INSTRUCTION MANUAL
FOR
DIGITAL BLOOD PRESSURE MONITOR
REF CH-461C
0801
Contents
3 - GENERAL REMARKS
5 - PRECAUTIONS FOR USE AND MAINTENANCE
8 - UNIVERSAL DESIGN
9 - IDENTIFICATIONS OF PARTS
11 - LOADING THE BATTERIES
12 - REMOVING THE BATTERIES
13 - USING AC ADAPTER (OPTION)
14 - MEASURING YOUR BLOOD PRESSURE
16 - TIPS FOR OBTAINING ACCURATE MEASUREMENTS
19 - AUTOMATIC POWER OFF FEATURE
20 - HOW TO CALL UP THE VALUES STORED IN MEMORY TO THE
DISPLAY
20 - HOW TO CALL UP THE DATA STORED IN MEMORY
22 - KEY TO DISPLAY ICONS
23 - ABOUT “BLOOD PRESSURE”
24 - BLOOD PRESSURE Q&A
25 - BEFORE REQUESTING REPAIRS OR TESTING
26 - SPECIFICATIONS
Ensure that you have all the following components
Blood pressure
monitor unit
Cuff (for monitor)
4 AA-size
batteries
- Eng 2 -
Instruction
Manual
GENERAL REMARKS
General remarks on blood pressure and blood pressure
measurement
1. To defl ate the cuff quickly, press the “START/STOP” switch.
2. The attached cuff is suitable for arm circumferences of 20-32 cm.
3. When attaching the cuff, the air hose should be placed on the inside of your arm
on top of the artery.
4. Self measurement is not therapy! In no event should you change the dosage of
your medication prescribed by your physician.
5. As preparation for measuring your blood pressure, you should urinate and then
remain relatively still for 10 to 15 minutes prior to measurement.
6. Exercising, eating, drinking, smoking, etc., prior to measurement may affect the
results.
7. Your blood pressure varies constantly throughout the day. Measurements
should be taken regularly at the same time each day.
8. DO NOT place too much emphasis on the results of one measurement. Keep a
continuing record of your blood pressure variations. A complete picture can only
be obtained from a large number of readings.
9. Emotional stress tends to cause your blood pressure to rise.
To obtain correct blood pressure measurements
1. Take fi ve or six deep breaths and then relax before measuring your blood
pressure. If you are tense when taking the measurement, you will not get a valid
reading.
2. Your blood pressure will be elevated if you are anxious or irritated, suffering from
lack of sleep or constipation, or have just taken some exercise or eaten a meal.
3. Wrap the cuff around your arm and tighten it so that one fi nger can be inserted
between the cuff and arm. (
4. DO NOT measure your blood pressure after bathing or drinking.
5. If you feel the need to urinate, do so before measuring your blood pressure.
6. Measure your blood pressure where the room temperature is around 20°C. DO
NOT measure your blood pressure when it is too cold (below 10°C) or too hot
(above 40°C) in the room.
7. DO NOT try to measure your blood pressure immediately after drinking coffee or
tea or after smoking.
8. Measure your blood pressure when you are relaxed and still. Keep the center of
the cuff at the level of your heart and DO NOT move your arm or talk.
See page 15)
English
- Eng 3 -
English
GENERAL REMARKS
9. DO NOT measure blood pressure when the cuff has been on your arm for a few
minutes or more. During this time, your arm will have built up a higher blood
pressure and you will not get valid reading.
10. The fi gure below shows the blood pressure classifi cations under the WHO
standards.
Remarks:
The graph is not exact, but
may be used as a guide in
understanding non-invasive
blood pressure measurements.
The device is only intended for
use with adults.
Defi nitions and Classifi cations of Blood Pressure Levels
Measure your blood pressure at the same time each day.
* Your blood pressure changes all the time. This means that data gathered over
a long period has far more signifi cance than data from just one measurement.
For this reason, you must measure your blood pressure on a daily basis. Ideally,
you should measure your blood pressure at the same time each day wherever
possible.
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PRECAUTIONS FOR USE AND MAINTENANCE
Precautions for use
1. If you suffer from heart disease, high blood pressure or other circulatory disease,
consult your physician before using the monitor.
2. If the cuff pressure feels abnormal or you experience any other irregularity while
using the cuff, reduce the pressure immediately by pressing the “START/STOP”
switch and then consult the sales outlet where you purchased the monitor.
3. If you think the measurement is abnormal or if measurement makes you feel
unwell, discontinue use and consult your physician.
4. Blood pressure measurement may not be possible for anyone with a weak pulse
or arrhythmia.
5. Repeated blood pressure measurement may cause problems such as
congestion or swelling in some people.
6. Frequently repeated blood pressure measurements will not give accurate
results. Allow an interval of about 3 minutes between measurements.
7. If you suffer from a severe problem with blood circulation in your arms, consult
your physician before using the monitor. Failure to do so could be hazardous to
your health.
8. Measurement may not be possible for anyone with insuffi cient blood fl ow to the
area where measurements will be taken or who suffers from a frequent irregular
heartbeat. Consult your physician for advice on whether to use the monitor.
9. DO NOT wrap the cuff around an injured arm.
10. DO NOT wrap the cuff around an arm in which a drip (intravenous infusion)
is inserted or which is being used for blood transfusion as part of medical
treatment. Doing so could result in an injury or a serious accident.
11. DO NOT use the monitor in the vicinity of fl ammable gases such as those used
for anaesthesia. Doing so could ignite the gases and cause an explosion.
12. DO NOT use the monitor in enriched oxygen environments such as a hospital’s
hyperbaric chamber or oxygen tent. Doing so could ignite the oxygen and
cause a fi re.
13. DO NOT use mobile phones near the monitor as this could result in a
malfunction.
14. If you use a cardiac pacemaker, consult your physician before using the monitor.
English
- Eng 5 -
English
PRECAUTIONS FOR USE AND MAINTENANCE
15. Be sure to use this unit only for measuring blood pressure. DO NOT use it for
any other purpose.
16. DO NOT use this unit on infants.
17. Blood pressure measurement may not be possible for anyone with common
arrhythmias such as atrial or ventricular premature beats or atrial fi brillation.
Maintenance Precautions
1. DO NOT store the blood pressure monitor in locations exposed to direct
sunlight, high temperatures (over 60°C), low temperatures (below
-20°C), high relative humidity (over 95%) or excessive amounts of dust.
2. DO NOT drop the blood pressure monitor or subject it to other shocks or
vibration.
3. Remove the batteries if the monitor will be left unused for a long period.
4. DO NOT attempt to disassemble the monitor.
5. DO NOT bend the cuff or the air hose excessively.
6. If the monitor is very dirty, wipe it clean with a cloth moistened with sterilizing
alcohol or a neutral detergent. Then wipe it with a dry cloth.
7. NEVER clean the blood pressure monitor with thinners or benzene, as this could
damage the monitor.
8. To clean the cuff, wipe it with a moist cloth. Avoid hard rubbing as this will cause
air leakages. Take care also not to get water into the air hose.
Symbols Explanation:
: Device complies with the requirements of the EC Directive 93/42/EEC.
Registered with the CE Marking.
: Type B applied part
: Attention, consult accompanying documents.
: Appliance compliance WEEE directive
: Manufacturer
LOT
: Batch Code
Warning
The device has been tested and homologated
in accordance with EN60601-1-2 for EMC.This
does not guarantee in any way that the device will
not be affected by electromagnetic interference.
Avoid using the device in high electromagnetic
environment.
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PRECAUTIONS FOR USE AND MAINTENANCE
Nature and frequency of maintenance:
This product is designed for use over an extended period of time;
however, it is generally recommended that it be inspected every two
years to ensure proper function and performance.
Protect the nature environment:
Please help to protect natural environment by respecting national and/or local
recycling regulations when disposing of the battery and the product at the end of
their useful live.
WEEE MARK
If you want to dispose this product, do not mix with general household
waste. There is a separate collection systems for used electronics
products in accordance with legislation under the WEEE Directive
(Directive 2002/96/EC) and is effective only within European Union.
Reference European standard:
The blood pressure measuring device corresponds to regulation EN60601-1-2.
Calibration:
The blood pressure measuring device is generally recommended to have the
monitor inspected every two years to ensure correct functioning and accuracy.
Please contact a distributor.
CITIZEN SYSTEMS(H.K.) LIMITED
FLAT A-B, 4TH FLOOR, HUNG MOU INDUSTRIAL
BUILDING, 62 HUNG TO ROAD, KWUN TONG,
KOWLOON, HONG KONG
European Representative:
Name : WvW electronishe Geräte Vertrieb GmbH
Address : Fintelmannstraße, 20/Eingang, Martin-Heydert-Straße,
D-14109 Berlin, Germany
*For technical data, please contact our European Representative.
English
- Eng 7 -
English
UNIVERSAL DESIGN
This product has been developed with the concept of Universal Design to ensure
safe and easy use for a broader range of users. The product’s shape and color was
designed to portray “warmth” and “gentleness” and have functional qualities that
compliment the human body, which make it “easy to understand,” “safe to use,” and
“easy to use.”
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- Eng 8 -
IDENTIFICATION OF PARTS
Component names
<Main Unit>
Battery icon
Memory icon
Measurement
icon
Air hose socket
MEMORY Switch
Systolic blood
pressure display
Diastolic blood
pressure display
Pulse display
START/STOP
Switch
a Stand-by
Air hose socket
English
Battery cover
- Eng 9 -
English
<Cuff>
IDENTIFICATION OF PARTS
Cuff
Air hose connector
Air hose
- Eng 10 -
LOADING THE BATTERIES
(Batteries supplied with the unit should be loaded in compartment before putting the
Blood pressure monitor in use.)
1 Open the cover of battery compartment.
Pressing the hook down, pull the cover toward you to open.
Lug (projecting section)
Battery
compartment
cover
Hook
2 Place batteries in the compartment.
Put the batteries paying attention to the positive and
negative terminal symbols m and ,.
Battery compartment
4 “AA” batteries
English
- Eng 11 -
* If the Blood pressure monitor
is left unused for an extended
period of time, the batteries
should be removed from the
compartment.
English
LOADING THE BATTERIES
3 Close the battery compartment cover.
Fit the lugs (projections) at
the recesses.
Fitting the lugs of the
cover at the mating
recesses of the battery
compartment body, push
the hook to close the
cover.
REMOVING THE BATTERIES
• When the icon is displayed, or where the clock is no longer shown or nothing
appears in the display, replace the old batteries with four new ones. All four
batteries should be changed at once.
• The memory is erased if the batteries are removed for replacement. It is
recommended to make note of the data stored in memory prior to changing
batteries.
• Do not use rechargeable batteries.
• Do not use alkaline and manganese batteries together.
• The monitor is powered by the batteries provided. Note that they may not last as
long as indicated.
• Batteries included are for demonstration purposes only. Battery life maybe shorter
than specifi ed.
• When disposing of used batteries, comply with governmental regulations or
environmental public institution’s rules that apply in your country /area.
- Eng 12 -
USING AC ADAPTER (OPTION)
Using the optional dedicated AC adapter for the CITIZEN blood pressure monitor
(CH-461C) allows you to measure your blood pressure without having to worry about
the amount of remaining charge in the batteries.
AC adapter socket
1 Insert the AC adapter plug into
the socket on the blood pressure
monitor.
2 Plug the AC adapter into a mains
power outlet.
AC adapter plug
AC ADAPTER (OPTION)
Ref: AC-230CZ
• If you plan to use the AC adapter for an extended period of time, remove the
batteries. If the batteries are left in the compartment, electrolyte may leak from the
batteries and cause a fault in the blood pressure monitor.
• If the AC adapter is used as the only power supply for the monitor, unplugging the
AC adapter will erase the data stored in the monitor’s memory. It is recommended
that you make a note of any important data .
• When only batteries are used to supply power to the monitor, the AC adapter
should be unplugged from the monitor. Leaving the AC adapter plugged into the
blood pressure monitor could cause a malfunction.
English
The dedicated AC adapter for the CH-461C is optional.
The AC adapter is available from retailers stocking CITIZEN digital blood pressure
monitors.
- Eng 13 -
English
MEASURING YOUR BLOOD PRESSURE
1
ATTACHING THE ARM CUFF
1 Unroll the arm cuff and thread the end
through the metal hoop so that the side
with the Velcro patch is on the outside.
2 Put the arm cuff around your arm so that
the blue marker comes to the palm side.
Metal hoop
3 Adjust the position of the arm cuff so that the blue marker is located in
the center of your arm and the hem of the cuff is 1 to 2 cm above your
elbow.
* The cuff should be put on the bare arm
Blue marker
or over a light-weight underwear.
* If you wear a heavy-weight top, please
remove it.
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MEASURING YOUR BLOOD PRESSURE
4 Pull the end of the arm cuff
outwards so that the cuff is
snug around your arm and
then secure the end to the
Velcro.
5 Place your arm on a table or the
like so that the center of the cuff
comes to the height of your heart.
English
* Carefully place the cuff on your
arm, taking care to use the
correct tightness. The tightness
is correct if you can readily slide
a fi nger between the cuff and
your arm.
6 Relax your arm and lightly open
the palm upward.
- Eng 15 -
English
TIPS FOR OBTAINING ACCURATE MEASUREMENTS
Your blood pressure varies according to your posture, the time of day and a range of
other factors. Ideally, you should measure your blood pressure in the same posture
at the same time every day.
■ Taking measurements while sitting
1 Place your arm on a table or
similar surface with your forearm
extended.
2 It is important to have the arm cuff
level with your heart.
3 Open your hand slightly on the
table so that your palm is facing
up and your fi ngers are relaxed.
4 Do not move your body or talk
while taking the measurement.
■ Measurement in laying posture
* Relax yourself not
to apply pressure to
the arm cuff.
1 Lie down your head facing the celling.
2 Lightly open your hand with palm up and straighten your arm.
3 Relax your body, arm and fi ngers.
4 Do not move your body or talk during measurement.
■ You may use your right arm to measure your blood pressure.
Blood pressure rate is likely to differ by as much as 10mmHg when measured on
the left arm instead of the right (or vice-versa). Measure your blood pressure on the
same arm each day.
- Eng 16 -
Plug the air hose
2
connector into the main
unit.
• Plug the air hose connector fi rmly
into the air hose socket on the
main unit as illustrated.
Start measurement.
3
• Press the "START/STOP" switch.
• All of the segment will be displayed
• The
MEASURING YOUR BLOOD PRESSURE
mark comes on.
English
• The mark goes out. Now, the pump activates.
- Eng 17 -
English
MEASURING YOUR BLOOD PRESSURE
• The Blood pressure monitor automatically carries out
pressurization until the pressure that is best suited to the
blood pressure measurement is reached.
• When the unit determines that an adequate pressure is not
obtained, the unit starts pressurization again.
• Wait a while after the completion of pressurization. Then,
the
mark comes on and the unit automatically starts
measuring your blood pressures.
• When the unit detects your pulse, the
and off, then the unit gives your blood pressure value on
the lower section of the display.
• Upon completion of measurement, the unit automatically
exhausts air from the cuff. Then, the Systolic blood
pressure/Diastolic blood pressure/pulse will appear on
display.
• As long as the unit functions correctly, the blood pressure
and the pulse rate for the result with the record of the time
and date are automatically stored in memory as one set of
data.
• Up to 7 sets of measurement data can be stored in the
memory. If you measure your blood pressure when 7 sets
of measurements have already been stored in memory, the
earliest set of measurements is automatically deleted to
make way for the new measurements.
mark fl ashes on
- Eng 18 -
MEASURING YOUR BLOOD PRESSURE
Finishing measurement.
4
• Press “START/STOP” switch to turn
the monitor off.
* When you want to stop measurement,
press “START/STOP” switch. The
air in the cuff is exhausted to stop
measurement.
[Manual pressurization]
• Keep “START/STOP” switch held pressed until
the pressure value you want to stop pressurization
is reached (approximately 40mmHg higher
than the Systolic blood pressure). You can stop
pressurization by the unit by releasing the switch at the
aforementioned value is reached.
The upper pressure limit is 280mmHg
AUTOMATIC POWER OFF FEATURE
• After taking the blood pressure measurement, pressing the “START/STOP” switch
will turn the monitor off. However, if you do not press the switch, the monitor’s
Auto OFF function will automatically turn the monitor off after 3 minutes.
English
- Eng 19 -
English
HOW TO CALL UP THE VALUES STORED IN MEMORY TO THE DISPLAY
• Except for the case where the unit is engaged
in measurement, press “MEMORY” switch to
call up the values (measurement results) stored
in memory to the display.
* To erase all the data, remove the batteries. All
the stored data is erased.
HOW TO CALL UP THE DATA STORED IN MEMORY
• Press the “MEMORY” switch.
• “A” that represents the average value appears on the
upper right section of the display. Then, the average
of the whole data stored in memory appears on the
display.
- Eng 20 -
HOW TO CALL UP THE DATA STORED IN MEMORY
• Press the “MEMORY” switch again. This recalls and
displays fi rst the memory number and then the last set
of data stored.
• Press the “MEMORY” switch again. This recalls and
displays the second last set of data stored. Each time
you press this switch, the unit displays the data prior
to the last set of data displayed.
• The value stored in memory is numbered in the order
of measurements. For example, when 7 sets of data
are stored in memory, the data number 1 represents
the latest data.
Data number: 1, 2, 3, 4, 5, 6, 7
▲▲
The latest
data
The earliest
data
English
- Eng 21 -
English
KEY TO DISPLAY ICONS
Icon displayed Condition/Cause Corrective action
Insuffi cient pressure. Repeat measurement
again.
Appears when the bloodpressure could not be
measured accurately.
The pressure is 281
mmHg or higher.
Appears when the
batteries are running low.
Detected problem in the
device.
- Eng 22 -
Reapply cuff properly and
measure again.
If the pressure does not
automatically decline
during measurement,
immediately press the
“START/STOP” switch
and turn the unit off. To
take the measurement
again, refer to P.17
and correctly re-apply
pressure.
Replace the batteries.
Ask purchased store.
ABOUT “BLOOD PRESSURE”
What is blood pressure?
The heart is a pump that circulates blood throughout your body. Blood is pumped
from the heart at a constant pressure into arteries. This pressure is called the
arterial blood pressure and represents, in general terms, your blood pressure. Blood
pressure is indicated by several kinds of pressures, including the systolic pressure
that occurs when the heart pumps blood and the diastolic pressure that occurs
when blood returns to the heart.
English
(Systolic)
Left atrium
Left
ventricle
Artery Artery
The artery wall expands.
Contraction
(Diastolic)
Left atrium
Left
ventricle
Normal state is restored
to the artery wall.
Dilation
Your blood pressure changes all the time.
Your blood pressure differs according to your age, gender and a range of other
factors. It is likely to be affected by your biorhythm during the day and by your
posture, physical activities, mental activities, level of stress and even by the air
temperature. The blood pressure of a healthy person generally varies within a day.
Systolic blood pressure
Diastolic blood pressure
Blood pressure value (mmHg)
Time of day
- Eng 23 -
English
BLOOD PRESSURE Q&A
Q Why is the blood pressure measured at home different from that measured by the
physician or at a hospital?
A Your blood pressure may vary due to exercise, the ambient temperature or your
mental state. When you have a physician or nurse measure your blood pressure, the
pressure value is likely to be 10 to 20 mmHg higher than usual due to anxiety and/or
stress. Knowing what affects your blood pressure helps you to better monitor your
health.
Q Why does the blood pressure obtained vary with measurement?
A Our blood pressure is adjusted by the function of automatic nerve. Blood pressure
differs with every heart beat. We are likely to think that our blood pressure is constant,
but it varies if you take measurements in repetition. Blood pressure is susceptible
to the time of day, such as forenoon and afternoon, season and atmospheric
temperature. In addition, blood pressure is easily affected by mental stress or
emotional ups and downs. It tends to increase when you feel tension or decrease
when you are relaxed.
Q What is the benefi t of measuring my blood pressure at home?
A Blood pressure measurements taken at home give reliable data as they can be
taken when you are in a stable and relaxed condition. Physicians place considerable
importance on blood pressure measurements taken at home. You should measure
your blood pressure at the same time each day and record the variations in your blood
pressure.
Always consult your physician for an interpretation of your blood pressure
readings and to determine the proper treatment.
- Eng 24 -
BEFORE REQUESTING REPAIRS OR TESTING
Make sure to check the following before sending your blood pressure monitor away
to be tested or repaired.
Problem Checks Response
Display stays blank when
you press the “START/
STOP” switch.
Check whether the
batteries are dead.
Check whether the
batteries are installed the
right way round (m and
, oriented correctly).
Replace all the batteries
with new ones.
Load the batteries in the
correct direction.
English
No measurements can
be taken.
Your blood pressure readings are abnormally high or
low compared with those taken in hospital.
Other phenomena
Check whether the
measurement icon
displayed.
Check whether the arm
cuff is applied correctly.
Did you stay calm during
measurement?
Note that blood pressure measurement may not be
possible for someone with an extremely weak pulse
or cardiac arrhythmia (irregular pulses).
is
- Eng 25 -
Attach the arm cuff
properly.
Measure your blood
pressure again, making
sure to remain still.
See page 24.
Remove the batteries from
the unit and change them
with new ones.
English
SPECIFICATIONS
Model Number: CH-461C
Measurement system: Oscillometric method
Measurement Localization Upper Arm
Cuff: Soft cuff
Arm circumference range: 20.0 to 32.0 cm
Measurement range:
Accuracy:
LCD displays:
Switch: 2 (START/STOP, MEMORY)
Infl ation: Automatic Infl ation by internal pump
Defl ation:
Rated voltage: 6V DC
Exhaust: Electromagnetic quick exhaust valve
Power supply:
Battery duration:
Automatic Power Off function: Approx. 3 min. (after activated)
Memory capacity: 7 sets of data
Dimensions: 112(W) x 76(H) x 145(D) mm
Weight: Approx. 340g w/o batteries cuff: approx. 140g
Operating conditions:
Storage conditions:
Electric shock protection: Internal power unit
Safety Classifi cation: Type B Equipment
Mode of operation: Continuous operation
Protection against ingress of water: IPX0
Accessories
Pressure 0 to 280 mmHg
Pulse 40 to 180 pulse/min
Pressure ±3 mmHg
Pulse ±5% of reading
Pressure 3 digits
Pulse 3 digits
Icons
Alkaline Approx. 700 times
Manganese Approx. 200 times
Temperature 10°C to 40°C
Humidity 30% to 85% RH
Temperature -20°C to 60°C
Humidity 10% to 95%RH
: Memory icon, : Measurement icon,
:Battery icon
Automatic speed defl ation system controlled by
internal electromagnetic valve.
4 AA batteries (LR6) or optional AC/DC adapter
(6V DC, 0.6A)
Set includes a cuff, 4 AA batteries for the
monitor (LR6), Instruction Manual.
3W ( : direct current)
(170 mmHg, once/day,
22°C)
- Eng 26 -
CITIZEN is a registered trademark of Citizen Holdings Co., Japan.
CITIZEN es una marca registrada de Citizen Holdings Co., Japón.
Design and Specification are subject to change without notice.
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