Oval Ultra Oval LW76E User manual

1
Ins. No. B-320-2-E
Every OVAL owmeter is fabricated, inspected, and tested under stringent quality control prior to shipment
from the factory. In order to maintain its design performance throughout its life, this manual offers the operator
the necessary instruction, 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.
◆About Meter Size Designation ◆
The size of OVAL positive-displacement owmeters is basically identied by a two-digit
code.
Sizes 28, 29, 31, and 60
Double Case Construction
Size 29
Single Case Construction
Sizes 60 and 31
Single Case Construction
Meter Sizes: 28, 29, 31 and 60
Register Model: LW76E (two-step open/two-step shutoff)
Batch controller equipped ULTRA OVAL

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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 Operating Precautions ...................................................................................................................5
2. OPERATING CONDITIONS................................................................................................................6
3. GENERAL ...........................................................................................................................................6
3.1 General Description .......................................................................................................................6
3.2 Features and Functions..................................................................................................................7
3.3 Part Name ......................................................................................................................................8
3.4 About Safety Features....................................................................................................................9
4. FLOWMETER INSTALLATION.........................................................................................................11
4.1 Considerations at Installation.......................................................................................................11
4.2 Standard Installation, Horizontal Line ..........................................................................................12
4.3 Standard Installation, Vertical Line ........................................................................................................... 12
4.4 Example of Incorrect Installation.................................................................................................. 12
4.5 How to Change Display Orientations (changing ow directions).................................................12
5. AIR SIGNAL LINE CONNECTIONS.................................................................................................13
5.1 System Conguration with LW76E Register Equipped Meter
(1-step open/2-step close or 2-step open/2-step close).............................................................13
5.2 Air Signal Line Connections .........................................................................................................13
5.3 Operation Time Chart and Pneumatic Circuit ..............................................................................14
6. ABOUT DISPLAY AND PUSHBUTTONS ........................................................................................16
6.1 Display Functions.........................................................................................................................16
6.2 Pushbutton Inspection and Cleaning........................................................................................... 17
6.3 Pushbutton Functions .................................................................................................................18
6.4 Switch Functions.......................................................................................................................... 19
6.4.1 Selecting Add and Subtract Counter ..................................................................................... 19
6.4.2 Selecting Setup and RUN Mode............................................................................................ 19
7. RECONFIGURATION .......................................................................................................................20
7.1 Establishing a Batch Setpoint...................................................................................................... 20
7.1.1 Procedure (batch setup mode) ..............................................................................................20
7.1.2 Example of Establishing a Batch Setpoint............................................................................. 21
7.2 Parameter Setup (cumulative total, scaler factor, frequency division, initial and nal
settings, missing pulse detection, overshoot setting)..................................................................22
7.2.1 Operation in the Setup Mode.................................................................................................23
8. OPERATION .....................................................................................................................................24
8.1 Preparation Before Operation ...................................................................................................... 24
8.2 Preoperational Checks ................................................................................................................ 24
8.3 Operation with Actual Flow.......................................................................................................... 25
8.4 Operating Precautions ................................................................................................................25
8.5 Precautions at Operation Shutdown............................................................................................ 26
8.6 Strainer Inspection .......................................................................................................................26
8.7 Starting a Batch Process .............................................................................................................27
8.7.1 Preoperational Checks Before a Batch Process.................................................................... 27
8.7.2 Starting a Batch (procedure) .................................................................................................27
9. INSPECTION ....................................................................................................................................29
9.1 Register Inspection ......................................................................................................................29
9.2 Register Disassembly .................................................................................................................. 30

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9.3 Meter Body Disassembly and Inspection .................................................................................... 32
9.3.1 Single-case Construction Meter Body Disassembly and Inspection.....................................32
9.3.2 Single-case Construction Meter Body Assembly Procedure.................................................33
9.3.3 Double-case Construction Meter Body Disassembly and Inspection ................................... 34
9.3.4 Double-case Construction Meter Body Assembly Procedure ...............................................35
10. ABOUT THE BATTERY PACK .......................................................................................................36
10.1 Battery Life.................................................................................................................................36
10.2 Battery Pack Replacement ........................................................................................................36
11. TROUBLESHOOTING....................................................................................................................37
12. EXPLODED VIEWS AND PARTS LIST ..........................................................................................40
12.1 Size 29 Single Case Construction Meter Exploded View and Parts List ................................... 40
12.1.1 Size 29 Single Case Construction Meter Exploded View .................................................... 40
12.1.2 Size 29 Single Case Construction Meter Parts List ............................................................. 41
12.2 Size 60 Single Construction Meter Exploded View and Parts List.............................................42
12.2.1 Size 60 Single Construction Meter Exploded View.............................................................. 42
12.2.2 Size 60 Single Case Construction Meter Parts List ............................................................. 43
12.3 Size 31 Single Case Construction Meter Exploded View and Parts List ................................... 44
12.3.1 Size 31 Single Case Construction Meter Exploded View .................................................... 44
12.3.2 Size 31 Single Case Construction Meter Parts List ............................................................. 45
12.4 Sizes 28, 29, and 31 Double Case Construction Meter, 10K type Exploded View and Parts List.............. 46
12.4.1 Sizes 28, 29, and 31 Double Case Construction Meter, 10K type Exploded View..............46
12.4.2 Sizes 28, 29, and 31 Double Case Construction Meter, 10K Type Parts List ......................47
12.5 Size 60 Double Case Construction Meter, 10K type Exploded View and Parts List.................. 48
12.5.1 Size 60 Double Case Construction Meter, 10K type Exploded View................................... 48
12.5.2 Size 60 Double Case Construction Meter, 10K Type Parts List...........................................49
12.6 Sizes 28, 29, and 31 Double Case Construction Meter, 30K type (F3) Exploded View and Parts List ................ 50
12.6.1 Sizes 28, 29, and 31 Double Case Construction Meter, 30K type (F3) Exploded View....... 50
12.6.2 Sizes 28, 29, and 31 Double Case Construction Meter, 30K Type (F3) Parts List ............... 51
12.7 Size 60 Double Case Construction Meter, 30K type (F3) Exploded View and Parts List................ 52
12.7.1 Size 60 Double Case Construction Meter, 30K type (F3) Exploded View............................ 52
12.7.2 Size 60 Double Case Construction Meter, 30K Type (F3) Parts List .................................... 53
12.8 Register Exploded View and Parts List......................................................................................54
13. GENERAL SPECIFICATIONS ........................................................................................................55
"NOTE", "CAUTION" and "WARNING" in this manual are to promote awareness of users and each
word has meaning as follows.
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 OVAL with a batch control feature 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, find the
respective sections from "CONTENTS" on pages 2 and 3.
For any inquiries, contact your nearest OVAL sales ofce.
CAUTION: When you make inquiries, include the product name, model number,
product number, ratings and other pertinent information.
1.1 Conrming the Nameplate
Every Ultra OVAL is assembled and
adjusted according to individual
specications.
Product code number and ratings
are stated on the register nameplate.
Make sure that, the ratings shown
conform to your particular specication.
1.2 Transportation Considerations
(1) To safeguard against damage during transit, transport the Ultra OVAL to the installation site in the same
container used for transportation from the factory if circumstances permit.
(2) 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 remove its front cover to gain access to its
internal assembly except for reconguration.
1.3 Storage Considerations
If your 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 the 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 Ultra OVAL 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 remove the battery pack from the
register.
NOTE: See Sec. 10.2 "Battery Pack Replacement" on page 36.
NAMEPLATE
(RATINGS)
ULTRA OVAL MADE IN JAPAN MNPJ-237
OVAL Corporation
MODEL
MAX PRESS.
FLOW RANGE
CONT.
~
~
FULL SCALE TEMP. PULSE UNIT
SERIAL No.
FLUID
DATE SIZE
METER FACTOR
TAG. No
INT.
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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1.4 Operating Precautions
(1) Operating precautions to be observed
1) Do not attempt to change component parts or modify circuits of the register.
2) Do not paint out the warning label or remove warning and specication labels printed or attached to the
register. Applying a coat of paint to synthetic resin components, such as pushbuttons, may possibly
result in malfunction of the affected components by the solvent it contains.
3) Since the solenoid valve to control the operation signal of the shutoff valve installed in the owmeter
register is of an internal pilot type, proper switching of the signal may be hindered if the supply air
pressure connected to "IN" port of the solenoid valve unit falls below 0.20MPa.
For this reason, do not use it for controlling an emergency shutoff valve or similar equipment.
4) To prevent accident possibly caused by the failure of the owmeter counter or continuous ow valve
of this owmeter, be sure to install a safety valve such as manual valve in the OUT side piping of the
continuous ow valve. The safety valve must be closed when the owmeter is not in operation.
(2) About the quality of air source (uid for actuating the shutoff valve [air, nitrogen, etc.])
(See JIS B 8370 "Guidelines to Pneumatic Systems.")
1) Avoid using compressed air that contains synthetic oil with chemicals or other organic solvent, sodium,
corrosive gas, etc. which may cause component parts failure or malfunctioning.
2) Use clean, dry air that does not condensate at operating temperatures in the environment where the
product is placed in service.
Provide an air lter at the air source (ltration accuracy 5 μm approx. or ner).
3) Supply pressure to the owmeter register is 0.20 to 0.69MPa. Adjust the pressure to somewhere in this
range with reducing valve or similar regulator.
4) A solenoid valve to control the operation signal of the shutoff valve is incorporated in the flowmeter
register.
Large quantities of drain may cause malfunctioning of the solenoid valve and other pneumatic equipment
used besides environmental pollution. Careful considerations must therefore be made in handling of drain.
In case such handling is difcult, good practice is to provide an auto drain equipped lter.
5) Powder carbon produced from the compressor can build up on valve interior in quantities leading to
valve malfunction. To get around this problem, select a compressor oil that produces less powder
carbon and/or provide an oil mist separator.
(3) About the operating environment
In low temperature applications, due precautions should be taken against solidied or frozen drain or water
inside the solenoid valve. In a case like this, we recommend to provide a dehumidier, such as a dryer, to
remove uid to be drained and water content.
NOTE: The above mentioned compressed air purication equipment are available from OVAL as an option.
(4) About piping
1) Preparation for installation
Prior to installation, thoroughly remove construction debris, such as metal chips, cutting uid, and other
foreign matter remaining in the piping system by air blow (ushing) or cleaning.
2) Wrapping the seal tape
When screwing in pipes and fittings, exercise care to preclude metal
chips produced in pipe screw-thread cutting and fragments of seal tape
from entering the valve. If thread seal tape is used, leave 1.5 to 2 threads
to remain unwrapped.
3) Before making pipe connections
Refer to the instruction manual to ensure that pipes are connected to the
right ports.
4) For air supply to actuate shutoff valve, use φ6 × φ4 copper tubes.
(5) About maintenance and inspection
(Refer to JIS B 8375 "4- and 5-port Pneumatic Solenoid Valves".)
In order to ensure normal operation of the register, do not fail to test it by pressing the start/stop button of
the register alternately several times without owing the process uid. This test will indicate whether the
solenoid valve in the register works properly or not.
Wrap This Way
Leave Two Threads
Unwrapped
Seal Tape

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2. OPERATING CONDITIONS
To maintain the stated high accuracy and long service life of the Ultra OVAL, make sure that owrate, pressure,
temperature and viscosity are within the ratings as stamped on the meter register tag (page 4).
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 (-10 to +60°C).
(3) Avoid such installation locations as:
1) hardly accessible for maintenance and inspection.
2) temperature variation and/or vibration is excessive.
3) potential danger of immersion in water.
4) corrosive gases exist.
5) not compatible with the explosionproof construction of this meter.
6) large electromagnetic noises are highly expected.
3. GENERAL
3.1 General Description
The Ultra OVAL is a high-precision owmeter combined with a user friendly batch controller for use in the eld.
Its electronic register is programmable with front pushbuttons for batch processes (or quantities of the process
uid to be delivered). When used in combination with a pneumatic shutoff valve, you can build an automatic
metering system which opens the shutoff valve upon depression of the start button and shuts it off when a
preset quantity of the process uid is reached.
The register combined with this meter is the LW76E which features a two-step open, two-step close (or one-
step open, two-step close) arrangement. Applications include batch processes in chemical plants, blending,
lling, or clearance processes in the food, pharmaceutical, paint, petroleum, and chemical products industries
to save time and effort, streamline processes, and achieve product uniformity.
In this meter, an amorphous sensor detects the fluid flow by picking up the magnetic fields of permanent
magnets embedded in the oval rotors of proprietary contoured gear profile. As a result, high reliability of
achieved.

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3.2 Features and Functions
(1) Long life
Absence of mechanically sliding components except for oval rotors, solenoid valve and control buttons
contributes to long service life. Small wetted parts count and pocketless design makes this meter ideally
suited for ow measurement of chemical liquids.
(2) Electronic register saves time and effort in metering operations.
1) Figures in the LCD display are 12.7mm high for easy readability.
2) Batch setpoint (6-digit) and cumulative total count (8-digit) are selectable with a switch for management
of totals.
3) Front pushbuttons select the desired batch setpoint.
4) Add or subtract counter in the batch process is selectable (subtract counter is standard).
5) Advance signal can be set at any point in a range from 0 to 999 counts.
6) The duration of missing ow signal pulses can be set at any point from 0 to 15 seconds.
7) An overshoot (overmeasurement) can be set at any point from 0 to 99 counts.
8) Can resume a metering cycle for the remainder of a batch that has been interrupted by an emergency
stop.
9) Can review the batch setpoint upon depression of
START
▲
button while a batch cycle is in progress.
(3) Installation location
The register is of waterproof construction (JIS C 0920 Weathertight) for installation outdoors. Its intrinsically
safe explosionproof construction (Exia II BT3) permits installation in hazardous locations (Divisions 0, 1, and
2 area) (explosionproof models only).
(4) Field work required
1) Battery powered, it eliminates the need for an external power source (eld wiring not required). The
built-in battery is good for four years (battery life may vary according to the operating conditions). (A
low battery alarm "BATT" ickers in the front LCD when the battery is near to its end.)
2) Replacing the existing OVAL register (LW76) with this new model does not require another air source;
the existing shutoff valve remains serviceable.
(5) Affords adequate protection in batch processes
1) In the model equipped with LW76E register, the shutoff valve opens and closes moderately by the initial
and final flowrate control signals: the arrangement eliminates static electricity buildup in the piping
assembly and in the tank at startup, and prevents hydraulic shock at valve closure.
2) If something erratic (missing owrate signal, for example) occurs in the batch process, a shutoff valve
closure signal is automatically generated.
3) The operator can monitor shutoff valve operation signals, alarmed conditions, and other status with
front LCD illumination in its 1st and 8th digit segment.
4) In the event the battery has run down during the batch process, safety is maintained by shutting off the
valve automatically. Parameters and variables are retained in the E2PROM (nonvolatile memory): you will
not be required of setting them up all over again after battery pack replacement.
(6) Simplied maintenance
The electronics is of modular and printed circuit board construction, housed in a plastic casing; pneumatic
circuitry (solenoid valve assembly), control buttons, and battery pack are of independent units for maximum
ease of maintenance.
⇨NOTE:
With the use over an extended period of time, meter error will deviate more or less
from that in initial factory calibration. Upon request, we may conduct an instrumental
error testing once again and establish a "new meter factor" in the scaler when your
Ultra OVAL is returned to the factory for periodic inspection or for other reason.

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Fig. 3.1
3.3 Part Name
Explosionproof Certification
Plate
NOTE: Shown here is the appearance of the register
combined with Size 29 single-case meter.
Exhaust
View "A"
LCD Display
(Total counter and
operation status) Unit of Total Plate Front Cover Fitting
Hex Soc. Hd. Bolt
OUT1 OUT2
IN
A
Air Signal
Connections
Cooling Tube
(or Heating Tube) Flow Direction Arrow
Meter Body
Flowmeter
Rear Cover
Register Front Cover
Register Body
(Battery pack built in)
Connecting Flange
EXT. GND Terminal
Label (Ratings shown)
STOP Button
(ROT. Button)
RESET Button
( Button)
▲
START Button
(▲Button)
Nameplate (Ratings shown)

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3.4 About Safety Features
The register is provided with the following safeguards:
(1) On detection of missing pulses
Either condition 1) or 2) causes the indicator "ALM" in the display to light and the shutoff valve to close
automatically for safety’s sake.
1) The register fails to count any pulses within preset missing pulse period (PL) from the moment a batch
process started.
2) Counting pulses is interrupted during a batch process and remains interrupted beyond preset missing
pulse period (PL).
The electronics starts missing pulse detection 5 seconds from the start of a batch process; actually a
missing pulse setpoint (PL) + 5 seconds is required for this function to go into effect.
Large totalizer units of measure (weights of the total count) by frequency reduction or other processing may
require more time to update the count, but such a condition will not trigger a missing pulse detection alarm.
If "0" is chosen for missing pulse setpoint (PL), the capability to detect missing pulses will remain disabled.
For manual batch processing, therefore, we recommend you to use a setpoint at "0."
(2) On detection of an overshoot (overmeasurement)
An overshoot of measurement at the end of a batch does occur due to some time lag in shutoff valve
actuation (on closure). An indicator "ALM" in the display lights when the register counts more than the
anticipated overshoot count (oV).
NOTE: While "0" is chosen for anticipated overshoot count (oV), the overshoot detection feature remains
disabled.
(3) On detection of a low battery
A weak built-in battery tells the operator with a blinking alarm "BATT" in the display. When the battery
has run down nearly to its end, the "ALM" comes on, the shutoff valve closes automatically (if in an open
position) and, at the same time, the variables (total count in a batch process and cumulative total count) are
evacuated to a nonvolatile memory.
From this moment onward, valve operation will remain inoperative (
START
▲
button will not respond). As a
rule of thumb, it takes about 8 days from a blinking "BATT" alarm till a stay-on "ALM." It is suggested that
the old battery be replaced with a new one during this period.
NOTE: A low battery when left unused for some time may restore its energy to some extent and may be
used for a batch job again, only for an unpredictable length of time. Do not fail to replace a battery
that has once caused the "ALM" to come on.

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Messages on Detection of Parameter Errors
↓: Press
STOP
ROT.
.
⇔: Shows alternately.
(Parameters) ↓
◦ Batch setpoint (preceded by "b") .............. ｂ □ □ □ □ □ □ □⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Accumulated total to batch setpoint ......... □ □ □ □ □ □ □ □⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Accumulated total...................................... □ □ □ □ □ □ □ □ ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Scaler factor .............................................. Ｆ □ □ □.□ □ □ □ ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Frequency reduction.................................. ｄ □ □ □ □ □ □ □⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Initial setting .............................................. ｏ Ｐ □ □ □ □ □ − ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Final setting ............................................... ｃ Ｌ □ □ □ □ □ − ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Missing pulse setpoint............................... Ｐ Ｌ □ □ □ □ □ □ ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
↓
◦ Overshoot setpoint .................................... ｏ Ｖ □ □ □ □ □ − ⇔ Ｄ Ａ Ｔ Ａ Ｅ ｒ ｒ
(4) Upon detection of a parameter error
in response to any error in parameter setting, an alarm message "DATA Err" appears in the display.
1) Each time
STOP
ROT.
button is depressed in this case, the display scrolls through available data so that the
operator can conrm which parameter is in trouble (see Figure below).
2) Following acknowledgement, press
RESET
▲
.
(A message "DATA Err" will then disappear and all data will be reset.)
3) Following the resetting, set parameters and batch setpoint again according to the specications.
(Follow the procedure described in Section 7 "RECONFIGURATION".)

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4. FLOWMETER INSTALLATION
4.1 Considerations at Installation
(1) The LCD display of Ultra OVAL equipped with
a batch controller is designed to be seen down
from upper point, rather than at the same level.
Take this into consideration when you decide its
installation height.
(LEVEL)
ULTRA OVAL REGISTER
WITH BATCH CONTROLLER
Fig. 4.1
(2) Flush the piping assembly.
Flushing must be performed before meter installation. Install a short pipe in place of the meter at this time (see
Fig. 4.2 below).
(3) After ushing, remove the short pipe section from the pipeline and install the meter in place, exercising care
to avoid any pipe strain on the meter.
(4) The meter must be installed on the discharge side of the pump.
(5) If the meter is to be used under tank head, give a head pressure greater than the total pressure losses of
the piping system, strainer, meter, and other associated equipment.
NOTE: Pressure losses of the Ultra OVAL with a batch controller and strainers are stated in the
GENERAL SPECIFICATIONS.
(6) The ow direction arrow indicated on the meter body should point in actual direction of ow.
(7) The strainer should be located upstream of, and in close proximity of the meter.
(8) Since the sensor in the Ultra OVAL detects the changes in magnetic ux density, it must be isolated from
the inuence of external magnetic elds.
In order to minimize the inuence of external magnetic elds, select an installation location at least 5 meters
from existing power equipment and conductors - potential sources of creating large magnetic and electric
elds, such as motors and generators.
(9) If electrical heating is considered, consult the factory.
(10) If heat retention is desired, do not allow lagging material to cover up the meter adapter and register
assembly.
● Typical examples of Ultra UF-II installation are shown on the next page.
BYPASS LINE
STRAINER
VALVE
FLOW DIRECTION
SHORT PIPE
SHUTOFF
VALVE
Fig. 4.2

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4.2 Standard Installation, Horizontal Line
(1) In case flow direction is from R to L, change places of
meter and strainer.
(2) Arrange piping so as to facilitate drainage.
(3) Strainer should be inspected on a regular basis.
Marked * is the space required
for disassembly and inspection.
BYPASS
STRAINER
REGISTER
ADAPTER
*
（1000mm）
OUT
4.5 How to Change Display Orientations (changing ow directions)
REGISTER
CAREFULLY ROTATE
ADAPTER
(1) Take off four hex socket head screws (M6) with
hex wrench.
(2) Holding the register in both hands, carefully
rotate it to a desired orientation of the new ow
direction, and secure it with hex socket head
screws.
CAUTION Never rotate the register assembly more than one complete revolution.
Do not attempt to separate the register assembly from the meter body
to change the flow directions.
4.3 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 difcult at cleaning; we
recommend to install the strainer at "A".
OUT
IN
B
A
4.4 Example of Incorrect Installation
(1) Do not install the meter in a position like this.
OUT
!
WRONG
NOTE:
For outline dimensions and pipe
connection dims., see approval
drawing.

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5. AIR SIGNAL LINE CONNECTIONS
5.1 System Conguration with LW76E Register Equipped Meter
(1-step open/2-step close or 2-step open/2-step close)
NOTE: For simplicity's sake, the Ultra OVAL (*) with a batch control feature is shown here in an upright
position. In practice, the owmeter should be installed in the physical orientation shown in Sections
4.2 and 4.3.
Flow Direction
IN
OUT 1
EXH
ULTRA OVAL with Batch Controller
(LW76E)
Filter/Reducing Valve
OUT 2
To Pump
(Contact-closure
signal)
SV MV
FPD1
Air Press. to Valve *2
Signal Air Press.
0.20 to 0.69MPa
Air
Directional
Valve
Double Torque Cylinder
Ball Valve
※1
Note: *2 depends on the specification of the valve.
Fig. 5.1
NOTE: When combined with OVAL pneumatic-electrical switch (Model FPD1), the pump can be
interlocked.
For complete details, see the pneumatic-electrical switch instruction manual.
5.2 Air Signal Line Connections
The register contains a pneumatic circuits
to which air signal lines of copper tubing
are connected through their ports below the
register body.
- Air pressure: 0.20 to 0.69MPa
(adjusted to shutoff valve
specication.)
(Must be clean air)
- Air tubing diam.: Use φ6 × φ4 copper tubing.
(Bite-type couplings
(Rc1/8) are provided.)
- Output air connections
OUT 1: Main valve (MV) open signal
OUT 2: Small valve (SV) close signal
IMPORTANT: At the supply air
connection, be sure to
provide a reducing valve
furnished with a filter
(Model 1301-8002).
EXTERNAL
GND TERMINAL
EXH
(EXHAUST)
OUT 1 OPEN SIGNAL
IN AIR SUPPLY
OUT 2 CLOSE SIGNAL
Fig. 5.2

B-320-2-E
14
5.3 Operation Time Chart and Pneumatic Circuit
■Description of Operation Time Chart
NOTE: Operation can best be understood by referring to the chart below.
Upon depression of
START
▲
. button, the shutoff valve opens to a predetermined position (initial owrate). When a
predetermined quantity (from point A to point B) has been delivered, the valve opens fully; when metering has
reached point C, the valve automatically throttles the ow and maintains a predetermined valve position (nal
owrate).
At point D (batch setpoint), a closure signal (full closure signal) is generated.
However, due to a time lag in valve actuation, inherent to the type of valve used, the valve actually closes at
point E. Since the amount from point D to point E can be anticipated (an overshoot or over measurement),
we determine the right batch setpoint corrected for this overshoot. If an overshoot exceeds a predetermined
quantity, the register sets off an alarm.
Safe and precise measurement is thus achieved. In practice, we preselect valve positions A → B and C →D on
the part of the shutoff valve.
NOTE: In a model equipped with LW76E register, manual interruption while the valve is fully open causes
the shutoff valve to close in one step and, when operation is resumed for the remaining batch
process, it opens up in one step.
<Operation Time Chart>
INITIAL FLOW CONTROL
(INITIAL SETTING)
OUT 2
(SV)
OUT 1
(MV)
ON
OFF
ON
OFF
START SIGNAL
VALVE POSITION
(FLOWRATE)
INITIAL FLOWRATE
A
B
C
D
E
TIME ANTICIPATED
OVERSHOOT
END OF A BATCH
FINAL FLOWATE
UPPER LIMIT FLOWRATE
STOP SIGNAL
FULL OPEN SIGNAL
ONE-STEP OPEN SIGNAL
TARGET BATCH SET VALUE
FINAL FLOW CONTROL
(FINAL SETTING)
NOTE: Shown in this chart is the 2-step open, 2-step close arrangement. In
the one-step open or one-step close mode, set both the initial and
nal setting to 0.
Fig. 5.3

B-320-2-E
15
■Pneumatic Circuit
LW76E
EXH
EXH
OUT2
IN
OUT1
SV
MV
V
1
V
2
V 3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V 1
V 2
V
3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V 1
V
2
V 3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V 1
V 2
V 3
IN
IN
IN
IN
Coupled with a double torque cylinder ball valve
<Not in operation>
<Metering under
initial flow control>
<Metering through
fully open valve>
<Metering under
final flow control>
SHUTOFF VALVE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SIGNAL
AIR SOURCE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
Fig. 5.4
Metering Action Output Signal Shutoff Valve
OUT1 OUT2 V1V2V3Valve position
Not in operation 0 0 0 0 1 Closed
Metering (initial ow control) 0 1 1 0 1 SV open
Metering (fully open) 1 1 1 1 0 SV, MV open
Metering (nal ow control) 0 1 1 0 1 SV open
NOTE: Pressure at individual port
0 - Air pressure not supplied
1 - Air pressure supplied

B-320-2-E
16
6. ABOUT DISPLAY AND PUSHBUTTONS
<Front View of Display>
OPERATION
INDICATOR
RUN, OUT
OPERATION INDICATOR
ALM, COUNT, END
READING
UNITS PLATE
START BUTTON (GREEN)
(▲BUTTON)
STOP BUTTON (RED)
(ROT. BUTTON)
RESET BUTTON (WHITE)
( BUTTON)
▲
Fig. 6.2
The display is provided with the following functions:
Table 6.1 Operation display function
INDICATION DESCRIPTION Illuminated segment
(See gure on next page.)
RUN Blinks while the register is in operation. a
OUT Comes on in response to a shutoff valve operation signal
output (MV, SV). b, c
ALM Stays on (missing pulses, excessive overshoot, low
battery alarm) until reset. d
COUNT Comes on in response to pulses incoming to the total
counter (blinks in synchronism with incoming pulses). e
END Comes on at the end of a batch process. (Stays on until
the batch setpoint is reset.) f
BATT Blinks to indicate a low battery. g
NOTE: For batch setup mode, see paragraph 7.1.1 in page 20.
LCD DISPLAY
OPERATING BUTTONS
REGISTER
Fig. 6.1 Pressing a Button
6.1 Display Functions
Three pushbuttons - STOP/ROT., RESET/
▲
and
START/▲ - are arranged on the front for controlling
a batch process and for setting parameters and
variables. Located in the center of the display
assembly is an 8-digit LCD to show characters 12.7
millimeters high.

B-320-2-E
17
6.2 Pushbutton Inspection and Cleaning
Pushbuttons used for operation can be inspected and cleaned by rst removing its semicircular panel, with the
owmeter in the pipeline or not. Be sure to depressurize the air source or remove the front cover to prevent the
shutoff valve from actuation before separating the pushbutton panel.
(1) Take off four hex socket head bolts and remove
the semicircular panel (Fig. 6.4).
Fig. 6.4
CAUTION When separating the
panel, be careful to
prevent pushbuttons and
their springs from coming
off and being lost (Fig. 6.5).
(2) Inspect and clean pushbuttons, their springs, and
button sockets on the part of the register front
cover.
(3) Following inspection and cleaning, install
pushbuttons into place according to their colors.
(See pushbutton colors on the previous page.)
Spring
Pushbutton
Panel
Hex Socket Head Bolt
(M4 × 10 w/spring washer)
Fig. 6.5
Cleansing Spray
Fig. 6.6
CAUTION
1. The panel is made of resin. Tighten bolts at
150cN•m.
2. Avoid immersion of the panel and pushbuttons
in solvent such as thinner, as these parts are
made of resin.
RUN
OUT
ALM
COUNT
END
XL
BATT
a
b
c
d
e
f
g
Batch setpoint counter (6-digit)
Flickers to show a low battery
Lights to show an alarm
Lights in response to pulses
arriving at total counter
Lights at the end of a batch
Cumulative total counter (8-digit)
With LW76E (2-step open and close):
1-step open (small valve: SV) Segment c lights in response to an operation signal output →Partially open
2-step open (main valve: MV) Segment b lights in response to an operation signal output →Fully open
Lights in response to a shutoff
valve operation signal output
Fig. 6.3
<LCD Display>

B-320-2-E
18
6.3 Pushbutton Functions
NOTE: For pushbutton switch locations, see Fig. 6.2 on page 16.
STOP
ROT.
button (red), internal button
STOP
ROT.
functions
Mode of Operation Functions
RUN mode
(batch processing)
A batch in progress. Stops the batch process. (Shutoff valve operation signal: stops; LCD OUT
goes out.)
Batch setpoint (not
operating) or cumulative
total count is displayed.
Batch setpoint displayed (6-digit) + RUN status displayed
⇔
Displayed alternately (after a reset)
Cumulative total count displayed (8-digit)
Batch setpoint is displayed
(not operating)
Switches to the batch setup mode (by holding the button depressed for
more than 3 sec. after resetting).
Missing ow-signal pulses
detected.
Resets the missing ow-signal pulse detection alarm. (LCD ALM goes
out.)
Batch setup mode Establishes a batch setpoint and switches to show the batch setpoint.
Setup mode Scrolls through the available parameters.
Establishes parameters.
CAUTION: A switch from batch setpoint display to cumulative total count display is not
acceptable unless the missing flow-signal detection alarm ALM , end-of-batch
END and overshoot detection alarm ALM are all reset, and the current batch
setpoint is reset.
RESET
▲
button (white), internal button
RESET
▲
functions
Mode of Operation Functions
RUN mode
(batch
processing)
Batch setpoint is displayed
(not operating).
Resets the batch setpoint (count),
Resets the end of a batch process. (LCD END : goes out.)
An overshoot is detected. Resets the missing ow-signal pulse detection alarm. (LCD ALM
goes out.)
Batch setup mode Moves the digit to be congured.
Setup mode Moves the digit to be congured.
CAUTION: On resetting a batch setpoint, the LCD display will show "0" in the add counter,
and Batch setpoint in the subtract counter.
START
▲
button (green), internal button
START
▲
functions
Mode of Operation Functions
RUN mode
(batch
processing)
Batch setpoint is
displayed
(not operating).
Starts a batch process. (Shutoff valve operation signal produced. LCD
OUT : lights up.)
A batch is in progress. Batch setpoint is displayed (for a duration from 5 sec. after start of a
batch process until its end while the button is held depressed).
Batch setup mode Adjusts a gure (incremental).
Setup mode Adjusts a gure (incremental).
CAUTION:
Starting up a batch process instantly produces a valve operation signal "SV Open" [LCD
OUT (bottom): illuminated] whereas, in a model without the 2-step open feature, it
produces a shutoff valve operation signal "MV Open" [LCD OUT (top): illuminated] at the
same time.

B-320-2-E
19
6.4 Switch Functions
6.4.1 Selecting Add and Subtract Counter
SW-1 in the register internal assembly selects the add or subtract counter.
SW-1 is located at the bottom of the register internal assembly. Set switch SW1-1 to either ADD or SUB.
SW1-2 is a switch for the setup mode. See paragraph 6.4.2.
Table 6.2
Switch Description
SW1−1
ON SUB (subtracting) counter (standard)
OFF ADD (adding) counter
Fig. 6.7 shows the SUB (subtracting) counter mode (standard).
6.4.2 Selecting Setup and RUN Mode
SW-2 in the register internal assembly selects the SETUP mode and RUN mode. Set SW1-2 to either RUN or SET.
Table 6.3
Switch Description
SW1−2
ON SETUP mode (SET) *1
OFF RUN mode (RUN) *2
NOTE: *1: Mode to change parameters and cumulative total count.
*2: Normally set in this mode.
Fig. 6.7 shows RUN mode.
Register Internal Assembly
SW1
ON
1 2
SUB
ADD RUN
SET
SW1−1 SW1−2
NOTE: These terminal are unused.
STOP
/ROT.
RESET
/
START
/▲
▲
INTERNAL PUSHIBUTTONS
Used for inspection, changing
parameters, etc. with the register front
cover removed.
（ ）
Fig. 6.7

B-320-2-E
20
7. RECONFIGURATION
In most cases, the pushbuttons arranged on the register front cover do the job (Sec. 7.1). When the register
front cover is removed for parameter changes or inspection, work with internal pushbuttons shown in Sec. 6.3
"Register Internal Assembly".
7.1 Establishing a Batch Setpoint
To establish a new batch setpoint, reset, while the LCD shows the batch setpoint, the current setpoint and hold
STOP
ROT.
button depressed for more than 3 seconds. The LCD (batch setpoint) will then begin to blink, indicating
that a new setpoint is acceptable.
Conditions unacceptable for changing batch setpoints
(1) SW1-2 is in the ON (SET).
(2) Cumulative total count is displayed.
(3) Missing pulses have been detected to activate an alarm.
(4) An overshoot has been detected to activate an alarm.
(5) A batch end output is present.
(6) A batch process is in progress.
CAUTION:
1. If an alarm output is present, reset it before changing setpoints.
2. While the register is simply adding up counts of incoming ow signal, other than in a
batch process, then changing batch setpoints presents no problem.
7.1.1 Procedure (batch setup mode)
On seeing the LCD (batch setpoint) blinking in response to the operation above, you can change the current
setpoint by the following procedure.
6 digits
BATCH SETUP MODE LCD (batch setpoint display) blinks.
To RUN Mode Batch setpoint is illuminated for 2 sec. approx.
NOTE
or
Adjust Figure Carry
Batch
Setpoint
Set
YES
NO
: To exit from setup mode without changing setpoint.
CHG
In the add counter, following the setup procedure above, the display shows the new
setpoint for 2 sec. approx. and goes back automatically to show "0" (RUN mode).
Set a figure with two
pushbuttons.
START
▲
RESET
▲
STOP
ROT.
STOP
ROT.
Upon depression of
STOP
ROT.
button, the gure is stored and the LCD display returns to the RUN mode.
In the batch setup mode, absence of any command with button depressions for more than 10 seconds approx.
causes the LCD to return to the previous setting, bringing back RUN mode automatically.