Troxler NTO series Manual Of Operation And Instruction
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Troxler NTO series Manual Of Operation And Instruction

Asphalt content ignition oven
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Manual of Operation and Instruction
Troxler NTO
Asphalt Content
Ignition Oven
Troxler Electronic Laboratories, Inc.
3008 Cornwallis Road • P.O. Box 12057
Research Triangle Park, NC 27709
Phone: 1.877.TROXLER
Outside the U.S.A.: +1.919.549.8661
Fax: +1.919.549.0761
www.troxlerlabs.com

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  • Page 1 Manual of Operation and Instruction Troxler NTO Asphalt Content Ignition Oven Troxler Electronic Laboratories, Inc. 3008 Cornwallis Road • P.O. Box 12057 Research Triangle Park, NC 27709 Phone: 1.877.TROXLER Outside the U.S.A.: +1.919.549.8661 Fax: +1.919.549.0761 www.troxlerlabs.com...
  • Page 2 Troxler products are protected by U.S. and foreign patents. The Troxler NTO (New Technology Oven) Asphalt Content Ignition Oven is protected by U.S. Patents US 6.054,323 and US 6,436,718 and Canadian Patent CA 2,274,453. Copyright © 2000 – 2009 Troxler Electronic Laboratories, Inc.
  • Page 3 Rancho Cordova, CA 95742 Fax: 916.631.0541 Troxler European Subsidiary Troxler Electronics GmbH Gilchinger Strasse 33 D.82239 Alling nr. Munich, Germany Phone: ++49.8141.71063 Fax: ++49.8141.80731 E-mail: troxler@t-online.de NOTE To locate an independent, Troxler-authorized service partner near you, call 1.877.TROXLER (1.877.876.9537). Troxler NTO...
  • Page 4 Application of Council EMC Directive 89/336/EEC, 93/42/EEC, and Low Voltage Directive 73/23/EEC – as amended by 93/68/EEC. Standards to which Conformity is Declared: EN 61010–1+A2 EN 61326–1:1998 Manufacturer: Troxler Electronic Laboratories, Inc. P.O. Box 12057 3008 Cornwallis Road Research Triangle Park, North Carolina 27709 U.S.A. Apparatus:...
  • Page 5 Chapter 2. Do not attempt to operate the oven before reading this manual and the safety warnings posted on the unit. Troxler stresses that the user is solely responsible for ensuring the safe use of the oven. Neither the...
  • Page 6 CONVENTIONS USED IN THIS MANUAL Throughout this manual, symbols and special formatting are used to reveal the purpose of the text as follows: WARNING Indicates conditions or procedures that, if not followed correctly, may cause personal injury. CAUTION Indicates conditions or procedures that, if not followed correctly, may cause equipment damage.

  • Page 7: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1. INTRODUCTION TO THE TROXLER NTO Introduction................... 1–2 About This Manual ............... 1–4 Features of the Troxler NTO ............1–5 Parts and Accessories..............1–7 Unpacking and Inspecting ............1–9 CHAPTER 2. PRODUCT SAFETY INFORMATION Introduction................... 2–2 Cautions and Warnings..............
  • Page 8 TABLE OF CONTENTS (Continued) CHAPTER 7. HANDLING DATA Projects ..................7–2 Project Menu .................7–3 APPENDIX A. MAINTENANCE AND SERVICE Troubleshooting................A–2 Cleaning ..................A–4 Replacing Parts................A–8 Replacement Parts ..............A–14 Returning Parts for Service ............A–15 APPENDIX B. MENU MAP Menu Map Description..............B–2 APPENDIX C. SPECIFICATIONS Environmental Conditions............
  • Page 9 Inserting the Paper Roll.......... A–10 A–3 Insert Paper into Slot..........A–11 A–4 Printer Paper with Bottom Door Open ....A–11 A–5 Printer with Lower Door Open....... A–12 A–6 Installing the Printer Cartridge....... A–13 B–1 Troxler NTO Menu Map ...........B–3 Troxler NTO...
  • Page 10 LIST OF TABLES Table Title Page Oven Keys ..............4–3 Recommended Minimum Burn Times.......5–6...
  • Page 11 CHAPTER 1 INTRODUCTION TO THE TROXLER NTO This chapter provides a brief overview of the Troxler NTO (New Technology Oven) Asphalt Content Ignition Oven. This information includes a list of the parts and accessories, as well as instructions for unpacking and inspecting the oven upon receipt.

  • Page 12: Introduction

    Thus, accurate measurements of the percent asphalt content (%AC) and aggregate gradation are required for HMA quality control and assurance. The Troxler NTO Asphalt Content Ignition Oven allows safe, quick, and reliable measurement of the %AC of HMA samples and creates samples for aggregate gradation measurements.
  • Page 13 Do not attempt to operate the oven before reading this manual and the safety warnings posted on the unit. Troxler stresses that the user is solely responsible for ensuring the safe use of the oven. Neither the manufacturer, its subsidiary, distributors, nor...

  • Page 14: About This Manual

    HMA samples and to store sample data. This manual is organized as follows: Chapter 1, Introduction to the Troxler NTO – Provides a brief overview of the oven and its features, as well as a list of parts and accessories, and instructions for unpacking and inspection.

  • Page 15: Features Of The Troxler Nto

    FEATURES OF THE TROXLER NTO The oven incorporates a number of features that provide unparalleled efficiency, safety, usability, and flexibility. The oven heats the HMA sample using an infrared (IR) element. The use of IR radiation serves two purposes: it limits the heating of the aggregate material in the HMA sample while producing a very efficient and clean burn process.
  • Page 16 The oven features two audible indicators, an internally mounted beeper and a louder annunciator mounted on the rear panel. The beeper emits a short beep in response to a valid keystroke on the oven keypad. It sounds a longer beep when the operator presses an invalid key or the oven displays an error message.

  • Page 17: Parts And Accessories

    PARTS AND ACCESSORIES Figure 1–1 shows the Troxler NTO and its accessories. Use this figure to locate and identify the following parts: 1. The oven contains the electronics and IR heating element to burn the asphalt binder from the aggregate. The oven includes an internal printer used to print sample data and system status information.

  • Page 18: Parts And Accessories

    OVEN EXHAUST DUCT ACCESS PANEL DISPLAY CIRCUIT BREAKER/ POWER SWITCH INTERNAL KEYPAD PRINTER LOCK ARMS BASKET COVER SAMPLE BASKETS CATCH BASKET CARRIER Figure 1–1. Parts and Accessories 1–8...

  • Page 19: Unpacking And Inspecting

    UNPACKING AND INSPECTING NOTE To ensure the safe return of the oven to Troxler for repair or maintenance, please keep the original shipping box, pallet, and all packing materials. The box folds for easy storage. Upon receiving the oven from the factory: 1.
  • Page 20 ♦ Duct adapter, 3- to 4-inch ♦ Clamp, 4-inch hose ♦ Brush, soft-bristle ♦ Troxler NTO Manual of Operation and Instruction ♦ Material Safety Data Sheet (MSDS) Information Kit 6. Inspect the outside surfaces of the oven and accessories for damage.
  • Page 21 CHAPTER 2 PRODUCT SAFETY INFORMATION This chapter provides basic product safety information concerning the Troxler NTO Asphalt Content Ignition Oven, as well as cautions and warnings related to the safe use of the oven. CONTENTS Introduction................... 2–2 Cautions and Warnings..............2–4 Safety Warnings................

  • Page 22: Introduction

    INTRODUCTION The Troxler NTO Asphalt Content Ignition Oven is designed to be safe for the user. The system uses modern, refractory ceramic fiber (RCF) materials to provide highly efficient insulation of the heated chambers. This material is completely enclosed, and should present no health risk to the operator during normal use in accordance with this manual.
  • Page 23 For disposal information, please refer to the MSDSs enclosed with the product. If you have any questions regarding these MSDSs, please contact the nearest Troxler Service Center, as listed on page iii. Troxler NTO 2–3...

  • Page 24: Cautions And Warnings

    CAUTIONS AND WARNINGS Lower Rear of Oven (Identification of Interconnects) ♦ Cable for 120 V ac, 50/60 Hz (Model 4730) or 208–240 V ac, 50/60 Hz (Model 4731) power to the oven. ♦ The oven power source must have a reliable earth ground connection, or a hazardous condition may occur during oven operation.
  • Page 25 ♦ If the lithium battery should leak, do not allow the contents to come into contact with skin or eyes. If it does, immediately wash the affected area with cold water and seek medical advice. Troxler NTO 2–5...

  • Page 26: Safety Warnings

    SAFETY WARNINGS The Troxler NTO Asphalt Content Ignition Oven is a safe, durable unit. Troxler cannot anticipate every example of improper or unauthorized use of this oven that may lead to malfunction or accident. If a particular use is not specifically mentioned in this manual as authorized, then assume that the use is unauthorized and improper.
  • Page 27 ♦ Do not attempt to dry any aggregates mixed with volatile chemicals. ♦ Obtain and use appropriate safety equipment: heat-resistant gloves that can withstand 650 °C, and a face shield to protect the face. Troxler NTO 2–7...

  • Page 28: Basket Carrier

    ♦ Troxler recommends wearing a face shield when handling hot substances and operating the oven. ♦ Always wear heat-resistant gloves when handling hot substances. ♦ Use the basket carrier to move hot sample baskets (see Figure 2–1). Always keep the basket carrier to the left side of your body, with the handle between your body and the open oven door.
  • Page 29 ♦ Allow the oven to cool completely before performing service or maintenance. ♦ Soot may build up in the exhaust connector and pipe. Troxler recommends that the exhaust plenum box be cleaned after every 30 burn cycles, as described on page A–5.
  • Page 30 NOTES 2–10...
  • Page 31 CHAPTER 3 INSTALLATION This chapter provides instructions on site selection and installation of the Troxler NTO Asphalt Content Ignition Oven. CONTENTS Site Selection ................3–2 Oven Installation................3–3 Exhaust System Installation............3–5 Troxler NTO 3–1...

  • Page 32: Site Selection

    SITE SELECTION After unpacking and inspecting the Troxler NTO Asphalt Content Ignition Oven as described in Chapter 1, select a suitable site for installation. Apply the following criteria when selecting a site for the oven: ♦ The oven must be installed in a well-ventilated room with access to a fume hood or other suitable ventilation system.

  • Page 33: Oven Installation

    The oven requires no operator assembly. To install the oven, follow the steps below: CAUTION Troxler has optimized the airflow in the oven to ensure efficient combustion. Do not attach the exhaust duct directly to a central exhaust unit. An increase in suction due to external exhaust fans can affect the oven performance.
  • Page 34 Refer to the Electrical Specifications section on page C–4 for the current and voltage ratings for the oven. NOTE The Troxler NTO Asphalt Content Ignition Oven is a precision instrument. Troxler recommends using an uninterruptible power supply or surge protection on the oven’s input power source.

  • Page 35: Exhaust System Installation

    NOTE The Troxler NTO Asphalt Content Ignition Oven must be placed at least 15 cm (6 in.) from other vertical surfaces or structures. Troxler NTO...

  • Page 36: Overall Schematic For Exterior Wall And Roof Penetrations

    SEE FIGURE 3-4 EXTERIOR WALL ROOF SEE FIGURE 3-2 OR 3-3 FLEXIBLE DUCT (SUPPLIED BY TROXLER) TROXLER NTO 6" MIN (MODEL 4730/4731) WORKBENCH OR TABLE FLOOR Figure 3–1. Overall Schematic for Exterior Wall and Roof Penetrations 3–6...
  • Page 37 16" DIA MIN OPENING FOR COMBUSTIBLE WALL MATERIAL 8" DIA MIN OPENING FOR NON-COMBUSTIBLE WALL MATERIAL 18" MAX SEE NOTE3 4" FLEXIBLE METAL DUCT W/ CLAMP 15' LONG MAX (SUPPLIED BY TROXLER) GALVANIZED METAL THIMBLE EXTERIOR WALL NOTES: 1. Seal all joints between wall and thimble and between thimble and duct with a high-temperature caulk.

  • Page 38: Exterior Wall Penetration Using A Metal Wall Cap With Screen

    (NO COMPONENT SHALL HAVE A DAMPER) 16" DIA MIN OPENING FOR COMBUSTIBLE WALL MATERIAL 8" DIA MIN OPENING FOR NON-COMBUSTIBLE WALL MATERIAL 4" DIA FLEXIBLE METAL DUCT W/ CLAMP AIRFLOW 15' MAX LENGTH(SUPPLIED BY TROXLER) GALVANIZED METAL THIMBLE EXTERIOR WALL NOTES: 1.

  • Page 39: Roof Penetration

    6" (SEE NOTE 2) 9" (SEE NOTE 1) GALVANIZED METAL THIMBLE 4" DIA FLEXIBLE METAL DUCT W/ CLAMP 15' MAX LENGTH(PROVIDED BY TROXLER) NOTES: 1. Galvanized metal thimble must extend at least 23 cm (9 in.) above and below roof.

  • Page 40: Exhausting To A Fume Hood

    POINT OF EXHAUST EXTERIOR WALL ROOF FUME HOOD FLEXIBLE DUCT (SUPPLIED BY TROXLER) TROXLER NTO 6" MIN (MODEL 4730/4731) WORKBENCH OR TABLE FLOOR NOTES: 1. Consult fume hood manufacturer regarding proper installation of the hood. 2. Fasten 4-inch flexible duct to wall or fume hood so that the oven exhausts under the hood.
  • Page 41 CHAPTER 4 SETUP AND OPERATION This chapter provides information on using the Troxler NTO Asphalt Content Ignition Oven. It describes the oven keypad, and provides procedures for starting up the oven and setting it up for the first time, daily startup and operation, and shutting the oven down.

  • Page 42: Keypad

    KEYPAD Figure 4–1 shows the layout of the oven keypad. Table 4-1 lists the function of each key. BACK MENU SPACE ENTER PAPER TARE STORE FEED START ABORT Asphalt Ignition Oven Figure 4–1. Oven Keypad 4–2...

  • Page 43: Oven Keys

    Begins the burn cycle. Available when the default 〈START〉 screen is displayed. Stops the burn cycle. The oven stops collecting burn 〈ABORT〉 data and provides burn summary information. Available only during a burn cycle. Troxler NTO 4–3...

  • Page 44: Printer

    PRINTER Figure 4–2 shows the front panel of the oven printer. As shown in the figure, the status LED and paper feed button are located in the upper right corner of the printer. The status LED is green when the printer is powered on. In the event of a print error, the LED is amber.

  • Page 45: First-Time Startup And Setup

    Chapter 2 before operating the Troxler NTO Asphalt Content Ignition Oven. This section summarizes the initial startup and setup of the oven. For more detailed instructions, see Chapters 5 through 7, as referenced in this summary.
  • Page 46 4. From the MAIN MENU, press 〈5〉 to access the Scale Menu. Press 〈3〉 to verify the scale. Follow the prompts to verify the scale. For more information, refer to page 6–15. NOTE Scale verification should be done at room temperature. 5.
  • Page 47 5. Determine the aggregate correction factors (ACFs), if necessary. From the MAIN MENU, press 〈4〉 to access the Correction Menu. Use this menu to create and store up to twenty ACFs and to select the active ACF. For more information, refer to Chapter 6. Troxler NTO 4–7...

  • Page 48: Daily Startup And Operation

    Chapter 2 before operating the Troxler NTO Asphalt Content Ignition Oven. Troxler recommends the following method for burning samples. For additional information, refer to the following ASTM or American Association of State Highway and Transportation Officials (AASHTO) standards: ♦...
  • Page 49 ASTM method C 702 until the mass of material required for the test is obtained. 7. With the catch pan under the sample baskets, spread the sample evenly in the two baskets. Do not place more than 2500 g in either basket. Troxler NTO 4–9...

  • Page 50: Sample Basket Assembly

    8. Place the basket cover over the top sample basket as shown in Figure 4–3. Secure the sample baskets and cover to the catch pan with the lock arms. Ensure that the lock arms fully engage the slots in the top sample basket. 9.
  • Page 51 WARNING Always wear heat-resistant gloves when handling any hot substance. Troxler recommends wearing a face shield when the oven door is open and when handling the sample. Use the basket carrier to move hot sample baskets (see Figure 2–1 on page 2–8). Always keep the basket carrier to the left side of your body, with the handle between your body and the open oven door.
  • Page 52 WARNING Step away from the oven during ignition. Do not override the door lock. As the binder burns, the oven display may indicate higher oven temperatures than expected. This can be caused by the flame contacting the oven thermocouple. 13. The oven locks the chamber door at the start of the burn cycle. During the burn, the oven displays the chamber temperature, the current sample mass and initial sample mass, the %Loss, and the elapsed burn time:...
  • Page 53 17. Determine the aggregate gradation per ASTM standards C 117 and C 136 (AASHTO standards T11 and T27). Troxler NTO 4–13...

  • Page 54: Daily Shutdown

    DAILY SHUTDOWN To power down the oven: If the Auto-Timer function is disabled, position the circuit breaker/power switch (see Figure 1–1), to the OFF (down) position. The front panel display will be dark. If the Auto-Timer function is enabled, leave the circuit breaker/power switch (see Figure 1–1) in the ON (up) position.

  • Page 55: Project Menu

    CHAPTER 5 MAIN MENU The operator controls and configures the Troxler NTO Asphalt Content Ignition Oven from the MAIN MENU, its submenus, and displays. This chapter describes the many menu options. CONTENTS Oven Main Menu ................5–3 Burn Setup Menu ................5–4 Burn Parameters ..............
  • Page 56 CONTENTS (Continued) Status Menu.................5–21 View Status ................5–21 Print Status................5–22 Download Status ..............5–22 Auto-Status Print..............5–23 Store Function ................5–24 Active Project Selected ............5–25 No Project Data..............5–25 No Project Selected...............5–26 Miscellaneous Menu..............5–27 Time/Date Menu ..............5–28 Set Time .................5–28 Set Date ................5–29 Time Format ..............5–29 Date Format..............5–30 Baud Rate................5–30 Temperature Scale ..............5–31...

  • Page 57: Oven Main Menu

    Chapter 2 before operating the Troxler NTO Asphalt Content Ignition Oven. The oven control software includes a number of options that can be configured by the operator for greater flexibility of operation. To access these options, press 〈MENU〉.

  • Page 58: Burn Setup Menu

    BURN SETUP MENU The Burn Setup Menu is used to configure the parameters of the burn mode and to turn the Auto-Print and Auto-Store functions on or off. To display the Burn Setup Menu, press 〈1〉 at the MAIN MENU. The oven displays: Burn Setup Menu 1.

  • Page 59: Burn Mode

    Burn Time section on the following page. To select the Auto-Control mode, press 〈2〉 at the Choose Burn Mode menu shown above. The oven controls the burn time based on the cutoff limit. For instructions on setting the cutoff limit, see page 5–7. Troxler NTO 5–5...

  • Page 60: Burn Time

    Burn Time Different asphalt mixes may require different burn times, depending upon the sample %AC and the sample mass. The optimum burn time can be determined by preparing a test sample of known %AC. The test sample should closely represent the production mixture. Burn the test sample until it is clean (free of coke, the solid binder residue).

  • Page 61: Cutoff Limit

    Use the numeric and decimal keys to enter a cutoff limit from 0.1 to 1.0 gram in increments of 0.1 gram. After entering the cutoff limit, press 〈ENTER〉. The oven displays a brief confirmation message and returns to the Burn Parameter Menu. Troxler NTO 5–7...

  • Page 62: Calculation Type

    CUTOFF LIMIT AS A PERCENTAGE. To enter the cutoff limit as a percentage of the initial sample mass, press 〈2〉 at the Cutoff Units menu shown on page 5–7. The oven displays: Current Cutoff Limit X.XXX % do you want to change Cutoff Limit? To exit without changing the cutoff limit, press 〈NO〉.

  • Page 63: Profile Selection

    (greater than 1%). Option 2 is designed for samples that may not burn completely using the Default profile. This option may be required for some Superpave™ mixtures, as well as base (large stone) mixtures. Troxler NTO 5–9...

  • Page 64: Auto-Print

    To select the desired burn profile, press 〈5〉 at the Burn Parameter Menu shown on page 5–4. The oven displays: Profile (default) Use arrows to scroll Use Enter to select Use the arrow keys to scroll through the profiles. When the desired profile is displayed, press 〈ENTER〉.

  • Page 65: Sample Reduced Printout

    Tested By _________________________ Sample ID _________________________ Project 12.09.01.002 Burn Profile (default) Start Time = 09:50 Date = 12/09/2001 Serial Number 107 Customer Name A Testing Company Troxler Electronic Labs - Model 4730 Figure 5–1. Sample Reduced Printout Troxler NTO 5–11...

  • Page 66: Auto-Store

    IDs 3, 4, and so on. To prevent duplication of sample ID numbers, Troxler recommends either using sample IDs beginning at 100 or higher when storing sample data manually or always enabling the Auto-Store function.

  • Page 67: Active Project Selected

    〈YES〉. The oven displays the screens required to create a project as described in Chapter 7. When the project ID is complete, the oven sets the project as active, briefly displays the confirmation shown above, and then returns to the Burn Setup Menu. Troxler NTO 5–13...

  • Page 68: No Project Selected

    No Project Selected If the operator attempts to turn the Auto-Store function on and one or more projects have been created (see Chapter 7) but no project has been selected as active, the oven displays: Auto-Store requires an active project 1.

  • Page 69: Auto-Timer

    5–3. If the Auto-Timer is not already enabled, the oven requests the start date for the Auto-Timer as shown below. The start date is the date on which the Auto-Timer is to begin controlling power to the IR element. mm/dd/yyyy Input Start Date then press ENTER Troxler NTO 5–15...
  • Page 70 The top line of the display shows the current setting for the start date. The date format (in this example, mm = month, dd = day, and yyyy = year) is the same as that displayed on the default screen. To change the date format, refer to page 5–28.
  • Page 71 240 V ac (Model 4731) oven before the first sample is to be burned. To ensure consistent, repeatable results, Troxler recommends allowing the oven chamber to reach 400 °C (750 °F) for a 120 V ac (Model 4730) unit or 375 °C (707 °F) for a 240 V ac (Model 4731) unit...

  • Page 72: Disabling The Auto-Timer

    If the stop time is valid, the oven displays the Auto-Timer Enabled screen, showing the start date and time, the stop date and time, and the days to be skipped (if any). If no days are to be skipped, the bottom line of the display is blank. Auto Timer Enabled mm/dd/yyyy hh:mm AM...
  • Page 73 Auto-Timer Enabled screen, which shows the start date and time, stop date and time, and days to be skipped (if any). Auto-Timer Enabled mm/dd/yyyy hh:mm AM mm/dd/yyyy hh:mm PM Skip Weekends The oven then returns to the MAIN MENU shown on page 5–3. Troxler NTO 5–19...

  • Page 74: Project Menu

    PROJECT MENU The oven stores sample data in project files. The Project Menu enables the operator to create a new project; to select the active project from a list of created ones; and to view, erase, print, or download project data. The functions available from the Project Menu are described in Chapter 7, Handling Data.

  • Page 75: Status Menu

    ♦ Unit serial number and software version ♦ Active aggregate correction factor (ACF) identification and value ♦ Auto-Timer status (Enabled, Disabled, or Suspended) and settings (if enabled) ♦ Auto-Tare, Auto-Store, and Auto-Status Print status (ON or OFF) Troxler NTO 5–21...

  • Page 76: Print Status

    Use the up and down arrows to scroll through the various screens. To return to the Status Menu, press 〈ESC〉. NOTE The system status display can also be viewed directly from the default display by pressing the 〈STATUS〉 key. To return to the default display, press 〈ESC〉. PRINT STATUS To print system status information to the internal printer, press 〈2〉...

  • Page 77: Auto-Status Print

    Status Menu. To turn the Auto-Status Print function off, press 〈2〉. The oven updates the status of the function, displays a brief confirmation message, and returns to the Status Menu. Troxler NTO 5–23...

  • Page 78: Store Function

    IDs 3, 4, and so on. To prevent duplication of sample ID numbers, Troxler recommends either using sample IDs beginning at 100 or higher when storing sample data manually or always enabling the Auto-Store function.

  • Page 79: Active Project Selected

    Input new sample number then press ENTER Enter a sample number (up to six numerals). Troxler recommends that manually stored samples be numbered beginning at 100 or higher. When the sample number is complete, press 〈ENTER〉. If there is sufficient memory, the oven stores the sample data under the active project ID and sample number entered, briefly displays a confirmation message, then returns to the previous screen.

  • Page 80: No Project Selected

    To create a project, press 〈YES〉. The oven displays the screens required to create a project as described in Chapter 7. When the project ID is complete, the oven sets the project as active, displays a brief confirmation message, then requests the sample number as described in the Active Project Selected section on page 5–25.

  • Page 81: Miscellaneous Menu

    MENU shown on page 5–3. Use the up and down arrows to scroll through the menu options. Miscellaneous Menu 1. Time/Date 2. Baud Rate 3. Temperature Scale Miscellaneous Menu 4. Customer Name 5. System Output 6. Abort Print Miscellaneous Menu 7. Unlock Door 8. Clean oven 9. Adjust Airflow Troxler NTO 5–27...

  • Page 82: Time/Date Menu

    TIME/DATE MENU The Time/Date Menu allows the operator to set the current time and date and to select the desired format for the date and time displays. To access the Time/Date Menu, press 〈1〉 at the Miscellaneous Menu shown above. Use the up and down arrows to scroll through the menu options.

  • Page 83: Set Date

    To select the desired time format, press 〈3〉 at the Time/Date Menu. The oven displays: Time Format 1. AM/PM 2. 24-Hour Use the numeric keys to select the desired format, and press 〈ENTER〉. The oven sets the time format and returns to the Time/Date Menu. Troxler NTO 5–29...

  • Page 84: Date Format

    Date Format The oven can display the date in either mm/dd/yyyy or dd/mm/yyyy format, where mm = month, dd = day, and yyyy = year. To select the desired date format, press 〈4〉 at the Time/Date Menu. The oven displays: Date Format 1.

  • Page 85: Baud Rate

    Miscellaneous Menu. The oven displays: Temperature Scale 1. Celsius 2. Fahrenheit Use the numeric keys to select the desired temperature scale. The oven sets the scale, briefly displays a confirmation message, and returns to the Miscellaneous Menu. Troxler NTO 5–31...

  • Page 86: Customer Name

    CUSTOMER NAME The oven enables the operator to enter a 16-character customer name into the oven. To enter a customer name, press 〈4〉 on the Miscellaneous Menu. The oven displays: Customer Name is now XXXXXX do you want to change name? To accept the name displayed and return to the Miscellaneous Menu, press 〈NO〉...

  • Page 87: System Output

    Press 〈1〉 to turn the System Information function always on; 〈2〉 to enable the function only during a burn; or 〈3〉 to disable it. The oven displays a brief confirmation message and returns to the Miscellaneous Menu. Troxler NTO 5–33...

  • Page 88: Abort Print

    ABORT PRINT The Abort Print function enables the operator to halt a print operation. To access the Abort Print function, press 〈6〉 on the Miscellaneous Menu. The oven displays: Aborting print... Upon completion, the oven returns to the Miscellaneous Menu. UNLOCK DOOR The Unlock Door function allows the operator to unlock the chamber door if the sample burn time is less than 30 minutes or...

  • Page 89: Adjust Airflow

    The increase in fan speed is a fixed value, and can only be toggled on and off. Repeated attempts to increase the speed are ignored. Press 〈2〉 to return the fan speed to the factory calibration settings. Troxler NTO 5–35...
  • Page 90 NOTES 5–36...
  • Page 91 CHAPTER 6 CALIBRATION This chapter provides information on calibrating and verifying operating parameters for the Troxler NTO Asphalt Content Ignition Oven. The information includes procedures for determining an aggregate correction factor (ACF); for using the Correction Menu to manage ACFs; and for using the Scale Menu to tare, verify, and calibrate the integrated scale.

  • Page 92: Correcting %Ac Measurements

    Chapter 2 before operating the Troxler NTO Asphalt Content Ignition Oven. During the ignition process, a complex interaction of various effects (mass, temperature, airflow, materials type) can produce a result that could be interpreted as a “mass loss.”...

  • Page 93: Equipment Needed

    EQUIPMENT NEEDED The following equipment is required to determine an ACF to adjust the %AC measurements: ♦ Troxler NTO Asphalt Content Ignition Oven ♦ Safety equipment - including but not limited to heat-resistant gloves and face shield ♦ External scale precise to ± 0.1 g ♦...

  • Page 94: Sample Aggregate Correction Factor Form

    4. Prepare a correction sample that closely represents the production mixture per ASTM D 6307, or local and state requirements. 5. Divide the HMA sample into a minimum of three correction samples. 6. Preheat the sample to 105 ± 5 °C (221 ± 9 °F). Date ___________ Project ________________ %AC ________ Sample Number...
  • Page 95 WARNING Always wear heat-resistant gloves when handling any hot substance. Troxler recommends wearing a face shield when the oven door is open and when handling the sample. Use the basket carrier to move hot sample baskets (see Figure 2–1 on page 2–8). Always keep the basket carrier to the left side of your body, with the handle between your body and the open oven door.
  • Page 96 15. The oven requests the sample mass (W – W ). Enter the sample mass and press 〈ENTER〉. CAUTION Use care when loading and unloading samples to avoid touching or scraping the hearth plate, chamber sides, or IR element. 16. Place the sample with the baskets and catch pan on the hearth plate in the center of the oven.

  • Page 97: Calculating An Acf

    Discard the high and low ACF values, then average the two remaining values. 3. Enter the ACF as described in the Create ACF section on page 6–10. The oven will automatically adjust the asphalt content measurements using the active ACF. Troxler NTO 6–7...

  • Page 98: Correction Menu

    CORRECTION MENU The oven can store up to twenty aggregate correction factors (ACFs). Each ACF is stored using an alphanumeric ID entered by the operator. The ACF ID can be up to twelve characters. When a correction factor is active, all measurements are adjusted using that correction factor.
  • Page 99 ACF, displays a brief confirmation message, and returns to the Correction Menu. If the ACF ID entered is not valid, the oven displays an error message. Press 〈ENTER〉 to return to the Correction Menu. Troxler NTO 6–9...

  • Page 100: Create Acf

    CREATE ACF To create a new ACF, press 〈2〉 at the Correction Menu shown on page 6–8. If the maximum number (twenty) of ACFs already exists, the oven displays an error message. Press 〈ENTER〉 to return to the Correction Menu. To clear space in memory for the new ACF, use the Erase ACF function described on page 6–11.

  • Page 101: Erase Acf

    To choose an ACF from a list, press 〈1〉. The oven displays the ID of the first ACF. Use the arrow keys to scroll through the list. To select an ACF for erasure, press 〈ENTER〉 when the oven displays the ACF ID. Troxler NTO 6–11...
  • Page 102 To select a known ACF ID to be erased, press 〈2〉. The oven displays: to scroll chars YES to select char ENTER when done Enter the desired ACF ID and press 〈ENTER〉. After the ACF ID has been selected or entered, the oven displays: Erase ACF ACF ID Are you sure?

  • Page 103: Scale Menu

    Rock, and Construction Materials Testing. Please refer to these standards when identifying the accuracy and linearity requirements. Troxler recommends calibrating the scale should it fail the Verify test. To access the Scale Menu, press 〈5〉 at the MAIN MENU. The...

  • Page 104: Tare

    TARE To tare, or “zero” the integrated scale manually, press 〈1〉 at the Scale Menu. NOTE The operator can also tare the scale manually by pressing the 〈TARE〉 key when the default screen is displayed. The oven tares the scale, displays a brief confirmation message, and returns to the Scale Menu.

  • Page 105: Verify

    ENTER Enter the mass in grams, and press 〈ENTER〉. The oven displays: Place mass on scale, then press enter - system will delay 60 seconds Place the mass on the hearth plate, then press 〈ENTER〉. Troxler NTO 6–15...

  • Page 106: Calibrate

    The oven verifies the scale accuracy, computes the error percentage, then displays the results as shown: Verification Result XX.XXX % do you want to print result? To print the results, press 〈YES〉; to continue without printing, press 〈NO〉 or 〈ESC〉. If the error percentage is less than ±...
  • Page 107 The oven enables the operator to calibrate the scale using from two to ten calibration points (weights). Enter the desired number of calibration points, then press 〈ENTER〉. NOTE Troxler recommends using at least three calibration points (weights). Troxler NTO 6–17...
  • Page 108 NOTE When calibrating the scale, Troxler recommends using ANSI/ASTM Class 4 or NIST Class P masses that span the range over which the oven will be used. The lowest point of this range should be slightly less than the mass of the unloaded sample pan assembly (approximately 3500 g).
  • Page 109 Scale Menu. To ensure that the calibration conforms to the requirements of AASHTO M 231 and ASTM D 4753, verify the scale as described on page 6–15 using all of the masses used during the calibration. Troxler NTO 6–19...
  • Page 110 NOTES 6–20...
  • Page 111 CHAPTER 7 HANDLING DATA The Troxler NTO Asphalt Content Ignition Oven can store sample data for viewing and printing later. This data is stored in projects. This chapter explains how to use the Project Menu to create, select, view, erase, print, and download projects and data.

  • Page 112: Projects

    PROJECTS The Troxler NTO Asphalt Content Ignition Oven can store burn data for up to 200 samples. The oven stores sample data in project files under project IDs defined by the operator. Up to 20 project IDs can be defined.

  • Page 113: Project Menu

    ID. Use the arrow keys to scroll through the list of projects, then press 〈ENTER〉 when the desired project ID is displayed. The oven sets the selected project as active, briefly displays a confirmation message, and returns to the Project Menu. Troxler NTO 7–3...
  • Page 114 To activate a known project ID, press 〈2〉 at the Select display. The oven displays: to scroll chars YES to select char ENTER when done Enter a project ID using up to twelve alphanumeric characters. Use the numeric keys to enter numbers and move the cursor to the next position.

  • Page 115: Create

    〈ENTER〉 to accept the project ID. When the project ID is complete, press 〈ENTER〉. The oven sets the entered project ID as active, briefly displays a confirmation message, and returns to the Project Menu. Troxler NTO 7–5...

  • Page 116: View

    VIEW To view the sample data for a selected project, press 〈3〉 at the Project Menu shown on page 7–3. The oven displays: View 1. Scroll Projects 2. Enter Project ID Press 〈1〉 to scroll through the stored projects, or 〈2〉 to enter a known project ID.

  • Page 117: Erase

    To erase the displayed project, press 〈YES〉. The oven erases the project, displays a brief confirmation message, and returns to the Project Menu. To return to the Project Menu without erasing the project, press 〈NO〉 or 〈ESC〉. Troxler NTO 7–7...

  • Page 118: Print

    PRINT The Print function allows the operator to print the data for all samples stored in a selected project. NOTE To print only the data stored for a selected sample, see the note on page 7–6. To print project data, press 〈5〉 at the Project Menu. The oven displays: Output 1.

  • Page 119: Download

    Press 〈1〉 to scroll through the stored projects, or 〈2〉 to enter a known project ID. Follow the same procedures as described in the Select section on page 7–3 to select or enter the desired project ID. Troxler NTO 7–9...
  • Page 120 To output all projects, press 〈2〉. The oven prompts do you want to output in REDUCED format? To enable a reduced output, press 〈YES〉, to enable a standard output, press 〈NO〉. A standard output includes minute-by-minute burn data. A reduced output includes only a header and footer and a summary of the burn data .
  • Page 121 APPENDIX A MAINTENANCE AND SERVICE This appendix contains information on maintaining and servicing the Troxler NTO Asphalt Content Ignition Oven. CONTENTS Troubleshooting................A–2 Cleaning..................A–4 Cleaning the Oven Chamber ..........A–4 Cleaning the Exhaust Plenum Box........A–5 Replacing Parts ................A–8 Replacing Fuses ..............

  • Page 122: Troubleshooting

    Troxler NTO Asphalt Content Ignition Oven. If you are unable to determine the cause of a problem after reading the hints below, contact a Troxler Service Center (see page iii). OVEN DOES NOT TURN ON Ensure that the oven is plugged into an outlet and that the circuit breaker for the outlet is on.
  • Page 123 THE SCALE SHOWS ERRATIC READINGS Ensure that the baskets do not touch the side of the sample chamber. Contact a Troxler representative for further information. OVEN DISPLAYS: WARNING! Clean NTO Exhaust System. See Operation Manual for details. Press ENTER To ensure the continued safe and efficient operation of the oven, the exhaust system should be cleaned regularly.

  • Page 124: Cleaning

    CLEANING When the oven is at room temperature and the circuit breaker/power switch is turned off, the outside surface may be cleaned with a damp cloth. CLEANING THE OVEN CHAMBER The Clean Oven function cleans the oven chamber by burning off any residue that has collected.

  • Page 125: Cleaning The Exhaust Plenum Box

    WARNING! Clean NTO Exhaust System. See Operation Manual for details. Press ENTER When this warning is displayed, Troxler strongly recommends cleaning the exhaust plenum box as described on the following page. To ensure that the exhaust system has been cleaned, when the operator presses 〈START〉...
  • Page 126 WARNING To prevent personal injury or equipment damage, turn the oven circuit breaker/power switch off, unplug the oven, and allow the oven to cool before removing the access panel. To clean the exhaust plenum box: 1. Turn the oven circuit breaker/power switch off, unplug the oven, and allow the oven to cool.
  • Page 127 8. Replace the plenum access panel and hand-tighten the three captive thumbscrews. 9. Replace the outer access panel. Troxler NTO Appendix A–7...

  • Page 128: Replacing Parts

    (Troxler Service Representatives). REPLACING THE LITHIUM BATTERY The oven uses one DL2450 3-volt lithium battery (Troxler PN 15706) to maintain the stored data and real time clock. The oven monitors the battery voltage. If the battery voltage is low, the oven displays a “low battery”...

  • Page 129: Replacing The Printer Paper

    When the paper emerges through the front of the upper door housing, release the paper feed button and close the upper door (see Figure A–4). Close the lower door. The printer is now ready for use. Troxler NTO Appendix A–9...

  • Page 130: A–1 Printer With Doors Open

    SPRING CLIPS Figure A–1. Printer with Doors Open Figure A–2. Inserting the Paper Roll Appendix A–10...

  • Page 131: A–3 Insert Paper Into Slot

    INSERT PAPER INTO SLOT Figure A–3. Insert Paper into Slot Figure A–4. Printer Paper with Bottom Door Open Troxler NTO Appendix A–11...

  • Page 132: Replacing The Printer Cartridge

    REPLACING THE PRINTER CARTRIDGE For optimum performance and longevity, Troxler recommends that the printer cartridge be inspected each time the paper roll is replaced to ensure that the print ribbon is not damaged, frayed, or worn. In general, the printer cartridge should be replaced after no more than five complete paper rolls have been used, or sooner if the print quality is faded or of uneven density.

  • Page 133: A–6 Installing The Printer Cartridge

    7. Close the lower printer door and perform a test print to verify proper fit and print quality. SPOOL LATCH RIBBON TENSION WHEEL GUIDE PAPER BETWEEN RIBBON AND HOUSING Figure A–6. Installing the Printer Cartridge Troxler NTO Appendix A–13...

  • Page 134: Replacement Parts

    Adapter 3- to 4-inch duct 107777 Sample safety cage 108942 Hearth plate 109226 Basket carrier assembly 109227 Troxler NTO Manual of Operation and Instruction 109421 MSDS Information Kit 110094 Sample basket assembly, including sample baskets (2), catch pan, and cover Appendix A–14...

  • Page 135: Returning Parts For Service

    Items returned for service must be accompanied by an RGA (Returned Goods Authorization) number, and a description of the item and its problem. This information is used by Troxler shipping and service personnel to expedite the repair work. To obtain an RGA number, please call or fax Troxler headquarters at Research Triangle Park, or one of the branch offices with your request.
  • Page 136 NOTES Appendix A–16...
  • Page 137 APPENDIX B MENU MAP This appendix provides a map of the menus in the Troxler NTO Asphalt Content Ignition Oven control software. CONTENTS Menu Map Description ..............B–2 Troxler NTO Appendix B–1...

  • Page 138: Menu Map Description

    MENU MAP DESCRIPTION Figure B–1 is a map of the MAIN MENU of the oven control software and each of its submenus. To access the MAIN MENU, press 〈MENU〉. Where applicable, the default (as shipped) menu settings are shown in shaded text. The menu map uses indentation to indicate submenus that result from selection of a menu item.
  • Page 139 Figure B–1. Troxler NTO Menu Map NOTE Default (as shipped) settings are shown in shaded text. MAIN MENU 1. Burn Setup Burn Setup Menu 1. Burn Parameters Burn Parameter Menu 1. Burn Mode Choose Burn Mode 1. Program Time 2. Auto Control 2.
  • Page 140 Figure B–1. Troxler NTO Menu Map (Continued) MAIN MENU 3. Project Project Menu 1. Select Select 1. Scroll Projects 2. Enter Project ID 2. Create 3. View View 1. Scroll Projects 2. Enter Project ID 4. Erase Erase 1. One Project Select 1.
  • Page 141 Figure B–1. Troxler NTO Menu Map (Continued) MAIN MENU 4. Corr. Factors Correction Menu 1. Select ACF Select 1. Scroll ACFs 2. Enter ACF ID 2. Create ACF 3. Erase ACF Erase 1. One ACF Select 1. Scroll ACFs 2. Enter ACF ID 2.
  • Page 142 Figure B–1. Troxler NTO Menu Map (Continued) MAIN MENU 8. Miscellaneous Miscellaneous Menu 1. Time/Date Time/Date Menu 1. Set Time 2. Set Date 3. Time Format Time Format 1. AM/PM 2. 24-Hour 4. Date Format Date Format 1. mm/dd/yyyy 2. dd/mm/yyyy 2.
  • Page 143 APPENDIX C SPECIFICATIONS This appendix contains specifications for the Troxler NTO Asphalt Content Ignition Oven. CONTENTS Environmental Conditions ............C–2 Performance Specifications ............C–3 Electrical Specifications ...............C–4 Mechanical Specifications ............C–5 Troxler NTO Appendix C–1...

  • Page 144: Environmental Conditions

    ENVIRONMENTAL CONDITIONS Indoor –55 to 85 °C Ambient Storage (–67 to 185 °F) Temperature 10 to 50 °C Ambient Operating (50 to 122 °F) Temperature Altitude Rating 2000 m maximum ± 10% Main Supply Voltage Fluctuation Pollution Degree Installation Category (Overvoltage Category) Humidity 92% maximum...

  • Page 145: Performance Specifications

    Temperature sensors Type K thermocouples (see note below) NOTE The ignition method employed by the Troxler NTO Asphalt Content Ignition Oven does not require precise control of the chamber or other temperatures. If desired, oven performance can be verified using a precision asphalt mix.

  • Page 146: Electrical Specifications

    ELECTRICAL SPECIFICATIONS Model 4730 Model 4731 Power sources 120 V ac 208–240 V ac 50/60 Hz 50/60 Hz Single phase Single phase Peak power consumption 1265 VA 2496/3120 VA Current 11 A 12/13 A Plug NEMA NEMA 5-15P 6-20P Length of power cord 2 m (6.6 ft) 1.8 m (6 ft) Liquid crystal display...

  • Page 147: Mechanical Specifications

    20.3 W x 36.8 D x 4.1 H cm (each) (8 W x 14.5 D x 1.6 H in.) Basket assembly 23.8 W x 39.4 D x 11 H cm (9.4 W x 15.5 D x 4.3 H in.) Troxler NTO Appendix C–5...
  • Page 148 NOTES Appendix C–6...

  • Page 149: Index

    Suspend................... 5–18 Auxiliary port................1–6 BACK SPACE key ............... 4–3 Basket assembly..............1–5, 4–10 Basket carrier ..............1–5, 1–7, 2–8 Batteries, replacing ..............A–8 Baud rate..................5–30 Beeper ................... 1–6 Bitumen-to-aggregate calculation..........5–8 Bitumen-to-sample calculation ............. 5–8 Troxler NTO Index–1...
  • Page 150 Burn Mode................1–6, 4–7, 5–5 Parameter Menu ..............4–7, 5–4 Profile ................1–6, 4–7, 5–9 Setup Menu................4–7, 5–4 Time ..................4–7, 5–6 Burn Complete indicator .............1–6, 4–12 Calculating an ACF ...............6–7 Calculation type..............4–7, 5–8 Calibrate scale ................6–17 Calibration ..................6–1 Catch pan..................1–7 Centers, service ................iii Clean Oven .................5–34, A–4 Cleaning ..................A–4 Exhaust plenum box ............4–13, A–5...
  • Page 151 Installation ..................3–1 Exhaust system ................. 3–5 Oven..................3–3 Integrated scale ................1–5 Keypad.................. 1–5, 4–2 Lock, door..................1–5 Main Menu................4–5, 5–3 Manual conventions................. vi Mass, maximum sample ............4–9, C–3 Material Safety Data Sheet (MSDS)..........2–2 Troxler NTO Index–3...
  • Page 152 Maximum sample mass ............4–9, C–3 Mechanical specifications ............C–5 Menu Burn Parameters ..............4–7, 5–4 Burn Setup.................4–7, 5–4 Correction..............4–7, 5–20, 6–8 Main ..................4–5, 5–3 Map...................B–1 Miscellaneous..............4–6, 5–27 Project..............4–9, 5–20, 7–3 Scale ..............4–6, 5–20, 6–13 Status ..................5–21 Time/Date................4–6, 5–28 MENU key ..................4–3 Miscellaneous Menu............4–6, 5–27 Mode Auto-Control .............1–6, 4–7, 5–5...
  • Page 153 Fuses ..................A–8 Parts ..................A–8 Printer cartridge ..............A–12 Printer paper................A–9 Returning parts................A–15 RGA number................A–15 Safety information ................ 2–1 Sample Basket cover................1–7 Baskets..................1–7 Identification (ID) number............5–12 Safety cage............1–5, 1–7, 4–13, 6–6 Troxler NTO Index–5...
  • Page 154 Scale Auto-Tare ................6–14 Calibrate ..................6–17 Integrated...................1–5 Menu..............4–6, 5–20, 6–13 Tare..................6–14 Temperature................4–6 Verify ................4–6, 6–15 Select ACF ...................6–8 Project..................7–3 Self-test..................4–5 Serial port ................1–6, 5–30 Service Centers..................iii Site selection .................3–2 Specifications ................C–1 Electrical...................C–4 Environmental ................C–2 Mechanical ................C–5 Performance................C–3 Standard error of estimate ............6–19 START key ...................4–3 Startup and operation, daily............4–8 Startup and setup, first-time ............4–5...
  • Page 155 Time.................... 5–28 Burn ..................5–6 Format..................5–29 Time/Date Menu ..............4–6, 5–28 Troubleshooting................A–2 Unlock door ................5–34 Unpacking..................1–9 Verify scale................. 4–6, 6–15 View Project ..................7–6 Status..................5–21 YES key ..................4–3 Troxler NTO Index–7...
  • Page 156 NOTES Index–8...
  • Page 157 NOTES Troxler NTO Warranty–1...
  • Page 158 TROXLER’s obligation under this warranty shall be limited exclusively to the repair at a TROXLER facility at no charge, except for shipping to and from TROXLER’s plant, of any instrument which may prove defective under normal use and which TROXLER’s examination shall disclose to its satisfaction to be thus defective.

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