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 www.rossmaxhealth.com

Instruction 

Manual

Model: 

 AK150  f

Blood pressure measurements determined with  AK150f are equivalent to 
those obtained by a trained observer using cuff/stethoscope auscultation 
method, within the limits prescribed by the American National Standard 
Manual, Electronic or Automated Sphygmomanometers. This unit is to be 
used by adult consumers in a home environment. Do not use this device 
on infants or neonates.  AK150f is protected against manufacturing de-
fects by an established International Warranty Program. For warranty in-
formation, you can contact the manufacturer, Rossmax International Ltd.

1.  Introduction

Attention:

 

Consult the accompanying documents. Please read this man-

ual carefully before use. For specific information on your own 

blood pressure, contact your physician. Please be sure to keep 

this manual.

2.  Name/Function of Each Part

Arm Cuff

Date/Time Set Key

LCD Display

ON/OFF/START Key

Memory Key

Air Tube and 

Connector

Battery Cover 

(Located on 

back of unit)

4“AA”(R06) size,
1.5V batteries.

AC Adapter 

Jack

Data Link 

Socket

3.  Real Fuzzy Measuring Technology

This unit uses the oscillometric method to detect your blood pressure. Be-

fore the cuff starts inflating, the device will establish a baseline cuff pressure 
equivalent to the air pressure. This unit will determine the appropriate infla

-

tion level based on pressure oscillations, followed by cuff deflation.
During the deflation, the device will detect the amplitude and slope of the 

pressure oscillations and thereby determine for you the systolic blood pres-
sure, diastolic blood pressure, and pulse.

4.  Preliminary Remarks

This Blood Pressure Monitor complies with the European regulations and 

bears the CE mark "CE 0366". The quality of the device has been verified 

and conforms to the provisions of the EC council directive 93/42/EEC (Medi-

cal Device Directive), Annex I essential requirements and applied harmo-

nized standards.
EN 1060-1: 1995/A1: 2002 Non-invasive sphygmomanometers
 - Part 1 - General requirements 
EN 1060-3: 1997/A2: 2009 Non-invasive sphygmomanometers

 - Part 3 -  Supplementary requirements for electro-mechanical blood pressure 

measuring systems

EN 1060-4: 2004 Non-invasive sphygmomanometers
- Part 4 -  Test Procedures to determine the overall system accuracy of auto-

mated non-invasive sphygmomanometers.

This blood pressure monitor was designed for long service 

time. To ensure continued accuracy, it's recommended that 

all digital blood pressure monitors require re-calibration. This 

monitor does not require re-calibration for 2 years under nor-

mal usage with approximately 3 times a day, until, at which 

time your monitor displays 

 . The unit should also be re-calibrated if the 

monitor sustains damage due to blunt force (such as dropping) or exposure 

to fluids and / or extreme hot or cold temperature / humidity changes. When 

 appears, simply return to your nearest dealer for re-calibration service.

5.  Blood Pressure Standard

The National High Blood Pressure Education Program Coordinating 
Committee

 has developed a blood pressure standard, classifying blood pres-

sure ranges into 4 stages. 

(Ref. The Seventh Report 

of the Joint National Committee on Prevention, 

Detection, Evaluation, and Treatment of High Blood 

Pressure-Complete Report JNC-7, 2004) 

This blood 

pressure classification are based on historical data, 

and may not be directly applicable to any particular 

patient. It is important that you consult with your 

physician regularly. Your physician will tell you 

your normal blood pressure range as well as the 

point at which you will be considered at risk. For 

reliable monitoring and reference of blood pres-

sure, keeping long- term records is recommended. 

Please download the blood pressure log at www.

rossmaxhealth.com.

6.  Blood Pressure Fluctuation

Blood pressure fluctuates all 
the time!

You should not be overly worried 
if you encountered two or three 
measurements at high levels. 
Blood pressure changes over the 
month and even throughout the 

day. It is also influenced by season 

and temperature.

Fluctuation within a day

(Case: Male, 35 years old)

Wake

up

Arrive

Discussion

on the

telephone

Argument

in a

meeting

Leave

18:00

24:00

12:00

06:00

50

100

150

200

mmHg

Dinner

/Sleep

Systolic pressure

Diastolic pressure

7.  Display Explanations

1

2
3

7

5

6

4

8

1.

 Memory Mark

2.

 Weak Battery Mark

3.

 Pulse Mark

4.

 Pulse Rate

5.

 Systolic Pressure

6.

 Diastolic Pressure

7.

 Irregular Heartbeat Detector (IHB)

8.

 Date/Time Indicator

8.  Irregular Heartbeat Detector (IHB)

1. Connect the AC adapter with the AC adapter jack in the back of the unit.
2. Plug the AC adapter into the socket. Please use the compatible AC adapt-

ers. (AC adapters with required voltage and current indicated near the AC 
adapter jack.)

Note:

  It is strongly recommended that you con-

sult your physician if the IHB icon ( 

 ) 

appears often.

9.  Using the AC Adapter (Optional)

This unit is equipped with an Irregular Heartbeat 
(IHB) Detector which allows those who have an 
irregular heartbeat to obtain accurate measure-
ments alerting the user of the presence of an ir-
regular heart beat during the measurement.

AC Adapter

(Ø3.8/Ø1.3)

Caution:

    1.  Please unload the batteries when operating with the AC mode 

for a longer period of time. Leaving the batteries in the com-
partment for a long time may cause leakage, which may lead 
to damage of the unit.

                  2.  No batteries are needed when operating with the AC mode.
                  3.  AC adapters are optional. Please contact the distri-butor for the 

compatible AC adapters.

                  4.  Use only the authorized AC Adaptor with this blood pressure 

monitor. Information for the authorized AC adaptor, please 
refer to APPENDIX 1.

10.  Installing Batteries

1.  Press down and lift the battery cover in the direction of the arrow to open 

the battery compartment.

2.  Install or replace 4 “AA” sized batteries in the battery compartment ac-

cording to the indications inside the compartment.

3.  Replace the battery cover by clicking in the bottom hooks first, then push 

in the top end of the battery cover.

4.  As the supplied batteries are for test only, they may be discharged earlier 

than batteries you buy in stores. Replace the batteries in pairs. Remove 
batteries when unit is not in use for extended periods of time.

You need to replace the batteries when:

1. low battery icon appears on display.
2.  the ON/OFF/START key is pressed and nothing appears on display.

Caution:

    1.  Batteries are hazardous waste. Do not dispose them to-

gether with the household garbage.

                  2.  There are no user serviceable parts inside. Batteries or damage 

from old batteries are not covered by warranty.

                  3.  Use  exclusively  brand  batteries.  Always  replace  with  new 

batteries together. Use batteries of the same brand and 
same type. 

11.  Applying the Cuff

1.  Unwrap the arm cuff, leaving the “Index” end of the cuff through the 

D-ring of the cuff.

2.  Put your left arm through the cuff loop. The color strip indication should 

be positioned closer to you with the tube pointing in the direction of 
your arm (Fig.1). Turn your left palm upward and place the edge of the 
arm cuff at approximately 1.5 to 2.5 cm above the inner side of the 
elbow joint (Fig.2). Tighten the cuff by pulling the end of the cuff.

3.  Center the tube over the middle of the arm. Press the hook and loop ma-

terial together securely. Allow room for 2 fingers to fit between the cuff and 

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

your arm. Position the artery mark (   ) over the 

main artery (on the inside of your arm) (Fig.3,4). 

Note:

 Locate the main artery by pressing with 2 fingers approximately 2 

cm above the bend of your elbow on the inside of your left arm. Identify 
where the pulse can be felt the strongest. This is your main artery.
4.  Plug in the cuff connecting tube into the unit (Fig.5).
5.  Lay your arm on a table (palm upward) so the cuff is at the same height as 

your heart. Make sure the tube is not kinked (Fig.6).

6.  This cuff is suitable for your use if the arrow falls within the solid color line 

as shown on the right (Fig.7). If the arrow falls outside the solid color line, 
you will need a cuff with other circumferences. Contact your local dealer for 
additional size cuffs.

EN

CIRCLIFE

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