Fluke VT Plus HF User Manual

VT Plus HF

Gas Flow Analyzer

Operators Manual

PN 2137275
May 2008, Rev. 2, 4/09

© 2008, 2009 Fluke Corporation, All rights reserved. Printed in USA. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

Warranty and Product Support

Fluke Biomedical warrants this instrument against defects in materials and workmanship
for one 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
covers the original purchaser only and is not transferable. The warranty does not apply if
the product has been damaged by accident or misuse or has been serviced or modified by
anyone other than an authorized Fluke Biomedical service facility. NO OTHER
WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE
EXPRESSED OR IMPLIED. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

This warranty covers only serialized products and their accessory items that bear a
distinct serial number tag. Recalibration of instruments is not covered under the warranty

This warranty gives you specific legal rights and you may also have other rights that vary
in different jurisdictions. Since some jurisdictions do not allow the exclusion or limitation
of an implied warranty or of incidental or consequential damages, this limitation of
liability may not apply to you. If any provision of this warranty is held invalid or
unenforceable by a court or other decision-maker of competent jurisdiction, such holding
will not affect the validity or enforceability of any other provision.

07/07

Notices

All Rights Reserved

© Copyright 2008, 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.

Copyright Release

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 [e-mail] or call 1-800- 850-4608 ext
2560 or 1-440-498-2560.

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- 850-4608 ext 2560 or 1-440-498-2560.

Repair and calibration:

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

In the U.S.A.:
Cleveland Calibration Lab
Tel: [phone]
Email: [e-mail]

Everett Calibration Lab
Tel: [phone]
Email: [e-mail]

In Europe, Middle East, and Africa:
Eindhoven Calibration Lab
Tel: [phone]
Email: [e-mail]

In Asia:
Everett Calibration Lab
Tel: [phone]
Email: mailto:[e-mail]

, or

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 PLUS HF Gas Flow Analyzer is manufactured in Everett, Washington by Fluke Biomedical, 6920 Seaway Blvd.,
Everett, WA, U.S

Table of Contents

Chapter Title Page

1 Introduction and Specifications......................................................... 1-1

Introduction........................................................................................................ 1-3

Key Features ...................................................................................................... 1-3

Unpacking and Inspection.................................................................................. 1-3

General Safety Considerations........................................................................... 1-4

Symbols ......................................................................................................... 1-4

Warnings and Cautions.................................................................................. 1-4

Instrument Familiarity ....................................................................................... 1-5

Front Panel..................................................................................................... 1-6

Right Panel .................................................................................................... 1-6

Rear Panel...................................................................................................... 1-7

Left Panel....................................................................................................... 1-7

Front Panel Details ........................................................................................ 1-8

Specifications..................................................................................................... 1-10

General Specifications................................................................................... 1-10

Performance Specifications ........................................................................... 1-11

Breath Parameter Accuracy Specifications ................................................... 1-12

Accessories ........................................................................................................ 1-14

2 Connection and Setup ........................................................................ 2-1

Connecting the Analyzer ................................................................................... 2-3

Pneumatic Connections ................................................................................. 2-3

High Flow (Inlet and Exhaust).................................................................. 2-3

Low Flow (Inlet and Exhaust)................................................................... 2-3

High Pressure (+ and -) ............................................................................. 2-3

Low Pressure (+ and -).............................................................................. 2-4

Test System Setup ......................................................................................... 2-4

Bi-directional Flow Mode ......................................................................... 2-4

Unidirectional Flow Mode ........................................................................ 2-5

Printer Cable Attachment .............................................................................. 2-6

Using the Setup Screen ...................................................................................... 2-7

Setting Testing Parameters ................................................................................ 2-7

Gas Settings................................................................................................... 2-8

Gas Type ................................................................................................... 2-8

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Gas Temperature ....................................................................................... 2-9

Ambient Temperature ............................................................................... 2-9

Relative Humidity ..................................................................................... 2-9

Correction Mode............................................................................................ 2-10

Barometric Pressure....................................................................................... 2-10

Breath Detection............................................................................................ 2-11

Inspiratory/Expiratory Tidal Volumes........................................................... 2-12

Zero Mode ..................................................................................................... 2-12

Setting Analyzer Operating Parameters............................................................. 2-13

Time............................................................................................................... 2-13

Date ............................................................................................................... 2-14

Date Format ................................................................................................... 2-14

Demo Data..................................................................................................... 2-14

Filtering ......................................................................................................... 2-15

Display Calibration Date on Startup Screen.................................................. 2-15

Serial Mode ................................................................................................... 2-15

Printer Options............................................................................................... 2-16

Printer Type............................................................................................... 2-16

Graphics .................................................................................................... 2-17

Audio Levels ................................................................................................. 2-17

General ...................................................................................................... 2-17

Keypad ...................................................................................................... 2-17

Errors......................................................................................................... 2-18

Restore Defaults ............................................................................................ 2-18

Utilities .............................................................................................................. 2-20

Oxygen Sensor Calibration............................................................................ 2-20

System Diagnostics ....................................................................................... 2-21

Linearization.................................................................................................. 2-21

Unlock Calibration ........................................................................................ 2-22

Information ........................................................................................................ 2-22

3 Operation ............................................................................................. 3-1

Measured Signals............................................................................................... 3-3

High Flow...................................................................................................... 3-3

Low Flow ...................................................................................................... 3-3

Airway Pressure............................................................................................. 3-3

Low Pressure ................................................................................................. 3-3

Barometric Pressure....................................................................................... 3-4

High-Pressure Measurement.......................................................................... 3-4

Oxygen Concentration................................................................................... 3-4

Calculated Breath Parameters........................................................................ 3-4

Screen Objects ................................................................................................... 3-6

Title Bar......................................................................................................... 3-7

Data Plots ...................................................................................................... 3-7

Breath Parameters.......................................................................................... 3-7

Breath Detection Icons .................................................................................. 3-8

Instantaneous Numeric Data.......................................................................... 3-9

Statistics......................................................................................................... 3-9

Selecting Breath Parameters .............................................................................. 3-10

Flow Screens...................................................................................................... 3-11

High-Flow Screen.......................................................................................... 3-11

Low-Flow Screen .......................................................................................... 3-12

Pressure Screens ................................................................................................ 3-13

High-Pressure Screen .................................................................................... 3-13

ii

Contents (continued)

Low Pressure Screen ..................................................................................... 3-14

Airway Pressure Screen................................................................................. 3-15

Volume Screen................................................................................................... 3-16

Oxygen Screen................................................................................................... 3-17

Full Breath Parameters Test Screen................................................................... 3-18

Monitor Screen .................................................................................................. 3-19

Units of Measure................................................................................................ 3-20

Special Functions............................................................................................... 3-21

Trend Test...................................................................................................... 3-21

Leak Test ....................................................................................................... 3-24

Stacked Volume Test..................................................................................... 3-27

RT200 Emulation Mode ................................................................................ 3-28

Assist Test ..................................................................................................... 3-31

High Frequency Oscillator Mode .................................................................. 3-32

4 Remote Operation ............................................................................... 4-1

Getting Started ................................................................................................... 4-3

System Requirements .................................................................................... 4-3

Connecting to the Analyzer ........................................................................... 4-3

Installing the Software................................................................................... 4-3

Starting the Software ..................................................................................... 4-4

Overview of VT for Windows PC Software...................................................... 4-5

Menu Bar ........................................................................................................... 4-6

Toolbar............................................................................................................... 4-8

Main Screens and Tests ..................................................................................... 4-9

Monitor Screen .............................................................................................. 4-9

Single Plot Screen.......................................................................................... 4-10

Loop Screen................................................................................................... 4-11

Full Test Screen............................................................................................. 4-12

Trend Test...................................................................................................... 4-12

Leak-Test....................................................................................................... 4-16

Stacked Volume Test Screen......................................................................... 4-18

Serial Communications...................................................................................... 4-20

Selecting COM Port ...................................................................................... 4-20

Selecting the Serial Communications Mode ................................................. 4-20

Data and File Handling ...................................................................................... 4-21

Events ............................................................................................................ 4-21

Opening and Closing Data Files.................................................................... 4-22

File Control Interface .................................................................................... 4-23

Playback Controls ..................................................................................... 4-24

Event Markers ........................................................................................... 4-25

File Information Panel............................................................................... 4-26

Event Panel ............................................................................................... 4-26

Generating Signal (.sig) Files ........................................................................ 4-26

Generating Parameter (.par) Files.................................................................. 4-26

Report Printing................................................................................................... 4-27

Operating System Loading ................................................................................ 4-27

Plots ................................................................................................................... 4-28

Automatically Re-scaling Plots ..................................................................... 4-28

Manually Re-scaling Plots............................................................................. 4-28

Signal Selection ............................................................................................. 4-29

Zeroing............................................................................................................... 4-30

Manual Zeroing ............................................................................................. 4-30

Automatic Zeroing......................................................................................... 4-30

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VT Plus HF

Operators Manual

Other Setup Functions ....................................................................................... 4-31

Breath Detect ................................................................................................. 4-31

Breath Detect Threshold................................................................................ 4-31

Gas Settings................................................................................................... 4-31

Barometric Pressure....................................................................................... 4-34

5 Maintenance, Service, and Calibration.............................................. 5-1

Maintenance....................................................................................................... 5-3

Avoiding Damage.......................................................................................... 5-3

Cleaning......................................................................................................... 5-3

Oxygen Sensor Replacement ............................................................................. 5-3

Fuse Replacement .............................................................................................. 5-4

Service and Calibration...................................................................................... 5-5

Appendices

A Gas Analyzer Tutorial ................................................................................. A-1

B Error Messages............................................................................................ B-1

C Troubleshooting .......................................................................................... C-1

iv

List of Tables

Table Title Page

1-1. Symbols.................................................................................................................. 1-4

1-2. Front Panel Components ........................................................................................ 1-6

1-3. Right Panel Components........................................................................................ 1-6

1-4. Back Panel Components ........................................................................................ 1-7

1-5. Left Panel Components .......................................................................................... 1-7

1-6. Front Panel Functions ............................................................................................ 1-8

1-7. Breath Parameter Accuracy Specifications ............................................................ 1-13

1-8. Standard Accessories ............................................................................................. 1-14

1-9. Optional Accessories.............................................................................................. 1-15

2-1. Gas Type Values .................................................................................................... 2-8

2-2. Breath Detection Options....................................................................................... 2-11

2-3. Serial Port Options ................................................................................................. 2-15

2-4. Factory Defaults ..................................................................................................... 2-18

3-1. Parameters Calculated by the Analyzer ................................................................. 3-5

3-2. Display Components .............................................................................................. 3-6

3-3. Breath Detection Icons........................................................................................... 3-8

3-4. Available Units of Measure.................................................................................... 3-20

3-5. Available Conversion Factors ................................................................................ 3-21

3-6. Supported RT200 Functions................................................................................... 3-29

4-1. Elements of the VT for Windows Interface ........................................................... 4-6

4-2. Menu Bar Options .................................................................................................. 4-7

4-3. Setup Submenu Options......................................................................................... 4-7

4-4. Toolbar Buttons...................................................................................................... 4-8

4-5. Data Types ............................................................................................................. 4-21

4-6. Generated File Types ............................................................................................. 4-21

4-7. Playback Controls .................................................................................................. 4-24

B-1. Error Messages....................................................................................................... B-1

C-1. Troubleshooting ..................................................................................................... C-1

v

VT Plus HF

Operators Manual

vi

List of Figures

Figure Title Page

1-1. Front and Right Analyzer Panels ........................................................................... 1-5

1-2. Rear and Left Analyzer Panels............................................................................... 1-7

1-3. Analyzer Front Panel.............................................................................................. 1-8

2-1. Connecting the Analyzer in a Bi-Directional Flow Mode ..................................... 2-4

2-2. Connecting the Analyzer to the Inspiratory Limb of the Breathing Circuit........... 2-5

2-3. Connecting the Analyzer to the Expiratory Limb of the Breathing Circuit ........... 2-5

3-1. Information Shown on Analyzer Display............................................................... 3-6

3-2. The Assist Test....................................................................................................... 3-31

3-3. Ventilator Breathing Circuit Setup for Bi-Directional Measurements................... 3-31

4-1. VT for Windows PC software Interface................................................................. 4-5

4-2. VT for Windows Menu Bar ................................................................................... 4-6

4-3. VT for Windows Toolbar....................................................................................... 4-8

4-4. Monitor Screen....................................................................................................... 4-9

4-5. Single Plot Screen .................................................................................................. 4-10

4-6. Loop Screen ........................................................................................................... 4-11

4-7. Full Test Screen...................................................................................................... 4-12

4-8. Trend Test: Setup Screen ....................................................................................... 4-13

4-9. Trend Test Screen: Testing Underway................................................................... 4-14

4-10. Trend Test Screen: Final Values Displayed ........................................................... 4-15

4-11. Leak Test: Setup Screen......................................................................................... 4-16

4-12. Leak Test Screen: Testing Underway .................................................................... 4-17

4-13. Stacked Volume Test: Setup Screen ...................................................................... 4-18

4-14. Stacked Volume Screen: Testing Underway.......................................................... 4-19

4-15. File Menu ............................................................................................................... 4-22

4-16. File Control Interface ............................................................................................. 4-23

4-17. File Information Panel............................................................................................ 4-26

5-1. Fuse Compartment ................................................................................................. 5-4

A-1. Circuit Connection for the Analyzer in Bi-directional Mode................................. A-6

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VT Plus HF

Operators Manual

viii

Chapter 1

Introduction and Specifications

Title Page

Introduction........................................................................................................ 1-3

Key Features ...................................................................................................... 1-3

Unpacking and Inspection.................................................................................. 1-3

General Safety Considerations........................................................................... 1-4

Symbols ......................................................................................................... 1-4

Warnings and Cautions.................................................................................. 1-4

Instrument Familiarity ....................................................................................... 1-5

Front Panel..................................................................................................... 1-6

Right Panel .................................................................................................... 1-6

Rear Panel...................................................................................................... 1-7

Left Panel....................................................................................................... 1-7

Front Panel Details ........................................................................................ 1-8

Specifications..................................................................................................... 1-10

General Specifications................................................................................... 1-10

Performance Specifications ........................................................................... 1-11

Breath Parameter Accuracy Specifications ................................................... 1-12

Accessories ........................................................................................................ 1-14

1-1

VT Plus HF

Operators Manual

1-2

Introduction and Specifications

Introduction 1

Introduction

The VT Plus HF Gas Flow Analyzer, referred to hereafter as the Analyzer, is a general­purpose, gas flow analyzer with special modes for testing mechanical patient ventilators.
The Analyzer measures bidirectional flow in both high and low ranges, as well as high­and low-pressure ranges. Users control the unit using the command system or a special
control mode that uses RT200-style commands. Multiple special-function tests allow
efficient troubleshooting.

The Analyzer can measure either high- or low-flow and pressure, eliminating the need for
gauges and flow meters. It measures 21 ventilator parameters and can display all of them
on one screen. Results can be printed directly from the unit or from Windows-compatible
software on a PC. The Analyzer also has onboard graphing capability and shows the
minimum, maximum, average, and absolute measurement for all parameters.

This manual provides a description of the Analyzer and its applications. It should be used
as a guide when using the instrument to analyze a ventilator and test lung.

Key Features

• Bi-directional flow, low- and high-pressure, volume, and oxygen concentration, and

pressure measurements

• Very high-frequency measurement capability – up to 900 BPM (15 Hz)

• RS232 and printer ports

• Included Windows-compatible graphics software

• Minimum, maximum, average, absolute, and graph for all parameters

• All 21ventilator parameters displayed on one screen simultaneously

• Operation by user-friendly command mode or RT200 command mode

• Operation with a variety of precision test lungs available from Fluke Biomedical to

complete a fully NIST-traceable ventilator test

• Tests the leak rate of a sealed vessel or test lung

• Tests whether a predetermined parameter deviates from limits set by the user

• Useful for pre-purchase evaluations of ventilators, incoming and routine performance

verification, troubleshooting clinical problems, and teaching principles of mechanical
ventilation

Unpacking and Inspection

Use the following checklist when unpacking the Analyzer. There are no special
unpacking instructions, but be careful not to damage the instrument when unpacking it.

• Inspect the shipping carton for damage. If the shipping carton is damaged, carefully

continue unpacking the instrument and note any dents and scratches on the Analyzer.
Save the damaged shipping carton and packing material for the carrier’s inspection.

• If there is no shipping damage, continue removing the Analyzer from the shipping

case. Save the box and packing materials.

Note

This box contains specifically designed inserts to ensure safe shipment of
the Analyzer. Please save these for return of the unit for service or
calibration.

1-3

VT Plus HF

Operators Manual

General Safety Considerations

Symbols

• Perform a visual inspection to ensure that the Analyzer is intact and if there is any

physical damage, such as bent or broken parts, dents, or scratches. If the Analyzer
has been damaged, call the Fluke Biomedical Service Center immediately. If the
Analyzer be returned to Fluke for service, follow the procedure given under
Maintenance, Service, and Calibration: Packing Instructions.

• After unpacking the Analyzer, check to see if all of the standard accessories listed

under Accessories have been included with the Analyzer. If anything is missing,
contact the Fluke Biomedical Service Center.

Read the Users Manual before operating the Analyzer.

Table 1-1 describes the symbols associated with the Analyzer.

Table 1-1. Symbols

Symbol Description

X Hazardous voltage
W Important information; refer to manual

ΠConforms to UL Std 3101-1; certified to Can/USA Std C22.2 No. 1010.1

P Conforms to European Union directives

~

Do not dispose of this product as unsorted municipal waste. Go to Fluke’s
website for recycling information.

Hg Contains mercury. Dispose properly.

Warnings and Cautions

A Warning identifies hazardous conditions and actions that could cause bodily harm or
death.

A Caution identifies conditions and actions that could damage the Analyzer, the
equipment under test, or cause permanent loss of data.

To avoid possible electrical shock or personal injury, follow
these guidelines:

• Use this Analyzer only in the manner specified by the

manufacturer.

• Do not use the product if it operates abnormally.

XW Warning

1-4

• Plug the main power cord only into a power outlet that has a

protective earth contact to connect the chassis of the Analyzer to
ground.

• Do not use extension cords without earth ground, or a hazardous

condition may result.

• Turn off the Analyzer and disconnect its power cord before

opening the case or performing any service procedures.

Introduction and Specifications

Instrument Familiarity 1

W Caution

To avoid damage to the Analyzer or adverse affects on its
performance, follow these guidelines:

• Do not expose the system to temperature extremes.

Ambient temperatures should remain between 10 °C and
40 °C. System performance may be adversely affected if
temperatures fluctuate above or below this range.

• Clean the Analyzer only by wiping it down with a clean, lint-

free cloth dampened with a mild detergent solution. A
solution of 70 % isopropyl alcohol may be used to remove
stains and clean the system. No other solvents are
recommended. Do not spray liquid directly on or immerse
the unit.

Instrument Familiarity

Figure 1-1 shows the top and right panels of the Analyzer.

3

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Figure 1-1. Front and Right Analyzer Panels

1-5

VT Plus HF

Operators Manual

Front Panel

Right Panel

The components of the front panel are listed in Table 1-2. See Front Panel Details for
detailed descriptions of front panel components.

Table 1-2. Front Panel Components

Label Description

A LCD Display with CFL backlight

B Contrast, Pause/resume, print, and help keys

C Soft keys

D Test Mode keys

The components of the right panel of the Analyzer are described in Table 1-3.

Table 1-3. Right Panel Components

Label Description

E Low Pressure (+) Gas Or Fluid Port

F Low Pressure (-) Dry Gas Only Port

G High Pressure (+) Gas Or Fluid Port

H High Pressure (-) Dry Gas Only Port

I Low Flow Inlet

J High Flow And Oxygen Inlet

Figure 1-2 shows the rear and left panels of the Analyzer.

1-6

Introduction and Specifications

1

Instrument Familiarity 1

Rear Panel

The components of the back panel are listed in Table 1-4.

Label Description

2

3

4

5

Figure 1-2. Rear and Left Analyzer Panels

Table 1-4. Back Panel Components

A RS232 Serial Port

B Parallel Printer Port

C Power Switch

D Power Cord Input

E Oxygen Sensor Access

7

6

fec121.eps

Left Panel

The components of the left panel are listed in Table 1-5.

Table 1-5. Left Panel Components

Label Description

F High-Flow Exhaust Port

G Low-Flow Exhaust Port

1-7

VT Plus HF

Operators Manual

Front Panel Details

Figure 1-3 shows details of the Analyzer front panel, and Table 1-6 describes the various
keys, their icons, and functions.

VT PLUS HF

GAS FLOW ANALYZER

TEST MODES

1-8

Figure 1-3. Analyzer Front Panel

Table 1-6. Front Panel Functions

Icon Name Function

E

F

Contrast Adjustment This key adjusts the screen contrast to match the user’s

preference. Each time the key is pressed, the screen becomes
lighter. When the minimum contrast is reached, the screen is set
to the maximum contrast and the screen can be made lighter
until the preferred setting is achieved.

Pause/Resume This key pauses the plots and numeric data on the screen to

allow further examination of the data, or for transcription of the
data by the user. After the screen has been paused, a second
press of the Pause/Resume key resumes the plot. Note: The
Analyzer stops sampling the transducers while in the Pause
mode.

fec011.eps

Introduction and Specifications

Table 1-6. Functions (cont.)

Icon Name Function

Instrument Familiarity 1

G

H

D

:

;

<

Print This key prints the current data to the printer. The mode and

format of the printout is set using the printer options function
selected under the setup menu.

Help This key displays help for any screen. A brief description of the

screen and of the options available from that screen is provided
when help is pressed.

Soft Keys These are four programmable keys located directly below the

display. Each display mode has unique options assigned to its
soft keys.

FLOW/0 Key This key selects the flow mode on the Analyzer. The flow mode

displays signal, instantaneous numeric value and statistical data
for the high or low flow signal. This key is also the 0 key for
numeric data entry.

PRESSURE/1 Key This key selects the pressure mode. The pressure mode

displays the signal, instantaneous numeric value, and statistical
data for the high, low, or airway pressure signal. This key is also
the 1 key for numeric data entry.

VOLUME/2 Key This key selects the volume mode. The volume mode displays

the signal, instantaneous numeric value, and statistical data for
the volume signal. This key is also the 2 key for numeric data
entry.

=

>
?

@

O2/3 Key This key selects the oxygen mode. The oxygen mode displays

the signal, instantaneous numeric value and statistical data for
the oxygen signal. This key is also the 3 key for numeric data
entry.

MORE/4 Key This key selects other tests such as the Leak test and the Trend

test. This key is also the 4 key for numeric data entry.

FULL/5 Key This key selects the full breath parameters mode. The full mode

displays all of the breath parameters calculated by the Analyzer
following every breath. Note that one of the breath-detect
settings must be enabled to observe volume signals or data.
Refer to System Setup for breath detection settings. This key is
also the 5 key for numeric data entry.

MONITOR/6 Key This key selects the monitor mode. The monitor mode displays

the signal and instantaneous value for three of the signals
measured by the Analyzer. Alternatively, the lower of the three
plots may be replaced by selected breath parameters. The user
can select the signals and/or parameters that are displayed. This
key is also the 6 key for numeric data entry.

1-9

VT Plus HF

Operators Manual

Table 1-6. Functions (cont.)

Icon Name Function

A

B

C

ZERO/7 Key This key initiates the zero function in the Analyzer. All of the

pressure and differential pressure (flow) sensors in the Analyzer
must be periodically zeroed or calibrated to a zero reference.
When zero is selected, the device measures the zero value of
the selected signal for flow measuring. The Analyzer can be set
to periodically call of the zero function. Refer to System Setup
for Zero Mode Descriptions. This key is also the 7 key for
numeric data entry.

SETUP/8 Key This key accesses the Analyzer configuration and setup

screens. When this key is pressed, a menu is displayed. The
soft keys are used to navigate the menu. From this menu, other
sub-menus are accessible to adjust the various configuration
settings. The details of this menu and its sub-menus are
described later. This key is also the 8 key for numeric data entry.

PARAMETERS/9 Key This key selects which of the breath parameters are displayed in

the various modes. Each mode screen has space to display 4 of
the breath parameters. Using the parameters function, the four
breath parameters can be selected. Note that if 4 parameters
are already selected, then no more can be selected until one of
the previously selected parameters is cleared. Also note that the
parameters that are selected only apply to the screen that the
Analyzer was in when the parameters key was pressed. This
key is also the 9 key for numeric data entry.

Specifications

The following are general, performance, breath parameter accuracy specifications for the
Analyzer.

General Specifications

Display ................................................... 320 x 240 LCD with CFL backlight

Viewing Area ......................................... 3 in x 4 in (10.1 cm x 8.2 cm) Blue on white background

Operational Modes ............................... Manual mode for simple tests or troubleshooting; computer-control

Output Ports.......................................... RS232 serial port and parallel-printer port

Operating Environmental Conditions

Temperature Range........ ................ 10 °C to 40 °C

Ambient Humidity................... ......... 0 - 80 % non-condensing to 31 °C, decreasing to 50 % at 40 °C

Barometric Pressure......................... 8 to 18 psia

Vibration .......................................... Devices intended to be used on tabletop or other stable surface.

Storage Environmental Conditions

Temperature Range ........................-25 to 50 °C

Humidity........................................... 0 to 95 % non-condensing °C

Power Requirements

Maximum Over-voltage ...................264 V ac

Input Voltage Range .......................100 to 240 V ac

Input Frequency Range ................. 50/60 Hz

mode, using RS232 serial port for special applications; use of Analyzer
with VT for Windows PC software for recording graphs and logging
data to a computer

1-10

Introduction and Specifications

Power Consumption ....................... <132 VA

Fuse Rating .................................... 0.5 A, Slo-Blo

Specifications 1

Performance Specifications

Low-Pressure Port

Maximum Applied Pressure............. 60 psi

Operating Pressure ......................... (Differential) ±500 mmHg (±10 psi)

Span Accuracy ................................ ±0.80 % of reading or ±1.5 mmHg, whichever is greater

Frequency Response ...................... >10 Hz

Resolution........................................ 0.1 mmHg

Sample Rate ...................................100 Hz

(Common-mode) 30 psi

Note

Fluid pressure may be applied to the positive port; however, fluids should
be kept from entering the pressure port by using a suitable length of
connection tubing.

High-Pressure Port

Maximum Applied Pressure............ 150 psi

Operating Pressure ........................ ±100 psi

Span Accuracy ............................... ±1 % of reading or ±0.3 psig, whichever is greater

Frequency Response ..................... >10 Hz

Resolution....................................... 0.1 psi

Sample Rate................................... 100 Hz

Fluid pressure may be applied to the positive port; however, fluids should
be kept from entering the pressure port by using a suitable length of
connection tubing.

Airway Pressure

Maximum Applied Pressure............. 20 psi

Operating Pressure ........................ ±120 cmH

Span Accuracy ............................... ±0.75 % of reading or r 0.5 cmH

Frequency Response ..................... >25 Hz or t10-90 <40 ms, whichever is greater

Resolution....................................... 0.1 cmH

Sample rate .................................... 100 Hz

Airway pressure is internally tapped off the proximal flow sensor port,
which is the port closest to the exhaust port on the Analyzer.

Continuous Flow

Low Flow ............................................... ±(2 % of reading and 1 % of range)

High Flow............................................... ±(2 % of reading and 1 % of range)

Volumetric Flow

High-Flow Port

Maximum Flow Rate........................ (absolute value) 500 lpm

Operating Flow Range.................... ±300 lpm

Accuracy......................................... ±2.0 % of range

Resolution....................................... 0.01 lpm

Note

2

O

2

Note

O

O, whichever is greater

2

1-11

VT Plus HF

Operators Manual

Frequency Response. .................... >25 Hz or t10-90 <40 ms, whichever is greater

Sample Rate................................... 100 Hz

Dynamic Resistance....................... <2.00 cmH

Low-flow Dropout............................ 25 lpm

Breath Detect Threshold................. (user settable) 2.0 lpm

Volume Range................................ >±60 l

O @ 60 lpm

2

Notes

• Tidal Volume Accuracy ±3 % of reading or ±10 ml, whichever is

greater

• Volume Accuracy tested to 7 liters.

• Flow accuracy is specified for dry air or oxygen.

• Do not use with humidified gases.

Low Flow Port

Maximum Flow Rate........................(absolute value) 50 lpm

Operating Flow Range.................... ±25 lpm

Accuracy......................................... ±1.0 % of range

Resolution....................................... 0.01 lpm flow >1 lpm; 0.001 lpm flow <1 lpm

Frequency Response ...................... >25 Hz or t10-90 <40 ms, whichever is greater

Sample Rate................................... 100 Hz

Dynamic Resistance....................... <2.5 cmH

Low-flow Dropout............................ 0.01 lpm

Breath Detect Threshold................. (user settable) 0.50 lpm

Volume Range ............................... >±60 l

O @ 5 lpm

2

Note

• Tidal Volume Accuracy ± 3 % of reading or ±5 ml, whichever is

greater

• Volume Accuracy tested to 1 liter

• Flow accuracy is specified for dry air or oxygen.

• Do not use with humidified gases.

• Below 0.25 lpm, measurement accuracy is obtained by allowing the

Analyzer to fully warm up, and manually zeroing before reading or
documenting a measurement.

Breath Parameter Accuracy Specifications

Breath parameter accuracy specifications are listed in Table 1-7.

Note

If a choice of readings is indicated by an “or”, choose whichever is
greater; for example, 3 % or 250 ml.

1-12

Introduction and Specifications

Table 1-7. Breath Parameter Accuracy Specifications

Parameter Resolution Range Accuracy

Specifications 1

Inspiratory and
Expiratory Tidal Volume

0.1 ml As specified in
high/low-flow spec

As specified in

high/low-flow spec

Minute Volume 0.001 lpm 0-60 l 3 %

Breath Rate 0.1 bpm 0.5 – 150 bpm 1 %

Inspiratory to Expiratory

0.01 1:200 to 200:1 2 % or .1

Time Ratio (I:E Ratio)

Peak Inspiratory

0.1 cmH2O ±120 cmH2O ±3 % or 1 cmH2O

Pressure

Inspiratory Pause

0.1 cmH2O ±120 cmH2O ±3 % or 1 cmH2O

Pressure

Mean Airway Pressure 0.1 cmH2O ±80 cmH2O ±3 % or 0.5 cmH2O

Positive End-expiratory

0.1 cmH2O -5 to 40 cmH2O ±3 % or 0.5 cmH2O

Pressure (PEEP)

Lung Compliance1 0.1 ml/cmH2O 0 - 150 ml/cmH2O ±5 % or 5 ml/cmH2O

Inspiratory Time 0.01 sec 0 - 60 sec 0.5 % or 0.02 sec

Inspiratory Hold Time 0.01 sec 0 - 60 sec 1 % or 0.1 sec

Expiratory Time 0.01 sec 0 - 90 sec 0.5 % or 0.01 sec

Expiratory Hold Time 0.01 sec 0 - 90 sec 1 % or 0.1 sec

Peak Expiratory Flow 0.01 lpm 0 - 300 lpm 3 % or 2 lpm

Peak Inspiratory Flow 0.01 lpm 0 - 300 lpm 3 % or 2 lpm

Flow Bias2 0.01 lpm 0 - 30 lpm 2 % or 0.5 lpm

1

Inspiratory pause time >0.5 sec

2

Expiratory pause time >0.5 sec

1-13

VT Plus HF

Operators Manual

Accessories

Operators manual 2137275

VT for Windows PC software 2392054

Standard bi-directional RS232 serial cable 2238659

Tilt stand 2133387

Table 1-8 lists standard accessories provided with the Analyzer. Table 1-9 lists optional
accessories.

Table 1-8. Standard Accessories

Item Part Number

Power cable

US
Schuko
UK
Australia

Accessory kit containing the following items: 2131367

One bacterial filter for external connection to the flow ports 2133712

One adapter, DISS O2 nut and nipple with ¼ in ID hose barb 2391777

4’ Tubing 1/8” ID clear w/blue stripe 2391848

Two 22 mm ID x 22 mm ID tubing adapters 2133305

Two 22 mm OD x 22 mm OD tubing adapters 2133291

Two tapered 15 mm OD x 22 mm OD tubing adapters 2133269

Two tapered 15 mm OD x 15 mm OD tubing adapters 2133278

Two tapered 15 mm ID x 15 mm ID tubing adapters 2133284

Two narrow bore tubing adapters 2133322

Two flexible 15 mm ID x 22 mm ID tubing adapters 2133310

Two 1/4" NPT male to 1/8" ID tubing barb fitting (Nylon) 2133240

2238562
769422
2238570
658641

1-14

Two 1/4" NPT male to 1/16" ID to bulkhead connection 2133202

Two luer to barb fittings 2213679

Two replacement fuses 0.5 A slow-blow 2133932

One DISS Handtight Nut/Nipple to 1/4” ID hose barb adapter 2216329

Certificate of Calibration – Data Sheet NA

Introduction and Specifications

Table 1-9. Optional Accessories

Item Part Number

Soft vinyl carrying case 2222822

Hard-sided protective carrying case 2248587

Soft-sided carrying case for ACCU-LUNG 2397628

Accessories 1

Graphics Printer

110 V Citizen IDP3110
220 V Citizen IDP3110

D25 male to Centronics parallel cable 2238072

ACCU-LUNG Lung Simulator with Soft-sided
carrying case (2397628)

2248762
2719653

2387318

1-15

VT Plus HF

Operators Manual

1-16 2-1

Chapter 2

Connection and Setup

Title Page

Connecting the Analyzer ................................................................................... 2-3

Pneumatic Connections ................................................................................. 2-3

High Flow (Inlet and Exhaust).................................................................. 2-3

Low Flow (Inlet and Exhaust)................................................................... 2-3

High Pressure (+ and -) ............................................................................. 2-3

Low Pressure (+ and -).............................................................................. 2-4

Test System Setup ......................................................................................... 2-4

Bi-directional Flow Mode ......................................................................... 2-4

Unidirectional Flow Mode ........................................................................ 2-5

Printer Cable Attachment .............................................................................. 2-6

Using the Setup Screen ...................................................................................... 2-7

Setting Testing Parameters ................................................................................ 2-7

Gas Settings................................................................................................... 2-8

Gas Type ................................................................................................... 2-8

Gas Temperature ....................................................................................... 2-9

Ambient Temperature ............................................................................... 2-9

Relative Humidity ..................................................................................... 2-9

Correction Mode............................................................................................ 2-10

Barometric Pressure....................................................................................... 2-10

Breath Detection............................................................................................ 2-11

Inspiratory/Expiratory Tidal Volumes........................................................... 2-12

Zero Mode ..................................................................................................... 2-12

Setting Analyzer Operating Parameters............................................................. 2-13

Time............................................................................................................... 2-13

Date ............................................................................................................... 2-14

Date Format ................................................................................................... 2-14

Demo Data..................................................................................................... 2-14

Filtering ......................................................................................................... 2-15

Display Calibration Date on Startup Screen.................................................. 2-15

Serial Mode ................................................................................................... 2-15

Printer Options............................................................................................... 2-16

Printer Type............................................................................................... 2-16

Graphics .................................................................................................... 2-17

Audio Levels ................................................................................................. 2-17

General ...................................................................................................... 2-17

VT Plus HF

Operators Manual

Keypad ...................................................................................................... 2-17

Errors......................................................................................................... 2-18

Restore Defaults ............................................................................................ 2-18

Utilities .............................................................................................................. 2-20

Oxygen Sensor Calibration............................................................................ 2-20

System Diagnostics ....................................................................................... 2-21

Linearization.................................................................................................. 2-21

Unlock Calibration ........................................................................................ 2-22

Information ........................................................................................................ 2-22

2-2