INSTRUCTION MANUALFORDIGITAL BLOOD PRESSURE MONITOR
REF

CH-461C

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.

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 THEDISPLAY
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

- Eng 2 -(for monitor)
4 AA-size
batteries

Instruction
ManualGeneral remarks on blood pressure and blood pressure
measurement
1.

To deﬂate 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 ofyour medication prescribed by your physician.

5.

As preparation for measuring your blood pressure, you should urinate and thenremain relatively still for 10 to 15 minutes prior to measurement.

6.

Exercising, eating, drinking, smoking, etc., prior to measurement may affect theresults.

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 acontinuing 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 ﬁve or six deep breaths and then relax before measuring your bloodpressure. 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 fromlack 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 ﬁnger can be inserted
See page 15)
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 ofthe cuff at the level of your heart and DO NOT move your arm or talk.

- Eng 3 -EnglishGENERAL REMARKSEnglishGENERAL REMARKS9.

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 bloodpressure and you will not get valid reading.

10. The ﬁgure below shows the blood pressure classiﬁcations under the WHO
standards.

Remarks:
The graph is not exact, but
may be used as a guide inunderstanding non-invasive
blood pressure measurements.
The device is only intended foruse with adults.

Deﬁnitions and Classiﬁcations 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 overa long period has far more signiﬁcance 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.

- Eng 4 -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 feelunwell, 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 ascongestion 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 toyour health.

8.

Measurement may not be possible for anyone with insufﬁcient blood ﬂow to thearea where measurements will be taken or who suffers from a frequent irregularheartbeat. 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 ﬂammable 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 andcause a ﬁre.
13. DO NOT use mobile phones near the monitor as this could result in amalfunction.
14. If you use a cardiac pacemaker, consult your physician before using the monitor.

- Eng 5 -English

PRECAUTIONS FOR USE AND MAINTENANCE

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 ﬁbrillation.

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 orvibration.

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 CodeWarning

The device has been tested and homologatedin 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.

- Eng 6 -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 themonitor inspected every two years to ensure correct functioning and accuracy.
Please contact a distributor.

CITIZEN SYSTEMS(H.K.) LIMITEDFLAT A-B, 4TH FLOOR, HUNG MOU INDUSTRIAL
BUILDING, 62 HUNG TO ROAD, KWUN TONG,
KOWLOON, HONG KONG

European Representative:
Name :
Address :WvW electronishe Geräte Vertrieb GmbH
Fintelmannstraße, 20/Eingang, Martin-Heydert-Straße,
D-14109 Berlin, Germany*For technical data, please contact our European Representative.

- Eng 7 -English

PRECAUTIONS FOR USE AND MAINTENANCE

English

UNIVERSAL DESIGNThis 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 thatcompliment the human body, which make it “easy to understand,” “safe to use,” and“easy to use.”

nd
ple a
Sim iful conﬁgurationtubea

Large and Legible charactersemory that
lpful mHe es 7 measureme
r
nts
o
st
pressure/ood(Bl ber of pulse)mNu

Large andeasy
press switch b -touttonimple measurement
atic stomngle button
Au eans of simby- Eng 8 -English

IDENTIFICATION OF PARTS
Component names<Main Unit>
Systolic bloodpressure display
Diastolic bloodpressure display
Pulse display

Battery icon
Memory icon
Measurement
icon

START/STOP
Switcha Stand-by

Air hose socket
MEMORY Switch

Air hose socket

Battery cover- Eng 9 -English

IDENTIFICATION OF PARTS<Cuff>Cuff

Air hose connector

Air hose- Eng 10 -English

LOADING THE BATTERIES(Batteries supplied with the unit should be loaded in compartment before putting theBlood pressure monitor in use.)

1

Open the cover of battery compartment.
Pressing the hook down, pull the cover toward you to open.
Battery compartment

Lug (projecting section)

Battery
compartment
cover

Hook

2 Place batteries in the compartment.
Put the batteries paying attention to the positive andnegative terminal symbols m and ,.

4 “AA” batteries* If the Blood pressure monitor
is left unused for an extended
period of time, the batteries
should be removed from thecompartment.

- Eng 11 -English

LOADING THE BATTERIES

3 Close the battery compartment cover.
Fit the lugs (projections) at
the recesses.

Fitting the lugs of thecover at the matingrecesses of the battery
compartment body, push
the hook to close thecover.

REMOVING THE BATTERIES• When the icon
is displayed, or where the clock is no longer shown or nothingappears in the display, replace the old batteries with four new ones. All fourbatteries 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 speciﬁed.
• When disposing of used batteries, comply with governmental regulations orenvironmental public institution’s rules that apply in your country /area.

- Eng 12 -

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 thebatteries. If the batteries are left in the compartment, electrolyte may leak from thebatteries and cause a fault in the blood pressure monitor.
• If the AC adapter is used as the only power supply for the monitor, unplugging theAC 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 theblood pressure monitor could cause a malfunction.

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

USING AC ADAPTER (OPTION)

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 sidewith the Velcro patch is on the outside.

2

Put the arm cuff around your arm so thatthe blue marker comes to the palm side.

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 yourelbow.

Blue marker

Metal hoop

* The cuff should be put on the bare arm
or over a light-weight underwear.
* If you wear a heavy-weight top, please
remove it.

- Eng 14 -English

MEASURING YOUR BLOOD PRESSURE

4Pull the end of the arm cuff
outwards so that the cuff issnug around your arm andthen 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.
* Carefully place the cuff on yourarm, taking care to use thecorrect tightness. The tightness
is correct if you can readily slidea ﬁnger between the cuff andyour 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 ofother factors. Ideally, you should measure your blood pressure in the same postureat the same time every day.
■ Taking measurements while sitting
1 Place your arm on a table orsimilar surface with your forearm
extended.
2 It is important to have the arm cuff
level with your heart.
3 Open your hand slightly on thetable so that your palm is facing
up and your ﬁngers are relaxed.
4 Do not move your body or talkwhile 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 ﬁngers.
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 thesame arm each day.

- Eng 16 -

2 Plug the air hoseconnector into the mainunit.
• Plug the air hose connector ﬁrmly
into the air hose socket on themain unit as illustrated.

3 Start measurement.

• Press the "START/STOP" switch.
• All of the segment will be displayed• The

mark comes on.

• Themark goes out. Now, the pump activates.

- Eng 17 -EnglishMEASURING YOUR BLOOD PRESSURE

English

MEASURING YOUR BLOOD PRESSURE• The Blood pressure monitor automatically carries out
pressurization until the pressure that is best suited to theblood 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,themark comes on and the unit automatically starts
measuring your blood pressures.
• When the unit detects your pulse, themark ﬂashes on
and off, then the unit gives your blood pressure value on
the lower section of the display.

• Upon completion of measurement, the unit automaticallyexhausts air from the cuff. Then, the Systolic bloodpressure/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 timeand date are automatically stored in memory as one set ofdata.
• Up to 7 sets of measurement data can be stored in thememory. If you measure your blood pressure when 7 setsof measurements have already been stored in memory, theearliest set of measurements is automatically deleted tomake way for the new measurements.

- Eng 18 -

4 Finishing measurement.
• Press “START/STOP” switch to turnthe monitor off.
* When you want to stop measurement,press “START/STOP” switch. The
air in the cuff is exhausted to stopmeasurement.

[Manual pressurization]• Keep “START/STOP” switch held pressed until
the pressure value you want to stop pressurizationis reached (approximately 40mmHg higher
than the Systolic blood pressure). You can stoppressurization 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’sAuto OFF function will automatically turn the monitor off after 3 minutes.

- Eng 19 -EnglishMEASURING YOUR BLOOD PRESSURE

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 tocall 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 theupper right section of the display. Then, the averageof the whole data stored in memory appears on thedisplay.

- Eng 20 -English

HOW TO CALL UP THE DATA STORED IN MEMORY• Press the “MEMORY” switch again. This recalls anddisplays ﬁrst the memory number and then the last setof data stored.

• Press the “MEMORY” switch again. This recalls anddisplays 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 orderof 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- Eng 21 -The earliest
dataEnglish

KEY TO DISPLAY ICONS
Icon displayed

Condition/Cause

Corrective action

Insufﬁcient pressure.

Repeat measurement
again.

Appears when the bloodpressure could not bemeasured accurately.

Reapply cuff properly andmeasure again.

The pressure is 281
mmHg or higher.

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-applypressure.

Appears when thebatteries are running low.

Replace the batteries.

Detected problem in thedevice.

Ask purchased store.

- Eng 22 -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 thearterial blood pressure and represents, in general terms, your blood pressure. Bloodpressure is indicated by several kinds of pressures, including the systolic pressurethat occurs when the heart pumps blood and the diastolic pressure that occurs
when blood returns to the heart.
(Systolic)(Diastolic)ArteryArteryLeft atrium

Left atrium

Left
ventricle

Leftventricle The artery wall expands.
Contraction

Normal state is restored
to the artery wall.
DilationYour blood pressure changes all the time.

Blood pressure value (mmHg)

Your blood pressure differs according to your age, gender and a range of otherfactors. It is likely to be affected by your biorhythm during the day and by yourposture, physical activities, mental activities, level of stress and even by the airtemperature. The blood pressure of a healthy person generally varies within a day.

Systolic blood pressure

Diastolic blood pressure

Time of day- Eng 23 -EnglishABOUT “BLOOD PRESSURE”

English

BLOOD PRESSURE Q&A
Q Why is the blood pressure measured at home different from that measured by thephysician or at a hospital?

A Your blood pressure may vary due to exercise, the ambient temperature or yourmental state. When you have a physician or nurse measure your blood pressure, thepressure 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 yourhealth.

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 atmospherictemperature. In addition, blood pressure is easily affected by mental stress oremotional ups and downs. It tends to increase when you feel tension or decrease
when you are relaxed.

Q What is the beneﬁt of measuring my blood pressure at home?
A Blood pressure measurements taken at home give reliable data as they can betaken 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 bloodpressure.

Always consult your physician for an interpretation of your blood pressure
readings and to determine the proper treatment.

- Eng 24 -

Make sure to check the following before sending your blood pressure monitor away
to be tested or repaired.
Problem

ChecksResponse

Display stays blank when
you press the “START/STOP” switch.

Check whether thebatteries are dead.

Replace all the batteries
with new ones.

Check whether thebatteries are installed theright way round (m and, oriented correctly).

Load the batteries in thecorrect direction.

No measurements canbe taken.

Check whether themeasurement icon
displayed.

Attach the arm cuff
properly.

isCheck whether the arm
cuff is applied correctly.
Did you stay calm during
measurement?

Measure your bloodpressure again, making
sure to remain still.

Note that blood pressure measurement may not be
possible for someone with an extremely weak pulse
or cardiac arrhythmia (irregular pulses).
Your blood pressure readings are abnormally high or
low compared with those taken in hospital.

See page 24.
Remove the batteries fromthe unit and change themwith new ones.

Other phenomena- Eng 25 -EnglishBEFORE REQUESTING REPAIRS OR TESTING

English

SPECIFICATIONS
Model Number:
Measurement system:
Measurement Localization
Cuff:
Arm circumference range:
Pressure
Measurement range:
Pulse
Pressure
Accuracy:
Pulse
Pressure
Pulse
LCD displays:
Icons
Switch:Inﬂation:Deﬂation:
Rated voltage:
Exhaust:Power supply:
Alkaline
Manganese
Automatic Power Off function:
Memory capacity:
Dimensions:
Weight:Temperature
Operating conditions:
Humidity
Temperature
Storage conditions:
Humidity
Electric shock protection:
Safety Classiﬁcation:
Mode of operation:
Protection against ingress of water:
Battery duration:

Accessories

CH-461C
Oscillometric method
Upper Arm
Soft cuff
20.0 to 32.0 cm
0 to 280 mmHg
40 to 180 pulse/min±3 mmHg±5% of reading
3 digits
3 digits: Memory icon, : Measurement icon,:Battery icon
2 (START/STOP, MEMORY)
Automatic Inﬂation by internal pump
Automatic speed deﬂation system controlled byinternal electromagnetic valve.
3W (: direct current)
6V DC
Electromagnetic quick exhaust valve
4 AA batteries (LR6) or optional AC/DC adapter(6V DC, 0.6A)
Approx. 700 times(170 mmHg, once/day,
22°C)
Approx. 200 times
Approx. 3 min. (after activated)
7 sets of data
112(W) x 76(H) x 145(D) mm
Approx. 340g w/o batteries cuff: approx. 140g
10°C to 40°C
30% to 85% RH-20°C to 60°C
10% to 95%RH
Internal power unit
Type B Equipment
Continuous operation
IPX0
Set includes a cuff, 4 AA batteries for themonitor (LR6), Instruction Manual.

- Eng 26 -

INSTRUCTION MANUALFORDIGITAL BLOOD PRESSURE MONITOR
REF

CH-461C

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.

0801