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LIMITED WARRANTY REGISTRATION CARD

Please present your Warranty Card and a copy of your original 

sales receipt to validate warranty coverage. DO NOT lose your 

receipt. Please review the terms & conditions of ChoiceMMed 

America Co.’s Warranty.
To obtain full warranty coverage, this card must be completed, 

signed and returned to ChoiceMMed America Co. within 30 days 

from date of purchase. Failure to register this card within 30 days 

may render the warranty null & void.
RETURN ADDRESS: ChoiceMMed America Co. 2558 Pearl 

Buck Rd, Suite 8A, Bristol, PA 19007

Service Phone: (215) 874-0458

Customer Service Representatives are available 

Monday through Friday - 8:30am to 4:30pm EST

STATEMENT OF CHOICEMMED AMERICA CO. / LIMITED 

WARRANTY

ChoiceMMed America Co. warrants to the original purchaser 

that this equipment will be free from defects in materials and 

workmanship for a period of two years from the date of purchase. 

This warranty shall be limited to the repair adjustment and/or 

replacement at the manufacturer's option of defective parts free of 

charge except the cost of transportation to ChoiceMMed America 

Co. Manufacturer's responsibility is limited to actual cost of item. 

When returning equipment for warranty service, all shipping and 

insurance charges must be prepaid and the proof of purchase 

must be enclosed. A payment of $10.00 must be included to 

cover the return shipping and handling. Returns will only be 

shipped to locations within the USA. ChoiceMMed America 

Co. will not be responsible for expenses or inconveniences, or 

consequential damages occasioned by equipment or by breach 

of any expressed or implied warranty with respect thereto.

For troubleshooting assistance please contact Consumer 

Support. Our representatives are trained to provide you 

assistance over the phone and may be able to resolve your 

problem without returning. For the best possible assistance 

please have your unit available when calling us.

Limitations

This warranty covers all defects encountered in normal use of the 

equipment and does not apply in the following cases.

1) If the equipment has been serviced by other than a certified center.

2) Damage to the equipment due to mishandling, abuse, accident or 

not following operating instructions.

3) INSTRUMENTS: Warranty does not extend to display face, 

batteries, carrying case or lanyard.

ChoiceMMed America Co.

2558 Pearl Buck Rd, Suite 8A, Bristol, PA 19007

MODEL NO.

SERIES NO. (SN)               

DESCRIPTION
PURCHASE DATE

CUSTOMER NAME (MR.   MRS.   MS.   )

PHONE NUMBER

MAILING ADDRESS 

CITY/STATE

ZIP  

1. General Description

Thank you for purchasing OxyWatch C20 pulse oximeter. This oximeter 

can be used to measure your blood oxygen saturation (in % SpO2) and 

your pulse rate. It should be used for spot monitoring only and not for 

continuous monitoring.
The OxyWatch C20 Finger-Unit spot check oximeter is only for sports 

and aviation use. It is ideal for use during sports activities, mountain 

climbing and piloting airplanes. It is not intended to diagnosis any 

medical condition or to be used in medical applications.

2. Package Contents

1. OxyWatch C20 Pulse Oximeter
2. Lanyard
3. User Manual
4. Carrying Pouch
5. 2 AAA Batteries

1. Read the manual carefully before use.
2. Pulse oximeters are sensitive to motion artifacts. Keep hands still 

while taking a reading.

3.  Pulse oximeters require sufficient blood flow to obtain proper readings. 

Poor blood circulation can result in inaccurate readings. If your hands 

are cold or you have poor circulation, warm your hands by rubbing 

them together or use another method before attempting to obtain a 

reading. A tourniquet, blood pressure cuff or other blood flow 

hindrances may also result in inaccurate readings.

4. Fingernail polish or acrylic nails obstruct the light transmission and 

may also result in inaccurate readings.

5. Your finger must be clean for a proper reading.

6. The pulse oximeter must be clean for a proper reading.

7.  If a reading is difficult to obtain, switch to another finger or to the other hand.

8.  There are a number of other conditions which may lead to an 

 inaccurate reading including but not limited to recent medical tests that 

included an injection of dyes, use of arterial catheters, a weak pulse, 

low levels of hemoglobin in the blood, low perfusion (the quality of 

your pulse), elevated levels of dysfunctional hemoglobin, the strength 

and type of light that you are in while using the pulse oximeter and the 

existence of cell phones, radios, and fixed transmitters within certain 

ranges of the pulse oximeter during use.

9. The pulse oximeter will not alert you if your readings are out of 

normal range.

10. Explosion hazard: Do not use the pulse oximeter in an explosive 

atmosphere. 

11. The pulse oximeter has no SpO2 alarms; it is not for continuous 

monitoring, as indicated by the symbol. 

3. Precautions for Use

NOTE: 

Install the batteries in right polarity. Incorrect placement may 

cause damage to the bracket.

NOTE: 

Remove the batteries if the pulse oximeter will not be used for 

long periods of time.

3.  The battery indicator symbol on the front panel display will light when 

the battery voltage is too low for normal operation of the pulse oximeter. 

Replace the batteries when indicator symbol lights.

5. Using the Oximeter

3.  Press the switch button one time on front panel to turn the pulse oximeter on.

1. Open the clamp as shown in the picture. 

2. Place one of your fingers into the rubber 

opening of the pulse oximeter (your finger

should touch the bottom portion) before 

releasing the clamp.

1. Install two AAA batteries 

into the battery compartment. 

Match the plus (+) and minus 

(-) signs in the compartment. 

If the polarities are not 

matched, damage may be 

caused to the oximeter.

2. Slide the battery door cover 

horizontally along the arrow 

as shown in the picture.

4. Battery Installation

2. Significant levels of dysfunctional hemoglobin (such as carbonxy-

     hemoglobin or methemoglobin).

3. Intravascular dyes such as indocyanine green or methylene blue.

4. SpO2 measurements may be adversely affected in the presence of 

high ambient light such as direct sunlight. In bright light conditions, 

cover the sensor area if necessary.

5. Excessive user movement.

6. High-frequency electrosurgical interference and defibrillators.

7. Venous pulsations.

8. The user has hypotension, severe vasoconstriction, severe anemia or 

hypothermia.

9. Fingernail polish or false fingernails may cause inaccurate SpO

readings. 

1.  Autoclaving, ethylene oxide sterilizing or immersing the sensors in liquid.

In addition to items described in the Precautions for Use, inaccurate 

measurements may be caused by FACTORS INCLUDING BUT NOT 

LIMITED TO:

Slide  Cover            

7. Brief Description of Front Panel

The height of the Pulse Bar graph indicates the intensity of the pulse and 

signal strength. The bar should be greater than 30% for a proper reading.

Pulse Bar Graph

Low Power Indicator

6. Maintenance

1. Clean the pulse oximeter and sensor with a soft cloth dampened with 

isopropyl alcohol. Do not pour or spray any liquids onto the pulse 

oximeter. Do not allow any liquid to enter any openings in the device. 

Allow the pulse oximeter to dry thoroughly before reusing. 

(The rubber inside of the pulse oximeter is composed of medical 

grade rubber. It is non-toxic and is not harmful to the skin.)

2. The pulse oximeter requires no routine calibration or maintenance 

other than replacement of the batteries.

4. Keep your hands still for the reading. Do not shake your finger during 

the test. It is recommended that you do not move your body while 

taking a reading. 

5. Read the data from the display screen.

7. When you press the power switch for more than one second, the 

brightness of the pulse oximeter will be changed by degrees. There 

are 10 levels of brightness. The default level is level four.

8. When no signal or low signal is detected, the pulse oximeter will 

power off automatically in 8 seconds. 

6. There are four display modes. After turning on the pulse oximeter, 

each time you press the power switch, the pulse oximeter will switch 

to another display mode. 

8. Technical Specifications

1. Display: 

OLED display 

PR display mode: bargraph 

Low power indication:  

2. Battery Standard:

 Two AAA 1.5V Alkaline Batteries

3. Power Consumption: 

Less than 40mA

4. Resolution: 

±1% for SpO2 and ±1 BPM for Pulse Rate

5. Measurement Range: 

Measuring range for SpO2: 70-100% 

Measuring range for PR: 30-250 BPM

6. Measurement Accuracy: 

SpO2

: 70-100%, ±2 digits; <70%, no definition

PR: 30~99 BPM, ±2 BPM; 100~250 BPM, ±2%

7. Environment Requirement:

Operation Temperature: 5°C~40°C (41°F~104°F)

Storage Temperature: -20°C~55°C (-4°F~131°F)

Ambient Humidity: ≤80%, no condensation in operation

≤93%, no condensation in storage 

8. Automatic Power Off:

  The oximeter will power off automatically after 

8 seconds when the finger is removed.

9.

It is recommended that the product be kept in a dry place. A damp 

ambient might affect its lifetime and even might damage the product.

10. Declaration

 

EMC of this product complies with IEC60601-1-2 standard
The materials which users can come into contact with are non-toxic 

and comply with ISO10993-1, ISO10993-5 and ISO10993-10.

Note: 
The illustration used in this manual may differ slightly from the 

appearance of the actual product.

   Warnings:

9. Possible Problems and Resolutions

SpO2 or PR 

is shown 

unstably.

1. Finger might not be plugged 

deep enough.

2. Finger is trembling or user’s 

body is in movement status.

1. Retry by plugging the 

finger.

2. Try not to move.

The pulse 

oximeter 

cannot be 

powered 

on.

1. The batteries might be 

installed incorrectly.

2. The batteries' power might be 

inadequate or not be there 

at all.

3. The pulse oximeter might be 

damaged.

1. Please reinstall the 

batteries according 

to the polarity

marked inside the

battery compartment.

2. Please replace the 

batteries.

3. Please contact 

our customer service 

center.

“Error3,” 

“Error4” 

and “Error7” 

displayed 

on screen.

The product is damaged.

Please contact our 

customer service center.

SpO2 or 

PR is not 

shown 

normally.

Problems

Possible Reason

Solution

1. Finger is not plugged correctly.

2. User’s oxyhemoglobin value 

is too low to be measured.

1. Retry by plugging 

the finger.

2. Possible pulse 

oximeter failure.

10.

Symbol Definitions

Symbol

Definition 

Pulse Rate (bpm)

Low Power Indication

Serial Number

Oxygen Saturation

SN

SpO

2%

PR

bpm

1.  Keep the pulse oximeter away from young children. Small parts such as 

     the battery door and the batteries, etc., may be hazardous if swallowed.
2. The lanyard may cause strangulation in conditions that may cause it to 

   twist around the neck.

 

Warnings:

Revised Date: March 12, 2013

Guidance and manufacturer’s declaration – electromagnetic 

emissions – for all EQUIPMENT and SYSTEMS

         

 Emission test

   

Compliance

   

Electromagnetic environment – guidance

Guidance and manufacturer’s declaration – electromagnetic emission

RF emissions

CISPR 11

Group 1

Class B

RF emission

CISPR 11

The pulse oximeter uses RF energy only 

for its internal function. Therefore, its RF 

emissions are very low and are not likely to 

cause any interference in nearby electronic 

equipment.
The pulse oximeter is suitable for use in 

all establishments, including domestic 

establishments and those directly 

connected to the public low-voltage power 

supply network that supplies buildings 

used for domestic purposes.

The pulse oximeter is intended for use in the electromagnetic environment 

specified below. The customer or the user of the pulse oximeter should 

assure that it is used in such an environment.

Distributed by: 

ChoiceMMed America Co.

US Customer Service Site

ChoiceMMed America Co.

2558 Pearl Buck Rd: Suite 8A

Bristol, PA 19007

Phone: (215) 874-0458

www.choicemmedamerica.com

ChoiceMMed America Co. 
© 2013 ALL RIGHTS RESERVED 

OxyWatch C20

1. Follow local ordinances and recycling instructions regarding disposal or

recycling of the device and device components, including batteries.

Note:

2. The illustration used in this manual may differ slightly from the

appearance of the actual product.

PR

Power Switch

Pulse Bar Graph

SpO2

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