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VIASYS Vmax Encore Technical Reference Manual

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Technical Reference Manual
Vmax Encore
L2707 Rev. A
®
© 2005 VIASYS
Respiratory Care Inc.

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Summary of Contents for VIASYS Vmax Encore

  • Page 1 Technical Reference Manual Vmax Encore L2707 Rev. A ® © 2005 VIASYS Respiratory Care Inc.

  • Page 2: Copyright And Trademark Notices

    SensorMedics Corporation, except as specifically permitted under the copyright laws of the United States of America. VIASYS and the VIASYS logo are registered trademarks of VIASYS Healthcare Inc. Vmax, Autobox, MicroGard, and FreeFlow are trademarks of VIASYS Healthcare Inc. Perma Pure is a registered trademark of Perma Pure, Inc.

  • Page 3: Precautions

    ® Type B (Vmax and Vmax Spectra 62J/62W) • Mode of operation: Continuous The Vmax Encore and Vmax Spectra 62J/62W comply with the Medical Device Directive MDD 93/42/EEC and have been approved to carry the CE Mark shown below. L2707...
  • Page 4 Vmax Encore Technical Reference Manual L2707...

  • Page 5: Table Of Contents

    Chapter 1 Introduction Vmax Encore Series Overview - - - - - - - - - - - - - - - 1–1 Vmax Instrument Configurations - - - - - - - - - - - - - - 1–1 System Components- - - - - - - - - - - - - - - - - - - - 1–6...
  • Page 6 Vmax Encore Technical Reference Manual L2707...

  • Page 7: Introduction

    Vmax Encore 229 Pulmonary Function/Cardiopulmonary Exercise Testing Instrument The Vmax Encore module can be positioned horizontally or vertically. The module can have a high profile in the horizontal position (a wide profile in the vertical position); or the module can have a low profile in the horizontal position (a narrow profile in the vertical position), depending on the model.
  • Page 8 Vmax Encore 62J/62W Autobox Body Plethysmograph. VMAX ENCORE 20 PULMONARY SPIROMETRY INSTRUMENT The Vmax Encore 20 is designed to be used as a lightweight, portable office or bedside pulmonary screening spirometer with the capability of controlling the Vmax Encore 62J/62W Autobox.
  • Page 9 VMAX ENCORE 229 PULMONARY FUNCTION ANALYSIS/ CARDIOPULMONARY EXERCISE TESTING INSTRUMENT The Vmax Encore 229 combines all the features and options of both the Vmax Encore 22 and Vmax Encore 29 instruments with the capability of controlling the Vmax Encore 62J/62W Autobox.
  • Page 10 Multi-gas analyzer and DLCO mix calibration gas is not included. VMAX ENCORE 29c CARDIOPULMONARY EXERCISE TESTING INSTRUMENT The Vmax Encore 29c is designed to perform the same tests as the Vmax Encore 29 instrument mentioned above with the exception of Mixing Chamber exercise testing which is not provided.
  • Page 11 VMAX ENCORE 229d PULMONARY FUNCTION/CARDIOPULMONARY EXERCISE TESTING INSTRUMENT The Vmax Encore 229d is designed to perform the same tests as the Vmax Encore 229 instrument mentioned above with the exception of Gas Dilution Lung Volume testing which is not provided.

  • Page 12: System Components

    Temperature Transducer • Mass Flow Sensor Input • Box Pressure Input Vmax Encore 22 Pulmonary Function Analysis Instrument Measurement components in the Vmax Encore 22 Pulmonary Function Analysis Instrument: • Pressure Transducers (3) • Barometric Pressure Transducer • Direction Pressure Transducer •...
  • Page 13 Technical Reference Manual Chapter 1 Introduction Vmax Encore Vmax Encore 29 Cardiopulmonary Exercise Testing Instrument Measurement components in the Vmax Encore 29 Cardiopulmonary Exercise Testing Instru- ment: • Pressure Transducers (3) • Barometric Pressure Transducer • Direction Pressure Transducer •...
  • Page 14 3-way High-flow Input Valve for Oxygen and Diffusion Gases • Perma Pure Calibration Tubing Vmax Encore 29 Metabolic Measurement LC Cart Pneumatic components in the Vmax Encore 29 Metabolic Measurement LC Cart: • Solenoid Valves (5) • Mixing Chamber/Blower Combination Unit with Mass Flow Sensor Adapter •...
  • Page 15 Vmax Encore MASS FLOW SENSOR The Vmax Encore Series instruments measure inspired and expired flow directly by using the highly accurate and very stable Mass Flow Sensor. The computer program electronically integrates flow signals to obtain volume measurements and makes the Mass Flow Sensor linear.
  • Page 16 Technical Reference Manual Vmax Encore filaments also makes it possible to track the rapidly changing gas temperatures encountered in all Vmax Encore diagnostic functions. MULTI-GAS ANALYZER The rapid-response Multi-gas Analyzer provides a real-time measurement of Carbon Monoxide (CO) and Methane (CH ).
  • Page 17 Technical Reference Manual Chapter 1 Introduction Vmax Encore Emergency First Aid Procedures In case of contact with the skin or eyes, immediately flush with water for at least 15 minutes and remove all contaminated clothing. Get medical attention immediately. If ingested, give large amounts of water and DO NOT INDUCE VOMITING. Obtain med- ical attention immediately.
  • Page 18 Chapter 1 Introduction Technical Reference Manual Vmax Encore AUTOMATED BREATHING VALVE Figure 1-2 Automated Breathing Valve. The automated breathing valve is used for the following tests: FRC, DLCO, max pressures, compliance, SBO2, P100, and intra-breath DLCO. The pneumatically driven valve automatically switches the patient between the various breathing circuit configurations, and between room air and the test gases.
  • Page 19 Technical Reference Manual Chapter 1 Introduction Vmax Encore MIXING CHAMBER/BLOWER A 2.6-liter mixing chamber is located in the Pneumatics/Fan Assembly. This chamber is used for mixing expired gas during exercise and calorimetry testing. The chamber also houses the variable volume, high capacity blower used for dilution testing. The blower volume is controlled by the computer and is continuously variable from 12–60 LPM.
  • Page 20 Chapter 1 Introduction Technical Reference Manual Vmax Encore BAROMETRIC PRESSURE SENSOR A barometric pressure sensor is located in the Analyzer Assembly to continuously measure ambient barometric pressure, making operator-entry of a reading from a barometer unnecessary. This same sensor also measures changes in gas sample line pressure so that adjustments in gas partial pressures can be calculated.
  • Page 21 Technical Reference Manual Chapter 1 Introduction Vmax Encore CALIBRATION SYRINGE Figure 1-3 Calibration Syringe. The 3.0-liter calibration syringe is included with the system for performing volume calibration, verifications, and quality assurance procedures. 1–15 L2707...

  • Page 22: Vmax Encore Series Specifications

    Vmax Encore VMAX ENCORE SERIES SPECIFICATIONS All materials used in the construction of the Vmax Encore Series instruments, with the exception of the O2 Sensor, are non-toxic and pose no safety risk to the patient or operator. During the course of servicing the equipment, wear eye...
  • Page 23 Technical Reference Manual Chapter 1 Introduction Vmax Encore Table 1-1: Flow Volume/Gas Measurements 0.0005% CO 0.0005% CH Resolution 0.0005% C (For investigational use only.) ±0.003% CO ±0.003% CH Accuracy ±0.003% C (For investigational use only.) 1. The Multi-Gas Analyzer is included only with diffusing-capacity testing applications.
  • Page 24 Chapter 1 Introduction Technical Reference Manual Vmax Encore Table 1-4: Internal Quality Assurance Gas Infusion Calibrator 10 – >100 LPM VE range for constant VO /VCO stability Temporal Alignment Verification System Integrity 1. Included with the cardiopulmonary exercise testing application.
  • Page 25 Technical Reference Manual Chapter 1 Introduction Vmax Encore Table 1-7: Standards Quality System Registration ISO 13485/CMDR FDA 510(k) market clearance MDD 93/42/EEC CE marked Electrical Safety EN 60601-1 EMC EN 60601-1-2 1. Approvals apply to some or all instruments. 1–19...
  • Page 26 Vmax Encore Technical Reference Manual 1–20 L2707...

  • Page 27: System Description

    (Systems with fewer capabilities may have fewer components.) Since the Vmax Encore 229 has the hardware features of all Vmax Encore Series instruments, it will be used to describe the individual components that make up those systems.
  • Page 28 Vmax Encore MAIN CIRCUIT BOARDS As stated earlier, there are four main circuit boards in the Vmax Encore 229. Systems with fewer hardware options may have fewer main circuit boards. Example: The Vmax Encore 20 has only two main circuit boards.
  • Page 29 Chapter 2 System Description Vmax Encore Note: The gas analyzers in the Vmax Encore Series instruments have small pre-amp circuit boards mounted to them and are not included in this discussion. They will be dis- cussed later with their respective analyzers.
  • Page 30 Chapter 2 System Description Technical Reference Manual Vmax Encore MAIN HARDWARE DEVICES The eight main hardware devices of the Vmax Encore 229 and their locations are: Hardware Device Module Location Sample Pump Analyzer Assembly Analyzer Analyzer Assembly Sensor Analyzer Assembly...

  • Page 31: Block Diagrams

    The Vmax Encore 229 is a pulmonary function/cardiopulmonary exercise testing instrument. As stated earlier, this is the most feature-packed system of all Vmax Encore Series instruments. The Vmax Encore 229 contains a complete set of hardware devices (all available devices for the Vmax Encore Series instruments).
  • Page 32 Chapter 2 System Description Technical Reference Manual Vmax Encore Pump and Analyzers Assembly The Pump and Analyzers Assembly is mounted in the front of the Analyzer Assembly of all Vmax Encore Series instruments that require analyzers. It houses the Sample Pump, the O Sensor, the Analyzer, and the Multi-gas Analyzer.
  • Page 33 Circuit Breaker The Circuit Breaker is mounted in the right front corner (facing the front of the Vmax Instrument) of the Analyzer Assembly. It is the main power switch for the Vmax Encore Series instruments. Mass Flow Sensor Board The Mass Flow Sensor Board is the largest circuit board in the Analyzer Assembly. It is host to a multitude of functions such as housing the Mass Flow Sensor conditioning circuitry and the barometric pressure transducer.
  • Page 34 Analyzer Assembly. It provides supply voltages for all electronic, electrical, and electromechanical devices of the Vmax Encore Series instruments. Circuit boards use the +5, +15, and –15 volt power supplies for the TTL and op-amp circuits. The solenoid valves on the Solenoid Board use the +5 Volt supply.
  • Page 35 Figure 2-5 Vmax Encore 29 Block Diagram Pump and Analyzers Assembly The Pump and Analyzers Assembly in the Vmax Encore 29 differs from the one in the Vmax Encore 229 in two respects listed below. • It does not have a multi-gas analyzer.
  • Page 36 Hardware Devices Not Installed The following devices are used only in pulmonary function tests where inspired test gases are required. These devices are not standard in the Vmax Encore 29 Instrument and are installed only when ordered as an option.
  • Page 37 Chapter 2 System Description Vmax Encore Pump and Analyzers Assembly The Pump and Analyzers Assembly in the Vmax Encore 22 is the same as the assembly in the Vmax Encore 229. The assembly houses the Sample Pump, the O Sensor, the CO Analyzer, and the Multi-gas Analyzer.
  • Page 38 Vmax Encore 20 Block Diagram Hardware Devices Not Installed: Being a spirometry only system, the Vmax Encore 20 has no need for sample pumps or gas analyzers or the circuit board that controls any of those devices. Therefore, none of these devices are installed.

  • Page 39: Mass Flow Sensor Board

    Technical Reference Manual Chapter 2 System Description Vmax Encore MASS FLOW SENSOR BOARD Figure 2-8 Mass Flow Sensor Board Block Diagram The Mass Flow Sensor Board is the heart of the Vmax system. The block diagram of the circuit board is shown on the previous page and below is an enumerated list of the board’s functions.
  • Page 40 Chapter 2 System Description Technical Reference Manual Vmax Encore MASS FLOW SENSOR BOARD FUNCTIONS • Controls system logic and data flow to and from the PC. • Provides buffering of I/O data for communicating with the PC • Sensing and conditioning of the Mass Flow Sensor signal •...
  • Page 41 Technical Reference Manual Chapter 2 System Description Vmax Encore following data read or data write operation. The data write state sets data on the data bus to be sent to the addressed circuit to control a particular function such as “Select a channel of the Mass Flow Sensor Board’s 16 channel multiplexer”...
  • Page 42 Resistances of the sensor cables, cable connectors, and the supporting pins can limit the accuracy of the filament resistance measurements. The new Vmax Encore Mass Flow Sensor gets around these limitations by employing an additional set of non-current carrying sensor cables and metal pins to provide the filament voltages to the electronic data processing circuits inside the Vmax module.
  • Page 43 Chapter 2 System Description Vmax Encore contributions from the filament supports, cables, and connectors. As a result, the Vmax Encore Mass Flow Sensor is more sensitive and stable, and it stays calibrated over a longer period of time. Since the reference filament resistance is determined by its temperature, Kelvin Sensing provides accurate reading of the gas temperature as well.
  • Page 44 Chapter 2 System Description Technical Reference Manual Vmax Encore Figure 2-11 Output Voltage Gain Comparison to Ideal The digital equivalent of the Mass Flow Sensor output signal is multiplied by a number determined during the calibration procedure to correct the gain.
  • Page 45 Technical Reference Manual Chapter 2 System Description Vmax Encore 2. Select F1 on the Flow Volume Calibration screen. The Mass Flow Sensor Zero dialog box will be displayed. 3. Attach the calibration syringe to the Mass Flow Sensor using a cardboard mouthpiece and calibration hose or by using the calibration adapter.
  • Page 46 Chapter 2 System Description Technical Reference Manual Vmax Encore turn to green when the mean flow rate of a stroke falls within the adjacent range. If you complete 15 strokes, or the three-minute clock reaches zero, before you turn on the...
  • Page 47 Technical Reference Manual Chapter 2 System Description Vmax Encore Verification Procedure Perform this procedure before testing each patient to prevent errone- AUTION ous test results. 1. On the Flow Volume Calibration screen, select F2. 2. Perform five full inspiratory and full expiratory verification strokes of the syringe. Perform these strokes at the ATS (American Thoracic Society) recommended flow rates.
  • Page 48 Chapter 2 System Description Technical Reference Manual Vmax Encore 1. Select F4 on the Flow Volume Calibration screen to access the Pressure Calibration win- dow (Figure 2-13). Figure 2-13 Pressure Calibration window 2. Close and latch the cabin door. Make sure the gas cylinder is completely turned on and the secondary pressure gauge is set between 50 and 60 PSI (345–414 k Pa).
  • Page 49 Technical Reference Manual Chapter 2 System Description Vmax Encore Do not proceed with patient testing if the following warning message is AUTION displayed. Proceeding under this condition could cause erroneous test results. This message means that one or both of the calculated calibration factors are out of range.
  • Page 50 Chapter 2 System Description Technical Reference Manual Vmax Encore 1. Select F4 on the Flow Volume Calibration screen to access the Pressure Calibration window (Figure 2-13 on page 22). 2. Close and latch the cabin door. Make sure the gas cylinder is completely turned on and contains adequate pressure.
  • Page 51 Technical Reference Manual Chapter 2 System Description Vmax Encore BAROMETRIC PRESSURE CIRCUITRY The barometric pressure transducer is comprised of a silicon chip with an integral sensing diaphragm and four piezoresistors encased in a plastic housing and mounted on the Mass Flow Sensor Board.

  • Page 52: Analyzer Controller Board

    Chapter 2 System Description Technical Reference Manual Vmax Encore ANALYZER CONTROLLER BOARD The Analyzer Control Board is another main circuit board that carries out many functions. Its main function is to provide signal-conditioning circuits for all the system’s analyzers and to provide source voltages for the CO and Multi-gas analyzers.

  • Page 53: Pressure Board

    Technical Reference Manual Chapter 2 System Description Vmax Encore PRESSURE BOARD The Pressure Board is basically a mounting board for devices whose signals are processed on the Mass Flow Sensor Board. The functions of the Pressure Board are listed below.
  • Page 54 Vmax Encore Technical Reference Manual 2–28 L2707...

  • Page 55: Maintenance And Troubleshooting

    Technical Reference Manual Vmax Encore CHAPTER 3 MAINTENANCE AND TROUBLESHOOTING MAINTENANCE Install all items provided in the Annual Performance Check Kit (P/N 771635): CLEANING 1. Remove all dust and dirt from all interior and exterior surfaces of the cart, console, or table.
  • Page 56 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore FRC SYRINGE VERIFY PROCEDURE The FRC Syringe Verify Procedure can be used to check the accuracy and integrity of the entire Gas Dilution FRC test circuit. • Perform a Mass Flow Sensor calibration and an analyzer calibration before proceeding with the FRC Syringe Verify Procedure.
  • Page 57 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore 0511822 Figure 3-1 Calibration Syringe Adjustment/Attachment for FRC Verify Note: Do not use the flexible Calibration Adapter or any mixing chamber hose to connect the syringe to the Mass Flow Sensor; use the plastic FRC Adapter.
  • Page 58 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore 10. Continue stroking the syringe until the message, “N Stability Criteria Met” is displayed. Select Space to End and disconnect the syringe from the Mass Flow Sensor. The %Pred value displayed in the Text Box should be between 97–103. If it is not, you should check the breathing circuit and syringe attachment for poor connections or incorrect setup and then perform the procedure again.
  • Page 59 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Figure 3-2 Lung volume standard setup components 2. Disconnect the pressure tubing from the patient mouth port and connect it to the clear plastic pressure tube on the top of the Lung Volume Standard.
  • Page 60 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Mean Volume as a percent of Target Entered volume Volume—this is of Lung Volume the most Standard important value on the screen Enter volume of Initiates the Lung Volume verification Standard here.
  • Page 61 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore 11. Select F3 or Esc to exit and return to the Plethysmograph Pressure Calibration Menu. ADJUSTMENTS Before troubleshooting a problem with a pressure transducer, flow transducer, or gas analyzer, perform the procedures in this section to ensure that the transducers or analyzers have been properly aligned.
  • Page 62 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore b. Select valve L (DLCO). Turn DLCO Supply OFF. Pressure should not drop by more than 100 PSI, within 2 minutes. If so, locate source of leak and correct. c. Turn DLCO supply ON when Leak Test is verified to be OK.
  • Page 63 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Access the Diagnostics Test Screen To access the diagnostics test screen, from the Vmax Program Manager screen, select Diagnostics from the menu bar. Figure 3-5 Vmax Diagnostics Test Screen 3–9...
  • Page 64 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Figure 3-6 Mass Flow Sensor Board Component Layout Temperature Transducer Adjustment The temperature transducer must be adjusted to match the ambient temperature measured by a calibrated thermometer. Note: Make sure the unit is warmed up for 30 minutes before making adjustments.
  • Page 65 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore 3. Adjust R92 to (ambient barometric pressure in mm Hg / 100) V dc ± 0.01 V dc. Example: If the ambient barometric pressure is 755 mm Hg, adjust R17 to 7.55 V dc.
  • Page 66 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore ANALYZER CONTROL BOARD ADJUSTMENT PROCEDURES Figure 3-7 Analyzer Control Board Component Layout As with the Mass Flow Sensor Board adjustments, the test points and adjustment potentiometers for the procedures listed below are located on the Analyzer Control Board. The voltages can be monitored with a voltmeter at the designated test points or by viewing the voltages on the Diagnostics Test screen.
  • Page 67 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Analyzer Zero Adjustment The CO analyzer’s zero voltage must be adjusted to ensure proper operation. The adjustment procedure is outlined below. 1. On the Analyzer Controller board, connect the DVM positive lead to TP3 (CO ) and the neg- ative lead to AGND (analog ground).
  • Page 68 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Sensor Replacement This procedure provides instructions for removing and replacing the O sensor, which must be replaced annually. Turn off and unplug your system before removing the cover of the unit.
  • Page 69 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Figure 3-8 Cover Screws 3. Unfasten the strap that secures the O sensor, which is at the front of the module (Figure 3- 3–15 L2707...
  • Page 70 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Figure 3-9 Sensor Retaining Strap Do not twist or pull the ribbon cable up or down. Twisting or pulling the AUTION cable could damage the connector pins. 4. Disconnect the ribbon cable by carefully pushing outward on the two locking “ears” of the connector (Figure 3-10).
  • Page 71 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Figure 3-10 Ribbon Cable Connection 5. Disconnect the luer fittings (Figure 3-11). Figure 3-11 Luer Fittings 3–17 L2707...
  • Page 72 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore 6. Carefully lift the old O sensor out of the cradle and set the sensor aside. 7. Remove the new O sensor from the packing tube, and inspect the sensor for damage. Put the old sensor into the packing tube and replace the lid.
  • Page 73 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Analyzer Zero Adjustment Matrix The table below is a quick reference to the adjustment potentiometers, voltmeter lead placements, voltages and tolerances for the Vmax Systems analyzer zero adjustments. Table 3-1: Analyzer Zero Adjustments...
  • Page 74 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore 15. From the main menu of the Vmax software, select . Connect a 3-liter syringe to the Diagnostics flow sensor then select valves G. Body Box Calibration Procedure for V62/62J 1.
  • Page 75 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore 6. Select F1 (Shunt), then inspire and expire using the 3-liter syringe connected to the mass flow meter inside the cabin. Observe the "Dir" signal on the Test Display. Inspiring generates a negative voltage;...
  • Page 76 12. If a system fails the calibration or verification two or more times, check (or consider chang- ing) one of the test items used with the Vmax Encore to correct the problem. If, the problem persists, check and change the adjustments on the MFS board in the Vmax Encore module, and repeat the tests.

  • Page 77: Troubleshooting

    Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore TROUBLESHOOTING Troubleshooting a particular problem entails observing the symptoms and eliminating possible causes until the problem is found. The best course of action is to first verify that only one device has a problem. If more than one device has a problem, check if those devices share common processors, voltages, A/D converters etc.
  • Page 78 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore SYSTEM DIAGNOSTICS The Diagnostics feature gives all operators the ability to help technical support personnel troubleshoot problems and the ability to verify specific functions. All diagnostic information is provided in one location: the Test Display window.
  • Page 79 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore Figure 3-15 depicts a Test Display window of an Encore on an arm (non- Autobox) in a calibrated state. 0516002 Figure 3-15 Test Display window—Encore on an arm (non-Autobox) in a calibrated state...
  • Page 80 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Displays a voltage representing a pressure signal. The sign (positive/negative) of the zeroed pressure signal represents the direction of the flow Voltage representing the flow sensor. E1 of 3.2ish represents a valid calibration when...
  • Page 81 Technical Reference Manual Chapter 3 Maintenance and Troubleshooting Vmax Encore F6 Sample pump When checked sample pump is turned on When checked, zeros all pressure transducers and checks the shunt box so that the F7 Pressure Zero system is referenced to ambient...
  • Page 82 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Autobox O Transmural Inflates the right balloon valve when checked P Rebreathe Inflates the left balloon valve when checked Allows O and P to work, when balloons inflated and Q is disabled the balloons should...

  • Page 83: Replacement Parts

    Pneumatics Assembly SOL IN Cable, PC Interface, Console/Table 25 Pin “D” M/M 6 Ft. Connects PC’s Printer Port to Vmax Encore Analyzer Assembly’s I/O Port 770796 (I/O 1, 2, or 3) when Configured as Vmax Encore Console or Table Top System 3–29...
  • Page 84 Technical Reference Manual Vmax Encore Cable, PC Interface, LC Cart 25 Pin “D” M/M 16 In. Connects PC’s Printer Port to Vmax Encore Analyzer Assembly’s I/O Port 770795 (I/O 1, 2, or 3) when Configured as Vmax Encore LC Cart System...
  • Page 85 Tube assembly direction sense 769288 Tube assembly, 2 lumen, balloon valve 769846 Tube assembly, S0S1 772551 Tube, 2 lumen, balloon (Vmax Encore 62J/62W) 769521 Tube, 4 lumen (Vmax Encore 62J/62W) 769526 Tube, direction sensor (Vmax Encore 62J/62W) 769524-101 Tube, sample 769525 3–31...
  • Page 86 Chapter 3 Maintenance and Troubleshooting Technical Reference Manual Vmax Encore Valve Assembly, One-Way Breathing Modified Hans Rudolph Valve Used for Metabolic Tests in Mixing Chamber Exercise and Indirect 769704 Calorimetry Modes Valve, 2-way 775323 Valve, 3-way 775321 3–32 L2707...

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