Oval 50 User manual

1
Ins. No. B-149-4N-E
Meter Sizes 50, 52, 53, 55, 56, and 57
High Temp./Low Temp. Service and Jacketed
SMART ULTRA OVAL FLOWMETERS
Every SMART ULTRA OVAL is fabricated and shipped from our factory under stringent quality control. In
order to maintain its design performance throughout the life of the meter, 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 keep this manual at the eld
location for ready reference.
The standard, high temperature-service, low temperature-service, and jacketed type meters all have in
common the same specifications described in this instruction manual except for some differences in the
jacketed type on its piping procedure and operating precautions. Be careful to observe the instructions given
with a reminder "See also page 15 for the jacketed type".
◆About Meter Size Designation ◆
The size of OVAL positive-displacement owmeters is basically identied by a two-digit code. For complete
details, see Section 17 PRODUCT CODE EXPLANATION.
Meter size 50
Cooling tube provided
Meter size 57
Cooling tube provided
Meter sizes 52, 53, 55, 56
Heating tube provided

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CONTENTS
1. BEFORE YOU BEGIN ........................................................................................................................4
1.1 Conrming the Tag .........................................................................................................................4
1.2 Transportation Considerations .......................................................................................................4
1.3 Storage Considerations .................................................................................................................4
1.4 Structural Considerations ..............................................................................................................5
2. OPERATING CONDITIONS ...............................................................................................................5
3. GENERAL DESCRIPTION .................................................................................................................6
4. PART NAMES .....................................................................................................................................6
5. LCD COUNTER DISPLAY..................................................................................................................7
5.1 About "MODE" Switch ...................................................................................................................7
5.2 Display Functions...........................................................................................................................7
5.3 Display Mode Selection .................................................................................................................7
5.4 Total Counter Reset........................................................................................................................8
5.5 Considerations with Pulse Output Type.........................................................................................8
6. INSTALLATION...................................................................................................................................9
6.1 Considerations at Installation.........................................................................................................9
6.2 Standard Installation, Horizontal Line ............................................................................................9
6.3 Standard Installation, Vertical Line ........................................................................................................................................... 9
6.4 Example of Faulty Piping ...............................................................................................................9
7. HOW TO CHANGE FLOW DIRECTIONS ........................................................................................10
8. WIRING INSTRUCTIONS ................................................................................................................11
8.1 Wiring Guidelines ........................................................................................................................11
8.2 Terminal Connections...................................................................................................................11
8.3 Preamplier-to-Receiving Instrument Hookup.............................................................................12
9. OPERATING INSTRUCTIONS .........................................................................................................13
9.1 Operation .....................................................................................................................................13
9.2 Operating Precautions .................................................................................................................13
9.3 Precautions at Operation Shutdown............................................................................................14
9.4 About Register Life ......................................................................................................................14
9.5 Piping Instructions and Operating Precautions of Jacketed Meters ...........................................15
10. DISASSEMBLY AND INSPECTION ...............................................................................................16
10.1 Size 50 Meter Body Disassembly and Inspection......................................................................16
10.2 Size 50 Meter Body Assembly Procedure .................................................................................17
10.3 Sizes 52, 53, 55, 56, 57 Meter Body Disassembly and Inspection............................................18
10.4 Sizes 52, 53, 55, 56, 57 Meter Body Assembly Procedure........................................................19
11. REGISTER SWITCH FUNCTIONS AND PARAMETER SETTING ................................................20
11.1 Switch Names and Functions ....................................................................................................20
11.2 Individual Test Pin Functions......................................................................................................21
11.3 About Meter Factor ....................................................................................................................21

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12. SENSOR REPLACEMENT PROCEDURE.....................................................................................22
13. TROUBLESHOOTING....................................................................................................................23
14. EXPLODED VIEWS AND PARTS LIST ..........................................................................................24
14.1 Meter Size 50 Exploded View and Parts List .............................................................................24
14.2 Meter Sizes 52 and 53 Exploded View and Parts List ...............................................................25
14.3 Meter Sizes 55 and 56 Exploded View and Parts List ...............................................................26
14.4 Meter Size 57 Exploded View and Parts List .............................................................................27
15. GENERAL SPECIFICATIONS ........................................................................................................28
16. OUTLINE DIMENSIONS ................................................................................................................29
17. PRODUCT CODE EXPLANATION.................................................................................................30
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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1.2 Transportation Considerations
(1) To safeguard against damage during transit, transport your Smart Ultra OVAL to the installation site in the
same container used for transportation from the factory if circumstances permit.
(2) Smart Ultra OVAL 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 congured and adjusted. Do not attempt to remove the front cover to gain access
to its internal assembly.
1.3 Storage Considerations
If your Smart Ultra OVAL 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 Smart Ultra OVAL 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 Smart Ultra OVAL that has once been placed in service with clean air, N2gas, 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.
1.1 Confirming the Tag
Every Smart Ultra OVAL is assembled and adjusted
according to individual specifications. Product
code number and ratings are stated on the register
tag. Make sure that, by referring to the general
specifications on pages 28 and the product code
explanation on page 29, the ratings shown conform
to your particular specication.
1. BEFORE YOU BEGIN
Every Smart Ultra OVAL 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.
For any inquiries, contact your nearest OVAL designated sales ofce.
CAUTION: When you make inquiries, include the product name, model number,
product number, ratings and other pertinent information.
NAMEPLATE
(RATINGS SHOWN)

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1.4 Structural Considerations
(1) The register is of waterproof construction for
outdoor service.
(2) The register is type approved. Do not attempt to
replace component parts with others or make
any circuit modication.
(3) The pressuretight packing furnished constitutes
part of the flameproof construction. Do not
attempt to use any pressuretight packing other
than those furnished. The pressuretight packing
union should be tightened securely upon
completion of connections.
(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 fits the finished 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 allowed into the register wil cause
blurred display glass and functional trouble.
Precautions on cable lead-in fitting
(pressuretight packing), both explosionproof
and non-explosionproof models:
- Use a pressuretight packing that fits the finished
cable O.D.
- Tighten up properly to allow no clearance between
the pressuretight packing and the cable.
- If a pressuretight packing is not used, apply some
waterproof treatment to preclude any chance of
moisture getting into the equipment.
2. OPERATING CONDITIONS
To maintain the stated high accuracy and long
service life of SMART ULTRA OVAL flowmeter,
make sure that owrate, pressure, temperature and
viscosity are within the ratings as stamped on the
meter register nameplate. Do not fail to confirm
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.
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.
NOTE: Avoid such installation locations where
1. Not easy to access for servicing.
2. Large temperature variation and vibration.
3. Potential risk of submersion in water.
4. Corrosive gas atmosphere.
5. Not compatible with ex. construction.
6. Near sources of strong magnetic noises.
Register
Cable Lead-in
(Pressure-resistant
packing)
NOTE: Pressuretight packings are not
supplied with nonexplosionproof
models.
ULTRA OVAL 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
NOTES
1. When measuring other liquids, consult us.
2. Place the meter body (outer case) in a horizontal
position. For details, see instruction manual.

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3. GENERAL DESCRIPTION
Smart Ultra OVAL has been developed to meet the needs of precise owrate measurement. The local direct-
reading total counter is an all-electronic register built around a single-chip CPU. With the 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) Absence of any mechanically sliding components except for oval rotors contributes to long service life.
(2) Small wetted parts count and pocketless design makes this meter ideally suited for ow measurement of
chemical liquids.
(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 and the design is compact.
(6) A nonvolatile memory, both in the local totalizer type and externally powered type meters, retains
accumulated total in the event of power failure or when de-energized.
NOTE: With the use over an extended period of time, meter error will deviate more or less from the initial
point. Upon request, we may conduct an instrumental error testing once again and establish a
"new meter factor" in the scaler when your Smart Ultra OVAL is returned to the factory for periodic
inspection or for other reasons.
If you have any request, contact the supplier you purchased the product or our sales ofce.
4. PART NAMES
MODE SWITCH LCD COUNTER FRONT COVER REGISTER
FLOW DIRECTION
REAR COVER
SELECTOR
MAGNET
CONNECTING
FLANGE
METER BODY
COOLING TUBE
(OR HEATING TUBE)
PRESSURETIGHT
PACKING
POWER SIGNAL
Fig. 4.1

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5. LCD COUNTER DISPLAY
5.1 About "MODE" Switch
Removing 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 in
Fig. 5.1.
CAUTION
Do not fail to return the selector magnet
to 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.
5.2 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
5.3 Display Mode 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 "Measure" window at "View" 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 20). The display
scrolls forward through available information each
time you press this switch as shown in Fig. 5.1.
SELECTOR MAGNET
SELECTOR MAGNET
"MODE"
EXAMPLE OF READINGS
MODE SYMBOL
TOTALIZED FLOW
INSTANTANEOUS
ACTUAL FLOWRATE
% INSTANTANEOUS
FLOWRATE
8-DIVISION
BAR GRAPH
Fig. 5.1

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5.4 Total Counter Reset
Displayed total flow can be reset either by the display select switch SW1 (see Fig. 11.1 on page 20) or
through communications with the Smart Communication Unit. It your option is through communications, follow
the instructions outlined in the Smart Communication Unit EL2310 (or HHC: EK10) instruction manual.
NOTE: Show "Measure" window at "View" menu on the PC screen.
With the display select switch, then, you can reset the totalizer by holding the display select switch SW1
depressed for more than 3 seconds while the total ow is shown.
5.5 Considerations with 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 and while communications with the Smart Communication Unit continue. For 15 seconds
approx. after termination of communications, the pulse output and total counter also remain inoperative.
(2) Requirements for validating communications
Communications are made valid only when the following requirements are met:
- Flowrate at zero (There is no pulse output.)
- Within 15 seconds after power turn-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 next time. (The built-in indicator
will display as shown in ② in the gure below.)
To start ow measurement routine, turn 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
circumstances. To eliminate the possibility of such erratic extra counting, precautions should be taken by
either disconnecting the receiving instrument before starting communications, or recording the most recent
total reading and other important data on paper.
(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 influence of capacitive impedance the
interface has could go to the point of producing distorted signals in waveform and, as a result, the receiving
instrument would fail to receive pulse signals accurately.
CAUTION: PRECAUTIONS with ANALOG OUTPUT TYPE
The analog type permits communications with the Smart Communication Unit at any
time. However, if, in an attempt to alter current parameters, the meter is configured
by mistake such that the new parameters are incompatible with the specification,
resultant sharp changes in output may disturb the behavior of the receiving
instrument. It is good practice, therefore, to make parameter changes while the fluid
flow is at zero.
②
①
15 seconds after power on.
(Com Standby Mode)
Communication is started
within 15 seconds after
power on. (Com Mode)
Fig. 5.2 Display in Response to Power ON, Pulse Output Type

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6. INSTALLATION
6.1 Considerations at 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
(1) In case flow direction
is f rom R t o L, sw it ch
the 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, switch the places of meter
and strainer.
(2) Installing the strainer at "A" will
make net reinstallation difficult at
cleaning; we recommend to install
the strainer at "B".
6.4 Example of Faulty Piping
NOTE: For outline dimensions and pipe connection dimensions, see approval drawing.
OUT
IN
A
B
Marked * is the space required for disassembly
and inspection.
BYPASS
STRAINER
ULTRA OVAL
OUT
IN
*(1100mm)
WRONG!
OUT IN
(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 pressure greater than the losses with the piping
system, strainer, meter, etc.
NOTE: Pressure losses of the Smart Ultra OVAL and strainers are stated in 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 the Smart Ultra OVAL operates on the principle of sensing changes in magnetic ux
density, it must be isolated from the influence of any external magnetic flux. In order to minimize the
influence of external magnetic flux, select an installation location at least 5 meters away from existing
power equipment and conductors - potential sources of creating strong magnetic and electric elds, such
as motors and generators.
(8) In case electric heating is desired, consult the factory.
(9) In the heat retention work, aviod covering up the ns and heating tube with lagging material.
- Typical Smart Ultra OVAL Installations
6.2 Standard Installation, Horizontal Line
Do not install the meter in
a position like this.
"See also page 15 for the jacketed type".

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7. HOW TO CHANGE FLOW DIRECTIONS
CAUTION: Do not fail to turn power OFF if the meter is of remote output type.
To reverse the ow direction, change the orientation of both the register and owmeter body to the new ow
direction.
(1) Take off four hex socket head screws (M6) with hex wrench.
CAUTION
1. Rotate the register assembly without separating
it from the skirt.
2. Do not attempt to rotate the register assembly
more than one complete revolution.
(2) Holding the register assembly in both hands,
carefully rotate it and then secure it with hex
socket head screws in line with the new direction
of ow.
Size 50
Sizes 52, 53, 55, 56, 57
REGETER
ASSEMBLY
CAREFULLY
ROTATE. SKIRT
Don’t separate!
Do not attempt to change ow directions by
separating the register assembly like this.
NOTE: If you have separated the register assembly, first return it to the state before changing the flow
direction, then follow the correct procedure in step (2) (without separating the register assembly)
again to change ow directions.

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8. WIRING INSTRUCTIONS
8.1 Wiring Guidelines
(1) Cables for field wiring
The following cables should be used unless otherwise specied:
Use cables of conductor area 1.25mm2 and nished O.D. 12mm, selecting from 2 to 4pcs. according to your
application. It is recommended that their shield be grounded at the receiving instrument.
CAUTION: 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 us.
(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 equipment
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 (register) and 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 of register assembly and remove the cover
(401).
(2) Remove the cover to gain access to a 4-post
terminal block. Terminal identication is found on
the back of cover.
(3) Using crimped-lug terminals, ensure good
electrical connections.
HEX
WRENCH
COVER
HEX SOCKET
HEAD BOLTS
O-RING
REMOTE OUTPUT
TERMINALS
EXTERNAL GROUND
TERMINAL
INTERNAL GROUND
TERMINAL
NOTE:
1. Pressuretight packing is not furnished with non-
explosionproof models and non-output models
(see page 5).
2. Connect the external earth ground terminal to
instrumentation earth ground before use.
(Refer also to the wiring instructions of respective receiving instrument
instruction manual.)

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8.3 Preamplifier-to-Receiving Instrument Hookup
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 RLconnected 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 1000Ωload.
●In case a voltage input is fed to the receiving instrument
Output Voltage Signal (V)
Pulse
Output
ON/OFF =
(20mA × RL) / (4mA × RL)
Analog
Output
(4mA × RL) − (20mA × RL)
at 0 ro FS
NOTE: With the relationship with supply
voltage E, select the load resistance
value RLsuch that the current
flowing into the transistor is held
below 50mA.
Fig. 8.1
Supply Voltage (VDC)
Acceptable Load Resistance Range.
RL(Load Resist.)
0 12V 17.25V 45V
1000Ω
1571Ω
250Ω
33V
Area: Operating range
Area: Acceptable Communication range
R＝ LE−12V
21mA
EXAMPLE:
If supply voltage is 24V DC with load
resistance 250Ω, then a 1 to 5V DC
output is obtained.
（
（
Fig. 8.2
L
PC POWER
R
＋
−
VOLT. SIGNAL
TO RECEIVING
INSTRUMENT
＋
−
OPEN COLLECTOR
OUTPUT
30V, 50mA max.
FLOWMETER
REGISTER
GND
＋
−
2
1
4
3＋
−
(SMART COMMUNICATION UNIT)
(OR HHC:EK10)
PC
(SMART COMMUNICATION UNIT)
(OR HHC:EK10)
PC
RL

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9. OPERATING INSTRUCTIONS
9.1 Operation
At rst-time operation, carefully operate in the following sequence, allowing the ow within the ow range
specied. (Refer to the piping diagram below.)
(1) Shut off the valve (A) on the inlet side and the valve (B) on the outlet side and then open the bypass line
valve (C) to allow the uid in the bypass line, thereby removing weld chips, scales and other foreign matter
left in the piping assembly.
CAUTION: This is particularly important on new installations.
(2) Carefully and slightly at rst, open the valve (A) upstream of the meter progressively and then, slightly at
rst, open the valve (B) downstream progressively.
(3) Slowly close the bypass line valve (C) and make sure that the total counter in the register advances in
response. Maintain a owrate 10 to 20% of the maximum owrate (conrm it in the instantaneous owrate
display mode) at this time, allow the ow for more than 15 minutes and make sure that air in the piping
assembly has totally escaped.
In applications where temperature exceeds 60°C, run the system at least for 30 minutes in this state to
ensure uniform heat distribution in the measuring chamber.
(4) Following the break-in operation (preheating), shut off the bypass line valve (C) completely and open the
upstream valve (A) progressively until fully open and slowly open the downstream valve (B) until the rated
ow is obtained.
(5) Flowrate should be regulated with the valve (B) downstream of the meter and should be held within the
rating.
(6) 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 a week.
Ａ
Ｂ
Ｃ
BYPASS LINE
METER
STRAINER
VALVE
FLOW DIRECTION
9.2 Operating Precautions
(1) When changing flowrates
In applications where the flowrate varies or where
shutoff valve opening and closure takes place in
batch operation, avoid rapid changes in flowrate
across the meter.
Operating the meter at flowrates in excess of
the maximum allowable flowrate will nullify the
guaranteed accuracy, reduce the meter life and may
result in faulty conditions, such as the seizure of
bearings or the rotor-to-measuring chamber contact.
(2) Where the temperature of metered fluid
changes
Avoid rapid temperature changes in the meter.
Temperature changes of the uid in the meter should
be held within 3°C per minute.
Extra care should be used particularly when making
a ow measurement in batch operation without the
provision of heat tracing of the piping where the uid
temperature differs from atmospheric temperature.
If rapid temperature changes are anticipated, heat
trace the piping assembly as well as the meter.
EXCESSIVE
FLOW
RAPID FLOW
VARIATION
RAPID TEMPERATURE
CHANGES
"See also page 15 for the jacketed type".

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(3) Liquids of low steam pressure
Temperature and pressure of LPG, polyvinyl chloride
monomers or anything with low viscosity and low
steam pressure that are too ready to vaporize should
strictly be controlled.
During operation, the temperature of bearings in the
meter is usually higher than that of the metered uid.
Vapors around the bearings can be causes of faulty
conditions, including generation of unusual noise
and bearing seizure.
(4) Corrosive liquids
When you make a measurement of highly corrosive
liquids, such as nitric acid and sulfuric acid,
appropriate materials should be used for tanks
and piping assembly. Heterogeneous materials
originally contained in the metered uid or corrosive
substances liquated out from tanks and pipes of
inappropriate materials may lead to costly downtime,
as a result of locked rotors, for example, when they
are allowed into the measuring chamber.
CAUTION: If it is a jacketed model, see page 15.
9.3 Precautions at Operation Shutdown
(1) Valves should be closed progressively.
Rapid valve closure could, under certain piping conditions, cause a sharp pressure rise by water hammer, or
hydraulic shock, resulting in damage to the meter.
(2) Precautions against pressure buildup on closure
Complete closure of valves upstream and downstream of the meter makes the affected section a totally
enclosed chamber and could cause a rise of internal pressure due to a rise of atmospheric temperature,
resulting in an unexpected damage to the meter.
(3) Liquids ready to adhere or gel at zero flow velocity
Liquids that tend to adhere and solidify or gel at ow velocities around zero must thoroughly be washed away
from the meter interior by running cleaning uid before shutdown. Negligence of this instruction may leave the
meter as an immovable unit when the operator attempts to resume meter operation the next time.
CAUTION
9.4 About Register Life
Due to the life expectancy of components incorporated, such as the LCD and nonvolatile memory, the internal
electronics are designed to be replaced in about 10 years. The electronics life depends on the environment in
which they are used; if any of the following operating conditions applies, we recommend you to replace them
an assembly in ve to six years:
- High temperature environment.
- High temperature process uid measurement.
- Field installation with widely varying temperatures.
- LCD counter display is directly exposed to the rays of the sun (ultraviolet rays).
- Frequent process uid ow interruptions.
TAKE PRECAUTIONS
AGAINST BEARING SEIZURE!

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CAUTION
9.5 Piping Instructions and Operating Precautions of Jacketed Meters
Hot water or steam jacketed meters require piping work in the following manner:
(1) Piping to the meter body remains the same as that of standard meters (meters not jacketed).
(2) Adhere to the following instructions for the piping to the jacket:
Steam Jacketed
Basically, the piping should be so arranged that
steam ows in from the top and out from the bottom.
Provide steam traps at outlet ports (see figure
below).
⇩
Hot-water Jacketed
Basically, the piping should be so arranged that hot
water ows in from the top and out from the top (see
gure below).
⇩
(3) Although the measuring chamber is heat treated, due consideration should be taken not to give piping
elongation or contraction by sharp temperature changes or pipe strains.
Progressive heating is suggested at least four hours before commencing service operation.
(4) As for outline dimensions and tubing connection dimensions, see approval drawings.
(5) If heat tracing is desired, considerations should be taken to facilitate maintenance and servicing.
Make sure, if it is the case, that there is no liquid leaks when related components are covered with lagging
material.
(6) Lagging should be so provided that the top cover of strainer is easily accessible. Also it is necessary that
the strainer net be cleaned on a regular basis.
(7) Never attempt to lag radiator ns.
Lagging them will cause excessive heat buildup in the register and pulse generator, possibly leading to
costly downtime.
NOTE: As for outline dimensions and tube connection dimensions, see approval
drawing.
STEAM IN
OUT
FLOW
DIRECTION
Steam Jacketed Type, Horizontal Run
IN
OUT
FLOW
DIRECTION
HOT WATER
Hot Water Jacketed Type, Horizontal Run

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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: Because Smart Ultra OVAL 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 Smart Ultra OVAL. Exercise care to keep
individual components disassembled free from grit and dust.
CAUTION: Be sure to deenergize before you disassemble.
◆Meter Body Inspection ◆
Complaint and possible cause: Process fluid will not run. Jammed with scales, the oval rotors fail
to rotate, resulting in an interrupted fluid flow.
10.1 Size 50 Meter Body Disassembly and Inspection
METER BODY
HEX SOCKET
HEAD BOLTS
FRONT COVER O-RING HEX SOCKET
HEAD BOLTS
(2) With the front cover (register) removed, the
measuring chamber with oval rotors and other
components are now accessible.
(1) Take off all six front cover tting bolts (104) (M6),
using wrench.
With the bolts removed, the register integral with
the front cover is ready to be separated from the
meter body.
Be careful not to drop the register front cover
assembly.
ROTOR SHAFTS
ROTORS
MEASURING
CHAMBER
(3) Remove oval rotors (201) from the measuring
chamber and inspect them for condition.
(a) Inspect the oval rotors to see if they are jammed
with foreign solids.
(b) Check the rotors, shafts and other members for
wear.
(c) Inspect the measuring chamber and the inner
wall of front cover for damage or any other sign
of unusual condition.
Upon completion of these inspections, clean the
oval rotors, rotor shafts, measuring chamber and
front cover with clean water or suitable solvent
thoroughly.
CAUTION
1. Score marks, scratches, high spots due
to impressions, or other flaws should
be reconditioned flat with oil stone or
other tool.
2. If the areas which have been in contact
with rear cover jack bolts are distorted
outwardly, recondition it flat with oil
stone.

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10.2 Size 50 Meter Body Assembly Procedure
CAUTION: PRECAUTIONS BEFORE ASSEMBLY
Oval rotors, inner walls of the rotor shafts, inner wall of the measuring chamber, inlet and outlet ports should be
thoroughly washed clean, completely removing dust, grime and other foreign matter.
MATCH MARKS
1ST ROTOR SIG.
MAGNETS
IN
１
２
OUT
2ND ROTOR
FLOW DIR. ARROW AND
2ND ROTOR NO.
FLOW DIRECTION
FLOW DIR. ARROW AND
1ST ROTOR NO.
(1) Rotor Installation
Rotor installation is correct if the side where signal
generating magnets are embedded faces the register
(top in the measuring chamber) and the side with match
marks ( • ) ( • • ) faces the front cover.
Carefully install the rotors with the 1st rotor (match mark
" • ") on the shaft with "1" stamped on the outside of
measuring chamber and the 2nd rotor (match mark
" • • ") on the shaft with "2" stamped. Ensure that the
match marks are as shown in the inset.
回転子の回転方向
IN
OUT
Hot Water Jacketed Type, Horizontal Run
(2) Confirming the Rotor Gear Engagement
Hand rotate the rotors to make sure of correct gear
mask.
FRONT COVER O-RING HEX BOLTS
(REGISTER SIDE)
(3) Front Cover Installation
Firstly install O-ring (108) on the front cover. If the
O-ring is damaged or swollen with metered liquid, it
will not t in the groove. If such is the case, replace
with a new one.
Align the locating pin of front cover with its pin slot
in the meter body and, fitting the rotor shafts into
rotor shaft sockets in the front cover, force the meter
body until the locating pin ts rmly in the pin slot
in the meter body without slanting the front cover.
Install six front cover fitting bolts (M6) and tighten
them evenly until the front cover is closely in contact
with the meter body.
(4) Confirming Freely Rotation
With air or water, make sure to see that the rotors
move freely and that the register counts in response.
CAUTION
Rotation check should be performed at
low rotor r.p.m.
Violent rotor spinning may cause a
damage to the components, such as
bearing seizure.
CAUTION: Since the registers are not compatible each other, do not replace one
register with that of other meter.

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10.3 Sizes 52, 53, 55, 56, 57 Meter Body Disassembly and Inspection
CAUTION: Be sure to deenergize before you disassemble.
REAR
COVER
(1) Take off all rear cover tting bolts, using wrench.
REAR COVER
HEX BOLTS
TOP COVER
(2) Remove the rear cover to gain access to the top
cover.
(3) Using cross slot screwdriver, remove all four
bolts securing the top cover in place. Then, use
two of them to jack up the top cover, eventually
to remove it.
CAUTION
When jacking the top cover off, turn the
jacking screws evenly and alternately so
that the top cover not slant.
REAR
COVER GASKET
END PLATE
(4) With the top cover removed, the measuring
chamber with oval rotors and other components
are now accessible.
ROTOR SHAFT
REAR
COVER
TOP COVER
GASKET ROTORS
(5) Remove oval rotors and rotor shafts, in this order,
from the measuring chamber and inspect them
for condition. (The rotor shafts should be drawn
out straight.)
(a) Make sure to see if the oval rotors are
jammed with foreign matter.
(b) Check to see if the rotors, shafts and other
components are worn.
(c) Inspect if the measuring chamber and inner
wall of the front cover have any sign of
scratches or other damage.
Upon completion of these inspections, clean
the oval rotors, rotor shafts, measuring
chamber and front cover with cleans water or
suitable solvent thoroughly.
CAUTION
1. Score marks, scratches, high spots due to impressions, or other flaws should be
reconditioned flat with oil stone or other tool.
2. If the areas which have been in contact with rear cover forcing bolts are distorted
outwardly, recondition it flat with oil stone.

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10.4 Sizes 52, 53, 55, 56, 57 Meter Body Assembly Procedure
CAUTION: PRECAUTIONS BEFORE ASSEMBLY
Oval rotors, inner walls of the rotor shafts, inner wall of the measuring chamber, inlet and
outlet ports should be thoroughly washed clean, completely removing dust, grime and other
foreign matter.
NON TURN
PIN
ROTOR
SHAFTS
SHAFT
SOCKET
ROTORS
2ND ROTOR "2" MARKS
1ST ROTOR "1" MARKS
FLOW
IN OUT
MATCH MARKS
(2) Rotor Installation
Rotor installation is correct if the side where signal
generating magnets are embedded faces the
register (bottom of the measuring chamber) and the
sides with match marks ( • ) ( • • ) faces the rear
cover. Carefully install the rotors with the 1st rotor
(match mark " • ") on the shaft with "1" stamped on
the outside of measuring chamber and the 2nd rotor
(match mark " • •" ) on the shaft with "2" stamped.
Ensure that the match marks are in alignment as
shown in the inset.
ROTORS
TOP COVER
(4) Installing top cover and confirming smooth rotor rotation
With the locating pin of top cover in line with its pin
slot in the meter body and tting the rotor shafts into
their sockets in the top cover, force them against the
meter body until the locating pin ts in its slot in the
meter body without slanting the top cover.
Install top cover fitting bolts and tighten each of
them evenly until the top cover is rmly in contact
with the meter body.
At this point, allowing air or water, make sure to
see that the rotors move freely and that the register
counts in response.
CAUTION
Rotation check should be performed at low rotor
r.p.m. Violent rotor spinning may cause a damage
to meter components, such as bearing seizure.
REAR COVER
GASKET
(5) Rear Cover Installation
Firstly install the gasket on the rear cover. If the
gasket is found damaged, replace it with a new one.
Install rear cover fitting bolts and tighten them
evenly.
NOTE: We suggest to replace the gasket with a
new one at each disassembly.
CAUTION: Since the registers are not compatible each other, do not replace one
register with that of other meter.
(1) Rotor Shaft Installation
The non-turn pin end of each rotor shaft faces the
register (bottom of the measuring chamber). Install
the shafts, pin end first, into their sockets on the
bottom of measuring chamber (bottom of meter
body), forcing downward while turning each of them
with hands until they are rmly installed in position.
(Air in the sockets may resist to be compressed by
the shafts. So good practice is to hold the shafts
pressed down by hand for some time.)
(3) Confirming the Rotor Gear Engagement
Hand rotate the rotors to make sure of correct gear
mesh. At this point, they may be shaky more or less
as the shafts not fixed firmly. Exercise care not to
damage the rotors and inner wall of the measuring
chamber by forcing them to rotate.

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11. REGISTER SWITCH FUNCTIONS AND PARAMETER SETTING
11.1 Switch Names and Functions
(1) Using a hex key, take off four hex socket head
bolts securing the front cover.
O-RING
FRONT
COVER
HEX SOCKET
HEAD BOLTS
(2) Removing the front cover provides access to the
electronics unit.
TP-PIN
OUT 2 PIN
OUT 1 PIN
REV PINFWD PIN
MODE SELECT
SWITCH SW1
0V PICKUP POINT
EXTERNAL GND
TERMINAL EXT. OUTPUT
TERMINAL
SELECTOR MAGNET
HOLDER
INTERNAL GND
TERMINAL
PARAMETER REWRITE
PROTECT SWITCH
(“ON” TO INHIBIT REWRITE)
IN PIN PLS PIN
Fig. 11.1 Part Names of Electronics Unit