fetatrack DD250 desk doppler
Contents
1. T1 IEC Mains input fuse and On Off Switch Mains Transformer DC Voltage at 230VAC 15 5V z 11 6 J5 DC Voltage at 200VAC 13 4V D DC voltage 15 5V DC current 900mA DBLS203G Common mode rejection PE pc ACI 3 2 EOM a 2hc2 ACBS 77 p T 12 5 j C2 C5 um C6 g 100nF 2 200uF 2 200uF E 13 _4 2 Dc poak ED Ya AMET act AGAS N L1 x Ne P SE MIN D3 300000 panne SW1 L p4 ws lcs 2 N1 co Va Nuvotem 70052K RS223 9339 U1 o 10BQ040 Transformer Output 12VAC 15VA O LM317S Fast charge is 500mA Bs At 80 full charge 48mA Vertical Mounting Blades 0 25 3 o NE RS 534 834 Vin Vout q 9 7 1 J3 NY y TAB m aay 10BQ040 a Adj 100K T7 arse Wd EH Isen 10nA v sense 1 6V i 27 7X C U2 prd e bs LL 177 6K8 6K8 eff 1 8 10K S i2. 5 6 7 8 CN 2 t Q2 3 Q3 Di mE FDN352AP 7 BC848B p 09 a O LLI 2 Ot E 1 1 7 s 7 9 VSewardprobe b N 2 o0 C7 1361 o lt a C21 C2 Q 10BQ040 fa 100nF 100uF B11 100nF 100uF O 2K2 e Battery Input 4 H 12K e C18 C19 00nF 3 100uF R1 LL eo Unit On Off control 1M U2 1 BatteryCondition 02 s EX PAS 8 P SET C12 R10 BZX84C6V2 Ot o i elk aH3 Tour 4x7 a J2 2 ip QGp s SE E CD4013 m C3 100nF C6 TUOF probe switch p a 2 UnitShutDown 02 Q G XQ we enc CN s B E E 2 Transducer ke Power gt Connector T 1 2 AudioComplex 02 _ 2 D JA U2 3 probe switch O SET JO 5 POLK Qa C 4 D m ce 80 RESET a N C8 c9 100nF V 220UF 220uF C20 CD4013 a o 3 Olaa Oba V Sewardprobe gt 10nF 10uD 1 T00R 5 j id vi R Pa TRI U1 SK1 59 pay U3 lt ps T 100K o vie 8 os Vm ween f wi00nF S 100uF CAP 4 100nF B R7 Vice M C2 e L 10R y V 100nF a GND Le C17 volume Control 4 E J3 af C13 C16 E CAP lt o 100nF 10uF X SI76
3. 15 SO A e APP T 15 Bale Low WMC PNE a da hancerea dered siaemetidoectnantusionundies baioeneentconeltienions 16 UJirasound IManSQUCOr entenderlos ocio lose 16 Oscillator and Transmitter Amplifier sssocrsoaio oline 16 Receiver and Detectores ERAEN EEEE Eia ai 17 AAA ej NR RE 17 Digital Sighal Processing ERN 17 FERONT UNG O esia E E T E S 18 o ONAN ET A E A etd orn to ser AE AEE N NA E AOE 18 Et C RE A R ET 18 VE Ao E E n o EEEE O A E E E 19 EAE S i E NE E E EE E E 19 CCU O I e E E E E ee eee 19 PRS SS MON Drawings sessin E ES 19 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 About This Manual This booklet explains the operation and service of the FETATRACK DD250 Desk doppler Care has been taken during the design and manufacture of this product so that it satisfies all of the current safety standards set down by BS EN60601 1 2006 To achieve the best from this product read the following sections several times and if you have any problems in the operation of a particular part of the product then contact your dealer immediately or contact Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot NP26 5PS South Wales UK Tel 44 0 1291 425425 Fax 44 0 1291
4. lo Lp A o fO K S Nz N N zm ISSUE 1 fT rl J Jd DL Lo LLL LLLA DRAWN CHECK A N NO ALL RIGHTS RESERVED FINISH Enclosure To 0 00 0 2 3rd ANGLE THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION P 0 000 PROJECTION OFTHE DOCUMENT OR OF THE MEMS sm THEREON WAY BE Assembly NT E WITHOUT THE COPYRIGHT OWNERS PERMISSION ANGULAR DO NOT SCALE PRI MATERIAL STANDARD DRAWN CHECK APPROVED TITLE SCALE E TOLERANCES ULTRA EC Fetatrack DD250 1 2 o O etatrac E P Nancollis ULTRASOUND TECHNOLOGIES LTD DRAWING No J7 J8 LED PCB J10 Red J8 Black J9 Yellow DDZ50D121 101 A 000 T o TT C A D DRAWING Assembly Enclosure Top dwg Solder the Volume Control PDi PCB wires to the PDi PCB according to the table The wires should be mounted in Je PIN 1 RED from the back of the PCB to Je PIN 2 BLACK keep them clear of the LCD VR1 Vin YELLOW VR1 Vout WHITE VR1 GND VIOLET o o o o o o BORIS s migo e e aa Um E ds n ue wi uA eee asd Mec Fit Speaker into cose using 2 M3x6 PT Self aa Plug the Speaker Tapping screws mnyr 961 0080 00 with M3 cable onto A Bits Plain and Shakeproof washers and Shakeproof washers according to the tolle PDi PCB SK1 PIN 1 BLACK dim qe SK1l amp e Pins SK1 PIN 2 RED SK1 PIN 3 N C ig SK1 PIN 4 YELLOW SKe PIN 1 N C SK2 PIN 2 WHITE 2m SK
5. 100NF 100uF 100nF 2 100uF 680pF C20 C23 T oK m 5 20 pF Se 1 F 2 0876 UR UR AE ale R14 E ES 2 0841 27K EO L1 C3 165 930pF 3 6 1 00nF 100uF i 3c d co 1 V a co m Dio eo BZX84C6V2 3 B oe a ur ll ay E il nS T VR1 C14 C24 tI 5r R15 eOnF R17 100nF Z9 2 1K5 10R R11 E 2K2 Es 3 R20 4 E 180K O C e E Vrf Ol 1 O Transducer Connector R4 Id o C21 n L3 R9 220pF 470pF R18 100K SUE i j 0842 100K e 3 U1 i Il N sA 4 C1 Ut 5 1 Lco is S y 100nF n TLO72 100K ec MMBF4416 E TLO72 TO SP ae x B zs C15 G C26 6 Bs tls n R12 a A R19 i onF 100K y 100K S 100K Y id WA nem o D ES i rX E B RxSig T Il E 220pF La alu gu lle 0838 S 1180 1KO C22 i H3 R8 100nF R16 3 6 10R E m pa 4 LCi tuF tuF 15 05 98 18 01 99 18 05 00 12 05 Pocket Doppler Fetal Transducer 2MHz Ultrasound Technologies Ltd Lodge Way Drawn nas utl Drg No pp1p110 ASSY Copyright Portskewett Caldicot Date 18 05 2000 ultratec 2003 South Wales NP26 5PS UK Name FETALTDR R5 Sheet 1 1 2 3 4 5 6 7 8 A B C D E F G H
6. 2KV Electro Static 4KV 6KV Contact Discharge Discharge Repetition Rate 1second Effect was a FHR reading of 58 BPM Test applied 0 5KV 1KV 2KV AC power line to ground 0 5KV 1KV 6KV AC power line to line Effect was a FHR reading of 58 BPM FetatrackDD250 Service Manual Issuel Applied test signal is very high for high sensitivity electronics and non applied transducers With correctly applied transducers interference from in band RF signals is unlikely Normal operation is unaffected and the static reading can be cancelled by pressing the toco zero button Normal mains power is unlikely to cause such a transient burst Displayed rate is unlikely to occur when transducers are connected to a patient Unit should be used in a low static environment Displayed rate is unlikely to occur when transducers are connected to a patient Normal mains power is unlikely to cause such a surge Displayed rate is unlikely to occur when transducers are connected to a patient Page 12 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 WEEE and RoHS Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC There is an increasing interest in the proper disposal of used electronic equipment The European Union E
7. No sound from loudspeaker Verify the system is on and that the fuses are intact Check volume control is set high Check that a transducer has been connected If possible change the transducer No FHR information on display or FH trace printed on recorder Check that a transducer has been connected Check connection of the transducer Check for audio FH complex and reposition transducer until clearly heard Unit will not operate from batteries Verify the system is on and that the fuses are intact Leave the unit for 5 Hours to charge with mains connected Check on off button is pressed FetatrackDD250 Service Manual Issuel Page 9 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 Maintenance The following are the user preventative maintenance tasks It is recommended that these be performed on a regular basis at a frequency determined by the usage of the equipment but not less than once every month WARNING Before undertaking any of these tasks disconnect the unit from the mains General Check all cables connectors and transducers for damage and repair or replace where necessary The repair may involve your local service centre supplier or Ultrasound Technologies Ltd For advise on any damaged part contact them immediately Cleaning Enclosure Clea
8. Obstetrics The DD250 can be used to detect the beating fetal heart from approximately the 10th week of gestation though this will vary between patients Apply a liberal amount of coupling gel to the area just above the symphysis pubis and position the transducer face flat against the abdomen Tilt the transducer slowly until the fetal heart is heard in the loudspeaker or headset in early pregnancy the headset helps to eliminate ambient noise making it easier to detect the weaker signals Later on in pregnancy the best signals are generally found higher up the abdomen Avoid sliding the transducer over the abdomen as this results in an increase in the background noise and makes it more difficult to detect the fetal heart sounds The DD250 may be used to locate the position of the placenta thus aiding in the early diagnosis of placenta praevia or eliminating placental site where amniocentesis is to be performed The sound from the placenta is an indistinct swishing caused by bloodflow in many vessels There is no distinct beat pattern to the sound The vessels of the umbilical cord give rise to a higher pitched sound than the normal fetal heart with pulsations at the fetal rate FetatrackDD250 Service Manual Issuel Page 7 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 Techn
9. e VsenIP Vcc T BATTPACK4V8 D1 2 VsenOP TrefH 7 Ji E 4 8V Audio Socket 2 1 3 6 12 72 7UA j l 2 Charge F TOP Tsen with Vbat 9 6 O n 2 o a MH 10BQ040 Gnd TrefL 4 B2 O 3 Sk1 ed R14 BATTPACK4V8 J OF c MC33340 R8 R10 SON F 3 da 48V gt 4 RS232 Rx 2 d 27K 4K7 emt R13 R50 Isa 27 10K NTH4G 4LF 22K 00K a edes CE RS282 Tx 4 Ske n4 Mains On Gy del 1 A A pm EAT o A up ES S n i imi RS232 D indicators 2 E o Parts in close proximity I Socket PCB cc U3 i LM317S 12 13V D5 2 rr P 3 Vin Vout T E 2 M1 1 v2 4 A 2 eso DE Output AC power on S N cr 03 ge D ae ORGS V 12VDC 200mA 5 T R w hie 200R L sj J8 LL J10 mE NS Battery State gt xs Min dropout voltage 2V input output R6 Min output voltage for min input 11 4V 1K5 ESO R7 ous LED out n 220R Oto SiS BS J1 aR 2 5 y12 j 72 8 83 d 10K LOG dc D We J 5 m Sh A K LED in am Volume and on off switch Mai B ircuit for DD2 Volume PCB Ultrasound Technologies Ltd ains Battery circuit for 50 Lodge Way Drawn Nas Drg No D250C100 103 Copyright Portskewett Caldicot Date ultratec 2011 South Wales NP26 5PS UK Name DD250POWER 3 Sheet 1 of 1
10. 54 R19 R21 R22 TIF 5 At PRS Te 6 47 Disp1 6 10K 10K 10K C2 RS232_Tx 3 Displ 2 gt 25 bp STR STR Grp T TP5 1 Disp1 1 3 24 Dispi 3 Do sg 46 Dispi 74 i m o AS Ko 7 EL i umm Dispi 6 4 23 Dispild Bread sg 49 Dispa i FR 7 PTCO UCTSO e Tiin Ttout i ae Disp1 7 58 22 Dispi 5 10m 9 VDD gio 44 Disp2l2 4 R m did URTSO E Len zs T2in T2out NI S amp S T Disp2 2 6 21 Disp2 8 Tz 10 vss s11 59 Dispajg y SIR d PIGe oe m 42 Rtout Rtin te NP NA guum a Disp2 1 7 20 Disp2 4 EzPa 1 pi s12 42 Disp2i4 4 PTGS UTXDO Rx Data 9 R2out R2in 9 VU Disp2 6 8 19 Disp2 5 EzPcK 12 clk s13 41 Disp2 5 Aa 40 rag UCTS A s l DU 13 40 Disp2 6 9 URTST MAX3232E Disp3 2 9 18 Disp2 7 FR FR s144 4 202 41 PER m UY J A am Disp3 1 10 17 Disp3 3 44 s40 s15 99 Disp2 7 ki AB URXDI m me UY NA gt Disp3 6 11 16 Disp3 4 AS s39 s16 8 Disp3ri kael 4 Stas UTD 12 Z 15 Disp3 5 61538 s17 37 Disp3 2 4 A DispSym2 ene i 56 17 19 14 Disp3 7 17_ 3837 s18 36 Disp3 3 E PNQ1 JTAG_EN m UN AB les s1935 Disp3l4 221 PNQ4 TCLK 4 5 Telg soo 94 Dispai5 UnitShutDown 01 58 PNQ7 TDI 99 l 51 e834 oles ae EZPD 12 SPI_DIN la p Disp3 1 7 ZU ens s2232 Disp3 7 p TMS 49 EZPD O 6 i EZPQ SPI DOUT rner 54 EDO 21 5136 S32 S23 DispSym1 14 a 36 EZPCK 14 SPI_CLK Eze cae gt _ 31 S24 DispSym2 15 spi cs 1 EZPCS A 24 930 S25 22 ED
11. P Nancollis k nancollis CHECK CY or Oc Ow Nm mw O z MATERIAL STANDARD DRAWN CHECK APPROVED TITLE SCALE Ee TOLERANCES ULTRA TEC ee 1 2 x o etatrac P Nancollis ULTRASOUND TECHNOLOGIES LTD oo 40 15 0 00 FINISH ALL RIGHTS RESERVED E B DRAWING No m nciosure ase EXE B e D THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION e tana mbi CERRY EREE assembly pD2soD118 202 f E TARTA o y o y File file store design Designs Ultrasound 310 Drawings Details DD250D118 102 Assembly Enclosure Base dwg iis REESE A D fo Fit the main PCB into the enclosure Secure mains inlet using and secure with 6 M3x8 Self Tapping e M3x8 Self Tapping Screws 961 0079 00 with M3 plain screws 961 0079 00 and shakeproof washers Ensure the transducer cable exits the to the side of the PCB A O E O Insert the moins inlet into the opening in the enclosure before owering the PCB onto the mounting g csse if O A NA O O i i NS m DATE 20 07 10 Lo AWN P Nancollis _ HECK OP A E A E E O e H 4 ajo lt MATERIAL STANDARD DRAWN CHECK APPROVED TITLE SCALE DIMENSIONS DO o e db Nancollis ULTRASOUND TECHNOLOGIES LTD Fetatrack DD250 0 0 05 ALL RIGHTS RESERVED Baan ae ed FINISH 000 20 2 3rd ANGLE Enclosure Base 0 000 40 1 PROJECTION OF TE DOCUMENT OR OF THE ITEMS SHOWN THEREON MAY BE id ATT e S aa MADE WIT
12. 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 unit s EM immunity during routine operation we suggest that the source of EM disturbance is identified and its emissions reduced If the user has any doubt regarding the identification and resolution of adverse EM conditions they may contact Ultrasound Technologies Ltd to seek advice EMC Testing During conformity testing the Fetatrack DD250 was subjected to International Standard EMC tests During the majority of these tests no non conformances were observed During EN60601 1 1 2001 testing the FetaTrack DD250 was shown to be susceptible to the following tests Effect was a displayed rate of 115 to 125 bpm at each harmonic and sub Conductive Test applied a 3Vrms RF magnetic harmonic of the transducer frequency disturbance induced field to transducer cables with a 2Hz No disturbance was detected at other by applied RF field modulation frequencies Effect was a disturbance to the UA transducer causing a static UA Radiated RF Test applied 3V m 80Mz to 2 5GHz reading of up to 9 units Electrical fast Test applied 2KV AC power Effect was a FHR reading of 198 BPM transients and bursts 1KV Signal Cables Test applied 2KV 4Kv 8KV Air Discharge
13. fed to output transistor Q3 that drives the transmitter crystal in the transducer The signal is fed to the transducer via a tuned transformer L2 C20 the output impedance of which is set correctly to match the transducer crystal impedance The output drive signal is nominally 1 5V Pk FetatrackDD250 Service Manual Issuel Page 16 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 Circuit Description Receiver and Detector The reflected Doppler signal is fed via a resonant transformer L4 C25 to the gate of Q5 the drain of this FET connects to the source of Q4 to form a cascode amplifier the drain of which contains the resonant circuit L3 C21 From the drain of Q4 the amplitude complex of the received signal is detected by passing the signal through synchronous detector Q6 with the high frequency signals being filtered by R12 and C15 The raw low frequency complex is then amplified and filtered by U1 where its associated components form a band pass filter amplifier with a bandwidth of 150Hz to 1KHz for the obstetrics or 300Hz to 4KHz in the vascular transducer This signal is passed to the main unit via the retractile cable the following descriptions and circuit references refer to the PD1 plus s3 circuits Audio Amplifier The audio signal is routed via t
14. may be performed without removal of the circuit board from the unit Performance Checks The following procedure is intended to provide a means of determining the functional status of the unit It should be included as part of a preventive maintenance plan and should be performed on a regular basis 1 Plug the monitor line cord into a grounded receptacle of suitable line voltage and frequency as indicated on the rear panel of the FETATRACK DD250 2 Turn monitor on The green front panel LED will illuminate 3 The display will first show the system selftest followed by the software revision this indicates the instrument is switched on and awaiting inputs Ultrasound 4 Connect an ultrasound probe to the retractile cable and increase volume 5 Place transducer in palm of hand and gently stroke the back of the hand at a constant rate of about 2 times a second 6 Check audio volume is present digital display will display the simulated rate approx 120 FetatrackDD250 Service Manual Issue Page 18 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 Drawings The following pages contain drawing data to assist in the service of the product Parts lists Bills of material Fetatrack DD250 Mains Battery Circuit Fetatrack DD250 PD1 Plus Circuit Fetatrack DD250
15. the included M10 nut and shakeproof washer Do not overtighten when using the ring spanner or the thread on the volume control could become damaged M10 LED to Volume PCB Cable Wire in from top of PCB Wire in from bottom of PCB Milo DATE 20 087 Y e BRAWN P Nancolis PP gt CY g cueek JANNO fT pO MATERIAL ee epee DRAWN CHECK APPROVED U LTRA TE C TITLE SCALE om USED Fetatrack DD250 ius P Nancollis ULTRASOUND TECHNOLOGIES LTD lt Fit the Volume Control into the Enclosure and os so eamm 0 5 ENDS 0 00 40 2 3rd ANGLE RARE A Enclosure Top THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION 0 000 Beel oE iu RE CORAT Omens Pasa E Assembly DD250D121 201 ANGULA R 7 DO NOT SCALE PRINT i A oo a 2 Bigpit filestore design Designs Ultrasound DD250 Drawings DD250D121 101 Assembly Enclosure Top dwg C A D DRAWING o B 0 J 0D Jj E p F Ensure the label recess is clean and free from debris Carefully attach the Screen Label to the label recess Fit the Omeg vi Spline 00009 o o 0 o 9o O adaptor into the Cliff Ko0l Knob Secure using Loctite Gel Ensure the Standby Logo sits vertical when the unit is at 30Z Volume before bonding ultrasound technologies Fit the Cliff K50l knob 100 1154 00 to the Umeg Pot Switch issuE Ji OOOOOIY DATE 22 07 19 ob o2OOOOY DRAWN P Nanolis Jp _ CHECK POP JANNO T
16. unit via an IEC 3pin mains inlet J5 where it is routed to spade jumpers J14 J15 J16 J17 J18 this allows the unit to be set to 110V or 220V input voltages WARNING ELECTROCUTION RISK Mains voltages are present at these points and adjustment MUST NOT be untertaken with the mains lead connected NO electrical TEST SERVICE or INSPECTION of the board should be undertaken without the board being fitted to the base of the DD250 The selected mains voltage is converted into the unit s operating voltage of 14 16VDC by passing via an encapsulated toroidal transformer T1 L1 to remove any common mode signals and D3 a diode bridge rectifier The resultant DC voltage is smoothed by C5 and C6 When mains is connected and turned on the mains inlet on off switch is illuminated green this is also mirrored by the DC supply illuminating D7 via R2 The Doppler circuits are powered from the mains derived DC after it has been regulated to 10V by U3 and passes through D5 where D6 blocks current being drawn from the batteries With the mains connected and switched on the batteries will be placed into a charge mode The state of this mode is indicated by the rate of flashing of D8 The charge controller U2 varies the rate of charge dependent on the state of battery packs B1 and B2 and allows a current source of 500mA U1 to be connected or disconnected from the batteries until a set charge state is reached R9 and D4 allow a trickle charge to be presen
17. 10 7 3V U6 enables the battery ICON on the LCD display the following descriptions and circuit references refer to the PD1 doppler transducer circuits Ultrasound Transducer The ultrasound transducer operates on the continuous wave Doppler principle There are a number of transducer frequencies suitable for different applications however the basic operating principles are identical Each transducer consists of a pair of piezo ceramic crystals each crystal pair is arranged as a transmitter and receiver the ultrasonic output beam is focused through a lens or faceplate With all the transducers the electronics are housed in the probe The oscillator and detector are built up of four discrete sections These are the master oscillator transmitter amplifier receiver amplifier and detector These operate to produce a continuous wave ultrasound signal that is passed to the transmitting crystal in the transducer The signal is then reflected from moving interfaces within the body to the receiver crystal in the transducer amplified and then detected so the audio Doppler shift of that moving interface can be heard audibly and or converted into a velocity signal Oscillator and Transmitter Amplifier Field effect transistor Q2 with L1 C16 C17 and associated components form a Colpitts oscillator This oscillator runs at a nominal frequency of 2 3 5 or 8MHz producing a sinewave of amplitude of approximately 5V Pk The signal is then
18. 427093 EMAIL service doppler co uk This service manual contains circuit descriptions diagrams parts and spares lists for the FETATRACK DD250 To maintain the FETATRACK DD250 s performance it is recommended that it be included in a periodic maintenance program The user preventative maintenance program is covered in this manual Maintenance outside the scope of the user should be undertaken on an annual basis by trained service personnel full details are available from your supplier service centre or from Ultrasound Technologies Ltd The FETATRACK DD250 is supplied complete with the following Choice of 2 3 5 8MHz doppler probes ee Ultrasound Coupling Gel 0 25ltr AC line cord FetatrackDD250 Service Manual Issuel Page 1 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 F 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd e Safety Special Precautions Your FETATRACK DD250 has been designed for electrical safety All the safety and operating instructions should be read before operating the FETATRACK DD250 Failure to do so could result in injury to the user patient or damage to the system and accessories Electrical Shock Hazard Do not defeat the grounding integrity of this system Protection against electrical shock in the event of failure of basic insulation is provided by the connection of the chas
19. 61 Loudspeaker PD1 Plus s3 Audio Circuit Ultrasound Technologies Ltd Lodge Way Drawn NAS Drg No 100 0002 00 Copyright Portskewett Caldicot Date ultratec 2007 South Wales NP26 5PS Name PD1PLUS3 Sheet 1 of 2 LCD Interface Dispi 1 7 Jos U8 100nF Disp2r1 7 U5 i 2 ear al C1 V bp 1 is s2 52 Dispi 1 933 2 sg 51 Disp1 2 3 lo gels Pu 4 99 Displ 3H 4 038 r DispSym1 4 49 Disp1 4 m C24 00nF SK2 peer g5 oe Sp Tn t RS232 Rx 2 1 Ru B R R se 8 Dispi
20. HOUT THE COPYRIGHT OWNERS PERMISSION Assem bly DD250D118 302 3 A eS OOOO OO Bigpit filestore design Designs Ultrasound DD250 Drawings DD250D118 102 Assembly Enclosure Bose dwg C A D D R AWI N e 4 Socket to PD1 PCB DD250D1159 Solder the wires onto the PCB according to the table SOCKET PCB J6 Fit the wired Socket and LED PCBs into the enclosure in the locations shown Secure in place with 3140 Silicone Rubber applied around the Apply a layer of Araldite adhesive to the magnet recesses and fit 2 15x5mm Magnets 900 0132 00 Press the magnets fully into the recesses and apply additional Araldite around the top edge of the magnets pegs PIN1 Red Ensure that the polarity of the PIN 2 Yellow magnets is aligned PIN 3 Black PIN 4 White PIN 5 Violet To ensure aligned magnet polarities slide the magnets apart from their storage spacer retaining their storage alignment Fit the magnets immediately after separating from their ED to storage state Volume Control PCB DD250D112 gt WARNING J7 Violet Solder the wires onto the PCB according to the table above The magnets are very powerful Do not allow magnets to pull together as they could fracture and or damage trapped skin Keep away from credit cards mobile phones computers and programmable devices The magnets could cause damage to these devices and result in data loss DATE 20 07 10
21. Pocket Doppler Transducer 2MHz Fetatrack DD250 Pocket Doppler Transducer 5MHz Fetatrack DD250 Pocket Doppler Transducer 8MHz Circuit Data Fetatrack DD250 Mains Battery Circuit Fetatrack DD250 PD1 Plus s3 Audio Circuit Fetatrack DD250 PD1 Plus s3 Digital Signal Processor Fetatrack DD250 Pocket Doppler Fetal Transducer 2MHz Assembly Drawings Fetatrack DD250 Assembly Base Fetatrack DD250 Assembly Top Fetatrack DD250 Assembly Main PCB Fetatrack DD250 Assembly PD1 Plus PCB Fetatrack DD250 Assembly Main FetatrackDD250 Service Manual Issue Page 19 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 J1 2 3 4 5 6 7 Q1 Vrt BC848B ES oO TT 1 4 10651 dE RE Oy AE 20 E 0 E 6 C12 016 3 TxSig gt R2
22. RD DRAWN CHECK APPROVED TITLE D EN s Fetat k DD250 Ce eee etatrac P Nancollis ULTRASOUND TECHNOLOGIES LTD oo 05 FINISH 0 00 40 2 3rd ANGLE Pei dent ae PD1 PCB THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION 0 000 PROJECTION MADE WITHOUT THE COPYRIGHT OWNERS PERMISSION Assembly ANGULAR DO NOT SCALE PRINT 13 22 07 10 DRAWING No DDZ50D122 101 A Oooo SS Assembly PD1 PCB dwg C A D DRAWING uy IS de Solder the DD21 Mains Inlet 900 0134 00 into position on the PCB 4 90 Ensure the Mains inlet sits 4 5mm off the PCB AZ J EES LJ Remove the backing on the doubles sided tape and fit the assembled battery packs to the PCB o oe o solder the legs of the battery pack onto the PCB O J O O al O l O 4 STANDARD alae MN m DRAWN CHECK APPROVED ULTRA TEC TITLE o a Fetatrack DD250 P Nancollis ULTRASOUND TECHNOLOGIES LTD DRAWING No Su 10 0 05 ALL RIGHTS RESERVED Main PCB 209 302 gt ON Saa THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION DM Fx PROJECTION O OR OF TE MS SHOM neo WAY BE Assembly DD250D119 101 o o8 1 9 T o T e y e T o Bigpit files tore design Designs Ultrasound DD250 Drawings DD250D119 101 Assembly Main PCB dwg de A D D R AW N e Close the Top of the enclosure on to the bottom of the enclosure Ensure oll the mounting points ore aligned and that the two
23. T pa MATERIAL EI DRAWN CHECK APPROVED U LTRA TE C TITLE SCALE dicc USED ON 1 Jp N lli ULTRASOUND TECHNOLOGIES LTD FETATRACK DD250 i og iog pena anne Na uo ib 000 402 3rd ANGLE ALL RIGHTS RESERVED tees e o000 z01 PROJECTION THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION TATT ME E du RM Seay APRI WE Assembly manta A 121 401 ANGULA p DO NOT SCALE PRI c S SO NE ee E AA Era 101 Assembly Enclosure Top dwg ds d A D DR um ee Remove Serial Jack Socket Remove Headphone Jack Socket m en Uo 9 9 9 2 9 Em Emi o o o o o o BERI Sem WES ye 1s m g t Inm A o J EN o Ny EE X1 Je o 000000 O Remove Volume Control Revove ZIF Connector Eo A IN FF Fit 2 Way Molex Header to J3 m 0000000 299 sa us MINT icas mu i E o n Ree ug m amp o DEMI E E E I O HE ce MIMMI co BE a cn gt EH o za c E mu IIIN a Xi JS o 0000 o MGR C 0o0o0ooo g g m Fit 4 Way Molex B ur jg meat EE y mmr MO A Header to J4 di a i pins 1 4 cos Regi Header should tH X be angled at 60 uin E NH as shown m c7 EER2 Solder the DC Power cable DD250D110 gt to Ji according to the table PDi PCB Jl PIN 1 Red E UN PIN 2 Block que NM a O88 p Ww rr cm mpg 2 zm ENE R3 gs O y O O u O Connector q must clear the adjacent capacitor MATERIAL STANDA
24. U has developed the WEEE Waste Electrical and Electronic Equipment Directive to ensure that systems for collection treatment and recycling of electronic waste will be in place throughout the European Union Ultrasound Technologies Position with regard to the WEEE Directive Product recycling is nothing new and Ultrasound Technologies have implemented processes in each member state where the company has a presence Ultrasound Technologies will comply with the provisions of the WEEE Directive and national implementing legislation Instructions for Disposal of Waste Equipment by Users in Private Households of with your other household waste Instead it is your responsibility to dispose of your waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For more information about where you can drop off your waste equipment for recycling please contact your local waste disposal authority your household waste disposal service or the supplier where you purchased the product R This symbol on the product or on its packaging indicates that this product must not be disposed HEN As a producer of electronic devices Ultrasound Technologies will provide for the
25. Ultrasound Technologies Ltd fetatrack DD250 desk doppler Service Manual Issue 1 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 Contents ABOUT THIS MANUAL E 1 PFET INU nn R ee EE A E m 2 Special ai 67 gt U1 2 TNNT 2 VS Call SNOCK nz A 2 EXDIOS ION A eae i MER RET E ee ere ee eee ere eer ee ee ee eee eer 2 Handling the Delicate Transducers mein oie 3 y lee 3 5171219 IN E EE 3 PARTS AND THEIR FUNC TIONS ento ete eee 4 o o En O T S 4 A Af A 9 mi seire groom T 5 TROUBLES ROG T IN eee a e a E AE A E E E 9 ING Display Information on LO Dy e o ESO O 9 Unit Docs oa Ne MAMA TN T 9 N Sound From Loudspeakers MAA e iina aiiai ni aani dini haiei pui iMd tse mtostudEdE 9 ING FAHR enisi o 9 Acid A eE 9 MAINTENANC c n 10 tc MRCCTKE 10 System En PI A 10 io ONS sated P A A N EEA A E nue 10 ENMIRONMENTAL P 11 Electrommagnetic Compatibility acre desist reectiesiowtnaironroicdaed palewnicistonicae tdi ipie frito 12 WEEE And ROR det mms 13 Bien ici A ee ie Emm 14 Gr go DESCUIDO NR UR
26. VER use alcohol or mineral oil as an acoustic coupling agent as transducer face and cable damage will occur ONLY use approved ultrasound coupling gels Symbols Used The following symbols are used on the FETATRACK DD250 and are in accordance with BS EN60601 1 2006 Where they are associated with the connection of external equipment that equipment must meet the relevant safety standards in all cases Type B equipment A Consult accompanying documents N Alternating Mains Current X DOTT GISDOSPRCOT WILNOHE aa normal waste ha On Off Battery Charge Discharge state FetatrackDD250 Service Manual Issue 1 Page 3 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 System Operation FETATRACK DD250 Front Panel Controls The front panel control area contains 1 button and one rotary volume contol these controls are combinded C A E A IEC 3pin mains cord inlet B Illuminated Mains on off switch The mains switch is illuminated green when AC mains power is connected and the switch is on a green mains on indicator C is also situated on the units front panel D Serial RS232 connection E Headset connection F Volume Control unit on push switch FetatrackDD250 Service Manual Issue Page 4 Ultrasound Technologies Ltd Lo
27. changeable transducers The DD250 can take a choice of 4 transducers 2 for fetal heart rate detection 2 and 3 MHz and 2 for vascular flow detection 5 and 8MHz The DD250 provides for the audio presentation of the fetal or vascular signal as well as digital fetal heart rate detection with the fetal heart rate displayed on an LCD display RS232 data port is included for the transfer of data to a PC to review the fetal heart rate traces B FetatrackDD250 Service Manual Issuel Page 6 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 System Operation The DD250 includes a storage area from 2 transducers A These are held in place using magnetic retention There is a choice of up to 4 transducers that can be used with the DD250 2 for fetal use and 2 for vascular use These are connected to the DD250 using a retractile cable with a latching connector The selected transducer B is connected to the unit by the connector C to disconnect pull back on the outer cover of the connector DO NOT TWIST To connect a transducer align the red dots and lightly push the connector into the transducer socket The transducers are colour coded at the socket to indicate frequency Transducer colour coding Connector ring colour 2MHz Red 3MHz Orange 5MHz Green
28. dge 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 System Operation RS232 Output This output is for the connection of an external computer for data transfer The maximum voltage that can be applied to this output is 15VDC WARNING Any external equipment connected to this output must meet the equivalent MEDICAL safety standard to this product Connection must only be made by a qualified technician An isolation connection may be necessary when connection is to be made to a personal computer Transducer Input Transducers are connected via the pug on the retractile cable This is for the connection of Fetatrack DD250 transducers ONLY The maximum voltage that can be applied to this output is 15VDC FetatrackDD250 Service Manual Issuel Page 5 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 System Operation Operating the FETATRACK DD250 In this section information is supplied which will help you use the FETATRACK DD250 for the fist time General The DD250 is a mains or rechargeable battery operated desk Doppler designed to suit the needs of the General Practitioner and clinic where multiple disciplines require inter
29. e PIN 3 VIOLET SKe PIN 4 N C f WOO OOOO oe eee LS DATE 20 087 Y e BRAWN P Nancolis PP g cueexk JANNO fT pO ean STANDARD DRAWN CHECK APPROVED TITLE SCALE DIMENSIONS USED TOLERANCES ULTRA TEC os ci Fetatrack DD250 ULTRASOUND TECHNOLOGIES LTD DRAWING No 3rd ANGLE ALL RIGHTS RESERVED Enclosure To p PROJECTION OF THE DOCUMENT OR OF THE ITEMS SHOWN THEREON MAY BE MU ro er SD aa MADE WITHOUT THE COPYRIGHT OWNERS PERMISSION Assemb ly DD250D121 301 A A ooo o a O MM O A AAA SES NEUE CE a Bigpit filestore design Designs Ultrasound DD250 Drawings DD250D121 101 Assembly Enclosure Top dwg de A D D R AWI N e Secure PDi PCB using 4 M3x8 PT Self Tapping screws Solder the Accessory Socket 961 0079 00 with M3 Plain PCB wires onto the PD1 PCB 8 AA ee b ee eee eee eee eee VOLUME PCB Jil Solder the LED Cable DD250D112 onto the y PIN 1 Red Volume PCB Jii according Dus o UN to the toble PIN 3 Yellow Volume PCB to Solder the wires PIN 4 Violet PDi PCB Cable onto the PCB DD250D114 gt according to the Volume PCB to Main tables PCB Cable DD250D113 VOLUME PCB J13 PIN 1 Red VOLUME PCB J12 PIN 2 Black 4 PIN3 Yellow PIN 1 Red PIN 4 White PIN 2 Black PIN 5 Violet PINS Yellow PIN 4 Violet Solder the OMEG volume control 500 0121 00 on to the PCB Ensure the volume control sits flat and flush to the PCB secure using
30. financing of the treatment and recycling of waste returned through these designated collection points in accordance with local requirements Instructions for Disposal of Waste Equipment by Commercial Users For users of Ultrasound Technologies equipment other than private households Ultrasound Technologies will provide free recycling of equivalent medical electronic equipment once a customer has returned the equipment to Ultrasound Technologies with all transport and importation costs paid and where a replacement product is being supplied by Ultrasound Technologies Where a replacement product is not being supplied recycling services may be provided on request at additional cost The RoHS Restriction of Hazardous Substances directive 2002 95 EC compliments the WEEE Directive by banning the presence of specific hazardous substances in the products at the point of manufacture Ultrasound Technologies is a manufacturer of Medical Devices and is currently exempt from this directive However at Ultrasound Technologies we take our responsibilities to the environment very seriously and currently 100 of our entire manufacturing process and parts meet the RoHS directive and we are therefore fully compliant FetatrackDD250 Service Manual Issue Page 13 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 F 44 0 1291427093 E ultratec doppler co uk W www dop
31. halves are firmly mated C BR M4x12 PT Self Tapping Screws 961 0081 00 Ensure that all screws are tight and the case halves sit tightly together Secure the enclosure with 6 x ISSUE Tt DATE 2007710 bL OOOO DRAWN CHECK A N NO MATERIAL STANDARD DRAWN CHECK APPROVED TITLE SCALE dic USED UE ULTRA EC LE DURER s l1 etatrac ALL RIGHTS RESERVED FINISH Final Assembl 0 00 0 2 5rd ANGLE THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION y 0 000 PROJECTION OF THE DOCUMENT OR OF THE ITEMS SHOWN THEREON MAY BE DD250D123 101 T MADE WITHOUT THE COPYRIGHT OWNERS PERMISSION M D Es A a A Connect the transducer Connect the DC Connect the LED Cable deves cobe to Ja E to J4 on the PDI from the Volume PCB J12 on the Moin PCB to Jl on the Main PCB ANGULAR DO NOT SCALE PRIN A AAA A OA RA TAO ROT Bigpit files tore design Designs Ultrasound DD250 Drawings DD250D123 101 Assembly Final cdwo C A D D R AWI N G
32. he retractile cable to J4 pin 4 on the audio circuit board The signal passes through the potentiometer VR1 to the audio amplifier U3 where it is amplified and output to the loudspeaker connected to J3 Digital Signal Processing The audio signal is fed from the band pass amplifier U4d through the AGC circuit formed around U4c and U7 The microprocessor controls in input gain to maximise the signal between the limits of 1V and 4 5V at the A D converter The signal then passed via the average value circuit U4b and U4a and into the A D converter U6 pin 25 The digitally converted signal is correlated to find the input rate which is displayed on the LCD display driven by the display interface circuit U5 RS232 data output of the rate information is provided at connector SK2 as a digital RS232 stream from U8 of 5Vdc FetatrackDD250 Service Manual Issue 1 Page 17 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 Performance Checks Introduction The following sections details tests to ensure that the FETATRACK DD250 is operating within specification These tests may be performed in whole or part however if any repairs are carried out to the power supply circuits then it is recommended that the whole test calibration procedure is undertaken The test procedures
33. l 43 3 OV 74HC4066 T FHR Agc Copyright Portskewett Caldicot Date ultratec 2007 South Wales NP26 5PS UK Name PD1PLUS3 Sheet 2 of 2 AA A gt gt MATERIAL STANDARD DRAWN CHECK APPROVED TITLE SCALE DIMENSIONS ic ii Fetatrack DD250 me me 0 25 etatrac oo 015 P Nancollis ULTRASOUND TECHNOLOGIES LTD DRAWING No Fit Tappex M8 Trisert Part No 345M8 02 into 2 central bosses Ensure inserts sit flush with the bottom of the enclosure Attach adhesive feet 900 0138 00 to the base of the unit Ensure the recess is clean and dry before attaching oc ISSUE i p JJ j p cr pp pp p m DATE 20707710 CY S DRAWN P Nancolis Ff Eo Eoo o LLL LLL L 2 CHECK lo ANNO Tt RA A A A ee SA E ALL RIGHTS RESERVED FINISH Enclosure Base 2 00 B e D THIS DOCUMENT IS SUPPLIED IN CONFIDENCE NO REPRODUCTION mE m eria TR LEY PRET issemby 0025001 18 102 A AA A EA qq nh FT d eee File file storeNdesignNDesignsNUltrasoundN310NDrawingsNDetailsNDD250D118 102 Assembly Enclosure Base dwg C A D DRAWING 4 BE Feed the transducer Molex Housing cable into the enclosure and through the cable PIN 1 RED Clamp PIN 2 BLACK SCREEN TAIL Fit the Molex 4 way PIN 3 N C housing to the cable PIN 4 WHITE according to the table A WENN 101 ISSUE Tt pp y DAE 20 07 10 24 01 31 DRAWN
34. l Issuel Page 8 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 Troubleshooting The information in this section will help you to check and correct common operation and system problems Refer to the troubleshooting hints which deal with your problem Perform the suggested steps If the problem is not solved check once again to make sure that you have used all of the suggested steps to resolve the problem Electronic failures and service procedures are not included in this manual as all servicing of the system must be performed by a qualified service technician Valuable time however can be saved by documenting the problem In general when you have a problem check your control settings to be sure that they are in proper operating position Consult the appropriate section in this manual for specific information on particular controls or operating modes WARNING Disconnect system from the power source before checking fuses and connections Check all connections and fuses Replace fuses with same type and rating as indicated on the rear panel of the unit No display information on LCD Verify the system is on and that the fuses are intact Keyboard does not respond Reset system by turning off then back on Verify the system is on and that the fuses are intact
35. n the exterior of the system with a soft dry cloth In the event of stubborn spots disconnect the system from the power source Use a soft cloth that has been dampened not soaked in a mild detergent solution Be sure to keep excess moisture from entering the cabinet via any openings that may be present Cleaning Transducers Use a cloth dampened in a mild detergent solution to clean the transducer and cable Remove all traces of the detergent by wiping with a cloth dampened in clear water Never soak the transducer cable or connector WARNING Transducers must never be exposed to gas or heat sterilization or be left immersed in any liquid for more that a few seconds FetatrackDD250 Service Manual Issue Page 10 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 Type Transducer Operating Frequency Power Output Audio Audio output Signal Processing Range CONTROLS Keys Controls Indicators POWER SUPPLY Voltage Power Battery Charge Life Battery Charge Time ENCLOSURE Material Size Weight ENVIRONMENTAL Working temperature Relative humidity Storage Transport temperature COMPUTER INTERFACE Transfer Data Rate Data Standard Data Format SAFETY Classification Ultrasound Technologies Ltd Specification Continuous Doppler 2 c
36. noone pps H 24 5 25 529 S26 28 2 CLKMODO R32 E Y 26 cog s27 2 fetal_signal_complex ANO 1KO O BatteryCondition 01 26 ant scL 8 mE geli HO Unit Programming Interface V6108 27 AN2 spa 2 Vcc is 3 3V 28 ang ee 36 AN4 ALLPST gt gt 5 ANS TEST 3 TP13 Be 34 dr 34 ANG z 33 RSTI 9 reset 33 AN7 EN RSTO o N G40 a 31 VRH EXTAL A EXTAL device power on reset tuFI 30 46 C31 VRL XTAL ae xi zs 22pF R31 x 1M a Vstby 22 els 11 05920MHz XTAL MCF5212CAE66 Lasa 5 bk ote _ Pr z SA 2x Q 20 z E 3 IS 2S 2 E S E i us TES Y ha Low Bass filter fo 220Hz 1 out INLS TP4 E 202 g P DM E S z C35 C36 C39 Me A 7 gt 2 100nF 100nF 10uF ZLC41 C42 mm aaron Dx ex 2 TP2 p 3s 100nF 100nF sn ES ES E O ee 7 gu 2 ZSR330G x P e 100K fis P l f dur QA R12 uA Pi E ims2am Hep quita AudioComplex 01 Fetal Complex S Ns D OE 14 lt LM324M 1 E fetal signal complex o S 1N bS ISP sone owPass Filter 5Hz x D C ni3 LowPass Filter 5Hz E e D3 Z N T 68K a V BZX84C2V7 _ V L a SS js R23 R24 R26 R27 R29 T 10K 10K 10K 10K 10K U7 c 2 13 ge YA CONTA Agct ome lt XA June 98 3 5 Sept 99 YB CONTB Agc2 MURS XB June 00 9 6 Aug 02 YC CONTC Agc3 Danos XC Aug 05 10 vp conto H Agc4 Aug 07 XD 11 Ultrasound Technologies Ltd PD1 PluS s3 Digital Signal Processor SUR Lodge Way Drawn NAS Drg No 100 0002 00 Note Power Rai
37. ologies Ltd System Operation Vascular The DD250 can be used to detect both surface vessels deeper arteries and veins using either the 5MHz or 8MHz transducers To obtain the best signal apply a liberal amount of coupling gel to the area of the vein or artery under investigation Tilt the transducer at approximately 45 degrees to the vessel Arteries give a high pitched pulsatile sound with veins giving a sound like a roaring wind The optional headset helps to eliminate ambient noise making it easier to detect the weaker signals It is also usual for the DD250 to be used in association with a pressure cuff and sphygmomanometer to indicate the location and extent of arterial occlusion in the form of ankle brachial pressure index and segmental pressures Due to the variation of leg blood pressure over a wide range with the systemic pressure the actual values are less useful than the pressure index which relates the ankle pressure to the pressure obtained at the brachial artery Using the DD250 to measure both pressures will ensure compatibility In cases where patients have peripheral arterial disease using the DD250 due to its high sensitivity can be the only technique suitable for the measurement of leg blood pressure Pressure Index Ankle systolic pressure Brachial systolic pressure Normal ankle systolic pressure gt brachial pressure Normal pressure index gt 1 Abnormal pressure index lt 1 FetatrackDD250 Service Manua
38. pler co uk Ultrasound Technologies Ltd Disassembly Dismantling Procedure WARNING ELECTROCUTION RISK Mains voltages are present at these points and adjustment MUST NOT be untertaken with the mains lead connected NO electrical TEST SERVICE or INSPECTION of the board should be undertaken without the board being fitted to the base of the DD250 Note Before disassembling the unit unplug the transducers accessories cable if present and the power cord from the instrument To remove the Top Cover remove the four screws around the edge on the bottom of the unit and carefully lift the lid upwards The Top Cover can now be removed taking care to disconnect the connections between the lid and the base Internal Layout The mains and charge board are connected to the base and the audio and compute board to the lid FetatrackDD250 Service Manual Issuel Page 14 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 Circuit Description Technical Descriptions The following sections provides a technical explanation of each of the sections within the Fetatrack DD250 and its accompanying transducers Unit Power Supply The unit operates from either a mains connection or the internal rechargeable battery packs B1 and B2 Mains voltage is supplied to the
39. rystal narrow beam option of 2 3 5 8 MHz 10 5bmW cm SATA 2 3 MHz fetal probe 15mW cm SATA 5 and 8MHz vascular probe Response 300Hz 1KHz 2 3 MHz fetal 300HZ 4KHz 5 8 MHz vascular 500mW Software AUTOCORRELATOR 50 to 210 bom 1 key for unit on off Push Volume control Rotary Volume LCD Display with icon for battery low and pulse battery charge LED mains on LED 100 130 VAC or 200 260 VAC 46 64 Hz 20VA gt 30 hours of use battery s will self discharge when not used lt 5 Hours Plastic PCABS 32x19x6cm 1 9kg 10C to 40 30 to 75 10 C to 70 C 3 wire RS232 9600 baud 8 bits no parity 1 stop bit UltraTec Comms Standard Complies with EN60101 1 2006 Class 1 Type B The following Consumables are available for use with the FETATRACK DD250 Power Cord Coupling gel 0 25ltr 12 per box This Equipment complies with the essential requirements of the European Council Directive 93 42 EEC 0120 FetatrackDD250 Service Manual Issue Page 11 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 Electromagnetic Compatibility Guidelines for Identifying and resolving adverse EMC conditions Emissions Care has been taken through the design and manufacturing processes to minimise the EM emissions that may
40. sis to the safety ground Safety grounding occurs only when the 3 wire cable and plug provided with the system are connected to a properly grounded receptacle Do not remove the system cover The system should be serviced by trained and qualified personnel only Contacting the hazardous voltages within the system could cause serious injury Do not use the system if the power cord has any cuts or openings Do not use the transducer if the cable has any cuts or openings Do not use the transducer if the transducer face is cracked or chipped Do not immerse the transducer cable connectors in any liquids Should the electrical safety fuses have to be replaced use only fuses of the same type and rating Explosion Hazard Do not operate or use this system in the presence of flammable anesthetics gases or oxygen rich environments as it could lead to explosion FetatrackDD250 Service Manual Issue Page 2 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 Safety Handling the Delicate Transducers The transducers are delicate parts of the ultrasound system and should be treated with care The delicate crystals in the transducer may crack and render the transducer unusable if the transducer is subject to shock Room temperature liquids should be used for cleaning NE
41. t at all charge states Temperature state of the batteries is monitored by R14 and U2 When there is no mains connected current is supplied to the Doppler system from the battery packs B1 and B2 via diode D6 Fuse F1 protects the batteries and circuits from any short circuits The Doppler circuits are connected to the power supply at J2 FetatrackDD250 Service Manual Issuel Page 15 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 F 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description the following descriptions and circuit references refer to the PD1 plus s3 circuits The Doppler detection circuits are turned on by the pressing the volume control which activates an integral push push switch which is mounted on the front of the unit Closing the switch grounds the CLK input of U2 pin 11 the output on pin 12 switches on Q2 allowing current to flow into the various circuits The unit will remain switched on for approximately 3 minutes from the last detected signal monitored by U6 after which it turns off automatically U6 activates Q1 which pulls the clock signal at U2 pin 11 low unless the user forces the unit off by pressing the ON OFF switch again Battery Low Indicator U6 also monitors the input voltage via R9 and R10 When the voltage on pin 26 drops below the threshold set by R9 and R
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