INSTRUCTION MANUALFORDIGITAL BLOOD PRESSURE MONITOR
REFCH-671F

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Deutsch0801- Eng 1 -

GENERAL REMARKS
General remarks on blood pressure and blood pressure
measurement
1. If the cuff is to be deflated quickly, depress “POWER” switch.
2. The attached cuff is suited for a wrist circumstance of 13.5 cm to 19.5cm.
3. When attaching the cuff, the body of a blood pressure monitor should beplaced on the inside of your wrist.
4. Self measurement is not therapy! In no case may you change thedosage of medication prescribed by your physician.
5. In preparation for blood pressure measurement, you should urinate andthen 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. Blood pressure varies constantly throughout the day. Measurement
should be made regularly at the same time each day.
8. DO NOT be too impressed by the results of one measurement. Keep arecord of blood pressure variations. Many reading tell a story.
9. Emotional stress may tend to cause blood pressure to rise.

For proper measure of blood pressure
1. Take a deep breath five or six times and then relax before measuring
your blood pressure. If you are tense when taking the measurement, youwill not get a valid reading.
2. Blood pressure will be elevated when you are in a worrisome or irritatedstate, suffering from lack of sleep or constipation, or after exercise or ameal.
3. Wrap the cuff around your wrist snugly. (See page 14)
4. DO NOT measure blood pressure after bathing or drinking.
5. When you feel like relieving yourself, you should do so before measuring
your blood pressure.
6. Measure your blood pressure where the room temperature is about
20°C. DO NOT measure blood pressure when it is too cold (below 10°C)
or too hot (above 40°C) in the room.
- Eng 2 -

7. DO NOT try to measure blood pressure immediately after drinking
coffee or tea or smoking.
8. Measure blood pressure with a relaxed and quiet posture. Keepthe center of the cuff at the level of your heart, and DO NOT moveyour arm or talk.
9. DO NOT measure blood pressure after the cuff has been on yourwrist for a few minute, as you arm will have built up higher bloodpressure, and you will not get valid reading.
10. Next figure shows the classification of blood pressure according
to WHO-standard.

Remarks:
The graph is not exact,
but may be used as a
guide in understanding
non-invasive bloodpressure measurements.
The device intended foruse in adult population.

Definition and Classification of Blood Pressure Levels
Measure your blood pressure at the same time on a daily basis.
* The blood pressure changes at all times. This means that data
gathered over a long period has great significance instead of dataon just one measurement. It is therefore necessary to measure
your blood pressure on a daily basis. Ideally, you should measure
your blood pressure daily at the same time.

- Eng 3 -EnglishGENERAL REMARKSPRECAUTION FOR USE AND MAINTENANCE
Precaution for use
1. If you suffer from heart disease, high blood pressure or othercirculatory disease, please consult your doctor first.
2. If you feel abnormal pressure of the cuff during use or any otherirregularity, reduce the pressure by immediately switching off thepower or remove the batteries and consult the sales outlet wherepurchased.
3. If you think the measured value is abnormal or if measuring makes
you feel unwell, discontinue use and consult your doctor.
4. Measurement of blood pressure may not be possible for someone
with a weak pulse or arrhythmia.
5. If blood pressure is measured repeatedly, congestion, swelling, etc.
may occur in some people.
6. If blood pressure is measured repeatedly, an accurate result will not
be achieved. An interval of about 10 minutes should be allowed.
7. Consult your physician before use if you suffer a severe disorder ofblood circulation in the arms. Failure to do so may cause healthhazards.
8. Measurement may not be possible for someone with an insufficient
blood flow in the area to be measured or frequent irregularheartbeats. Consult your physician for judgment.
9. DO NOT wrap the wrist cuff around an injured wrist.
10. DO NOT wrap the wrist cuff to the wrist where a drip (intravenous
infusion) or blood transfusion under medical treatment. Failure to doso may cause an injury or a serious accident.
11. DO NOT use in the vicinity of flammable gases such as anesthetic
gases because of the risk of ignition and explosion.
12. DO NOT use in enriched oxygen environments such as a hospital’s
hyperbaric chamber or oxygen tent because of the risk of ignition
and fire.
13. DO NOT use a mobile phone near the unit. Doing so may result in
malfunction.
14. The power of this blood pressure monitor may be shut off by electrostatic discharge from the human body. This is only a temporary
phenomenon. You can measure the blood mesaure the bloodcorrectly after pressing the POWER switch once again.

- Eng 4 -

15. If you use a cardiac pacemaker, consult your doctor before use.
16. Be sure to use this unit only for measuring blood pressure. DO
NOT use it for any other purpose.
17. DO NOT use this unit on an infant.

Recaution for maintenance1. DO NOT store the blood pressure monitor where it will be
exposed to direct sunlight, high temperature (over 60°C), lowtemperature (below -20°C), high relative humidity (over 95%) or
in a dusty place.
2. DO NOT drop or expose the blood pressure monitor to underforce or vibration.
3. Remove the battery/batteries when not in use for a long period.
4. DO NOT disassemble the apparatus.
5. DO NOT bend the cuff or air hose unnecessarily.
6. NEVER wipe the blood pressure monitor with thinner or benzene,as they may damage it.
7. When the monitor is very dirty, wipe it clean with a clothmoistened with sterilizing alcohol or a neutral detergent, and thenwipe it with a dry cloth. DO NOT use thinner or benzene.

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 protect natural environment by respecting natural and/or
local recycling regulations when disposing of the batteries and the
products at the end of their useful lives.

- Eng 5 -English

PRECAUTION FOR USE AND MAINTENANCE

PRECAUTION FOR USE AND MAINTENANCE

WEEE MARK
If you want to dispose this product, do not mix with generalhousehold waste. There is a separate collection systems forused 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.
The device has been tested and homologated in accordance withfor EMC. This does not guarantee in any way that theWarning EN60601-1-2
device will not be affected by electromagnetic interference. Avoid
using the device in high electromagnetic environment.

Name:
Address : FLAT A-B, 4TH FLOOR, HUNG MOU INDUSTRIAL
BUILDING, 62 HUNG TO ROAD, KWUN TONG, KOWLOON,
HONG KONG(: Manufacturer)

European Representative:
Name: WvW elektronische Geräte Vertrieb GmbH
Address : Fintelmannstraße 20/Eingang, Martin-Heydert-Straße,
D-14109 Berlin, Germany- Eng 6 -

MODE switch
SET switch

MEMORY switch

Battery box

POWER switch
AVG

MONTHLY AVERAGE switch

Time/Date display section

Wrist cuff

Systolic bloodpressure display section
Diastolic bloodpressure display section
Pulse display section

UNIVERSAL DESIGN
The product has been developed through the concept ofUniversal Design to ensure safe and easy use for a wide range
of users. The product, which is designed laying importance on
Universal Design, adopts a product shape and color thatconveys an image of “warmth” and “gentleness” and has
functions that cope with human body, which are “easy tounderstand”, “safety in use” and “easy to use”.
- Eng 7 -EnglishIDENTIFICATION OF PARTS

HOW TO LOAD BATTERIES
Remove the battery box from the unit. Install two “AAA” alkaline
batteries, observing the proper battery polarity (“+/–”).

1 While pinching the stopper

Pushtabs, pull the battery box in the
direction of the arrow to
remove from the unit.

2 Insert the batteries into thebattery box, ensuring a correct
match with positive + and –negative terminals.
* The battery goes in negative – side first.

3 Re-attach the battery box to theunit with the battery’s visible
side facing up.
* Make sure not to depress the switch when
you re-attach the battery box into the mainunit.
* Install the battery box properly. Improper
installation may prevent proper display
when theis pressed.

* After replacing the batteries, be sure to set theclock.
(
See page 10 “HOW TO SET THE CLOCK”.)* The data in memory is kept after the batteries are replaced.

- Eng 8 -PushHOW TO UNLOAD BATTERIES

1 Pull the battery box to remove fromthe unit.
(

See page 8 “HOW TO LOAD BATTERIES ”.)

2 Push up each battery by lifting up its
positive + end side with yourfingertip.
* Use caution when removing batteries that are heldin place by the springs in the battery box. Failure
to do so may cause injury to your fingernail.

3 Re-attach the battery box to the unit.
(

See page 8 “HOW TO LOAD BATTERIES ”.)

Replacing the batteries• Replace the batteries with two new “AAA” alkaline batteries whenappears
on the display, or when nothing appears on the display when the POWER
switch is pressed.
• Be sure to replace both batteries with new ones.
• Use the commercial alkaline dry cells. Do not use rechargeable batteries.
• Batteries included are for demonstration purposes only. Battery life may be
shorter than specified.
• Dispose of used batteries properly in accordance with local regulations.

- Eng 9 -EnglishHOW TO UNLOAD BATTERIESHOW TO SET THE CLOCK
The device is equipped with a built-in clock allowing you to record
your pressure readings with time and date information. Set theclock properly to keep a precise record of the time and date of yourmeasurement results. The clock-setting procedure goes in thefollowing order: Year/Month/Date and then Hour/Minute.
The clock has been factory preset to 12:00AM on January 1, 2004.
After batteries have been replaced, the clock will indicate the timeand date of the most recent measurement data in memory.
Example: Set the clock to 08:05 PM on May 1, 2004.

1 After making sure that the power isturned off, press and holdfor

more than a second.
The last figure of the Year (A.D.) will appear on thepulse display section and Month/Date will appear
on the Time/Date display section.
The “ Year ” blinks and then will be corrected.

2 Set the “Year”.
Press

to set the current year.

* The “Year ” can be set between 04(2004)and33(2033).

Press

.

This will finalize the “ Year ” setting. The digits
representing the “ Month ” On the date display
section will flash.

- Eng 10 -

Pressing and holding

will cause a rapid adjustment of years,

months, days, hours, and minutes.

3 Set the “Month”.
Press
Press

to set the current month.
.

This will finalize the “Month” setting. The digits
representing the “Date” on the date display section
will flash.

4 Set the “Date”.
Press
Press

to set the current date.
.

This will finalize the “Date” setting. The digits
representing the “Hour” on the time display section
will flash.

- Eng 11 -EnglishHOW TO SET THE CLOCKHOW TO SET THE CLOCK

5 Set the “Hour”.
Press

to set the current hour.

• The clock displays the time in 12 hour format
using AM/PM.

Press

.

This will finalize the “Hour” setting. The digits
representing the “Minute” on the time display
section will flash.

6 Set the “Minute”.
Press
Press

to set the current minute.
.

This will complete the clock setting procedure. The
device automatically turns off power.

• The “Second” will be set to 00 at the moment
when
If

is pressed.
is pressed during the correcting procedure for each item,the unit will automatically turn off the power. However, the corrected
data are saved in this step.
- Eng 12 -Blood pressure varies with posture, the time of day and numerous
other factors. It is recommended that you measure your bloodpressure at the same time each day in the same posture.
Take a deep breath andthen relax before
measuring blood pressure.

Make sure that yourposture is correct.

Lightly open your handon the table with palm up
and relax your fingers.
Level the blood pressure
monitor to your heart.

Fold up a towel and put it
between your elbow and wrist
to steady your forearm.

Make sure that your posture is correct.
Remain still during measurement.
Wrap the wrist cuff properly.

DO NOT clench yourfist tightly.

DO NOT place themonitor on the outsideof your wrist.
- Eng 13 -Keep the device
stable during
measurement.

EnglishPOINTS FOR ACCURATE MEASUREMENTHOW TO WRAP THE WRIST CUFF
Wrap the wrist cuff around your wrist properly. Improper wrappingof the cuff may result in measuring errors.

1 Unfasten and open the wrist cuff.
2 Wrap the cuff around your left
wrist so that the monitor ispositioned on the inside of yourwrist.
• Wrap the wrist cuff on bare skin.
• The wrist cuff is designed to fit wrists from
13.5 to 19.5 cm in circumference.

3 Loosely fit the wrist cuff bypulling the end of the cuff.

- Eng 14 -

4 Position the top edge of the cuff
approximately 1 to 2 cm awayfrom the crease of your wrist.

5 Secure the wrist cuff with the
Velcro.
• If the wrist cuff is wrapped too loose or
tight, errors or incorrect readings may
result.

- Eng 15 -EnglishHOW TO WRAP THE WRIST CUFF

HOW TO MEASURE YOUR BLOOD PRESSURE
Your blood pressure can be readily measured with the push of abutton.

1 Wrap the wrist cuff around your left wrist.
(

See page 14 “HOW TO WRAP THE WRIST CUFF”.)

If you have a weak pulse:
Take a measurement so that the center of the unit is positioned over theartery located on your wrist.

Position of artery

Center of blood pressure monitor

2 Make sure that your posture is correct.
(

See page 13 “POINTS FOR ACCURATE MEASUREMENT ”.)- Eng 16 -

3 Press

.

AVG

The
mark will light up and stay on for
approximately 2 seconds.

The cuff will begin to inflate, and the date andpressure readings will appear on the display.
• Do not move your wrist or arm during
inflation when measurement is in progress.
• Do not press the switch while the unit isapplying pressure.

Themark will light up when the presetpressure is reached.

- Eng 17 -EnglishHOW TO MEASURE YOUR BLOOD PRESSURE

HOW TO MEASURE YOUR BLOOD PRESSURE
When a pulse is detected, a pressure reading
will shift to the diastolic pressure display
section. Once the pulse is detected, themark will flash with each pulse beat.

When measurement is complete, the cuff willautomatically deflate, releasing the air in thecuff, and the systolic/diastolic pressure andpulse rate readings with time and date aredisplayed.
• The time and date appear alternately every
2 seconds.

4 Press

to turn off power.

• Measurement results are automatically stored
in memory.

Automatic Power Off Function
The device has an automatic power-down feature, which turns off the power
automatically approximately three minutes after measurement is obtained.

- Eng 18 -

IF YOU DO NOT WISH TO STORE MEASUREMENT RESULTS
Normally, the measurement results are automatically stored. If you
don’t want to store the measurement results, erase them
immediately after measurement according to the procedure below.
* Once stored, measurement results cannot be cleared individually.

1 Press and holdfor more than 2seconds while the measurement
results are displayed.
The message for memory clearance (CL) willappear, and the device will automatically turn off
the power in 2 seconds.

* This step will permanently delete themeasurement results being displayed so that you
cannot undo this action to call up them later.
Before proceeding, make sure that you want todelete them.

- Eng 19 -EnglishHOW TO MEASURE YOUR BLOOD PRESSURE

HOW TO CALL UP DATA STORED IN MEMORY
The automatically stored data (measurement results) can be called
up for reference.
**

The data stored in memory cannot be called up during
measurement.
If the measurement results are not stored, the data in memory
cannot be recalled.
Measurements stored in memory are assigned “a memory
number” in the order of measurement. This means when 90
measurements are stored in memory, the measurement having amemory number of 90 is the most recent.
The device can store up to 90 measurements in its memory.
When more than 90 measurements have been taken, the oldest
measurement will be erased to make room for the most recent
measurement.

- Eng 20 -

1 Press.

The most recent memory number will appear on
the display.
The data in memory (systolic/diastolic pressure
and pulse rate readings, and the date/time of
measurement) will appear on the display.

• The time and date appear alternately every 2
seconds.
• Whenis pressed during display of data

in memory, its monthly average data will becalled up.
• To end the display of data in memory, press.

HOW TO CALL UP PREVIOUS MEASUREMENT RESULTS

1 Pressduring display of data in memory.

Each press will move ONE memory number backward.

• To decrease memory numbers rapidly, keep pressing- Eng 21 -.

EnglishHOW TO CALL UP DATA STORED IN MEMORYHOW TO CALL UP MONTHLY AVERAGE DATA
Monthly average data can be readily called up with the push of abutton.
* If the measurements results are not stored, the monthly
average data cannot be recalled.
The device can store monthly average data of up to 12
months (including the current month). This means when thecurrent month changes from April to May, the monthly
average data of last May will be automatically erased.
If there is no monthly averagedata of the current month, 0(zero) will be shown on thedisplay of the monthly averagevalues (systolic/diastolic bloodpressure, and pulse rate) for thecurrent month.
If the monthly average data of
the pulse rate is out of themeasurement range (pulse rate:
39 pulses/min. or less, or 181
pulses/min. or more), the displayof the pulse rate becomes blank.

- Eng 22 -

1 Press.

The current month’s monthly average data willappear on the display.

• “A” represents average. For example, “A. 5”means “Average of May”.
• If

is pressed during display of monthly

averages of a given month, the month’s mostrecent data in memory can be called up. If suchdata are not stored in memory, the display willremain unchanged.
• To end the monthly average display mode, press.

HOW TO CALL UP PREVIOUS MONTHLY AVERAGE DATA

1 Pressduring display of the current month’s

average data.
Each press will move ONE month backward.

• After reaching the end of all previous months’ average data, it will
loop the display back to the current month’s average data.

- Eng 23 -EnglishHOW TO CALL UP MONTHLY AVERAGE DATAHOW TO DELETE ALL DATA IN MEMORY
All data in memory can be deleted in one operation.

1 Press and holdandsimultaneously for more than 2seconds during display of data inmemory.
The message for all memory data deletion (ALL CL)
will appear on the display. When the deletion
process is complete, the device shuts off
automatically.

**

This step will permanently clear all data from memory. Before
proceeding, make sure you want to clear all data from memory.
Do not remove the battery box while the deletion process is inprogress. Incomplete deletion process may cause damage to thedata memory function.

- Eng 24 -What is blood pressure?
The heart is a pump that circulates
blood throughout your body. Blood is pumped from the heart into thearteries. This pressure is called the arterial blood pressure, which
represents, in general, blood pressure. Blood pressure is indicated byseveral kinds of pressures such as: systolic pressure that occurs when theheart pumps blood; and diastolic pressure that occurs just when blood
returns to the heart.
(Systolic)(Diastolic)ArteryArteryLeft atrium

Left atrium

Left
ventricle The artery wall expands.
Contraction

Leftventricle

Normal state is restored
to the artery wall.
Dilation

Time of day

Blood pressure changes at all times.
Blood pressure differswith age, gender and other factors. Blood pressure of one person is likely tobe affected by biorhythm of a day, posture, physical activities, mental
activities, stress and atmospheric temperatures.
It is said that blood pressure of a healthy person varies by 20 to 50 mmHg
within a day.

Blood pressure value (mmHg)

Systolic blood pressure

Diastolic blood pressure- Eng 25 -EnglishABOUT “BLOOD PRESSURE”

QUESTIONS AND ANSWERS ON BLOOD PRESSURE

Q Why is the blood pressure measured at home different from thatmeasured at the doctors or a hospital?

A When you have a doctor or nurse measure your blood pressure,the pressure value is likely to be 10 to 20 mmHg higher thanusual because of concern and nervousness. To know what
affects blood pressure is crucial to your health monitoring.

Q What is the benefit of measuring bloodpressure at Home?

A Blood pressure measured at home isreliable since it can be measured in astable and relaxed condition. Doctors
lay importance on blood pressure
measurements taken at home. It is
recommended to measure your bloodpressure at the same time on a daily
basis and to record blood pressure variation.
Always consult your physician for interpretation of your bloodpressure readings and proper treatment.
* Improper interpretation of measurement results may worsen
your symptoms. Some individuals with hypertension, diabetes,
Caution kidney disorders, arteriosclerosis or peripheral vasculardisease may see a significant difference in blood pressure
readings taken from the wrist as compared to readings fromthe upper arm.
- Eng 26 -

DISPLAY MARKCONDITION/CAUSE

EnglishERROR INDICATIONSCORRECTIVE ACTION

Appears when the wrist cuff Re-wrap the wrist cuff snugly.
is wrapped too loose.
Take another reading, making
sure you remain still.
(
See page 14 “HOW TO
WRAP THE WRIST CUFF”.)
Appears when your wrist
moved during the measurement.; orAppears when the cuff is
not wrapped correctly.

Re-wrap the wrist cuff corre ctly.
Take another reading, making sure
you rem ain perfec tly stil l.(
See pag e 14 “HO W TO WRA P
THE WRIST CUFF”.)

Appears when the bloodpressure could not bemeasured accurately.

Contact the store where it waspurchased or your local service
center. (See page 30“BEFORE ASKING FORREPAIR/INSPECTION”.)

Appears when the pulse
rate falls outside themeasuring range (below 39
beats/min. or above 181
beats/min.)Re-w rap the wrist cuff pro perly.
Take deep breaths to relax, andmeasure again.
(
See page 13 “POINTS FOR
ACCURATE MEASUREMENT”.)

Appears when the batteries Replace two alkaline batteries
with new ones.
have run out.
(
See page 9 “HOW TOUNLOAD BATTERIES ”.)
The unit does not function Cont act the st or e wher e it waspurcha sed or your local servi ce
properly.
cen ter. (See pa ge 30“BEFOREASKI NGFORREPAIR/INSPECTION”.)- Eng 27 -SPECIFICATIONS
Model Number
Measurement Principle
Measurement Localization
Cuff
Wrist Circumference Range
Measuring Range
Pressure
Pulse
Accuracy
Pressure
Pulse
LCD Indication
Pressure
Pulse
Date / Time
Marks
LCD

SwitchInflation
ExhaustRated Voltage
Power Source
Power Consumption
Battery Life

Viewing Size
Digit Size

CH-671F
Oscillometric Method
Left Wrist
Soft cuff
13.5 to 19.5 cm
0 - 280 mmHg
40 - 180 Pulse / Min.
±3 mmHg±5 % of reading
3 digits
3 digits
4digit with AM/PM mark:Measuring:Battery mark34.5(H) x 29.0(W) mm
SYS/DIA:9.4(H) x 6.5(W) mm /Pulse:5.0(H) x 3.5(W) mm
5 pcs. (Power, Memory, Monthly Average,
Mode, Set)
Automatic inflation by internal pump
Electromagnetic quick exhaust valve
3 V DC
2 “AAA” (LR03) Alkaline batteries
1 W (During inflation)
Approx. 300 times(180 mmHg, 1 time/day, 22°C)- Eng 28 -

Clock Display

Dimensions
WeightOperating Environment Temperature
Humidity
Storage Environment
Temperature
Humidity
Electric Shock Protection
Accessories

Approx. 3 min.
Up to 90 measurements(blood pressure / pulse rate / time & date)Monthly average data of up to 12 months(blood pressure / pulse rate)
Year / Month / Date / Hour(AM/PM) / Minute(Month / Date / Hour / Minute to be
displayed during measurement)
80.5(H) x 58.7(W) x 23.5(T) mm(not including the wrist cuff)
Approx. 100g (not including batteries)
10 to 40 °C
30 to 85%RH-20 to 60 °C
10 to 95%RH
Type B equipment
2 “AAA” Alkaline batteries, Instruction
manual and Storage Case

* Specifications and design may be changed without any notice in the event of
improvements being made.

- Eng 29 -EnglishAuto Power off Function
Memory Function

BEFORE ASKING FOR REPAIR/INSPECTION
Be sure to check the following before sending your blood pressure
monitor for repair/inspection.
Phenomenon

How to repair

Point to be checked

Display gives no
indication evenwhen you press
Power switch.

Check whether batteries
are dead.

Replace all batteries with new
ones.

Check whether batteries
are installed with incorrect
polarity ( + – ).

Load the batteries with correct
polarity.

No measurement ispossible.

Check if theon.

Wrap the wrist cuff properly.

mark has comeCheck if the wrist cuff iswrapped properly.
Did you stay calm during
measurement?

Measure again, making sure toremain still.

Note that measurement of blood pressure may not be possible
for someone with an extremely weak pulse or cardiac arrhythmia(irregular pulses).
If your blood pressure readings are abnormallyhigher or lower than those taken in hospital:

See page 26.

If your blood pressure readings are abnormallyhigh or low:

See pages 13 and 16.

- Eng 30 -

● 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.

6-1-12, Tanashi-cho, Nishi-Tokyo-shi, Tokyo 188-8511, Japan
http://www.citizen-systems.co.jp/
E-mail: sales-oe@systems.citizen.co.jp