totalized data is written for storage in a non volatile memory several seconds after the ow of a process
uid is stopped. Accordingly, a precaution to remember is not to attempt to turn off power while owing
the process uid, or turn off power simultaneously with process uid shutoff.
(2) If you shut off power after stopping the process uid, good practice is to turn it off 10 seconds or more
after process fluid shutoff. In applications where a sudden power shutdown or instantaneous power
interruptions is expected during metering, it is desirable to provide an optional battery pack.
(3) If the meter is to be used in the accounting eld, we recommend you to provide the battery pack.
CAUTIONS
9.4 About the Register Life
(1) Because of the life expectancy of internal components, such as the LCD and non-volatile memory, the
internal electronics is designed to be replaced in about 10 years. The electronics life depends on the
environment in which it is used; if any of the following operating conditions applies, we recommend you to
replace it as an assembly in ve to six years:
- High temperature environment.
- High temperature process fluid measurement.
- Field installation with widely varying temperatures.
- LCD counter display is exposed to the direct rays of the sun.
- Frequent process fluid flows and interruptions.
(2) Models with optional battery pack have a storage life of 10 years approx. after shipment, whether the
battery is consumed or not. In other words, even in applications where the register is powered from an
external source for most of the time and the battery current drain is considered negligibly small, battery
replacement is yet required due to its storage life.
Storage life may be reduced even more under such adverse environmental conditions as:
- High temperature environment
- High temperature process material measurement
- Cold region

B-525-6-E
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10. DISASSEMBLY AND INSPECTION
◎Although it depends on individual operating conditions, periodic disassembly and inspection should
be performed at least once a year.
CAUTION
1. Because the UF-II Flowmeter is a precision industrial instrument, disassembly
and inspection should be performed indoors as a rule. If it is desired to
disassemble and inspect it as installed in the field, an important precaution to
remember is to reduce the internal pressure of the piping assembly to a safe
level, shut off valves upstream and downstream of the meter fully, drain the
piping assembly and then place a suitable fluid receptacle directly below the
meter. Exercise care to keep individual members disassembled free from grit
and dust.
2. If the meter is of externally powered type, be sure to turn off power before you
disassemble.
10.1 Disassembly and Inspection Procedures
REMOVE THE DRAIN PLUG.
(1) Remove the flowmeter from the piping
assembly, drain the meter, and start working in
the following procedure.
103
(2) 1) Place the meter upright with the rear cover
(103) down (register faces up).
2) Unbolt four hex bolts holding the register,
using hex key.
(3) Holding the register with both hands, carefully
separate it.
(4) Take off eight tting bolts (117) with hex key and
remove the sealing ange (116). Then, separate
the signal generating magnet assembly.

B-525-6-E
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O-Ring
(5) Take off twelve fitting bolts (114) securing the
front cover, carefully lift and remove the front
cover vertically.
NOTE : Make sure of the presence of O-ring (105).
This precaution also applies at assembly.
Good practice is to attach it to the cover
with grease before installation.
Match mark
Match mark
(6) 1) Place the meter body with the flange face
down.
2) Take off twelve rear cover fitting bolts (114)
and remove the rear cover.
215
BOTTOM COVER
Transmission qear assembly
GROUNDWORKING
BLOCK
216
(7) 1) With the bottom cover (202) down, place the
meter body upright so that the transmission gear
assembly is accessible from top. Place working
blocks under the meter body as shown to hold
the bottom cover off the ground at this time.
2) Take off hex socket head bolts (216) and
remove the transmission gear (215).
217
NOTE : 1) Before loosening hex socket head bolts,
tuck a piece of waste between rotors to
prevent their turning.
2) The transmission gear is provided with
a socket head setscrew (217) as a non-
turn means. At assembly, tighten this
non-turn arrangement upon completion
of tightening hex socket head bolts.
201
219
(8) Take off hex socket head bolts (219) and remove
the top cover (201).
201
203, 204