Ultrasound Technologies PD1, Fetatrack 120 Doppler Service manual
Ultrasound Technologies Ltd
PD1 & Fetatrack 120 series Dopplers
Service manual
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425 F: +44 (0) 1291 427093
E: ultratec@doppler.co.uk W: www.doppler.co.uk
PD1 & FT120 service manual Issue 3 Jan 2007
V
Product Group
Ultrasound Technologies Ltd
Products covered by this service manual
PD1 series
pocket dopplers
Product version
PD1 audio pocket
doppler
PD1+ fetal doppler
with FHR display
Product variation
Babypulse home use
doppler
Fetatrack 120 audio
doppler
PD1dwr waterbirth
doppler
Fetatrack 120+ fetal
doppler with FHR
PD1v vascular
doppler
PD1cv low cost
vascular doppler
PD1v flat probe
vascular doppler
ascutrack 120
vascular doppler
PD1combi fetal /
vascular doppler
PD1 service manual Issue 2 January 2005
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425 F: +44 (0) 1291 427093
E: ultratec@doppler.co.uk W: www.doppler.co.uk
1. 0General Introduction
1.1.
Introduction
14
Re Order Information
1.2.
15
Symbols
1.3.
16
CE Marking
1.4.
17
Guidelines for identifying and resolving adverse EMC conditions
1.5.
18
Specification
1.6.
19
2.
Description of the Instrument
1
2.1.
Audio Unit.
20
Audio Unit
2.2.
21
Audio Unit
2.3.
22
Dismantling Instructions
2.4.
23
Audio Unit
2.5.
24
Transducers
2.6.
25
3.
Circuit Description
2
3.1.
Introduction
26
Audio Unit Power Supply
3.2.
27
Battery Low Indicator
3.3.
28
Ultrasound Transducer
3.4.
29
Oscillator and Detector
3.5.
30
Receiver and Detector
3.6.
31
Audio Amplifier
3.7.
32
Velocity Processor
3.8.
33
4.
Test and Calibration
3
4.1.
Introduction
34
Performance Checks
4.2.
35
Test Procedure
4.3.
36
Audio Unit
4.4.
37
Transducer
4.5.
38
Velocity Processor
4.6.
39
Transducer Calibration
4.7.
40
5.
Fault Finding
4
5.1.
Fault Finding Guidelines
41
6.
Parts Lists
5
6.1.
Audio Unit PCB Assembly
42
Audio Unit with heart rate PCB Assembly
6.2.
43
2MHz Transducer assembly
6.3.
44
General Assembly
6.4.
45
+ units General Assembly
6.5.
46
7.
Drawings and Circuit Diagrams
6
Ultrasound Technologies Ltd
CONTENTS
PD1 service manual Issue 2 January 2005
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425 F: +44 (0) 1291 427093
E: ultratec@doppler.co.uk W: www.doppler.co.uk
Ultrasound Technologies Ltd
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
Caldicot, NP26 5PS
48
South Wales , UK
Telephone: +44 (0) 1291 425425
FAX: +44 (0) 1291 427093
E-mail: service@doppler.co.uk
49
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 Technologies Ltd Page 1 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies Ltd
1.1 50Re - Order Information
Listed below are the consumables used with the PD1 Series Pocket Dopplers: -
Description
Ultrasound Coupling Gel 0.25ltr.
MN1604 series Alkaline Battery
51
1.2
Symbols
52
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
Attention Consult accompanying documents
86
Serial DATA Out
Headset Output
Volume Control
Rear View of doppler
Showing additional symbols
©Ultrasound Technologies Ltd Page 2 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies 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
Guidelines for identifying and resolving adverse EMC conditions
54
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 service manual Issue 2 January 2005
Ultrasound Technologies 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/cm² SATA (2, 3 MHz fetal probe)
<15mW/cm² SATA (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+)
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
3 digit FHR LCD display / FHR pulse
©Ultrasound Technologies Ltd Page 4 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies 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 service manual Issue 2 January 2005
ansduce
Ultrasound Technologies 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
r
Fetatrack 120 + fetal
transducer
©Ultrasound Technologies Ltd Page 6 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies Ltd
2.3.
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.
Audio Unit PD1v
57
©Ultrasound Technologies Ltd Page 7 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies Ltd
2.4. 58Dismantling Instructions
Special Note: -The instrument must not be dismantled when in use on a patient, ensure all accessories
are disconnected.
2.5. 59Audio Unit
The Audio unit houses the main circuit board. To remove the circuit board, turn the unit onto it's front and
remove the three M4 countersunk screws. The rear panel will now come away revealing the PCB.
Remove the two M3 screws securing the PCB.
©Ultrasound Technologies Ltd Page 8 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies Ltd
The transducers, loudspeaker and battery connections are ‘hard wired’ to the PCB. De-solder the
connections at J4 (retractile cable) and J3 (loudspeaker), the PCB can then be pulled clear of the case.
©Ultrasound Technologies Ltd Page 9 of 32
PD1 service manual Issue 2 January 2005
Ultrasound Technologies Ltd
2.6 Transducers
60
The transducers are a ‘sealed unit’. However, it is possible to gain access to the 2 MHz assembly by
removing the two blanking grommets and M3 countersink screws. Removing the screws will allow the
assembly to be split along its length. Gently prise the assembly apart.
The circuit board is bonded and keyed to the faceplate assembly using a high strength cyno-acrylic
adhesive.
Circuit board removal is carried out by carefully breaking the bond and de-soldering the crystal wires and
retractile cable connections (see diagram below).
©Ultrasound Technologies Ltd Page 10 of 32
PD1 service manual Issue 2 January 2005
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