Oval Ultra LW76E Instructions Manual
  1. Manuals
  2. Brands
  3. Oval Manuals
  4. Measuring Instruments
  5. Ultra Oval LW76E
  6. Instructions manual

Oval Ultra LW76E Instructions Manual

Batch controller equipped, sizes 28, 29, 31, 60
Hide thumbs Also See for Ultra Oval LW76E:
Table of Contents

Advertisement

Quick Links

See also: Manual
B-320-2-E
Ins. No.
Batch controller equipped ULTRA OVAL
Meter Sizes: 28, 29, 31 and 60
Register Model: LW76E
(two-step open/two-step shutoff)
Sizes 28, 29, 31, and 60
Size 29
Double Case Construction
Single Case Construction
Sizes 60 and 31
Single Case Construction
Every OVAL flowmeter 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 field location for ready reference.
◆ About Meter Size Designation ◆
The size of OVAL positive-displacement flowmeters is basically identified by a two-digit
code.


Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Ultra Oval LW76E and is the answer not in the manual?

Questions and answers

Related Manuals for Oval Ultra Oval LW76E

Summary of Contents for Oval Ultra Oval LW76E

  • Page 1 Sizes 60 and 31 Single Case Construction Every OVAL flowmeter 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.

  • Page 2: Table Of Contents

    B-320-2-E CONTENTS 1. BEFORE YOU BEGIN ........................4 1.1 Confirming 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.
  • Page 3 B-320-2-E 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.

  • Page 4: Before You Begin

    (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.

  • Page 5: Operating Precautions

    In a case like this, we recommend to provide a dehumidifier, such as a dryer, to remove fluid to be drained and water content. NOTE: The above mentioned compressed air purification equipment are available from OVAL as an option. (4) About piping...

  • Page 6: Operating Conditions

    B-320-2-E 2. OPERATING CONDITIONS To maintain the stated high accuracy and long service life of the Ultra OVAL, make sure that flowrate, 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...

  • Page 7: Features And Functions

    "BATT" flickers 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.

  • Page 8: Part Name

    B-320-2-E 3.3 Part Name LCD Display (Total counter and Front Cover Fitting operation status) Unit of Total Plate Hex Soc. Hd. Bolt Cooling Tube Flow Direction Arrow (or Heating Tube) Flowmeter Rear Cover Meter Body Nameplate (Ratings shown) Label (Ratings shown) Register Front Cover Air Signal Connecting Flange...

  • Page 9: About Safety Features

    B-320-2-E 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.
  • Page 10 B-320-2-E (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 button is depressed in this case, the display scrolls through available data so that the STOP ROT.

  • Page 11: Flowmeter Installation

    (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 flux density, it must be isolated from the influence of external magnetic fields.

  • Page 12: Standard Installation, Horizontal Line

    B-320-2-E 4.2 Standard Installation, Horizontal Line 4.3 Standard Installation, Vertical Line (1) In case flow direction is from R to L, change places of (1) If the flow direction is from top to bottom, meter and strainer. change places of meter and strainer. (2) Arrange piping so as to facilitate drainage.

  • Page 13: Air Signal Line Connections

    (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 flowmeter should be installed in the physical orientation shown in Sections 4.2 and 4.3.

  • Page 14: Operation Time Chart And Pneumatic Circuit

    B-320-2-E 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. START Upon depression of . button, the shutoff valve opens to a predetermined position (initial flowrate). When a ▲...
  • Page 15 B-320-2-E ■ Pneumatic Circuit Coupled with a double torque cylinder ball valve SHUTOFF VALVE LW76E <Not in operation> OUT2 SIGNAL SHUTOFF VALVE AIR SOURCE AIR SOURCE OUT1 <Metering under initial flow control> OUT2 SHUTOFF VALVE SIGNAL AIR SOURCE AIR SOURCE OUT1 <Metering through fully open valve>...

  • Page 16: About Display And Pushbuttons

    B-320-2-E 6. ABOUT DISPLAY AND PUSHBUTTONS 6.1 Display Functions Three pushbuttons - STOP/ROT., RESET/ START/▲ - are arranged on the front for controlling LCD DISPLAY 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 REGISTER millimeters high.

  • Page 17: Pushbutton Inspection And Cleaning

    B-320-2-E <LCD Display> Batch setpoint counter (6-digit) Lights to show an alarm Lights in response to pulses Flickers to show a low battery arriving at total counter BATT COUNT Lights at the end of a batch Lights in response to a shutoff Cumulative total counter (8-digit) valve operation signal output With LW76E (2-step open and close):...

  • Page 18: Pushbutton Functions

    B-320-2-E 6.3 Pushbutton Functions NOTE: For pushbutton switch locations, see Fig. 6.2 on page 16. STOP button (red), internal button functions STOP ROT. ROT. Mode of Operation Functions Stops the batch process. (Shutoff valve operation signal: stops; LCD OUT A batch in progress. goes out.) Batch setpoint displayed (6-digit) + RUN status displayed Batch setpoint (not...

  • Page 19: Switch Functions

    B-320-2-E 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.

  • Page 20: Reconfiguration

    B-320-2-E 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 button depressed for more than 3 seconds.

  • Page 21: Example Of Establishing A Batch Setpoint

    B-320-2-E 7.1.2 Example of Establishing a Batch Setpoint ● Shown below is the procedure to set up a batch at 123456 (in the add counter). Following resetting the current batch setpoint, hold button depressed for more than 3 seconds. STOP ROT.

  • Page 22: Parameter Setup (Cumulative Total, Scaler Factor, Frequency Division, Initial And Final Settings, Missing Pulse Detection, Overshoot Setting)

    B-320-2-E 7.2 Parameter Setup (cumulative total, scaler factor, frequency division, initial and final settings, missing pulse detection, overshoot setting) (1) Open the register front cover (see Sec. 9.2 on page 30). SETUP LABEL RETAINER ADD RUN RESET BUTTON SW1−1 SW1−2 Fig.

  • Page 23: Operation In The Setup Mode

    B-320-2-E 7.2.1 Operation in the Setup Mode On seeing that the entire front panel LCD is blinking (by the previously outlined steps), you can change parameters and variables as follows. The procedure to enter a figure remains the same as "An Example of Batch Setup"...

  • Page 24: Operation

    B-320-2-E 8. OPERATION 8.1 Preparation Before Operation (1) Ensure that the flowmeter and associated equipment (shutoff valve, etc.) are correctly installed and connected to the piping assembly with no place left unfinished. WARNING: Make doubly sure that the shutoff valve and this flowmeter are correctly connected with air tubing.

  • Page 25: Operation With Actual Flow

    B-320-2-E 8.3 Operation with Actual Flow At first-time operation with actual process fluid, careful observation of operations sequence which is described below is required. It is essential that the flowmeter be used within the specified flow range. (⇩Refer to the piping diagram below.) VALVE FLOW DIRECTION SHUTOFF...

  • Page 26: Precautions At Operation Shutdown

    B-320-2-E (3) Liquids of low steam pressure Temperature and pressure of LPG, polyvinyl TAKE PRECAUTIONS c h l o r i d e m o n o m e r s o r a n y t h i n g w i t h l o w AGAINST viscosity and low steam pressure that are prone BEARING BURNING!

  • Page 27: Starting A Batch Process

    B-320-2-E 8.7 Starting a Batch Process 8.7.1 Preoperational Checks Before a Batch Process When you are through with all the preparations described in the previous sections, perform the following checks: (1) Parameters, batch setpoint, adding or subtracting counter mode are correctly established (see Sec. 7 or Sec.
  • Page 28 B-320-2-E Starting a continual batch process START - Shutoff valve opens. ▲ When interrupted while shutoff valve was fully open: Restart at full open. lights up. When interrupted while shutoff valve was fully open: Top and bottom light up. Reaching the leading edge of final setpoint before target batch setpoint (LW76E register equipped model only) - Shutoff valve closes (1st step).

  • Page 29: Inspection

    An amorphous sensor output waveform appears. 10μs Accepts a simulated pulse train from the pulse checker (OVAL Model PC2201, for example). Used for making a loop check or other servicing. Input mode is Model PC2201's PG30 mode. Also accepts pulses with levels "0": 1V max. and "1": 3 to 12V, or open collector.

  • Page 30: Register Disassembly

    B-320-2-E 9.2 Register Disassembly When you inspect or replace subassemblies, follow the procedure given below. NOTE: 1. Size 29 single-case construction meter is shown here. The same procedure applies to other sizes. 2. Removing only the internal assembly, battery pack, solenoid valve unit, or sensor unit does not require steps (1) and (2).
  • Page 31 B-320-2-E (7) Pull the internal assembly a little forward and (10) Draw the solenoid valve unit out of the register remove connectors CN1, CN2-1 (SV), and CN2-2 body. (MV) at the bottom of the battery pack. Now the solenoid valve is ready to be removed. CAUTION: With LW74E register, CN2-2 (MV) is unused.

  • Page 32: Meter Body Disassembly And Inspection

    Exercise care to keep each component disassembled free from grit and dust. - Meter Inspection When the fluid does not flow through the meter, the oval rotors might be stuck with scales, resulting in stop of their rotation. 9.3.1 Single-case Construction Meter Body Disassembly and Inspection NOTE: Size 29 single-case construction meter body is shown here.

  • Page 33: Single-Case Construction Meter Body Assembly Procedure

    9.3.2 Single-case Construction Meter Body Assembly Procedure ◆SERVICE NOTE BEFORE ASSEMBLY◆ Oval rotors, inner walls of the rotor shafts, inner wall of the measuring chamber, inlet and outlet ports, and inner surface of the front cover should be thoroughly washed clean, completely removing dust.

  • Page 34: Double-Case Construction Meter Body Disassembly And Inspection

    B-320-2-E 9.3.3 Double-case Construction Meter Body Disassembly and Inspection NOTE: Sizes 28 and 29 double-case construction meter body is shown here. The same procedure applies to other size maters. (1) Using hex key, take off four bolts (115). Holding (4) Remove the signal generating magnet assembly. the register assembly in both hands, carefully Take off 16 stud bolt nuts (119) and the front separate it from the meter body.

  • Page 35: Double-Case Construction Meter Body Assembly Procedure

    (202) to jack the inner Wash clean the oval rotors, measuring chamber, case top cover by tightening them alternately. and inner case top cover with suitable cleaning oil.

  • Page 36: About The Battery Pack

    BATTERY PACK Never give impact shock or disassemble. Or loss of performance may possibly result. Battery packs are available at your nearest OVAL 3. For storage, keep moisture and dust out. sales representative or at OVAL Service Center. 10.1 Battery Life This battery is good for about 4 years.

  • Page 37: Troubleshooting

    B-320-2-E 11. TROUBLESHOOTING NOTE: If troubleshooting below does not work at all, seek our service. SYMPTOM POSSIBLE CAUSE CHECKOUT AND COUNTERMEASURE Ref. page Remove register front cover to see if the battery pack is Battery pack is not in place. in place.
  • Page 38 Taking pressure loss of the entire piping system into responds to low. account, adjust to the proper pump or head pressure. button START Oval rotors stuck with solids and Referring to Sec. 9.3 "Flowmeter Body Disassembly", ▲ 32 to 35 but the process locked, blocking the fluid flow.
  • Page 39 B-320-2-E SYMPTOM POSSIBLE CAUSE CHECKOUT AND COUNTERMEASURE Ref. page Incomplete seals at pipeline Retighten bolts at pipeline connections or replace connections. gaskets. 10. Liquid leaks from the pipeline. Incomplete seal in the rear cover Inspect flowmeter rear cover fitting bolts for tightness or 32 to 35 of flowmeter body.

  • Page 40: Exploded Views And Parts List

    B-320-2-E 12. EXPLODED VIEWS AND PARTS LIST ● When you order replacement parts, specify the stock No., flowmeter model, instruction manual No., symbol No., part name and the quantity desired. 12.1 Size 29 Single Case Construction Meter Exploded View and Parts List 12.1.1 Size 29 Single Case Construction Meter Exploded View NOTE: See next page for parts list.

  • Page 41: Size 29 Single Case Construction Meter Parts List

    B-320-2-E 12.1.2 Size 29 Single Case Construction Meter Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks Meter Body Assembly 1 set Sensor Assembly 1 set (151 to 158, 160) Meter Body Sensor Fitting Disc Front Cover Sensor Retainer ▲03...

  • Page 42: Size 60 Single Construction Meter Exploded View And Parts List

    B-320-2-E 12.2 Size 60 Single Construction Meter Exploded View and Parts List 12.2.1 Size 60 Single Construction Meter Exploded View NOTE: See next page for parts list.

  • Page 43: Size 60 Single Case Construction Meter Parts List

    B-320-2-E 12.2.2 Size 60 Single Case Construction Meter Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks Meter Body Assembly 1 set Sensor Assembly 1 set (151 to 158, 160) Meter Body Sensor Fitting Disc Front Cover Sensor Retainer ▲...

  • Page 44: Size 31 Single Case Construction Meter Exploded View And Parts List

    B-320-2-E 12.3 Size 31 Single Case Construction Meter Exploded View and Parts List 12.3.1 Size 31 Single Case Construction Meter Exploded View NOTE: See next page for parts list.

  • Page 45: Size 31 Single Case Construction Meter Parts List

    B-320-2-E 12.3.2 Size 31 Single Case Construction Meter Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks Meter Body Assembly 1 set Sensor Assembly 1 set (151 to 158, 160) Meter Body Sensor Fitting Disc Front Cover Sensor Retainer ▲...

  • Page 46: Sizes 28, 29, And 31 Double Case Construction Meter, 10K Type Exploded View And Parts List

    B-320-2-E 12.4 Sizes 28, 29, and 31 Double Case Construction Meter, 10K type Exploded View and Parts List 12.4.1 Sizes 28, 29, and 31 Double Case Construction Meter, 10K type Exploded View NOTE: See next page for parts list.

  • Page 47: Sizes 28, 29, And 31 Double Case Construction Meter, 10K Type Parts List

    B-320-2-E 12.4.2 Sizes 28, 29, and 31 Double Case Construction Meter, 10K Type Parts List Size 28 Size 29 Size 31 Symbol No. Part Name Q'ty Remarks Q'ty Remarks Q'ty Remarks Outer Case Assembly 1 set 1 set 1 set Outer Case Front Cover ▲04...

  • Page 48: Size 60 Double Case Construction Meter, 10K Type Exploded View And Parts List

    B-320-2-E 12.5 Size 60 Double Case Construction Meter, 10K type Exploded View and Parts List 12.5.1 Size 60 Double Case Construction Meter, 10K type Exploded View NOTE: See next page for parts list.

  • Page 49: Size 60 Double Case Construction Meter, 10K Type Parts List

    B-320-2-E 12.5.2 Size 60 Double Case Construction Meter, 10K Type Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks Outer Case Assembly 1 set Sensor Assembly 1 set (151 to 158, 160) Outer Case Sensor Fitting Bracket Front Cover Sensor Retainer ▲...

  • Page 50: Sizes 28, 29, And 31 Double Case Construction Meter, 30K Type (F3) Exploded View And Parts List

    B-320-2-E 12.6 Sizes 28, 29, and 31 Double Case Construction Meter, 30K type (F3) Exploded View and Parts List 12.6.1 Sizes 28, 29, and 31 Double Case Construction Meter, 30K type (F3) Exploded View NOTE: See next page for parts list.

  • Page 51: Sizes 28, 29, And 31 Double Case Construction Meter, 30K Type (F3) Parts List

    B-320-2-E 12.6.2 Sizes 28, 29, and 31 Double Case Construction Meter, 30K Type (F3) Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks 1 set 1 set Outer Case Assembly Sensor Assembly (151 to 158, 160) Outer Case Sensor Fitting Bracket Front Cover...

  • Page 52: Size 60 Double Case Construction Meter, 30K Type (F3) Exploded View And Parts List

    B-320-2-E 12.7 Size 60 Double Case Construction Meter, 30K type (F3) Exploded View and Parts List 12.7.1 Size 60 Double Case Construction Meter, 30K type (F3) Exploded View NOTE: See next page for parts list.

  • Page 53: Size 60 Double Case Construction Meter, 30K Type (F3) Parts List

    B-320-2-E 12.7.2 Size 60 Double Case Construction Meter, 30K Type (F3) Parts List Symbol No. Part Name Q’ty Remarks Symbol No. Part Name Q’ty Remarks 1 set Outer Case Assembly 1 set Sensor Assembly (151 to 158, 160) Outer Case Sensor Fitting Bracket Front Cover Sensor Retainer...

  • Page 54: Register Exploded View And Parts List

    B-320-2-E 12.8 Register Exploded View and Parts List ● When you order replacement parts, specify the stock No., flowmeter model, instruction manual No., symbol No., part name and the quantity desired. ◇EXPLODED VIEW◇ ◇PARTS LIST◇ Symbol Part Name Q'ty Remarks 400 B LW74E Register Assembly 1 set (401 to 415)

  • Page 55: General Specifications

    B-320-2-E 13. GENERAL SPECIFICATIONS ● Register Assembly DESCRIPTION ITEM LW76E Air two-step open, two-step close Type of control (One-step open mode available by setting the initial value at 0.) 0.20 to 0.69MPa (depends on the shutoff valve rating.) Signal air pressure (Air must be clean and dry.) Air signal line connection Rc 1/8 with a bite-type fitting for φ6 ×...
  • Page 56 B-320-2-E NOTE: For outline dimensions and pipeline connection dimensions, see the approval drawing (or specifications of the product). 2013.03 Revised 2010.02 Revised△ All specifications are subject to change without notice for improvement. B-320-3-E (2)

Table of Contents