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fetatrack 310 fetal monitor - Ultrasound Technologies Ltd.

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5. 35 84 24422552 4 48 555 2 3225054 0 54455 550 55 19 iniernal Layout E 19 Cueut DSS CTD p BRNO 20 0 lu ee ee 20 Ce 21 Oscillator and Transmitter output 4 21 Receiver and 21 RUI 21 gnal Pre PrOCESSiING 22 22 CIOD 22 EVEN 22 OO SSS 23 I O u uu usay ua aaa 23 k s s m U 24 PRONTI 24 EE oo Ec 25 11116018 te 25 STONE 25 DFN 27 L ib 27 SUBEUNT 27 Assembly DrawingS TERR TUE 27 Fetatrack310 Service Manual Issue3 Page 2 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies
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7. 1111 Receiver circuit Receiver Circuit Ul pin 8 UI Pin 13 Stroking transducer Stroking Transducer but viewing very little response Riri Receiver circuit Receiver Circuit Ul Pin 14 Audio US Pin 2 Stroking Transducer Stroking Transducer but viewing very little response mad re CH1i ier 1 15151551 CH i 9 1 51515112 15151 Receiver circuit Receiver Circuit US Pin 1 US Pin 12 Stroking Transducer Stroking Transducer TIE m CHi 1 51515 mz SHEFE i 1 115151 Receiver Circuit Receiver Circuit US Pin 13 US Pin 14 Stroking Transducer Stroking Transducer i ZB iml 1 Beems Receiver Circuit Receiver Circuit U2 Pin 6 U2 Pin 7 Stroking transducer but viewing very little response Not stroking Transducer 1 1 15151 5 5 12 CH i 56 2 Receiver Circuit Receiver Circuit U2 Pin 7 U2 Pin 2 Stroking Transducer Stroking Transducer 1 GBms TEE MEE IET Receiver Circuit Receiver Circuit U2 Pin 3 U2 Pin 1 Stroking Transducer Stroking Transducer
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23. CH i ZB iml 1 11 1515 5 25 CHi Receiver Circuit Receiver Circuit U2 Pin 13 U2 Pin 14 Stroking Transducer but viewing very little response Stroking Transducer Receiver Circuit Receiver Circuit U2 Pin 9 U2 Pin 8 Stroking Transducer but viewing very little response Stroking Transducer 5 25 5 30 133HS 01 VL34 NO 435 SNOISN3WIG TIVOS LV ONNY 3755 xaloW MOTI3A aay N3349S 9v18 ama Lo MEM NOISSINY3d SY3NMO LHSIMAdOD JHL LNOHLIM 3Q0VN AVW NO3N3HL NMOHS SW3L JO LNSWNOOd JHL 40 ON SONSGISNOD NI 5 LNSWNDOC SIHL Q3 43S34M 4 9 SSISOTONHOSL GNNOSVYLIN YAN dvdl OLY MOVs8lvL3J 5 101 QNVONVIS 60 8 6 TI3NeIV 4 80004883 31899 JN338OS 44 v OuisnoH Xajow MOTI3A c Nos MOVIE cS oo m ON 3019 0c 0c 34 2 1 5 01 21140164
24. ON NI Q3nddns SIHL en eer 1 491 ar spop AS slHo TI GNNOSVYLIN TETA OLE E riven Q3sn SNOISNIWIO 95 f QNNVONVIS WIYSLVN gt gt gt T 0207 EE Ill LIO 4541 bS MZ P 1SIA 1 92 buol Wwo ____ j 2 Lo x 1 NEN 2055 34 B ONIMvdO CVO 03 0 1 a 3199 oa LOL LLPOUOLeS NMOHS SNAN JO INANNOOQ SHI 30 fa 0000 ON SONSGISNOD NI 5 LNSWNDOC SIHL NOllVMVd3Md M3AMNOJSNVMI HU GS S3I0OTONHO31 GNNOSWYLIN 5 m OLE MOVMIVI3J 2 NO 0350 SNOISN3MIQ 1 15 q PIP zo VA0 AZL X 2 a ASI XZ AJewlJd 3 Q E jeujojsuej UonpuluJJ9 ui sp Buisnoy K 0j9DjsHDs UJJjuoo oj duuuo 4 5 xejo uo duuuo pup spue duis daps spodg
25. ON N V 3755 DIP seloy Sijooupu y0 21 90 0000000 0 Ultrasound Technologies Service Engineer Guide Document contains information of signals at key points throughout the specified product Fetatrack 310 The following images are oscilloscope snap shots of signals acquired from the Fetatrack 310 main PCB and correspond to the Fetatrack 310 Power Supplies and Audio Circuit diagram Note images of digital signals that are directly linked to the microprocessor can be found on the oscilloscope image document related to the Fetatrack 310 digital central processor diagram pin 1 pin 4 AC power input AC power input z nt D19 pin 1 DC supply rail Pin 4 GND Umax 36 804 T L l L Umax 7 2819 1 T c 1 1 A A 1 ZB Q13 gate 013 gate Unit not printing Unit printing 1 Umax B80 Bm Umaxs 36 00 CHi 28 80 2H BkSa sz CHi 28 80 013 drain 013 drain Unit not printing Unit printing 25 2810 8888 CHi 268 87 Ams MIT CHi 28 811 U30 pin 1 U30 pin 1 Unit not printing Unit printing Umax CHi 28 80 U30 pin 2 Unit not printing 88 80 02000 CHi 18 80 11 base Unit not printing C
26. 4exXpedg CWO 144206 1 nonahi NAGHS 30 ININn900 4o ON SONSGISNOD NI 5 LNSWNDOC SIHL YAMYVN LNSAAS G3AN3S3Y NY OLE MOVMIVI3J 5 GNNOSVYLIN ipeum EM SNOISN3WIQ 3755 Sijooupu j see 1 194295 660 2 T ao 5 5 451099 5 5 6mpgz yo5pl9 PUD 1u9 3 34 A ONIMVMO CANA ajqo2 2587101 2210016 315101 5 JN 1 35 HMM 3wos oa 01 721001 lt 2 ON SONSGISNOD NI 5 LNSWNDOC SIHL Pag 208 000 ON YIONGSNVYL cS Q3A 4d3S34M SIH9IM G11 5 TETA 0 2 E C Q3sn SNOISN3NIGQ 41 25 HSINIJ
27. INS UINL FINIA 4OSISOY LHA GOSO AW 4 1515 cV LH S080 WOT 404515 00 9010 cC uonduoseg JequunN Wed 60TZOd TSWOTELJ OTE Peerd OO 90TO OOT G JO OVE 016619 9002 TSWOTEI OTE 42242494 aod 00 6200 008 Jequinw 60TZOd TSWOTELJ OTE Peep 90 JO 508 5 015 9002 pH punoseNIm 00 8000 006 JoonpsueJ 09 J 5 JOQUINN eres j qe 00 07 00 JEWS Joqqne PPW 00 6200 006 9 SSI JoonpsueJj OTEA 00 1200 008 52514 zzd SOUT Jo HuNsisuod 195 IASAD 00 200 008 su13bus puewes ZSN TSN Je npsueJ 09 L0 6L00 009 19103 ow 00 1900 009 MOJA 00 2000 00S 4 11 0964 5 1 501 YHA Ide 00 001 CEZE OTZO BAUM Apog JeonpsueJ 00 0 11 001 6EZE OLTZO 1eld 5ed 00 7601 001 uondu seg Hed MOJ
28. Jle 1 om E oq 88 25 ES IN BR 5 2 a oz 00 212 2 89 89 OF EN 098 i I Ne 2 uonoeuuoo 1 Ib wem 29 1 2 1001 zy80 2001 JU 40089285 2 A T vn y 159 059 TH ZSN sues O CEL 0196X NU 6 5 NOS Az 6eu cDISXH SSA so feo zsn so 9 1 JO 1 q n 906010 ain L En 5 H 20 21 IMA ONI 0 LO ONI amp S n po exrsn FO 957 MA gt el vn 19 1 806 1 ZHINS L HA 29A 4n001 8 80 180 95 Zn DN ZAZ E 04H m pH 2 800 EA s T 50 28 SAL B LAGOV8XZd Am 9rd S zo ry UJ Azl6eu E lt Z HAsoyexz8 T Az 6eu E tt 5 y98 3400 0 2 25 981 _ doz 9 4 WrZ NW1 659 569 n 9 QJ 8 m3 1 Sg 1 9 80 sn 6 Pr vn 6 1 9027 2 vi gs 99 gR T T V i P P 142 N 2 ni m MU Ld i i exisn 28 7
29. 0 peroeuuoo 090 1 99A 9 Lo wx Wx zNyF paseuuos zgn 7 1010 27 88 JO Y 1 ved WLxXd WLS g 10 paloauuoo LSN z I d 13838 29 vn DR 1 1959 or HO 19801 3922 589 Bnqep s 19 209 z v0 EN i 889 T V1X3 909 55 40 op isn Aer our E ag z 0 opne zsn Aupo USO g 0502 vad gt jeu amp is xne 3c0cXVWN zc NECI 2 lt nove 8 0 Zad zz 90 xny er xy moi 9 85 Lad zsa 5 ME 27 459 oda 1 a 7 I 57 0950 xr XL 26258 1980 Hd yg Lleleq eldsiq f lolerakedsia z9 58 5 Ula se 9 g 1 90 20 44001 18 g lelereafeidsiq 170 leleweaferdsiq E ado 9 ___ 5 57269 149882 tela 1 rg ttlereaheldsig NS zi oe 199 lolereafeidsia d ddA vin 34001 60 305 ao 64 oa JeZzeseUdioloWN mog s erd 9 1 eJeds pejoeuuooun 99 o aM 325 e
30. 90 1sn py 92 bldreor SlAex 1nojede ss v Eld goi 19 214 7i 55 IV Hd 50 2 6094 08402 2 010 zs 10 014 Key nid 8g a eqouispeeujuud Std 914 s Br Eld tld n zey Jes 9018 Leqonspeeuluud pd 21 E wor OL MOL MOL MOL leues 669 Oldor ino jeues 244 gsd 945 qed L ld c 0197 5 Luis 39001 4000 E0001 40001 840001 449001 444001 24000 L 2 lt 90001 2 49001 444001 LOT 9107 SILO T ELIO LELO OLIO T 6015 T 20107 SOLO 9012 mM 99A ey ely Ly 01613 546 14106 6002 9120 1001 1u6uAdo5 ON SYN seiBojouuoe oipny pue sallddns
31. 5 2010 Z H Receiver Circuit Q3 Drain Umaxe 15 404 CHi1 5 861 Receiver Circuit Q2 Drain 288 Ans bu 188 a NEUE Frea 2 119MH 188 Ans CHi Receiver circuit L1Pinl Q3 gate _ 94 NUT CHi Receiver Circuit Q3 Source CHi 3 8 Receiver Circuit 02 Gate 164 Arnis aln 188 7 2 Receiver Circuit D3 Pin 3 At high sensitivity variation in DC level can be observed when stroking transducer Receiver Circuit Ul pin 3 Stroking Transducer 1 1 Receiver Circuit Ul Pin 6 Stroking Transducer Receiver Circuit Ul pin 2 Stroking Transducer 188 Ans 2 Receiver Circuit UI Pin 1 Stroking Transducer II 1 Receiver Circuit Ul Pin 5 Stroking Transducer in LL Tr 1111 11111111 11111 1 51515 Receiver Circuit Receiver Circuit Ul Pin 7 Ul Pin 9 Stroking Transducer Stroking transducer but viewing very little response
32. 987809 00 CHA gs J 83 8 4 9 5 v 8 2 S jo 6 19945 L INOLEIJ eUN DIN 549 924 saleM uinos 6002 2 1984 ON SYN a eoepeijui pue Jeluud Selbojouyse Gr019Hr 70190 Due Y ti El 10 881 00 E aa 00 010 erg NO3 anss OL TES sif Gr019Hr
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34. 1725 Pins 10 amp 7 Image captured whilst stroking 051 amp 052 transducers simultaneously st 5 zt f 1 a MSS CHiz 160ml 188 CH i 28 024 3 024 5 Image captured whilst stroking 051 transducer Use with 752 Image captured whilst stroking US1 transducer Use with transducer will result in an equivalent signal 1052 transducer will result in an equivalent signal i ZB U32 Pin 13 032 Pin 14 Image captured whilst stroking US1 transducer Use with Image captured whilst stroking US1 transducer Use with 1052 transducer will result in an equivalent signal 1052 transducer will result in an equivalent signal CH1 EN U27Pin9 DC level with super imposed audio signal Audio signal level very low SENED 17 fl CHi 18 8l U27 Pin 9 DC level with superimposed audio signal Audio signal very low zoomed in image of audio signal T U27 Pin 6 DC level with superimposed audio signal Audio signal of audible amplitude Ultrasound Technologies Service Engineer Guide Document contains information of signals at key points throughout the specified product Fetatrack 310 The following images are oscilloscope snap shots of signals acquired from the Fetatrack 310 main PCB and correspond to the Fetatrack 310 Ultrasound 1 Circuit diagr
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36. T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description Microprocessor Circuit The microprocessor circuit is arranged around MC68HC812 U8 a fast second generation central processing unit CPU When power is applied to the circuit a monitor circuit waits for the power rail to become stable and then 100 ms later takes the reset on the CPU high logic 1 to 5 v This starts the CPU working by reading the bytes at the very top of its memory map from the EPROM ROM U9 This shows the CPU the start position in ROM from which to start executing This sets up all the peripheral devices which includes an interrupt timer starts the system clock which consists of interrupts from the cpu to the watchdog ic at the rate of 1 every millisecond As all functions are time dependant nothing starts without this clock The CPU now reads all the preset variables from the battery protected RAM within the real time clock U13 The battery source is a lithium 3 6 v cell B1 with a nominal life of 10 years After the CPU has loaded the variables it rums a system check for any internal problems which are reported on the system display Selection of the individual devices is controlled by cpu internal the chip select circuits Most analogue signals eventually require digital signal processing for display chart recording or digital transmission the signals are presented
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39. 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 This symbol on the product its packaging indicates that this product must not be disposed pum As a producer of electronic devices Ultrasound Technologies will provide for the financing of the treatment and recycling of waste returned through these designated collection points in accordance with local requirements Instructions for Disposal
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43. Fetatrack310 Service Manual Issue3 FETATRACK 310 Twin Fetus Monitor US1 Monitoring Transducer US2 Monitoring Transducer External Toco Transducer Patient Event Marker Belt and Buckle set x3 Chart pack x1 Power Cord Operating instructions Coupling gel 0 25ltr Page 1 O 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 Special Precautions Your FETATRACK 310 Antenatal Cardiotocograph has been designed for electrical safety All the safety and operating instructions should be read before operating the FETATRACK 310 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 chassis 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
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45. Power en 5 5 Remote Patient Event Marker 5 PODE COMME CUO Ml Mmm 5 User l ie se M 6 8 Ultrasound Fetal Moniioring LLULLU uu uuu L 9 Uterine Activity Monitoring 10 r elal ACiN ily uu u EA 10 ira 11 x En 12 25 ee 12 TROUBLESHOOTING 13 No Display Information on 13 Keyboard Does Not Respongd pp 13 Sound From Loudspeakers i 13 No FHR Information on Display or 13 NT 13 MAINTENANG OO 14 GO S 14 CONN 14 ME TANS UNG m T 14 SPECIFICATION c H 15 ENVIRONMENTAL EM 16 Electrommagnetic uU LLULLU 17 WEEE ROSS 18 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Contents
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47. 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 310 main assembly Fetatrack 310 recorder interface PCB Fetatrack 310 main PCB Fetatrack 310 Ultrasound 1 Transducer Fetatrack 310 Toco Transducer Fetatrack 310 Ultrasound 2 Transducer Circuit Data Control PCB Placement Diagram Ultrasound 1 Circuit Ultrasound 2 Circuit Digital Printer Control and user interface Circuit Power Supplies and Audio Circuit Toco Circuit Front panel PCB Placement Diagram Frontpanel Circuit Assembly Drawings Fetatrack 310 Recorder Interface board connector Detail Fetatrack 310 24V power lead Fetatrack 310 Display module back light wiring Fetatrack 310 Transformer wiring Fetatrack 310 Speaker wiring Fetatrack 310 Event marker input wiring Fetatrack 310 US2 cable wiring Fetatrack 310 US1 cable wiring Fetatrack 310 Toco Input Socket Fetatrack 310 US2 Input Socket Fetatrack 310 US1 Input Socket Fetatrack 310 Toco cable wiring Fetatrack310 Service Manual Issue3 Page 27 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk 2 10 9155 Asse 016 19 9002 u OTE 49219990
48. is to be made to a personal computer Remote Event Marker Connection of an external event mark switch allows the patient to indicate events by printing an arrow in the gap between the FHR and UA traces The maximum voltage that can be applied to this output is 15VDC Probe Connections US1 US2 Toco This is for the connection of approved Doppler and Toco transducers The maximum voltage that can be applied to this output is 15VDC Fetatrack310 Service Manual Issue3 Page 5 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures Operating the FETATRACK 310 In this section information is supplied which will help you use the FETATRACK 310 for the fist time User Configuration Firstly connect the AC supply cord Itis necessary to set the operation of the FETATRACK 310 to meet your requirements Before turning the FETATRACK 310 on press and hold down the Toco Zero button Then whilst keeping the Toco Zero button pressed down turn the FETATHACK 310 on by flicking the AC input on off switch which is located on the rear of the unit as part of the AC line input socket When the unit is on the front panel LED will be illuminated The FETATRACK 310 starts and then enters its User Configuration Mode release the Toco Zero button as soon as Calibr
49. z fold thermal paper using a thermal array print head Fetal heart rate uterine activity and fetal movement recorded together with date time recorder speed operating mode and alarm status The printer also prints a header block each time the printer is turned on that contains Time and Date Patient Name Gestational Age Patient or Bed Number Hospital or Doctor along with a print viability test bar that prints to all dots of the printhead To load the printer with paper open the printer door by pulling the recorder door using the opening provided on the printer It will then release and opens downwards exposing the printer paper tray Remove the new paper pack from its protective plastic cover and insert the pack into the recorder so that the printed side of the paper is uppermost and the FHR trace is on the left Pull the paper out of the front of the unit making sure it is positioned parallel to the roller and the close the door The pack will self align when the recorder is run To operate the printer press the Recorder On Off button The printer will start to run and the chart speed will be shown in the LCD display To turn the printer off press and hold the Recorder On Off button until the printer stops This only operates after the data block has been printed A small amount of paper will be fed out at high speed The printer will record at 1 2 or 3 cm min To change the speed during recording simply press the Recorder On
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51. 291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures Alarms The Fetatrack 310 has built in Bradycardia and Tachycardia alarms These can be set On or Off in the setup program The status of the alarms are printed in the center of trace between the UA and FHR traces When an alarm is activated a down arrow with an A is printed at the top of the trace and an audio alarm sounds Pressing either volume up or down can reset the alarm When set to Level the Fetatrack 310 monitors the average of the last 30 sec of Heart Rate data and alarms if this falls below the selected numeric value When set to Complex the Fetatrack 310 monitors the last 3 time periods of 20 sec each of Heart Rate data and alarms if the fall below the selected numeric value and are ina descending rate for Bradycardia or ascending for Tachycardia Paper Out will sound a short alarm to draw attention to the monitor if the paper out store reaches 90 full the Alarm will sound again until cancelled by the user pressing either volume up or volume down Fetatrack310 Service Manual Issue3 Page 11 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures Transducer Belts Both the ultrasoun
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57. Ltd About This Manual This booklet explains the operation and service of the FETATRACK 310 Antenatal Cardiotocograph 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 1990 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 Fax 44 0 1291 425425 44 0 1291 427093 EMAIL service doppler co uk This service manual contains circuit descriptions diagrams parts and spares lists for the FETATRACK 310 maintain the FETATRACK 3105 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 310 is supplied complete with the following FETATRACK 310 Single Fetus Monitor US1 Monitoring Transducer External Toco Transducer Patient Event Marker Belt and Buckle set x2 Chart pack x1 Power Cord Operating instructions Coupling gel 0 25ltr
58. Off button momentarily The FETATRACK 310 can be run at the speed of your choice and will always start at this pre programmed speed every time the printer is turned on For details of how to change the pre programmed speed refer to User Configuration When the paper pack runs out the Fetatrack 310 will sound a short alarm and display Paper For the next 30 min the system will store HR1 HR2 and Toco until either the store becomes full the user presses and holds the Recorder On Off button to reset the store and loose the stored data or the user inserts a new paper pack presses Recorder On Off button once and the Fetatrack 310 prints the stored data and returns to normal printing When the store reaches 90 full the Fetatrack 310 will Alarm and show StoreLow if the store then becomes full the display changes to StoreFull and there will be no further storage The data can still be printed by pressing Recorder On Off button once or reset by pressing and holding the Recorder On Off button The print from store is lighter than the normal trace to distinguish stored data Fetatrack310 Service Manual Issue3 Page 8 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures Ultrasound Fetal Monitoring The FETATRACK 310 ultrasound transduce
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62. Ultrasound Technologies Ltd Fetatrack 310 Service Manual Issue 3 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Contents ABOUT THIS MANUAL nnmnnn ennnen nnna 1 SAFETY IN USOES n R 2 Special PRECAUTIONS 0 E 2 Electricor Shock Hazard uuu uu RPM EDI 2 EXDIGSION ee ee oe oo Oa T 2 Handling the Delicate Transducers J 3 818 USEE ac uuu uuu esac 3 PARTS AND THEIR FUNCTIONS J J T l its JJ 1 toca 4 FT310 Front Panel Controls U eaa nasa n snas aaa 4 REGoroerom oO CC 4 EVEN 4 4 ide DOW 4 US2 11 61025 u A AEiG 4 Ge 4 Indicators and Connecighs sn 5
63. am This document also applies to the two Ul trasound circuits The service engineer should allow for signal differences on the transmit side of the circuit as 051 amp US2 transmit signals of different frequencies and amplitude Note images of digital signals that are directly linked to the microprocessor can be found on the oscillo scope image document related to the Fetatrack 310 digital central processor diagram Transmitter circuit Transmitter circuit U16 pin 3 016 pin 1 15 supply rail 10 Vrf1 Supply rail Transmitter circuit Transmitter circuit Q4 Drain pin 1 Q4 Source 2 1 1 2810 146 4 Frea 2 092MH 19 484 18 599 2 118 CHi 1 880 288 Bns 258MSa s CHi 5 B88U 200 Gns Transmitter circuit Transmitter circuit 01 Base Pin 2 01 Collector Pin 2 CHi 3 60607 Transmitter circuit Transmitter circuit Q1 Emitter Pin 2 L2 Pin 1 Vrf1 10V Supply rail 32 80U 9 248 Fres 2 119MMs _ Umax 5 921 118 800 2 1 1 H BU 1515 Ans Sa 2 BAU 188 Transmitter circuit Transmitter circuit L2 Pin 3 L2 Pin 4 Transmit signal USTx1 2 1Mhz for USI 1 8Mhz for US2 i ZB Receiver Circuit LI Pn4 RxSigl
64. arm on or off The Tachycardia Alarm is triggered when the system detects a Tachycardia above a preset value that the user can choose The Alarm can be a level alarm or one calculated from a complex Press the Volume Up button to change the setting The alarm is tone is silenced by pressing the units Volume button When the Tachycardia Alarm is set to your requirements press the Toco Zero button once You are then prompted to select the Bardycardia Alarm on or off The Bradycardia Alarm is triggered when the system detects a Bradycardia below a preset value that the user can choose The Alarm can be a level alarm or one calculated from a complex Press the Volume Up button to change the setting The alarm is tone is silenced by pressing the units Volume button When the Bradycardia Alarm is set to your requirements press the Zero button once The FETATRACK 310 will then restart and operate according to your settings The FETATRACK 310 is now operational and the LCD screen will show US1 us2 if the unit is only a single fetus monitor it will only display US1 and a Toco value Fetatrack310 Service Manual Issue3 Page 7 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures The Printer The FETATRACK 310 prints on preprinted
65. asound Technologies Ltd Operating Procedures You are then prompted to enter the Toco Filter Value This sets the filtering within the monitor to produce a smoother Toco trace if required The filter can remove some of the maternal breathing artifact It is set by pressing the Volume Up button for a value soothing value between 1sec and 2sec When the correct filter value is displayed press the Toco Zero button once You are then prompted to enter the Toco Range This sets the response of the Toco transducer to either a full scale of 100 or 200 on the chart print out It is set by pressing the Volume Up button for a value between 100 and 200 When the correct range is displayed press the Toco Zero button once You are then prompted to enter the Chart recorder speed This sets the initial turn on speed of the chart recorder Then once the chart is running the speed can be further changed to 1 2 or 3 cm min It is set by pressing the Volume Up button for a value of 1 2 or 3 cm min When the correct speed is displayed press the Toco Zero button once You are then prompted to select the Data Block on or off The Data Block is printed at the start of each recording this function can be disabled by setting Data Block to off It changes from on to off and back again by pressing the Volume Up button When the Data Block is set to your requirements press the Toco Zero button once You are then prompted to select the Tachycardia Al
66. ate System is displayed You are then prompted to enter the date if different to that displayed To change the day and month press the Volume Up button One press advances the day by one pressing the Volume Up button for longer advances the day by 10 To change the year press the Volume Down button One press advances the year by one pressing the Volume Down button for longer advances the year by 10 When the correct date is displayed press the Toco Zero button once You are then prompted to enter the time if different to that displayed This works in a similar manner to the date with the Volume Up button advancing the hours and the Volume Down button advancing the minutes When the correct time is displayed press the Toco Zero button once You are then prompted to enter the Toco Base Line offset This sets an artificial zero line for the toco transducer above zero it can be set by pressing the Volume Up or Volume Down buttons for a value between 0 20 After setting this value the Toco will be set to this every time the Toco Zero switch is pressed and allows small negative Toco excursions to be seen on the chart When the chosen zero offset is displayed press the Toco Zero button once Fetatrack310 Service Manual Issue3 Page 6 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultr
67. 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 1 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 No sound from loudspeaker Verify the system is on and that the fuses are intact Check volume control is set high Check that the correct transducer has been selected Check connection of the transducer No FHR information on display or FH trace printed on recorder Check that the correct transducer has been selected and connected to the patient Check connection of the transducer Check for audio FH complex and reposition transducer until clearly heard No chart printed Verify the system is on and that the fuses are intact Check that the recorder is turned on Check paper is inserted into the recorder correctly Check recorder door is correctly closed Check that paper moves out of the recorder at the correct rate Fetatrack310 Service Manual Issue3 Page 13 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 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 re
68. commended 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 Clean 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 or isopropyl alcohol 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 or isopropyl alcohol to clean the transducer and cable Remove all traces of the detergent or alcohol 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 Fetatrack310 Service Manual Issue3 Page 14 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co u
69. d heart In the absence of signals of adequate quality this indicator will be permanently off The audio volume can be increased by pressing the volume up button marked with the up arrow Conversely to decrease audio volume press the button marked with the down arrow In twins mode the audio output is selected for either channel by pressing the US 1 2 button The selected channel is indicated on the LCD display by the capital US letters Once clear fetal heart signal has been located set the volume to the desired level using these controls Transducer position should be checked at least half hourly during labour monitoring or prolonged NST When repositioning the transducer further coupling gel may be required When repositioning the transducers always ensure that the fetal pulse indicates the optimum signal conditions Results will vary from one patient to another but in all cases good transducer positioning is essential and this may be aided by the use of a liberal amount of coupling gel With the fetus in the vertex presentation and the mother sitting or supine the clearest sound will normally be found on the midline below the umbilicus In the lateral position clearer sounds may be found with the transducer displaced from the centre line to the upper surface of the abdomen The clearest signals in breach presentation may be located higher and to one side Fetatrack310 Service Manual Issue3 Page 9 Ultrasound Technologies Ltd L
70. d and contractions transducers are held in position with elastic belting which maintains the active elements in contact with the abdomen The belts should first be placed around the patient and held in place at the correct tension with the plastic buckles As the transducers are free to slide on the belt final positioning can be easily achieved Similarly repositioning of the transducers is made very much simpler 1 Attach the buckle to the belt using the velcro fastening 2 Place the belt around is the patient pass the free _ end into the buckle adjust 2 to correct tension and N NA E A close to lock belt in position p N gt E N N 28 di LN ia 3 4 g N P p 5 se N J 2 2 j 3 The tranducers can be easily slid around the belt to best position Interpretation The following is intended only as a brief guide For a fuller explanation of the interpretation of chart records refer to suitable reference books During the antepartum period the Non Stress Test NST is an accurate means of predicting fetal well being The criteria proposed by Schifrin et al for the interpretation of the NST is summarised Reactive accelerations of 15 BPM or more which last for 15 seconds or longer twice in any 10 minute period These may be accompanied by fetal activity Non reactive evidence of fetal movement during a forty minute period but without the react
71. e Volume Up This button is used to increase the audio volume level or in configuration mode to change user options Volume Down This button is used to decrease the audio volume level or in configuration mode to change user operations US1 US1 Transducer Select in Twins mode Pressing this button changes the selected probe from US1 to US2 for volume output This is used when the unit is in twins mode with two US channels for listening to either of the two fetuses Press and hold to activate twins trace offset Toco Zero This button zeros the Toco trace to the selected baseline Fetatrack310 Service Manual Issue3 Page4 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Parts and Their Functions Inputs Outputs and Displays Power On Indication The green LED associated with the above symbol indicates that power 1 connected to the apparatus when illuminated 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
72. ent the ingress of fluids NO coupling gel is required for this transducer to operate correctly Place the transducer on the centre line over the fundus in a position where the uterus is firm and secure in place with the stretch belting Attach belt in the same fashion as with the ultrasound transducer Once the transducer is in position push the Toco Zero button on the front panel to zero the recording The position of the zero baseline can set to suit individual preferences For details of how to change the pre programmed baseline refer to User Configuration Fetal Activity Fetal activity may be recorded with the assistance of the patient A hand held marker switch is provided for this purpose and this is plugged into the socket immediately to the right of the UA input on the front of the unit If the patient feels movement of the fetus she may press the switch and this will mark the paper with an arrow the gap between the HR and UA traces Alternatively this marker may be used by the midwife to indicate any changes made during the procedure such as repositioning of the transducers or movement of the patient A front panel event marker is also provided and this marks the trace on the top edge of the HR scale This can be used where two types of indication are required Fetatrack310 Service Manual Issue3 Page 10 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1
73. esent 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 Open the recorder door and then carefully lift the lid upwards The Top Cover can now be removed taking care to disconnect the earth bonding cable connecting the lid to the base and carefully disconnecting the front panel pcb interface cables The recorder and display module can be removed from the lid by careful removal of the 2 screws holding the parts in place Be careful not to loose the spacers lying behind these cards Internal Layout With the top cover removed and the front panel facing you there is one large printed circuit board fixed to the base of the monitor this contains all the power supply circuits all the control circuits and the Ultrasound Toco and digital signal processing circuits In addition there is the Front panel displays keyboard interface and printer drive circuits card mounted on the Lid of the unit Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description Power supply Circuit The 240 110 VAC supply enters the FETATRACK 310 via an IEC double fused inlet mains filter and switch and is fed to a torroidal transformer The input supply voltage is
74. gh current microstep interface The data is again passed to the Display and Recorder interface board via ribbon cables J6 and J7 after first being processed by microstep controller U23 The signals generated are turned in to phase data by driver U2 on the interface board before energising the coils of the motor J4 Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description Display The microprocessor calculated rate value is passed as parallel bit values to the display module connected to the Display and Recorder interface board The display phase can be adjusred by VH1 to allow for a better viewing angle Data Storage Chart data is stored within the RAM U22 when the paper pack runs out A reflective opto sensor on the recorder module instructs the microprocessor when paper is out and the system will the buffer the data for 20 mins Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 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 310 is operating within
75. iated with power on indicator Type B Equipment Unit classification On power connection to the mains Attention consult accompanying documents Associated with auxiliary connections see O Off power disconnection from the mains operating instructions N This symbol on the product or on its packaging indicates that this product must not be disposed of with your normal waste Fetatrack310 Service Manual Issue3 Page 3 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Parts and Their Functions FETATRACK 310 Front Panel Controls The front panel control area contains 6 buttons used to control the operation of the unit they are all indicated by icons to aid language variations Event Mark 1 Places arrow in upper portion of Volume Down chart Volume Up Toco Zero Sets Toco channel to preset baseline value Recorder On Select ultrasound channel Off and speed for audio output in twins control mode Recorder On Off and Speed Change This button is used to control the operation of the recorder Press once and the chart recorder will start each consecutive short press will change the speed Pressing and holding the button down will stop the recording Event Mark 1 Places an event mark arrow at the top of the scal
76. ivity indicated above Unsatisfactory recording quality too poor to determine the above criteria Stimulation of the fetus or repositioning of the transducers may result in an improved recording Results from the NST may indicate the requirements to perform other diagnostic checks such as the Contractions Stress Test CST Fetatrack310 Service Manual Issue3 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 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
77. ject signals below 150Hz and above 330Hz and the output is taken do a digital AGC U3 The amplitude stabilised signal is then amplified and full wave rectified by U2 This full wave rectified signal is then buffered and smoothed by an active filter The smoothing is achieved by the low pass active filter having a at 5Hz hence giving the average value or power envelope of the audio complex This signal is then passed to the A D converter stage of the cpu U8 for further digital signal processing Ultrasound Channel 2 Ultrasound 2 is identical in operation to Ultrasound Channel 1 with only a change in component references Toco Circuit stabilised 5V is fed to the toco transducer along with OV which form the excitation of a Whetstone bridge in the transducer The Differential output of the transducer is fed a high gain differential amplifier 026 to a low pass filter 032 for signal smoothing into the A D converter 011 further digital signal processing U8 Toco Zero is automatically adjusted by D A converter U31 providing an offset voltage into the input of U32 Overall gain is adjusted by VR2 Event Marker The fetatrack 310 is supplied with a hand held event marker This is a switch wich when pressed connects an input on the microprocessor U8 to OV via resistors 110 and R106 Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom
78. k W www doppler co uk Ultrasound Frequency Transducer Audio Response Range Power Output Signal Processing Indicators Toco Transducer Response Scale Indicators Event Mark Hand held Unit Front Panel Alarms Bradycardia Tachycardia Paper Out Data Presentation Ultrasound Technologies Ltd Specification 1 5 or 2 1 and 1 8 MHz continuous wave Multi element wide angle 300 1 KHz 50 210 bom 5 mW sq max SATA Software AUTOCORRELATOR LCD heart rate and pulse indication Differential external pressure transducer 0 5Hz 0 100 LCD Toco numeric level indication User operated User operated Complex and Level alarms Complex and Level alarms Short Alarm Strip chart recorder and alphanumeric display module Printhead Resolution Speeds Speed accuracy Paper Paper type Paper out storage Display Controls Indicators Fetatrack310 Service Manual Issue3 4 inch thermal solid state printhead 8 dots mm 1 2 3 cm min Better than 196 Z fold Black thermal 30 mins 32 character by 2 line LCD display module 6 control buttons for Paper Start Stop Volume Up Volume Down 0 57 Toco Zero and Event Mark Green power on off Page 15 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Specification Power S
79. odge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Operating Procedures Transducer position which results in sounds with a strong placental or cord signal should be avoided as these frequently render traces with artifacts It is important that a distinct fetal heart sound is present during monitoring for correct function of the unit Any doubt about fetal variability should be checked by listening to the audible signal or by an alternative diagnostic technique A simple check of the ultrasonic system can be made by holding the transducer against the palm of the hand and stroking the back of the hand at a fixed rate for example twice per second A clear audible signal should be heard and the digital display should show a rate after approximately five seconds With the printer running this rate will be recorded on the chart In the event of HR1 and HR2 traces overlapping or having similar rates the HR2 US2 trace can be offset by 20bpm by pressing and holding the 057 key This is reset when the recording session finishes Uterine Activity Monitoring The Toco transducer is used to monitor uterine activity The transducer plug is colour coded grey for ease of identification monitor uterine activity plug the Toco transducer into the grey UA input socket The Toco transducer is sealed to prev
80. 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 10096 of our entire manufacturing process and parts meet the RoHS directive and we are therefore fully compliant Fetatrack310 Service Manual Issue3 Page 18 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Disassembly Dismantling Procedure Note Before disassembling the unit unplug the transducers accessories cable if pr
81. onant transformer L1 to the gate of Q3 the drain of this FET connects to the source of Q2 to form a tuned cascode amplifier with L3 From the drain of Q2 the amplitude complex of the received signal is detected by passing the signal through a detector diode D3 The raw low frequency heart complex is then amplified and filtered by U1 where its associated components form a bandpass filter amplifier with a bandwidth of 150Hz to 1KHz This signal is passed to the audio section and the signal pre processing Audio Amplifier The audio signal then passes to a input selector U25 where the user can select via the front panel which Ultrasound channel will pass to the audio circuits and then to digital gain control U24 and buffer amplifier U32 where the volume setting is determined by the microprocessor subject to the user setting From here the gain controlled signal is fed to the input of a monolithic power amplifier 027 and from here to the loudspeaker at J1 1 The power rail for U27 is provided by the unregulated 36V fed from D19 Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description Signal Pre processing The detected audio complex is fed to 05 a bandpass amplifier where the filter characteristics are arranged to re
82. 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 310 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 310 was shown to be susceptible to the following tests Effect was a displayed rate of 115 to Applied test signal is very high for high 125 bpm at each harmonic and sub sensitivity electronics and non applied Conductive Test applied a 3Vrms RF magnetic harmonic of the transducer frequency transducers With correctly applied disturbance induced field to transducer cables with a 2Hz No disturbance was detected at other transducers interference from in band by applied RF field modulation frequencies HF signals is unlikely Effect was a disturbance to the UA Normal operation is unaffected and the transducer causing a static UA static reading can be cancelled by Radiated RF Test applied 80Mz to 2 5GHz reading of up to 9 units pressing the toco zero button Normal mains power is unlikely to cause such a transient burst Displayed ra
83. prox 120 and correspond with the data being printed on the chart paper UA Toco Contractions 9 Connect the toco transducer to the grey UA input socket on the front panel and press UA zero to set the baseline baseline resets to value 1 20 as selected in set up procedure 10 Apply pressure onto the centre of transducer and check that the toco trace on chart recording increases to 100 10 Remove load and trace will return to baseline Fetatrack310 Service Manual Issue3 Page 25 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd e Performance Checks Event Marker 11 Connect the hand held remote event marker to the external mark socket Depress the button once and note that a half arrow is printed on the bottom of FHR recording Setting up the monitors The mode of operation of the monitor is programmable through the front panel to give a certain amount of customisation The programming mode is entered by pressing and holding UA Zero while turning the monitor ON Details of the user programmable options are at the beginning of this manual Fetatrack310 Service Manual Issue3 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www
84. r is used to detect and monitor the fetal heart beat The FETATRACK 310 can monitor twins and if this option is chosen it is supplied with two Ultrasound transducers The primary Ultrasound Transducer always supplied has a yellow coded plug while the twin channel has a blue coded plug Push the relevant plug firmly into is colour coded front panel US socket and turn the unit on Locate a clear fetal heart sound using a Doppler Fetal Heart Detector and secure the stretch belt in position so that it passes over the transducer site and clamp in place by fastening the buckle after feeding the belt through the transducer Apply gel to the surface of the transducer locating it approximately in the position determined by the Doppler detector Position the transducer to obtain the clearest fetal heart sound heart rate processor will start to calculate heart rate within a few seconds and the heart rate can be observed on the LCD display Correct operation can be verified by observing that the pulse lamp is flashing at the heart rate The heart shaped fetal pulse indicator is also used as signal quality indicator When positioning the transducer observe the indicator which should be solid under the best signal conditions If this indicator is only showing an outline heart then this is an indication that the signal quality is not optimum Improved recordings can be obtained by repositioning the transducer so that this indicator always shows a soli
85. 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 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 310 2 Turn monitor on The green front panel LED will illuminate 3 display will first show the system selftest followed by the software revision This indicates the instrument is switched on and awaiting inputs 4 Load chart paper to recorder for assistance see operating instructions ensure paper is correctly aligned 5 Depress printer on off and recorder will run at either 1 2 or 3 cm min dependent on the user preset value Ultrasound 6 Connect ultrasound transducer to the yellow or blue US sockets on the front panel and increase volume to maximum 7 Place transducer in palm of hand and gently stroke the back of the hand at a constant rate of about 2 times a second 8 Check audio volume is present digital display will display the simulated rate ap
86. stepped down to anominal 24 VAC and 1 then bridge rectified by D19 smoothed by C130 Regulated Supplies The voltage regulators U28 and U29 are fed from D19 at a voltage of around 36VDC These oscillate at approximately 120 KHz transferring pulses of current into 112 and 114 respectively output of inductor is fed back directly into U28 29 which at pin 1 is reference comparator and alters the pulses transferred into the inductor to obtain a stable voltage output The output of U28 is 5V DC and U29 is 12V DC Pulses of current in to inductor L14 are also taken into a charge pump to provide a stable 12V DC after regulator transistor Q14 D19 also supplies current to the printhead and motor drive circuits via Q13 and U30 which provides a stable 24V DC Printhead and Motor Drive Supply printhead requires pulses of current equalling 10A but for a very small amount of time therefore current is taken from the charge built up in C144 rather than expecting the power supply to supply the pulses 913 is connected as ON OFF switch to the printhead voltage circuits to act as protection An explanation of its operation can be found in section PRINTER INTERFACE When ON current is fed to U30 connected as a variable voltage regulator with a range of 18 v to 24 v where VR1 adjusts this voltage Print density is controlled by this voltage but it is recommended that this voltage should be no greater than 24Vdc Fetatrack310 Ser
87. te is Electrical fast Test applied 2 AC power was a reading of 198 BPM unlikely to occur when transducers transients and bursts 1KV Signal Cables connected to a patient Test applied 2KV 4Kv Unit should be used in a low static 8KV Air Discharge 2KV environment Displayed rate is unlikely Electro Static 4KV 6KV Contact Discharge to occur when transducers are Discharge Repetition Rate 1second Effect was a FHR reading of 58 BPM connected to a patient Test applied 0 5 1 Normal mains power is unlikely to cause 2KV AC power line to ground such a surge Displayed rate is unlikely 0 5 1KV 6KV AC power to occur when transducers are line to line Effect was a FHR reading of 58 BPM connected to a patient Fetatrack310 Service Manual Issue3 Page 17 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 E ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description 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 EU 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
88. to CPU where an internal 8 bit A D converter with an 8 way multiplexed input converts the signals to digital form The converter accepts unipolar signals 010 5 v The CPU interfaces with the display and keyboard circuit using on chip peripheral interface as well as detecting selection of ultrasound and the presence of an Event keypress Printer Interface A proportion of the micro circuit is dedicated to printer interface and control the primary interface circuit contains timers serial drivers and peripheral drivers The principal of operation of the printhead and motor drive circuit is as follows Data is decoded by the software into bit positions within the allowable area of the printhead This data is then passed in serial form with a clock signal into the printheads serial buffer The data is latched by a pulse from the cpu via CMOS buffer this gives added protection in the case of device failure Data is then burnt onto the printhead by strobes 1 to 4 from the cpu which last less than 1 The data is passed to the Display and Recorder interface board via ribbon cables J6 and J7 Printhead data is buffered on the interface board by U1 before being passed directly to the printhead J1 Under normal conditions with the printer OFF there is no supply connected to the printhead or chart motor Only when printing is requested does the cpu turn on the 24VDC supply The cpu also drives the chart recorder stepper motor via the hi
89. 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 or gases as it could lead to explosion Fetatrack310 Service Manual Issue3 Page 2 Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd About This Manual 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 NEVER 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 310 and are in accordance with BS EN60601 1 1990 Where they are associated with the connection of external equipment that equipment must meet the relevant safety standards in all cases N Alternating current Assoc
90. upply AC input voltage 200 260 VAC or 100 130 VAC User selected Frequency 46 64 Hz Power 60VA Enclosure Material Aluminum Environmental Working temperature 10 to 40 C Relative humidity 30 to 75 Storage Transport temperature 10 C to 70 C Safety Unit Designed to BS EN60601 1 1990 Electrical Designation Class 1 Type B Computer interface Transfer 3 wire RS232 Data Rate 9600 baud Data Standard 8 bits no parity 1 stop bit Data Format UltraTec Comms Standard The following Consumables are available for use with the FETATRACK 310 Belt Buckle set 10 belts 2 Buckles per pack Chart pack 10 per pack 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 Fetatrack310 Service Manual Issue3 Page 16 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 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 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
91. vice Manual Issue3 Page 20 O Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot South Wales NP26 5PS United Kingdom T 44 0 1291 425425 44 0 1291 427093 ultratec doppler co uk W www doppler co uk Ultrasound Technologies Ltd Circuit Description Ultrasound Circuit Overview The ultrasound circuit is built up of four discrete sections These are Oscillator and Transmitter amplifier Receiver and Detector Audio amplifier Signal pre processing These operate to produce a continuous wave of 2MHz ultrasound which 1 passed to the transmitter 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 or passed via signal pre processing to the A D converter for rate calculation The circuit board has the option of two ultrasound circuits which operated at different frequencies the operation of each is identical as so only one is described here The current nominal frequencies are 2 1MHz 1 5MHz special order for US1 and 1 8MHz for US2 Oscillator and Transmitter output L4 forms an oscillator with Q4 and its associated capacitors producing a sine wave drive at the required frequency This is fed via a high current output driver Q1 and output transformer L2 Receiver and Detector The reflected Ultrasound signal is fed via a res

fetatrack 310 fetal monitor - Ultrasound Technologies Ltd.

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