Andon KD-7908 User manual

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
1/15
MODEL KD-7908
Fully Automatic Wrist Cuff Blood Pressure Monitor
(ELECTRONIC SPHYGMOMANOMETER)
OPERATION GUIDE
INDEX
IMPORTANT INFORMATION .....................................................................................................................................2
PARTS AND DISPLAY INDICATORS........................................................................................................................2
INTENDED USE ...........................................................................................................................................................3
CONTRAINDICATION..................................................................................................................................................3
PRODUCT DESCRIPTION.........................................................................................................................................3
SPECIFICATIONS........................................................................................................................................................3
NOTICE..........................................................................................................................................................................4
SETUPAND OPERATING PROCEDURES.............................................................................................................5
1. BATTERY LOADING ........................................................................................................................................5
2. CLOCKAND DATE ADJUSTMENT................................................................................................................6
3. CONNECTING THE CUFF TO THE MONITOR .............................................................................................6
4. APPLYING THE CUFF ......................................................................................................................................6
5. BODY POSTURE DURING MEASUREMENT................................................................................................7
6. TAKING YOUR BLOOD PRESSURE READING............................................................................................7
7. DISPLAYING STORED RESULTS ...................................................................................................................8
8. DELETING MEASUREMENTS FROM THE MEMORY ................................................................................9
9. ASSESSING HIGH BLOOD PRESSURE FORADULTS.................................................................................9
10. TECHNICALALARM DESCRIPTION.....................................................................................................9
11. TROUBLESHOOTING (1).......................................................................................................................10
12. TROUBLESHOOTING (2).......................................................................................................................10
MAINTENANCE..........................................................................................................................................................11
EXPLANATION OF SYMBOLS ON UNIT...............................................................................................................11
WARRANTY INFORMATION....................................................................................................................................12
SERVICE CENTER....................................................................................................................................................12
ELECTROMAGNETIC COMPATIBILITY INFORMATION....................................................................................12

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
2/15
IMPORTANT INFORMATION
NORMAL BLOOD PRESSURE FLUCTUATION
All physical activity, excitement, stress, eating, drinking, smoking and many other activities or factors (including
taking a blood pressure measurement) will influence blood pressure value. Because of this, it is mostly unusual
to obtain identical multiple blood pressure readings.
Blood pressure fluctuates continually day and night. The highest value usually appears in the daytime and lowest
one usually at midnight. Typically, the value begins to increase at around 3:00AM, and reaches to highest level in
the daytime while most people are awake and active.
Considering the above information, it is recommended that you measure your blood pressure at approximately
the same time each day.
Too frequent measurements may cause injury due to blood flow interference, please always relax a minimum
moment of 3 to 5 minutes between measurements to allow the blood circulation in your arm to recover. It is rare
that you obtain identical blood pressure readings each time.
PARTS AND DISPLAY INDICATORS
MEM button
START button
LCD display
Blood pressure level
classification indicator

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
3/15
INTENDED USE
Fully Automatic Electronic Blood Pressure Monitor is for use by medical professionals or at home and is a
non-invasive blood pressure measurement system intended to measure the diastolic and systolic blood
pressures and pulse rate of an adult individual by using a non-invasive technique in which an inflatable cuff is
wrapped around the wrist.
CONTRAINDICATION
It is inappropriate for people with serious arrhythmia to use this Electronic Blood pressure monitor.
PRODUCT DESCRIPTION
Based on Oscillometric methodology and silicon integrated pressure sensor, blood pressure and pulse rate can
be measured automatically and non-invasively. The LCD display will show blood pressure and pulse rate. The
most recent 2x60 measurements can be stored in the memory with date and time stamp. The monitor can also
show the average reading of the last thirty measurements. The blood pressure monitor corresponds to the below
standards:IEC 60601-1:2005/EN 60601-1:2006/AC:2010 (Medical electrical equipment -- Part 1: General
requirements for basic safety and essential performance), IEC60601-1-2:2007/EN 60601-1-2:2007 /AC:2010
(Medical electrical equipment -- Part 1-2: General requirements for basic safety and essential performance -
Collateral standard: Electromagnetic compatibility - Requirements and tests), IEC 80601-2-30 ：
2009+Cor.2010/EN 80601-2-30:2010(Medical electrical equipment –Part 2-30: Particular requirements for the
basic safety and essential performance of automated non-invasive sphygmomanometers)EN 1060-1: 1995 + A1:
2002 + A2: 2009 (Non-invasive sphygmomanometers - Part 1: General requirements), EN 1060-3: 1997 + A1:
2005 + A2: 2009 (Non-invasive sphygmomanometers - Part 3: Supplementary requirements for
electro-mechanical blood pressure measuring systems),ANSI/AAMI SP-10:2002+A1:2003+A2:2006.
SPECIFICATIONS
1. Product name: Blood Pressure Monitor
2. Model: KD-7908
3. classification: Internally powered, type BF applied part,IPX0,No AP orAPG,Continuous operation
4. Machine size: 66 mm x 88 mm x 30 mm
5. Cuff circumference: 13.5cm ~ 22cm
6. Weight: about 124g (exclude batteries and cuff)
7. Measuring method: oscillometric method, automatic air inflation and measurement
8. Memory volume: 2x60 times with time and date stamp
9. Power source: batteries: 2 ×1.5V SIZEAAA

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
4/15
10. Measurement range:
Cuff pressure: 0-300mmHg
Systolic: 60-260mmHg
Diastolic: 40-199mmHg
Pulse rate: 40-180 beats/minute
11. Accuracy:
Pressure: ±3mmHg
Pulse rate: ±5%
12. Environmental temperature for operation: 5℃～40℃(41℉～104℉)
13. Environmental humidity for operation: ≤90%RH
14. Environmental temperature for storage: -20℃～55℃(-4℉～131℉)
15. Environmental humidity for storage: ≤90%RH
16. Environmental pressure: 80kPa-105kPa
17. Battery life: Approx. 270 times
18. All components belonging to the pressure measuring system, including accessories: Pump, Valve, LCD, Cuff
and Sensor.
Note: These specifications are subject to change without notice.
NOTICE
1. Read all of the information in the operation guide and any other literature in the box before operating the unit.
2. Stay quiet, calm and rest for 5 minutes before blood pressure measurement.
3. The cuff should be placed at the same level as your heart.
4. During measurement, neither speak nor move your body and arm.
5. Measuring on same wrist for each measurement.
6. Please always relax at least 1 or 1.5 minutes between measurements to allow the blood circulation in your
arm to recover. Prolonged over-inflation (cuff pressure exceed 300 mmHg or maintained above15 mmHg for longer
than 3 minutes) of the bladder may cause ecchymoma of your arm.
7. Consult your physician if you have any doubt about below cases:
1) The application of the cuff over a wound or inflammation diseases;
2) The application of the cuff on any limb where intravascular access or therapy, or an arterio-venous (A-V)
shunt, is present;
3) The application of the cuff on the arm on the side of a mastectomy;
4) Simultaneously used with other monitoring medical equipments on the same limb;
5) Need to check the blood circulation of the user.
8. This blood pressure monitor is designed for adults and should never be used on infants or young children.
Consult your physician or other health care professionals before use on older children.
9. Do not use this unit in a moving vehicle, This may result in erroneous measurement.
10. Blood pressure measurements determined by this monitor are equivalent to those obtained by a trained
observer using the cuff/stethoscope auscultation method, within the limits prescribed by the American
National Standard, Electronic or automated sphygmomanometers.

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
5/15
11. Information regarding potential electromagnetic or other interference between the blood pressure monitor
and other devices together with advice regarding avoidance of such interference please see part
ELECTROMAGNETIC COMPATIBILITY INFORMATION.
12. If Irregular Heartbeat (IHB) brought by common arrhythmias is detected in the procedure of blood pressure
measurement, a signal of will be displayed. Under this condition, the blood pressure monitor can keep
function, but the results may not be accurate, it’s suggested that you consult with your physician for accurate
assessment.
There are 2 conditions under which the signal of IHB will be displayed:
1) The coefficient of variation (CV) of pulse period >25%.
2) The difference of adjacent pulse period≥0.14s, and the number of such pulse takes more than 53
percentage of the total number of pulse.
13. Please do not use the cuff other than supplied by the manufacturer, otherwise it may bring biocompatible
hazard and might result in measurement error.
14. The monitor might not meet its performance specifications if stored or used outside the specified
temperature and humidity ranges in specifications.
15. Please do not share the cuff with other infective person to avoid cross-infection.
16. This blood pressure monitor is verified by auscultatory method. It is recommended that you check annex B of
ANSI/AAMI SP-10:2002+A1:2003+A2:2006 for details of verification method if you need.
17. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
SETUP AND OPERATING PROCEDURES
1.BATTERY LOADING
a. Open battery cover at the back of the monitor.
b. Load two ―AAA‖ size batteries. Please pay attention to polarity.
c. Close the battery cover.
When LCD shows battery symbol , replace all batteries with new ones.
Rechargeable batteries are not suitable for this monitor.
Remove the batteries if the monitor will not be used for a month or more to avoid relevant damage of
battery leakage

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
6/15
Avoid the battery fluid to get in your eyes. If it should get in your eyes, immediately rinse with plenty of
clean water and contact a physician.
The monitor, the batteries and the cuff, must be disposed of according to local regulations at the
end of their usage.
2. CLOCK AND DATE ADJUSTMENT
a. Once you install the battery or turn off the monitor, it will enter Clock Mode, and LCD will display time
and date by turns. See picture 2&2-1.
Picture 2 Picture 2-1
b. While the monitor is in Clock Mode, pressing both the ―START‖ and ―MEM‖ button simultaneously, the
month will blink at first. See picture 2-2. Press the button ―START‖ repeatedly, the day, hour and minute
will blink in turn. See picture 2-3 & 2-4 & 2-5. While the number is blinking, press the button ―MEM‖ to
increase the number. Keep on pressing the button "MEM", the number will increase fast.
Picture 2-2 Picture 2-3 Picture 2-4 Picture 2-5
c. You can turn off the monitor by pressing ―START‖ button when the minute is blinking, then the time and
date is confirmed.
d. The monitor will turn off automatically after 1 minute of no operation, with the time and date unchanged.
e. Once you change the batteries, you should readjust the time and date.
3. CONNECTING THE CUFF TO THE MONITOR
The cuff is attached to the monitor when it is packaged. Should the cuff
become unattached, align the two plugs and four brackets of the cuff with the
plug sockets and bracket sockets of the monitor and press the cuff to the
monitor until the plugs and brackets are securely attached.
4. APPLYING THE CUFF
a. Place the cuff around a bare wrist 1-2cm above the wrist joint on the palm side of the wrist.

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
7/15
b. While seated, place the arm with the cuffed wrist in front of your body on a desk or table
with the palm up. If the cuff is correctly placed, you can read the LCD display.
c. The cuff must be neither too tight nor too loose.
Note:
Please refer to the cuff circumference range in ―SPECIFICATIONS‖ to make sure
that the appropriate cuff is used.
Measuring on same wrist each time.
Do not move your arm, body, or the monitor during measurement.
Stay quiet, calm for 5 minutes before blood pressure measurement.
Please keep the cuff clean. If the cuff becomes dirty, remove it from the monitor and clear it by
hand in a mild detergent, then rinse it thoroughly in cold water. Never dry the cuff in clothes dryer
or iron it. Clean the cuff after the usage of every 200 times is recommended.
5. BODY POSTURE DURING MEASUREMENT
Sitting Comfortably Measurement
a. Be seated with your feet flat on the floor, and don’t cross your legs.
b. Place palm upside in front of you on a flat surface such as a desk or table, with
your elbow resting on a chair or table
c. The middle of the cuff should be at the level of the right atrium of the heart.
6. TAKING YOUR BLOOD PRESSURE READING
a. After applying the cuff and your body is in a comfortable position, press the ―START‖ button. A beep
is heard and all display characters are shown for self-test. See picture 6.
Picture 6 Picture 6-1 Picture 6-2
b. Then the current memory bank (U1 or U2) is displayed. See picture 6-1. Press ―MEM‖ button to
change over to other bank. See picture 6-2. Confirm your selection by pressing ―START‖ button. The
current bank can also be confirmed automatically after 5 seconds with no operation.
c. After selecting the memory bank, the monitor starts to seek zero pressure. See picture 6-3.
Picture 6-3 Picture 6-4 Picture 6-5

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
8/15
d. The monitor inflates the cuff until sufficient pressure has built up for a measurement. Then the
monitor slowly releases air from the cuff and carries out the measurement. Finally the blood pressure
and pulse rate will be calculated and displayed on the LCD screen separately. Irregular heartbeat
symbol (if any) will blink. See picture 6-4&6-5. The result will be automatically stored in the memory
bank.
e. After measurement, the monitor will turn off automatically after 1 minute of no operation. Alternatively,
you can press the ―START‖ button to turn off the monitor manually.
f. During measurement, you can press the ―START‖ button to turn off the monitor manually.
Note: Please consult a health care professional for interpretation of pressure measurements.
7. DISPLAYING STORED RESULTS
a. In Clock Mode, press ―MEM‖ button, the current memory bank and the amount of results in this bank will
be displayed. See picture 7. Press ―START‖ button to change over to other bank. See picture 7-1.
Confirm your selection by pressing ―MEM‖ button. The current bank can also be confirmed automatically
after 5 seconds with no operation.
Picture 7 Picture 7-1
b. After selecting the memory bank, the LCD will display the average value of the last thirty results in this
bank, See picture 7-2 &7-3. If no result stored, LCD will show dashes as picture 7-4.
Picture 7-2 Picture 7-3 Picture 7-4 Picture 7-5
c. When the average value is displayed, press the ―MEM‖ button, the most recent result will be displayed.
See picture 7-5. Followed by, the blood pressure and pulse rate will be shown separately. Irregular
heartbeat symbol (if any) will blink. See picture 7-6&7-7. Press ―MEM‖ button again to review the next
result. See picture 7-8. In this way, repeatedly pressing the ―MEM‖ button displays the respective results
measured previously.

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
9/15
Picture 7-6 Picture 7-7 Picture 7-8
d. When displaying the stored results, the monitor will turn off automatically after 1 minute of no operation.
You can also press the button ―START‖ to turn off the monitor manually.
8. DELETING MEASUREMENTS FROM THE MEMORY
When any result is displaying (exclude average value displaying), keep on pressing button
―MEM‖ for three seconds, all results in the current memory bank will be deleted after three
―beep‖. LCD will show picture 8, Press the button ―MEM‖ or ―START‖, the monitor will turn off.
Picture 8
9. ASSESSING HIGH BLOOD PRESSURE FOR ADULTS
The following guidelines for assessing high blood pressure (without regard to age or gender) have been
established by the World Health Organization (WHO). Please note that other factors (e.g. diabetes, obesity,
smoking, etc.) need to be taken into consideration. Consult with your physician for accurate assessment, and
never change your treatment by yourself.
Note: It is not intended to provide a
basis of any type of rush toward
emergency conditions/diagnosis based
on the color scheme and that the color
scheme is meant only to discriminate
between the different levels of blood
pressure.
10. TECHNICAL ALARM DESCRIPTION
The monitor will show 'SYS HI','SYS Lo' ,'DIA HI' or 'DIA Lo' as technical alarm on LCD with no delay if the
determined blood pressure (systolic or diastolic) is outside the rated range specified in part SPECIFICACIONS.
In this case, you should consult a physician or check if your operation violated the instructions.
The technical alarm condition (outside the rated range) is preset in the factory and cannot be adjusted or
inactivated. This alarm condition is assigned as low priority according to IEC 60601-1-8.
The technical alarm is non-latching and need no reset. The signal displayed on LCD will disappear automatically
after about 8 seconds.

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
10/15
11. TROUBLESHOOTING (1)
PROBLEM
POSSIBLE CAUSE
SOLUTION
LCD Display shows
abnormal result
The cuff position was not correct
or it was not properly tightened
Apply the cuff correctly and
try again
Body posture was not correct
during testing
Review the ―BODY
POSTURE DURING
MEASUREMENT‖ sections
of the instructions and
re-test.
Speaking, arm or body
movement, angry, excited or
nervous during testing
Re-test when calm and
without speaking or moving
during the test
Irregular heartbeat
It is inappropriate for people
with serious arrhythmia to
use this blood pressure
monitor.
12. TROUBLESHOOTING (2)
PROBLEM
POSSIBLE CAUSE
SOLUTION
LCD shows low battery
symbol
Low Battery
Change the batteries
LCD shows ―Er 0‖
Pressure system is unstable
before measurement
Don’t move and try again.
LCD shows ―Er 1‖
Fail to detect systolic pressure
LCD shows ―Er 2‖
Fail to detect diastolic pressure
LCD shows ―Er 3‖
Pneumatic system blocked or cuff
is too tight during inflation
Apply the cuff correctly and
try again
LCD shows ―Er 4‖
Pneumatic system leakage or
cuff is too loose during inflation
LCD shows ―Er 5‖
Cuff pressure above 300mmHg
Measure again after five
minutes. If the monitor is
still abnormal, please
contact the local distributor
or the factory.
LCD shows ―Er 6‖
More than 160 seconds with cuff
pressure above 15 mmHg
LCD shows ―Er 7‖
EEPROM accessing error
LCD shows ―Er 8‖
Device parameter checking error
LCD shows ―Er A‖
Pressure sensor parameter error
No response when you
press button or load
battery.
Incorrect operation or strong
electromagnetic interference.
Take out batteries for five
minutes, and then reinstall
all batteries.

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
11/15
MAINTENANCE
1. Do not drop this monitor or subject it to strong impact.
2. Avoid high temperature and solarization. Do not immerse the monitor in water as this will result in
damage to the monitor.
3. If this monitor is stored near freezing, allow it to acclimate to room temperature before use.
4. Do not attempt to disassemble this monitor.
5. If you do not use the monitor for a long time, please remove the batteries.
6. It is recommended the performance should be checked every 2 years or after repair. Please contact the
service center.
7. Clean the monitor with a dry, soft cloth or a soft cloth squeezed well after moistened with water, diluted
disinfectant alcohol, or diluted detergent.
8. No component can be maintained by user in the monitor. The circuit diagrams, component part lists,
descriptions, calibration instructions, or other information which will assist the user’s appropriately qualified
technical personnel to repair those parts of equipment which are designated repairably can be supplied
9. The monitor can maintain the safety and performance characteristics for a minimum of 10,000
measurements or three years, and the cuff integrity is maintained after 1,000 open–close cycles of the
closure.
10. It is recommended the cuff should be disinfected 2 times every week if needed (For example, in hospital or
in clinique). Wipe the inner side (the side contacts skin) of the cuff by a soft cloth squeezed after moistened
with Ethyl alcohol (75-90%), then dry the cuff by airing.
EXPLANATION OF SYMBOLS ON UNIT
Symbol for‖ THE OPERATION GUIDE MUST BE READ‖(The sign background colour: blue.The sign
graphical symbol: white)
Symbol for ―WARNING‖
Symbol for ―TYPE BF APPLIED PARTS‖ (The cuff is type BF applied part)
Symbol for ―ENVIRONMENT PROTECTION – Waste electrical products should not be disposed of with
household waste. Please recycle where facilities exist. Check with your local Authority or retailer for recycling
advice‖.
Symbol for ―MANUFACTURER‖
Symbol for ―COMPILES WITH MDD93/42/EEC REQUIREMENTS‖
Symbol for ―DATE OF MANUFACTURE‖

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
12/15
NO. 31,Changjiang Road,Nankai District,Tianjin, P.R.China
EC REP
ANDON Health Co.,Ltd
AUTOMATIC BLOOD PRESSURE MONITOR
MODEL: KD-5907
6V
SN:
R
0197
Lotus Global Co.,Ltd
47 Spenlow House Bermondsey London SE16 4SJ
Symbol for ―EUROPEAN REPRESENTATION‖
SN Symbol for ―SERIAL NUMBER‖
Symbol for ―KEEP DRY‖
WARRANTY INFORMATION
Only charge the cost of components and transport.
SERVICE CENTER
ANDON HEALTH CO., LTD.
No. 3 Jinping Street, Ya An Road, Nankai District, Tianjin 300190, China.
Tel: [phone]
Lotus Global Co., Ltd.
15 Alexandra Road, London UK, NW8 0DP
Tel: [phone] Fax: [phone]
ELECTROMAGNETIC COMPATIBILITY INFORMATION
Table 1
For all ME EQUIPMENT and ME SYSTEMS
Guidance and manufacture’s declaration - electromagnetic emissions
The KD-7908 is intended for use in the electromagnetic environment specified below.
The customer or the user of the KD-7908 should assure that it is used in such an
environment.
Emissions test
Compliance
Electromagnetic environment -
guidance
RF emissions
CISPR 11
Group 1
The KD-7908 uses RF energy only for its
internal function. Therefore, its RF
emissions are very low and are not likely
to cause any interference in nearby
electronic equipment.
RF emissions
CISPR 11
Class B
The KD-7908 is suitable for use in all
establishments other than domestic and
those directly connected to the public
low-voltage power supply network that
supplies buildings used for domestic
Harmonic emissions
IEC 61000-3-2
Not applicable
Voltage fluctuations/
Not applicable
NO. 31,Changjiang Road,Nankai District,Tianjin, P.R.China
EC REP
ANDON Health Co.,Ltd
AUTOMATIC BLOOD PRESSURE MONITOR
MODEL: KD-5907
6V
SN:
R
0197
Lotus Global Co.,Ltd
47 Spenlow House Bermondsey London SE16 4SJ

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
13/15
flicker emissions
IEC 61000-3-3
purposes.
Table 2
For all ME EQUIPMENT and ME SYSTEMS
Guidance and manufacturer’s declaration - electromagnetic immunity
The KD-7908 is intended for use in the electromagnetic environment specified below. The
customer or the user of the KD-7908 should assure that it is used in such an environment.
IMMUNITY test
IEC 60601test level
Compliance level
Electromagnetic
environment -
guidance
Electrostatic
discharge (ESD)
IEC 61000-4-2
±6 kV contact
±8 kV air
±6 kV contact
±8 kV air
Floors should be
wood, concrete
or ceramic tile. If
floors are
covered with
synthetic
material, the
relative humidity
should be at least
30 %.
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m
3 A/m
Power frequency
magnetic fields
should be at
levels
characteristic of a
typical location in
a typical
commercial or
hospital
environment.
Table 3
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Guidance and manufacturer’s declaration - electromagnetic immunity
The KD-7908 is intended for use in the electromagnetic environment specified below. The
customer or the user of the KD-7908 should assure that it is used in such an environment.
IMMUNITY test
IEC 60601test level
Compliance
level
Electromagnetic environment
- guidance
Portable and mobile RF
communications equipment
should be used no closer to any
part of the KD-7908, including
cables, than the recommended
separation distance calculated
from the equation applicable to

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
14/15
Radiated RF
IEC 61000-4-3
3 V/m 80 MHz to 2.5
GHz
3 V/m
the frequency of the transmitter.
Recommended separation
distance：
80 MHz to 800
MHz
800 MHz to 2,5
GHz
Where P is the maximum output
power rating of the transmitter
in watts (W) according to the
transmitter manufacturer and d
is the recommended separation
distance in meters (m).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site survey,a
should be less than the
compliance level in each
frequency range.b
Interference may occur in the
vicinity of equipment
marked with the following
symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV
broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be
considered. If the measured field strength in the location in which the KD-7908 is used
exceeds the applicable RF compliance level above, the KD-7908 should be observed to
verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the KD-7908.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Table 4
For ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
Pd 2.1
Pd 3.2

DN:KD-7908-SMSY01 V2.0 Operation Guide
Template version:1
15/15
Recommended separation distances between
portable and mobile RF communications equipment and the KD-7908
The KD-7908 is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the KD-7908 can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the KD-7908 as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum
output
power of
transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2,5 GHz
0,01
0.12
0.12
0.23
0,1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be determined using the equation applicable to the
frequency of the transmitter, where P is the maximum output power rating of the transmitter
in watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
Pd 2.1
Pd 2.1
Pd 3.2