Citizen REF CH-308B Instruction Manual Download Page 6

- Eng 10 -

English

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 
“POWER” 
switch.

Check whether 
the batteries are 
dead.

Replace all the batteries 
with new ones.

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

Load the batteries in the 
correct direction.

No 
measurements 
can be taken.

Check whether 
the measurement 
icon   is 
displayed.

Attach the cuff properly.

Check whether 
the cuff is 
attached correctly.

Did you stay 
calm during 
measurement?

Measure your blood 
pressure 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 pulse).

Your blood pressure readings are 
abnormally high or low compared 
with those taken in hospital.

 See Q & A

Other phenomena

Remove the batteries from 
the unit and change them 
with new ones.

SPECIFICATIONS

Measurement system:

Oscillometric method

Measurement Localization

Upper Arm

Cuff:

Soft cuff

Arm circumference range:

22.0 to 32.0 cm

Measurement range:

Pressure

0 to 280 mmHg

Pulse

40 to 200 pulse/min

Accuracy:

Pressure

±3 mmHg

Pulse

±5% of reading

LCD displays:

Pressure

3 digits

Pulse

3 digits

Icons

Measuring: 

 Exhaust: 

T

 

Re-Measure: 

S

 Battery: 

Switch:

POWER switch

In

fl

 ation:

Manual ln

fl

 ation by Pumping Bulb

De

fl

 ation:

Air release system

Rated voltage:

6 V DC  

 0.1 W (

 : 

direct current)

Exhaust:

Quick Exhaust Valve

Power supply:

4 “AA” Size Batteries 

Battery duration:

Approx. 1000 times Manganese 
(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 

Operating conditions:

Temperature 10°C to 40°C
Humidity

30% to 85% RH

Storage conditions:

Temperature -20°C to 60°C
Humidity

10% to 95% RH

Electric shock protection:

Internal power unit

Degree of Protection

 Type BF applied part

Mode of operation:

Continuous operation

Service Life:

5 years

Cuff’s Life:

Approx. 2000 times

Accessories

:

  Set includes a cuff, Pump, 4 AA batteries (R6P) for the 

monitor, 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)

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