Ultrasound Technologies PD1 series User manual

Ultrasound Technolo
g
ies Ltd
PD1 & Fetatrack 120 series Dopplers
Service manual
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone] E: [email protected] W: www.doppler.co.uk

Ultrasound Technolo
g
ies Ltd
Products covered by this service manual
PD1 series
pocket dopplers
Product Group
Product version
Product variation
PD1 audio pocket
doppler
Babypulse home use
doppler
Fetatrack 120 audio
doppler
PD1+ fetal doppler
with FHR display
PD1v vascular
doppler
Fetatrack 120+ fetal
doppler with FHR
PD1dwr waterbirth
doppler
PD1cv low cost
vascular doppler
PD1v flat probe
vascular doppler
PD1combi fetal /
vascular doppler
V
ascutrack 120
vascular doppler
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone] E: [email protected] W: www.doppler.co.uk

Ultrasound Technolo
g
ies Ltd
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone] E: [email protected] W: www.doppler.co.uk
Products covered by this service manual
The following products are manufactured by
Ultrasound Technologies ltd,
Lodge Way,
Portskewett,
NP26 5PS,
United Kingdom
Tel:- [phone]
Fax: [phone]
Email: [email protected]
Ultratec PD1 series fetal and vascular dopplers
Rotburg PD1 / PD1+ series fetal dopplers
Sibel PD1/ PD1+ series fetal dopplers
Gima G2000 series fetal dopllers
Gima V2000 seies vascular dopplers
Fetatrack series fetal dopplers
Vascutrack series fetal dopplers

Ultrasound Technolo
g
ies Ltd
CONTENTS
1.
0General Introduction
1.1. 14Introduction
1.2. 15ReOrderInformation
1.3. 16Symbols
1.4. 17CE Marking
1.5. 18Guidelines for identifying and resolving adverse EMC conditions
1.6. 19Specification
2. 1Description of the Instrument
2.1. 20Audio Unit.
2.2. 21Audio Unit
2.3. 22AudioUnit
2.4. 23Dismantling Instructions
2.5. 24AudioUnit
2.6. 25Transducers
3.
2Circuit Description
3.1. 26Introduction
3.2. 27Audio Unit Power Supply
3.3. 28Battery Low Indicator
3.4. 29Ultrasound Transducer
3.5. 30Oscillator and Detector
3.6. 31ReceiverandDetector
3.7. 32AudioAmplifier
3.8. 33VelocityProcessor
4. 3Test and Calibration
4.1. 34Introduction
4.2. 35Performance Checks
4.3. 36TestProcedure
4.4. 37AudioUnit
4.5. 38Transducer
4.6. 39VelocityProcessor
4.7. 40TransducerCalibration
5. 4Fault Finding
5.1. 41Fault Finding Guidelines
6. 5Parts Lists
6.1. 42Audio Unit PCB Assembly
6.2. 43Audio Unit with heart rate PCB Assembly
6.3. 442MHz Transducer assembly
6.4. 45General Assembly
6.5. 46+ units General Assembly
7. 6Drawings and Circuit Diagrams
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone] E: [email protected] W: www.doppler.co.uk

Ultrasound Technolo
g
ies Ltd
©Ultrasound Technologies Ltd Page 1 of 32
PD1 / FT120 service manual Issue 3 January 2007
1. 7General Introduction
1.1. 47Introduction
This service manual is written to support the maintenance and repair of the PD1 Series Doppler detectors.
Servicing of this equipment should be performed by a qualified technician, after carefully studying this manual.
The drawings and circuit descriptions in this manual are correct as of the date it was prepared, however, however the Company
reserves the right to make changes to improve the operation of the instrument. If your instrument does not exactly match the
information in this manual, contact the manufacturer or distributor for revision information.
Inspect the instrument upon receipt, in the unlikely event that the unit has been damaged, notify your distributor or Ultrasound
Technologies directly at the following address: -
Ultrasound Technologies Ltd.,
Lodge Way, Portskewett
48 Caldicot, NP26 5PS
South Wales , UK
Telephone: [phone]
FAX: [phone]
49 E-mail: [email protected]
Retain the packing material for possible future use.
Important Note:
In the unlikely event that the instrument must be returned to Ultrasound Technologies for service or for any other reason, use
the same packing material in which the instrument was delivered.
If this is not available, the instrument should be packed in such a way that will provide adequate packing. The Company will not
accept any responsibility for loss or damage due to improper use of packing material.

Ultrasound Technolo
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ies Ltd
1.1 50Re - Order Information
Listed below are the consumables used with the PD1 Series Pocket Dopplers: -
Description
Ultrasound Coupling Gel 0.25ltr.
51 MN1604 series Alkaline Battery
1.2 52Symbols
The following symbols have been used on the PD1 and are here defined according to IEC60601
IEC Symbol 878-02-02
Type B Equipment.
IEC Symbol 348
86Attention Consult accompanying documents
Headset Output
Volume Control
Serial DATA Out
Rear View of doppler
Showing additional symbols
©Ultrasound Technologies Ltd Page 2 of 32
PD1 / FT120 service manual Issue 3 January 2007

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ies Ltd
1.3 53CE Mark
This product complies with the essential requirements of the European Council Directive 93/42/EEC relating to Medical
Devices.
0120
1.4 54Guidelines for identifying and resolving adverse EMC conditions
This product is classified as a Class A Group 1 type of product according to EN55011.
Emissions
Care has been taken through the design and manufacturing process to minimise the EM emissions, which may be
produced by this equipment. However, in the unlikely event that the unit causes an EM disturbance to adjacent
equipment, we suggest that the procedure is carried out ‘out of range’ of the affected equipment.
Immunity
If the user has any doubt regarding the units EM immunity during routine operation, we suggest that the source of EM
disturbance is identified and it’s emissions reduced. If there is any doubt regarding the identification and resolution of
adverse EM conditions, contact Ultrasound Technologies Ltd directly who will advise on the situation. The address
can be found in the front of this manual.
©Ultrasound Technologies Ltd Page 3 of 32
PD1 / FT120 service manual Issue 3 January 2007

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ies Ltd
1.5 Series specifications
Ultrasound
Frequency (PD1+ / PD1dwr / fetatrack 120+) 2 MHz continuous wave fixed probe
(PD1v / PD1cv / Vascutrack 120) 5 or 8 MHz continuous wave fixed probe
(PD1 combi /PD1+ combi / Combitrack) 2, 3, 5 or 8MHz interchangeable probe
Transducer 2 crystal narrow beam.
Output power <5mW/cm²SATA (2, 3 MHz fetal probe)
<15mW/cm²SATA (5 and 8MHz vascular probe)
Audio response 300Hz – 1KHz (fetal)
300Hz – 4KHz (vascular)
Audio output 500mW
Fetal heart rate (PD1+ / PD1+ combi / PD1dwr / fetatrack 120+) Multipoint real time autocorrelator
Fetal Heart Range 50 to 210 bpm
Unit Controls
Keys 1 Key (for unit on/off on audio unit – all models)
1 Key (for unit on/off on probe – fetatrack 120 and vascutrack 120 models)
Controls Rotary volume
Indicators (PD1 / PD1/ combi / PD1v / fetatrack 120 / vascutrack 120) Yellow battery low LED
Indicators (PD1+ / PD1+ combi / PD1dwr / fetatrack 120+)3 digit FHR LCD display / FHR pulse
icon / Battery Low icon
Power Supply
Battery MN1604 (PP3) 9V Alkaline Manganese
Expected battery life (PD1 / PD1v / fetatrack 120 / vascutrack 120) >9 hours
Expected battery life (PD1+ / PD1dwr / fetatrack 120+) >8 hours
Outputs
Headset Audio output to optional headset
Serial (PD1+ / PD1dwr / fetatrack 120+) RS232 interface to optional UltraTrace software
Recorder (PD1v [not PD1v CAT] / vascutrack 120) Voltage output proportional to velocity of
flow
Enclosure
Material ABS
Size 150mm by 75mm
Weight 295g typically including transducer
Safety
Classification Class 1 Type B - IEC 60601-1
©Ultrasound Technologies Ltd Page 4 of 32
PD1 / FT120 service manual Issue 3 January 2007

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ies Ltd
2. 8Description of the Instrument
2.1. 55Audio Unit PD1 (Fetatrack 120, Babypulse)
The following functions are found in the relevant page of the operating instructions.
UNIT ON/OFF On / Off control.
BATTERY LOW LED indicator to show when the battery has reached a point when it requires changing.
VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the setting of the volume.
HEADSET Audio output for connection to a stereo headset for private listening.
PD1 / Babypulse
fetal transducer Fetatrack 120 fetal transducer
©Ultrasound Technologies Ltd Page 5 of 32
PD1 / FT120 service manual Issue 3 January 2007

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ies Ltd
2.2. 56Audio Unit PD1+ (PD1dwr / fetatrack 120+ / babypulse +)
The following functions are found in the relevant page of the operating instructions.
UNIT ON/OFF On / Off control.
VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the setting of the volume.
HEADSET Audio output for connection to a stereo headset for private listening.
RS 232 Interface Serial data output, for connection to the optional ULTRATRACE 2 PC software. Connections are
made via the 3.5mm Stereo jack socket.
FHR DISPLAY Custom LCD module displays FHR rate, FH pulse and Battery condition.
PD1+ / Babypulse+ /
PD1dwr fetal
tr
a
n
sduce
r Fetatrack 120 + fetal
transducer
©Ultrasound Technologies Ltd Page 6 of 32
PD1 / FT120 service manual Issue 3 January 2007