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MBM-200 DELTATRAC II™ SERVICE MANUAL

Contents

1. 6 31 6 13 CPU Board Troubleshooting 6 34 6 14 CPU Board Parts Layout and Schematic Diagram 6 35 6 15 Video Controller Board Troubleshooting Chart 6 37 6 16 Video Controller Board Schematic Diagram Parts Layout and Timing Diagram 6 38 6 17 Power Supply Board Troubleshooting Chart 6 40 6 18 Switching Regulator Wave POLES aee eee ee e tb es 6 41 6 19 Power Entry Module Schematic Diagram and Power Supply Board Parts Lay umu 6 42 6 20 Power Supply Board Schematic Diagram 6 43 6 21 Mother Board Parts Layout and Schematic Diagram 6 45 6 22 Board Parts Layout cusan dotada eda ub 6 46 6 23 Keyboard Parts Layout ener 6 47 7 1 Adjustment Trimmer Locations sai m HU WE Dienste 7 3 VEN QURE EI AT 7 5 7 3 O Measuring Unit 7 10 8 1 Alcohol Burning Test in Room 8 2 8 2 Baseline Test in Room Air in Canopy 8 3 8 3 Baseline Test in Elevated Oxygen Level in Canopy Mode 8 4 8 4 Baseline Test in Elevated Oxygen Level in Respiratory Mode 8 5 9 1 Exploded View
2. on 12 voltage may be higher because of uneven loading March 156 1993 200 DELTATRAC SERVICE MANUAL 6 42 Figure 6 19 Power Entry Module Schematic Diagram and Power Supply Board Parts Layout APPLIANCE MAINS SWITCH INLET X1 Supply MEC Mains POWER SUPPLY 2 BOARD Connector M mug c lt 4F 880070 2 EB TE X17 Order code 88088 March 151 1993 200 DELTATRAC II SERVICE MANUAL 6 43 Figure 6 20 Power Supply Board Schematic Diagram 22 1 B 55 SN 29V 15 A7 2 3 L Tas 22 2 fa 100N x3 2 269 828 TAN i v32 7815 2 ____ 15976 5 L m 272 Los L x8 er 2 2U2 55v ALARM v3 8018 T _ m BUZZER CONNECTOR R24 es cO us POVER BOARU L c CH CG DATEX 62 9310 EKESTI T am WUT OS HP 38 880069 1 s 8 5 I 9 March Ist 1993 USE N ADAPTATION 79 NOT IN USE INFRARED LAuP Ses 5 22 lt M C02 MEAS UNIT 5 10 MOTHERBOARD 144948 T x cts i
3. 6 28 6 3 8 Valve Control Board Troubleshooting 6 28 6 3 9 CPU Board Troubleshooting 6 32 6 3 9 1 Instructions When Replacing the Software OECD 6 33 6 3 10 Video Controller Board Troubleshooting 6 36 6 3 11 Power Supply Board Troubleshooting 6 39 6 3 12 Mother Board Keyboard Troubleshooting 6 44 6 3 13 Video Display Module Troubleshooting 6 44 6 3 14 Hall Board Troubleshooting 6 44 AVS 7 1 71 Adjustments After Component Replacements 7 7 2 CO Measurement Adjustments ataca ka eae eh teas toda 7 2 7 3 Pressure Measurement Offset and Gain Adjustments 7 8 74 Oxygen Unit Adjustments UNDER ERREUR 7 9 Tov CPU Board au 7 12 7 6 Canopy Mode VO Baseline Adjustments 7 13 7 1 Flow Constant 7 15 FUNCTIONAL CHECK PROCEDURES 8 1 S 8 JSAPIDSOHEGCRK 8 1 PM USE
4. 02 8 24MHz clock CK 026 13 STR 026 15 RAS 026 77 026 15 LOAD 02666 N D26n6 CAS 026 4 2 po o _____ oo o j qs CONTROL BoaaCc TIMING DIAGRAM March 1st 1993 52 M C12 1 07 9 26 07 has d dis 2s Mens 03 5 __30 026 am 03 56 wm D2 02 927 01 b Di c27 um 09 1 5 5 EF 9367 aA b 1 Q camii gt 3 017 17 SV 1 29 9 F mar xi 3 3 27 8 361 3 5 X x MSL 5 02 DE 1 29 c32 32 7C HC166 R amp 32 MHC b VSYN 740 C6 0n 06 THEI SYN ak s 06 5V C3 Hor 2 2 14 p IM RIZ VIDEO eX 2 3 TLL 5 4 se ay 7 RI Tez Z ik 4758 85 FHC D6 Composite vt viden R4 8R1 al p 1 2 2 X2 1 2x2N3904 2 6 200 DELTATRAC SERVICE MANUAL 6 39 6 3 11 Power Supply Board Troubleshooting The troubleshooting chart in Figure 6 17 helps in pinpointing a malfunctioning component The only parts that require understanding of operating principles are the switching supplies Refer to the wave form diagram Figure 6 18 and the IC data sheet for more info on the LM 3524 switcher controller NOTE If FET V8 V11 is shorted it usually shorts the Trans
5. t m s Sago in B AB 1 3i In em Spe V 26 C02 zero EN 1 GND 8 600 oaa coo t 1 I l I I 1 Bo NO reo N30 rero 7h LET HD aut We Nb 14 04 dark 15 1 03 meas N20 T 12V DIRTY o 53 mei 17 oui 2 03 meas CO2 0 1 RIP 3 13 308 ap tet 520 p 12 03 ref N20 Ape XE D 7 meas N O PI d x 1 p 15 03 ref coz MENT r N Z Ind e ds a E 1306 306 LE 1 6 9 1 0728 42 3 7 8 10 P lt Boa ds st level and 26 move switch 51 R23 and RZ volues deperc c the hoard Hoard level 6 and below 1 823 and 24 50 15 D 13 2 n 10 5 1 356 evel S aed above Iwer Cl Bit and was 1505 or nese ievel 1 and tomer SELECTED INDIVIDUALLY CO was 0 22 tomia iever 75 and lower m gt 62 Pt a 200 DELTATRAC SERVICE MANUAL 6 27 6 3 6 1 Measuring Chamber Cleaning The sampling system is designed to prevent any moisture or liquid from entering the gas sensors
6. Check rear panel voltage setting before connecting the monitor to AC mains power Leave space behind the monitor to allow for proper ventilation OPERATING Before use allow five minutes for warm up and note any error messages or deviations from expected operation See the Operator s Manual for detail The diameter of the scavenging system tubing must be 2 to 3 times larger than that of sample out tubing to avoid changing the operating pressure within the monitor Inaccurate readings or internal damage may result Connect sampling line to the monitor prior to power up or reset to enable proper measurement of internal reference pressures CLEANING Do not use ammonia phenol acetone based cleaners These cleaners may damage the monitor surface Do not autoclave or gas sterilize the monitor Clean rear panel fan dust filter once a month or whenever necessary March 156 1993 200 DELTATRAC SERVICE MANUAL 2 4 SERVICING The tests and repairs outlined in this manual should only be attempted by trained personnel Unauthorized service may void warranty of the unit Servicing of this product in accordance with this service manual should never be undertaken in the absence of proper tools test equipment and the appropriate revision of this service manual Electrostatic discharge through the pc boards may damage the components Before replacing and repairing pc boards wear a static control
7. 200 DELTATRAC II SERVICE MANUAL 5 11 5 3 0 Measurement The oxygen measurement is based on the paramagnetic susceptibility which is a unique property of oxygen among all gases generally present in a breathing gas mixture The gas to be measured and the reference gas which usually is room air are conducted into a gap in an electromagnet with a strong magnetic field switched on and off at a frequency of approximately 110 Hz see Figure 5 5 An alternating differential pressure is generated between the sample and reference inputs due to forces acting to the oxygen molecules in a magnetic field gradient The pressure is measured with a sensitive differential transducer rectified with a synchronous detector and amplified to produce a DC voltage proportional to the oxygen partial pressure difference of the two gases CAUTION Due to the complicated and sensitive mechanical construction any service inside the sensor should not be attempted and therefore the detailed description of the circuitry and layout of the transducer is omitted from this manual ELECTROMAGNET MIXTURE OUT REFERENCE wi DIFFERENTIAL PRESSURE TRANSDUCER Pod SAMPLE IN Figure 55 Measurement Functional Principle March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 12 5 4 Valve Control Board The valve control board consists of several independent functions valve drivers watchdog circuit loudspeaker driver and power
8. M 37 832 AM 23 R12 A2 07 4 DAC LA 05 EFT 4 05 871 SETS 2 657 1 AS 3EN1 BA M 52 m 4 148 In M 2 02 278 15 a De H Yoo 52 44 DACS 14 c 85 A11 C42 A12 ix LF444 199 552 2 C17 TR 0 1 2 15V cst 18 A8 Ci4 E 16 2 1 REAL TIME CLOCK 3 Ar 87 m 9 5 x C44 552 C56 ts 647 L MET Troen Taon Tot aan 657 2 NIMI Eg 200 pp or 1 2 a stu CPU BOARD NNI CPU BOARD 200 2 2 N 0 yx S 8 0 INST RUMENTARIUM or FU are 8 38 88297 us INSTRUMENT AR TUM OY TARK M8 3B 882071 n 3 U TEEN s DEE Pr 22 ee p 8e 7 9 m gt ae gt 1 1 1 1 Li uw T z T T 200 DELTATRAC II SERVICE MANUAL 6 36 6 3 10 Video Controller Board Troubleshooting Before proceeding with the video controller board troubleshooting check the composite video output with an external video monitor 24 MHz bandwidth required to distinguish between faults in the controller board and faults in the CRT unit if the composite output gives a good picture the trouble possibly lies in the cables or in the C
9. 200 DELTATRAC IIM SERVICE MANUAL Doc No 882330 March Ist 1993 Datex Division of Instrumentarium Corp P O Box 446 FIN 00101 Helsinki Finland 358 0 39411 Fax 358 0 1463310 Telex 126252 datex fin MBM 200 DELTATRAC II SERVICE MANUAL 1 1 CONTENTS PAGE Ld Table ot Contes ses 1 1 PAETOS l I 0 rn 1 4 L i Sl T Os s 1 5 2 WARNINGS AND CAUTION S 2 1 3 INTRODUCTION AND APPLICABILITY OF THIS 3 1 3 1 Introduction and Applicability of This 3 1 Updates 3 2 3 3 3 3 3 3 2 Record of Manual Updates Carried 3 4 3A 3 5 4 GENERAL DESCRIPTION 4 1 4 1 AD Principle Oe OEO 4 3 43 General Block 4 5 Wa SL iL 4 7 AS Connector 4 8 5 DETAILED DESCRIPTION OF MODULES 5 1 51 Sampling System ________ 5 1 52 Principle of CO Measurement us 5 4 AME GS 5 4 2522 SPHODOIUC O 5 6 5 8 5 2 4 Measuring Board 5 9 53 O Mea SUE men
10. M arch 1st 1993 6 3 2 Error Messages MESSAGE 200 DELTATRAC SERVICE MANUAL 6 6 POSSIBLE CAUSE REMEDY EXTERNAL RAM FAILED ROM CHECKSUM ERROR ADC OR DAC FAILED EEPROM FAILED REAL TIME FAILED RECALIBRATE ALL FUNCTIONS PRESSURE ERROR TEMPERATURE ERROR GAS FLOW ERROR OCCLUSION OPEN GAS CIRCUIT BASELINE ERROR Check CPU board RAM read write problem Check CPU board EPROM read error Check CPU board problem in ADC DAC or analog multiplexers or resistor network R5 missing Check valve control board unable to read selftest voltage back to CPU board Check CPU board EEPROM failure Check CPU board real time clock failure check battery Recalibrate gases pressure and flow Turn power OFF ON and if message appears again check CPU Turn power OFF ON If error reappears check pressure transducer on CO measuring board and sampling system Check valve control board Check temperature sensor at flow generator exhaust tube Check sampling system Sampling line blocked Replace it If message reappears check sampling system Check sampling system Sampling line or water trap container not attached properly or missing Unsuccessful zeroing Turn power OFF ON and if the message reappears check gas measuring system M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 6 7 CHECK FLOW Flow selector wheel is loose or not in correct posit
11. signal is corrected for the effect of the background oxygen level This correction is not used in the Diagnostic mode This means that even if the monitor is properly calibrated the gain appears to be too small if a gas sample with and a high oxygen concentration is injected to the CO measuring unit March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 14 Figure 6 2 Diagnostic Mode Sample Sources CALIBRATION MIXING CHAMBER GAS FLOW GENERATOR FLOW gt SELECTOR Oust WHEEL FILTER PRESSURE TRANSDUCER CONSTRICTION CASSETTE 9 THREE WAY VALVE 0 NON ENERGIZEO 1 ENERGIZED CHECK 1 PRESSURE TRANSDUCER CHECK 3 CALIBRATION MIXING CHAMBER PRESSURE TRANSDUCER CHECK 2 PRESSURE TRANSDUCER CHECK 4 March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 15 6 3 5 Sampling System Troubleshooting Problems in the sampling system may be related to the magnetic valves malfunction leakage blocked or stuck or the tubing partial or total leakage or blockage In case of problems with the sampling system follow the troubleshooting chart in Figure 6 3 The schematic diagram and parts layout of the sampling system is shown in Figure 6 6 The measuring sequences of the two modes of operation canopy supplementary oxygen and respirator modes are described in Figures 6 4 and 6 5 and in the corresponding Tables 6 1 and 6 2
12. February 1st 1994 1 200 DELTATRAC I SERVICE MANUAL 6 16 Figure 6 3 Sampling System Troubleshooting Chart GAS CALIB UNSUCCESSFUL IS CAL GAS CAN EMPTY N IS AUTO CHOSEN CHECK IN GAS SETUP MENU VALVE CONTROL BOARD N CAL GAS CAN VALVE CHOOSE AUTO OR FEED EXT CAL GAS N TEST G SECT CHECK AND 8 8 PASSED STOP LEAKAGE Y TEST A SECT N PRESSURE Y GAS 8 1 PASSED MEAS OK RESPONSE OK Y N N CHECK PRESS CHECK SAM MEASUREMENT PLING TUBES TEST SECT TOTAL SAMPLE N LOCAL FLOWS 8 6 OK FLOW TOO SMALL OUT OF RANGE CHECK LOCAL SAMPLING PUMP SAMPLING TUBE 7 TESTE SECT CO2 BASELINE Y 02 BASELINE Y 8 5 OUT RANGE SENALHESOR he Y Y N N CALIBRATE Y CHECK LOCAL CALIBRATE Y HECK LOCAL GASES OK 4 SAMPLING TUBES OK SAMPLING TUBES PERFORM TEST CHECK CHECK B SECT 8 2 CO2 ABSORBER 02 MEASUREMENT CO2 MEASUREMENT LOCAL SAMP TUBES Y2 VALUES OK N CHECK MIX CHAMBER SAMPLE LINE PERFORM TEST B SECT 8 2 MBM 200 DELTATRAC II SERVICE MANUAL 6 17 Figure 64 Canopy Mode Measuring Sequence supplementary oxygen 6 6 06 0 CO2 a e W eus 00000000000 6000000 6 1 Sample Sources at Different Phases of Mode Measurement PHASE SAMPLE SOURCE ENERGIZED VALVES 2 measurement CO from flo
13. Y ory 4 on PT ELE v v w 2y Eur vs 2 blo v7 REAR VIEW Y March 151 1993 200 DELTATRAC SERVICE MANUAL 4 8 4 5 Connector Configurations Rear panel video out connector BNC connector Composite video signal 1 Vpp 75 Ohm 24 MHz bandwidth Rear panel D connectors See Tables 4 1 and 4 1b Table 41 Rear Panel D connectors Serial Analog I O Shield ground TXD RS232 RXD ia RTS CTS PB4 TTL do not connect Signal ground PB3 TTL not used 12 VDC 50 mA max 12 50 mA max 15 VDC 100 mA max 15 VDC 100 mA max ADC6 control board mux IO 100 O 5 VDC 500 mA max selftest DAC7 alarm frequency DAC6 ADC2 not used 10 V 10 DAC2 10V 10 26 VDC 1 A ADC not used 26 VDC 1 A max 22 VAC 1 A max 22 VAC 1 A max NO 1 ON tun coo 10 12 14 15 16 17 18 19 20 WN gt HMO gt 5 NOTE The maximum current ratings for supply voltage outputs pins 9 through 12 15 21 and 23 through 25 are for the total of both serial analog VO and AUX VO March 156 1993 200 DELTATRAC SERVICE MANUAL 4 9 Table 4 1b Rear Panel D connectors AUX VO Pin No VO I Signal Shield ground 2 TXD1 RS232 3
14. ET r 20 5 11 54 Valve Control Boarder 5 12 oy Ver UCB 5 15 obo Video 5 17 57 Power Supply and ie 5 19 5 8 Mother Board Keyboard 5 20 59 Video Display Module 5 20 310 Auto Cahbrabon vr E 5 20 311 Flow Selector Module us 5 20 March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 1 2 SERVICE AND 6 1 61 General Service 6 1 6 2 Disassembly and Reassembly eese nenne 6 2 6 3 6 3 6 3 1 Monitor Start up Sequence 2 1 6 3 6 3 2 Error Messages 6 6 6 3 3 General Troubleshooting Chart 6 8 6 3 4 Diagnostic Mode NE TE S SE 6 10 6 3 5 Sampling System Troubleshooting eene 6 15 6 3 5 1 Sampling System Parts 6 19 6 3 6 Measurement Troubleshooting 6 22 6 3 6 1 Measuring Chamber Cleaning 6 27 637 0 Measurement Troubleshooting
15. The timing electronics consists of a pulse shaping circuit consisting of three sections of 8 and logic circuits D3 to D7 See the timing diagram in Figure 6 9 The phase locked loop D6 gives an output frequency which equals the signal frequency multiplied by 40 This output is divided by counters D7 and D5 to reconstruct the original frequency From the outputs of these counters the control pulses for the synchronous rectifiers are decoded with the multiplexers D3 and D4 CO measuring electronics The signal from preamplifier 15 fed to the measuring board through X2 pin 5 It is first amplified by A4 one half of which 15 used for the CO automatic gain control From this IC output samples of the dark phase are taken by an analog switch 1 4 DI to capacitor The dark level is subtracted from the original signal with a differential amplifier 1 4 A2 R4 to R7 so that at the output of this amplifier the dark level is at ground potential Another analog switch takes samples of the CO reference level to CIO This voltage is compared to a preset voltage by 1 4 A2 and the output of this amplifier is used to control the gain of A4 so that the reference voltage is kept equal to the preset voltage The preset voltage is initially supplied by V2 To compensate for effects of temperature on the CO measurement a temperature dependent voltage from the photometer is connected to the summing point at A2 input 10 to affect the preset v
16. ex IREZ28 5 li RI ALARM DACS c 4 oes To RB 813 R14 ECG TEST 13x92 438 6501 155 Ret 2 CONNECTOR 1 am 12 M Sa 1 cn 144148 9 35 vt 5 iis RESET t 3x91 LI ans CIRCUIT i zvat P w TD ve 412 MR T i SERTAL ANALOG 1 0 p tu385 1 2 5 0 CR 41 2 512 10 09 BRICHINISS SY come vingc CHOD o 415 8 54 tk Hr I vidio CNO Dig I POWER BOARD 273 erar rage _____ D 1 536 15 PAS 1 0 gt PAY ALARM x Pel RT I 17 020 L MS 1488 r 13 Mou i n _ 11 14 id 15 lt JDE I POWER BOARD gt RN CC 58 880069 5 6 8 wSiRUMINTARIUM OF 200 DELTATRAC II SERVICE MANUAL 6 44 6 3 12 Mother Board Keyboard Troubleshooting Mother board schematic diagram and parts layout are shown in Figure 6 21 Troubleshooting of the mother board is limited to visual inspection of board surface and connectors continuity and short cir
17. After updating sign the record of updates in Section 33 2 No Page Change Date Cover Country code changed from sf to fin Feb 1 1994 3 5 Software upgraded to 2 level 6 1 DATEX TECHNICAL SERVICES simplified to Datex 6 15 Canopy room air is corrected to Canopy supplementary oxygen 6 17 Figure 6 4 caption corrected 6 18 Table 6 2 corrected February 156 1994 1 200 DELTATRAC SERVICE MANUAL 3 3 2 Record of Manual Updates Carried Out Update Carried out by Date number Name Datex February Ist 1994 2 3 4 February 156 1994 1 200 DELTATRAC SERVICE MANUAL 3 5 3 4 Software Changes The software code six numbers and revision number if other than initial revision are displayed on the screen during the start up sequence Revision 00 Software 882123 is the initial English language production software revision Software 882125 is the initial German language revision Software 882124 is the initial French language version Software 882123 2 is the current English language production software revision Software 882125 2 is the current German language revision Software 882124 is the current French language version Main differences to the initial software are 1 The average accuracy is improved by calculating it directly as the ratio of the average VCO2 to the average VO2 2 To enable artefact supression during measurements with continuous flow ventilators with bypass flows the low
18. PEP dee 8 2 83 TEST BASELINE TESTS IN CANOPY 8 3 84 TEST D BASELINE TEST ELEVATED OXYGEN LEVEL IN RESPIRATORY 22er 8 5 8 6 8 6 JTEST F SAMPLE FLOW a a a dou Sedes 8 8 8 7 TEST G LEAKAGE TEST Run 8 10 6 8 APTER REPAIR nenn 8 11 March Ist 1993 200 DELTATRAC II SERVICE MANUAL SPARE PARTS 9 1 Spare Parts 9 2 Service Accessories APPENDICES 12 1 Short Instructions for Use 12 2 Patient Connections 123 Calibration 12 4 Alarms 12 5 Keyboard Functions 12 6 Computer Output 127 CCP 104 Graphics Printer Preventive Maintenance Check List Service Diagnosis Sheets Alcohol Burning Test Pomme March 1st 1993 MBM 200 DELTATRAC SERVICE MANUAL 1 4 LIST OF FIGURES 4 4 42 Simplified Block Diagram essen aaa 4 6 4 7
19. analog zero adjustment to compensate for gradual contamination of the measuring chamber Cleaning see Section 6 3 6 1 is however always the first thing to perform when contamination is detected and zero adjustment should be done only in extreme cases when the cleaning is not successful NOTE The three other adjustments described below Gain Reference voltage and Temperature compensation adjustments are for reference only They are done at the factory See also the table Adjustments after component replacement on the previous page M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 7 3 Analog zero adjustment 1 Enter Diagnostic mode check 3 see Section 6 3 4 Let the monitor run at least 10 minutes to eliminate errors caused by initial warm up 2 Connect a CO absorber to the sample input 3 Using a digital voltmeter measure the CO output mother board test connector X13 pins 3 Adjust the output to zero with the trim resistor R23 in the measuring board In the Diagnostic mode the output voltage is automatically displayed on the screen 4 Detach the CO absorber Perform the software zeroing and gas calibration refer to Operator s Manual 0432 55 NIV9 v m m gt Figure 7 1 Adjustment Trimmer Locations March 1st 1993 200 DELTATRAC SERVICE MANUAL 7 4 adjustment For gain adjustment calibratio
20. 11 08 11 22 11 36 11 51 11 66 11 81 11 96 12 11 12 26 12 42 12 58 12 74 12 90 13 06 13 23 13 39 13 56 13 74 13 91 14 09 14 26 14 45 M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 7 6 Reference voltage adjustment 1 2 Connect digital voltmeter between measuring board connector pin 6b and ground Using trimmer R33 adjust the DVM to read 6 50 V Temperature compensation adjustment For adjusting the temperature compensation the following gas mixture is needed 5 to 9 CO in air The exact percentage is not critical but the same gas must be used throughout the adjustment For most accurate result the adjustment is performed in a temperature controlled room if available Atmospheric pressure should remain constant within 5 mbar during the procedure 1 Before adjustment let monitor be at room temperature with power off at least 4 hours Connect a digital voltmeter between test points T and T pins 1 and 3 at the preamplifier board flat cable connector 3b and 4b at of the measuring board Switch power on and enter Diagnostic mode check 2 to draw the CO sample through the sampling line see Section 6 3 4 Let the monitor run approximately 10 minutes Adjust R16 on the preamplifier board until the DVM reads Zero Adjust the analog zero of CO as described before Feed the CO test gas and make a note of the reading obtained Let the unit ru
21. 15V 3 i 28 28a 28a 9 PAS 7 7 D T 2 7 GND 10 b 227b 7 27 p 5 26 l YT aD 968 NNUS 25c b 255 2256 Sa a OO Ua Le 02 osi C ENDE rn ee Ci EDS 224 10 RTSO 70 ia 229 259 11 Ser out 2 22 Ole 226 19 RTSB Pump on 5 228 or m Ser out 1 o Ser in 1 221b 2215 Mir gb eb wir 205 206 20 10 206 205 Hehe RTSA 0 0 TR 2195 Sc 19 ak S 018 2 10h 19b 1 1 ee 18 Ser out 2 oke 18 18 malta 3 2 2 re TS MEETS TT Ser in 2 ic ia 189 217 217 217 Te 5 9175 MER Ub 2175 6 170 717 a 20 Reset 7 tB KT 16 8 othe 65 A160 9 E ola 2160 2189 2150 10 156 156 15 215 21 68 T 150 8150 o ib 215 22 ogg SG ollo DI REED SENE CEA 0120 16 olin 23 PBS 140 14 1 tea 13 13 13c 13c i 913b 913b 24 PB X13 915 1 13a TEST connector 12 122 ol2c 0122 126 ol2b 25 3 GND 1 err 1 12 T 602 ADC 0 3 Tib Tib Mr 20 ADC 1 4 nenn 02 3 5 RT g loc m P ADC 5 6 ET 2 100 09 PBe ADC 2 X12 ADC 7 ADC 6 DAC 1 DAC 0 DAC 2 Alarm DAC 5 DAC 6 7
22. 51 Sampling System Schematic diagram 5 3 52 CO Gas Absorption SDeCEA eese sess s eene 5 4 53 CO Measuring System Block Diagram 5 5 4 photonietepa E nn 5 7 55 O Measurement Functional Principle 5 11 56 Valve Control Board Block Diagram tetto ttt tette tls 5 14 54 CPU Board Block Diagramm 5 16 5 8 Video Controller Board Block Diagram 5 18 6 1 General Troubleshooting 6 9 62 Diagnostic Mode Sample Sources i oos er e ee 6 14 63 Sampling System Troubleshooting Chart 6 16 64 Canopy Mode Measuring 2 6 17 6 5 Respirator Mode Measuring Sequence 6 18 6 6 Sampling System Schematic Diagram and Parts Layout 6 21 67 Synchronizing Board Parts Layout and Schematic Diagram 6 24 6 8 Preamplifier Board Parts layout and Schematic Diagram 6 25 6 9 Measuring Board Parts Layout Timing Diagram and Schematic IBI TCU PER 6 26 6 10 Valve Control Board Troubleshooting Chart 6 29 6 11 Valve Control Board Parts Layout and Schematic Diagram part 1 nnne 6 30 6 12 Valve Control Board Schematic Diagram part 2
23. DAC 3 DAC 6 MBM 200 DELTATRAC II SERVICE MANUAL Figure 6 22 Hall Board Parts Layout NJ HALU BOARD 4F 081492 1 March 1st 1993 200 DELTATRAC SERVICE MANUAL 6 47 Figure 6 23 Keyboard Parts Layout board modification level 3 and lower March 1st 1993 200 DELTATRAC 11 SERVICE MANUAL 7 1 7 ADJUSTMENTS 7 1 Adjustments After Component Replacements COMPONENT ADJUSTMENTS REPLACED CPU BOARD Software or the whole board See Section 6 3 8 1 Real time clock Real time clock frequency Section 7 5 2 circuit D16 or crystal Z3 GAS MEASUREMENT Flow generator valve Check flow constant Section 5 4 control board GAS MEASUREMENT IC s diodes Zero and gain Section 7 2 transistors or passive components Reference diode V2 Reference voltage Section 7 2 measuring board Photodetector Temperature compensation zero and gain Section 7 2 measuring chamber IR lamp filter wheel or whole photometer Preamplifier board Temperature compensation Section 7 2 Measuring board Zero and gain Section 7 2 Pressure transducer Change also the zero and temperature compensation resistors Adjust pressure measurement zero and gain Section 7 3 March 1st 1993 200 DELTATRAC SERVICE MANUAL 7 2 72 Measurement Adjustments adjustment that may be occasionally needed is
24. If there is no voltage check the LAMP ON signal from the measuring board connector pin 13b If the line is high the mosfet V27 is faulty if low the chopper motor is probably stalled Check for timing pulses from the preamplifier board AGC amplifier A4 faulty Coarsely erroneous or missing reference voltage Missing timing pulses see Figure 6 9 Impossible to adjust Measuring chamber contamination clean see Section 6 3 6 1 zero Impossible to adjust AGC malfunction Check analog switches and A4 False reference voltage Faulty temperature compensation circuit Strong drift Moisture or dust in measuring chamber Clean measuring chamber see Section 6 3 6 1 Leakage in sampling or internal tubing Loose screws in photometer malfunction Check analog switches and control pulses March 1st 1993 Repeated baseline error message at calibration Software calibration range insufficient CO response missing Random output resembling noise Chopper motor not running Calib gas not accepted MBM 200 DELTATRAC SERVICE MANUAL 6 23 Clean the measuring chamber Check gas measurement analog zero and adjust see Section 7 2 Check gas measurement analog output and adjust gain see Section 22 Analog switch faulty or control pulses missing Other components fault in the measuring electronics Check by following the signal with an oscilloscope along the amplifier chain Timing pulses out
25. Under some conditions the CO measuring chamber may however be contaminated causing zero or drift problems In this case the measuring chamber has to be cleaned using Datex Measuring Chamber Cleaning Fluid P N 85969 WARNING Using alkaline detergents may cause permanent damage to the internal parts of the gas sensors Clean the measuring chamber as follows 1 Turn off the monitor 2 Remove auto calibration box and top cover 3 Remove the CO measuring unit by removing the two screws on the rear panel Disconnect both the CO measuring unit gas inlet thin and the gas outlet tube thick Replace the inlet tube with a short approximately 10 cm piece of the sampling line and the outlet tube with silicone tube 4 Slowly inject cleaning solution into the silicone tube the outlet tube Hold the tubes up so that the solution stays inside the measuring unit 5 Leave the fluid inside from 1 to 24 hours 6 Rinse the measuring chamber at least twice with distilled water injected in the same way 1 Dry the measuring chamber completely by blowing air into it using a syringe CAUTION Continue drying until all liquid has been blown out from the measuring chamber 8 Reconnect the inlet and outlet tubes Attach the CO measuring unit back on the rear panel 9 Turn on the monitor and let it run until the CO reading stabilizes WARNING Using alcohol or other flammable liquids to clean the measuring chamber causes fire h
26. diff 05 KB7 Y4 20 zero ADC5 GASPRESS 9 ADC2 ext PB lt DECI CO zero ADC3 02 10 ADC C02 PBl DEC 0 CO gt zero ADC 20 il 6 PB2 lt 20 1 2 12 A4 up addr PB3 lt EXT DECI 02 cal 5 2 bus PB4 lt EXT DEC freeze LAMP ON 14 Ag PB5 CTS2 CTSB 6 5 V AA Al 15 Tl CTS 6 lt 51 CTSA zero TORQ 16 WR PB7 CTSQ AA zero RD 17 10 RTSQ PCQ lt Reset 0 1 5 V 18 SER IN 8031 1 lt SER OUT 0 8031 19 P1 0 page select pc2 1 1 20 cntrl PC3 RTS A 0 21 SER IN 1 4 gt SER OUT 1 TXD A 22 TIMER IN IP 2YIPCS gt PUMP NSC RTSB 1 23 SER IN 2 RXDB PC6 SER OUT 2 TXDB 24 D6 PC7 RTSQ 25 04 data bus PAg 26 02 1 gt 27 00 2 gt 01 28 1873 gt INT 1 29 5 2 A digital 4 gt 5 data retention 30 5 V 2 A dirty 5 gt 15 V 2 A dirty 31 19 Vac 0 1 gt 1 12 1 video 32 GND D digital PA7 gt GND D dirty not used PPI Mode contr 4 63 H March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 1 6 SERVICE AND TROUBLESHOOTING 6 1 General Service Information Usually field service is limited to replacing the faulty circuit boards or mechanical parts The boards are then returned to Datex for repair DATEX TECHNICAL SERVICES is always available for service advice Please provide
27. lI uec Lt 500 8 Aun 012 ADDR f ADDR cga 187 15Y cys T m 024 TEN al 7 159 17 F 21 19 DUARI teen 3 1414 1669 026 C 5 os 7 15 3 td TRAR Y Y 1 ue 18 4 PPT 7 u pus ure 3 45 185 eL R1 11 O59WHz 12 6j 47 gst xed 17 5 Ven ong Re EE am TELS R13 maer 18 RxD F 13 ty 1K 7486387 5 RXD P2 0 59 31 TxD P2 1 ol INTS P2 2 6 INT P2 3 16 ste 4 Vee eee T 11 92 6 2 6 RD P2 7 4HC 567 8 1 2 3 4 5 C26 R7 681K 15 asy MUX 7 15 15V 159 920 0118 4 15 12 ds c22 23 460 4 E 6132 C8 DACA 14 HS Be geh Ae om Far bi Hiec PB6 9 3 BI 10V REF 19 P85 1454 AS pac zer ZU pos ot Bt MT PB2 811 2 22 1 19 19 82 p 9 RT T BAGS EN Ta 14 BIT re ee mas 15 818 GND 1 819 06528 U AS DAC LO 83 mm cae DAC 9 MUX 3 447 650mAh re el e We ee eT BUS
28. 0 l min children 3 0 l min babies The flow value is calibrated specifically for each unit Alarms Patient disconnection and loss of fresh gas flow in canopy mode no breathing alarm Loss of power duration 1 minute Low air flow Tidal volume alarm in respirator mode March 1st 1993 Display MBM 200 DELTATRAC H SERVICE MANUAL 4 2 9 monochrome picture tube with graphics Resolution 1024x256 pixels Real time clock Running time from the beginning of the measurement 2 selectable trend windows Printer Time External connections Dimensions Weight Warm up time Power requirements Operating temperature Storage temperature Relative humidity Safety Ordering information parameters EE in both measurement modes and VE only in respirator mode normal trend 2 hours and long trend 24 hours in respirator measurement normal trend 1 hour and long trend 4 hours in canopy measurement Numeric values of VCO VO and EE in both measurement modes additionally and VE in respirator mode Ink jet printer with graphics capabilities 96 x 96 dots per inch Speed 150 characters per second Interface RS232C Noise level 50 dB A Dimensions W x D x H 292 x 206 x 89 mm Weight 2 5 kg Power requirements 100 120 220 240 V AC 50 60 Hz 8 0 W Built in real time clock and calendar RS 232C serial interface for computer and graphics printer Composite video output
29. 1 79 1 84 1 89 1 94 1 99 2 04 2 09 2 14 2 19 2 24 2 30 200 DELTATRAC SERVICE MANUAL Figure 7 2 CO Linearization OUT V 3 05 3 10 3 15 3 20 3 25 3 30 3 35 3 40 3 45 3 50 3 55 3 60 3 65 3 70 3 75 3 80 3 85 3 90 3 95 4 00 4 05 4 10 4 15 4 20 4 25 4 30 4 35 4 40 4 45 4 50 4 55 4 60 4 65 4 70 4 75 4 80 4 85 4 90 4 95 5 00 5 05 5 10 5 15 5 20 5 25 5 30 5 35 5 40 5 45 5 50 5 55 5 60 5 65 5 70 5 75 5 80 5 85 5 90 5 95 6 00 6 05 2 35 2 40 2 46 2 51 2 57 2 63 2 68 2 74 2 80 2 86 2 92 2 98 3 04 3 10 3 16 3 22 3 29 3 35 3 42 3 48 3 55 3 61 3 68 3 15 3 82 3 89 3 96 4 03 4 10 4 17 4 24 4 31 4 39 4 46 4 54 4 61 4 69 4 17 4 85 4 93 5 01 5 09 5 17 5 25 5 33 5 41 5 50 5 58 5 67 5 76 5 84 5 93 6 02 6 11 6 20 6 29 6 38 6 48 6 57 6 67 6 76 T V 6 10 6 15 6 20 6 25 6 30 6 35 6 40 6 45 6 50 6 55 6 60 6 65 6 70 6 75 6 80 6 85 6 90 6 95 7 00 7 05 7 10 7 15 7 20 7 25 7 30 7 35 7 40 7 45 7 50 7 55 7 60 7 65 7 70 7 75 7 80 7 85 7 90 7 95 8 00 8 05 8 10 8 15 8 20 8 25 8 30 8 35 8 40 8 45 8 50 8 55 8 60 8 65 8 70 8 75 8 80 8 85 8 90 8 95 7 5 6 86 6 96 7 06 7 16 7 26 7 36 1 46 7 56 7 67 7 71 7 88 7 99 8 10 8 21 8 32 8 43 8 54 8 66 8 71 8 89 9 01 9 13 9 25 9 37 9 49 9 62 9 14 9 87 10 00 10 13 10 26 10 39 10 53 10 66 10 80 10 94
30. ADULT flow constant If an adjustment greater than 4 liters per minute has been done the test including gas calibrations should be repeated Write the new flow constant in calibration label on the rear panel 4 1 Sources of error in flow calibration a Alcohol burning is an accurate and reliable method to calibrate flow if the procedure is followed carefully There are however certain sources of error and the most common of which are listed below Inaccurate gas calibration A relative error of 1 in CO gain e g CO is calibrated to 5 05 instead of 5 00 will cause an error of 1 in the flow constant O calibration is not important The monitor should be calibrated with an accurate calibration gas and the warm up period should be at least 30 min to ensure good stability during the test Inaccurate pressure calibration An error of 8 mmHg will cause an error of approximately 1 in the flow constant The alcohol dose is not accurate An error of 1 96 in the dose causes an error of the same magnitude in the flow constant Use only one mark pipettes Avoid air bubbles 1 pipette Alcohol evaporates from the burner vessel If the burner vessel and burner base are still warm after the preceding test approximately 1 of the alcohol will evaporate during 1 minute Even if the burner vessel is allowed to cool down g between successive tests the test should be started within 2 minutes after the dos
31. Adjustment Real Time Clock Frequency Adjustment There is one adjustable capacitor on the CPU board for real time clock oscillator frequency It is factory adjusted but may need to be readjusted if some components are replaced The real time clock oscillator frequency is set by connecting a counter to pin 15 of D16 and adjusting C49 to read 256 00 Hz corresponding to a cycle time of 3906 25 us March 151 1993 7 6 200 DELTATRAC II SERVICE MANUAL 7 13 Canopy Mode Baseline Adjustments In room air Imbalance in the sampling system may cause an offset drift in the O signal This may alter the measurement results in the canopy mode If the drift is small it is possible to correct as follows Settings Press STOP END CLEAR CLEAR NEW PATIENT Choose Canopy mode Flow selector wheel in adult mode Artifact suppression OFF in SETUP menu Averaging OFF in SETUP menu Printer option numeric in SETUP menu Perform test C baseline test in room air of Chapter 8 FUNCTIONAL CHECK PROCEDURES 2 Calculate the fifteen minute average of 3 Enter FACTORY SETTINGS menu by resetting the monitor and holding MARK RESET key during initialization 4 Move the cursor to the line BASELINE CORRECTION and enter the fifteen minute average value with the opposite sign if the average value is 5 then enter 5 value is automatically calculated and displayed 5 Repeat test and make sure that the fift
32. DAMPING CHAMBER gt CONSTRICTION CASSETTE 1 THREE WAY VALVE C 0 NON ENERGIZED 1 ENERGIZED M arch 1st 1993 02 MEASURING UNIT DAMPING CHAMBER 1 Gua SAMPLE T c02 MEASURING UNIT PRESSURE TRANSDUCER 00 CO2 MEASURING BOARD CO2 ABSORBER DUST FILTER NW THREE WAY VALVE COMMON THESE CASSETTES THESE CASSETTES C FLOW GENERATOR oc leo 0 1 0 NORMALLY OPEN ARE LOCATED UNDER ARE LOCATED BETWEEN QUTLET FLOW 1 NORMALLY CLOSED THE MOTHER BOARD FRONT PANEL AND VALVE SELECTOR WHEEL Cli C CONTROL BOARD 200 DELTATRAC SERVICE MANUAL 6 22 6 3 6 CO Measurement Troubleshooting For troubleshooting the CO measurement system refer to parts layouts and schematic diagrams in Figures 6 7 synchronizing board 6 8 preamplifier board and 6 9 measuring board If the fault has been located to the CO measurement system the following table can be used to find the exact cause of malfunction SYMPTOM FAULT Sudden increase in Measuring chamber contamination clean see Section 6 3 6 1 CO output possibly out of scale 15 V missing fault in the power supply No response to CO Missing supply voltage fault in the power supply Loose or blocked tubing Loose cable connections Sampling pump failure IR lamp or power supply failed Check the IR lamp resistance approximately 3 5 Ohm and the lamp voltage 4 VDC min
33. DELTATRAC SERVICE MANUAL Exploded View of The Monitor Figure 9 1 March Ist 1993 200 DELTATRAC SERVICE MANUAL 12 1 12 APPENDICES 12 1 Short Instructions for Use Performing a Measurement Empty the water trap and connect sampling line Position flow selector wheel on the rear panel to suit the patient Turn on the monitor and graphics printer Check that no error messages appear on the screen If does troubleshoot the monitor see section 6 SERVICE AND TROUBLESHOOTING If performing a cold start let the monitor warm up for 30 minutes otherwise 5 minutes Calibrate the monitor as described in CALIBRATION in the following page Change the operating mode with the CHANGE MODE key if necessary Connect the tubes as shown in PATIENT CONNECTIONS Start the measurement with the START STOP key Interrupt and restart the measurement with the START STOP key if necessary Finish the measurement by first pressing the START STOP key to interrupt the measurement and then press the END key During the measurement the PATIENT DATA key can be used to enter the patient data and the DISPLAY PRINTER key to rearrange the display as well as activate the printer See Keyboard Functions section in this chapter for a more detailed description of the key functions NOTE Refer to the Operator s Manual for more details March 1st 1993 200 DELTATRAC II SERVICE MANUAL 12 2 12 2
34. RXDI 4 RTSI 3s 3 CTSI Bs 6 PBI TTL not used 7 Signal ground 8 TTL not used 9 12 50 mA max 10 12 50 mA max Not connected 12 Not connected 13 CTS2 TTL not used 14 TXD2 TTL not used 15 5 500 mA max 16 RXD2 TTL not used 17 PAS TTL not used 18 PA6 TTL not used 19 RTS2 TTL not used 20 TTL not used 21 26 VDC 1 A max 22 Not connected 23 26 VDC 1 A max 24 22 1 A max 29 22 VAC 1 A max NOTE CTS clear to send 12 V enable transmission RTS request to send not used presently No serial inputs used Serial channel 2 is unbuffered TTL DO NOT CONNECT EXTERNALLY For test purpose only The maximum current ratings for the supply voltage outputs pins 9 through 12 15 21 an 23 through 25 are for the total of both serial analog I O and AUX VO AUTION Connect cables manufactured or recommended by Datex to the rear panel connectors March 151 1993 200 DELTATRAC SERVICE MANUAL 5 1 5 DETAILED DESCRIPTION OF MODULES 5 1 Sampling System The function of the sampling system is to draw gas samples into the CO and O measuring systems at a fixed rate and to separate condensed water and impurities from the gas flow The gas samples are taken from the inspired gas through the external sampling line from the mixing chamber through the front panel from the air reference through the front pa
35. START key Wait for 30 seconds The actual measuring sequence will start measurement time will restart from zero Light up the alcohol and put on the cover NOTE Alcohol evaporates The test should be started within 2 minutes after step 3 After approximately 20 minutes the flame will die by itself NO BREATHING alarm will result Wait until the VCO goes below 10 mL min Calculate the total amount of CO produced during the test by summing up all minute to minute VCO values on the printout Alternative method Press LONG TREND key and read average VCO and the measurement time excluding seconds The total amount of CO produced is the multiplication of these two quantities When using this method it is important that both averaging and artifact suppression are OFF Make sure that all alcohol has burned out If not repeat the test starting from step 3 in Section 4 FLOW CALIBRATION 10 new flow constant adult can be determined following formula New flow 1 03x 3820mL _ total in mL x old flow NOTE If pure ethanol is not being used replace the figure 3820 mL with the appropriate reading See the examples in Chapter 1 BACKGROUND To adjust the flow constant and to read the old flow value enter Factory Settings menu by holding down softkey 1 during power up Move the cursor to line Flow calibration and press softkey 4 to start Adjust the
36. alarm limit of the mixed expiratory CO2 concentration is lowered from 1 to 0 2 in the mixing chamber 3 The calculation of FiO2 in respirator mode displayed and printed errors of several 96 for instance 52 96 actual FiO2 was displayed as 49 This flaw has been corrected 4 Printer selection increased to include EPSON type printer such as Kodak Diconix 18Osi February 1st 1994 1 200 DELTATRAC H SERVICE MANUAL 4 1 4 GENERAL DESCRIPTION 4 1 Specifications Method Gas measurement ranges CO measurement measurement Flow measurement Typical flow Open system indirect calorimeter for measurement of both mechanically ventilated and spontaneously breathing patients consumption 5 2000 ml min CO production 5 2000 ml min Inspiratory sampling rate 150 ml min Datex infrared sensor Range 0 10 90 Baseline drift Automatically compensated Gain drift 2 96 of full scale 24 hours Gain temp drift 0 2 96 of full scale Linearity error 2 of full scale Automatic compensation for CO O collision broadening effect Differential paramagnetic sensor Range low resolution channel 100 100 96 high resolution channel 10 10 90 Baseline drift Automatically compensated Gain drift 2 96 24 hours Gain temp drift 0 296 Linearity error 2 Automatic compensation for respirator pressure effects 80 0 l min obese persons 40 0 l min adults 12
37. as it was Return to the measurement mode by pressing NORMAL SCREEN twice Enter the SETUP menu enter correct time and set other settings as they were Perform pressure calibration The measured value must be the same as the correct ambient pressure Perform gas calibration March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 34 Figure 6 13 CPU Board Troubleshooting Chart CHECK THE BOARD VISUALLY ALL THE ICS ARE IN SOCKETS Clock runs but starts from 0 00 REAL TIME CLOCK NOT RUNNING BATTERY GI Completely dead CHECK D16 AND 73 CHECK ITS TREND MEMORY INTERNAL BATTERY NOT AVAILABLE MAYBEFLAT RESET SIGNAL D5 PIN 9 IS IS 11 059 MHz CLOCK D5 PINS 18 19 OK IS PSEN D5 PIN 29 STATIC IS 5 V SUPPLY OK NO SPIKES NOT BELOW 4 75 V CHECK POWER SUPPLY BOARD CHECK RESET ON POWER SUPPLY BOARD CHECK CPU CLOCK CIRCUIT Z1 CHANGE CPU D5 OK REPLACE CPU BOARD March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 35 Figure 6 14 CPU Board Parts Layout and Schematic Diagram CONNECTOR JUMPER MEMORY TYPE D6 32k x 8 RAM D6 8k x 8 RAM DI 512k EPROM DI 2M 4M EPROM D4 RAM D4 EPROM Norm Test NTN TN RD 1 Q3 W 876637 2 n 014 BATT ORD CODE 1750 March 1st 1993 I 5
38. canopy mode Triggered by patient disconnection and or loss of fresh gas flow Low air flow alarm n both modes Triggered by too high more than 2 5 Power off Power disconnection alarm In both modes Duration 1 minute Can be silenced by pressing the white button on the rear panel March 1st 1993 200 DELTATRAC II SERVICE MANUAL 12 5 12 5 Keyboard Functions NOTE Display returns to normal screen when 60 seconds have elapsed since the last key touch in Setup Patient data Display Printer and Set alarms menu Press SETUP to Select units of measurement Make starting selections Set real time clock This key is valid only in the MEASUREMENT OFF state Press NORMAL SCREEN key to exit Press DISPLAY Rearrange the display PRINTER to Activate the printer Press NORMAL SCREEN key to exit Press PATIENT Enter patient data sex weight height age and nitrogen DATA to excretion press SAVE to store data Press NORMAL SCREEN key to exit Press SET ALARMS Set the digital volume alarm on or off to Set the tidal volume alarm level Press NORMAL SCREEN key to exit Press SILENCE Silence the tidal volume alarm in the respirator mode ALARM to Silence the no breathing alarm in the canopy mode Silence the low air flow alarm in both modes NOTE To silence power off power disconnection alarm press the white button on the rear panel for several seconds March 15 1
39. choose Calibration and finally choose Pressure calibration Adjust pressure if the correct value is known 3 Perform gas calibration 4 Note pressure temperature and O LOW readings in all diagnostic checks 1 2 3 and 4 Limits are pressure all check points 10 to 30 mmHg below ambient pressure checks 1 3 and 4 within 10 mmHg of each other temperature 0 to 10 above ambient temperature equal to flow generator exhaust gas temperature CO 0 01 0 15 equal to ambient CO level Oy 0 2 40 2 O LOW 0 20 0 20 5 If pressure levels are not within limits check sampling system or pressure transducer If temperature is not within limits check temperature measurement If gas levels are not within limits check gas measurement system or repeat calibration 6 Select different diagnostic checks Breath into the sampling line air inlet and mixing chamber sample inlet and verify that the gas signals respond accordingly OUJLOW should be close to each other NOTE In diagnostic check 3 both the reference and measurement flows are taken from the mixing chamber sample inlet Normally the Oz signal should settle to zero independent of what gas mixture is being fed into the mixing chamber sample inlet March 1st 1993 200 DELTATRAC SERVICE MANUAL 8 2 8 2 TEST RQ TEST NOTE In tests and connect a printer in numeric mode 1 Turn pow
40. connector on the rear panel The total flow should be between 170 and 260 ml min 3 Connect the rotameter to sampling line S L and select Diagnostic mode check 1 Measure the flow in ml min Measure the same flow in Diagnostic mode checks 2 3 and 4 Fill in the first row of the table 4 Connect the rotameter to mixing chamber sample inlet M C Measure the flow in Diagnostic mode checks 1 2 3 and 4 Fill in the second row of the table 3 Repeat the procedure with the rotameter in AIR inlet and flow generator F G sample inlet 6 See Table 8 2 for the limits M arch 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 8 9 Table 8 2 The Allowed Ranges for Different Total Flows The total flow is between 170 and 200 ml min 0 0 100 200 The total flow is between 230 and 260 ml min i CHECK 1 2 3 4 arch 1st 1993 200 DELTATRAC SERVICE MANUAL 8 10 8 7 TEST G LEAKAGE TEST Block the sampling line inlet air inlet mixing chamber sample inlet and flow generator sample inlet Connect a silicone tube length about 50 cm to the sample gas outlet on the rear panel Drop its other end into a glass of water Let the monitor run for several minutes in Diagnostic mode There should be less than one bubble per 10 seconds coming out of the tube If a leakage has been detected it can be localized by closing the sample line at different locations st
41. light is passed through a chamber containing the main flow gas measurement and a chamber containing reference gas The measurement is made by determining the ratio between the two light intensities See Section 5 3 2 for a detailed description of this unit The CO channel is zeroed automatically using a CO absorber Figure 5 1 shows the schematic diagram of the sampling system the components layout is illustrated in Figure 6 6 The oxygen sensor has two input ports One port draws in the main flow and the other draws in room air for reference The sensor measures the pressure gradient by exposing both gases to an oscillating magnetic field See Section 5 3 Both gas flows exit from a single port Magnetic valves Gas sampling is controlled by magnetic valves The measuring sequence is illustrated in Figures 6 4 and 6 5 and Tables 6 1 and 6 2 give the corresponding valve positions The differential nature of the measuring system is utilized when measuring the difference between the inspired and mixed expired oxygen concentration Room air is drawn into the internal system and the gas sensors by activating the valves Canopy mode In canopy mode the flow generator draws gas at a fixed rate 80 l min for obese person 40 l min for adult 12 l min for child and 3 l min for baby The rates are adjusted with the flow selector wheel on the rear panel Flow cassettes The internal flow rates are set using flow cassettes These cass
42. lt 9 8 6V5 REF 4 1 x N BAS NI ros lt c29 c30 4 NOTE BOARD LEVELS 4 AND BELOW DON T HAVE SWITCH 51 March 151 1993 vr Car 15V C31 asy Ci 15 475 022 0222 0 22 Eta 5 PZ vuogo Vss ve 154 C25 022 DS 1 2 4520 Bin 06 4046 D 2017 D 4520 5 R80 vu R RI R2 out 09 a 00 un 44 Ch Rae 200 6 022 Wk 10k 0003 4052 Vie oo 04 6053 9 dark x vol I Ver Vss C 621443 IEN C3 CJ v5 82 2c di LP 200 20 XL CO CAL Sign GNO cal 126 P zero 00 6 07 IL JL Je m Qus 3 meus RI R ers n 79 tet al Jef al zl 29 CSS lowest PLL looking frequency setting Dit ref CO N20 Value of C55 can not connected 2n2 303 1 15v Cg wi 8324 setting of mta speed of R126 6103 107 on B can connected 8265 C tim 4 Ton syne IC 1 659 7 2 1 x V 1 temp comp 10 1 8 i temp comp f
43. needed in addition to an instrument for measuring the pressure Disconnect tube from pressure transducer on the measuring board Apply low pressure Pj to the transducer and adjust the offset trimmer R46 until the output voltage pin 8a of the pcb connector is at the voltage V P mmHg l000 20 V 10 V Apply high pressure e g atmospheric and adjust the output with the gain trimmer R47 to the voltage V mmHg 1000 20 V 10 V Repeat the steps 2 and 3 until the readings remain stable A number of adjusting cycles is usually necessary to reach this state Perform pressure calibration CAUTION To avoid permanent damage to the pressure transducer it must never be exposed to pressures higher than 2 bar absolute pressure M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 7 9 7 4 Oxygen Unit Adjustments The adjustments for the measuring unit are zero gain and frequency adjustments In case of any other trouble the sensor should be replaced and the faulty one be sent to Datex for repair Zero adjustment Because O measuring unit is a differential sensor which actually measures the difference between O concentrations in the sample and reference gases its output must be adjusted to equal zero when atmospheric air is present at both inputs 1 Connect digital voltmeter to the output of sensor mother board test connector X13 pin 5 2 Let the monitor d
44. of The Monttor ns 9 5 March 181 1993 MBM 200 DELTATRAC II SERVICE MANUAL 1 5 LIST OF TABLES 4 la Rear Panel D connectors Serial Analog 1 22 000000000000000 000000000500 4 8 4 16 Rear Panel D connectors AUX nennen 4 0 5 21 6 1 Sample Sources at Different Phases of Canopy Mode 6 17 6 2 Sample Sources at Different Phases of Respirator Mode 6 18 63 Sampling System Parts 66 6 19 64 Blow Constrictio Cassettes sea nr 6 20 Test Table for Sampling y u uQ uu hu eau Aa Pho RM alte 8 7 8 2 The Allowed Ranges for Different Total Flows 8 9 March 181 1993 MBM 200 DELTATRAC II SERVICE MANUAL 2 1 2 WARNINGS AND CAUTIONS A WARNING indicates a potentially harmful situation to yourself or others ELECTRIC SHOCK HAZARD Connect this equipment only to a three wire grounded hospital grade receptacle Where a two wire receptacle is encountered a qualified electrician must replace it with a properly grounded three wire receptacle Do NOT remove the grounding prong from the power plug Do NOT use extension cords or adapters of any type The power cord and plug must be i
45. rapid check Keyboard replaced Check for audible feedback from each key adjust volume if necessary March 1st 1993 200 DELTATRAC SERVICE MANUAL 9 1 9 SPARE PARTS 9 1 Spare Parts Item numbers refer to the exploded view of the monitor in Figure 9 1 Mains power related parts Item description Order No Fuse 2 5 A slow 51118 Fuse 3 15 A slow 51119 Mains cable EUR 54563 Mains cable USA 86236 Mains transformer 100 882531 Mains transformer 115 882532 Mains transformer 220 240 882529 Button switch for silencing power failure 52280 Power entry module w switch and fuses 54017 External housing parts Top cover 872894 Side panel right 882543 Side panel screw 61655 Front panel w plastic sticker ENG 882539 Front panel w plastic sticker GER 882541 Front panel w plastic sticker FRE 882542 Screen frame 872761 Bottom plate 881611 Rear panel ENG 882096 Rear panel GER 882401 Rear panel FRE 882395 Foot front 65160 Foot rear 65161 March 151 1993 200 DELTATRAC SERVICE MANUAL Sampling system parts Water trap complete O ring for water container 1 of 2 pcs Sampling line connector Luer compatible Sampling pump CO absorber Internal sampling system incl magnetic valves Magnetic valve without port plug Special internal sample tube see Fig 6 6 Constriction cassettes Sample out connector Gas measuring parts Preamplifier board CO
46. the preamplifier are shown in Figure 6 8 The purpose of the preamplifier is to amplify the signals from the infrared detector timing sensor and thermistor and to convert them to a lower impedance level The amplifier for the infrared detector is a straightforward non inverting AC amplifier The temperature signal from the stabilizing diode is converted to voltage T with an inverting amplifier Al This signal is further inverted to T by another amplifier in Al When the temperature rises T goes up and T down The zero level of the signals is set using R16 and the individual compensation signals for CO and N O with R7 and R6 respectively The current signal from the timing sensor is converted to a voltage with the remaining section of AI March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 5 9 5 2 4 CO Measuring Board The measuring electronics can be divided into a few functional blocks refer to the measuring system block diagram in Figure 5 3 Detector bias generator The lead selenite detector is a resistor whose resistance changes with intensity of infrared light The detector is supplied with a high bias voltage to produce a high signal level The bias voltage generator is a square wave oscillator refer to Figure 6 9 and a voltage doubler consisting of diodes V6 to V9 and capacitors C34 C35 C37 and C38 The circuit produces an output voltage range of approximately 22 V Timing electronics
47. time should be within 0 1 _ FAIL Test B RQ Test RQ value should be between 0 64 and 0 69 Service Repair Action Taken Customer Name and Address ALCOHOL BURNING TEST FOR DELTATRAC METABOLIC MONITOR Deltatrac is a trade mark of Instrumentarium Oy Helsinki Finland Document No 882700 March 1993 Datex Division of Instrumentarium Corp P O Box 446 SF 00101 Helsinki Finland Tel 358 0 39411 Fax 358 0 1463310 Telex 126252 datex sf CONTENTS in 2 ALCOHOL BURNING 1 2 2 0 2 0 0200 0222 000000 3 3 AEN 5 4 BLOW CALIBRATION aussi 6 41 Sources of error in flow 7 1 BACKGROUND The Deltatrac II Metabolic Monitor measures oxygen consumption and carbon dioxide production Therefore its performance can be evaluated by burning a known chemical compound and analyzing the produced gases A suitable material for this purpose is ethanol which is oxidized as follows C H OH 3 O 2 3 H O Respiratory Quotient is VC0 VO 2 3 0 67 The atomic weight of carbon hydrogen and oxygen as well as the calculated molecular weight of ethanol are C 12 011 g H 1 008 g 15 999 46 069 The molar volume of gases in STPD Standard Temperature and Pressure Dry gas conditions is 22 4138 L Using the chemical reaction noted above it is possible
48. wrist strap Handle all pc boards by their non conductive edges and use anti static containers when transporting them When servicing the sampling system make sure not to leave any tubes touching the sampling pump Abrasion may damage the tubes When assembling or disassembling any part inside the monitor be careful not to kink or damage the gas sampling tubes Leakages in the gas sampling system affect accuracy of measurement and are difficult to detect Check the oxygen sensor after servicing the monitor Breathe into the sampling line and confirm that the O waveform changes after each breath Please get acquainted with other operational cautions listed in Operator s Manual March 1st 1993 200 DELTATRAC SERVICE MANUAL 3 1 3 INTRODUCTION AND APPLICABILITY OF THIS MANUAL 3 1 Introduction and Applicability of This Manual This service manual Doc No 882330 and the separate Panasonic M K9101NB CRT Data Display service manual available from Datex Doc No 572760 give the information required to maintain and repair the Datex Deltatrac MBM 200 Metabolic Monitor This manual is applicable for the current production revision of the monitor Differences between monitor revisions are summarized in Section 3 2 and the technical details of earlier revisions in Chapter 11 Section 3 3 lists the technical hardware changes made to the monitor and Section 3 4 the software changes The revision of the monitor
49. 7 Flow Constant Adjustment VCO and VO measurement is based on the principle that the gas flow through the flow generator is a known constant This constant can be programmed in the FACTORY SETTINGS menu The following test is based on the fact that when an amount of 5 ml pure ethanol burns the reaction yields 3820 ml of CO NOTE Commercially available pure ethanol is usually not 100 pure Correct the CO yield to correspond to actual alcohol content See detail in Alcohol Burning Test Kit for Deltatrac Monitor in Appendix It is recommended that the flow constant is checked and possibly adjusted every 2 months by the following procedure Turn power on and let the monitor run at least 30 min The results are best recorded using a printer in continuous numeric output form 2 If the ambient pressure is known accurately perform pressure calibration Perform gas calibration Settings Press END to clear data Choose Canopy mode Flow selector wheel in adult mode Artifact suppression OFF in SETUP menu Averaging OFF in SETUP menu Printer option numeric in SETUP menu 3 Connect the alcohol burner for a canopy mode test see Figure 8 1 4 Using pipette fill the alcohol burner vessel with 5 ml of ethanol NOTE Alcohol evaporates The test should be started within 2 minutes after the step 4 5 Start measurement pressing START key 30 seconds The actual measuring sequence will start measu
50. 993 to Press LONG TREND to Press CAL to Press START STOP to Press END to Press MARK RESET to MBM 200 DELTATRAC II SERVICE MANUAL 12 6 Change the measurement mode only in the MEASUREMENT OFF state Display a long trend for 15 seconds The display returns to normal screen automatically or by pressing the NORMAL SCREEN key Start the calibration procedure only in the measurement OFF or INTERRUPTED state Start stop interrupt the measurement End the measurement after it has been stopped Mark an event Press for 5 seconds to reset the monitor March 13 1993 MBM 200 DELTATRAC II SERVICE MANUAL 12 7 12 6 Computer Output Patient and measurement data is sent to the PC serial amp analog I O connector The data format is 9600 baud 8 bits no parity 1 stop bit when all data is dumped after the measurement During continuous output the baud rate will be 1200 baud CTS is also used Dumping mode Measurement results are sent when requested from END menu all at once All calibration results which are stored are then sent Up to ten last calibrations after the last power up or key reset are sent The sending continues with patient data string and then minute by minute measurement results of that patient If multiple patients are measured the sending continues with the next patients patient data string and measurement results Max
51. D 96 info PAT string type patient data calibration time year month day hours minutes date of birth month year sex female MAL male height cm weight kg amp ace years amp months amp weeks urinary nitrogen 2 24 amp mg 24 CR carriage return hex D ER line feed hex A March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 12 9 Measurement result output string format The string is identical in continuous sending and data dump option except EE and temperature are zero in data dump string since they are not stored e g DOI 000 014 053 030100 020200 068 000000 209 295 406 031 068000 276 766 001 000 CRLF Contents of the three digit fields monitor ID D and string type ID Ol meas data marker number real time hours real time minutes x 0 01 ml min in STPD 0 9999 99 po x 0 01 ml min in STDP 0 9999 99 R 0 999 0 9 99 x 0 1 24 h 0 in data dump 0 99999 9 x 0 1 96 Frco2 F co2 X 0 01 Fioo Fgoo Fioo F o5 x 0 01 2 respiration rate min Vg x 0 001 l min in resp mode in canopy mode 000 0 999 999 temperature x 01 0 in data dump pressure mmHg artefact 0 no artifact 1 artifact status NOT USED 000 CR carriage return hex D LF line feed hex A March 1st 1993 200 DELTATRAC II SERVICE MANUAL 12 10 12 7 CCP 104 Graphics Printer The CCP 104 15 an HP ThinkJet graphics pr
52. E MANUAL 8 5 8 4 TEST D BASELINE TEST ELEVATED OXYGEN LEVEL IN RESPIRATORY MODE Set up complete respirator mode measurement configuration according to Figure 8 4 Start ventilating the test lung using relevant respirator settings and nominal concentration of 60 Start the respirator mode measurement Allow at least 10 minutes to let the system reach steady state Follow the O difference numbers in the numeric printout The deviations should stay within 0 1 and 0 1 If the deviation is more but relatively stable the reason can be a leakage either in the mixing chamber or in the FIO sampling adapter connection If deviation fluctuates considerably up and down the O air blender of the respirator may not be capable to produce stable enough mixture Then an additional pressure regulator at the air outlet of the wall supply usually helps RESPIRATOR EXPIRATION TEST LUNG Figure 84 Baseline Test in Elevated Oxygen Level Respiratory Mode M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 8 6 8 5 TEST E COMPLETE TEST Perform Test A rapid check Perform test G leakage test Draw a table like Table 8 1 Arrange test gas preferably 5 CO and 95 O Go to Diagnostic mode and choose check 1 Feed the test gas to the monitor through the sampling line S L After 20 seconds note down the and O LOW readings and fill in the first row of the ta
53. Hg from those of ambient air inlet and the mixing chamber In this case the sampling line the water trap or the special tube may be partly blocked If the message disappears when the sampling line is removed and power is turned off and on again the block may be in the water trap or in the special tube The results of self diagnosis pressures are automatically displayed in Diagnostic mode in FACTORY SETTINGS menu See Section 6 3 4 NOTE These values are not updated but are measured only during power on March 1st 1993 200 DELTATRAC Acceptable values Air pressure ref Air line to ref Mix chamber to ref Sampling line to ref Sampling line to mix SERVICE MANUAL 6 5 equal to ambient 10 mmHg 10 30 mmHg 10 30 mmHg 10 30 mmHg 10 10 mmHg If the air line pressure CHECK 2 is 14 mmHg and sampling line to ref is 35 mmHg then the difference between sampling line pressure and air line pressure is more than 20 mmHg and Gas flow error message 15 displayed In this case there is probably partial block in the sampling line in the water trap or in the special tube NOTE the above explanation of the sampling system self diagnosis is valid if the valves work correctly This can be checked with Diagnostic mode checks 1 4 see Section 6 3 4 by feeding calibration gas or breathing into the appropriate sampling points See also Functional Check A in Section 8 1
54. OBLEM DIAGN MODE O2 SIGNAL OK CHECK O2 SENSOR 1 DIAGN MODE O2 SIGNAL OK YES CHECK O2 SENSOR CHECK O2 SENSOR CHECK NTC CABLE TEMP MEAS PROBLEM POWER INTERRUPT YES ALARM FAILURE CHECK ALARM BACKUP M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 6 30 Figure 6 11 Valve Control Board Parts Layout Schematic Diagram part 1 IN 7 881559 31 lt gt m u I o lt 2 4 2 m gt 2 D M arch 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 31 Figure 6 12 Valve Control Board Schematic Diagram part 2 March 1st 1993 pcc der 55 5 X1a 3 DAC7 selftest Xie 7 _ADC mux X16 01 16 5v 4m UNIT gt gt 6 6 1 X1c X10 12 AS X1c 13 Xic 1 190 7 ey z jz gt 14 RI 35 Xi 17 tacis NIMI TATEA VALVE 17727 294 INSTRUMENTARIUM OY 25145 22 eua SERS cs REFRESH 14 C26 Hole indentificotion X4 55 HAL C16 127 4 lt lt 1 R29 2 167 ref C37 121 Auto calibration stvy LATTE 209 CONTROL BOARD w es AE o o2 EP 292 pr 38 881457 1 De p
55. Patient Connections a Canopy connection in room air c Respirator Connection March 1st 1993 12 3 Calibration 200 DELTATRAC H SERVICE MANUAL 12 3 High Accuracy Calibration Gas P N 874617 containing O and CO is installed into the monitor This gas allows easy calibration of both sensors The gas can will provide about 30 calibrations Calibrate the monitor at least once a day after a 30 minute warm up Press the CAL key to start the calibration procedure when the measurement is in INTERRUPTED or OFF state Select GAS with the softkey First baseline is checked and then calibration gas is automatically fed to the monitor If manual calibration is chosen in Gas setup start feeding the calibration gas when the message FEED CALIBRATION GAS appears on the screen Feed gas until messages CO ACCEPTED and O ACCEPTED appear on the screen This will take approximately 15 to 30 seconds Adjust the readings to their nominal values with the DECREASE and INCREASE softkeys Move to the next gas with the NEXT softkey When both sensors are calibrated move back to the monitor mode with the NORMAL SCREEN key NOTE If separate gas sources are used for calibration repeat the procedure gas by gas March 156 1993 MBM 200 DELTATRAC II SERVICE MANUAL 12 4 12 4 Alarms The following alarms are included in the monitor Tidal volume alarm n the respirator mode No breathing alarm n the
56. RAC II SERVICE MANUAL 6 11 DIAGNOSIS 1 02 from sample tube 02 from air CHECK2 CHECK2 02 from air CO2 from mix chamber CHECK3 02 from mix chamber CHECK3 CO2 from sample tube CHECKY 02 from outflow CO2 from outflow RESULTS SELFDIRGNOSIS Air pressure lt ref 754 mmHg Rir line to ref 13 Mix chamber to ref 15 Sample tube to ref 13 Sample to mix e On the first page of the Diagnostic mode the results of power on self diagnosis are displayed at the bottom They should be Air pressure ref ambient air pressure 10 mmHg Air line to ref 10 30 mmHg Mix chamber to ref 10 30 mmHg Sampling line to ref 10 30 mmHg Sample to mix 10 10 mmHg By using 1 4 it is possible to change magnetic valve positions in the sample system so that gas is passed through from different sources see Figure 6 2 Real time gas concentrations and corresponding voltages are displayed For CO and O LOW the gas concentration is shown as a ten second average as well as deviation It is also possible to calibrate the monitor in the Diagnostic mode First press any of CHECK 1 to 4 keys Then calibration choices appear Gas Pressure Gas Set up March 13 1993 200 DELTATRAC II SERVICE MANUAL 6 12 CALIBRATION GAS Calibrate gases FRESSURE calibrate pressure GAS SETUP GRS SETUF set calibration mode and adjust gas concentration
57. RT unit The video controller board schematic diagram and parts layout are shown in Figure 6 15 For troubleshooting the video controller board refer to Figure 6 15 and the timing diagram in Figure 6 16 For the video display module refer to the separate Panasonic service manual If the picture has vertical stripes one of the video RAM s D9 016 is faulty The faulty RAM can be identified as follows Faulty column from left edge Faulty RAM n 0 1 2 8n 016 2 8n D15 3 8n 014 4 8n D13 5 8n 012 6 8 DII 7 8n D10 8 8n D9 March Ist 1993 200 DELTATRAC II SERVICE MANUAL 6 37 Figure 6 15 Video Controller Board Troubleshooting Chart No picture Vertical stripes in picture no Check ZI 02 Check 24 MHz clock OK Check viden RAM 3 TENT to table in Section 6 3 9 yes no Check D27 D26 Check 1 5 MHz clock OK Check pin 17 04 Check D3 D17 D19 a continuous pulse stream should be seen OK Check D5 D23 NOTE Use video controller board timing diagram Figure 6 16 to check 5 March 156 1993 MBM 200 DELTATRAC II SERVICE MANUAL 6 38 Figure 6 16 Video Controller Board Schematic Diagram Parts Layout and Timing Diagram board modification level 8 and lower VIDEO 5 HH S l Sa m CAO J 044 Control i 74 z a 10 870646
58. SCANNER D9 IS VALVE CONTROL BOARD OK IS SAMPLING SYSTEM OK CHECK FLOW GENERATOR CAL GAS CAN EMPTY General Troubleshooting Chart CONNECT AN EXT DISPLAY AND THE SCREEN OK TONE WHEN A KEY 15 PRESSED CHECK CPU CHECK VIDEO BOARD CONTROLLER BOARD CHECK ERROR MESSAGES CHECK VALVE CONTROL CHECK VIDEO DISPLAY MODULE BOARD WATCHDOG CPU BOARD CHECK THE PART IN QUESTION CHECK 02 SENSOR CO2 SENSOR INSTALL NEW CALIBRATION GAS CAN SECTION 8 8 PERFORM CHECKS IN AFTER REPAIR CHECKLIST March 151 1993 MBM 200 DELTATRAC II SERVICE MANUAL 6 10 6 3 4 Diagnostic Mode The Diagnostic mode is a useful tool for fault finding and checking the operation of the monitor To enter the Diagnostic mode 1 When switching power on keep pressing MARK RESET key until self diagnosis text appears If the power is already on activate reset by pressing down the MARK RESET key for several seconds and keep on pressing until the self diagnosis text appears 2 After a moment factory settings is displayed Go to Diagnostic mode and press start FACTORY SETTINGS SET DATE VERR MONTH DAY KEVBORRD SOUND UOLUME 1300 02 BRSELINE CORRECTION 0 M MIN TOT 0 FLOW CALIBRATION PRESS START DIAGNOSTIC MODE PRESS START FRCTORV RESET PRESS START 09 5 00 00 00 March 1st 1993 200 DELTAT
59. SERVICE MANUAL 5 14 Figure 5 6 Valve Control Board Block Diagram CAL SYSTEM BUS RUE GAS VALVE DRIVERS VALVES WATCHDOG RESET PPI REFRESH MIX CHAMBER DETECTION MICRO 2 SWITCH SELFTEST 02 02 02 LOW ALARM ar FREQUENCY VOLUME CONTROL SPEAKER 12V ALARM REGULATOR BACKUP x T VALVE SUPPLY FLOW GENERATOR SUPPLY March Ist 1993 5 5 CPU Board MBM 200 DELTATRAC II SERVICE MANUAL 5 15 The CPU board contains in addition to 8051FA CPU and the standard RAM and EEPROM several analog and digital VO functions The CPU board block diagram is in Figure 5 7 The CPU D5 refer to Figure 6 13 uses the CPU board internal bus to access most of the peripheral circuits the on chip peripheral ports are directly used for analog multiplexers MUX and serial channel 0 ASCH computer output The three memory chips are jumper selected for 2Mbit program EPROM DI 32 x 8 low current CMOS RAM D6 powered by the internal data retention battery voltage and EEPROM D4 for permanent calibration value memory Analog input signals are read through the multiplexer A3 to the A D converter A2 When a key is pressed keyboard scanner D9 interrupts the microprocessor and this reads from the scanner which key was pressed The microprocessor s RS 232 is connected to Serial amp Analog I O connector computer output Duart channel A is connected t
60. Sync board assy incl motor CO Measuring chamber CO IR detector block CO IR lamp unit CO Chopper wheel CO NTC resistor CO CO absorber box CO meas unit Chopper motor CO O measuring unit complete Spring for meas unit Spring for meas unit L 9 2 882623 65344 877068 870678 874643 881562 58534 733382 6 5 871981 872290 86323 86542 86543 871497 86622 48220 870724 872454 874892 873938 873939 March 151 1993 200 DELTATRAC II SERVICE MANUAL 9 3 PC boards and their parts Hall board 881556 CO measuring unit amp board complete 878582 Measuring board pressure transducer 873022 Keyboard 870645 Valve control board 881559 Valve control board back up capacitor 0 47 F 35390 Video control board 870646 Power supply board 880882 CPU board without software 881949 Software ENG 882123 Software GER 882125 Software FRE 882124 RAM IC w internal battery 139890 Plastic binder for RAM IC 64011 Lithium battery 3 4 V 650 mA 17503 Video display unit complete 875244 Value of resistor 51 on the valve control board is factory set for the flow generator installed in the monitor The value is either 243 ohm or 274 ohm If the valve control board is replaced and the new flow constant is below 38 l min change R51 to 243 ohm resistor If the flow generator is replaced and the new flow constant is over 45 l min change R51 to 274 ohm re
61. TE Despite the mentioning of gas measurement in the drawings the ability measure concentration is not utilized in this monitor Absorption 100 Filter Wavelength 15 5 0 uum Wavelength Figure 52 Gas Absorption Spectra March 1st 1993 66 IST yore lt DETAILED DIAGRAM 20 MEAS 20 REF SENSORI MEAS LOW CO2 SYNC PASS SIGN OUT RECT FILTER OPTIC CHANNEL 20 CHANNEL ZERO CONTR ONTR NO AMP SIGN OUT SVDC ZERO ADJ GAIN ADJ PHOTOMETER SURE SIGNAL OUT CO2 N20 MEASURING UNIT ZERO GAIN ADJ ADJ weiseig 12014 0 mu HDIAYIS II IDVALVLTIQ 007 WAN S S MBM 200 DELTATRAC II SERVICE MANUAL 5 6 5 2 2 Photometer The photometer is of dual path type The infrared light beam passes through a measuring chamber containing the gas to be analyzed and a reference chamber which is free of measurement is made by determining the ratio between the two light intensities The exploded view of the photometer is shown in Figure 5 4 A filter wheel is used to control the light from an incandescent lamp that passes through the photometer The filters are arranged so that light is passed sequentially first at the CO absorption wavelength through the reference chamber then through the meas
62. are being fetched If this line is static the processor is not running 4 RESET CPU 9 is normally low but pulled to 5 for a moment after power up If RESET is constantly high check the 5 V supply line for spikes or low voltage 5 If the real time clock is not running check D16 and 23 If it always starts from 0 00 when the power is switched on check battery Gl 6 If the trends vanish with no apparent reason check RAM D6 Its internal data retention battery may be exhausted The correct jumper positions will be found in Figure 6 12 March 1st 1993 200 DELTATRAC SERVICE MANUAL 6 33 6 3 9 1 Instructions When Replacing Software CPU Board Before replacing 1 3i After replacing 1 Go to factory settings menu see section 6 3 4 Diagnostic mode Write down BASELINE CORRECTION and 40 O BASELINE CORRECTION values The TOT values are the one to be remembered Go to flow calibration and start it Write down the adult flow constant in flow calibration menu All SETUP menu selections Perform a software reset by pressing MARK RESET key for several seconds Enter the factory settings menu Set the correct date and desired keyboard volume Set the O BASELINE CORRECTION to the value taken from the old software or CPU The exact value can be measured by functional check procedure C chapter 8 Enter the flow calibration menu and set the adult flow constant
63. arting from the sampling pump inlet and moving upstream Use also different diagnostic checks to localize the leakage CAUTION Only silicone tubes may be blocked by clamp Other tubes may be damaged March 1st 1993 200 DELTATRAC II SERVICE MANUAL 8 11 88 AFTER REPAIR CHECKLIST 2 1 22 NOTE 1 Baseline adjustments and flow constant adjustment should always be performed if several months have elapsed since the last adjustment NOTE 2 When performing flow constant calibration check that the steady state RQ is between 0 64 and 0 69 Follow the steps described in the test kit manual including pressure and gas calibration NOTE 23 O should be calibrated with test gas that contains oxygen as high concentration as possible e g 5 CO4 95 or 100 96 After every repair Baseline adjustment Section 7 6 constant adjustment Section 7 7 O transducer replaced Test G leakage test Test F sample flow test Offset and gain adjustment Section 7 4 Test E complete test Test C baseline tests in canopy mode Test D baseline test at elevated oxygen level in respiratory mode CO transducer replaced Test G leakage test Test F sample flow test Test A rapid check Test C baseline tests in canopy mode Test D baseline test at elevated oxygen level in respiratory mode CO transducer repaired Follow Table 7 1 Test G leakage test Test F sample
64. azard March 1st 1993 200 DELTATRAC SERVICE MANUAL 6 28 6 3 7 O Measurement Troubleshooting In case of response to O or strong drift check tubing for loose connection blockage or leakage If a baseline error message is displayed at calibration check the sensor analog output zero and adjust if necessary see 7 4 If the software calibration is not successful because the software calibration range is insufficient check the O sensor analog output and adjust the gain if necessary see 7 4 Because of the complex and very sensitive construction of the oxygen sensor no repairs should be attempted inside the sensor Instead if the fault has been limited into the sensor itself it should be replaced and the faulty sensor be sent to the factory for repair CAUTION Never apply an overpressure to the O sensor as the pressure transducer may be permanently damaged 6 3 8 Valve Control Board Troubleshooting See Figure 6 10 for troubleshooting chart and Figures 6 11 and 6 12 for the schematic diagram and parts layout of the valve control board March 1st 1993 200 DELTATRAC SERVICE MANUAL 6 29 Figure 6 10 Valve Control Board Troubleshooting Chart INITIALIZATION CHECK COMPLETE PPI Decoder REFRESH PULSES WATCHDOG VALVE CHECK PROBLEM CABLES AND CONNECTIONS NO VALVE SUPPLY VALVE DRIVERS VALVES O2 PR
65. ble Feed the gas through mixing chamber sample inlet MC After 20 seconds note down the gas readings and fill in the second row of the table Feed the gas through air sample inlet AIR After 20 seconds note down the gas readings and fill in the third row of the table Repeat these tests in Diagnostic mode checks 2 and 3 and fill the table accordingly NOTE In Diagnostic mode check 4 feed the gas through flow generator sample port F G 9 Limits The CO values marked X CO baseline in table should be within 0 03 0 15 The CO values marked X may deviate 0 4 CO from each other The values marked baseline should be within 0 3 0 3 The values marked Y may deviate 2 2 from each other The values marked Y may deviate 1 1 from each other 2 Y However a tolerance of 3 3 is allowed 3 43 0 M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 8 7 Table 8 1 Test Table for Sampling System Check Sample CO O LOW No source S L Xo Xo AIR X Yi Y 2 S L Xo Yo Yo 2 X Y E 2 AIR X Y 3 S L X Yo Yo 3 M C Xo Y Y 3 AIR Xo Yo Yo 4 F G X March 1st 1993 200 DELTATRAC SERVICE MANUAL 8 8 86 TEST F SAMPLE FLOW TEST Draw a table like Table 8 2 2 Measure total exhaust flow by connecting rotameter to sample outlet
66. connecting the pressure transducer to ambient air through absorber CHECK 1 with Y3 opened to absorber see Figure 6 2 The measured value is used as a reference in the following measurements error is displayed if the measured ambient pressure is not within 500 to 900 mmHg In this case the pressure transducer and or the related electronics has probably failed The sampling pump is started again and the pressure drop through the constriction cassette 2 to air inlet is measured CHECK 2 If the pressure drop is not between 10 and 30 mmHg a Gas flow error is given This may be caused by loose or blocked tubing Similarly the pressure drop measured through the constriction cassette 5 and Y4 to the mixing chamber must be between 10 and 30 mmHg CHECK 3 Additionally the measured pressure should be within 10 to 10 mmHg from the previous measurement Finally the pressure through the water trap and the sampling line is measured CHECK 1 If the pressure drop is more than 40 mmHg the message Occlusion is displayed and the occlusion procedure is started It may be caused by a blocked sampling line or large amount of water in it If the pressure drop is less than 10 mmHg the message gas circuit is displayed This can be caused by a missing sampling line or the water trap container The message Gas flow error is displayed if the pressure drop through the sampling line is not within 20 mm
67. cuit testing with an ohmmeter measuring of power supply voltages 6 3 13 Video Display Module Troubleshooting For video display module troubleshooting refer to Panasonic M K 9101NB CRT Data Display service manual available from Datex P N 572760 6 3 14 Hall Board Troubleshooting Check the board visually Check also magnets in the flow selector wheel March 1st 1993 200 DELTATRAC IH SERVICE MANUAL 6 45 Figure 6 21 Mother Board Parts Layout and Schematic Diagram board modification level 4 and lower VIDEO CONTROLLER BOARD B digital bus CPU BOARD er 871403 5 x3 CO N40 MEAS BOARD analog bus x8 KEYBOARD ID sticker Not n use March 156 1993 g 3 2 2o lt 3 ar x a 53 D 23 T ios e un e say TS 73 X5 N Flat cable connec gt N 2 1 GNDA 2 GND A 3 X9 A al 05 connector 4 21V 21 gt 15 b LEM 415 dirty a AG GND dirty 30 230 220 lt 2 5 2 12 er 5V_ORV S300 o309 2 3 4 SH Ox o Ax s oid one 8 a 0 305 5 L
68. d OE ENG RN WATCHDOG CIRCUIT R39 R46 45 vie y12 d 28 BC2128 4148 039 R45 t36 Pel R47 vio v18 16 YON N N 14 1446804144004 144004 1 4004 1 W Analog groung digitet ground R41 100 1 25 9 51kt vP0300u e R44 x3 ALARM 19 WIXING DETECTION x3 3 GENERATOR FAN x3 11 SIVU LAITE 2 2 MBM 209 8 0 MB 3B 881457 200 DELTATRAC SERVICE MANUAL 6 32 6 3 9 CPU Board Troubleshooting Due to the complexity of the LSI circuitry there are few faults in the CPU digital electronics that can be located without special equipment See Figure 6 13 for the CPU board schematics diagram and parts layout The analog part is somewhat easier to troubleshoot The input analog voltages are easily tracked to the MUX input After the MUX the voltages are multiplexed so that the resulting waveform is of 200 600 Hz frequency IR analog output is updated every 10 ms All other analog output channels are updated every 40 ms Thus the D A conversion interval is 5 ms The following checks may be performed 1 RAM EPROM CPU and other socketed properly installed and memory configuration jumpers are correct 2 The 11 059 clock signal at the CPU pins 18 and 19 use high impedance probe to check 3 PSEN CPU pin 29 shows that instructions
69. e 5 1 The keyboard is a simple 3 X 3 matrix which is scanned by the keyboard scanner on the CPU board 5 9 Video Display Module Video display module 15 a Panasonic M K 9 101 NBCRT data display module For operation information and troubleshooting instructions refer to the separate Panasonic manual Datex P N 572760 5 10 Auto Calibration Box The auto calibration box on the left side of the monitor contains one high accuracy calibration gas can which is connected with tubes and valves to the monitor and which supplies calibration gas automatically when a calibration is started There is a rack for spare gas can in the box 5 11 Flow Selector Module The flow selector module consists of flow selector wheel and its base and Hall board at the back of the base Small magnets sank in the wheel generate signal in the Hall board that corresponds to the selector position and the board transmits it to the valve control board for further processing March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 5 21 Table 5 1 System Bus Internal bus Fin e E 7 1 GND A analog keyboard Motor 15 V 0 2 A analog 2 10 V ref KBl X2 Sync 15 V 0 2 analoq 3 DAC6 alarm freq KB2 X3 T DAC7 selftest 4 DAC4 KB3 X4 T DAC5 alarm 5 DAC2 ext KB4 Y2 TIME OUT DAC3 ext 6 DACO ext 02 KB5 Yl 6 5 V CO DACI ext 02 7 ADC6 KB6 0 zero ADC7 ext 8 ADC4
70. e has been delivered into the burner vessel The flow provided by the Deltatrac Metabolic Monitor should not be restricted Use only the hose and connectors supplied with the test kit Make also sure that the produced gases allowed to flow freely from the flow selector wheel on the rear panel The density of ethanol varies with The given value for ethanol density is at 25 C If the temperature is 10 C higher the density will be approximately 1 lower and the flow constant will be 1 too high Pure ethanol will absorb water from ambient air until an equilibrium concentration of 96 volume is achieved In order to avoid this the cover of the alcohol container should be closed immediately after use
71. een minute average is within 6 6 Write down the TOT value on the rear panel March Ist 1993 200 DELTATRAC SERVICE MANUAL 7 14 In elevated oxygen level Before this adjustment be sure that the previous adjustment in room air is done and possible baseline correction is performed Also make sure that the monitor has been on for more than one hour Settings Press STOP END CLEAR CLEAR NEW PATIENT Choose Canopy mode Flow selector wheel in adult mode Artifact suppression OFF in SETUP menu Averaging OFF in SETUP menu Printer option numeric in SETUP menu 1 Perform test C baseline test in elevated oxygen level of Chapter 8 FUNCTIONAL CHECK PROCEDURES Start measurement when oxygen level is raised to 40 2 level 2 Disregard the results of first 10 minutes Keep the results of the following 30 minutes 3 Disregard the 5 largest and 5 smallest results Calculate the average of 4 Enter FACTORY SETTINGS menu by resetting the monitor and holding MARK RESET key during initialization 5 Move the cursor to the line 40 O BL CORRECTION and enter the average value with the opposite sign if the average value 15 5 then enter 5 TOT value is automatically calculated and displayed 6 Repeat test C and make sure that the average is within 9 7 Write down the TOT value of the elevated oxygen on the rear panel March Ist 1993 200 DELTATRAC II SERVICE MANUAL 7 15 7
72. er on and let the monitor run for at least 30 minutes Perform gas calibration 2 Prepare the alcohol burner for a canopy mode test Light the burner and start the test Let the measurement run for at least 15 minutes see Figure 8 1 for alcohol burner set up 3 The fifteen minute average of the measured RQ should be within 0 64 0 69 SAMPLING TUBE CANOPYHOSE Figure 8 1 Alcohol Burning Test in Room Air March 1st 1993 200 DELTATRAC SERVICE MANUAL 8 3 83 TEST BASELINE TESTS IN CANOPY MODE In room air and in elevated oxygen level 1 Start acanopy mode measurement without anything connected to the monitor VO and VCO should be zero Let the measurement run for at least 30 minutes after it has warmed up The fifteen minute average of VCO should be within 5 ml min and that of VO within 10 ml min The VO baseline error should be corrected according to Section 7 6 If the error is greater than 40 ml min check the sampling system Repeat the test in elevated oxygen level The fifteen minute average of should be within 8 ml min and that of VO within 15 ml min SAMPLE Figure 82 Baseline Test in Room Air in Canopy Mode M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 8 4 SAMPLE 55 FLOW T LUER Figure 83 Baseline Test Elevated Oxygen Level in Canopy Mode March 1st 1993 200 DELTATRAC SERVIC
73. ettes are used to balance flow and pressure the and CO measuring units during different stages of the measuring sequence Sampling pump and damping chamber The sampling pump is a vibrating membrane pump driven by a 50 Hz 12 V 0 4 A square wave current The damping chamber is used to even out the pulsating flow and silence the exhaust flow March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 3 Figure 5 1 Sampling System Schematic diagram AIR CALIBRATION MIXING CHAMBER GAS CAN DUST FLOW GENERATOR gt N SELECTOR 0 79 gt SEL Dd DUST WHEEL WATER Sees sn Y2 1 gt d gt lt AN 4 lc erdssune TRANSDUCER SAMPLE PUMP DAMPING 1 CONSTRICTION CASSETTE 0 d THREE WAY VALVE C 0 NON ENERGIZED 1 ENERGIZED M arch 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 4 5 2 Principle of CO Measurement 5 2 1 General The CO gas measurement is based on absorption of infrared light as it passes through the gas sample in measuring chamber in the photometer The light absorption is measured at 4 3 micrometers wavelength using an infrared detector The signal processing electronics receive the signals from the IR detector and demodulate it to get component out of this signal which correspond to the content of CO gas in the sample Figure 5 2 shows the CO gas absorption spectra NO
74. flow test Test A rapid check Test C baseline tests in canopy mode Test D baseline test at elevated oxygen level in respiratory mode March 1st 1993 10 11 MBM 200 DELTATRAC II SERVICE MANUAL 8 12 Repairs in the sampling system Test G leakage test Test F sample flow test Test A rapid check Test C baseline tests in canopy mode Test D baseline test at elevated oxygen level in respiratory mode Magnetic valve replaced Test G leakage test Test A rapid check Test C baseline tests in canopy mode Test D baseline test at elevated oxygen level in respiratory mode Flow generator replaced Baseline adjustment see Section 7 6 Check flow constant see Sections 5 4 and 7 7 Valve control board replaced Check temperature measurement in Diagnostic mode with a thermometer placed in the flow generator outlet on the rear panel Allowed tolerance 4 C Test A rapid check Check flow constant see Sections 5 4 and 7 7 Video processor board replaced Check picture on the screen Check video output on the rear panel with a slave monitor CRT module replaced Display adjustments on CRT driver board Power supply board replaced Check data retention Start a measurement turn power off for 10 to 14 minutes 15 minutes maximum Turn power on and verify that unit enters MEASUREMENT INTERRUPT state Test A rapid check Mother board replaced Check picture on the screen Test A
75. for slave display CO and analog signals Depth 340 mm Width 420 mm Height 310 mm 460 mm with printer on top 2 kg without Printer 30 minutes after a cold start 100 115 220 240 50 60 Hz 90 VA 10 35 5 50 10 to 90 96 601 C22 2 No 125 Order code MBM 200 March 1st 1993 200 DELTATRAC II SERVICE MANUAL 4 3 4 2 Principle of Operation The Deltatrac Metabolic Monitor can be used to monitor gas exchange and energy expenditure of both spontaneously breathing and mechanically ventilated patients Figures 4 1 illustrate the three patient connections i e canopy mode in room air and in supplementary oxygen and respirator mode measurements The expired gases from the patient are collected into the mixing chamber part of the monitor The Deltatrac gas measuring system takes gas samples from the inspiratory gases through a separate sampling line the mixed expired gases from the mixing chamber the output of the constant flow generator and through the air reference inlet Out of the oxygen and carbon dioxide concentrations in these gas samples it is possible to determine carbon dioxide production oxygen consumption respiratory quotient VCO VO energy expenditure EE minute ventilation VE displayed only in respirator mode The flow rates of the constant flow generator have been determined individually for each monitor March 1
76. gas may pass unnoticed in spite of alarms Use a separate O monitor to measure oxygen concentration in the canopy Use a pulse oximeter to ensure that the patient is sufficiently oxygenated OCCUPATIONAL SAFETY After monitoring patient with hepatitis virus monitor cover the water trap container the mixing chamber and all used accessories must be disinfected with 5 chloramine solution Handle the water trap as you would any body fluid Infectious hazard may be present The operator should not perform any servicing except as specifically stated in the Operator s Manual OTHER WARNINGS After performing any repair calibration procedure to monitor perform a final electrical safety check and leakage current test There are special components used in this device which are vital to assure reliability and safety Datex assumes no responsibility for damage if replacement components not approved by Datex are used The manufacturer accepts no responsibility for any modifications made to the monitor outside the factory Please get acquainted with other operational warnings listed in Operator s Manual March 181 1993 200 DELTATRAC SERVICE MANUAL 2 3 A CAUTION indicates a condition that may lead to equipment damage or malfunction STORING x Do not store the monitor outside the specified temperature range 5 to 50 O INSTALLING Do not apply tension to line
77. gram Commands from the CPU come through a buffer D3 refer to Figure 6 15 to the video processor D4 The processor converts the CPU commands to operations on a bit image in the video RAM memory DIO through D16 The video RAM is then continuously scanned by addressing logic D23 and a video shift register D5 to produce a 24 MHz dot stream that forms the screen image The display processor adds the synchronization information which is separated into vertical 50 Hz and horizontal 15 kHz components before being sent to the CRT unit The signals are also combined into a composite video signal which is output to the rear panel Clock and timing signals are made with the 24 MHz crystal 21 counter 027 and sequencer 026 The timing diagram is also in Figure 6 15 March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 5 18 Figure 5 8 Video Controller Board Block Diagram gt Video sync SYNC Sepa rator H sync Video po Comp video Sync Video shift resister System Data Video 7 Graphic bus a bus Buffer display 5 processor Address decoder 24 MHz CAS RAS 1 MHz e clock 5 124 MHz clock Counter Sequencer March 13 1993 200 DELTATRAC II SERVICE MANUAL 5 19 5 7 Power Supply and I O Board The primary of the power supply is designed to double insulation requirements for added safety There are two fuses The primary operating voltage is factory selec
78. h the alarm off button switch on the rear panel If the voltage at pin 5 of A2 is high the pulses from pin 5 of alarm oscillator D7 can proceed to the loud speaker driver transistor V8 at full amplitude i e the alarm is on at maximum sound level The sound level can be altered by varying the DC voltage at pin 5 of A2 This is how the CPU can control the alarm sound level with voltage DACS Signal from the microswitch for mixing chamber detection is amplified in A3 and sent to D3 for software purpose The gas temperature is measured with an NTC resistor located in the flow generator gas outlet tube on the rear panel The temperature signal is amplified also in A3 Part of A3 is also used for amplifying the oxygen signal when small oxygen differences are being measured March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 5 13 The 12 V supply voltage for the constant flow generator and the gas sampling valves is regulated with A4 Value of resistor 51 is factory set for the constant flow generator installed in the monitor The value is either 243 ohm or 274 ohm If the valve control board is replaced and the new flow constant is below 38 l min change R51 to 243 ohm resistor If the constant flow generator is replaced and the new flow constant is over 45 l min change R51 to 274 ohm resistor Changing the value of R51 will increase decrease the flow constant about 4 5 to 5 0 l min March 1st 1993 200 DELTATRAC II
79. imum data storage on DELTATRAC I is 24 hours of measurement either continuous or piece by piece from several days End of sending is not indicated separately but can be detected by e g 5 second timeout Continuous mode During measurement the results are continuously sent minute by minute The patient data string is sent when measurement is started If patient data on DELTATRAC is entered after starting the measurement it will not be sent to the PC The patient data input on the PC should be used instead The result of the last calibration before the measurement is sent when measurement is started After that calibration results are sent after each calibration March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 12 8 Calibration result string format e g D57 CAL 092 001 001 000 000 000 000 000 000 000 CRLF Contents of the three digit fields monitor ID D and string type ID 97 info CAL string type calibration calibration time year 88 00 87 1988 2087 month da hours minutes ambient CO 0 999 0 9 99 CO measured 0 999 0 9 99 CO set value 0 999 0 9 99 O measured 0 999 0 99 9 O set value 0 999 0 99 9 carriage return hex D LF line feed hex Patient data output string format e g D96 PAT 093 001 029 014 052 015 006 053 FEM 160 050000 039 007 002 009800 CRLF Contents of the three digit fields monitor ID D and string type I
80. inter Except for the oldest version models it is an IEC 601 1 class II devices and do not require an isolated cable The nonisolated connecting cable is available from Datex P N 875370 For troubleshooting the printer please refer to the HP ThinkJet service manual See below for the correct DIP switch settings 1 345678 1 2 34 5 51 2 345678 12 345 MODE RS 232 C March 1st 1993 1 3 MBM 200 DELTATRAC METABOLIC MONITOR PREVENTIVE MAINTENANCE CHECK LIST We recommend that the following checks and tests are performed at least once every six months to keep the monitor in good condition 1 Visual Inspection OK J L 1 Rear panel dust filter clean at least once month 2 External sampling system tubes for proper connection If the monitor is serviced internally m 3 Internal sampling system for sharp bends and dirt 4 CO absorber when saturated ambient CO will be below 0 03 at calibration At calibration the displayed ambient CO is the value of its concentration in air normally 0 04 or more minus its concentration in air filtered by absorber 0 when the absorber is new but increases as it gets gradually saturated 5 O rings conditions in mixing chamber and plugs Grease with silicone Replace if necessary 2 Preliminary Functional Checks OK L L 6 Screen for distortion adjust if necessary 7 Mixing chamber for leaks clean if di
81. interrupt alarm circuit signal amplifier for measuring small oxygen signals temperature amplifier power regulator for the constant flow generator and gas sampling valves and analog multiplexer The valve control board block diagram is in Figure 5 6 The parts layout and schematic diagram are shown in Figure 6 11 The programmable peripheral interface PPI circuit D2 controls the valve drivers consisting of D5 D6 D8 and D9 Auto calibration valve is controlled by D9 The analog signal to be connected to the mother board analog channel ADC6 is selected by the PPI Hall board in the flow control wheel base sends the detected wheel position to the PPI The purpose of the watchdog circuit is to make sure that the CPU and a part of the peripheral electronics is functioning properly The CPU writes refresh pulses to the circuit via the PPI If the pulse interval is greater than the watchdog time constant approx 60 ms D4 starts sending RESET pulses to the CPU The alarm frequency is generated by one half of the dual oscillator D7 This frequency can be altered by the CPU board by varying the DAC6 voltage which is connected to the control pin 3 of D7 The function of the other part of the oscillator D7 is to generate an intermittent alarm sound if the refresh pulses to the watchdog circuit stop or when the power switch is turned off or the monitor is unplugged in the canopy mode This alarm can be reset by discharging capacitor C32 wit
82. ion SETTING NO GAS Unsuccessful calibration Repeat calibration If the message CALIBRATION reappears check gas sampling system 24 HOUR MEMORY Clear data from memory with END and CLEAR menus Press the FULL soft key for CLEAR ALL DATA March Ist 1993 200 DELTATRAC SERVICE MANUAL 6 8 6 3 3 General Troubleshooting Chart Field service of the Deltatrac II is intended to be done as board swapping where possible Thus the most important part of troubleshooting is to pinpoint the faulty module NOTE Whatever the trouble is always check the AC and DC voltages on the system bus using a voltmeter NOTE The parameters are normally measured at the system bus The real time CO and O readings are displayed in the Diagnostic mode see Section 6 3 4 The gas concentration in per cent and the corresponding analog voltages are listed in the linearization Table Figure 7 1 Full scales are O 7 9 V and CO 7 5 V nominally March 1st 1993 DISPLAY OK INITIALI ZATION COMPLETE NO RESPONSE TO KEY BOARD Y BEEP FLOW GENERATOR TEMP MEAS PROBLEM N INACCURATE RQ TEST B INACCURATE VO2 VCO2 GAS PRESS CALIBRATION PROBLEM MBM 200 DELTATRAC SERVICE MANUAL Figure 6 1 IS FAN RUNNING CHECK MAINS FUSES POWER SUPPLY BOARD INITIAL TEXT REMAINS ON THE SCREEN CHECK KEYB CABLE CPU BOARD
83. is changed when technical changes are made to the monitor resulting In new spare parts that are incompatible with earlier units The last two digits of the monitor type designation denote the revision of the monitor e g 200 23 00 1s a revision 00 unit Functional units of the monitor pc boards and measuring units have ID code stickers indicating the modification level of the production documentation The code is shown as xxxxxx y where the xx represents the part number and y the revision level which is referred to when hardware changes are indicated in this manual Please review the Operator s Manual to obtain a clear understanding of the monitor The manufacturer reserves the right to make changes in product specifications at any time and without prior notice The information in this document is believed to be accurate and reliable however the manufacturer assumes no responsibility for its use Deltatrac II is a registered trade mark of Datex Division of Instrumentarium Corp Finland March 1st 1993 200 DELTATRAC SERVICE MANUAL 3 2 3 2 Manual Updates Revision 00 Initial production revision of the monitor March Ist 1993 200 DELTATRAC II SERVICE MANUAL 3 3 3 3 Manual Updates 3 3 1 Service Manual Changes This is update number 1 to the Deltatrac II Service Manual published on March Ist 1993 Carry out the update by replacing pages which already exist in this manual
84. it the power supply board the flow control wheel and its base the flow generator and the loud speaker are attached to the rear panel The rear panel can be tilted rearward by removing the four screws on the rear panel two on both sides at the middle level of the panel This gives access to those items The sampling pump and the oxygen transducer are located under the mother board mounting base To get access to these parts first remove the mixing chamber and the right side panel To get access to the sampling pump fastening screws the rear panel must also be removed The sampling system control module with magnetic valves and constriction cassettes is held on the mother board mounting base by two of the oxygen unit fastening screws For removing the video display module first remove the mixing chamber the top covers the auto calibration box and the bottom plate Then remove the screen bezel and the front panel with the printings Then open the four video driver board fastening screws under the electronics part mounting base and the four video screen fastening screws on the front panel and carefully remove the video display module M arch 1st 1993 200 DELTATRAC SERVICE MANUAL 6 3 6 3 Troubleshooting 6 3 1 Monitor Start up Sequence Externally Internally After the monitor is switched on Fan on the rear panel starts to run The self test text appears on the screen Program code and the notes to user are dis
85. it consists of the components shown in Figure 1 The kit can be used for long term tests for demonstrating or checking the performance of the Deltatrac II Metabolic Monitor Chapter 3 RQ TEST or for calibrating the flow constant of the monitor Chapter 4 FLOW CALIBRATION For the tests absolute ethanol is needed concentration e g 99 5 Other mixtures can also be used but this must be taken into account when performing flow calibration see the examples in Chapter 1 BACKGROUND NOTE The burner base decreases the total flow by 3 compared to the flow during patient measurement The correction in the formula is shown in Chapter 4 NOTE When dealing with absolute alcohol close the cover of the bottle immediately after use because it absorbs water from ambient WARNING The cover and the base warms up during test There is a risk of burn damages Let the parts cool down between successive tests CAUTION The aluminium base of the test kit can be cooled down by sinking it into cold water However this should not be attempted with the glass cover because large temperature variations may crack the cover ON tA Bm Figure 1 Cover Burner base Alcohol burner Alcohol burner vessel Canopy hose 35 mm fitting Pipette pump One mark pipette Alcohol Burning Kit Code 874868 874867 57246 57249 73321 874271 57247 57248 3 Turn power on and let moni
86. ml min for CO and 35 ml min for O after the highest and the lowest five values are discarded iy JJ 3 3 Write the flow constant value rear panel sticker 17 Go to Factory settings menu Check date and adjust keyboard volume if necessary 18 Check real time in Setup menu 19 Check conditions of the accessories plugs connectors canopy etc 20 Check the printer operation Check ink cartridge and printer paper stock DELTATRAC SERVICE DIAGNOSIS SHEETS Results of Selfdiagnosis DATE SERIAL NUMBER These values are shown when you enter into Diagnostic mode Air pressure ref Air line to ref Mix chamber to ref Ambient air pressure 10 mmHg 10 30 mmHg 10 30 mmHg Sampling line to ref Sample to mix Test A Rapid Check 10 30 mmHg 10 10 mmHg OK FAIL Normal values Test G Leakage Test Sampling system 0 01 0 15 96 1 1 V 0 2 0 2 1 1 V low 0 2 0 2 1 1 V Pressure 4 5 V FAIL FAIL Flow Constant Previous flow constant adult Alcohol used Estimated CO production Total CO production New flow constant adult If an adjustment greater than 4 liters has been done the gas calibration and the flow constant adjustment should be repeated Other new flow constants obese child infant Test Sample Flows T
87. n at least three hours with covers closed Best result is obtained if the room temperature is simultaneously raised by about 10 degrees After the warm up adjust the zero and feed the CO test gas Adjust the output with the preamplifier board trimmer R7 to the same reading as was obtained in the step 5 M arch 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 1 1 NOTE If CO zero has drifted more than 5 of full scale from the cold state do not attempt the compensation adjustment but try to locate the source of the drift and correct it Excessive zero drift is always an indication of a fault 8 Switch power off and let the monitor cool down for approximately 4 hours lowering if possible the room temperature simultaneously 9 Switch monitor on and let it run 10 minutes Adjust zero and check the span readings If they deviate more than 2 of full scale from those of the warm device repeat adjustment March Ist 1993 200 DELTATRAC SERVICE MANUAL 7 8 7 3 Pressure Measurement Offset and Gain Adjustments If the adjustment is needed because of replacing the offset trimmer it is enough to adjust the output to equal to the atmospheric pressure with the trimmer Otherwise these two adjustments must be made simultaneously because they have a strong mutual influence The adjustment procedure is as follows Some method of generating a pressure differing from the ambient e g a vacuum pump is
88. n gas is required concentration should be between 5 and 10 and should be known to within 5 or better 1 Let monitor run at least one hour Enter the Diagnostic mode check 3 see Section 6 3 4 and adjust the analog zero as described before 2 Feed the CO calibration gas and adjust the output mother board test connector X13 pin 3 with the trim resistor R16 in the measuring board to a voltage corresponding to the CO content in the calibration gas The voltage is listed in Figure 7 1 In the Diagnostic mode the output voltage is automatically displayed on the screen 3 Check and if necessary readjust the output voltage 4 Perform the software zeroing and gas calibration refer to Operator s Manual M arch 1st 1993 CO linearisointitaulukko OUT V 0 00 0 05 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 45 0 50 0 55 0 60 0 65 0 70 0 75 0 80 0 85 0 90 0 95 1 00 1 05 1 10 1 15 1 20 1 25 1 30 1 35 1 40 1 45 1 50 1 55 1 60 1 65 1 70 1 75 1 80 1 85 1 90 1 95 2 00 2 05 2 10 2 15 2 20 2 25 2 30 2 35 2 40 2 45 2 50 2 55 2 60 2 65 2 70 2 15 2 80 2 85 2 90 2 95 3 00 0 00 0 03 0 05 0 08 0 11 0 14 0 17 0 20 0 23 0 26 0 29 0 32 0 35 0 38 0 41 0 44 0 41 0 50 0 53 0 57 0 60 0 63 0 67 0 70 0 73 0 77 0 80 0 84 0 88 0 91 0 95 0 99 1 02 1 06 1 10 1 14 1 18 1 22 1 26 1 30 1 35 1 39 1 43 1 47 1 52 1 56 1 61 1 65 1 70 1 75
89. nel and from the diluted expiratory gas at the flow generator The sampling line is connected to the water trap on the front panel The pump inside the monitor draws gas from patient circuit through the sampling line to gas measuring units After the measurements the gas is exhausted from sample gas out connector on the rear panel of the monitor Water trap The sample gas enters the monitor through the water trap where it is divided into two flows main flow and side flow see Figure 5 1 The main flow goes into the measuring system described in Sections 5 2 and 5 3 The side flow creates a slight sub atmospheric pressure within the collection container which causes fluid to collect in it Sampling line The sampling line is an integral part of the total sampling system The resistance established by the sampling line is used by the software to set the flows and pressures during the turn on sequence The small inner diameter causes fluids such as blood or mucus not to propagate within the tube so that when the line is clogged it is replaced The Nafion tube Five special tubes are used to balance the sample gas humidity with that of ambient air The tube will prevent errors caused by the effect of water vapor on gas partial pressure when humid gases are measured after calibration with dry gases March 1st 1993 200 DELTATRAC SERVICE MANUAL 5 2 Gas measuring units In the CO measuring unit infrared
90. ng CPU and video controller boards are mounted directly on the mother board whereas the power supply board and flow selector wheel are on the rear panel and the keyboard on the front panel Auto calibration box that houses calibration gas can is attached to the left side of the monitor For monitor parts locations see Figure 9 1 in Chapter 9 March 1st 1993 200 DELTATRAC II SERVICE MANUAL Figure 4 2 Simplified Block Diagram FLOW GENERATOR MIXING CHAMBER SELECTOR WHEEL GAS SAMPLING CONTROL MODULE lt z Wm u 21513 RESET APIS ICAL VALVE CAL GAS CAN MIXING CHAMBER DETECTION CAL VALVE DRIVE OUD SPEAKER VIDEO DISPLAY MODULE VIDEO CONTROLLER BOARD IP CO N50 MEASURING BOAR D ANALOG BUSY lt in 2 S e 3E Jelg z ul ul lt 5 O S gt 3 9 W 42 I lt N gt lt HH OMP VIDEO OUT P SEES TRANSFORMER 232 KEYBOARD 4 6 ae EXPIRATORY GASES CANOPY MODE CONNECTOR FROM RESPIRATOR OUTLET OR PLUG INSPIRATORY 7 GAS SAMPLE March 1st 1993 200 DELTATRAC II SERVICE MANUAL 4 7 4 4 Wiring Diagram Figure 4 3 Wiring Diagram VIDEO CONTROL BOARD 1 0 CPU BOARD CO MEASURING BOARD VALVE CONTROL BOARD VALV
91. ntact and undamaged Do NOT immerse the monitor in water or any liquid Always turn the monitor off and unplug the power cord before cleaning or service Do NOT touch any exposed wiring or conductive surface while the cover is off and the monitor is energized The voltages present when the electric power is connected to the monitor can cause injury or death Never wear a grounding wrist strap when working on an energized monitor The CRT display unit contains high voltage circuitry FUSE REPLACEMENT For continued protection against fire hazard replace only with the same type and rating of fuse EXPLOSION HAZARD Do not use this monitor in the presence of flammable anesthetics PATIENT SAFETY Do NOT perform any testing or maintenance on medical instruments while they are being used to monitor a patient Do not measure a comatose or incapacitated patient with the canopy in a place without a source of back up power to assure continuous operation of the flow generator in the event of a power failure March 1st 1993 200 DELTATRAC SERVICE MANUAL 2 2 Constant attention by a qualified individual is required whenever a patient is mechanically ventilated Some equipment malfunctions require immediate action A malfunction may pass unnoticed in spite of equipment alarms Constant attention by a qualified individual is required whenever a patient is measured with the canopy Problems in delivery of fresh
92. o Aux V O connector graphic output Real time clock D16 is powered by a 3 4 V lithium battery Gl Oscillator frequency of the clock is adjusted with trimmer capacitor C49 Software features are described in the Operator s Manual Main differences between software revisions are described in Section 3 4 The correct jumper positions for different memory chips are listed in Figure 6 12 CAUTION There are lithium batteries one soldered to the board and another enclosed in IC D6 RAM Danger of explosion if they are incorrectly replaced Replace only with same or equivalent type recommended by Datex Discard used batteries according to manufacturer s instruction March 1st 1993 2661 IST PLN RESET PARALLEL 1 0 SERIAL IN gt 8 CPU SERIAL OUT c BOSIFA EPROM 8 bus X SERIAL 1 0 1 bus gt L 3 Y Duart SERIAL 1 0 2 SYSTEM BUS GASPRESS 2 N20 02 T 8 D A us S amp H 22 ANALOG OU channel conver conver ANALOG IN im MUX ler bus ter 8 76 8 og peog HOIAYYHS OVELVITAC 00 OLS 200 II SERVICE MANUAL 5 17 5 6 Video Controller Board The video controller board is based on an LSI graphics display processor which accepts commands from the CPU via the system bus and converts them to a video signal Refer to Figure 5 8 for block dia
93. of sync Check timing pulses from photometer pulse shaping circuit and logic circuitry on the measuring board see Figure 6 9 Motor faulty or connection loose Driver transistor C E open circuit or current limiter short circuit Check gas flow from cal gas bottle Install a new gas can Clean the measuring chamber March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 6 24 Figure 6 7 Synchronizing Board Parts Layout and Schematic Diagram board modification level 8 and lower VI OPB 706 A RI 1k 82 R3 100k 25 C VI OPB 706A 10 310012 BOTTOM WIEW March Ist 1993 200 DELTATRAC II SERVICE MANUAL 6 25 Sg Figure 6 8 Preamplifier Board Parts layout and Schematic E Diagram board modification level 10 and lower lt TE gt 2 dk 2 w o potra ee Ncc rien En c 2 EN ZERO 871408 6 gt ci de 151 1993 200 DELTATRAC II SERVICE MANUAL 6 26 Figure 6 9 Measuring Board Parts Layout Timing Diagram and Schematic Diagram board modification level 21 and lower 20 COARSE ZERO PRESSURE ZERO COARSE ZERO PRESSURE GAIN z z lt o v x
94. oltage and consequential the gain of the AGC amplifier March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 10 The signal from the output of A2 pin 7 is connected to the input of another operational amplifier 1 4 A3 The gain of this amplifier is adjusted by trim potentiometer R23 CO coarse zero so that the preset voltage and the signal cancel each other at Al pin 3 when there is no CO in the measuring chamber The span of the CO measurement is adjusted by R16 CO coarse gain The measuring phase of the signal is sampled with the analog switch 1 4 D1 and finally the DC signal 15 low pass filtered to reduce noise and switching ripple Motor speed control circuit The speed of the chopper motor is stabilized by the circuit consisting of a one shot and an integrator comparator The pulses from the timing electronics trigger the one shot at a frequency that corresponds to the speed of the motor The output pulses from the one shot are fed into the integrator comparator The voltage at the output of this circuit depends on the difference between the mean of the pulse train and the DC voltage at its other input This voltage is inverted and used to control the transistor 14 which in turn drives the chopper motor The circuit keeps the duty cycle of the pulse train constant and consequential stabilize the speed of rotation of the motor The transistor V 15 limits the motor current to approximately 50 mA March 1st 1993
95. otal flow ml min allowed range 170 260 ml min 1 2 3 4 S L Sampling line M C Mixing chamber sample inlet AIR Air sample inlet F G Flow generator sample inlet See the next page for the correct limit values ok FAIL The total flow is between 170 and 200 ml min CHECK CHECK2 3 4 0 0 851 180 The total flow is between 200 and 230 ml min CHECK 2 CHECK3 4 0 0 100 200 The total flow is between 230 and 260 ml min CHECK 1 CHECK 2 4 0 0 119 223 Gas Feeding Test Separate calibration gas can is needed in this test Feed gas to the source listed below and fill the table in unit CHECK 1 CHECK 2 CHECK 3 CHECK 4 NOTE x 0 03 0 15 X within 0 4 of each other Y 0 3 0 3 Y within 4 of each other Y within 2 of each other Y within 3 of Yo Y Y A tolerance of 3 is allowed C FAIL Test Baseline Tests Calculate the 15 minutes average values and fill the table Canopy mode In room air A Canopy mode In elevated level within 5 ml min A B within 10 ml min C within 8 ml min D within 15 ml min If the VO baseline error is greater than 40 ml min check the sampling system In elevated level in respiratory mode O difference in printout in 10 minutes
96. played After several seconds SELF DIAGNOSIS measuring sample system line pressures text appear Within a half minute fields for trends and numeric values appear The last chosen mode Respirator or Canopy and range Obese Adult Child or Baby also appear The monitor is ready for measurement after 5 minutes warm start or 30 minutes cold start After switching the monitor on or resetting it the RAM memory on the CPU board is checked with read write tests to every memory location The software EPROM is checked by reading the prewritten checksum The A D and D A converters are checked by generating a test voltage and reading it back through the valve control board The time read from the real time clock is verified to be rational and read write functions on the chip are tried If any one of these tests fails the error message is displayed Recalibrate all functions is displayed if the checksum on 15 incorrect software has been changed or a factory reset has been performed If a write read test on EEPROM fails the message failed is displayed Temperature error appears if the measured temperature is outside the range 10 55 March 1st 1993 MBM 200 DELTATRAC II SERVICE MANUAL 6 4 The sampling system is checked by measuring pressure gradients as the valves are connected to different sampling points First the ambient pressure is measured with sampling pump stopped by
97. raw in room air and adjust the voltage to zero with the trimmer OS see Figure 7 3 3 Perform gas calibration refer to Operator s Manual Gain adjustment 1 Adjust zero as described in previous section Enter Diagnostic mode check 1 see Section 6 3 4 2 Feed 100 oxygen gas and adjust the output to 7 9 V with trimmer see Figure 7 3 3 Check and if necessary readjust the zero and gain until the readings remain stable 4 Perform the gas calibration refer to Operator s Manual March 156 1993 200 DELTATRAC SERVICE MANUAL 7 10 Figure 7 3 Measuring Unit Adjustments VIBRATION INSULATION March 156 1993 200 DELTATRAC SERVICE MANUAL 7 11 Temperature compensation adjustment Factory adjustment only Frequency adjustment The switching frequency of the electromagnet of O sensor has been selected to be 110 Hz to avoid interference from harmonics of both 50 Hz and 60 Hz mains frequency Fine adjustment is seldom necessary However if you wish to reduce the effects of mechanical resonance peaks of the cabinet which appears as high noise level of the O measuring unit analog output above 20 mV peak to peak it is worth of trying the fine frequency adjustment One turn of trimmer F will change the frequency by 1 5 Hz Try to find minimum noise but do not deviate more than 5 Hz March 156 1993 200 DELTATRAC SERVICE MANUAL 7 12 75 CPU Board
98. rement time will restart from zero 6 Light up the ethanol and immediately place the cover over it March 156 1993 200 DELTATRAC SERVICE MANUAL 7 16 Let the measurement run until the flame dies approx 20 minutes BREATHING alarm will be triggered Wait until the measured VCO goes below 10 ml Check that all the alcohol has burned If not repeat the whole test Press STOP key Calculate the total amount of CO produced during the test by summing up all minute to minute VCO values on the printout Determine the new flow constant by the following formula 1 03 x 3820 TOTAL CO PRODUCTION x OLD FLOW CONSTANT The limits 38 to 45 see Section 5 4 Enter FACTORY SETTINGS menu by resetting the monitor and pressing MARK RESET key during initialization Move the cursor FLOW CALIBRATION Press softkey 4 and enter the new value NOTE If an adjustment greater than 4 liters has been done the gas calibration and the flow constant adjustment should be repeated Write down value on rear panel March Ist 1993 200 DELTATRAC SERVICE MANUAL 8 1 8 FUNCTIONAL CHECK PROCEDURES 8 1 TEST A RAPID CHECK Enter Diagnostic mode as described in section 6 3 4 Verify that initial messages with software revision appear on the screen No error messages should be displayed 2 Perform pressure calibration enter any diagnostic check and then
99. rty Detached the chamber from the monitor and perform this test Airtightness is checked by plugging the chamber and pumping 20 mmHg pressure air into it through luer connector The pressure must not drop below 5 mmHg 3 seconds 213 3 Main Functional Checks OK UFER 8 Perform TEST A RAPID CHECK See Chapter 8 Functional Check Procedures 9 Enter Diagnostic mode check 1 and observe the baseline voltages when the monitor is drawing in room air The voltages of CO low should be within l V 10 Perform TEST G LEAKAGE TEST 11 Perform TEST F SAMPLE FLOW TEST 12 Perform pressure calibration 13 Perform gas calibration Gas calibration is performed properly when the monitor has been on for more than 30 minutes and is warmed up At gas calibration the ambient CO level must be more than 0 03 If not the CO absorber be saturated 14 Perform TEST C BASELINE TESTS The difference between the maximum and the minimum values during 30 minutes should be within 25 ml min for CO and 35 ml min for O after the highest and the lowest five values are discarded Set the baselines and write the values on the rear panel sticker 15 Check RQ with the alcohol burning test kit see appendix of this manual Alcohol Burning Test Kit 16 Measure flow constant see section 7 7 The difference between the maximum and the minimum values during 30 minutes should be within 25
100. s MERSUREHENT OFF UT ALARM OFF 13 07 00 00 00 a Gas If auto is chosen in Gas Set up the monitor performs automatic gas calibration The installed cal gas can is sufficient for about 30 calibrations If the can is empty a message Bottle empty appears If manual is chosen follow instructions on the screen and feed calibration gas externally NOTE Perform gas calibration at least once a day For optimum accuracy we recommend the calibration to be done before each measurement b Pressure The monitor measures ambient air pressure and displays it Adjust it to match the value measured by separate barometer NOTE Perform pressure calibration at least once every six months The gas calibration should be done after every pressure calibration March Ist 1993 200 DELTATRAC II SERVICE MANUAL 6 13 c Gas Set up In Gas Set up automatic or manual calibration and concentrations of calibration gas are selected To exit Diagnostic mode press NORMAL SCREEN twice NOTE The oxygen signal is the differential signal when no gases are injected the reading should be close to zero When 100 O is injected the reading should be close to 79 100 21 NOTE The LOW signal is equal to the signal but the resolution is better and the range is smaller This signal is read in through analog channel on the mother board NOTE During the measurement and calibration
101. sistor Changing the value of R51 will increase decrease the flow constant about 4 5 to 5 0 l min Rear panel parts Dust filter 880832 Fan 870641 Flow control wheel 882557 Flow control wheel base 882556 Flow control wheel O ring 65370 Loudspeaker 51449 Gas temperature probe 874529 Flow generator 874535 March 1st 1993 200 DELTATRAC SERVICE MANUAL Mixing chamber parts Mixing chamber Mixing chamber panel ENG Mixing chamber panel GER Mixing chamber panel FRE Mixing chamber handle Mixing chamber drain plug Microswitch for mixing chamber Auto calibration box parts Auto cal box side panel left Auto cal box side panel right Front panel Bottom plate Rear plate Top cover Front panel sticker Magnetic valve Tube connector on top of mag valve Cal gas can reusable gas valve unit Can support block upper base Can support block upper extension Cushion 9 4 874530 881352 881920 881925 66455 874500 52653 882544 881526 881553 881524 881525 881523 881903 882625 640640 882624 881522 881521 65503 If the magnetic valve is replaced use sealing tape to avoid leakage when reconnecting threaded ports 9 2 Service Accessories Item description Extension board lifts the board above the stack of boards to allow measurements Alcohol burning test kit Measuring chamber cleaning fluid Order No 872930 882908 85969 March 151 1993 9 5 200
102. st 1993 WARNING The plug must be connected when the monitor is used in the canopy mode a b 200 DELTATRAC II SERVICE MANUAL Figures 4 1 Different Modes a Canopy mode in room air b Canopy mode in supplementary oxygen c Respirator mode setups 4 4 March 151 1993 MBM 200 DELTATRAC II SERVICE MANUAL 4 5 4 3 General Block Diagram The simplified block diagram in Figure 4 2 shows the electrical configuration and the interconnection of different parts of the monitor The operation of the monitor is controlled by the CPU board consisting of processor RAM EPROM and analog multiplexers A D and D A converters to read in and send analog voltages and components to interface with the external bus and keyboard The gas concentrations are determined using infrared techniques for CO measurement CO measuring unit and measuring board and a paramagnetic sensor for measurement The gases are multiplexed to the gas transducers with magnetic valves in the gas sampling control module The valve drivers are located on the valve control board and the measuring sequence is controlled by the CPU In addition the valve control board consists of the loud speaker driver an O amplifier for measuring small oxygen differences and a temperature amplifier for measuring the gas temperature at the output of the constant flow generator The valve control CO measuri
103. ted by insulating and folding the unused primary leads inside the additional insulation tube The mains transformer is magnetically shielded to minimize screen disturbance The power supply board contains basically four DC sources refer to Figure 6 20 5 V switched for the digital circuitry 15 V switched for valves pump and other components 15 V regulated for the analog amplifiers Data retention voltage generation circuit supplies 5 DRV voltage for memory from switched 15 V supply Also 12 A for the CRT unit and serial drivers receivers is derived from the 15 V switched voltage The 12 V for the serial I O 1s derived from 15 V In addition to the power supply functions the board contains drivers for two serial channels including the modem control signals CTS and RTS a RESET control which generates a 200 ms reset pulse to the CPU if the 5 V line goes below 4 75 V and miscellaneous I O functions like a loudspeaker driver Some signals from the mother board are passed directly to the rear panel connectors March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 20 5 8 Mother Board Keyboard The mother board contains the system bus interconnections and connectors Also on the board are buffers for analog input signals Al refer to Figure 6 19 and a transzorb zener V5 to protect digital electronics for possible overvoltage in the 5 V supply The mother board bus pin connections are in Tabl
104. the unit serial number full type designation program revision displayed at monitor startup and a detailed fault description NOTE After any component replacements see Section 7 1 Adjustments and after any service perform the functional field check procedure in Chapter 8 CAUTION The tests and repairs outlined in this section should only be attempted by trained personnel with the appropriate equipment Unauthorized service may void warranty of the unit March Ist 1993 200 DELTATRAC SERVICE MANUAL 6 2 6 2 Disassembly and Reassembly CAUTION To prevent collapse of the monitor assembly the mixing chamber has to be in place or the monitor lying on its side when auto calibration box and right side panel or rear panel are removed CAUTION When assembling or disassembling any part inside the monitor be careful not to kink or damage the gas sampling tubes Leakages in the gas sampling system affect accuracy of measurement and are difficult to detect For the monitor parts locations see Figure 9 1 the wiring diagram is in Section 4 4 Top covers Top cover of the auto calibration box can be lifted off by removing two screws in the left side panel Then the top cover of the main monitor can be detached by removing four screws Auto calibration box can be detached by first removing the left side panel and then removing four screws at the lower half of the right side panel of the box The CO measuring un
105. to calculate that 1 gram of ethanol will produce 0 973 liters of The density of ethanol is 0 78522 g mL at 25 A dose of 5 mL of pure 100 90 ethanol will produce 3820 mL of CO If pure ethanol is not available it is possible to use different mixtures as the following examples show Example 1 Lower ethanol concentration If the ethanol concentration is e g 96 volume 6 and the rest is essentially water 5 mL of this mixture will produce 96 x 3820 mL 3667 mL CO STPD 100 NOTE Normally the best ethanol grade available is 99 5 vol and the corresponding CO production for a dose of 5 mL is 3801 mL STPD Example 2 Denatured alcohol A mixture containing 96 volume ethanol and 4 water is denatured with 30 mL of Isobuthanol per liter How much CO will be produced when 5 mL of this mixture is oxidized The ethanol in this mixture will produce 0 97 x 0 96 x 3820 mL 3557 mL CO STPD Isobuthanol 15 oxidized as follows 2 13 10 H O 8 CO Using this reaction and the atomic weights given above it can be calculated that 1 g of Isobuthanol will produce 1 210 L of CO STPD The density of Isobuthanol is 0 81 g mL amount of Isobuthanol in the denatured mixture is 0 15 mL When oxidized an amount of 147 mL of CO STPD is produced The total CO production when 5 mL of the denatured alcohol 15 burned 15 3557 mL 147 mL 3704 mL 2 ALCOHOL BURNING KIT The test k
106. tor run for at least 30 minutes to warm up Connect a printer If the ambient pressure is known accurately perform pressure calibration Perform gas calibration carefully Select the following settings a Clear possible old results by pressing END b CANOPY mode Press CHANGE MODE key if necessary Averaging OFF in Setup menu d Artifact suppression OFF in Setup menu e Numeric printer output in Setup menu Prepare a test setup as shown in Figure 2 Light up the alcohol burner filled with alcohol Start the measurement by pressing START key Continue the test for at least 30 min The average value for the last 15 min should be within 0 64 and 0 69 SAMPLINGTUBE CANOPY HOSE Figure 2 Alcohol Burning Test Setup 4 FLOW CALIBRATION Read the instructions thoroughly before starting the flow calibration It is recommended that once the calibration has been made it should be confirmed by repeating the test Do the preparations described in steps 1 to 4 of Chapter 3 RQ TEST Prepare a test setup as shown in Figure 2 However the alcohol burner is replaced with the burner vessel Using the pipette of the test kit fill the alcohol burner vessel with 5 mL of ethanol NOTE Care must be taken when using the pipette no air bubbles are allowed to enter the pipette The calibration is only as accurate as the dose of alcohol Start the measurement by pressing
107. tube are to be replaced 6 19 Table 6 3 Sampling SystemParts List Special internal sample tube Small damping chamber filter Dust filter Damping chamber L piece T piece 878853 878802 86901 57150 733811 733821 March 13 1993 200 DELTATRAC SERVICE MANUAL 6 20 Table 6 4 Flow Constriction Cassettes Flow cassette 50 26 0 878048 50 19 0 873800 50 16 3 878047 50 15 3 873801 50 14 1 878046 50 13 1 873802 50 12 4 878045 50 11 2 874770 50 10 4 873803 50 9 2 874509 50 8 7 873804 50 7 4 873805 50 6 5 878044 50 5 8 873806 50 5 1 878043 50 4 4 873807 50 3 8 878042 50 3 2 873808 50 3 0 878040 50 2 8 878039 50 2 5 878038 50 2 3 873809 50 2 0 878037 50 1 8 873810 50 1 6 878036 50 1 4 873811 50 1 1 873812 NOTE The latter number is a relative figure for flow through the cassette e g 50 26 0 is the smallest resistance and 50 1 1 the largest March 1st 1993 200 DELTATRAC II SERVICE MANUAL 6 21 Figure 6 6 Sampling System Schematic Diagram and Parts Layout NOTE To gain best performance the flow cassettes are selected individually for each monitor at the factory In case they are to be replaced see Table 6 5 for alternatives CALIBRATION MIXING CHAMBER GAS DUST FILTER FLOW 1 GENERATOR X ABSORBER FLOW SELECTOR WATER DUST WHEEL TRAP FILTER PRESSURE TRANSDUCER SAMPLE PUMP
108. uring chamber finally it is blocked completely After passing through the filters the light is reflected and focused by a mirror onto the infrared detector This detector measures the three light levels The detector block is mounted on the preamplifier board see 5 2 3 There is an optical sensor incorporated in the photometer which detects light from a reflective surface on the filter wheel once every revolution The pulses from this sensor are used to synchronize the electronics to the signal from the infrared detector A stabilizing diode measures the temperature which is needed to compensate for thermal drifts The infrared detector the optical sensor and the stabilizing diode are mounted on the preamplifier board March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 7 Figure 5 4 Photometer Note When disassembling M the photometer the focusing mirror has to be removed e before lifting off the chopper motor in order to avoid damaging the chopper kii wheel CO absorber box O ring Synchronizing board Optical sensor Q ring Chopper wheel Optical filter Synchronizing a y eel _ _ IR detector block Preamplifier board mark O ring Window plate Measuring o ring NR lamp unit March 1st 1993 200 DELTATRAC II SERVICE MANUAL 5 8 5 2 3 Preamplifier The schematic diagram and parts layout of
109. w generator CO from sampling line CO through absorber every 32 min measurement O from sampling line from air O from flow generator Sampling line occlusion NOTE O reference is always connected to the sampling line February Ist 1994 1 200 DELTATRAC II SERVICE MANUAL 6 18 Figure 6 5 Respirator Mode Measuring Sequence Lain Imin 1 amp 6 6 69 6660090 Table 6 2 Sample Sources at Different Phases of Respirator Mode Measurement PHASE SAMPLE SOURCE ENERGIZED VALVES measurement A CO from flow generator B CO from mixing chamber Y5 C CO from air 10 15 20 min from start and then every 10 min Y2 Y6 Absorber 5 30 min from start then every 30 min 6 O measurement D O from sampling line E O from air Y8 O from mixing chamber 5 10 15 20 min from start then every 10 min Y4 Sampling line occlusion Y7 NOTE reference is always connected to the mixing chamber February 13 1994 1 200 DELTATRAC II SERVICE MANUAL 6 3 5 1 Sampling System Parts NOTE Six different tubes are used inside the monitor When ordering independent tubes please specify the size and length needed NOTE Because of complicated tube connection in the sampling system it is recommended to replace the whole internal sampling system including magnetic valves see the order code in spare parts list when more than one
110. zorb zener V6 V23 and blows the secondary fuses F3 and 4 March 151 1993 661 SI YEW Check DC voltages 5 V 15 V 412 V switched linear If both switched voltages are missing check voltage reference A2 and 13 as well as the 426 V raw voltage Check 15 switching regulator and AS Check switching regulator wave forms figure 2 11 to locate faulty component Note FET V8 or is shorted it usually shorts also the blows the secondary fuses F3 and F4 15 V 15 V linear Check A6 and A7 12 V linear Check 15 V linear supply and diodes V25 to V28 Transzorb zener V6 V23 and all malfunctioning Check secondary fuses F3 and F4 rectifier V35 Secondary fuses repeatedly blowing Check electronics for short circuits check and 5 motherboard p eog Ajddng 1119 aand q II IDVALVLTIG 00 0 9 3 A1 3 43 12 13 A1 12 13 A3 V10 V22 collector V4 V15 collector 8 11 gate v8 V11 source Output MBM 200 DELTATRAC II SERVICE MANUAL 6 41 Figure 6 18 Switching Regulator Wave Forms OV 0 65 0 75V 0 1 0 2V OV 39 50V 0 005V 40 60V 19 30V 38 48V 0 5V Varies with loading 0 4V L uf ac Ripple voltage on the DC voltage

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