CHAD Evolution OM-900 User manual

PRODUCT INFORMATION
AND INSTRUCTIONS
OM-900
Evolution
OXYGEN CONSERVER
TM

TABLE OF CONTENTS
General Information .............................................3
Important Safety Rules and Precautions
Operating the Unit .........................................4-6
Accessories/Repairs .........................................6
Introduction
Purpose ..................................................7
User Qualification ........................................... 7
Function ..................................................8
Description of Parts and Controls .................................9-10
Assembly and Use
Non-Portable Use..........................................11
Installing Alkaline Batteries...................................12
Monitoring Battery Energy Level ..............................13
Installing the System .......................................13
Operating Instructions ......................................14
Oxygen Cylinder Duration ........................................15
1

Care and Maintenance
Hygienic Preparation ....................................... 16
Intervals .................................................16
Procedure ................................................17
Patient Change............................................17
Functional Check ..........................................18
Disposal .................................................18
Products, Spare Parts, Accessories ................................19
Troubleshooting Guide ..........................................20
Classifications and Specifications
Technical Data ..........................................21-23
Separation Distances .......................................24
Symbols Key..............................................25
Limited Warranty ............................................... 26
Important Information to Record ...................................27
Notes ......................................................28-30
TABLE OF CONTENTS
2

This manual provides the information necessary to operate the EVOLUTIONTM electronic oxygen
conserver with built-in regulator in accordance with a physician’s prescription.
The EVOLUTIONTM conserver can be used with any
CGA 870 post-valve cylinder (see Fig. A) at home
or away from home to provide your specific oxygen
requirements. It requires two (2) 1.5 volt AA alkaline
batteries for operation.
Statements in this manual preceded by the following
words are of special significance:
WARNING!
Indicates there is a possibility of injury to you or others.
CAUTION!
Indicates there is a possibility of damage to the device or to other property.
☛ NOTE
Indicates points of particular interest or emphasis that allow for more efficient and convenient
operation of the equipment.
GENERAL INFORMATION
Cylinder Valve
Toggle
Parallel
Pin Index
Holes
FIGURE A
CGA 870
Post-Valve Cylinder
3
Valve

IMPORTANT SAFETY RULES & PRECAUTIONS
Read this instruction manual carefully to ensure your complete understanding before operating your
EVOLUTIONTM electronic conserver. This manual is part of the unit and must be available at all times.
Use the unit for the designated purpose only (see “Purpose” on page 7).
For your own safety and that of your patients, please observe the following points:
OPERATING THE UNIT
WARNING!
Failure to observe the following warnings may result in damage to the unit or injury to life or
limb:
• Smoking near oxygen equipment is strictly prohibited. While using your EVOLUTIONTM conserver, your
clothes may come into contact with oxygen-enriched air, making your clothes more flammable. This
also applies for a time after use, until the increased oxygen concentration has escaped from your
clothing. For this reason, you must keep cigarettes, matches, burning tobacco and open flames,
such as lighted candles or fireplaces, away from the area where the system is being stored or
operated.
• Avoid the creation of any spark, such as static electricity caused by any type of friction, near the
oxygen equipment.
☛ NOTE: Oxygen will not burn; however, it does vigorously accelerate the burning of any flammable material.
• Cannula tubing is a disposable accessory that should be replaced periodically following normal
usage. Continue reuse of cannula tubing may cause contamination which may lead to respiratory
distress. Disposable tubing should be disposed of in accordance with local ordinances and/or
regulations for disposal. Replacements are available through your homecare provider. (OC-401S,
case of fifty (50) 4 ft [1.52m] cannulas or equivalent).
4

IMPORTANT SAFETY RULES & PRECAUTIONS
WARNING! (Cont.)
Please remember that this is for your own safety!
• Keep all parts free of oil and grease. Hydrocarbon compounds such as oil, grease, petroleum-
based products, cleaning agents containing alcohol, hand cream or adhesive bandages can
cause explosive reactions if they come into contact with highly compressed oxygen. Please
wash and dry your hands properly prior to operating your oxygen equipment.
• Never use aerosol sprays near the oxygen equipment.
• Do not use in the presence of flammable anesthetic mixture.
• Keep your oxygen equipment at least 5 ft. (1.5 m) away from any electrical appliance.
• Be sure to turn off the oxygen supply by closing the cylinder valve when not in use.
• Do not use cannula tubing that is longer than 7 ft. (2.13 m).
• Do not use a mask or pediatric or other low-flow cannula tubing when operating the unit.
• Do not use the EVOLUTIONTM conserver as a handle for carrying your oxygen cylinder.
CAUTION!
• To prevent the unit from overheating, do not place it near any heating devices and do not
expose it to direct sunlight. Do not expose the unit to extreme temperatures.
• Your EVOLUTIONTM conserver must not be immersed in liquid or cleaned with liquid agents.
Prevent water or other liquid substances from entering the unit.
• Protect your EVOLUTIONTM conserver from the cold and from continued exposure to water,
such as rain.
• Please observe the section “Hygienic Preparation” on page 16 in order to avoid infection or
bacterial contamination.
• Prevent dust or any small particles from entering the unit.
• Take care not to get entangled in the nasal cannula tube, which could impede movement and
lead to discomfort around the throat.
• Your EVOLUTIONconserver is protected against interference. To ensure safety of use,
however, do not use a mobile phone in the immediate vicinity of the unit.
5

CAUTION! (Cont.)
• Oxygen conserving systems only work reliably upon sufficiently strong inhalation. Therefore,
please observe the following:
• Do not use the EVOLUTIONTM at night or while sleeping;
• Do not use the EVOLUTIONTM for babies or children;
• Do not use the EVOLUTIONTM if you only breathe through your mouth.
• Do not use the EVOLUTIONTM if you breathe more than 40 times per minute.
• Closely observe the permissible ambient conditions listed in the “Technical Data” section on
pages 21-23. Failure to observe them may lead to a fire risk or damage to the unit.
• Tighten all screwed unions by hand only. Do not use a tool.
• Do not use the EVOLUTIONTM with a humidifier.
• Do not use if leaking or damaged.
• Always open the cylinder valve slowly.
• Be sure to carry extra AA-size alkaline batteries in the event they are needed.
☛ NOTE:
• Always ensure that your oxygen cylinder is sufficiently full. We recommend always keeping a full
spare cylinder in reserve.
• Oxygen supplied by this equipment is supplemental only and is not intended for life support applications.
ACCESSORIES/REPAIRS
CAUTION!
• Malfunctions and a lack of biocompatibility may result if third-party articles are used. Please bear
in mind that in these cases any guarantee entitlement and liability shall lapse where accessories
recommended in the instruction manual or original spare parts are not used.
• Servicing and repair work must only be carried out by the manufacturer (CHAD Therapeutics) or
by trained personnel. Refer repairs to authorized personnel.
Please contact your Home Care Provider if you have any questions.
6
IMPORTANT SAFETY RULES & PRECAUTIONS

INTRODUCTION
PURPOSE
The EVOLUTIONTM electronic conserver is designed for use as part of a portable ambulatory
oxygen system for the purpose of facilitating long-term oxygen therapy (LTOT). It provides
mobile LTOT patients with an extended operating time of their mobile system. The EVOLUTIONTM
conserver includes a combination of a low-pressure regulator and an oxygen conserver and
is capable of delivering a precise amount of supplemental oxygen at the optimal point in the
breathing cycle. Operationally, the EVOLUTIONTM conserver greatly increases efficiency in the
delivery of oxygen, maximizing the beneficial effects and eliminating unnecessary oxygen waste.
The EVOLUTIONTM is not suitable for use during sleep.
The EVOLUTIONTM is not suitable for children.
Use the unit exclusively for the purpose described above.
USER QUALIFICATION
Prior to beginning therapy, patients must be given instruction by qualified personnel on how to
use the unit.
7

INTRODUCTION
8
FUNCTION
When we breathe, approximately one-third of the time is spent inhaling, and two-thirds exhaling.
As a result, oxygen delivered by continuous flow is wasted during exhalation. By eliminating
oxygen flow during exhalation, a two-thirds savings is possible. Additionally, the application
of the EVOLUTIONTM is based on the fact that only oxygen inhaled at the beginning of the
breath actually reaches the alveoli and is absorbed by the body. The oxygen inhaled during the
remainder of the breath is not used and is exhaled again. For this reason, the EVOLUTIONTM
only administers oxygen at the beginning of inhalation. This makes the oxygen source last
longer. The EVOLUTIONTM is designed to be an integral component of a lightweight, long-lasting
ambulatory system.

DESCRIPTION OF PARTS & CONTROLS
FIGURE B
EVOLUTIONTM Conserver
Top View
Oxygen
Pressure
Gauge
Cylinder
Adjustment
Handle
Selector
Knob
Low Battery
Indicator Light
FIGURE D
EVOLUTIONTM Conserver
Bottom View
9
Oxygen Supply
Outlet
OXYGEN INLET
CONNECTION
Seal Washer
FIGURE C
EVOLUTIONTM
Conserver
Side View
Battery
Holder
Cylinder
Alignment
Pins
Selector
Button

• Low Battery Indicator Light: The EVOLUTION
TM
conserver incorporates a visual indicator light that alerts you when a battery
change is needed. The following signal will be displayed as your batteries become depleted:
Blinking red light - Low battery energy level. Replace batteries.
• Cylinder Adjustment Handle: This is used to attach the unit to any CGA 870 post-valve cylinder.
• Selector Knob: This enables the user to select their prescribed oxygen flow setting. It also enables s/he to select the
continuous flow mode setting. The continuous flow mode setting (CF) is designed for emergency use only. The amount of
oxygen delivered when using the EVOLUTION
TM
in continuous flow mode is preset at 2 LPM (liters per minute). When not in use,
the cylinder should be turned off by turning the cylinder valve toggle counter clockwise.
The CF mode (continuous flow) is a mechanical override designed as a safety feature in case battery power fails. It is set at
2 LPM CF. When in the CF mode, the user can still change the LED display lights by pressing the Selector Button but it has no
effect on oxygen output.
CAUTION! In the event that it is necessary to operate the unit in the continuous flow mode, DO NOT obstruct the flow of oxygen
from the Oxygen Supply Outlet by placing your finger over the outlet or blocking the flow through the oxygen tubing in any way.
Doing so may render the unit inoperable and/or damage the sensor in the unit.
☛NOTE: Remember that in continuous flow mode, the oxygen will be consumed at a much faster rate.
Return to another source before depleting the oxygen cylinder.
• Battery Holder: This compartment holds two (2) AA-size alkaline batteries.
• Oxygen Pressure Gauge: This enables the user to monitor the contents of the compressed oxygen cylinder.
• Oxygen Supply Outlet: Use this fitting to attach a standard cannula.
• Cylinder Alignment Pins: When assembling the unit, these parallel pins must go into the holes on the post valve.
• Seal Washer: This creates the interface between the valve and the EVOLUTION
TM
conserver. Besides offering a rugged
interface, it also surrounds the oxygen path in a ring of stainless steel or brass.
Oxygen Inlet Connection: Interface between cylinder valve and conserver that allows oxygen to flow into the regulator.
WARNING! Use only a manufacturer-specified seal washer. Other seal washers may not be oxygen
compatible and may cause an oxygen leak, creating an increased fire risk.
DESCRIPTION OF PARTS & CONTROLS
10

11
ASSEMBLY AND USE
• Make certain that your hands are free of oil, grease, and other contaminants.
• Inspect the unit to insure that it has a manufacturer-specified seal washer in good working
condition attached to the inlet nozzle.
• Secure the cylinder in an upright position.
• Inspect the post valve of the cylinder and the EVOLUTIONTM conserver to ensure they are free
of contaminants. If any indication of damage or contamination is detected, DO NOT use the
equipment and contact your Home Care Provider.
WARNING! Use ONLY a manufacturer-specified seal washer. Other seal washers may not be
oxygen compatible and may cause an oxygen leak, creating an increased fire risk. Do not use the
device if the manufacturer-specified seal washer is missing. Contact your Home Care Provider for
assistance.
NON-PORTABLE USE:
The EVOLUTIONTM conserver is designed to extend the life of portable oxygen supplies when
away from the primary source. While the EVOLUTIONTM conserver may be used with stationary
oxygen cylinders, it should only be used while awake and reasonably attentive. The EVOLUTIONTM
conserver is not intended for use during sleep because, in the unlikely event of operational
malfunction or dislodging of the cannula, the user could be unaware and not make the necessary
corrections.

12
INSTALLING ALKALINE BATTERIES
The EVOLUTIONTM conserver uses advanced technology that prolongs battery life through efficient
power use. With normal use of four (4) hours per day at any setting, your batteries should last a
minimum of 2 years.
Two (2) AA alkaline batteries are packaged in the box with your EVOLUTIONTM conserver. Follow
these easy steps to install them:
STEP 1: While holding the unit in one hand, gently press down on the battery door with your
thumb and open the hinge door away from the EVOLUTION™ label. [Fig E1 and E2]
STEP 2: Drop the batteries into the slot, making sure they are inserted in the proper direction as
indicated by the (+) and (-) symbols. [Figs E3]
STEP 3: Rotate the door cover back in place until a “click” is heard.
ASSEMBLY AND USE
FIGURE E1 FIGURE E2 FIGURE E3
Changing
Alkaline
Batteries
☛ NOTE: The EVOLUTIONTM conserver is packaged with batteries inside. A special seal is used at the positive
terminal to prevent battery oxidation. If it has not already been removed by your Home Care Provider, be
sure to remove the seal before using the unit for the first time.

ASSEMBLY AND USE
MONITORING BATTERY ENERGY LEVEL:
The EVOLUTIONTM conserver is equipped with a low battery indicator light that alerts you when
a battery change is needed. The following signal will be displayed as your batteries become
depleted: Blinking red light – Low battery energy level. Replace batteries.
Disposal of Batteries: Do not dispose of used batteries in the household waste. Contact a public
waste disposal authority for proper disposal instructions.
INSTALLING THE SYSTEM:
STEP 1: Loosen the cylinder adjustment handle.
STEP 2: Lower the EVOLUTIONTM conserver over any CGA 870
post-valve cylinder with the alignment pins toward the holes on
the cylinder neck [Fig. F].
STEP 3: Align the two (2) pins and seal washer with the corresponding
holes on the cylinder post valve.
STEP 4: While holding the unit in place, tighten the cylinder adjustment
handle by turning clockwise [Fig. F].
☛ NOTE: Tighten only by hand. The use of a tool to tighten the handle
may damage the unit.
CAUTION! If you are unable to eliminate leaks by manually tightening the
cylinder adjustment handle, replace the seal washer. If leaks persist, the unit must be returned for
service.
STEP 5: Attach a standard cannula to the oxygen supply outlet. See page 14 for an illustration
demonstrating the proper positioning of the nasal cannula.
FIGURE F
Attaching the EVOLUTIONTM
conserver to the cylinder
13

14
ASSEMBLY AND USE
OPERATING INSTRUCTIONS:
STEP 1: Make sure the EVOLUTIONTM conserver is set to the “PULSE” position. Battery saving
technology has eliminated the need for an “OFF” position. The unit will go to “Sleep Mode”
after three minutes of non-use. The unit will turn on again when an inspiration is detected
or the Selector Button is pressed.
STEP 2: To reduce the risk of rapid oxygen recompression and fire, OPEN THE CYLINDER VALVE
SLOWLY and completely so that the pressure gauge moves slowly as it indicates the
cylinder pressure.
STEP 3: Listen for leaks. If a leak is present, close the cylinder valve, check the seal washer, and
reinstall. If the leak persists, DO NOT USE THE EQUIPMENT. Contact your supplier for repair.
STEP 4: To select the setting on the EVOLUTIONTM conserver (1-7) that corresponds to the appropriate
delivery setting, press and hold the Selector Button in the center of the Selector Knob until the
appropriate LED display light is illuminated.
☛ NOTE: To check your current setting, press and release the Selector Button in the center of the Selector Knob
STEP 5: Place the nasal cannula into position with the prongs in the nostrils and begin breathing.
[Fig. G] The EVOLUTIONTM conserver will now start to deliver oxygen. The amount of
oxygen delivered is determined by the setting. Adequate oxygen delivery will be achieved
because of the precise time in the breathing cycle that the pulse of oxygen is delivered.
☛ NOTE: To help prevent possible damage to the unit, keep the EVOLUTIONTM conserver in
a carrying bag. Several bags are available for use with different cylinder sizes and
configurations.
STEP 6: When finished using the system, turn off the oxygen supply cylinder
valve and continue breathing through the nasal cannula until no
further oxygen is detected.
STEP 7: Remove the nasal cannula.
STEP 8: When not in use, store in a clean, dry location. Fig. G
Proper Positioning of
Nasal Cannula

M2 36 liters 3.0 1.5 1.0 0.8 0.6 0.5 0.4 0.3
M4(A) 113 liters 9.4 4.7 3.1 2.4 1.9 1.6 0.7 0.9
M6(B) 164 liters 13.7 6.8 4.6 3.4 2.7 2.3 1.9 1.4
ML6 171 liters 14.3 7.1 4.8 3.6 2.9 2.4 2.0 1.4
M7 198 liters 16.5 8.3 5.5 4.1 3.3 2.8 2.3 1.7
M9(C) 246 liters 20.5 10.3 6.8 5.1 4.1 3.4 2.9 2.1
D 425 liters 35.4 17.7 11.8 8.9 7.1 5.9 5.0 3.5
E 680 liters 56.7 28.3 18.9 14.2 11.3 9.4 8.1 5.7
15
OXYGEN CYLINDER DURATION
Because the total delivery of oxygen via the EVOLUTIONTM conserver is related to breathing rates,
it is user adaptive in that the total oxygen delivered per minute will automatically adjust with user
need, as expressed by increased or decreased breathing rates. For example, at all settings, twice as
much oxygen per minute will be delivered if one breathes twenty (20) times per minute as compared
with ten (10) times per minute. The table below provides useful information to be used as a guide.
SETTING 1 2 3 4 5 6 7 Continuous
Flow
2 LPM
CYLINDER TYPE CYLINDER VOLUME Estimated Cylinder Duration in Hours
(Based on 20 breaths per minute)

16
CARE AND MAINTENANCE
The EVOLUTIONTM conserver is designed for a long and accurate life; however, as with any electronic
device, prudent care is required. The unit should be kept clean and free from moisture and dust, as
well as extreme temperature. Do not expose the unit to water, such as when bathing or swimming.
It is advisable to keep the device in a carrying bag to afford a degree of protection.
HYGIENIC PREPARATION
The unit and its accessories must be hygienically prepared at regular intervals. Also carry out a
functional check after the hygienic preparation (see “Functional Check” on page 18).
INTERVALS
The unit and its accessories must be cleaned at the intervals listed below. We also recommend
carrying out disinfection at these intervals. Please refer to the instructions supplied with the
disinfectant used. You are advised to use suitable gloves for disinfection work (e.g. household or
disposable gloves).
INTERVAL COMPONENT CLEANING DISINFECTION
As required Case/Fittings Wipe down Wipe disinfection
with a lint-free cloth
As required Carrying Bag Hand wipe using warm Wipe disinfection
water and mild soap

17
CARE AND MAINTENANCE
PROCEDURE
Carry out hygienic preparation of the unit and accessories as described on page 16. We
recommend using a 0.5% TERRALIN solution for wipe disinfection. Follow the instructions
enclosed with the disinfectant.
WARNING!
• Take special care that no liquids enter the unit, as this may cause damage.
• You should under no circumstances use a cleaning agent. Cleaning agents containing alcohol or
grease pose a fire risk in combination with compressed oxygen.
• Pay special attention to the oxygen inlet and outlet to make sure they remain free of dust, etc. If
the oxygen inlet connection becomes contaminated with dirt, oil, or grease, DO NOT USE OR
ATTEMPT TO CLEAN. Contact your supplier for service or repair.
CAUTION!
• The carrying bag must never be washed in a washing machine, spin-dried or dried in a laundry
drier.
☛ NOTE:
• You are advised to use suitable gloves (e.g. household or disposable gloves) for disinfection
work.
• When cleaning your carrying bag, be careful not to scrub the plastic window and do not
roughen the seams. Repeat cleaning, if necessary. Hang the bag in a well-ventilated area and
allow to air dry. Do not hang in direct sunlight, as this may cause its external fabric to fade.
PATIENT CHANGE
Carry out a wipe disinfection on the unit’s surfaces before you hand the unit over to a new patient.

18
CARE AND MAINTENANCE
FUNCTIONAL CHECK
CHECKING FOR LEAKS
1. Close the valve on the oxygen cylinder.
2. Depressurize the EVOLUTIONTM by inhaling several times using the nasal cannula. The gauge
indicator should drop to zero.
3. Check that all screwed unions and tube connections are tight. If necessary, tighten them by hand.
☛NOTE: Do not use a tool.
4. Ensure that the unit is set to the “PULSE” position.
5. Slowly open the valve on the oxygen cylinder until the needle in the gauge indicator no
longer moves.
6. Close the cylinder valve again.
7. Observe the needle in the gauge indicator for approximately one minute.
• If the needle remains in its position, everything is OK.
• However, if the contents indicator shows a continuous decrease in pressure, there is a leak in
the system. In this event, contact your Home Care Provider.
DISPOSAL
The Unit: Do not dispose of the unit in the household waste. Consult an authorized electronic waste
recycling company for the proper disposal of the unit.
Disposal of Batteries: Do not dispose of used batteries in the household waste. Contact a public waste
disposal authority for proper disposal instructions.

STANDARD PRODUCT
ORDER NUMBER DESCRIPTION
OM-900 Standard EVOLUTIONTM with CGA 870 Connection
SPARE PARTS
ORDER NUMBER DESCRIPTION
RP-3040 Black “S” Cylinder Adjustment Handle
FR-870G Seal Washers (U.S. Only), bag of 10
ACCESSORIES
ORDER NUMBER DESCRIPTION
OP-150-800 3-in-1 carry bag, fits M4, M6, M7, and M9 cylinders
OP-150T Horizontal carrying tote, fits M4, M6, M7 and M9 cylinders
☛ NOTE: Only manufacturer-specified seal washers may be used with the EVOLUTIONTM conserver. These
accessories are available from your Home Care Provider.
19
PRODUCTS, SPARE PARTS, ACCESSORIES