INSTRUCTION MANUALFORDIGITAL BLOOD PRESSURE MONITORREF CH-308B
IDENTICATION OF PARTS
Exhaust button
Air connector
Pumping bulb tube

Pumping bulb
Systolic blood pressure display section
Diastolic blood pressure/Pulse display section
Air connector

Cuff

POWER switch

Battery cover

Cuff tube

1301- Eng 1 -

3.

GENERAL REMARKS1.

To deflate the cuff quickly, press the “Exhaust button”.

2.

The attached cuff (model SCN-004) is suitable for arm
circumferences of 22-32 cm.
3. When attaching the cuff, adjust the position of the cuff so thatthe blue marker is located in the center of your arm and thehem of the cuff is 1-2 cm above your elbow.
4. The monitor is not intended to be a diagnostic device,because it is intended for home use.
5. Self measurement is not therapy! In no event should youchange the dosage of your medication prescribed by yourphysician.
6. As preparation for measuring your blood pressure, you
should urinate and then remain relatively still for 10 to 15
minutes prior to measurement.
7. Exercising, eating, drinking, smoking, etc., prior to measurement
may affect the results.
8. Your blood pressure varies constantly throughout the day.
Measurements should be taken regularly at the same timeeach day.
9. DO NOT place too much emphasis on the results of one
measurement. Keep a continuing record of your bloodpressure variations. A complete picture can only be obtained
from a large number of readings.
10. Emotional stress tends to cause your blood pressure to rise.

To obtain correct blood pressure measurements
1.

2.

Take five or six deep breaths and then relax before measuring
your blood pressure. If you are tense when taking themeasurement, you will not get a valid reading.
Your blood pressure will be elevated if you are anxious or
irritated, suffering from lack of sleep or constipation, or havejust taken some exercise or eaten a meal.

11. Intended Use• This device is noninvasive blood pressure monitor by
oscillometric method. This device can measure the systolicblood pressure (SYS), the diastolic blood pressure (DIA) andthe pulse rate automatically.
• This device is intended to be used for checking personal
health condition at home under the direction of a physician
and is not intended to be a diagnostic device.
• This device is not intended for use with neonates or infant,and not intended for automatic cycling measurement.

* Your blood pressure changes all the time. This means that data
gathered over a long period has far more significance than datafrom 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.

Remarks:
The graph is not exact,
but may be used as a
guide in understanding
non-invasive bloodpressure measurements.
The device is only
intended for use by
adults.

Grade 2 Hypertension (moderate)
160
Grade 1 Hypertension (mild)
140
130
120

- Eng 2 -High-Normal
NormalOptimal
80 85 90

100

PRECAUTIONS FOR USE AND MAINTENANCE

Frequently repeated blood pressure measurements will notgive accurate results. Allow an interval of about 1 minutebetween measurements.

7.

If you suffer from a severe problem with blood circulation inyour 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 insufficient
blood flow to the area where measurements will be taken or
who suffers from a frequent irregular heartbeat. Consult yourphysician 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 forblood transfusion as part of medical treatment. Doing so
could result in an injury or a serious accident.

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 fire.

1.

If you suffer from heart disease, high blood pressure or othercirculatory disease, consult your physician before using themonitor.

13. DO NOT use mobile phones near the monitor as this could
result in a malfunction.

2.

If the cuff pressure feels abnormal or you experience anyother irregularity while using the cuff, reduce the pressure
immediately by pressing the “Exhaust button”, detach the cuff
or unplug the air hose connector from the monitor and thenconsult the sales outlet where you purchased the monitor.

15. Be sure to use this unit only for measuring blood pressure.
DO NOT use it for any other purpose.

3.

If you think the measurement is abnormal or if measurement
makes you feel unwell, discontinue use and consult yourphysician.

4.

Blood pressure measurement may not be possible for anyone
with a weak pulse or arrhythmia.

110 DIASTOLIC (mmHg)

Definitions and Classifications of Blood Pressure Levels

6.

11. DO NOT use the monitor in the vicinity of flammable gases
such as those used for anaesthesia. Doing so could ignite thegases and cause an explosion.

Precautions for use

180

Repeated blood pressure measurement may cause problems
such as congestion or swelling in some people.

Measure your blood pressure at the same time eachday.

SYSTOLIC (mmHg)
Grade 3 Hypertension (severe)5.

14. If you use a cardiac pacemaker, consult your physician before
using the monitor.

16. Be sure to use only our authorized parts and accessories.
Parts and accessories not approved for use with the device
may damage the unit.
17. DO NOT use this unit on infants.
18. Blood pressure measurement may not be possible foranyone with common arrhythmias such as atrial or ventricularpremature beats or atrial fibrillation.

- Eng 3 -EnglishEnglishGeneral remarks on blood pressure and bloodpressure measurement

Wrap the cuff around your arm and tighten it so that one
finger 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 yourblood pressure.
6. Measure your blood pressure where the room temperature isaround 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.
9. DO NOT measure blood pressure when the cuff has been on
your arm for a few minutes or more. During this time, yourarm will have built up a higher blood pressure and you will not
get valid reading.
10. The figure below shows the blood pressure classifications
under the WHO standards.

Maintenance Precautions
1.

2.

DO NOT drop the blood pressure monitor or subject it toother shocks or vibration.

3.

Remove the batteries if the monitor will be left unused for along period.

Warning

The device has been tested andhomologated in accordance with
EN60601-1-2 for EMC. This does
not guarantee in any way thatthe device will not be affectedby electromagnetic interference.
Avoid using the device in highelectromagnetic environment.

Protect the nature environment:

Name :
Address :6.

If the monitor is very dirty, wipe it clean with a cloth moistenedwith sterilizing alcohol or a neutral detergent. Then wipe itwith a dry cloth.

Please help to protect natural environment by respecting national and/or local
recycling regulations when disposing of the battery and the product at theend of their useful live.

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 hardrubbing, as this will cause air leakages. Take care also not to
get water into the air hose.

If you want to dispose this product, do not mix with generalhousehold waste. There is a separate collection systems for usedelectronics products in accordance with legislation under the WEEE
Directive (Directive 2002/96/EC) and is effective only within European
Union.

Pb(Batteries supplied with the unit should be loaded in compartment
before you use the blood pressure monitor.)

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

Name:
CITIZEN SYSTEMS (H.K.) LIMITED
Address: 62 Hung To Road, Kwun Tong, Kowloon, Hong Kong

DO NOT bend the cuff or the air hose excessively.

: Type BF applied part
: Keep dry: Warning

The blood pressure measuring device is generally recommended to havethe monitor inspected every two years to ensure correct functioning andaccuracy. Please contact a distributor.

LOADING THE BATTERIES

4 “AA” batteries

5.

: The CE marking is meant to provide information tomarket inspectors in the EU member countries.

Calibration:

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.

DO NOT attempt to disassemble the monitor.

Symbols Explanation

The blood pressure measuring device corresponds to regulation EN60601-1,
EN1060-1, EN1060-3, EN1060-4.

Nature and frequency of maintenance:

4.

modification of this device is
Warning No
allowed.

Reference European standard:

Hook

European Representative:

WEEE MARKWvW elektronische Geräte Vertrieb GmbH
Fintelmannstraße 20/Eingang, Martin-Heydert-Straße,
D-14109 Berlin, Germany• For technical data, please contact our European
Representative

Battery
compartment
Batterycover

Lug (projecting section)

Information for Users on Collection and Disposalof used Batteries.
The symbol in this information sheet means that used batteries
should not be mixed with general household waste.
For proper treatment, recovery and recycling of used batteries,
please take them to applicable collection points.
For more information about collection and recycling of batteries,
please contact your local municipality, your waste disposal service or
the point of sale where you purchased the items.

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

Pb

Information on Disposal in other Countries outside theEuropean Union.

: Refer to instruction manual before use

This symbol is only valid in the European Union.
If you wish to discard used batteries, please contact your local authorities ordealer and ask for the correct method of disposal.

: Appliance compliance WEEE directive

Note for the battery symbol.

: Accumulators and battery packs for separate
collection

The symbol might be used in combination with a chemical symbol. In thiscase it complies with the requirement set by the Directive for the chemical
involved.

2 Place batteries in the compartment.
Put the batteries paying attention to the positive and negativeand .
terminal symbols: Manufacturer- Eng 4 -- Eng 5 -EnglishEnglish

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.
Make sure to store the blood pressure monitor, wherechildren, pets and or pests are not there.

3 Close the battery cover.

MEASURING YOUR BLOOD PRESSURE
1

2■ REMOVING THE BATTERIES
is displayed or nothing appears in the display,• When the icon
replace the old batteries with four new ones. All four batteries
should be changed at once.

Unroll the cuff and thread the end
through the metal hoop so that theside with the hook-and-loop fasteneris on the outside.

Relax your arm and lightly open your hand, with thepalm upward.

1-2 cm* The cuff should be put on the bare arm
or over a light-weight underwear.

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

Bluemarker■ Q&A
Q Why is the blood pressure measured at home different from that

* If you wear a heavy-weight top, please
remove it.

4• The memory is erased if the batteries are removed for
replacement. It is recommended to make note of the datastored in memory prior to changing batteries.

6

Blue marker

Metal hoop
Fit the lugs (projections) at
the recesses.

Place your arm on a table or the like, so that the centerof the cuff comes to the height of your heart.

EnglishEnglish1 ATTACHING THE CUFF

Fitting the lugs of the coverat the mating recesses of thebattery compartment body, push
the hook to close the cover.

5

measured by the physician or at a hospital?

Pull the end of the cuff outwards so that the cuff issnug around your arm and then secure the end to thehook-and-loop fastener.

A Your blood pressure may vary due to exercise, the ambient

temperature or your mental state. When you have a physician ornurse 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.

• Do not use rechargeable batteries.
• Do not use alkaline (LR6) and manganese (R6P) batteries
together.
• Batteries included are for demonstration purposes only. Battery
life may be shorter than specified.
• When disposing of used batteries, comply with governmental
regulations or environmental public institution’s rules that apply
in your country/area.

Q Why does the blood pressure obtained vary with measurement?
A Our blood pressure is adjusted by automatic nerve function.
3

Blood pressure differs with every heart beat. We are likely tothink 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 morning and afternoon, season andatmospheric temperature. In addition, blood pressure is easily
affected by mental stress or emotional ups and downs. It tends toincrease when you feel tension or decrease when you are relaxed.

Adjust the position of the cuff so that the blue marker
is located in the center of your arm and the hem of thecuff is 1-2 cm above your elbow.

Always consult your physician for an interpretation ofyour blood pressure readings and to determine theproper treatment.

- Eng 6 -- Eng 7 -

2 Turn Power On

Memory function works on for approximately 2 second or
duringdepressed the “Power” switch.

PULSE / min

KEY TO DISPLAY ICONSPULSE / min

Display mark

SYSTOLIC mmHg DIASTOLIC mmHg
SYSTOLIC mmHg DIASTOLIC mmHg

After memorized blood pressure value is disappeared,
deflation mark “T” appears.

When a pulse is detected, the pressure value moves to theright side of the display. At this time Measuring Mark “ ”
flashes with a short beep at the same time as pulse rate.

PULSE / min

PULSE / min

PULSE / min

SYSTOLIC mmHg DIASTOLIC mmHg

Condition/Cause

Corrective
actionThe cuff was not
inflated to morethan 30-40 mmHg
above your systolicpressure.

Raise theset pressure
value byhigher level.

The cuff was
inflated to morethan 280 mmHg.

Exhaust the
air within thecuff.

PULSE / min
SYSTOLIC mmHg DIASTOLIC mmHg

If there is some air remaining in the cuff, release air with theexhaust button until the “0” appears. The buzzer beeps threetimes.
The unit is now ready to take new measurement.

Cuff Tube

Press the “Power” switch
for Power on.

3 Pressurize the cuff

SYSTOLIC mmHg DIASTOLIC mmHg

When the diastolic pressure valve is detected, themeasurement is completed and buzzer beep.
Systolic pressure is displayed on the left and diastolicpressure on the right side of the display.
After completion of measurement, the mark “T” appears.

SYSTOLIC mmHg DIASTOLIC mmHg
PULSE / min

PULSE / min

PULSE / min

SYSTOLIC mmHg DIASTOLIC mmHg
PULSE / min
SYSTOLIC mmHg DIASTOLIC mmHg

PULSE / min
SYSTOLIC mmHg DIASTOLIC mmHg

SYSTOLIC mmHg

Pressurize the cuff by pumping bulb until you have a readingof approximately 30 to 40 mmHg higher than your regularsystolic blood pressure.
Note: At pressure of 140,170, 200, 240 mmHg, the buzzer
beeps two times.

DIASTOLIC mmHg

All display mark appear for approx. 1 second and buzzer
beeps.
PULSE / min

PULSE / min

SYSTOLIC mmHg DIASTOLIC mmHg

SYSTOLIC mmHg DIASTOLIC mmHg

After all display marks are disappeared, the last measured
systolic and diastolic blood pressure values are displayed.
(Value of Pulse is not memorized nor displayed).

- Eng 8 -When pressurization is completed, the automatic theautomatic air release system will gradually reduce cuff
pressure, and Measuring Mark “ ” will appear on the display
indication that measurement is in progress.

Approximately 2 seconds later, blood pressure values andpulse appear alternatively on the display.
SYSTOLIC mmHg DIASTOLIC mmHg

4 Press the exhaust button

Appears when the
blood pressurecould
not be measured
accurately.
Repeat“PUL Err” isdisplayed when
the pulse value
is below 40 orabove 201.

measurement
again.

PULSE / min

Press the exhaust button valve to completely release the air
in the cuff.

5 Power off

Appears when
the battery
becomes weak.

Replace thebattery.

Device has atrouble.

Askpurchased
shop.

SYSTOLIC mmHg DIASTOLIC mmHg
PULSE / min

Press the “POWER” switch to turn off.
About 3 minutes after the last measurement was obtained,
the power will be turned off, automatically.

SYSTOLIC mmHg DIASTOLIC mmHg

- Eng 9 -EnglishEnglishPush the cuff tube and Pumping bulb tube over the airconnectors.
Pumping bulb tube

BEFORE REQUESTING REPAIRS OR TESTING
EnglishMake sure to check the following before sending your bloodpressure monitor away to be tested or repaired.
Problem

ChecksResponse

Display stays
blank when
you press the“POWER”
switch.

Check whether
the batteries are
dead.

Replace all the batteries
with new ones.

Check whether
the batteries are
installed the rightway round (and oriented
correctly).

Load the batteries in thecorrect direction.

Nomeasurements
can be taken.

Check whether
the measurement
is
icon
displayed.

Attach the cuff properly.

Check whether
the cuff isattached 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 weakpulse or cardiac arrhythmia (irregular pulse).
Your blood pressure readings areabnormally high or low comparedwith those taken in hospital.
Other phenomena

SPECIFICATIONS
Measurement system:
Measurement Localization
Cuff:
Arm circumference range:
Pressure
Measurement range:
Pulse
Pressure
Accuracy:
Pulse
Pressure
Pulse
LCD displays:
Icons

Oscillometric method
Upper Arm
Soft cuff
22.0 to 32.0 cm
0 to 280 mmHg
40 to 200 pulse/min±3 mmHg±5% of reading
3 digits
3 digits
Exhaust: T
Measuring:
Re-Measure: S Battery:
Switch:POWER switch
Inflation:
Manual lnflation by Pumping Bulb
Deflation:
Air release system
6 V DC
0.1 W (:
Rated voltage:
direct current)
Exhaust:
Quick Exhaust Valve
Power supply:
4 “AA” Size Batteries
Approx. 1000 times ManganeseBattery duration:(160 mmHg, 1 time / day, 22°C)
Automatic Power Off function:
Approx. 3 min. (after activated)
Dimensions:
123 (W) x 95 (D) x 44 (H) mm
Weight: (Apparatus and batteries)
Approx. 410 g
Temperature 10°C to 40°C
Operating conditions:
Humidity 30% to 85% RH
Temperature -20°C to 60°C
Storage conditions:
Humidity 10% to 95% RH
Electric shock protection:
Internal power unit
Degree of Protection
Type BF applied partMode of operation:
Continuous operation
Service Life:
Cuff’s Life:See Q & A

Remove the batteries fromthe unit and change themwith new ones.

5 years
Approx. 2000 times

Accessories: Set includes a cuff, Pump, 4 AA batteries (R6P) for themonitor, Instruction Manual.
* Applied part for this device is Cuff.
* A range in barometoric pressure 105 kPa to 70 kPa• Overall system accuracy of this device is met with the requirement of
item 7.9 of EN1060-3.
EN1060-3 : Non-invasive sphygmomanometers Part 3 (European
Standard)- Eng 10 -