VT650/VT900 Gas Flow Analyzer

Users Manual


FBC - 0099
October 2017, Rev. 1
©2017 Fluke Corporation. All rights reserved. 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 OR two
years if at the end of your first year you send the instrument to a Fluke Biomedical service center for calibration. You will be charged our
customary fee for such calibration. 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.
7/07
Notices
All Rights Reserved
 Copyright 2017, 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 techservices@flukebiomedical.com or call 1-800- 850-4608 or
1-440-248-9300 (Europe +31-40-2965314).

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.

Returns and Repairs

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 1-440-498-2560.
Repair and calibration:
To find the nearest service center, go to www.flukebiomedical.com/service or
In the U.S.A. and Asia: In Europe, Middle East, and Africa:
Cleveland Calibration Lab Eindhoven Calibration Lab
Tel: 1-800-850-4608 x2564 Tel: +31-40-2675300
Email: globalcal@flukebiomedical.com Email: ServiceDesk@fluke.com
To ensure the accuracy of the Product is maintained at a high level, Fluke Biomedical recommends the product be calibrated at least
once every 12 months. Calibration must be done by qualified personnel. Contact your local Fluke Biomedical representative for
calibration.

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 VT650/VT900 Gas Flow Analyzer is manufactured at Fluke Biomedical, 6920 Seaway Blvd., Everett, WA, U.S.A.
 Table of Contents

Title Page

Introduction .................................................................................................... 1
Key Features .................................................................................................. 1
Safety Information .......................................................................................... 2
Unpacking and Inspection .............................................................................. 5
Accessories .................................................................................................... 6
The Analyzer .................................................................................................. 8
Power On the Analyzer ......................................................................... 10
Analyzer Connections ........................................................................... 12
Airway Flow (Inlet and Exhaust) .................................................... 12
Ultra-Low Flow + and - (VT900) .................................................... 13
High Pressure ............................................................................... 13
Low Pressure (+ and -) .................................................................. 14
Ultra-Low Pressure (VT900 only) .................................................. 14
Test Setup .................................................................................................... 15
Bi-directional Flow Mode ....................................................................... 15

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Users Manual

Unidirectional Flow Mode ...................................................................... 16

Inspiratory Flow Connections ........................................................ 16
Expiratory Test Connections ......................................................... 17
Operations .................................................................................................... 18
Measured Signals ................................................................................. 18
Airway Flow ................................................................................... 19
Airway Pressure ............................................................................ 19
Airway Temperature and Humidity ................................................ 19
High Pressure ................................................................................ 19
Low Pressure ................................................................................ 20
Ultra-Low Pressure (VT900) .......................................................... 20
Ultra-Low Flow (VT900) ................................................................ 20
Barometric Pressure ...................................................................... 20
Oxygen Concentration ................................................................... 21
Calculated Breath Parameters ...................................................... 21
Excel Add-in .......................................................................................... 21
Measurements ...................................................................................... 22
Make a Measurement .................................................................... 22
Save a Measurement .................................................................... 22
Main Menu Functions ............................................................................ 24
Profiles Menu ................................................................................ 24
Setup Menu ................................................................................... 25
Units .............................................................................................. 31
Special Tests Menu ....................................................................... 32
Calibrate Oxygen ........................................................................... 33
Customize Breath Views ............................................................... 34

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 Contents (continued)

Memory Menu ............................................................................... 34

Test ID ........................................................................................... 34
Maintenance, Service and Calibration ......................................................... 35
Cleaning ................................................................................................ 35
Oxygen Sensor Replacement ............................................................... 36
Battery Status ....................................................................................... 36
Battery Replacement ............................................................................ 37
Replaceable Parts ................................................................................. 38
Service and Calibration ......................................................................... 38
Specifications ............................................................................................... 39
Pressure ................................................................................................ 40
Flow ...................................................................................................... 41

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Users Manual

iv
Introduction Key Features
The VT650/VT900 Gas Flow Analyzer (the • Full range, bi-directional air flow and volume
Analyzer or Product), is a general purpose gas channel
flow analyzer with special features for testing • Ultra-low flow and pressure ranges (VT900)
mechanical patient ventilators. The Analyzer
measures bi-directional air flow, high and • High pressure, vacuum and differential low
differential low pressure, barometric pressure, pressure
Oxygen concentration and airway pressure, • Airway pressure, Oxygen concentration,
airway temperature and airway humidity. The temperature, and humidity
VT900 also measures ultra-low flow (±750 ml/
• Barometric pressure
min) and ultra-low pressure (0 mbar to 10 mbar).
The Analyzer can be controlled externally using • External trigger input (VT900)
USB commands or automated with available • Rechargeable Li-ion battery with up to
software. The Analyzer operates on a 8 hours battery life
rechargeable Li-Ion battery or external power
supply for stationary or portable use. All figures • USB port
show the VT900 unless otherwise noted. • Customizable profiles that can be saved
• Numerical and graphical screens with real
time data
• Automation software available
• On-board memory

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Users Manual

Safety Information • Disable the Product if it is damaged.

A Warning identifies conditions and actions that • Do not use the Product if it is
pose hazards to the user; a Caution identifies damaged.
conditions and actions that may damage the • The battery door must be closed and
Product or the equipment under test. locked before you operate the
XW Warning Product.
• Recharge the battery when the low
To prevent possible electrical shock, fire,
battery indicator shows to prevent
or personal injury:
incorrect measurements. Low
• Read all safety information before battery will also corrupt the memory
you use the Product. card.
• Use the Product only as specified, or • Remove all probes, test leads, and
the protection supplied by the accessories before the battery door
Product can be compromised. is opened.
• Carefully read all instructions. • Remove all probes, test leads, and
• Do not use the Product around accessories that are not necessary
explosive gas, vapor, or in damp or for the measurement.
wet environments. • Use only specified replacement
• Use this Product indoors only. parts.
• Do not use the Product if it operates • Have an approved technician repair
incorrectly. the Product.

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 Gas Flow Analyzer
Safety Information

• Batteries contain hazardous • Remove the battery if the Product is

chemicals that can cause burns or not used for an extended period of
explode. If exposure to chemicals time, or if stored in temperatures
occurs, clean with water and get >50 °C. If the battery is not removed,
medical aid. battery leakage can damage the
• Do not disassemble the battery. Product.

• Repair the Product before use if the W Caution

battery leaks. To prevent possible damage, remove
• Use only Fluke approved power the O2 sensor if the Product is stored
adapters to charge the battery. in temperatures >50 °C.

• Do not short the battery terminals

together.
• Do not disassemble or crush battery
cells and battery packs.
• Do not keep cells or batteries in a
container where the terminals can
be shorted.
• Do not put battery cells and battery
packs near heat or fire. Do not put in
sunlight.

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VT650/VT900
Users Manual

Symbols used on the Analyzer and in this manual are explained in Table 1.
Table 1. Symbols

Symbol Meaning Symbol Meaning

W WARNING. RISK OF DANGER. X WARNING. HAZARDOUS VOLTAGE.

Risk of electric shock.
 Consult user documentation. P Conforms to European Union directives.

+ ) Conforms to relevant North American

Power button Safety Standards.

  Conforms to relevant Australian Safety

Li-ion Battery
and EMC standards.

" Power input 15 V dc 2.0 A  Conforms to relevant South Korean

EMC Standards.

 Conforms to the Appliance Efficiency Regulation (California Code of Regulations, Title 20,
Sections 1601 through 1608), for small battery charging systems.
This product complies with the WEEE Directive marking requirements. The affixed label indicates
that you must not discard this electrical/electronic product in domestic household waste. Product
~ Category: With reference to the equipment types in the WEEE Directive Annex I, this product is
classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this
product as unsorted municipal waste.

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 Gas Flow Analyzer
Unpacking and Inspection

Unpacking and Inspection • Do a visual inspection. Make sure the

Analyzer is intact. If there is any physical
Make sure you do not damage the Analyzer as damage, such as bent or broken parts, dents,
you unpack. or scratches, call a Fluke Biomedical Service
• Inspect the shipping carton for damage. Center immediately. To return the Analyzer to
Fluke Biomedical for service see Returns and
 If there is no damage, remove the
Repairs.
Analyzer from the shipping case. Save
the box and packing materials. • Check the standard accessories. If any
accessories are missing, contact a Fluke
 If the shipping carton is damaged,
Biomedical Service Center.
carefully continue to unpack the
Analyzer. Note any dents and scratches
on the Analyzer. Save the damaged
shipping carton and packing material for
the carrier’s inspection.

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VT650/VT900
Users Manual

Accessories
Table 2 is a list of the standard accessories provided with the Analyzer.

Table 2. Standard Accessories

Item Part Number

USB Serial cable 4015274
AC power adapter 4760480
Accessory kit with: 4922115
Bacterial filter for external connection to the flow ports (1) 2133712
1.2 m (4 ft) silicon tubing (2) 2237172
22 mm ID x 22 mm ID tubing adapters (2) 2133305
22 mm OD x 22 mm OD tubing adapters (2) 2133291
Tapered 15 mm OD x 22 mm OD tubing adapters (2) 2133269
DISS Handtight Nut/Nipple to 6.4 mm (1/4 in) ID hose barb adapter (1) 2216329
Certificate of Calibration with test data --

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 Gas Flow Analyzer
Accessories

Table 3 is a list of optional accessories.

Table 3. Optional Accessories

Item Part Number

Soft-sided carrying case for ACCU-LUNG 2397628
ACCU LUNG II test lung 4281291
ACCU-LUNG Lung Simulator with Soft-sided carrying
2387318
case (2397628)
VESA system mount 4969657

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VT650/VT900
Users Manual

The Analyzer
Figure 1 shows the top of the Analyzer.
 Touchsceen LCD
1
 Flow exhaust

VT900 GAS FLOW ANALYZER

 Flow inlet

2 3
D Low pressure + and -

FLOW
FLOW
E High pressure and vacuum
INLET
EXHAUST ± 300
lpm

F Ultra-low pressure (VT900)

G Ultra-low flow + and - (VT900)
H Power button

750 ml /min 0 TO 10 mbar 0.8 TO 10 bar 160 mbar

ULTRA ULTRA HIGH LOW
LOW FLOW LOW PRESSURE PRESSURE PRESSURE

8 7 6 5 4

Figure 1. Top of the Analyzer

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 Gas Flow Analyzer
The Analyzer

Figure 2 shows the back of the Analyzer.

1 1

O2 SENSOR ACCESS DOOR

6 5 4 3

Figure 2. Back of the Analyzer

 Handle clip D External trigger input (VT900)

 USB port E Battery status indicator
 Oxygen sensor door F External DC power input

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VT650/VT900
Users Manual

Figure 3 shows the bottom of the Analyzer.

 VESA mount points (FDMI MIS-C, fits WxH
1 2 3 of 75 mm x 35 mm)
 Oxygen sensor door screw
 Bail
D Battery door screws
E Battery door
Power On the Analyzer
To power on the Analyzer, push +.
The Analyzer defaults to the Airway screen.
Figure 4 shows the main screen of the Analyzer.

5 4

Figure 3. Bottom of the Analyzer

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 Gas Flow Analyzer
The Analyzer

To make a selection, tap the screen.

2 3

1 5

Figure 4. Example of Airway Measurement

 Measurement and Other Menus D Battery symbol

 Selected Profile E Display area
 Measurement settings F Screen options
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VT650/VT900
Users Manual

Analyzer Connections • Always use the external flow filter on

the main airflow channel inlet. This
You can connect the Analyzer to a ventilator and helps reduce turbulence and keeps
test lung in either a bi-directional or out small particles that could
unidirectional flow configuration. damage the flow sensor.
Airway Flow (Inlet and Exhaust) • To avoid damage to the sensor,
The outer diameter of the airway port is a make sure the pressure inside the
standard 22 mm fitting for use with patient airway port does not exceed 5 psi.
hoses. The inner diameter of the airway port • Measure only dry gases with the
accepts a 15 mm male respiratory fitting for use airway port. Do not use this port to
with endotracheal tubes, gas sampling adapters, measure humidified gases.
and similar equipment.
WCaution

To avoid damage to the Analyzer and

avoid adverse affects on the Analyzer
performance:
• Do not put metal objects into
connectors.

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 Gas Flow Analyzer
The Analyzer

Ultra-Low Flow + and - (VT900) High Pressure

The + and - ultra-low-flow ports have a barbed The high-pressure port is primarily to test wall
hose fitting connection. and tank pressurized gas sources. The
WCaution
connector works with standard oxygen DISS
fittings, as used on oxygen supply hoses.
To avoid damage to the Analyzer and
WCaution
avoid adverse affects on the Analyzer
performance: To avoid damage to the Analyzer and
• To avoid damage to the sensor, avoid adverse affects on the Analyzer
make sure the pressure inside the performance:
ultra-low-flow port does not exceed • To avoid damage to the sensor,
25 psi. make sure applied pressure does
• Measure only dry gases with the not exceed 188 psi (13 bar).
ultra-low-flow port. Do not use this • Measure only dry gases with the
port to measure humidified gases. high-pressure port. Do not use this
port to measure fluid pressure.

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VT650/VT900
Users Manual

Low Pressure (+ and -) Ultra-Low Pressure (VT900 only)

Measure differential low pressure between the + The ultra-low pressure port has a barbed hose
and - ports or gauge pressure on either port. fitting connection.
Connectors are barbed hose fittings. WCaution
WCaution
To avoid damage to the Analyzer and
To avoid damage to the Analyzer and avoid adverse affects on the Analyzer
avoid adverse affects on the Analyzer performance:
performance: • To avoid damage to the sensor,
• To avoid damage to the sensor, make sure applied pressure does
make sure applied pressure does not exceed 5 psi.
not exceed 5 psi. • Measure only dry gases with the
• Measure only dry gases with the ultra-low-pressure port. Do not use
low-pressure port. Do not use this this port to measure fluid pressure.
port to measure fluid pressure.

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 Gas Flow Analyzer
Test Setup

Test Setup Bi-directional Flow Mode

Use the airway port for ventilator testing. Use a For bi-directional flow connections, see Figure 5.
test lung to set up a test that measures ventilator 1. Use a Y-piece adapter to connect the
parameters in bi-directional or uni-directional ventilator to the flow inlet on the Analyzer.
modes. Fluke Biomedical recommends the bi-
directional mode. 2. Use a standard breathing hose to connect to
the exhaust port on the Analyzer.
The Analyzer shows the flow of gas
delivered by the ventilator.

Exhaust Inspiratory Hose

Inlet

VT900 GAS FLOW ANALYZER

Ventilator
Test Lung FLOW
EXHAUST
FLOW
INLET
± 300 lpm

750 ml /min 0 TO 10 mbar 0.8 TO 10 bar 160 mbar

ULTRA ULTRA HIGH LOW
LOW FLOW LOW PRESSURE PRESSURE PRESSURE

Expiratory Hose

Figure 5. Bi-Direction Flow Mode Connections

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VT650/VT900
Users Manual

Unidirectional Flow Mode Inspiratory Flow Connections

Use the unidirectional flow to measure either For inspiratory connections, see Figure 6.
inspiratory or expiratory gas flow. 1. Connect the inspiratory hose to the flow inlet
on the Analyzer.
2. Use a standard breathing hose to connect
the test lung to the exhaust port on the
Analyzer.

Exhaust Inlet

Inspiratory Hose VT900 GAS FLOW ANALYZER

FLOW
FLOW INLET
EXHAUST ± 300 lpm

Ventilator
Test Lung
750 ml /min 0 TO 10 mbar 0.8 TO 10 bar 160 mbar
ULTRA ULTRA HIGH LOW
LOW FLOW LOW PRESSURE PRESSURE PRESSURE

Expiratory Hose

Figure 6. Inspiratory Breathing Circuit Connections

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 Gas Flow Analyzer
Test Setup

Expiratory Test Connections 2. Use a standard breathing hose to connect

the ventilator to the exhaust port on the
For expiratory connections, see Figure 7. Analyzer.
1. Connect the expiratory hose from the test The Analyzer shows the flow of gas
lung to the flow inlet on the Analyzer. delivered by the ventilator.

Inspiratory Hose

Exhaust Inlet

Ventilator
Test Lung
VT900 GAS FLOW ANALYZER

FLOW
FLOW INLET
EXHAUST ± 300 lpm

Expiratory Hose

750 ml /min 0 TO 10 mbar 0.8 TO 10 bar 160 mbar

ULTRA ULTRA HIGH LOW
LOW FLOW LOW PRESSURE PRESSURE PRESSURE

Figure 7. Expiratory Breathing Circuit Connections

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VT650/VT900
Users Manual

Operations Measured Signals

Use the Analyzer to measure flow and pressure. The Analyzer measures these signals:
For each test: select the test and do the setup. • Airway flow
Displayed options depend on the selected test: • Airway pressure
• Zero—Corrects sensor offsets for the • Airway temperature and humidity
selected measurements.
• High pressure
• Graph—Select the parameters to graph.
• Low pressure
• Back—Return to the previous screen.
• Ultra-low pressure (VT900)
• Clear—Clear the graph and statistics
(minimum, maximum, and average). • Ultra-low flow (VT900)

• Autoscale—Toggles between Autoscale and • Barometric pressure

manual scale. • Oxygen concentration
• Profiles—Select a different profile. • Calculated breath parameters
• Save—Saves the final result.

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 Gas Flow Analyzer
Operations

Airway Flow Airway Temperature and Humidity

The Analyzer has a full-range flow (±300 lpm), There is a temperature / humidity sensor in the
with bi-directional flow measurement. Flow airway channel on the exhaust side of the flow
measurements are either static flows—no sensor. The Analyzer uses the temperature
breath variations, or ventilator waveforms—both reading to automatically adjust for the gas
an expiratory phase and an inspiratory phase. corrections (see Table 6).
The Analyzer uses a heat transfer sensor to Tap More Data on the Airway screen to see
measure the flow. temperature and humidity.
Use this measurement for pediatric or adult
High Pressure
ventilators or to determine the performance of
many types of flow meters. The high-pressure port measures gauge
pressure in the range of -0.8 bar to 10 bar. The
Airway Pressure
Analyzer can use this pressure measurement for
The Analyzer measures airway pressure from a any gauge pressure in the given range.
proximal tap of the channel (near the exhaust
port).

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Users Manual

Low Pressure Ultra-Low Flow (VT900)

The low-pressure port is a dual-port connection The Analyzer (VT900 only) has ultra-low flow
consisting of a (+) positive and a (-) negative (±750 ml/min) bi-directional flow measurement
pressure port. capability. The flow measurement is for
The differential pressure range is ±160 mbar. accurate, high resolution, static low flow
Use this pressure measurement for any measurements, not for ventilator waveforms.
pressure differential or gauge pressure in the The flow sensor uses the heat transfer method
given range. to measure air flow. Use the ultra-low flow to
measure many types of low flow meters.
Ultra-Low Pressure (VT900)
Barometric Pressure
The ultra-low pressure sensor measures gauge
pressure in the range of 0 mbar to 10 mbar. Use The Analyzer makes barometric pressure
this pressure range for accurate, very low measurements. The barometer reads absolute
pressure measurements. pressures from 8 psia to 18 psia. The Analyzer
also uses the barometer in the automatic gas
corrections for airway flow measurements.

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 Gas Flow Analyzer
Operations

Oxygen Concentration Calculated Breath Parameters

The Analyzer measures oxygen concentration From the primary flow and pressure
through the airflow channel. An integrated measurements, the Analyzer calculates breath
sensor measures the oxygen percent of the gas parameters. A breath detection algorithm
in the airflow channel of the Analyzer. The range determines the various phases of a ventilator
for this sensor is 0 % to 100 %. The oxygen cell breath and calculates the parameters listed in
is mounted inside the enclosure on the rear Table 10.
bulkhead for the high-flow circuit. The oxygen
Excel Add-in
cell must be replaced approximately once a year
(VT650) or every 2 years (VT900). Install custom Excel add-in, available for
download at www.flukebiomedical.com. Use the
Excel Add-in on a PC to view results data. The
Excel Add-in has these worksheets:
• Data – shows saved data
• Recording – shows recorded data
• Graph – shows graphs and data

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Users Manual

Measurements Save a Measurement

Figure 8 is an example of the measurement The Analyzer can save readings or start a
screen. recording to save.
Make a Measurement To save a measurement:
To make a measurement: 1. On the measurement screen, tap Save.
1. Select the type of measurement. 2. Select the type of reading you want to save.
2. To set the offset to zero, tap Zero. Make  Data—The current data points.
sure to remove all the connections.  Graph—The current data points in a
Note graphical format.
You may need to block the airflow channel  Record—Set up the parameters and
if room air currents are present. start a new recording to save.
3. To switch between Auto and manual scaling,
tap Autoscale.

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 Gas Flow Analyzer
Operations

1
2

2
3

Figure 8. Example of Measurement

 Measurements D Toggle manual or automatic scaling

 Change scaling
 Graph area

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VT650/VT900
Users Manual

Main Menu Functions Profiles Menu

Use the Main menu to access the Analyzer You can configure the settings on the Analyzer
functions, including: to create test profiles. The analyzer can save up
• Profiles to 20 profiles.

• Setup The Analyzer stores the profiles using a numeric

code and a profile name. 00 is the default
• Units numeric code. You cannot change the 00 default
• Special Tests profile. An asterisk (*) indicates the profile that
will be loaded at start up.
• Memory
To select a profile, use the arrow keys.
• Customize Breath Views
To manage profiles, select Menus > Profile or
• Calibrate Oxygen
tap Profile on the Airway screen.
• Test ID
Options are:
• View Current —View the settings for the
current profile loaded on the Analyzer. Tap
More for another page of settings.
• View Selection—View the settings of the
highlighted profile in the profile list. Tap More
for another page of settings.

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 Gas Flow Analyzer
Operations

• *Use on Power-Up—Make the selected Setup Menu

profile the default profile.
Use the Setup menu to make and view the
• Back—Go to the main Profile menu. Analyzer settings.
• Edit Name—Change the name of the To setup the Analyzer, select Menus > Setup.
selected profile.
For Setup selections, see Table 4.
• Load—Select a profile to load. If there are no
saved profiles, the option is Default.
• Save—Saves the current profile.

Table 4. Setup Menu

Setup Description
Gas Select the type of gas. See Table 5.
Select the type of Gas correction (temperature and pressure) to different
Correction Mode
gas standards. See Table 6.

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VT650/VT900
Users Manual

Table 4. Setup Menu (cont.)

Setup Description
Sets the options for Breath Detection. Options are:
• Mode - Sets the breath detection mode:
 Bidirectional
 Uni-directional Inspiratory
 Uni-directional Expiratory
 Off - disables breath triggering
• Trigger Source - Sets how the breath detection is triggered:
 Flow - Set the Threshold
Breath Detect  Pressure - Requires back pressure, such as a test lung
 External - enables external TTL triggering input on the Analyzer
(VT900)
• Patient - Sets the type of patient:
 Adult
 Pediatric
• Threshold - Enter the numeric value for the detection limit.
 + (Inspiratory threshold)
 - (Expiratory threshold)

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 Gas Flow Analyzer
Operations

Table 4. Setup Menu (cont.)

Setup Description
Displays basic information about
the Analyzer including: • Date of calibration
Instrument • Model number • Battery charge level
Information
• Serial number • Memory remaining
• Firmware version
Options are:
Auto Dim • On - The LCD dims after 5 minutes of no use. Tap to restore brightness.
• Off - The LCD does not auto dim.
Options are:
• Off
Beeper • Soft
• Medium
• Loud

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VT650/VT900
Users Manual

Table 4. Setup Menu (cont.)

Setup Description
Options are:
• Set Time Format - Select 12 hour with am/pm or 24 hour.
• Set Time - Tap the arrows to set the time. If in 12-hour format, select am
Time and Date or pm.
• Set Date Format - Select MM/DD/YYYY, DD/MM/YYYY, or 
YYYY/MM/DD.
• Set Date - Tap the arrows to set the date.
Options are:
• Low
Brightness
• Medium
• High
Language Select the language.

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 Gas Flow Analyzer
Operations

Table 5. Gas Types

Gas Type Description

Air Standard room air
N2 100 % Nitrogen
N2O 100 % Nitrous Oxide
CO2 100 % Carbon Dioxide
O2 100 % Oxygen
Ar 100 % Argon
Heliox 21 % Oxygen, and 79 % Helium
O2 bal N2O mix[1] Measured Oxygen, balance Nitrous Oxide
O2 bal He mix[1] Measured Oxygen, balance Helium
O2 bal N2 mix[1] Measured Oxygen, balance Nitrogen
[1]
For these gases, the oxygen concentration is measured using the oxygen sensor in the airflow channel. The balance is the other gas. These
gases can only be measured in the airflow channel, not available in the ultra-low-flow channel of the VT900.

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Users Manual

Table 6. Gas Correction Mode

Gas Correction Description

ATP Ambient temperature and pressure (actual humidity)
ATPD Ambient temperature and pressure, dry (0 % humidity)
ATPS Ambient temperature and pressure, saturated (100 % humidity)
STP20 Standard temperature 20 °C, standard pressure 760 mmHg (actual humidity)
STP21 Standard temperature 21 °C, standard pressure 760 mmHg (actual humidity)
STPD0 Standard temperature 0 °C, standard pressure 760 mmHg, dry (0 % humidity)
STPD20 Standard temperature 20 °C, standard pressure 760 mmHg, dry (0 % humidity)
STPD21 Standard temperature 21 °C, standard pressure 760 mmHg, dry (0 % humidity)
BTPS Body temperature 37 °C, ambient pressure 760 mmHg, saturated (100 % humidity)
BTPD Body temperature 37 °C, ambient pressure 760 mmHg, dry (0 % humidity)
Note: Gas correction applies to the airflow channel. The ultra-low-flow channel of the VT900 is set to STPD21.

30
 Gas Flow Analyzer
Operations

Units Table 7. Available Units of Measure (cont.)

You can change the units of measure for all Unit Description
readings.
Volume
To set the units:
l Liters
1. Select Menus > Units.
ml Milliliters
2. Select the type of reading.
cf Cubic feet
3. Select the unit of measure. See Table 7.
Temperature
4. Select OK.
Table 7. Available Units of Measure °C Celsius

Unit Description °F Fahrenheit

Flow
lpm Liters per minute
lps Liters per second
mlpm Milliliters per minute
mlps Milliliters per second
cfm Cubic feet per minute

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Users Manual

Table 7. Available Units of Measure (cont.) Special Tests Menu

Unit Description Use the Special Tests menu for more tests.
Pressure Leak Tests calculate the lost volume over the
specified time. To do a leak test:
mbar millibar = 0.001 bar
1. Select Menus > Special Tests.
bar 14.7 psi
2. Select the type of leak test:
mmHg Millimeters of mercury
 Airway Pressure
inHg Inches of mercury
 High Pressure
cmH20 Centimeters of water  Low Pressure
inH20 Inches of water  Ultra-Low Pressure
psi Pounds per square inch 3. Use the keypad to enter the length of the
atm Atmosphere test.
4. Tap Compliance and use the keypad to
kPa Kilopascals
enter the compliance limit.
Use compliance to calculate volume lost. For
example, enter the ml of volume lost per
cmH2O. If blank, volume lost is not
calculated.
5. Tap Start.

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 Gas Flow Analyzer
Operations

Trend Tests show how a particular breath The test stops when the number of breaths
parameter performs over time. To do a trend is reached or you select End.
test: The High Frequency Test measures high-
1. Select Menus > Special Tests > Trend frequency flow and airway pressure.
Test. 1. Select Menus > Special Tests > High
2. Use the arrows to select the parameter to Frequency Test
measure. 2. Apply the high-frequency flow or pressure.
3. Use the keypad to enter the % limit for Calibrate Oxygen
maximum allowed deviation.
Calibrate the oxygen sensor at the beginning of
4. Tap Start.
each day that oxygen will be measured, and
The Stacked Volume Test measures the volume after replacing the sensor.
of multiple breaths. Breath volume determines
To calibrate the sensor:
the accuracy of the ventilator in accumulating
volume. 1. Select Menus > Calibrate Oxygen.
1. Select Menus > Special Tests > Stacked 2. Follow the on-screen instructions. Make sure
Volume Test. to complete both steps.
2. Use the key pad to enter the number of If the calibration fails, replace the Oxygen
breaths. sensor. If the problem persists, contact Fluke
Biomedical for repair.
3. Select Start.

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Users Manual

Customize Breath Views Test ID

Use Customize Breath Views to configure Use the Test ID to identify saved test data. Use
custom breath screens with up to eight readings the keyboard to enter a Test ID. When viewing
each. Select the Airway or the Breath Memory, select a Test ID to see the saved data.
parameters to show.
Memory Menu
Use Memory to manage stored readings.
1. Select Menus > Memory.
2. Select List.
Options are:
• Back—Go back to the previous screen.
• View—Views the selected reading.
• Delete—Deletes the selected reading.
• Delete All—Deletes all readings.

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 Gas Flow Analyzer
Maintenance, Service and Calibration

Maintenance, Service and Cleaning

Calibration Clean the exterior of the Analyzer occasionally
with a cloth dampened with a mild detergent
The Analyzer requires little maintenance or
solution. To remove stains and clean the
special care; however it is a calibrated
Analyzer, use a solution of 70 % isopropyl
measuring instrument and should be treated
alcohol. Fluke Biomedical does not recommend
with care.
any other solvents.
W Caution
W Caution
To prevent damage to the Analyzer or
To prevent damage to the Analyzer or
adverse affects on the Analyzer
adverse affects on the Analyzer
performance, do not drop the Analyzer
performance, do not spray liquid directly
and avoid mechanical abuse that could
on the Analyzer. Do not immerse the
cause a shift in the calibrated settings.
Analyzer.
Fluke Biomedical recommends storing the
Analyzer in the carry case. Do not store the
Analyzer where there is vibration.
During use, always use the external flow filter on
the main airflow channel inlet. The filter helps
reduce turbulence and keeps out small particles
that could damage the flow sensor.

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VT650/VT900
Users Manual

Oxygen Sensor Replacement 5. Re-connect the sensor wire.

The Analyzer uses a galvanic oxygen sensor 6. Replace the oxygen sensor door.
that is under warranty for 12 months. You must 7. Re-calibrate the oxygen sensor. (See
replace the oxygen sensor cell when the oxygen Calibrate Oxygen.)
calibration cannot be successfully completed.
The oxygen sensor can operate for longer than Battery Status
12 months depending on use. With normal use The Battery status indicator on the back of the
the VT650 oxygen sensor will last 12 months Analyzer has these normal states:
and the VT900 oxygen sensor will last
• Solid red—Battery is charging
24 months.
• Solid green—Battery is 100 % charged
To replace the oxygen sensor:
The battery has these error states:
1. Remove the screws in the oxygen sensor
door on the back of the Analyzer. • Blinking red—Battery charger error
The oxygen sensor is a round plastic • Blinking red/green—Battery charger error
cylinder about one inch in diameter with (Battery is near full charge.)
wires protruding from the back of the sensor. For these errors, remove the ac adapter and
2. Disconnect the electrical connector on the reinstall. If the problem reoccurs, replace the
sensor wire. battery pack. If the problem persists, contact
Technical Support.
3. Unscrew the old sensor and remove it.
4. Screw in the new sensor. (See Replaceable
Parts).

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 Gas Flow Analyzer
Maintenance, Service and Calibration

Battery Replacement
To check the battery charge level, remove the
1
battery door and push the TEST button on the
battery. The battery displays the percentage of 2
charge.
Use only the replacement battery listed in
Table 8.
3
To replace the battery (See Figure 9):
1. Loosen the screws on the battery door. (The
screws do not come out.)
2. Remove the battery door.
3. Use the strap on the battery to lift out the
battery.
4. Insert the new battery and replace the
battery door.

Figure 9. Battery Replacement

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VT650/VT900
Users Manual

Replaceable Parts Service and Calibration

Table 8 is a list of the replaceable parts for the To maintain accuracy, calibrate the Analyzer
Analyzer. annually. If the Analyzer does not operate
Table 8. Replaceable Parts successfully or if it needs calibration, return it to
the Fluke Biomedical Service Center, as
Item Fluke Part Number indicated under Warranty and Product Support.
Oxygen sensor (VT650) 2138514 As part of this service, hardware and software
updates are automatically installed.
Oxygen sensor (VT900) 4917220
W Caution
O2 sensor door 4916215
To prevent damage to the Analyzer or
Battery Door 4916194 adverse affects on the Analyzer
performance:
Battery Pack 4948749
• Other than replacement of minor
Protective cap (High-
2133735 components, such as the oxygen
pressure)
sensor, all Analyzer service should be
Protective caps (Flow) 2133758 done by qualified service personnel.
Protective caps (Pressure) 4918975

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 Gas Flow Analyzer
Specifications

• To keep foreign debris from entering Specifications

the Analyzer, use flow and pressure
Specifications are based on a one year calibration cycle and apply
protective caps when transporting to ambient temperature 18 °C to 28 °C unless stated otherwise.
the Analyzer. Display ....................................7 in, 800 x 480 touchscreen LCD
• To keep the Analyzer under Communications .....................USB, Micro-B Device Port
warranty, make sure the Analyzer is Environmental Conditions
Operating Temperature ......10 °C to 40 °C
calibrated by qualified service
Storage Temperature..........-20 °C to +60 °C
personnel only.
Note
For storage temperatures below -15 °C or above
+50 °C, remove the oxygen sensor.
Operating Humidity .............10 % to 90 % non-condensing
Storage Humidity ................5 % to 95 % non-condensing
Altitude................................3000 m
Power
AC adapter
Input Voltage Range .......100 V ac to 240 V ac
Input Frequency
Range .............................50 Hz/60 Hz
DC Output.......................15 V, 2 A
Polarity ............................Center positive (+)

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VT650/VT900
Users Manual

Battery Low Pressure

Rechargeable Li-Ion Maximum applied 
Battery ........................... 10.8 V, 2.5 Ah, 27 Wh, 3ICR19/66 pressure ............................. 400 mbar
Discharge temperature... 0 °C to 50 °C Operating Pressure............ (Differential) ±160 mbar
Charge temperature ....... 0 °C to 40 °C Span Accuracy................... ±0.5 % of rdg or ±0.1 mbar
Battery life ...................... 8 hours (whichever is greater)
Battery charge time ........ 5 hours, typical Resolution .......................... 0.01 mbar
Note High Pressure
Battery life is dependent on backlight brightness, auto- Maximum applied 
dim, and other battery intensive settings. pressure ............................. 13 bar

Pressure Operating Pressure............ -0.8 bar to 10 bar

Span Accuracy................... ±1 % of rdg or ±7 mbar (whichever
Ultra Low Pressure (VT900) is greater)
Maximum applied  Resolution .......................... 1 mbar
pressure ............................. 400 mbar Airway Pressure
Operating Pressure ............ 0 mbar to 10 mbar Maximum applied 
Span Accuracy .................. ±1 % of rdg or ±0.01 mbar pressure ............................. 400 mbar
(whichever is greater) Operating Pressure............ ±160 mbar
Resolution .......................... 0.001 mbar Span Accuracy................... ±0.5 % of rdg or ±0.1 mbar
(whichever is greater)
Frequency Response......... 10 % to 90 % rise time <10 ms
Resolution .......................... 0.01 mbar
Sample rate  200 Hz
Pressure Temperature
Coefficient .............................. Add 0.01 % of range per °C
between 10 °C and 18 °C
Add 0.01 % of range per °C
between 28 °C and 40 °C

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 Gas Flow Analyzer
Specifications

Flow Table 9. Airway Flow Range and Accuracy (cont.)

Airway Flow Gas Range Specification

Resolution...........................0.01<100 slpm and 
0.1 >100 slpm Carbon Dioxide (CO2),
3.0 % of rdg or
Accuracy .............................see Table 9 Nitrous Oxide (N2O), ±150 slpm
0.08 slpm, typical
O2 bal N20,
Frequency Response..........10 % to 90 % rise time <10 ms
Sample Rate 200 Hz Ultra-low Flow (VT900)
Dynamic Resistance ..........<2.00 cmH2O @ 60 slpm
Ultra-Low-Flow (VT900) Air, Nitrogen (N2), 1.7 % of rdg or
±0.750 slpm
Oxygen (O2) 0.01 slpm
Range .................................±750 ml/min
Accuracy .............................±1.7 % of rdg or 0.01 slpm 3.0 % of rdg or
Argon ±0.750 slpm
Resolution...........................0.001 lpm 0.02 slpm, typical

3.0 % of rdg or
Table 9. Airway Flow Range and Accuracy Nitrous Oxide (N2O) ±0.400 slpm
0.02 slpm, typical

Gas Range Specification Note: Ultra-low flow that is over range can be detected
as unstable. If this occurs, reduce flow.
Main Airway Flow
Flow Temperature
Air, Nitrogen (N2), 1.7 % of rdg or Coefficient ...............................Add 0.2 % of reading per °C
±300 slpm between 10 °C and 18 °C
Oxygen (O2) 0.04 slpm
Add 0.2 % of reading per °C
Argon, Heliox, 3.0 % of rdg or between 28 °C and 40 °C
±300 slpm
O2 bal He, O2 bal N2 0.08 slpm, typical

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VT650/VT900
Users Manual

Volume (Airway Flow channel) Gas correction

Range................................. 100 l See Table 6.
Accuracy ............................ ±1.75 % rdg or 0.02 l Gas types
(whichever is greater) Air, Nitrogen (N2), Nitrous Oxide (N2O), Carbon Dioxide (CO2),
Resolution .......................... 0.001<1 and 0.01>1 l Oxygen (O2), Argon, Heliox (21 % O2, 79 %He), Oxygen/
Temperature and Humidity (Airway Flow channel) Nitrogen, Oxygen/Nitrous Oxide, Oxygen/Helium
Temperature range ............ 0 °C to 50 °C Units of measure
Temperature accuracy*...... ±0.5 °C Flow ................................... lpm (liter/minute), cfm (ft3/minute),
Temperature resolution ...... 0.1 °C lps (liter/sec), ml/min, ml/sec
Humidity range ................... 0 % to 100 % RH Pressure............................. psi, kPa, bar, mbar, atm, inH2O (at
4 °C, inHg (at 0 °C), cmH2O (at
Humidity accuracy* ............ 3 % RH from 20 % to 80 % RH 4 °C), mmHg (at 0 °C)
5 % RH < 20 %, and >80 % RH
Volume............................... l (liter), cf (ft3), ml
Humidity resolution............. 0.1 % RH
Temperature ...................... C, F
* with steady state air flow
Oxygen concentration (Airway Flow channel) Humidity ............................. % RH

Range................................. 0 % to 100 % Safety

Accuracy ............................ ±1 % (VT900), ±2 % (VT650) General .............................. IEC 61010-1: Pollution Degree 2

Resolution .......................... 0.1 % Lithium Battery ................... IEC 62133

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 Gas Flow Analyzer
Specifications

Electromagnetic Compatibility (EMC)

International ........................IEC 61326-1: Controlled
Electromagnetic Environment
CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or
uses conductively-coupled radio frequency energy that is
necessary for the internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments
other than domestic and those directly connected to a low-
voltage power supply network that supplies buildings used
for domestic purposes. There may be potential difficulties
in ensuring electromagnetic compatibility in other
environments due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in
residential environments and may not provide adequate
protection to radio reception in such environments.
Emissions that exceed the levels required by CISPR 11
can occur when the equipment is connected to a test
object.
Korea (KCC) ...................Class A Equipment (Industrial
Broadcasting & Communication
Equipment)
Class A: Equipment meets requirements for industrial
electromagnetic wave equipment and the seller or user
should take notice of it. This equipment is intended for use
in business environments and not to be used in homes.
USA (FCC)......................47 CFR 15 subpart B. This product
is considered an exempt device per
clause 15.103.

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Table 10. Breath Parameter Accuracy

Parameter Abbreviation Resolution Range Accuracy

Inspiratory Tidal Volume Vti 0.1 ml 0 l to 60 l ±1.75 % of rdg or 0.02 l
Expiratory Tidal Volume Vte 0.1 ml 0 l to 60 l ±1.75 % of rdg or 0.02 l
Minute Volume
(The Expiratory Tidal Volume times the MV 0.001 lpm 0 l to 100 l ±1.75 % of rdg or 0.02 l
respiratory rate in breaths per minute.
Reported as an eight-breath average.)
Breath Rate BPM 0.1 bpm 1 bpm to 1500 bpm 1%
Inspiratory to Expiatory Time Ratio (I:E
Ratio)
I:E 0.01 1:300 to 300:1 ±2 % or 0.1
(The ratio of the Inspiratory Time to the
Expiratory Time)
Peak Inspiratory Pressure
(The maximum pressure during the PIP 0.1 mbar ±160 mbar ±0.75 % of rdg or 0.1 mbar
Inspiratory Time.)
Inspiratory Pause Pressure IPP 0.1 mbar ±160 mbar ±0.75 % of rdg or 0.1 mbar
Mean Airway Pressure
(The mean pressure over the entire MAP 0.1 mbar ±160 mbar ±0.75 % of rdg or 0.1 mbar
breath.)
Positive End-Expiratory Pressure
(The average pressure during the End PEEP 0.1 mbar ±160 mbar ±0.75 % of rdg or 0.1 mbar
Expiratory State.)
Lung Compliance[1] CMPL 0.1 ml/mbar 0 ml/mbar to 1000 ml/mbar ±3 % or 0.1 ml/mbar

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 Gas Flow Analyzer
Specifications

Table 10. Breath Parameter Accuracy (cont.)

Parameter Abbreviation Resolution Range Accuracy

Inspiratory Time
(The time of the inspiratory period Ti 0.01 sec 0 sec to 60 sec 0.02 sec
including the inspiratory hold time.)
Inspiratory Hold Time
TiH 0.01 sec 0 sec to 60 sec 1 % or 0.1 sec
(The time of the End Inspiratory State.)
Expiratory Time
(The time of the expiratory period Te 0.01 sec 0 sec to 90 sec 0.5 % or 0.01 sec
including the expiratory hold time.)
Expiratory Hold Time
TeH 0.01 sec 0 sec to 90 sec 0.02 sec
(The time of the End Expiratory State.)
Peak Inspiratory Flow
(The maximum of the absolute value of
PIF 0.01 lpm ±300 lpm ±1.7 % or 0.04 lpm
the Flow Rate measured during the
Inspiratory Time.)
Peak Expiratory Flow
(The maximum of the absolute value of
PEF 0.01 lpm ±300 lpm ±1.7 % or 0.04 lpm
the Flow Rate
measured during the Expiratory Time.)
[1] Inspiratory pause time >0.5 sec

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46