Fluke VT Mobile User Manual

VT MOBILE

Gas Flow Analyzer

February 2006

Operators Manual

Warranty and Product Support

Fluke Biomedical warrants this instrument against defects in materials and workmanship for one full year from the date of original purchase. During the warranty period, we will repair or, at our option, replace at no charge a product that proves to be defective, provided you return the product, shipping prepaid, to Fluke Biomedical. This warranty does not apply if the product has been damaged by accident or misuse or as the result of service or modification by other than Fluke Biomedical. IN NO EVENT SHALL FLUKE BIOMEDICAL BE LIABLE FOR CONSEQUENTIAL DAMAGES.

Only serialized products and their accessory items (those products and items bearing a distinct serial number tag) are covered under this one–year warranty. PHYSICAL DAMAGE CAUSED BY MISUSE OR PHYSICAL ABUSE IS NOT COVERED UNDER THE WARRANTY. Items such as cables and nonserialized modules are not covered under this warranty.

Recalibration of instruments is not covered under the warranty.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state, province to province, or country to country. This warranty is limited to repairing the instrument to Fluke Biomedical’s specifications.

Warranty Disclaimer

Should you elect to have your instrument serviced and/or calibrated by someone other than Fluke Biomedical, please be advised that the original warranty covering your product becomes void when the tamper-resistant Quality Seal is removed or broken without proper factory authorization. We strongly recommend, therefore, that you send your instrument to Fluke Biomedical for factory service and calibration, especially during the original warranty period.

Notices

 Copyright 2006, Fluke Biomedical. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language without the written permission of Fluke Biomedical.

Fluke Biomedical agrees to a limited copyright release that allows you to reproduce manuals and other printed materials for use in service training programs and other technical publications. If you would like other reproductions or distributions, submit a written request to Fluke Biomedical.

Unpacking and Inspection

Follow standard receiving practices upon receipt of the instrument. Check the shipping carton for damage. If damage is found, stop unpacking the instrument. Notify the carrier and ask for an agent to be present while the instrument is unpacked. There are no special unpacking instructions, but be careful not to damage the instrument when unpacking it. Inspect the instrument for physical damage such as bent or broken parts, dents, or scratches.

Technical Support

For application support or answers to technical questions, either email techservices@flukebiomedical.com or call 1-800-648-7942 or 1-425-446-6945.

Claims

Our routine method of shipment is via common carrier, FOB origin. Upon delivery, if physical damage is found, retain all packing materials in their original condition and contact the carrier immediately to file a claim. If the instrument is delivered in good physical condition but does not operate within specifications, or if there are any other problems not caused by shipping damage, please contact Fluke Biomedical or your local sales representative.

Standard Terms and Conditions

Refunds and Credits

Please note that only serialized products and their accessory items (i.e., products and items bearing a distinct serial number tag) are eligible for partial refund and/or credit. Nonserialized parts and accessory items (e.g., cables, carrying cases, auxiliary modules, etc.) are not eligible for return or refund. Only products returned within 90 days from the date of original purchase are eligible for refund/credit. In order to receive a partial refund/credit of a product purchase price on a serialized product, the product must not have been damaged by the customer or by the carrier chosen by the customer to return the goods, and the product must be returned complete (meaning with all manuals, cables, accessories, etc.) and in “as new” and resalable condition. Products not returned within 90 days of purchase, or products which are not in “as new” and resalable condition, are not eligible for credit return and will be returned to the customer. The Return Procedure (see below) must be followed to assure prompt refund/credit.

Restocking Charges

Products returned within 30 days of original purchase are subject to a minimum restocking fee of 15 %. Products returned in excess of 30 days after purchase, but prior to 90 days, are subject to a minimum restocking fee of 20 %. Additional charges for damage and/or missing parts and accessories will be applied to all returns.

Return Procedure

All items being returned (including all warranty-claim shipments) must be sent freight-prepaid to our factory location. When you return an instrument to Fluke Biomedical, we recommend using United Parcel Service, Federal Express, or Air Parcel Post. We also recommend that you insure your shipment for its actual replacement cost. Fluke Biomedical will not be responsible for lost shipments or instruments that are received in damaged condition due to improper packaging or handling.

Use the original carton and packaging material for shipment. If they are not available, we recommend the following guide for repackaging:

 Use a double–walled carton of sufficient strength for the weight being shipped.  Use heavy paper or cardboard to protect all instrument surfaces. Use nonabrasive material around all projecting parts.  Use at least four inches of tightly packed, industry-approved, shock-absorbent material around the instrument.

Returns for partial refund/credit:

Every product returned for refund/credit must be accompanied by a Return Material Authorization (RMA) number, obtained from our Order Entry Group at 1-800-648-7952 or 1-425-446-6945.

Repair and calibration:

To find the nearest service center, goto www.flukebiomedical.com/service

In the U.S.A.: Cleveland Calibration Lab Tel: 1-800-850-4606 Email: globalcal@flukebiomedical.com

Everett Calibration Lab Tel: 1-800-850-4606 Email: service.status@fluke.com

In Europe, Middle East, and Africa: Eindhoven Calibration Lab Tel: +31-402-675300 Email: ServiceDesk@fluke.com

In Asia: Everett Calibration Lab Tel: +425-446-6945 Email: service.international@fluke.com

Certification

This instrument was thoroughly tested and inspected. It was found to meet Fluke Biomedical’s manufacturing specifications when it was shipped from the factory. Calibration measurements are traceable to the National Institute of Standards and Technology (NIST). Devices for which there are no NIST calibration standards are measured against in-house performance standards using accepted test procedures.

WARNING

Unauthorized user modifications or application beyond the published specifications may result in electrical shock hazards or improper operation. Fluke Biomedical will not be responsible for any injuries sustained due to unauthorized equipment modifications.

Restrictions and Liabilities

Information in this document is subject to change and does not represent a commitment by Fluke Biomedical. Changes made to the information in this document will be incorporated in new editions of the publication. No responsibility is assumed by Fluke Biomedical for the use or reliability of software or equipment that is not supplied by Fluke Biomedical, or by its affiliated dealers.

Manufacturing Location

The VT MOBILE is manufactured in Everett, WA, U.S.A.

Symbols

Symbol Description

W P

)

12V DC F

M 9V NEDA 1604A

6F22 006P

‚

See Operators Manual.

Manufacturer’s declaration of product compliance with applicable EU directives

CSA Listing mark

Battery Eliminator input

Do not mix with solid waste stream. Dispose of using a qualified recycler or hazardous material handler.

9-volt battery

Flow Port

Pressure Port

Temperature and Relative Humidity Port

Oxygen Sensor Port

Battery Eliminator Port

Miniature RS232 Port

WXWarning. Read before using Analyzer.

To avoid personal injury, follow these guidelines:

 Do not use the VT MOBILE in any manner not specified in the Operator’s

Manual. Otherwise, the protection provided by this product may be impaired.

 When measuring oxygen, always keep all components of test setup well away

from open flame or other combustion-starting devices.

 Use in well-ventilated space. Be aware that a gas defined with VT for Windows

software as ‘User’ may be unknown while using the VT MOBILE.

 For high pressure measurements, always turn off gas source before

connection or disconnection of VT MOBILE. Be aware that there is no pressure indication on the VT MOBILE screen when VT for Windows software is in control.

• Always press power off on the VT MOBILE and unplug the battery eliminator

before cleaning the outer surface.

• Inspect the product, if the instrument appears damaged or appears to operate

in a manner not specified in the manual, DO NOT CONTINUE USE. Return the product for service.

• Avoid spilling liquids on the analyzer; fluid seepage into internal components

creates corrosion and a potential shock hazard. Do not operate the instrument if internal components are exposed to fluid.

• Do not open this product. There are no user replaceable parts.

WCaution

The VT MOBILE should be calibrated annually. Only qualified technical personnel should perform troubleshooting and service procedures on the VT MOBILE.

Do not expose the system to temperature extremes. Ambient operating temperatures should remain between 10 and 40 °C. System performance may be adversely affected if temperatures fluctuate above or below this range.

Clean only with a damp, lint-free cloth, using a mild detergent, and wipe down gently.

Chapter Title Page

1 Introducing the VT MOBILE................................................................ 1-1

Introduction........................................................................................................ 1-1

Operation, Storage, and Maintenance................................................................ 1-1

Features.............................................................................................................. 1-2

About This Manual ............................................................................................ 1-2

2 Preparing for Operation...................................................................... 2-1

Unpacking the VT MOBILE ............................................................................. 2-1

Powering Up ...................................................................................................... 2-3

Using the Tilt Bail.............................................................................................. 2-3

Using the Keys................................................................................................... 2-4

Selecting the Operating Mode ........................................................................... 2-4

Setting Up .......................................................................................................... 2-5

Selecting the Gas Type.................................................................................. 2-5

Gas Temperature and Relative Humidity ...................................................... 2-5

Selecting the Correction Mode...................................................................... 2-5

Setting the Breath Detect Threshold.............................................................. 2-6

Setting Zero Warn ON or OFF...................................................................... 2-6

Setting the Time ............................................................................................ 2-7

Setting the Date ............................................................................................. 2-7

Selecting the Date Format ............................................................................. 2-8

Setting the Contrast ....................................................................................... 2-8

Checking Version and Serial Numbers ......................................................... 2-8

Connecting the Analyzer ................................................................................... 2-8

High-Flow Connection .................................................................................. 2-9

Low-Flow Connection................................................................................... 2-9

High-Pressure Connection............................................................................. 2-9

Low-Pressure Connection ............................................................................. 2-9

Ventilator Test Connections .......................................................................... 2-10

3 Using the VT MOBILE.......................................................................... 3-1

Understanding the Controls and Indicators........................................................ 3-1

Screens............................................................................................................... 3-4

Ventilator Parameters Screens....................................................................... 3-4

VT MOBILE

Operators Manual

Waveform Screens......................................................................................... 3-6

Other Measurements Screens ........................................................................ 3-9

Special Functions Screens ............................................................................. 3-10

Using Trend Test ............................................................................................... 3-12

Making Measurements....................................................................................... 3-14

Working with Memory ...................................................................................... 3-14

Printing .............................................................................................................. 3-14

Making a Measurement More Accurate ............................................................ 3-14

Warm-up and Zeroing ................................................................................... 3-14

Oxygen Sensor............................................................................................... 3-16

Verifying Oxygen Sensor Calibration ........................................................... 3-16

Calibrating the Oxygen Sensor...................................................................... 3-16

Using the Temperature and Relative Humidity Sensor ................................. 3-17

Checking Barometric Pressure ...................................................................... 3-18

Changing Barometric Pressure Units ............................................................ 3-19

Viewing Demo Data .......................................................................................... 3-19

Accessing Help .................................................................................................. 3-19

4 Checking Ventilator Parameters ........................................................ 4-1

Introduction........................................................................................................ 4-1

Checking Ventilator Parameters ........................................................................ 4-1

Understanding the Parameters ........................................................................... 4-3

5 Measuring Pressure ............................................................................ 5-1

Introduction........................................................................................................ 5-1

Measuring Low Pressure ................................................................................... 5-2

Measuring High Pressure................................................................................... 5-3

Measuring Airway Pressure............................................................................... 5-5

6 Measuring Flow and Volume.............................................................. 6-1

Introduction........................................................................................................ 6-1

Gas Settings................................................................................................... 6-1

Balance Gas Settings ..................................................................................... 6-1

Correction Modes .......................................................................................... 6-2

Flow Zeroing ................................................................................................. 6-2

Measuring Low Flow......................................................................................... 6-3

Measuring High Flow ........................................................................................ 6-4

Measuring Volume ............................................................................................ 6-5

7 Maintaining and Troubleshooting the VT MOBILE........................... 7-1

Introduction........................................................................................................ 7-1

Calibration and Service...................................................................................... 7-1

Battery................................................................................................................ 7-1

Cleaning............................................................................................................. 7-2

Verifying Oxygen Sensor Calibration ............................................................... 7-2

Replacing the Oxygen Sensor............................................................................ 7-3

Calibrating the Oxygen Sensor .......................................................................... 7-3

Troubleshooting................................................................................................. 7-4

Appendices

A VT for Windows.......................................................................................... A-1

B Specifications .............................................................................................. B-1

List of Tables

Table Title Page

1-1. VT MOBILE Versions........................................................................................... 1-1

2-1. Standard Accessories ............................................................................................. 2-2

2-2. Optional Accessories.............................................................................................. 2-2

2-3. Gas Types............................................................................................................... 2-5

2-4. Correction Modes................................................................................................... 2-6

3-1. Controls and Indicators .......................................................................................... 3-2

3-2. Ventilator Parameters............................................................................................. 3-4

4-1. Ventilator Parameters............................................................................................. 4-3

7-1. Troubleshooting the Analyzer................................................................................ 7-4

iii

VT MOBILE

Operators Manual

List of Figures

Figure Title Page

2-1. Key Available Accessories..................................................................................... 2-3

2-2. VT MOBILE Tilt Bail............................................................................................ 2-4

2-3. Low-Pressure/High-Flow/Low-Flow Connection.................................................. 2-8

2-4. High-Pressure Connection...................................................................................... 2-9

2-5. Ventilator Test Connections................................................................................... 2-10

3-1. Controls and Indicators .......................................................................................... 3-1

3-2. Flow Sensors and Pressure Adapters Disconnected............................................... 3-15

3-3. Flow Sensors and Pressure Adapters Connected ................................................... 3-15

3-4. Oxygen Sensor Calibration .................................................................................... 3-17

3-5. Measuring Temperature and Relative Humidity .................................................... 3-18

4-1. Ventilator Connections........................................................................................... 4-2

4-2. Accessing Calculated Parameters........................................................................... 4-4

4-3. Accessing Other Parameters................................................................................... 4-4

5-1. Measuring Low Pressure........................................................................................ 5-2

5-2. Accessing Low-Pressure Measurements ................................................................ 5-3

5-3. Measuring High Pressure ....................................................................................... 5-4

5-4. Accessing High-Pressure Measurements ............................................................... 5-4

5-5. Accessing Airway Pressure Measurements............................................................ 5-5

6-1. Measuring Low Flow ............................................................................................. 6-3

6-2. Accessing Low-Flow Measurements ..................................................................... 6-4

6-3. Measuring High Flow ............................................................................................ 6-5

6-4. Accessing High-Flow Measurements..................................................................... 6-5

7-1. Changing the Battery.............................................................................................. 7-2

7-2. Oxygen Sensor Calibration .................................................................................... 7-3

VT MOBILE

Operators Manual

Introduction

This Operators Manual provides complete operating instructions for the Fluke Biomedical VT MOBILE Gas Flow Analyzer (hereafter referred to as the Analyzer.) Seven language options support the available factory-set versions of the Analyzer. The overlay language identifies these.

The Analyzer is a general-purpose, portable gas flow analyzer with special modes designed specifically for testing mechanical patient ventilators. The Analyzer measures bi-directional flow in both high and low ranges as well as high- and low-pressure ranges. The Analyzer is not for use in the patient environment. Table 1-1 identifies Analyzer language versions.

The Analyzer measures the basic signals of pressure, flow, and oxygen. From these basic signals, the Analyzer computes other parameters. The Analyzer obtains volume from the integration, or summation, of the flow signal over a period of time.

Chapter 1

Introducing the VT MOBILE

Table 1-1. VT MOBILE Versions

Version Language Overlay

VT MOBILE US English

VT MOBILE FRA French

VT MOBILE DEU German

VT MOBILE ITAL Italian

VT MOBILE SPAN Spanish

VT MOBILE JPN Japanese

VT MOBILE CHI Chinese

Operation, Storage, and Maintenance

Operate the Analyzer in a dry area within temperature limits of 10 °C to 40 °C. The maximum operating relative humidity at temperatures up to 31 °C is 80 % noncondensing, decreasing linearly to 50 % non-condensing at 40 °C.

Store the Analyzer at a temperature of -25 °C to 50 °C and at a non-condensing relative humidity of 0 to 95 %.

The battery is the only user-serviceable part in the Analyzer. For safety reasons, only an experienced technician should perform maintenance requiring other internal access.

1-1

VT MOBILE

Operators Manual

Features

Features include:

• Percent Oxygen Measurement. An oxygen sensor measures the oxygen percent of the

gas in series with the high- or low-flow channel of the Analyzer. Maxtec oxygen sensor distributed by Fluke Biomedical.

• Breath Parameters. The Analyzer measures 16 parameters on each detected breath.

These parameters include tidal volume, minute volume, inspiratory and expiratory pressures, etc.

• Selectable Units. The Analyzer allows you to select the desired units for each of the

measured signals. For example, pressures can be displayed in mmHg, kPa, bar, mbar, atm, inH2O, inHg, cmH2O or mmHg.

• Gas Type. Select the gas type from a pre-defined list, or, using the VT for Windows

software, specify a user-defined gas.

• Trend Testing. The Analyzer provides an automated test to see if a predetermined

parameter deviates from limits you set.

• Evaluations/Troubleshooting. Use the Analyzer for pre-purchase evaluations of

ventilators, incoming and routine performance verification, and troubleshooting clinical problems, as well as teaching principles of mechanical ventilation.

• Computer Control, Data Logging, and Printing. A miniature RS232 serial port allows

connection to a personal computer for external Analyzer control, data logging of test results, and printing. The Analyzer is compatible with Fluke Biomedical’s VT for Windows PC software (version 2.01.00 or higher.)

•

Lung Simulator. The Analyzer operates with or without a test lung attached. Use the optional Fluke Biomedical ACCU LUNG as a test lung with integrated airway restrictors that assist you in evaluating intermittent errors.

About This Manual

This manual provides a complete description of the Analyzer and its applications. The manual contains information for beginners as well as experts in mechanical ventilator evaluation and separate measurement of pressure, flow, and volume.

Chapters are as follows:

• Chapter 1: Introducing the VT MOBILE. An introduction to the Analyzer

• Chapter 2: Preparing for Operation. Unpacking and setting up the Analyzer

• Chapter 3: Using the VT MOBILE. How to use the keys and interpret the screens

• Chapter 4: Checking Ventilator Parameters. How to access and interpret the 16

ventilator parameters

• Chapter 5: Measuring Pressure. How to measure high and low pressure

• Chapter 6: Measuring Flow and Volume. How to measure high and low flow and

derive volume

• Chapter 7: Maintaining and Troubleshooting the VT MOBILE. How to perform

maintenance and routine troubleshooting

• Appendix A: VT for Windows PC Software

• Appendix B: Specifications

1-2

Preparing for Operation

Unpacking the VT MOBILE

Before unpacking the Analyzer, visually inspect the shipping box for damage. If no damage is evident, unpack the Analyzer and its accessories from the shipping carton. Table 2-1 lists the standard accessories included in the box. Save the foam inserts and shipping box. You must use the original packing materials when shipping the Analyzer for service or re-calibration. If the original shipping carton and packing materials are not available, call a Fluke Biomedical service representative for assistance.

Identify accessories for your Analyzer with the aid of Tables 2-1, 2-2 and Figure 2-1. Check for missing parts. Carefully inspect the unit for damage such as cracks, dents, or bent parts. If items are missing or any physical damage is apparent, call Fluke Biomedical for assistance. For information on ways to contact Fluke Biomedical, see the section in this manual called “Support.” Also, notify the carrier if the damage appears to be the result of a shipping mishap.

Chapter 2

2-1

VT MOBILE

Operators Manual

Accessory Kit 2548405

High-Flow Sensor 2438334

High-Pressure Adapter (Luer to Male Nut/Nipple D.I.S.S. Oxygen) 2548303

Low-Pressure Adapter 2454175

Oxygen Sensor 2448801

Oxygen Sensor Cable 6 ‘ 2448051

‘T’, 15 mm ID, 22 mm ID, 15 mm ID end 2457028

VT MOBILE RS232 Cable, 6’ 2075257

9 VDC Battery (Alkaline) 614487

Battery Eliminator 2547455

Soft Carrying Case 2523995

Information Packet: Getting Started Manual; Quick Reference Card; CD with Quick Reference Card, Getting Started Manual, Operators Manual, VT for Windows (V2.01.00 +)

Table 2-1. Standard Accessories

Item Part Number

2544926

Table 2-2. Optional Accessories

Item Part No.

Low-Flow Sensor 2438352

High-Pressure Adapter (Luer to Female D.I.S.S. Oxygen) 2548315

Temperature and RH Sensor Assembly 2541622

Serial Communications Cable (RS232) DB9F to miniature RS232, 6’ 2075257

Power Adapter, Universal (USA and International) 2118212

ACCU LUNG Portable, Precision Test Lung 2387318

2-2

Preparing for Operation Powering Up

High-Flow

Sensor

Low-Pressure

Adapter

Powering Up

RS232

Cable

Low-Flow

Sensor

High-Pressure

Adapters

Figure 2-1. Key Available Accessories

Oxygen

Sensor

Temperature/RH

Sensor

ACCU LUNG

ede03f.eps

1. Press the Power key (H) to power on the Analyzer. The Analyzer displays the power up

screen for several seconds.

2. The Analyzer then prompts you for the zeroing procedure. Place the Analyzer on a flat

surface, and, if necessary, disconnect flow and pressure sensors.

Warning

Make sure pressure is set to zero before disconnecting the High-Pressure Adapter. Exposure to high pressure could cause personal injury.

3. Press G (Ok). The Analyzer now performs the zeroing procedure. After several seconds, the Tidal Volume screen appears and the Analyzer is ready for use. If you have pressed R to initiate the zero procedure, the Analyzer returns to the previous screen displayed.

Note

If the Analyzer encounters a power problem (such as a backwards battery), thermal overload devices interrupt normal operation. Repair the problem, wait several seconds, and resume normal operation.

Using the Tilt Bail

As shown in Figure 2-2, you can use the Analyzer in flat or elevated positions. Do not use the Analyzer by hand or during transport.

2-3

VT MOBILE

Operators Manual

RELEASE

HERE

Figure 2-2. VT MOBILE Tilt Bail

edg21f.eps

Using the Keys

Press each key firmly; the Analyzer responds to a recognized key press with a beep. Generally, you can exit one function by selecting another function. Press the B and C navigation keys to cycle through multiple functions accessed from one key. Relevant functions for the two softkeys (F and G) appear in the display immediately above these keys. When text entry is necessary, quickly press a key to cycle through the characters it accesses. Pause to accept the present character and move to the next entry. Think of text entry as text messaging, as you would encounter on a cell phone.

Note

If the Zero warning screen appears at any time, follow on-screen directions

and then press

; the interrupted function will continue automatically

after the zeroing procedure.

Selecting the Operating Mode

Local Mode is the default setting upon powering up the Analyzer. In Local Mode, select functions by pressing keys on the front panel.

To change modes from Local to Remote, first connect the serial cable to both the PC and the miniature RS-232 serial port on the Analyzer. Launch VT for Windows software (version 2.01.00 or higher) to activate Remote Mode.

If VT for Windows has remote control, the following appears on the Analyzer display screen:

2-4

No Graphics Available, While Communications Are Active

Normal local key presses have no effect. Press G (Cancel) to regain local control.

Preparing for Operation Setting Up

Setting Up

Press D to access Analyzer settings. (Press G to return to the measurement screen.)

Selecting the Gas Type

Ensure that you have selected the gas or gas mixture you will be using, as the gas density will be different for each gas type and mixture. The Analyzer uses this information to improve the accuracy of the flow calculations. Failure to enter the correct value will cause the flow and volume calculations to be in error.

Select the gas type by pressing

D Æ E Æ E Æ B or C Æ E.

Available selections are: Air, O2, Heliox, CO2, N2, N2O, N2O/O2 (N2O balance O2), He/O2 (He balance O2), N2/O2 (N2 balance O2), and User. Refer to Table 2-3 for descriptions of gas types. Only the VT for Windows software can identify a ‘User’ gas.

Table 2-3. Gas Types

Gas Description

Air Standard room air

O2 100% Oxygen

Heliox 30% Oxygen and 70% Helium blend

CO2 100% Carbon Dioxide

N2 100% Nitrogen

N2O 100% Nitrous Oxide

N20 bal O2 Measured Oxygen balance Nitrous Oxide

He bal O2 Measured Oxygen balance Helium

N2 bal O2 Measured Oxygen balance Nitrogen

User User selects custom gas mixture. This option requires the VT for Windows PC software.

Gas Temperature and Relative Humidity

These parameters are not really settings, but are available when the optional Temperature and Relative Humidity Sensor is connected. The Analyzer measures the gas flowing through the sensor and uses this information to improve the accuracy of the flow measurements. All temperatures are in degrees Celsius.

Selecting the Correction Mode

This setting calculates the flow volume of the air flowing through the high or low-flow ports. Ensure that the correction mode setting matches the one used by the ventilator or anesthesia machine manufacturer for their display of flow and volume measurements. If the correction mode is unknown, select “ATP” (Ambient Temperature and Pressure). Refer to Table 2-4 for descriptions of the correction modes.

The Analyzer can operate with a correction mode of ATP, STPD

, BTPS, or STPD0.

Select the mode as follows:

1. Press

D Æ E Æ C (to ‘Corr Mode’)

2. Press E Æ C (to select mode)

3. Press E to activate your selection.

2-5

VT MOBILE

Operators Manual

Mode Name Description

Table 2-4. Correction Modes

ATP Ambient Temperature

and Pressure

BTPS Body Temperature and

Pressure Saturated with water vapor

STPD0 Standard Temperature

and Pressure Dry, 0 °C

STPD21 Standard Temperature

and Pressure Dry, 21 °C

The Analyzer corrects the flow rate (and therefore, volume) such that the reported flow equals the flow if the gas temperature and pressure are at ambient (room) temperature and pressure.

The Analyzer corrects the flow rate (and therefore, volume) such that the reported flow equals the flow if the gas temperature and pressure were changed to body conditions (37 °C and ambient pressure). Further, the Analyzer compensates the flow to add the amount of water vapor as if to make the gas fully saturated (i.e. 100% relative humidity). In this correction, the Analyzer uses the relative humidity reading to determine the amount of water vapor that would need to be added.

The Analyzer corrects the flow rate (and therefore, volume) such that the reported flow equals the flow if the gas temperature and pressure were changed to standard conditions (0 °C and 760 mmHg). Further, the Analyzer compensates the flow to subtract the amount of water vapor as if the gas was dry (i.e. 0% relative humidity). In this correction, the Analyzer uses the relative humidity reading to determine the amount of water vapor that would need to be subtracted.

The Analyzer corrects the flow rate (and therefore, volume) such that the reported flow equals the flow if the gas temperature and pressure were changed to standard conditions (21°C and 760 mmHg). Further, the Analyzer compensates the flow to subtract the amount of water vapor as if the gas was dry (i.e. 0% relative humidity). In this correction, the Analyzer uses the relative humidity reading to determine the amount of water vapor that would need to be subtracted.

Setting the Breath Detect Threshold

The Analyzer breath detection algorithm uses a flow rate threshold that the inspiratory flow must cross to trigger a change in the breath phase. Higher flow rate thresholds yield less sensitive breath detection. Lower thresholds yield more sensitive breath detection.

The default setting of 2.00 lpm is usually appropriate for the ventilators and anesthesia machines being tested. This setting tells the Analyzer how to divide the delivered flow into breaths. If necessary, adjust the Breath Detect Threshold up or down until the breath rate reported on the Analyzer Timing display matches the ventilator breath rate.

Set the threshold as follows:

1. Press

D Æ E Æ C (to ‘BD Thresh’).

2. Press E Æ C or B (to change threshold in increments of 0.25). You can

also use text entry to enter a new value directly.

3. Press E to activate your selection.

Setting Zero Warn ON or OFF

You need to "zero" (or calibrate) the pressure and differential pressure (flow) sensors in the Analyzer to a zero reference. This “zero” reminder function can be set to occur automatically at pre-determined intervals or only when you request the function by pressing R. The Zero Warn is helpful in reminding you to stop and zero the transducers from time-to-time during operation. This is especially important during the 40-minute warm-up to full stability. The Analyzer does not calculate breath parameters for any breath in which a zero occurs. For this reason, it may be desirable to turn off automatic zeroing for a short while during a critical test.

2-6

Preparing for Operation Setting Up

The Analyzer Zero Warn is set to ON at the factory to remind you to zero out any offset in the Flow measurements. The Zero Warn screen reminds you at power on, after the first five minutes, and then after each 30-minute period. After the power-on zero warning, you can choose to Zero or Cancel when the reminder appears; either action returns the Analyzer to the same function.

W Caution

Setting Zero Warn to OFF may result in introduction of offset into the Flow and Volume measurements and cause errors in the assessment of those measurements against the medical device under test specification. Fluke Biomedical strongly recommends that you leave Zero Warn ON.

Turn this warning on or off using the following procedure:

1. Press

2. Press E Æ C (to select ON or OFF).

3. Press E to activate your selection.

Setting the Time

You can set hours and minutes. Enter the time in the HHMM or HMM format, where HH or H is the hours in 12-hour format and MM is the minutes (00 through 59).

To set the time, follow these steps:

1. Press

2. Enter the hour (HH or H) with the text entry keys.

3. Press G.

3. Enter the minutes (MM) with the text entry keys.

4. Press F to select P (PM) or A (AM).

5. Press E.

Setting the Date

To set the date, follow these steps:

1. Press

D Æ C Æ E Æ C Æ E to access the time setting screen.

D Æ CÆEÆ E to access the date setting screen.

D Æ E Æ C (to ‘Zero Warn’).

2. Enter the month (MM) or day (DD), depending on the date format, with the text entry

keys.

3. Press G.

4. Enter the day (DD) or month (MM) with the text entry keys.

5. Press G.

6. Enter the year (YYYY) with the text entry keys.

7. Press E.

The Analyzer displays the date with the following information:

• MM is the number between 1 and 12 corresponding to the month.

• DD is the number between 1 and 31 corresponding to the day of the month.

• YYYY is the year.

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VT MOBILE

Operators Manual

Selecting the Date Format

The Analyzer uses either of the following date formats:

• M/D/Y

• D/M/Y

To change the format, follow these steps:

1. Press

2. Press C or C to select ‘M/D/Y’ or ‘D/M/Y’.

3. Press E to activate your choice.

4. Press G to return to the active display screen.

Setting the Contrast

Use the following procedure to change the screen contrast:

1. Press

2. Highlight Contrast by scrolling down with C.

3. Press E and adjust the contrast in either of the following ways:

Checking Version and Serial Numbers

Press

D Æ C Æ E Æ C Æ C Æ E

A Æ C Æ E.

• Press B or C to increment or decrement the contrast in steps of 10.

• Enter any contrast value directly using the text entry keys.

D Æ C Æ C Æ E to check the version and serial numbers.

Connecting the Analyzer

Connect the Analyzer for flow and pressure measurements as shown in Figures 2-3 and 2-4.

2-8

Figure 2-3. Low-Pressure/High-Flow/Low-Flow Connection

edg23f.eps

Preparing for Operation Connecting the Analyzer

Figure 2-4. High-Pressure Connection

High-Flow Connection

The High-Flow Sensor connects to the flow/low-pressure port on the top of the Analyzer. Connect the High-Flow Sensor in line using adapters from the Accessory Kit.

W Caution

Do not exceed a flow of 200 lpm through the high-flow port. Damage to the Analyzer could otherwise result.

edg22f.eps

Measure only dry gases using the high-flow port. Do not use this port to measure exhaled or artificially humidified gases.

Low-Flow Connection

The Low-Flow Sensor connects to the flow/low-pressure port on the top of the Analyzer. Connect the Low-Flow Sensor in line using adapters from the Accessory Kit.

Do not exceed a flow of 35 lpm through the low-flow port. Damage to the Analyzer could otherwise result.

Measure only dry gases using the low-flow port. Do not use this port to measure exhaled or artificially humidified gases.

High-Pressure Connection

The High-Pressure Adapter connects to the high-pressure port on the top of the Analyzer. The connector mates to standard oxygen DISS fittings as used on oxygen supply hoses. Connectors are available with male or female fittings. Do not apply fluid to the highpressure port.

Do not exceed a pressure of 125 psi at the high-pressure port. Damage to the Analyzer could otherwise result.

W Caution

Low-Pressure Connection

The Low-Pressure Adapter connects to the flow/low-pressure port on the top of the Analyzer. Do not apply fluid to the low-pressure port.

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VT MOBILE

Operators Manual

Ventilator Test Connections

W Caution

Do not exceed a pressure of 5 psi at the low-pressure port. Damage to the Analyzer could otherwise result.

Ventilator testing involves multiple connections as shown in Figure 2-5.

High Flow Sensor

Oxygen

Sensor

Figure 2-5. Ventilator Test Connections

Ventilator

Temp./RH Sensor

Fluke Biomedical ACCU LUNG

ede06f.eps

2-10

Using the VT MOBILE

Understanding the Controls and Indicators

Figure 3-1 and Table 3-1 describe the controls and indicators.

VT MOBILEVT MOBILE

GAS FLOW ANALYZERGAS FLOW ANALYZER

F1 F2

ENTER

Back

1122ABCABC

VENTILATOR PARAMETERS

PRESSURE

/VOL

FLOW

WAVEFORM SCREENS

GHIGHI

FLOW

OTHER MEASUREMENTS

PQRSPQRS

FLOW/VOL

TREND

MemoryMemory

Setup

DEFDEF

TIMING

MNOMNO

JKLJKL

PRESSURE

TUVTUV

PRESSURE

SPECIAL FUNCTIONS

ZERO

SENSORS

TEST

VOLUME

WXYZWXYZ

F1 F2

Back

VENTILATOR PARAMETERS

, @_ , @ 1122ABCABC

FLOW/VOL

WAVEFORM SCREENS

OTHER MEASUREMENTS

FLOW/VOL

SPECIAL FUNCTIONS

TREND

TEST

Setup

ENTER

PRESSURE

TUVTUV77PQRSPQRS 99WXYZWXYZ

TIMING

55JKLJKL44GHIGHI 66MNOMNO

VOLUMEFLOW

PRESSURE

ZERO

SENSORS

Chapter 3

MemoryMemory

%RH O

33DEFDEF

ede01f.eps

Figure 3-1. Controls and Indicators

3-1

VT MOBILE

Operators Manual

No. Name Description/Use

Table 3-1. Controls and Indicators

Miniature RS-232 Serial Port

Battery Eliminator Connector

Battery Eliminator Indicator

High-Pressure Connector Connect the High-Pressure Adapter here. The Analyzer makes

Flow and Low-Pressure Connector

Display Screen Shows measurement parameters and statistics (Min, Avg, and

Oxygen Sensor Connector Connect the Oxygen Sensor here. The Analyzer makes O2

Temperature, RH Sensor Connector

Softkeys

F G

Connect the RS-232 cable here (for use with VT for Windows software.)

Connect the battery eliminator here. Use the battery eliminator whenever possible.

Glows green when the battery eliminator is supplying power to the Analyzer. Note that this power source cannot recharge the battery.

high-pressure measurements from -2 to 100 psi.

Insert one of three coded modular connectors here; the Analyzer automatically detects the connector type. The Analyzer use the High-Flow Sensor to measure up to ± 150 lpm, the Low-Flow Sensor to measure up to ± 25 lpm, or the Low-Pressure Adapter to measure from -20 to 120 cmH2O.

Max), waveforms, and setup selections. English only.

measurements from 0 to 100%.

Connect the optional Temperature and Relative Humidity Sensor here.

Use F and G to access selections identified on the screen immediately above these keys.

Memory Key

Help Key

Ventilator Parameters Keys

K L M

Press J to save, view, or delete memory files. A memory file contains data to reconstruct all aspects of a stored screen (reading, statistics, waveform, parameters, etc.)

Press I to access context-sensitive help. If necessary, press B or C to scroll through additional text. Press the previous screen.

Press K parameters. When text entry is required, press K successively to cycle through 1 Æ - Æ @. Press L to cycle through A Æ B Æ C Æ 2, and press M to cycle through D Æ E Æ F Æ 3.

, L, or M to display ventilator measurement

A to return to

3-2

Using the VT MOBILE Understanding the Controls and Indicators

Table 3-1. Controls and Indicators (cont.)

No. Name Description/Use

Waveform Screens Keys

N L O

Other Measurements Keys

K L P

Special Functions Keys

Q R S

Navigation Keys

A B C D

Enter Key E Power Key

Press N, L

For any waveform, press F (Rescale) to optimize the display or press G (Units) to select new units of measurement. When text entry is required, press N successively to cycle through G Æ H Æ I Æ 4. Press L to cycle through J Æ K Æ L Æ 5, and press O to cycle through M Æ N Æ O Æ 6.

Press K to access direct readings and statistics of flow and volume. Press L for readings and statistics of high or low pressure. Repeated presses of P yield readings of O2 %, temperature, and relative humidity. When text entry is required, press K successively to cycle through P Æ Q Æ R Æ S Æ 7. Press L to cycle through T Æ U Æ V Æ 8, and press P to cycle through W Æ X Æ Y Æ Z Æ 9.

Press Q to start new or review old trending data. Press R at any time to initiate the zeroing procedure or, when keypad entry is required, to enter 0. Press S to access barometric pressure and battery readings.

Press

A to exit specific screens (Setup, Memory, Help,

More, etc.) Press B or C to cycle through specific screen

selections (Setup, Memory, More, etc.) or to scroll through

help text. Press Correction Mode, Breath Detect Threshold, Zero Warning, Date, Time, and version numbers.)

Press E to activate a menu selection.

Press and briefly hold this key to power on or power off the Analyzer.

, or O to display specific waveforms.

D to access system settings (Gas Type,

3-3

VT MOBILE

Operators Manual

Screens

Ventilator Parameters Screens

The Analyzer calculates 16 parameters for every breath. You can display all parameters individually or most parameters in groups of four. Parameters update following every breath. Units of measure for breath parameters are fixed. Table 3-2 shows parameters and groupings, along with abbreviations and units of measurement.

Table 3-2. Ventilator Parameters

Parameter Units

Inspiratory and Expiratory Tidal Volume (VT) ml

Expiratory Minute Volume (MV) lpm

Peak Inspiratory Flow (PIF) lpm

Peak Expiratory Flow (PEF) lpm

Peak Inspiratory Pressure (PIP) cmH2O

Positive-End Expiratory Pressure (PEEP) cmH2O

Mean Airway Pressure (MAP) cmH2O

Inspiratory Pause Pressure (IPP) cmH2O

Breath Rate (Rate) bpm

Inspiratory Time (Ti) s

Expiratory Time (Te) s

Inspiratory, Expiratory Time (I:E) Ratio s:s

Oxygen Concentration % O2 Temperature (optional) °C (selectable)

Relative Humidity (optional) % RH

Barometric Pressure mmHg (selectable)

3-4

Using the VT MOBILE Screens

Viewing a Single Parameter

To view single parameters, press K, L, or M repeatedly. If you are already viewing a multi-parameter screen, press G (Single). The following is an example of the PIP single parameter screen:

Viewing a Group of Parameters

From an individual parameter screen, press G (All) to display the related screen of four parameters. The groups are Pressures, Vol/Flow, and Timing. The following is an example of the Pressures multi-parameter screen:

Viewing All Parameters

You can view all 16 parameters on one screen when using the Analyzer connected to a PC running the VT for Windows software.

Oxygen Screen

Press P to access the Oxygen Screen. The sample oxygen screen shown below displays the signal and statistics for the oxygen sensor.

ede26s.bmp

ede27s.bmp

ede28s.bmp

Press F (Clear) to reset the statistics and start a new reading. Press G (Calibrate) to begin the calibration routine for the oxygen sensor; you will

find complete instructions later in this chapter.

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VT MOBILE

Operators Manual

Temperature Screen

Press P as required to access the Temperature Screen (available when the optional Temperature and Relative Humidity Sensor is connected.) The sample temperature screen shown below represents the gas temperature as measured in series with the High-Flow or Low-Flow Sensor.

Relative Humidity Screen

Press P as required to access the Relative Humidity Screen (available when the optional Temperature and Relative Humidity Sensor is connected.) The sample relative humidity screen shown below represents the gas relative humidity as measured in series with the High-Flow or Low-Flow Sensor.

Barometric Pressure Screen

Press S Æ E to access the Barometric Pressure Screen. The Analyzer continuously measures the barometric pressure using an internal sensor. A sample barometric pressure screen follows:

ede29s.bmp

ede30s.bmp

ede31s.bmp

3-6

Waveform Screens

You can access waveform representations of the reading by pressing keys in the WAVEFORM SCREENS section of the keypad. The Analyzer provides Flow, Pressure (high, low, and airway), and Volume waveform screens.

+ 74 hidden pages

Fluke VT Mobile User Manual

Warranty and Product Support

Table of Contents

List of Tables

List of Figures

Introduction

Introducing the VT MOBILE

Operation, Storage, and Maintenance

Features

About This Manual

Preparing for Operation

Unpacking the VT MOBILE

Powering Up

Using the Tilt Bail

Using the Keys

Selecting the Operating Mode

Setting Up

Selecting the Gas Type

Gas Temperature and Relative Humidity

Selecting the Correction Mode

Setting the Breath Detect Threshold

Setting Zero Warn ON or OFF

Setting the Time

Setting the Date

Selecting the Date Format

Setting the Contrast

Checking Version and Serial Numbers

Connecting the Analyzer

High-Flow Connection

Low-Flow Connection

High-Pressure Connection

Low-Pressure Connection

Ventilator Test Connections

Using the VT MOBILE

Understanding the Controls and Indicators

Screens

Ventilator Parameters Screens

Viewing a Single Parameter

Viewing a Group of Parameters

Viewing All Parameters

Oxygen Screen

Temperature Screen

Relative Humidity Screen

Barometric Pressure Screen

Waveform Screens