Echometer Model-H Operating Manual
  1. Manuals
  2. Brands
  3. Echometer Manuals
  4. Measuring Instruments
  5. Model-H
  6. Operating manual

Echometer Model-H Operating Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Echometer Model-H
The Acoustic Liquid Level Instrument for Hazardous Environments
Introduction
This operating manual contains information about the Echometer Model H Fluid Level Instrument including
installation instructions, operating procedures, requirements for intrinsically safe application, maintenance,
shooting problem wells, record interpretation and technical references relating to the optimization of producing
wells. Please read the manual and view the example screens before operating the instrument. Additional
technical papers can be accessed from the Echometer Web page, www.echometer.com; these articles offer
additional information on the use of acoustic fluid level instruments to optimize production. Please read these
papers at your convenience.

Limits of Liability

Echometer Company reserves the right to revise its software and publications with no obligation of Echometer
Company to notify any person or any organization of such revision. In no event shall Echometer Company be
liable for any loss of profit or any commercial damage, including but not limited to special, consequential, or other
damages.
Information in this document is subject to change without notice and does not represent a commitment on the
part of Echometer Company. The software described in this document is furnished under a license agreement
or nondisclosure agreement. It may be used or copied only in accordance with the terms of the agreement. It is
against the law to copy the software or any medium except specifically allowed in the license or non-disclosure
agreement.

Copyright Notice

Copyright 2009, 2010 Echometer Company. All rights reserved. Federal copyright law protects this manual. No
part of this manual may be copied or distributed, transmitted, transcribed, stored in a retrieval system or
translated into any human or computer language, in any form or by any means, electronic, mechanical,
magnetic, manual, photographic, photocopy, scanning, or otherwise, or disclosed to third parties without the
express written permission of Echometer Company.
Trademarks
AWP, TWM, QRod, Compact Gas Gun are trademarks of Echometer Company
Echometer Company
5001 Ditto Lane
Wichita Falls, Texas 76302, U.S.A.
Model – H Manual
Page 1
Phone: (940) 767-4334
Fax: (940) 723-7507
E-Mail:
info@echometer.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Model-H and is the answer not in the manual?

Questions and answers

Related Manuals for Echometer Model-H

Summary of Contents for Echometer Model-H

  • Page 1: Table Of Contents Echometer Model H Manual Introduction

    Echometer Company reserves the right to revise its software and publications with no obligation of Echometer Company to notify any person or any organization of such revision. In no event shall Echometer Company be liable for any loss of profit or any commercial damage, including but not limited to special, consequential, or other damages.

  • Page 2: Table Of Contents

    Table of Contents Echometer Model H Manual Introduction ..................................1 Limits of Liability ................................. 1 Copyright Notice ................................1 Safety Considerations ............................... 4 Operation in Hazardous Environments ......................... 4 Instructions X57H ..............................5 Echometer Schools ............................... 6 Instrument Description – Model H ........................... 7 Instrument Panel ................................
  • Page 3 ACOUSTIC LIQUID LEVEL DEPTH MEASUREMENT CONSIDERATIONS ..........83 HANDLING PRECAUTIONS ..........................83 N2 - PHYSICAL CONSTANTS ..........................83 SUB-MANUAL Model H Laptop Manager Software Quick Reference Guide Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 3 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

  • Page 4: Safety Considerations

    The user agrees that connecting the Echometer Model H to the battery charger will occur only in a NON •...

  • Page 5: Instructions X57H

    Instructions X57h Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 5 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A. E-Mail: info@echometer.com...

  • Page 6: Echometer Schools

    Echometer Schools Echometer Company offers schools on the use and applications of this equipment. You are invited to attend free of charge. A list of the schools, which are taught throughout the United States and Canada, will be sent upon request or can be viewed at http://www.echometer.com...

  • Page 7: Instrument Description - Model H

    The acoustic velocity, the casing pressure and average temperature can be input to the utility program AWP 2000 (download at no cost from www.echometer.com) to compute the gas gravity and the pressure distribution in the well, including the pump or tubing intake pressure and the pressure at the perforations.

  • Page 8: Instrument Panel

    A 5-button Star Group: • The up, down, right, left, and enter are used to navigate through the menus and also to enter or edit program parameters and well information. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...
  • Page 9 Connection to a battery charger should be made only when the instrument is outside the hazardous area. Attaching the 110 VAC or the 220 VAC Echometer battery charger having an input of 110/220 VAC and an output of 14.8 volts DC and 2Amps.
  • Page 10 Pressing the power button will restore power to the unit and initiates booting of the software. Caution should be used when utilizing the hard reset. It is recommended that the pin-hole reset button is only pressed when the instrument is completely powered down. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 11: General Operation Procedures

    Lift the Cocking Arm to close the internal gas valve. This prevents debris from entering the volume • chamber. • Open the Well Valve to the Echometer Gas Gun slowly and close the casing or wing valve to the flow line. Measure the Well Pressure using the precision pressure gauge. •...

  • Page 12: Rarefaction (Implosion) Mode

    Securely attach the Echometer Gas Gun to the Casing or Tubing Valve. • Close the Well Pressure Bleed Valve and Filler Bleed Chamber Valve. • Open the Well Valve to the Echometer Gas Gun slowly and close the casing valve or the wing valve to • the flow line. •...

  • Page 13: Acquisition Of Acoustic Records

    12 – Press the button under the Stop label to terminate acquisition after observing the liquid level response and a repeat if desired. 13- Save or Discard the acquired shot. 14- Return to Main Menu or Retest the same well. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 14: Title Screen

    1 - Power up instrument by pressing the ON/OFF button on the instrument panel. The following Self Test Screen is displayed for about 45 seconds: The following Title screen is displayed after powering up the instrument: Title Screen Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 15: Conditions Of Operation

    Conditions of Operation If the user Declines to accept the conditions the program shuts OFF the instrument. Page Down displays the continuation of the text detailing the conditions of operation. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 16: Main Menu

    When the user Accepts the Conditions, the Main Menu is displayed as shown in the following figure: Main Menu The Main Menu Help Screen gives general instructions for user input and control as well as information regarding the software version and instrument serial number: Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 17: Set-Up Menu

    Any acquired data will be named according to the date and time the shot was taken. Make sure the date and time are correct for your time zone so that your shot record will be accurate. Echometer Company Phone: (940) 767-4334 Model –...
  • Page 18 In the above figure the “Examples” group has been selected. If the desired Group is not in the list pressing the button under the “Add New Group” label will display the screen that allows adding new groups to the list as described later in this manual. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 19: Well And Group Selection

    7- Press the “Acquire Shot” button on the instrument panel after the well in question has been selected from the list (either pressing the button below the “Select Well” label or the “Enter” button of the 5 button Star Keys) Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 20: Prepare Well And Gas Gun For Explosion Shot

    8a-Pressing the button below “Explosion” label displays the check list for connection and preparation of the hardware to perform the acoustic test. Prepare Well and Gas Gun for Explosion Shot Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 21: Prepare Well And Gas Gun For Implosion Shot

    Prepare Well and Gas Gun for Implosion Shot 9 – When ready press the button under the “Continue” label Background Noise Display Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 22: Waiting For Shot To Be Fired

    In noisy wells it may be advantageous to Toggle ON/OFF a Low Pass filter to enhance the displayed data and help the user observe the echo from the liquid level and/or other anomalies present in the well. Echometer Company Phone: (940) 767-4334 Model –...

  • Page 23: Acquiring Data Screen

    Following the Stop command, or the expiration of the 30 second maximum recording interval, the program will process the acoustic data and display the following screen: Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 24: Automatic Fluid Level Analysis

    Data Set Disposition screen. Manual Adjustments The functions: Toggle Filters, Adjust Collars, Adjust Liquid Level and Analysis Options are discussed in detail in the next chapter of this manual. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 25: Data Set Disposition

    Pressing the button below the “Discard” label will delete the acquired data and display the Test Well Menu screen. Pressing the button below the “Help” label will display the following Acquired Data Set Disposition – HELP screen reviewing the above information. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 26: Repeat Acquisition

    Go to Main Menu Prepare instrument to Test Another Well Turn OFF the instrument Those are activated by pressing the corresponding buttons on the instrument panel. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 26 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

  • Page 27: Set-Up Menu

    Sleep Minutes before Power Off : Number of minutes after sleep time before instrument is powered OFF. Pressing the ON/OFF button will restart the Model H after power OFF. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 28: Operating Mode

    Operating Mode The Echometer Model H offers two options for acquisition of acoustic data; Named Well and Quick Shot. Named Well This option requires that an existing well file be selected before acquiring data. Upon acquisition the time- stamped acoustic record will be added to the records for that well.

  • Page 29: Units

    100mV. Setting the threshold too high or too low may inhibit the Model H from “hearing” the shot fired, or may increase the sensitivity to a level that would not allow it to discern a fired shot from low level noise in the well. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 30: Recalling, Analyzing And Uploading Acoustic Records

    Model H Laptop Manager Software. The following section illustrates how to recall and analyze acoustic records using the stand alone Echometer Model H. Recalling and Analyzing Acoustic Records Starting at the Main menu press the button below the “Recall Data”...
  • Page 31 Up & Down arrows. Press the button below the “Review Shot Data” label when the desired shot is selected. This will initiate the processing of the data as seen in the following screen: Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 32: Analysis Options

    This screen presents the user with a list of alternative liquid level depth calculation methods. The following section discusses the Automatic Collar and Liquid Level Analysis which is the method that is used most commonly. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 33: Automatic Collar And Liquid Level Analysis

    Adjust Liquid Level: this option opens a screen that allows the user to relocate the liquid level marker. Analysis Options: this presents the user with a list of alternative liquid level depth calculation methods. Each of these tools are discussed in the following sections. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 34 Pressing the button below the “Discard Changes” label will leave unchanged the previously stored analysis and interpretation of the acoustic data. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 35: Toggle Filters

    This option toggles ON and OFF a low pass filter to the acoustic data display. Adjust Collars: Adjust Collars option opens a screen that allows the user to modify the collar count. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 36 The previous display corresponds to the Band Pass filter. The previous display corresponds to the High Band filter. The previous display corresponds to the Unfiltered/Raw data Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...
  • Page 37 Then the spacing of the collars is adjusted (by pressing the UP and DOWN buttons) until the majority of the markers are aligned with collar echoes. This yields a joint count of 17.21 joints per second in the specific interval between 1 and 2 seconds. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 38 Once a change has been made to an Automatic Analysis, notice the screen title changes to reflect Manual Liquid Level Depth Analysis. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 39: Adjust Liquid Level

    Time using Marker screen. The user considers that the software located the marker slightly past the actual “first break” corresponding to the liquid level echo. The marker has been moved forward in the figure below. Echometer Company Phone: (940) 767-4334 Model –...

  • Page 40: Anomaly Marker Method

    Selecting the Anomaly Marker option opens the following form that in this case is blank since information about the distances to the known downhole markers had not been previously entered in the well file: Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 41: Edit Anomaly Menu

    The depth values entered here should take into account the Model H automatic depth correction applied for any Depth Reference Offset entered into the Well Information record. Selection and entry of data is performed using the Arrows and Enter keys: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 42 The horizontal arrows, Left/Right are used to move the marker. The vertical Up/Down arrows are used to change the vertical scale of the window. The Enter button is used to accept the marker position. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 43: Example Of Data Processing By The Anomaly Markers Method

    This particular acoustic record was acquired in a gas lift well while gas was flowing into the casing. This caused the high frequency noise that is observed throughout the record and that obscures the echoes from the liquid Echometer Company Phone: (940) 767-4334 Model –...
  • Page 44 After filtering, the vertical scale ( now set at 31.6 mV) should be readjusted using the Up/Down arrow keys to better observe the details of the record as shown in the following figure where the vertical scale is set at 3.2 mV: Echometer Company Phone: (940) 767-4334 Model –...
  • Page 45 Unfiltered/Raw shot trace, Toggling the filter to Low Pass may make it seem as though the Liquid Level has been incorrectly chosen. Do not readjust the Liquid Level marker when the Low Pass filter is turned on. Echometer Company Phone: (940) 767-4334 Model –...
  • Page 46 Analysis Options button and then the Anomaly Markers button which displays the following screen as discussed in the previous section: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 47 The marker is manually adjusted by the user until it is aligned with the first break of the echo at a time of 5.061 seconds as shown in the following figure: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 48 Note that the Acoustic Velocity (AV) is now recomputed based on the new Round Trip Travel Time (RTTT) of 5.061 seconds yielding a value of 1094 feet per seconds for the average AV between the wellhead and the first gas lift mandrel. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 49 The newly calculated Acoustic Velocity for each line populates the AV field of the marker following the manually adjusted marker until that next marker has also been positioned and the Enter key has been pressed, saving the marker’s position and moving to the next marker. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 50 The figure below shows the screen after having skipped the Other (O) and the Perforations (P) markers. Pressing the button Accept All Markers, finalizes the analysis and displays the following screen that allows adjusting, if necessary, of the marker corresponding to the liquid level echo: Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 51: Anomaly Method - Adjust Liquid Level

    The Liquid Level should be adjusted using the Unfiltered/Raw data NOT the Low Pass filtered data. Pressing the Accept button displays the final Liquid Level Depth Analysis for the Anomaly Marker option: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 52 Pressing the Continue button, the user is given the option of saving the acoustic record analysis or of discarding the changes. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 53: Acoustic Velocity Variation In Wellbore

    After acquiring or recalling an acoustic record and after displaying the record on the screen, pressing the Analysis Options button opens the following menu: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 54 Note that the first digit is highlighted and can be changed by the user with the Up/Down arrows. The Left/Right arrows move left and right between the character fields. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 55 The following screen shows that the user has entered a new acoustic velocity value of 1200 ft/sec. Pressing the Accept button shows the final liquid level analyis: Pressing the Continue button gives the options of either saving or discarding the analyis. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 56: Managing Well Data And Information

    Managing Well Data and Information Acoustic records and well information are stored in the memory of the Echometer Model H in a data base organized into Groups that contain Wells that contain Shots. The user navigates through the data base using the 5 button star keypad after having selected either Acquire or Recall acoustic Data in the Main screen.

  • Page 57: Group Name Manual Entry

    Once the full name has been entered, press the button under the label “Accept Name Entry”. The screen with the list of all the existing groups will be displayed as shown below: Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 58 The Right Arrow key is pressed to select the “Well” screen as shown in the next figure to display the Well list (that is empty at this point in the procedure). The next step is to start entering well names. Echometer Company Phone: (940) 767-4334 Model –...

  • Page 59: Well Name Manual Entry

    Other methods may be used to identify the path of the acoustic record. Once the full name has been entered pressing the button under the “Accept Name Entry” adds the Well to the list in the previously selected group. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 60 It is recommended that the values of these parameters for the well be entered in the data base, at this time, by pressing the button below the label “Well Information”. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 61: Well Information

    Marker Info button will open the screen for input of the corresponding depths as previously shown in the Anomaly Marker Analysis section. Press the button below the Accept label to return to the Acquire Acoustic Data screen. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 62: Wellhead Attachments

    Wellhead Attachments When operating the Echometer Model H instrument in a hazardous area the wellhead attachments must be certified intrinsically safe and approved for use in the classified area. Compact Gas Gun The Compact Gas Gun consists of a microphone and a ten cubic inch volume chamber with a ¼” outlet valve.

  • Page 63: Volume Chamber Pressure Gauge

    Microphone The microphone is a twin-disc pressure sensitive device that is vibration canceling. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 64: High Pressure Gas Guns

    Casing Pressure Gauges Precision Test Gauge Precision Digital Gauge Gas Cylinders 2-1/2 LB CO 5 LB CO Nitrogen Cylinder Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 64 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

  • Page 65: Principles Of Acoustic Measurements

    The Model H records the signal with the highest possible resolution and frequency content so that signal analysis and interpretation is optimized using digital signal processing techniques. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 66: Depth Calculation

    The acoustic instruments can be used to measure the distance to any change in cross-sectional area inside pipe or in the annulus. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 67: Recommendations For Optimum Performance

    Recommendations for Optimum Performance The Echometer wellhead should be as near as possible to the casing annulus (or the tubing) preferably within 5 feet. Short (5-10 ft) lengths of pipe can mask the desired downhole signals. Longer (20-60 ft) lengths will generate multiple reflections, which are hard to distinguish from collar reflections.

  • Page 68: Acoustic Record Interpretation

    Bottomhole pressure calculation in static and producing wells is described in technical papers and is facilitated by the use of software, which is supplied with the Echometer Model H. Details of the calculation methods used by the software are found in technical papers on the internet at www.echometer.com...

  • Page 69: Fluid Level Acquisition In Problem Wells

    In extreme cases it may be necessary to clean the tubing and casing to remove the foreign material. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 70: Battery Power Information

    To maintain Intrinsically Safe certification, the unit must be charged in a safe area and can only be charged using Echometer P/N MS1610. The Echometer Model H instrument will operate from the self-contained rechargeable battery. Battery MUST NOT be recharged while instrument is located in a hazardous area.

  • Page 71: Steps To Reset Model H Battery To Begin Taking A Charge

    After the charger turns red, allow the Model H to charge for several hours before you turn it back on or try to remove it from the power source. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 72: Steps To Reset Anc Charge A "Critically Low" Battery

    Until this point is reached, the charger light will display green. Echometer Company Phone: (940) 767-4334 Model – H Manual...
  • Page 73 When the paper clip is removed, the indicator light on the charger should turn from green to red and should remain red as the battery continues its normal charging sequence. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 74: Instument Testing/Troubleshooting

    Instrument Testing/Troubleshooting The Echometer Model - H has an internal test circuit, which is used to verify that the electronics and the acoustic amplifier are operating correctly. The test circuit is activated automatically when the power is turned ON. A system test and battery voltage is displayed on the screen.

  • Page 75: Compact Gas Gun Disassembly And Assembly Special Precautions

    Do not over tighten bolts. If the bolts are excessively tightened, the bolts would be pre-tensioned to a stress such that when internal pressure is applied, the additional force on the housing cap generated by the internal pressure could cause the bolts to fail. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 76: Appendix

    APPENDIX FIGURE COMPACT ASSEMBLY DRAWING Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 76 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A. E-Mail: info@echometer.com...

  • Page 77: Microphone/Cable Test

    Attach the rubber test bulb to the end of the gas gun securely. Attach the microphone cable to the microphone outlet BNC connector and to the instrument INPUT. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane...

  • Page 78: Rate Of Fill-Up Graph

    A well with 2 ” tubing and 4 ” casing, producing at 700 BPD will have an initial fill-up rate of 59 feet per minute. Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 78 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

  • Page 79: Use Of Rate Of Fill-Up Information

    A casing pressure build-up rate in excess of 1 PSI in three minutes indicates that the casing annulus liquid contains a substantial amount of free gas and the fill-up data should be used with caution. Echometer Company Phone: (940) 767-4334 Model – H Manual...

  • Page 80: Carbon Dioxide Cylinder

    CARBON DIOXIDE CYLINDER Echometer Part No. GG0430 & GG0470 CAUTION DO NOT OVER FILL, fill cylinder based on weight of CO2. Contents under pressure. Do not inhale gas or allow gas to touch skin. becomes cold during use and can cause frostbite or other personal injury.

  • Page 81: Co2 Cylinder Schematic With Part Numbers

    CO2 Cylinder Schematic With Part Numbers Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 81 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A. E-Mail: info@echometer.com...

  • Page 82: Carbon Dioxide Gas Information

    1.53 Specific Volume @ 70 F, 1-atm 8.76 cu ft/lb or 15,000 cu in/lb or 950 cu in/oz Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 82 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

  • Page 83: Nitrogen Gas Information

    F (-147.15 Critical Pressure 492.45-psia (33.5-atm) Specific Volume @ 70 F, 1-atm 13.8 cu ft/lb or 31,000 cu in/lb Echometer Company Phone: (940) 767-4334 Model – H Manual 5001 Ditto Lane Page 83 Fax: (940) 723-7507 Wichita Falls, Texas 76302, U.S.A.

Table of Contents

Save PDF