Blood Pressure Monitor

Blood Pressure Monitor
Digital Wrist
Blood Pressure Monitor
Bilingual Instruction Guide – MODEL UB-521CN
English • Franç ais
important information
Please read this important information before using your monitor.
Please remember that only a medical practitioner is qualified to
interpret your blood pressure measurements. Use of this device
should not replace regular medical examinations.
Have your physician review your procedure for using this device.
He or she will want to verify blood pressure measurements before
prescribing or adjusting medications.
Consult your physician if you have any doubt about your readings.
Should a mechanical problem occur, contact A&D Medical.
Make sure to use the correct cuff size when measuring your blood
Make sure to follow instructions when measuring your blood
pressure to ensure accurate results.
Do not attempt to service, calibrate, or repair this monitor.
Clean the monitor and cuff with a dry, soft cloth or a cloth
dampened with water and a mild detergent. Never use alcohol,
benzene, thinner or other harsh chemicals to clean monitor or cuff.
Remove and replace batteries if monitor is not used for more than
six months. Alkaline batteries recommended.
Because your UB-521CN monitor contains delicate, high-precision
parts, avoid exposing it to extremes in temperature or humidity
or to direct sunlight, shock and dust. A&D Medical guarantees the
accuracy of this monitor only when it is stored and used within the
temperature and humidity ranges noted on page E-16.
The UB-521CN is designed to be used at home, by those who are eighteen
(18) years and older, to monitor blood pressure (systolic and diastolic) and
pulse rate.
Fast. Easy. Accurate.
Congratulations on purchasing a state-of-the-art
LifeSource® blood pressure monitor—one of the most
technologically advanced monitors available today.
Designed for ease of use and accuracy, this monitor
will facilitate your daily blood pressure regimen.
Physicians agree that daily self-monitoring of blood
pressure is an important step individuals can take
to maintain cardiovascular health and prevent the
serious consequences associated with undetected and
untreated hypertension.
A&D Medical has been manufacturing high quality
healthcare products for over 20 years. We are committed to providing you and your family with monitoring devices that provide the utmost in accuracy and
WHAT DISPLAY SYMBOLS MEAN. . . . . . . . . . . . . . . . . . . . . . . . . E-2
MONITOR COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
HOW UB-521CN WORKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
BEFORE YOU START. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
TAKING YOUR BLOOD PRESSURE. . . . . . . . . . . . . . . . . . . .
E-5 - E-6
WHAT IS AN IRREGULAR HEARTBEAT . . . . . . . . . . . . . . . . . . . . . E-7
ABOUT Cuff inflation meter. . . . . . . . . . . . . . . . . . . . . . . . . . E-7
ABOUT average reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
ABOUT PRESSURE RATING INDICATOR™. . . . . . . . . . . . . . . . . . . E-8
ABOUT MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
ABOUT BLOOD PRESSURE. . . . . . . . . . . . . . . . . . . . . . .
E-10 - E-14
troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e-15
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-16
CONTACT INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17
INSTRUCCIONES EN franÇais. . . . . . . . . . . . . . . . . . . . . . . . . . F-1
LifeSource - Designed for Life.
Display Symbol
Recommended Action
The symbol shown while
measurement is in progress. It
blinks while detecting the pulse.
Measurement is in progress,
remain as still as possible.
An irregular heartbeat or body
movement may have occurred.
Refer to page E-7 for more
information on irregular heartbeats.
Take measurement again and
consult with your physician.
Previous measurement stored in
Battery Full
Battery Low
The battery power indicator during
The batteries are low when it
Replace all batteries with
new ones when the symbol
blinks. Alkaline batteries
Unstable blood pressure due to
excessive body movement.
Try the measurement again.
Remain very still during the
The systolic and diastolic values are
within 10 mmHg of each other.
Fasten the cuff correctly, and try
the measurement again.
The pressure value did not increase
during inflation.
Check for air leaks along the
tube and around the air socket.
The cuff is not fastened correctly.
Refasten the cuff and retake
There is an air leak in the cuff or
Make sure tube is properly
connected to cuff and monitor.
Try the measurement again.
The pulse is not detected
correctly. The symbol will appear Remain very still during the
on the pulse display area.
Cuff Inflation Meter
Measurement is in progress,
remain as still as possible
Pressure Rating Indicator™
Refer to the section “About
Pressure Rating Indicator” for
further explanation.
LifeSource Health Line (Toll-Free): 1-888-726-9966
Pulse rate
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
LifeSource® Blood Pressure Monitors are easy to use, accurate and display
clear digital measurements. Our technology is based on the “oscillometric
method”. The term “oscillation” refers to the measure of vibrations caused
by the arterial pulse and is a non-invasive method to determine blood
Tips for Blood Pressure Monitoring:
Our monitors examine the pulsatile pressure generated by the arterial wall
as it expands and contracts with each heartbeat against the monitor’s cuff.
This monitor measures your blood pressure while the cuff is inflating.
before you start
Relax for about 5 minutes before measurement.
Do not smoke or ingest caffeine at least 30 minutes prior to
Remove constricting clothing and place cuff on bare wrist.
Unless your physician recommends otherwise, use left arm
to measure pressure.
Do not talk during measurement.
Do not cross legs. Keep your feet flat on floor during
Now you are ready. Follow these simple steps:
The UB-521CN provides accurate readings on wrists with a circumference
between 5.3" and 8.5" (13.5 cm and 21.5 cm).
The unit requires two "AAA" (1.5 volt) batteries to operate (alkaline
batteries recommended). To install batteries (or to replace when "Low
Battery" symbol appears), proceed as follows:
1. Slide the battery cover as shown to remove from the device.
2. Insert batteries into designated areas ensuring a correct match with
1. Sit comfortably in a chair near a flat surface.
2. With palm facing upward, attach monitor to the
inside of your left wrist and fasten securely. The top
edge of the cuff should align with the crease of your
3. Position your wrist so it is level with your
heart, using an arm rest if needed. Positioning
of the wrist at heart level is critical for accurate
positive (+) and negative (-) terminals.
3. Return battery cover by sliding back on to monitoring device.
NoTE: Rechargeable batteries will not work with this monitor.
4. Press the START button. Your average blood
pressure reading will appear with the number
of measurements stored in memory (i.e. A25 = total of 25
measurements stored in memory). As the cuff pressurizes,
measurement will begin and the Cuff Inflation Meter will
show on the display screen. It is normal for the cuff to feel
very tight.
NoTE: To stop inflation at any time, press START
5. Remain still and refrain from talking or moving during reading.
LifeSource Health Line (Toll-Free): 1-888-726-9966
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
WHAT IS AN Irregular HeartBeat
6. As the cuff is inflating, the
will appear to indicate that the
measurement is in progress. The monitor measures your blood
pressure while the cuff is inflating, so remain still. Once the pulse is
detected, the symbol will flash with each pulse beat.
7. When measurement is complete, the systolic and
diastolic pressure and pulse rate readings are
displayed. The cuff will automatically deflate
completely, releasing any remaining air.
8. Press either START button once to turn off power.
The UB-521CN Blood Pressure Monitor provides a blood pressure and
pulse rate measurement even when an irregular heartbeat occurs. The
Irregular Heartbeat symbol
will appear in the display window in
the event an Irregular Heartbeat has occurred during measurement. An
irregular heartbeat is defined as a heartbeat that varies by 25% from the
average of all heartbeat intervals during the blood pressure measurement.
It is important that you relax, remain still and refrain from talking during
NoTE: We recommend contacting your physician if you see this
symbol frequently.
The device has an automatic power-down feature
which turns off power automatically one minute
after measurement is obtained.
For the most useful blood pressure history, we recommend that you record
the date and time after each measurement. The most accurate history
relies not on a single or sporadic readings, but on a consistent monitoring
pattern over time.
NoTE: If you wish to take your blood pressure measurement again, relax and wait 5-10
minutes to enable the flow of blood in the arm to return to normal.
About cuff inflation METER
The Cuff Inflation Meter is located on the left side of the display screen
to tell you when the blood pressure monitor is inflating the cuff. The Cuff
Inflation Meter moves up during inflation.
Inflation in Progress
Measurement Displayed
NoTE: If you have poor blood circulation in winter (especially when your hands and
wrists are cold), you may not get a blood pressure measurement.
NoTE: The motor will inflate the cuff at a slow speed starting at 20mmHg to begin the
blood pressure measurement process.
LifeSource Health Line (Toll-Free): 1-888-726-9966
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
About Memory
About Average Reading
The UB-521CN provides an average blood pressure reading
based on the total measurements stored in memory. When
taking a measurement, the average blood pressure reading
will appear and the number of measurements stored in
memory will flash several times before the cuff begins
to inflate. The average blood pressure reading will also
appear briefly when you recall the measurements stored in
The UB-521CN automatically stores up to (90) blood pressure and pulse
measurements in its memory. Measurements stored in memory are
assigned an index number in the order of the newest to the oldest. The
oldest reading displays as "n01".
To retrieve readings, follow these simple steps:
1. When the display screen is blank, press and hold the
START button. While holding down the START button,
you will see the average reading displayed first. You
will then see the memory index number (e.g. n04) of
the most recent reading followed by the measurement.
Release the START button when you see the memory
index number.
number of measurements stored in memory
About Pressure Rating Indicator™
The Pressure Rating Indicator™ is a feature
which provides a snapshot of your blood pressure
classification based on your measurements.
This will let you quickly know what your blood
pressure readings mean. Each segment of the bar
indicator corresponds to the Seventh Report of the
Joint National Committee (JNC7) on Prevention,
Evaluation and Treatment of High Blood Pressure
from the National Heart, Lung and Blood Institute
- May 2003. For a more detailed look at this blood
pressure classification, please refer to “Assessing
High Blood Pressure” on page E-11.
2. The display will shut off automatically a few seconds
after all of the readings are displayed. To turn off the
monitor at any time, press the START button.
3. The display will shut off automatically a few seconds
after the readings are displayed.
If there are no measurements stored in memory, two 0s
displayed vertically followed by a blinking "A00"
To clear the measurement history from memory,
remove the battery from the unit and then place the
battery back into the battery holder.
NoTE: Memory will be lost if batteries become low or are removed.
:The indicator displays a segment, based on the current measurement,
corresponding to the JNC7 Classification.
NoTE: Due to other risk factors (e.g. diabetes, obesity, smoking, etc.) in addition to your
blood pressure measurement, the Pressure Rating Indicator is approximate. Please consult
with your physician for interpretation and diagnosis of your blood pressure measurements.
NoTE: Residents outside of the United States (e.g.. Canada and Mexico) should refer
to the WHO Classification Table on page E-11 for assessment of their blood pressure
LifeSource Health Line (Toll-Free): 1-888-726-9966
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
Assessing High Blood Pressure for Adults
What Is Blood Pressure?
Blood pressure is the force exerted by blood against the walls of the
arteries. Systolic pressure occurs when the heart contracts; diastolic
pressure occurs when the heart expands. Blood pressure is measured in
millimeters of mercury (mmHg).
What Affects Blood Pressure?
Blood pressure is affected by many factors: age, weight, time of day,
activity level, climate, altitude and season. Certain activities can significantly alter one’s blood pressure. Walking can raise systolic pressure by
12 mmHg and diastolic pressure by 5.5 mmHg. Sleeping can decrease
systolic blood pressure by as much as 10 mmHg. Taking your blood
pressure repeatedly without waiting an interval of 5 minutes between
readings, or without raising your arm to allow blood to flow back to the
heart, can also affect it.
The following standards for assessing high blood pressure (without
regard to age or gender) have been established as a guideline. Please note
that other risk factors (e.g. diabetes, obesity, smoking, etc.) need to be
taken into consideration and may affect these figures. Consult with your
physician for an accurate assessment.
JNC7 Classification Table – for adults within the U.S
An individual’s blood pressure varies greatly from day to day and season
to season. For hypersensitive individuals, these variations are even more
pronounced. Normally, blood pressure rises during work or play and falls
to its lowest levels during sleep.
Systolic (mmHg)
Diastolic (mmHg)
less than 120
and less than 80
Stage 1 Hypertension
greater than
or equal to
Stage 2 Hypertension
greater than
or equal to
SOURCE: The Seventh Report of the Joint National Committee on Prevention, Evaluation and Treatment
of High Blood Pressure for adults. National Heart, Lung and Blood Institute - May 2003.
In addition to these factors, beverages containing caffeine or alcohol,
certain medications, emotional stress and even tight-fitting clothes can
make a difference in the readings.
What Causes Variations In Blood Pressure?
BP Classification
WHO Classification Table – for adults outside of the U.S.
(e.g. Canada, Mexico)
BP Classification
Systolic (mmHg)
less than 120
Diastolic (mmHg)
and less than 80
less than 130
less than 85
Stage 1 Hypertension
Stage 2 Hypertension
greater than
or equal to
Stage 3 Hypertension
greater than
or equal to
SOURCE: Standards to assess high blood pressure, without regard to age or gender, have been
established by the World Health Organization (WHO).
LifeSource Health Line (Toll-Free): 1-888-726-9966
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
What Is Hypertension?
Hypertension (high blood pressure) is the diagnosis given when readings
consistently rise above normal. It is well known that hypertension can
lead to stroke, heart attack or other illness if left untreated. Referred to as a
“silent killer” because it does not always produce symptoms that alert you
to the problem, hypertension is treatable when diagnosed early.
Can Hypertension Be Controlled?
In many individuals, hypertension can be controlled by altering lifestyle
and minimizing stress, and by appropriate medication prescribed and
monitored by your doctor. The American Heart Association recommends
the following lifestyle suggestions to prevent or control hypertension:
Don’t smoke.
Have regular
Reduce salt and fat intake. physical checkups.
Maintain proper weight.
Monitor your blood Exercise routinely. pressure at periodic
Answers to Why Your Readings are Different Between Home
and at the Doctor’s Office
Why are my readings different between home and at a doctor’s office?
Your blood pressure readings taken in a doctor’s office or hospital setting
may be elevated as a result of apprehension and anxiety. This response is
known as white coat hypertension.
When I bring my monitor to a doctor’s office, why do I get a different
measurement from my monitor to that taken by a doctor or nurse?
The healthcare professional may be using a different sized cuff. The size of
the bladder inside the cuff is critical for the accuracy of the measurement.
This may give you a different reading. A cuff too large will produce
a reading that is lower than the correct blood pressure; a cuff that is
too small will produce a reading that is higher than the correct blood
pressure. There may also be other factors that can cause the difference in
Why Measure Blood Pressure at Home?
It is now well known that, for many individuals, blood pressure readings
taken in a doctor’s office or hospital setting might be elevated as a result
of apprehension and anxiety. This response is commonly called “white
coat hypertension.”
In any case, self-measurement at home supplements your doctor’s
readings and provides a more accurate, complete blood pressure history.
In addition, clinical studies have shown that the detection and treatment
of hypertension is improved when patients both consult their physicians
and monitor their own blood pressure at home.
LifeSource Health Line (Toll-Free): 1-888-726-9966
Keys to Successful Monitoring:
Blood pressure fluctuates throughout the day. We recommend that you are
consistent in your daily measurement routine:
• Measure at the same time every day.
• Sit in the same chair/position.
• Do not cross legs and keep your feet flat on the floor.
• Relax for 5 minutes before measurement.
• Use the correct cuff size to get an accurate reading.
• Sit still during measurement – no talking, eating or sudden
• Record your measurement in a logbook.
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
Establishing Baseline Measurements
The most important method to get an accurate blood pressure
measurement is consistency. To get the most benefit out of your monitor,
it is important to establish a “baseline measurement.” This helps build a
foundation of measurements that you can use to compare against future
readings. To build this baseline measurement, devote two weeks for
consistent blood pressure monitoring. This involves doing everything
the same way when you measure (e.g. measuring during the same time
of day, in the same location, sitting in the same chair, using the same
cuff, etc.). Once you establish your baseline measurement, you can start
evaluating if your measurement has been affected based on things like
lifestyle changes or medication treatment.
How Do I Record My Blood Pressure?
Blood pressure readings are typically recorded with the systolic pressure
written first, followed by a slash mark and the diastolic pressure. For
example, 120 mmHg systolic and 80 mmHg diastolic measurements are
written as 120/80. Pulse is simply written with the letter “P” followed by
the pulse rate—P 72, for example. Please see the back of the manual for
the blood pressure tracking record.
Customer Support Tools Online
Additional tools are available on to help you
get the most out of your blood pressure monitoring. These include:
• Large Print Instruction Manuals
• Animated Operating Instructions for select models
• Additional Logbook Sheets
Probable cause
Corrective action
Nothing appears
in the display,
even when the
power is turned
Batteries are drained.
Replace all batteries with
new ones. Alkaline batteries
Battery terminals
are not in the correct
Reinstall the batteries with
negative and positive terminals
matching those indicated in the
battery compartment.
The cuff does not
Battery voltage is
too low. Low battery
symbol blinks. [If the
batteries are drained
completely, the mark
does not appear.]
Replace all batteries with
new ones. Alkaline batteries
The unit does
not measure.
Readings are too
high or too low.
The cuff is not fastened
Fasten the cuff correctly.
You moved your arm
or body during the
Make sure you remain very
still and quiet during the
The cuff position is not
Sit comfortably and still. Make
sure the cuff is at the same level
as your heart.
The healthcare professional may be using a
different sized cuff.
See Pg. E-13 "Answers to Why
Your Readings are Different
Between Home and at the
Doctor's Office."
Your measurements
may be elevated
by white coat
See Pg. E-12 "Why Measure Blood
Pressure at Home?"
The value is
different from
that measured
at a clinic or
doctor’s office.
NoTE: If the actions described above do not solve the problem, call 1-888-726-9966.
Do not attempt to repair the device yourself.
LifeSource Health Line (Toll-Free): 1-888-726-9966
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
Contact Information
Model ��������������������������������������������������������������UB-521CN
Display ������������������������������������������������������������Digital, 9/7-mm character
height, Pressure/Pulse displayed
Memory������������������������������������������������������������90 readings
Measurement range����������������������������������������Pressure: 20 mmHg to 280
Pulse: 40 pulses to 180pulses/
Accuracy����������������������������������������������������������Pressure: ± 3 mmHg or ± 2%,
whichever is greater, Pulse: ± 5%
Pressurization��������������������������������������������������Automatic, using micropump
Deflation ����������������������������������������������������������Automatically by solenoid valve
Power source ��������������������������������������������������2 type AAA (1.5 volt) alkaline batteries (included)
Battery life ������������������������������������������������������Approximately 400
Operating environment������������������������������������50ºF to 104ºF (10ºC to 40ºC)
Less than 95% relative humidity
Storage environment ��������������������������������������14ºF to 140ºF (-10ºC to 60ºC)
Less than 95% relative humidity
Wrist Circumference Range����������������������������5.3 – 8.5” (13.5 – 21.5 cm)
Dimensions������������������������������������������������������Length: 1.2” (30 mm)
Width: 2.4” (60 mm)
Height: 2.6” (65 mm)
Weight��������������������������������������������������������������3.2 oz. (89 g) without batteries
Blood pressure measurements determined by the UB-521CN are equivalent to those obtained by a trained
observer using the cuff/stethoscope auscultation method within the limits prescribed by the American
National Standards Institute for electronic or automated sphygmomanometers.
LifeSource Health Line (Toll-Free): 1-888-726-9966
Our products are designed and manufactured using the latest scientific
and technological methods, and offer accurate, easy to use, home
monitoring and treatment options. Our full product line includes:
Digital Blood Pressure Monitors
Manual Blood Pressure Kits
Blood Pressure Cuffs
Personal Health Scales
Digital Thermometers
This LifeSource blood pressure product is covered by a Lifetime Warranty.
Visit our web site at
for more information.
For more information regarding use, care or servicing of your blood
pressure monitor, contact:
A&D Medical
A division of A&D Engineering, Inc.
1756 Automation Parkway
San Jose, CA 95131
LifeSource Health Line (Toll-Free):
In Canada–Auto Control Medical (Toll-Free): 1-800-461-0991
If You Need Assistance with the Set-Up or Operation
We Can Help!
Please call us FIRST before contacting your retailer at
LifeSource Health Line
1-888-726-9966 - Toll Free
In Canada–Auto Control Medical
1-800-461-0991 -Toll Free
A specially trained representative will assist you.
A&D Medical
A division of A&D Engineering, Inc.
1756 Automation Parkway
San Jose, CA 95131
Pressure Rating Indicator™ is a registered trademark of A&D Medical and is
patent pending.
© 2009 A&D Medical. All rights reserved.
Specifications subject to change without notice.
Printed in China 4/09
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