AngelSounds JPD-100S User Manual

JPD-100S（mini）

Fetal Doppler

INSTRUCTION MANUAL

0482

Manual Version: V1.1
Issuing Date: 2012.11.2

2

Product Information

Product Name: Fetal Doppler

Model: JPD-100S（mini）
Manufacturer: Shenzhen Jumper Medical Equipment Co., Ltd
Address: 5th Floor Building No. 34, Baoyuan Industrial Zone,
Xixiang Street, Baoan District, Shenzhen 518102 ,P.R. China

Copyright

Copyright2010. All rights reserved.

Statement

Shenzhen Jumper Medical Equipment Co., Ltd owns the
copyright of this non-public instruction book.
Without written authorization from Shenzhen Jumper Medical
Equipment Co., Ltd, any individual or organization shall not
copy, modify or translate this book.
All contents described in this book are consistent with the actual
situation of the related product.
Shenzhen Jumper Medical Equipment Co., Ltd has right to
revise all contents of this book if needed, without prior notice.
Shenzhen Jumper Medical Equipment Co., Ltd reserves the
right of final interpretation of this book.

"ANGELSOUNDS" is the registered trademark of Shenzhen
Jumper Medical Equipment Co., Ltd.

2

Precaution Labels Definition

The signal words shown below, left, identify the potential hazard
categories. The definition of each category is as follows:

DANGER: This alert identifies hazards that will
cause serious personal injury or death.

WARNING: This alert identifies hazards that may
cause serious personal injury or death.

CAUTION: This alert identifies hazards that may
cause minor personal injury, product damage, or
property damage.

NOTE: The label indicates what you should attention.

2

Table of contents

SECTION 1: INSTRUCTION..................................................... 1

1.1 CONTACT INFORMATION......................................................1

1.2 INDICATION FOR USE.......................................................... 2

1.3 PRODUCT DESCRIPTION..................................................... 3

1.4 OPERATING PRINCIPLE.......................................................3

1.5 CONTRAINDICATIONS FOR USE............................................4

1.6 ADVERSE EFFECTS.............................................................4

SECTION 2: SAFETY GUIDANCE...........................................5

2.1 SAFETY ALERT DESCRIPTIONS..............................................5

2.2 SYMBOLS......................................................................... 7

SECTION 3: GETTING STARTED............................................8

3.1UNPACKING AN INSPECTING.................................................8

3.2ACCESSORIES....................................................................9

SECTION 4: CONTROLS AND INDICATORS.......................10

4.1 APPEARANCE.................................................................. 10

4.2 INDICATOR...................................................................... 11

4.3 KNOB.............................................................................11

4.4 SOCKET......................................................................... 11

2

4.5 BATTERY........................................................................ 11

SECTION 5: OPERATION PROCEDURE..............................12

5.1 PREPARATION.................................................................12

5.2 DETECTING.....................................................................14

5.3 RECORDING....................................................................16

SECTION 6 PREVENTIVE MAINTENANCE...........................16

6.1 MAINTENANCE................................................................. 16

6.2 VISUAL INSPECTION.........................................................18

6.3 CLEANING PRODUCT AND ACCESSORIES.............................19

6.4 DISINFECTIONS................................................................21

6.5 RECYCLE BATTERIES.......................................................21

6.6 AUTHORIZED REPAIR SERVICE..........................................21

SECTION 7: TECHNICAL SPECIFICATIONS........................21

APPENDIX A EMC INFORMATION........................................25

S ec tion 1: Instruction

Become familiar with the controls and how to use the PRODUCT
properly before operating the product.

CAUTION: Federal law restricts this device to be sold by or on
the order of a physician or practitioner licensed by state law in
which he/she practices to use or order the use of the device.

CAUTION: It should not be used in life supporting or life
sustaining applications

1.1 Contact Information

Manufacturer: Shenzhen Jumper Medical Equipment Co., Limited;
Manufacturer Address: 5th Floor Building No. 34, Baoyuan Industrial
Zone, Xixiang Street, Baoan District, Shenzhen 518102 ,P.R. China
Telephone Number: [phone]
F a x: [phone]
Web site: http://www.jumper-medical.com

Manufacturing:

Shenzhen Jumper Medical Equipment Co., Limited;
5th Floor Building No. 34, Baoyuan Industrial Zone,
Xixiang Street, Baoan District, Shenzhen 518102 ,P.R.
China

Authorized European Representative:

Wellkang Ltd
Suite B, 29Harley Street ,
LONDON,W1G9QR,u.k.

1

US Agent:

Tingting Yan
CHINESE LEGAL CONSULTANT, LLC.
2836 rainview dr. san jose, CA 95133
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Order Entry:

To order additional Ultrasonic Instrument or accessories:

Worldwide
Web site: http://www.jumper-medical.com

Customer Service:

To receive customer support:
U.S. and Canada Outside U.S. and Canada
408-729-3833 + 86 755 26696279
408-729-3844 (Fax) + 86 755 26852025 (Fax)
Email: [e-mail] Email: [e-mail]

1.2 Indication for Use

The AngelSounds Fetal Doppler JPD-100S (mini) is a prescription from
licensed physician in hospitals, clinics and private offices. It is intended
to be used by care professionals including practical nurses, midwives,
relative technicians, and physician assistants.
This device can detect the Fetal Heart Rate. Connect the headset allows
for hearing the sound of the fetal heartbeat. You can count the fetal
heartbeat rate when listening. This device normally is applied to 12
weeks gestation or later, difference in pregnant mater.

2

The device detects fetal life from early gestation thru delivery, and it can
be a general indication of fetal well being. It can also be used to verify
fetal heart viability following patient trauma.

1.3 Product Description

The product is a lightweight, portable detector. It is designed to meet
your detecting and hearing needs by providing advanced detecting
functions and a full range of sound of the fetal heartbeat.

The product is mainly used to detect the fetal heartbeat rate (FHR) and
the sound of the fetal heartbeat (SFH).

The growth and development of a fetus can be found out through
examination of these indices. It is applicable for department of
gynaecology and obstetrics and clinic daily.

In accordance with classification criteria in Annex IX on “Medical Device
Directive 93/42/EEC”, the product is class IIa based on rule 10, “Devices
for Direct Diagnosis or Detection on physiological process”.

The Product is powered by a 9V internal battery.

1.4 Operating Principle

Fetal Doppler consists of transmitter unit, receiver unit, signal process
unit, and signal output unit (such as speaker, headset, display screen
etc).

Ultrasonic wave is transmitted from one piezoelectric ceramic at the
front of the probe to the uterus of the pregnant women. Echo is received
by the other piezoelectric ceramic at the front of the probe when

3

ultrasonic wave reaches the fatal heart. Then it is converted into voltage.
This Doppler signal is detected and demodulated from the received
signal. And the Doppler frequency is consistent with the rhythm of the
fetal systole and diastole. Once cardiac valves vibrate and a Doppler
frequency excursion is formed. It is transmitted an output signal of
cardiac valves vibrating, and it is sent to signal demodulate unit to get
the Doppler frequency signal, and process the signal become the signal
that can be heard by human using headset.

1.5 Contraindications for Use

Normally none, as a particular case, please consult your doctor.

1.6 Adverse effects

No adverse effect.

4

Section 2: Safety Guidance

This product is internal powered equipment, and the degree of shock
protection is BF.

It means that these person connections will comply with permitted
leakage currents, dielectric strengths of IEC/EN60601.

2.1 Safety alert descriptions

The following is a list of product safety alerts that appear in this section
and throughout this manual. You must read, understand, and heed
these safety alerts before attempting to operate the Product.

DANGER: Fire and Explosion Hazard

Do not operate the product in the presence of flammable
gases to avoid possible explosion or fire hazard.

WARNING: Use only Approved Equipments
Do not use batteries, gel, cables, or optional equipment other
than those approved by Jumper Medical Ultrasonic
Instrument Co., Ltd. which may cause the Product to function
improperly during a rescue.

WARNING: Adjacent and/or Stacked Equipment
The product should not be used adjacent to or stacked with
other equipment. If adjacent or stacked use is necessary,
the product should be observed to verify normal operation in
the configuration in which it will be used.

WARNING: Practice the ALARA principle

5

We recommend that exposure to ultrasound should be kept
as low as reasonably achievable principle. This is considered
to be good practice and should be observed at all time.

WARNING: Aid healthcare professional tool
The product should not be used in place of normal fetal
monitoring. It is a tool to aid the healthcare professional.

CAUTION: Temperature/Humidity/Pressure Extremes

Exposing the Product to extreme environmental conditions
outside of its operating parameters may compromise the
ability of the Product to function properly.

CAUTION: Battery Disposal

Recycle or dispose of the battery in accordance with all
federal, state and local laws. To avoid fire and explosion
hazard, do not burn or incinerate the battery.

CAUTION: Possible Radio Frequency (RF) Susceptibility
RF susceptibility from cellular phones, CB radios and FM 2­way radio may cause interference with the Product. Do not
operate wireless radiotelephones in the vicinity of the
Product – turn power OFF to the radiotelephone and other
like equipment near the Product.

CAUTION: Systems Statement
Equipment connected to the Product must be certified to the
respective IEC Standards (i.e. IEC 950 for data processing
equipment and IEC 601-1 for medical equipment).
Furthermore, all configurations shall comply with the system
standard IEC 601-1-1. Anybody who connects additional
equipment to the signal input part or signal output part
configures a medical system, and is therefore, responsible
that the system complies with the requirements of the system

6

standard IEC 601-1-1. The Product Service Port is only
intended for use during maintenance by authorized service
personnel.

CAUTION: Case Cleaning Solutions
When disinfecting the case, use a non-oxidizing disinfectant,
such as ammonium salts or a glutaraldehyde based cleaning
solution, to avoid damage to the metal connectors.

CAUTION: Environment of use
The Product is designed for indoor use. Operator must
confirm that the environment of use meets the required
operating environmental specifications before using.

CAUTION: Cold Environments
If the Product is stored in an environment with a temperature
below the operating temperature, the unit should be allowed
to warm up to the needed operating temperature before
using.

CAUTION: Product recycling or disposal
The product could be sent back to the manufacturer for
recycling or proper disposal after their useful lives.

2.2 Symbols

The following symbols may appear in this manual, on the Product, or on
its accessories. Some of the symbols represent standards and
compliances associated with the Product and its use.

Consult instructions for use of the Product
and/or its accessories.

Warning Information

7

Authorized Representative in the European
Community

CE Mark: The Product system conforms to
essential requirements of the Medical Device
Directive 93/42/EEC.

Date of manufacture.

Manufacturer

Specifies serial number of the Product

LOT Number

It indicates that the equipment should be sent to the
special agencies according to local regulation for
separate collection after its useful life.

Section 3 : Getting Started

This section presents information on unpacking the Product.
This section contains a list of parts for product. To place an order,
contact your representative or distributor.

3.1Unpacking an Inspecting

Every attempt is made to ensure your order is accurate and complete.
However, to be sure that your order is correct, verify the contents of the
box against your packing slip.

0482

8

The product is designed for simplicity of operation and set-up and
requires minimal assembly. The following item is packing list:

No. Item Quantity Packed or

Unpacked

1 Packing List 1 √

2 Instruction Manual 1 √

3 Main Unit 1 √

4 Line-in Cable 1 √

5 Headset 1 √

Carefully inspect each item as it is unpacked for any signs of damage
which may have occurred during shipment.

 Check the components according to the packing list.

 Check for any damage or defects. Do not attempt to setup the

Product if anything is damaged or defective. Contact Jumper
Medical Equipment Co., Limited Ultrasonic Instrument Customer
Service immediately if anything is damaged or defective.

3.2Accessories

ACCESSORIES

Part Number Description

none

9

Section 4: Controls and indicators

This section provides the basic set up information. You need to read this
section in detail before operating the device.

4.1 Appearance

10

4.2 Indicator

There is an indicating light on JPD-100S(mini).

Function: Power on indicate.

4.3 Knob

There is a knob on JPD-100S(mini).
Power on/off and volume knob

Function: Power on or off the device, change the volume of the
speaker.

4.4 Socket

There are one headset socket and one USB interface used as audio out
socket at the device.

The headset socket can be connected with headset.
The USB interface is used to connect Line-in Cable (NOTE: please refer
to accessories).

4.5 Battery

This device is internal powered. The power of JPD-100S (mini) comes
from a 9V alkaline battery (IEC type No. 6F22 or equivalent).

11

Section 5: Operation procedure

This section provides the description for operation.

5.1 Preparation

Follow these recommendations to preparation for operation:

5.1.1 Install Battery
Open the battery cover, and install the 9V battery. Then, cover the

battery cover.

NOTE ： You should push the battery cover backward like the figure
upward.
Then you can open the battery cover.

Battery type: Alkaline battery 9V

CAUTION:
Remove the battery if the device is not likely to be used for
some time. And keep the battery in cool and dry
environment.

12

WARNING: Irregular treatment of batteries may be result in
hazards to health and environment.

5.1.2 Connect headset
Before you practice the product, you should prepare an
earphone or a headset to hear the fetal heartbeat sound.
We will give you a headset as a present. It can help you to
hear the fetal heartbeat sound when you have not bought an
earphone.
Insert the headset-plug into headset socket, and wire the
handset.

5.1.3 Power on by turning the Power on/off and volume knob

5.1.4 Remove clothes from the pregnant maternal abdomen.

5.1.5 Applying couple gel to the faceplate ( ) of
probe or abdomen of pregnant woman.

13

5.2 Detecting

5.2.1 Find the fetal heart and listen the fetal heartbeat sound

Locate the position of the fetus by hand touching, firstly to find out the
best direction to the fetal heart. The position of the fetal heart in
abdomen of pregnant woman you can contrast the figure below. Place
the faceplate of probe at the best position for detecting fetal heartbeat.
Adjust the transducer to obtain an optimum audio signal ideally by
angling the transducer around. Generally, the site of heart of fetus is 1/3
below of navel line at its earlier stage, it then moves upward with
increasing of gestational period, and the site of heart of fetus will be a
little deviation to left or right with different fetus. Pls. make sure that the
surface of the probe should be contacted fully with the skin. After the
sound become clear, it is the proper functioning. If no coupling gel,
water can be used.

14

Gestation

Antepartum

Parturition

15

5.2.2 Calculate the fetal heartbeat rate

Count the fetal heartbeat sound in one minute, the number you counted
is the fetal heartbeat rate. Repeat count at least 3 times, you will get the
range of fetal heartbeat rate.

5.3 Recording

When you hear the fetal heartbeat sound, you can connect one socket
with a headset, and another can connect with computer. You can replay
the recorded sound files anytime, and you can send them whoever you
want.

S ection 6 Preventive maintenance

Proper maintenance of the product is very simple, yet it is an important
factor of its reliability. The section describes the maintenance and
service required for the product and its accessories.

6.1 Maintenance

WARNING: Failure on the part of all responsible individuals,

hospitals or institutions, employing the use of Product, to
implement the recommended maintenance schedule may cause
equipment failure and possible health hazards. The
manufacturer does not, in any manner, assume the

16

responsibility for performing the recommended maintenance
schedule. The sole responsibility rests with the individuals,
hospitals, or institutions utilizing the product.

1. The transducer acoustic surface is frangible and must be handle

with care .Gel must be wiped off from the transducer after use.
These precautions will prolong the life of the unit.
The user must check that the equipment does not have visible
evidence of damage that may affect patient safety or product’s
capability before use .The recommended inspection interval is
once per month or less. If damage is evident, replacement is
recommended before use.

2. To ensure the product is always functional when required, the

following maintenance shall be performed:

 Visual Inspection
 Cleaning the product and its accessories
 Check the battery fuel gauge
 Testing product Performance

Correction: manually calculate the FHR with hearing fetal heartbeat
sound for qualification.
Recommended maintenance and care:

 It is important that the Product is stored at the operating

temperature range if it is expected to be used. Optimal battery life
will be obtained if stored and operated at room temperature. See
Section 7 for Temperature Specifications.

 The Product requires no calibration.

17

6.2 Visual Inspection

The product and its accessories should be carefully inspected prior to
installation, once every 12 months thereafter and each time the
equipment is serviced.

 Carefully inspect the equipment for physical damage
 Inspect all external connections for loose connectors or frayed

cables.

 Verify that the Safety label on back of the product is clearly legible

INSTRUCTION INSPECT FOR RECOMMENDED

REMEDY
Examine the case
connectors and
accessories

Foreign substances Clean the Product and

its accessories as

described.

Damage or cracks Contact Our Customer

Service

Examine
accessory cables

Foreign substances Clean the cables as

described in the

Section 5

Broken parts, cracks,
damage, or extreme
wear, broken or bent
connectors and pins,
after bending and
flexing the cable

Replace cable if any

abnormalities are

found.

Examine
disposable
accessories

Expired PRODUCT
or Product PADS

Replace any products

approaching or past

their expiration dates.

18

WARNING: After the visual inspection, if the Product and/or its
accessories are damaged please contact our Customer Service.
The Product will need to be returned back to us for repair. The
accessories should be disposed of appropriately and
replacement parts shall be ordered.

6.3 Cleaning Product and Accessories

Listed below are recommendations for cleaning the Product and its
accessories.

Recommended cleaning product:
The following cleaning products may be used to clean the exterior
surfaces of the Product as well as the batteries.

 Do not use abrasive cleaners or strong solvents such as acetone

or acetone-based cleaners.

 Do not mix disinfecting solutions (such as bleach and ammonia) as

hazardous gases may result.

 Do not clean electrical contacts or connectors with bleach.

Cleaning instructions:

1. Before cleaning the Product, turn off the device and disconnect the
power cord.

2. Before cleaning, remove all adherent soil (tissue, fluids, etc.) and
wipe thoroughly with a cloth dampened with water before applying
the cleaning solution.

3. When cleaning, do not immerse. Keep the exterior surface of the
device clean and free of dust and dirt, clean exterior surface of the

19

unit with a dry, soft cloth .if necessary, clean it with a soft cloth
soaked in a solution of soap and wipe dry with a clean cloth
immediately. Wipe the transducer body with soft cloth to remove
any remaining coupling gel .Clean with soap only

4. Wring any excess moisture from the cloth before cleaning.

5. Avoid pouring fluids on the device, and do not allow fluids to
penetrate the exterior surfaces of the device.

6. To prevent scratching the display, the use of a soft cloth is
recommended.

CAUTION: To prevent damage to equipment, do not clean any
part of the Product or Accessories with phenolic compounds. Do
not use abrasive or flammable cleaning agents. Do not steam,
autoclave, or gas-sterilize the Product or accessories.

CAUTION: Cleaning liquids: DO NOT submerge the device in
liquids or pour cleaning liquids over, into or onto the device.

.

* Don’t use strong solvent, for example, acetone.
* Never use an abrasive such as steel wool or metal polish.
* Do not allow any liquid to enter the product, and do not immerse any
parts of the device into and liquids.
* Avoid pouring liquids on the device while cleaning.
* Don’t remain any cleaning solution on the surface of the device.
Wipe the surface of sensor of transducer with 70% ethanol or alcohol,
self-air dry or clean with a clean, dry cloth.

20

6.4 Disinfections

Cleaning the unit surface and the transducer as the above mentioned,
then wipe the surface of transducer with 70% ethanol or alcohol, clean
the transducer surface with a dry, soft cloth.
* Don’t use low temperature steam sterilization or other way to sterilize
* Don’t use high temperature sterilizing process

6.5 Recycle Batteries

The battery is recyclable. Remove the old battery from the Product and
follow your local recycling guidelines or Refer to local regulations.

WARNING: Irregular treatment of batteries may be result in
hazards to health and environment.

6.6 Authorized Repair Service

The Product has no user-serviceable internal components. Try to
resolve any maintenance issues with the Product by using the
Troubleshooting Table presented in this chapter. If you are unable to
resolve the problem, contact Jumper Medical Equipment Co., Limited
Service.

NOTE: The warranty will be void upon unauthorized disassembly or
service of the product.

Section 7 : Technical specifications

This section presents the specifications and safety standards of the
product.

NOTE: The following specifications are subject to change and are only
noted as a point of reference.

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Product name: Fetal Doppler

Mode: JPD-100S(mini)
Safety: Complies with IEC 60601-1: 1990 + A1:1993 + A2:1995, EN

60601-1: 1990 + A1:1993 + A2:1995 + A13:1996 , EN60601-1-2:2001,
IEC 61266:1994

Classification:

Anti-electric shock type: Internal powered equipment
Anti-electric shock degree: Type BF equipment
Classification of protection against harmful ingress of water:

Ordinary protection IPX0
Methods of sterilization or disinfection: No disinfection required the

equipment
Degree of Safety in Presence of Flammable Gases: Equipment not

suitable for use in the presence of flammable gases
Mode of operation: Continuous operation
EMC: Group I Class B

Technical parameters:

Ultrasound:
Ultrasonic emitting frequency: 3MHz
Ultrasonic emitting power: <10mW/cm

2

Overall sensitivity at the distances 200mm from the face of the probe

(Doppler frequency: 500±50Hz, Target velocity: 10cm/s~40cm/s):

≥90dB
Spatial-peak temporal-peak acoustic pressure: ≤1MPa
Output power: <20mW
Effective area of the ultrasonic transducer active element:

2.65cm2±0.3cm

2

22

The acoustic coupling medium for normal use: ph: 5.5~8, Acoustic
impedance: ≤1.7*105g /cm2·s

Working mode: Continuous wave Doppler
Audio output:
Audio output power: <0.5 W
Audio out Socket: Φ3.5mm/USB interface

Recommended battery type:

9V DC alkaline battery (IEC Type No. 6F22 or equivalent)

Stand-by Time: >4hours

Suitable gestation: 12 gestational weeks or later, difference in

pregnant mater.

Physical Characteristic:

Size: 104.5(length) * 50(width) * 70(height) mm
Weight: 69.5g (only main unit, not including battery)

Environmental Requirements:

Operating Conditions:
Temperature: 5C to 40C
Humidity: 0 to 80% RH, non-condensing
Atmospheric pressure: 860hPa to 1060hPa
Storage and Shipping Conditions:
Temperature: -10C to 60C
Humidity: 0 to 95% RH, non-condensing
Atmospheric pressure: 500hPa to 1060hPa

23

CAUTION: Environment of use

Product is designed for indoor use. Operator must confirm that
the environment of use meets the required operating
environmental specifications before using.

CAUTION: Cold Environments
If the Product is stored in an environment with a temperature
below the operating temperature, the unit should be allowed to
warm up to the needed operating temperature before using.

CAUTION:
Fetal Doppler needs special precautions regarding EMC and

needs to be installed and put into service according to the EMC
information provided for in the ACCOMPANYING
DOCUMENTS.

CAUTION:

Portable and mobile RF communications equipment can affect

Fetal Doppler.

CAUTION:

The Fetal Doppler should not be used adjacent to or stacked
with other equipment.

NOTE: The device is not user serviceable, and service must be down by
authorized persons. Or contact customer service of Jumper Medical
Equipment Co., Limited

24

Appendix A EMC Information

A1.1 Electromagnetic Emissions

The Fetal Doppler is intended for use in the electromagnetic
environment specified below. The customer or the user of the
Fetal heart monitor should assure that it is used in such an
environment.

Emissions test Compliance

RF
emissions
CISPR 11

Group 1 The Fetal Doppler 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 Fetal Doppler is suitable for

use in all establishments, including

domestic establishments and those

directly connected to the public

low-voltage power supply network

that supplies buildings used for

domestic purposes.

A 1.2 Electromagnetic Immunity

The Fetal Doppler is intended for use in the electromagnetic
environment specified below. The customer or the user of the Fetal
Doppler should assure that it is used in such an environment.
Immunity test IEC

60601
test
level

Compliance
level

Electromagnetic
environment
guidance

25

Electrostatic
discharge
(ESD)
IEC 61000-4­2

±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
%.

A 1.3 Electromagnetic Immunity (not life-supporting)

Doppler is intended for use in the electromagnetic environment specified

Immu
nity
test

IEC
60601
test
level

Com
plian
ce
level

Electromagnetic environment –
guidance

Radiat
ed RF
IEC
61000

-4-3

3 V/m
80 MHz
to 2,5
GHz

3
V/m

Portable and mobile RF
communications equipment should
be used no closer to any part of
the Fetal Doppler including
cables, than the recommended
separation distance calculated
from the equation applicable to the
frequency of the transmitter.
Recommended separation
distance

26

a. 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 metres (m). Field
strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey,
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 Fetal
Doppler is used exceeds the applicable RF compliance level
above, the Fetal Doppler should be observed to verify normal
operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating

27

the Fetal Doppler.
b Over the frequency range 150 kHz to 80 MHz, field strengths
should be less than 3 V/m.

A 1.4 Recommended Separation Distances

Recommended separation distances between
portable and mobile RF communications equipment and the

Fetal Doppler.

The Fetal Doppler is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled.
The customer or the user of the Fetal Doppler can help prevent
electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment
(transmitters) and the Fetal Doppler 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

28

For transmitters rated at a maximum output power not listed
above, the recommended separation distance d in metres (m)
can be estimated 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.

29

30

Manufacture: Shenzhen Jumper Medical Equipment Co.
Ltd.

Address: 5th Floor Building No. 34, Baoyuan Industrial
Zone, Xixiang Street,Baoan District, Shenzhen 518102,P.R.
China
Tel: [phone] Fax: [phone]
Website: www.jumper-medical.com
E-mail: [e-mail]

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