RWD R640-S1 User manual

R640-S1 Flexible
User Manual V1.1
Veterinary Anesthesia Machine

© 2019 Shenzhen RWD Life Science Co., Ltd,All rights reserved.
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Science Co., Ltd (hereinafter referred to as the RWD), including but not limited to patent,
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Statement
RWD reserves the right to modify the content of this manual without prior notice.
RWD reserves the right to change the technology without prior notice.
RWD reserves the right to modify the product specifications without prior notice.
RWD is not to guarantee the information in any forms, including (but not limited to) the guarantee
responsibility of proposing the implied merchantability and suitability for a specific purpose.
RWD only in the following conditions is considered to be responsible for the safety, reliability and
performance of the instruments, i.e.:
Assembly operation, expansion, adjustment, improvements and repairs were carried out by RWD
authorized personnel;
Relevant electrical equipments in line with national standards;
The instrument is operated according to the instruction manual.
RWD is not responsible for the products’ safety, reliability and operation status in the following
conditions:
Components are disassembled, stretched and debugged;
Non RWD authorized personnel repairs or alterations to the instruments;
Product using not in accordance with the manual.

Contents
1-Introduction ...................................................................................................... 1
1.1 Overview.......................................................................................................................... 1
1.2 Safety............................................................................................................................... 1
1.3 General description ......................................................................................................... 1
1.4 Product features.............................................................................................................. 1
1.5 Facility requirements....................................................................................................... 2
1.6 System standard features................................................................................................ 2
2-Safety ................................................................................................................ 6
2.1 Overview.......................................................................................................................... 6
2.2 Intended use.................................................................................................................... 6
2.3 Description of safety symbols ......................................................................................... 6
2.4 Basic safety precautions and practices............................................................................ 6
2.4.1 Animal and operator safety....................................................................................... 6
2.4.2 Preventing system and facility damage .................................................................... 7
2.4.3 Facility environment health...................................................................................... 7
2.5 System malfunction......................................................................................................... 7
3-Unpacking and assembling................................................................................. 8
3.1 Overview.......................................................................................................................... 8
3.2 Unpacking the system ..................................................................................................... 8
3.3 Assembling the system.................................................................................................... 8
3.3.1 Assembling base....................................................................................................... 8
3.3.2 Assembling main support and vaporizer.................................................................. 9
3.3.3 Assembling CO2 absorber canister (Push the canister to the end of the track)...... 11
3.3.4 Assembling monitor tray and gas filter canister (Optional)).................................. 11
3.3.5 Assembling breathing bag, rebreathing circuit and non-rebreathing circuit .......... 12
4-System setup ....................................................................................................13
4.1 Overview........................................................................................................................ 13
4.2 Materials and supplies................................................................................................... 13
4.3 Initial system preparation ............................................................................................. 13
4.3.1 Setting up the system.............................................................................................. 13
4.3.2 Filling the anesthetic vaporizer............................................................................... 14

5-Operation .........................................................................................................18
5.1 Overview........................................................................................................................ 18
5.2 Pre-use checkout ........................................................................................................... 18
5.3 Anesthesia procedure.................................................................................................... 18
5.4 Using the oxygen flush function.................................................................................... 18
5.5 Using the rebreathing circuit and non-rebreathing circuit ........................................... 19
5.6 Adjusting the highest pressure in system ..................................................................... 19
5.7 Post-anesthesia procedure............................................................................................ 19
6-Troubleshooting ...............................................................................................20
6.1 Overview........................................................................................................................ 20
6.2 Safety............................................................................................................................. 20
6.3 Machine status .............................................................................................................. 20
6.4 Record keeping.............................................................................................................. 20
6.5 Problem –Solution matrix............................................................................................. 20
7-Maintenance ....................................................................................................24
7.1 Overview........................................................................................................................ 24
7.2 Safety............................................................................................................................. 24
7.3 Annual inspection.......................................................................................................... 24
7.4 Machine status .............................................................................................................. 24
7.5 Record keeping.............................................................................................................. 24
7.6 Parts and materials........................................................................................................ 24
7.7 Cleaning the equipment ................................................................................................ 24
7.7.1 Required materials and supplies............................................................................. 25
7.7.2 Weekly maintenance .............................................................................................. 25
7.7.3 Draining the vaporizer............................................................................................ 25
8-Product information .........................................................................................27
8.1 Product warranty........................................................................................................... 27
8.2 Product specifications ................................................................................................... 27
9-Useful information............................................................................................28
9.1 Overview........................................................................................................................ 28
9.2 Pressure equivalents ..................................................................................................... 28
9.3 Pressure unit conversions ............................................................................................. 28
9.4 Minimum alveolar concentration (MAC) anesthetic levels........................................... 28

1
1-Introduction
1.1 Overview
First of all, sincerely thanks for selecting the R640-S1 flexible veterinary anesthesia machine
made by RWD.
Please read this instruction manual and all other auxiliary materials carefully before installing and
using the product, it will be helpful to work with it better.
RWD has been always dedicated to improving the product function and the service quality, and
will reserve the rights to revise the products itself and contents described in the instruction manual
at any time without notice in advance.
If you find the practical situations about the supplied goods do not agree with the contents
described in the manual, or have any questions or ideas about our products and service, welcome
to contact us. For latest information, please visit our web site (http://www.rwdstco.com/) or
contact us immediately.
1.2 Safety
Operation of anesthesia system involves oxygen gas pressure and the use of potentially hazardous
materials. In order to prevent injury to animals or operators and damage to the anesthesia system,
please read Section 2 –Safety carefully before performing any of the procedures contained in this
manual. If you have any safety questions or comments, please contact us for support.
1.3 General description
R640-S1 anesthesia machine is a compact and stable equipment designed by RWD. The principle
is that the anesthetic agent is transformed from liquid to gas and mixed with oxygen according to a
certain proportion for inspiration of animals in order to make them anesthetized.
1.4 Product features
Standard closed circuit breathing loop design;
This veterinary anesthesia system should only be operated by
veterinary professionals qualified to administer anesthesia.
This anesthesia system should be only used for veterinary clinical
and research, NOT used for human clinical.

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Applicable to cats, dogs, monkeys, pigs and other animals of 100kg weight or less;
Two options available: close and semi-open anesthesia mode;
The oxygen flow meter adjustable ranges from 0.1 to 4 L/min;
With oxygen flush function to replace the system with pure oxygen at a speed of
10L/min;
CO2absorbent canister (2100 ml) is installed in the front part of the machine that is
easy to observe and dissemble for changing;
Newly designed vaporizer provides enough flow of anesthetic gas for animal.
Support both Cage Mount and Selectatec.
The concentration of anesthetic gas from the vaporizer can be adjusted from 0 to
5 % (Isoflurane) and 0 to 8% (Sevoflurane), without effect by fluctuation of flux,
temperature, flow rate and pressure. The safety locking device well prevents
accidental volatilization of anesthetic agent;
Compact and easy to clean.
1.5 Facility requirements
Table 1-1 provides the facility requirements necessary to ensure reliable operation and safety of
the anesthesia system.
Table 1-1 Facility Requirements
Specification
Work Environment
Temperature:10℃~35℃
Humidity:15%~95% (non-condensing)
Air pressure:57kPa~106kPa
Storage Environment
Temperature:-20℃~60℃
Humidity:10%~95% (non-condensing)
Air pressure:50kPa~106kPa
1.6 System standard features

3
Figure 1-1 R640-S1 body
No.
Description
No.
Description
1
Main support
7
Pressure gauge (cmH2O)
2
O2 flowmeter
8
O2 flush button
3
Inspiration & expiration valve
component
9
Rebreathing circuit /Non-rebreathing
circuit tube socket
4
Endotracheal tube/ mask connector plug
10
Relief valve
5
CO2 absorbent canister
11
Breathing bag mount
6
Vaporizer
12
Rebreathing circuit connector
○
1 Main support
Solid metal support for assembling of following component.
○
2 O2 flowmeter
Control the oxygen flow rate. Turn the O2flowmeter control valve to regulate the oxygen
flow between 0.1~4 L/min.
○
3 Inspiration & expiration valve module
The one-way valve is made up with floatable discs and nickel-plated brass valve to control
gas flow direction to form gas circulation in system. It makes sure the animal will not
inhale the gas just exhaled. The floatable discs go up and down as animal breaths, and

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operator can confirm the respiratory status with the floatable discs.
○
4 Endotracheal tube/ mask connector plug
Used for placing the endotracheal tube/ mask connector. Meanwhile the plug blocks the
breathing circuit, it’s useful for system leak detection, adjusting system pressure and
flushing circuit.
○
5CO2absorbent canister
The absorbent canister is filled with a granular carbon dioxide absorbent material eg. soda
lime. It uses a coaxial gas flow path to provide for more efficient use of absorbent, while
reducing flow resistance. The chemical reaction that takes place in the canister creates heat
and humidity, which is added to the delivery of anesthesia to the animal.
○
6Vaporizer
The vaporizer is the most complicated and expensive part of the anesthesia system. More
attention should be paid to its maintenance and operation. It converts a liquid anesthetic
agent into a vapor which is added to oxygen. The anesthetic vapor is measured in volume
percent (vol %). A dial on top of the vaporizer allows the operator to select the amount of
vapor administered to the animal. The coiled pipe design inside the vaporizer ensures the
output is not affected by the fluctuation of pressure, temperature and gas flow. The inner
design of the vaporizer is different according to the anesthetic agent. Please use the correct
anesthetic agent following the tag on the vaporizer. The misuse may cause the damage to
the equipment and animal.
○
7Pressure gauge
Measures and displays the pressure of gas mixture in breathing circuit.
○
8O2flush button
Press to deliver the oxygen directly to breathing circuit. It is generally used to flush the
anesthetic gas in system or in emergency.
○
9Rebreathing circuit /Non-rebreathing circuit tube socket
Used for connecting to a non-rebreathing circuit, which is generally applicable to animals
below 7 kg.
○ 10 Relief valve
Operator can determine the inspiratory pressure for ventilating the animal by adjusting the
valve while observing the system’s pressure gauge. When the pressure of gas mixture
exceeds the setting, the gas will be expired through valve to keep the pressure stable.

5
Usually, the outlet of the valve is connected to a gas filter canister.
○
11 Breathing bag mount
Used for connecting to a breathing bag when using the anesthesia system in a rebreathing
circuit configuration.
○
12 Rebreathing circuit joint
Used for connecting to a rebreathing circuit, which is generally applicable to animals over 7
kg.

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2-Safety
2.1 Overview
This section provides basic safety information necessary for operating your R640-S1 anesthesia
system. Please contact us for more support if you have any questions or comments.
2.2 Intended use
The anesthesia system is intended for veterinary use only. All the operation and maintenance
should follow the instructions of this manual.
Misuse of your system may result in injury to animals and operators or damage to property.
Misuse includes:
Using inappropriate gas and anesthetic agents
Making unauthorized modifications to the equipment
Operating the system using gas pressure exceeding maximum ratings
2.3 Description of safety symbols
The following types of symbols are included in this manual with notes that alert the reader to
potential hazards.
2.4 Basic safety precautions and practices
This section provides requirements necessary to ensure safe and reliable operation of your
R640-S1 anesthesia system.
2.4.1 Animal and operator safety
Always keep a backup anesthesia delivery plan in case of an emergency occur.
Any person responsible for the installation or operation of the system should be
thoroughly familiar with this operator’s manual.
To ensure proper function of your system, perform a pre-use checkout procedure in
accordance with Section 4 –System setup and Section 5 –Operation.
The system must always be attended by a veterinarian or trained anesthesia technician.
After guarantee period, annual service inspections to ensure proper operation is
recommended. Only RWD-certified technicians should be permitted to service the
Property Damage Caution. This symbol appears in a shaded text block to
warn you about actions that could cause damage to the system or the facility.
Personal Safety Warning. This symbol appears in a shaded text block
to warn you about actions that could cause personal injury or death.

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system or replace internal parts.
Keep open flames and combustibles (e.g., ether and acetone) away from the anesthesia
system.
Do not place any heavy things on the anesthesia system.
Make sure that the oxygen hose does not cross walkways and aisles. This may present a
tripping hazard.
Wearing personal protective equipments is suggested.
Make sure the oxygen hose is securely connected to the system before starting a
procedure.
Make sure that any exhaled gas containing anesthetic is recovered or vented outside of
the operating room. A waste gas evacuation system must be used.
RWD recommends the use of an electrocardiograph, and equipment capable of
monitoring the animal’s pulse, oxygen (O2) saturation, carbon dioxide (CO2) level, and
anesthetic agent level at all times when operating the system.
Remove the system from service if any indications of improper function exist.
Never pour water or any other fluids into the anesthetic vaporizer. Fill vaporizer only
with the anesthetic agent for which it is designed.
Avoid use of oil or grease on any anesthesia or respiratory equipment where oxygen is
used. An explosion may occur.
2.4.2 Preventing system and facility damage
Immediately contain and clean up spilled anesthetic.
Isoflurane is very caustic and may dull the paint finish of the system if spillage occurs.
If spillage should occur, allow it to evaporate. Do not attempt to wipe it with a cloth.
Do not place heavy on top of the anesthesia equipment.
Follow all recommended system maintenance procedures specified in Section 7 –
Maintenance.
Keep appropriate distance from the wall to ensure a stable gas supply.
2.4.3 Facility environment health
Immediately contain and clean up any spilled anesthetic agent.
If the system is used in a confined space, ensure that there is adequate ventilation.
Dispose of any hazardous materials and items contaminated with hazardous materials
should be in accordance with local regulations.
2.5 System malfunction
If your system does not operate properly, refer to Section 6 –Troubleshooting which includes
Problem descriptions, possible causes, and suggested solutions.

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3-Unpacking and assembling
3.1 Overview
This section provides the unpacking and assembling procedure for your R640-S1 anesthesia
system.
3.2 Unpacking the system
Your system is shipped in boxes that have been carefully packed at the factory for safe delivery of
the system to you. When you receive your system, please do the following:
Check the shipping documents to ensure that all boxes have been received.
Examine the shipping boxes for damage. Immediately make a damage claim to the
carrier if there is serious damage and contact RWD. Taking photos is suggested for
keeping the evidence.
Carefully open each box and remove each individual component. Save all boxes and
packing materials for future shipments.
Check the packing list or invoice to ensure all ordered components ordered are included.
In case there is any doubt or need any help, contact RWD or local dealer immediately.
3.3 Assembling the system
3.3.1 Assembling base
Step1 Step2

9
3.3.2 Assembling main support and vaporizer
Step1 Step2 Step3
An example of the installing method for Cage Mount type vaporizer is showed as below:
Step1 Step2 Step3
Step4

10
An example of the installing method for Selectatec type vaporizer is showed as below:
Step1 Step2 Step3
Step4
The detail picture is shown below (using the Selectatec type as an example, the
Cage Mount type is also applicable):
1.Tube 2.Back elevation 3.Lateral view

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3.3.3 Assembling CO2 absorber canister (Push the canister to the end of
the track)
Step1 Step2
3.3.4 Assembling monitor tray and gas filter canister (Optional))
Step1 Step2 Step3

12
3.3.5 Assembling breathing bag, rebreathing circuit and
non-rebreathing circuit
Rebreathing circuit Non-rebreathing circuit
Switching valve
Connected to the gas recovery tank

13
4-System setup
4.1 Overview
This section describes the preparation of anesthesia machines for animal anesthesia.
4.2 Materials and supplies
Oxygen supply source
Connection tube for oxygen source and flowmeter
Animal breathing circuit
Breathing bag
CO2 absorbent
Anesthetic agent
Wrench for tightening oxygen supply fitting
4.3 Initial system preparation
4.3.1 Setting up the system
1) Position the system in the area where it will be used.
2) Fill the CO2 absorber canister with absorbent as follows:
Loosen the fixing knob and remove the absorber.
Fill the absorbent canister with CO2 absorbent. Do not exceed the maximum
capacity scale.
Reinstall the absorbent canister and tighten the knob.
3) System leak checking
Close all the open end of anesthesia system.
Make sure volume percent dial is on the anesthetic vaporizer to the zero (0)
position.
Close the relief valve completely by clockwise rotating regulator.
Open oxygen source, adjust the needle oxygen regulator between 0.3 to
0.4MPa by clockwise rotating regulator.
Turn on the oxygen flowmeter control valve, increase the flow rate up to 1
L/min. The system pressure will increase with oxygen flowed into system.
Operator can also increase the pressure by pressing oxygen flush button. Turn
Anesthesia system must be operated with no leaks, please
check system according to the following steps.

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off the flowmeter control valve when the needle of pressure gauge goes up to
about 30 cmH2O.
Observe the needle of pressure gauge, there is no leak in the system if the
needle drops down within 2cmH2O in 10s. On the other hand, system leaks if
the needle drops down more than 2cmH2O in 10s, operator needs to check all
the connection in the system. In case there is any doubt or need any help,
contact RWD or local dealer immediately.
4.3.2 Filling the anesthetic vaporizer
User choose different vaporizer, the anesthetic filling method is also different. RWD
supply three kinds of filling type vaporizer-Pour Fill and Easy Fill and Key Fill.
If anesthetic agent spills on system surfaces, allow it to evaporate. Rubbing
spilled anesthetic agent with a cloth may damage the system finish.
Make sure to pour the correct anesthetic agent into the filler port. Filling with
the incorrect anesthetic agent could cause serious injury or death to the animal.

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4.3.2.1 Pour Fill
1)Turn and remove the sealing cap of the vaporizer. Do not leave any debris.
2)Carefully pour appropriate agent into the filler port. Observe the agent level sight
glass on vaporizer. Keep agent level inside tube between the two marks.
3)Tighten the sealing cap.

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4.3.2.2 Easy Fill
1) Turn and remove the sealing cap of
the vaporizer. Check the black
sealing ring.
2) Mount an adaptor onto the isoflurane
bottle, insert into filler port along the
groove, and press it in the end.
3) Observe the agent level sight glass
on the vaporizer. Keep the agent
level inside the tube between the
two marks.
4) Tighten the sealing cap.