Citizen REF CH-308B Instruction Manual Download Page 2

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GENERAL REMARKS

General remarks on blood pressure and blood 
pressure measurement

1. To 

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 ate 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 that 

the blue marker is located in the center of your arm and the 
hem 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 you 

change the dosage of your medication prescribed by your 
physician.

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 time 
each day.

9.  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.

10.  Emotional stress tends to cause your blood pressure to rise.

To obtain correct blood pressure measurements

1.  Take 

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 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 

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 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.

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 

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 gure below shows the blood pressure classi

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 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 by 
adults.

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 nitions and Classi

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 cations of Blood Pressure Levels

SYSTOLIC (mmHg)

180

160

140

130

120

80 85 90

100

110 DIASTOLIC (mmHg)

Grade 3 Hypertension (severe)

Grade 2 Hypertension (moderate)

Grade 1 Hypertension (mild)

High-Normal

Normal

Optimal

11. Intended Use

•  This device is noninvasive blood pressure monitor by 

oscillometric method. This device can measure the systolic 
blood pressure (SYS), the diastolic blood pressure (DIA) and 
the 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.

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 signi

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 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.

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 “Exhaust button”, detach the cuff 
or unplug the air hose connector from the monitor 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 1 minute 
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 insuf

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 cient 

blood 

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 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 

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 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 

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 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.

15.  Be sure to use this unit only for measuring blood pressure. 

DO NOT use it for any other purpose.

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 for 

anyone with common arrhythmias such as atrial or ventricular 
premature beats or atrial 

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 brillation.

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