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Oval EL4501 Instructions Manual

Multipoint temperature compensated flow computer
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Multipoint temperature compensated
FLOW COMPUTER
This manual has been prepared to provide you with the information pertinent to the Multipoint
Temperature Compensated FLOW COMPUTER.
With the proper application of the information and knowledge contained in this manual, you can expect
the best possible results over a long service life of this instrument. Keep this manual for ready reference.
It is suggested that the instruction manuals for the companion pulse generator (flowmeter) and receiving
instrument be referred to at the same time.
E-888-5-E
Ins. No.
MODEL：EL4501


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  • Page 1 Ins. No. Multipoint temperature compensated FLOW COMPUTER MODEL：EL4501 This manual has been prepared to provide you with the information pertinent to the Multipoint Temperature Compensated FLOW COMPUTER. With the proper application of the information and knowledge contained in this manual, you can expect the best possible results over a long service life of this instrument.

  • Page 2: Table Of Contents

    E-888-5-E TABLE OF CONTENTS . BEFORE YOU BEGIN ...........................  . Confirming the Nameplate ...................... . Transportation Precautions ...................... . Storage Precautions ........................ . GENERAL ............................5 . Features ............................5 . Part Names ........................... 5 . INSTALLATION ...........................  . Outline Dimensions ........................
  • Page 3 E-888-5-E COMPANION VOLUME KEY OPERATION MANUAL Ins. No. E-880TM-E CONTENTS . KEY ARRANGEMENT ......................0 . DISPLAY SCREEN ........................  . INITIAL CHECK ........................ . MODE SELECTION ......................8 5. RUN MODE SCREEN ...................... . SET MODE .......................... .

  • Page 4: Before You Begin

    E-888-5-E 1. BEFORE YOU BEGIN Every OVAL product is thoroughly tested and inspected before shipment from our factory. When received, its appearance should be inspected for possible damage by rough handling during transit. First of all, thoroughly read the handling precautions described in this section. For topics other than those covered in this section, refer to the respective sections of this manual.

  • Page 5: General

    E-888-5-E 2. GENERAL Using the most advanced electronic tehcnologies, this digital instrument has been developed specifically to meet the most demanding flow measurement applications in petroleum products receiving facilities where accuracy is the prime requirement. In response to the liquid flowrate and temperature information arriving from the sensing terminal, such as a flowmeter, it totalizes the flow while implementing meter error and temperature corrections.

  • Page 6: Installation

    E-888-5-E 3. INSTALLATION 3.1 Outline Dimensions All dimensions in millimeters Hold-down Fitting 232.4 Fig. . Outline Dimensions 3.2 Installation 3.2.1 Installation Location Select an installation site where: Min.120 () Mechanical vibration, shock and corrosive gases are negligible. () Air is dry and temperature at room temperature and stable.

  • Page 7: Wiring

    E-888-5-E 4. WIRING (See the "Wiring Guidelines" in the instruction manual of the companion pulse generator.) 4.1 Field Wiring Cables () Use electrostatically shielded, polyethylene insulated, vinyl sheathed control cables (CEVS, .5 to  mm, -conductor or -conductor), or equivalent, for input signal cables from the flowmeter. For output signal cables, use insulated vinyl sheathed cables (CVV, CVS ...
  • Page 8 E-888-5-E Table . Terminal Connections Label Description Label Description SUP. -wire generator -wire generator SIG. （＋） Flow in （−） Output sync with （＋） input signal (O.C.) ＋ OUT / Temperature Analog out  to 0mADC/ to 5VDC － Pt00Ω -wire Uncorrected total flow Pulse out  polarity...

  • Page 9: General Specifications

    E-888-5-E 5. GENERAL SPECIFICATIONS Table 5. Item Description Pulse Speed of Signal name Power to generator generator response 8V -wire current pulse OPTO 0, 0 8.5VDC kHz Contact closure pulse PG0 50Hz .5VDC PG0, Allowable -wire, VDC -wire current Voltage pulse Flow input NPG0A (F) 0mA app.

  • Page 10: Internal Components And Functions

    E-888-5-E 6. INTERNAL COMPONENTS AND FUNCTIONS 6.1 Front Panel 6.1.1 Display The display is a 8 × 8-dot multiple function display capable of showing the data, units of measure, error messages, and other information at the same time. (The display is backlighted.) 6.1.2 On-Screen Menu Items The units of measurement vary with configuration.

  • Page 11: Error Messages

    E-888-5-E 6.1.3 Error Messages When an erratic condition arises, an error message automatically appears on the display. (The information represented by error messages are listed on page .) If two or more concurrent errors are involved, individual messages will be scrolled at intervals of approximately  seconds.

  • Page 12: Calculation Formulas

    E-888-5-E 7. CALCULATION FORMULAS 7.1 Uncorrected Total Flow = a × I ：Uncorrected total flow ［L］ a ：Meter factor ［ L/P］ ：Namber of input pulses 7.2 Flow Velocity and Viscosity Related Meter Error Correction Formula (E Viscosity μ μ μ μ...

  • Page 13: Flow Calculation Formula

    E-888-5-E 7.4 Correction Factors in the Implementation of Temperature Correction of Petroleums Correction factor for implementing calculation of error correction for temperature on petroleum products is given by the formula 　V.C.F = exp [－α Δt (.0 + 0.8α 　　　　 Δt) α...

  • Page 14: Preparational Checks And Operation

    E-888-5-E 8. PREPARATIONAL CHECKS AND OPERATION 8.1 Preparation Before Operation () Ensure that the instrument and related equipment are correctly installed and wired with no place left unfinished. WARNING: Make sure to see that the power terminals are connected to a power source of the rated voltage.

  • Page 15: Troubleshooting

    E-888-5-E 9. TROUBLESHOOTING Reminder: If internal trouble is suspected, seek our service at the nearest sales office or customer service representative in your area. Table . Symptom Check Possible Causes Display is dead. . Inspect fuse. . Fuse is blown. .

  • Page 16: Error Messages

    E-888-5-E 10. ERROR MESSAGES Table 0. List of Error Messages Error Message Description ADJUST DATA ERROR Adjusted allowable range check error A/D CONVERT ERROR A/D converter circuit error DENSITY CONVERT ERROR Density converter circuit error TEMP . (PT) OVER Temperature Pt input  overflow TENP .

  • Page 17: Overall Block Diagram

    E-888-5-E 12. OVERALL BLOCK DIAGRAM...

  • Page 18: Product Code Explanation

    E-888-5-E 13. PRODUCT CODE EXPLANATION Output item 1 affix code Output item 2 Output item 1 Output item 2 affix code Output item 3 Others Output item 3 affix code Density input Pressure input Output item 4 Analog output hard Temp.
  • Page 19 E-888-5-E Output item 1 affix code Output item 2 Output item 1 Output item 2 affix code Output item 3 Others Density input Output item 3 affix code Pressure input Output item 4 Temp. input Analog output hard Input pulse signal Communication function Power supply Version code...
  • Page 20 + pulse corrected for viscosity and temperature Pulse Output Special １ Temperature Analog Output ９ Special ０ No (EL4501) Communication Capability １ Yes (EL4511) １ Munsell N1.5 Finish 2018.12 Revised △ 2008.08 Released All specifications are subject to change without notice for improvement.

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