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Oval EL4101 Instructions Manual

Steam flow computer (saturated steam service)
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E-880-2N-E
Ins. No.
STEAM FLOW COMPUTER
(Saturated steam service)
Model: EL4101
This manual has been prepared to provide you with the information pertinent to the STEAM FLOW
COMPUTER (saturated steam service).
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.


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Summary of Contents for Oval EL4101

  • Page 1 Ins. No. STEAM FLOW COMPUTER (Saturated steam service) Model: EL4101 This manual has been prepared to provide you with the information pertinent to the STEAM FLOW COMPUTER (saturated steam service). 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-880-2N-E TABLE OF CONTENTS . BEFORE YOU BEGIN ...........................  . Confirming the Nameplate ...................... .2 Transportation Precautions ...................... . Storage Precautions ........................ 2. GENERAL ............................ 2. Features ............................ 2.2 Part Names ...........................  . INSTALLATION ...........................  . Outline Dimensions ........................
  • Page 3 E-880-2N-E COMPANION VOLUME KEY OPERATION MANUAL Ins. No. E-880TM-E CONTENTS . KEY ARRANGEMENT ......................0 2. DISPLAY SCREEN ........................  . INITIAL CHECK ........................ . MODE SELECTION ......................8 . RUN MODE SCREEN ......................2 . SET MODE .......................... .

  • Page 4: Before You Begin

    E-880-2N-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-880-2N-E 2. GENERAL Using the most advanced electronic tehcnologies, this digital instrument has been developed specifically to meet the most demanding steam flow measurement applications where accuracy is the prime requirement. In response to flowrate and temperature information arriving from the sensing terminal, such as a delta flowmeter, it calculates "dryness factor of "...

  • Page 6: Installation

    E-880-2N-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. (2) Air is dry and temperature at room temperature and stable.

  • Page 7: Wiring

    E-880-2N-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, .2 to 2 mm, 2-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-880-2N-E Table .2 Terminal Connections Label Description Label Description SUP. SUP. -wire generator ＋2VDC SIG. （＋） 2-wire generator Press. in ＋  to 20mADC/ Flow in  to VDC （−） Output sync with － input signal (O.C.) （＋） OUT / ＋...

  • Page 9: General Specifications

    E-880-2N-E 5. GENERAL SPECIFICATIONS Table 5.1 Item Description Pulse Speed of Signal name Power to generator generator response Contact closure pulse － .VDC Allowable 0Hz current 2-wire, 2VDC -wire .VDC － Flow input 0mA app. Input Voltage pulse Shortcircuit signals 2VDC 2-wire 2kHz protection...

  • Page 10: Internal Components And Functions

    E-880-2N-E 6. INTERNAL COMPONENTS AND FUNCTIONS 6.1 Front Panel 6.1.1 Display The display is a 28 × 28-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-880-2N-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-880-2N-E 7. CALCULATION FORMULAS 7.1 Conversion to Mass Units (Total mass flow) In saturated steam calculation, the temperature and pressure fed to the instrument are used in our proprietary formula of approximation to determine specific weight V", from which conversion is performed with respect to the flow input.

  • Page 13: Preparational Checks And Operation

    E-880-2N-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 14: Troubleshooting

    E-880-2N-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. 2.
  • Page 15 E-880-2N-E 10. ERROR MESSAGES Table 10.1 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 16 E-880-2N-E 12. OVERALL BLOCK DIAGRAM...
  • Page 17 E-880-2N-E STEAM FLOW COMPUTER ( Saturated steam service) PRODUCT CODE EXPLANATION 13. PRODUCT CODE EXPLANATION ①②③④⑤⑥-******-*************-* ******-******-***⑱⑲********-* Model：①～③ Output item 2：⑱⑲ 1 　Steam flow computer Pulse output 2 ******-******-*************-* Hyphen：⑦ 1 　Total mass flow/pulse width 1ms ******-⑧*****-*************-* Power supply：⑧ 5 　Total mass flow/pulse width 50ms D 　20～30VDC 9 　Total mass flow/pulse width special J 　85～264VAC　50/60Hz...
  • Page 18 E-880-2N-E 2017.09 Revised△ 2008.08 Released All specifications are subject to change without notice for improvement. E-880-2N-E (1)

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