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S/5 Hemodynamic modules

Document No. 800 1008-2

Pulse oximetry measurement section

LED driving circuit

Amplifier

G = 275

IR DC level

Red DC level

Probe

G =1/4096-1

I=5-350mA

Level of LED current
measurement and
feedback circuit

Preamplifier
Current - to - Voltage
converter

Digitally controlled
attenuator

IRed LED intensity
adjustment

Red LED intensity
adjustment

Level of LED current indication (to CPU)

IRed AC signal

Red AC signal

Two step
AC amplifier

G =16
or 63

for NESTPR
G =18
or 125

G =16
or 63

Figure 11

Pulse oximetry measurement block diagram

LED control signals

The processor sends pulse width modulated signals, IRED intensity and RED intensity, which are

converted to DC voltage and filtered. By switches either RED or IRED intensity is sent forward to

amplifier in LED driving circuit.

LED driving circuit

Voltage difference which corresponds to LED current, is measured by the differential amplifier

circuit and its output is sent back to the processor in 0 to 5 V level. There are feedback circuits from

LED current measurement and LED intensity control.
Background light is measured by picking up a sample from the signal. The sample is modified to 0

to 5 V level and sent to the processor.

Measured signal preamplification

Preamplifier is current-to-voltage converter with gain selection. The higher gain is used for

measuring of thin tissue.

Digitally controlled amplifier

D/A converter is a digitally controlled amplifier after which there is another constant amplifier.

Содержание S/5 M-NE12STPR

Страница 1: ...TM ESTR Module M ESTR rev 04 S 5TM ETPR Module M ETPR rev 04 Technical Reference Manual Slot All specifications are subject to change without notice Document No 800 1008 2 June 2001 Datex Ohmeda Inc 3...

Страница 2: ......

Страница 3: ...1 3 6 Respiration 6 2 Functional Description 7 2 1 Measurement principle 7 2 1 1 NIBP 7 2 1 2 ECG 7 2 1 3 Pulse oximetry 7 2 1 4 Temperature 9 2 1 5 Invasive blood pressure 10 2 1 6 Respiration 10 2...

Страница 4: ...dule troubleshooting 52 5 Service Menu 53 5 1 NIBP service menu 54 5 1 1 NIBP demo menu 55 5 1 2 NIBP calibration menu 56 5 1 3 NIBP safety valve menu 57 5 1 4 NIBP pulse valve menu 58 5 1 5 NIBP butt...

Страница 5: ...e 4 Front panel of M NESTPR 11 Figure 5 NIBP board functional block diagram 12 Figure 6 3 and 5 lead ECG board block diagram 14 Figure 7 12 lead ECG measurement block diagram 16 Figure 8 STP board blo...

Страница 6: ...Datex Ohmeda S 5 monitors Document No 800 1008 2 iv This page intentionally left blank...

Страница 7: ...ETPR are double width modules designed for use with S 5 monitors The modules provide general hemodynamic parameters Later in this manual modules can be called w o system name S 5 NOTE Do not use ident...

Страница 8: ...1 kg Power consumption about 9 W 1 2 Typical performance 1 2 1 NIBP Oscillometric measurement principle Measurement range adult 25 260 mmHg child 25 195 mmHg infant 15 145 mmHg Pulse rate range accept...

Страница 9: ...in software ST level range 9 9 mm 0 9 0 9 mV Resolution 0 1 mm 0 01 mV Averaging calculated from 8 QRS SYNCHRONIZATION Direct ECG analog output of ECG 1 V 1 mV Pacer 5 V and 0 5 2 5 ms pulse 30 ms aft...

Страница 10: ...nvasive blood pressure Measurement range 40 320 mmHg Measurement accuracy 2 mmHg or 5 Zero adjustment range 150 mmHg Calibration range 20 Scales upper limit is adjustable between 10 and 300 mmHg in st...

Страница 11: ...nute 5 seconds in infant mode Zeroing to ambient pressure is done automatically Inflation pressure is adjusted according to the previous systolic pressure typically 40 mmHg above If the systolic press...

Страница 12: ...s have respiration artifact rejection Accuracy 5 or 2 mmHg whichever is greater Transducer and input sensitivity 5 V V mmHg 5 VDC 20 mA max current Filter 0 4 22 Hz adjustable Zero set accuracy 1 mmHg...

Страница 13: ...l potential produced with electrodes placed on the surface of the body ECG reflects electrical activity of the heart normal abnormal function of the heart effects of anesthesia on heart function effec...

Страница 14: ...d is that the accuracy of SpO2 measurement relative to SaO2func can be maintained even at rather high concentrations of carboxyhemoglobin in blood Independent of the calibration method pulse oximeter...

Страница 15: ...ded volume of arterial blood Arterial blood Venous blood Tissue Time Incident light 2 GND I I Figure 2 Absorption of infrared light in the finger probe parts layout and schematic diagram 2 1 4 Tempera...

Страница 16: ...heart and is electrically zeroed The transducer is a piezo resistive device that converts the pressure signal to a voltage The monitor interprets the voltage signal so that pressure data and pressure...

Страница 17: ...have separate T and SP input boards 2 2 2 M NE12STPR NE12STR NE12TPR NESTPR NESTR NETPR modules Figure 4 Front panel of M NESTPR The M NESTPR M NETPR and M NESTR modules contain three main PC boards t...

Страница 18: ...M NE12STR is similar except the ECG board and ECG input board are different 2 2 3 NIBP board ADDRESS DECODER POWER UP RESET CPU 80C51FA RS485 INTERF ADDRESS LATCH RAM INTERNAL WATCHDOG EEPROM Calib r...

Страница 19: ...reset See the section in ECG board s description RS485 communication Watchdog timer The NIBP board is equipped with software independent safety circuit to disconnect supply voltages from the pump and...

Страница 20: ...ER SOURCE DIRECT ECG OPTO COUPLER POWER SOURCE PATIENT OVERLOAD PROTECTION ANALOG SWITCHES to STP Board ISOLATION uP uP uP SUPPLY VOLTAGES HP Filter uP HP Filter uP HP Filter uP SLEW RATE DETECTOR ANT...

Страница 21: ...er consists of the analog switches which are used for detecting the respiration signal from 31 kHz amplitude modulated raw signal The amplifier stage consists of the differential amplifier and the las...

Страница 22: ...ard for voltages 5 VREF 5 V 12 V GND and 12 V 2 2 5 ECG board in 12 lead measurement The 12 lead ECG measurement consists of the functions which are shown in the figure 7 All functions are located in...

Страница 23: ...rential amplifiers ECG amplifiers and baseline restoration The function of the ECG amplifiers and baseline restoration is to amplify the signal and to restore the baseline of the signal in the middle...

Страница 24: ...Hz with 60 Hz reject filter The purpose of filtering is to reduce high frequency noise and low frequency e g respiratory movement artifacts Monitor filter is used in normal monitoring Diagnostic filt...

Страница 25: ...n section Power non isolation section AD converter 8 chn 12 bit IRed measuring RS485 Driver for module reset RS485 Driver for data Power reset Pox LEDs driver Front panel keys Patient isolation transf...

Страница 26: ...ature measurement principle Invasive blood pressure measurement unit Isolated 5 V voltage is supplied to the pressure transducer From the bridge connection a differential voltage which depends on pres...

Страница 27: ...ED intensity which are converted to DC voltage and filtered By switches either RED or IRED intensity is sent forward to amplifier in LED driving circuit LED driving circuit Voltage difference which co...

Страница 28: ...additionally there is an auxiliary logic power reset which keeps the reset active for about 500 ms despite the state of reset in the module bus Time constant determines the power up reset time There a...

Страница 29: ...ignal is processed on logical high low level even though the outputs of the opto isolators are analog signals in the isolated section Reset line is an open collector type with a pull up resistor Thus...

Страница 30: ...No I O Signal Note 1 I RESET_RS485 2 I 15 VDC 3 I 15 VDIRTY 4 I 15 VDC 5 I O DATA_RS485 6 I O DATA_RS485 7 Ground Shield 8 I RESET_RS485 9 I CTSB 10 O RTSB 11 I RXDB 12 O TXDB 13 Ground Shield 14 I 3...

Страница 31: ...re connectors P1 P2 6 8 9 0 1 2 4 5 7 3 6 8 9 0 1 2 4 5 7 3 6 8 9 0 1 2 4 5 7 3 Pin No Signal Pin No Signal Pin No Signal 1 Right arm electrode R 1 Feedback resistor 1 Pressure 2 Left arm electrode L...

Страница 32: ...floating 1 GND 6 5 Vanalog 10 GND floating 1 2 5 Vdig 12 lead ECG board component side NIBP board There are test pad blocks on solder side X8 and X6 pads and voltages are X7 X8 X5 X6 X8 1 2 9 10 X6 1...

Страница 33: ...pin blocks identical both on STP and ECG boards Pins and voltages are as follows ESTPR X11 pin 1 5 Vref pin 2 5 V pin 3 12 V pin 4 Gnd pin 5 12 V X12 pin 1 5 V STP board only X11 X12 NESTPR X11 pin 1...

Страница 34: ...vice check The service check is recommended to be performed after any service repair however the service check procedures can be used also for determining possible failures The procedures should be pe...

Страница 35: ...2 Check external parts the front cover and the front panel sticker are intact all connectors are intact and are attached properly the module box the latch and the spring pin are intact 3 Replace the...

Страница 36: ...ale Auto ECG measurement 6 Enter the service menu Monitor Setup Install Service password 16 4 34 Service password 26 23 8 Parameters Take down the information regarding module software by selecting Sc...

Страница 37: ...es show OFF in the service menu and the message Leads Off is shown on the screen Connect all the leads together for example to a suitable screwdriver Check that all the electrodes show ON and the mess...

Страница 38: ...t simulator The settings and checks with Dynatech Nevada MedSim 300 Patient Simulator BASELINE IMPEDANCE switch 500 LEAD SELECT switch II RL LL RESP WAVE NORM RATE 20 OHMS 1 0 RATIO 1 1 APNEA OFF SHIF...

Страница 39: ...ccording to the instructions in the chapter 3 4 3 Temperature calibration 18 Activate the temperature test by selecting Temp Test from the menu and pressing the ComWheel twice When the message Perform...

Страница 40: ...2 to the module connectors P1 and P2 Zero the InvBP channels by pressing the keys ZERO P1 and ZERO P2 on the module front panel BP 1 WAVE ART 2 WAVE CVP Check that appropriate InvBP waveforms are show...

Страница 41: ...he NIBP menu Connect a pressure manometer to the NIBP module cuff connector Select Start Pump and press the ComWheel Check that the pump turns on and the pressure inside the tubing system starts to in...

Страница 42: ...s B1 and B2 The values should be within 10 mmHg Connect the pressure manometer to the cuff connector and check the calibration with pressures 100 mmHg 200 mmHg and 260 mmHg The zero offset value must...

Страница 43: ...some round object for example a calibration gas bottle Highlight Start Test Start the adult safety valve test by pressing the ComWheel Wait until the pump stops and the pressure is deflated Check the...

Страница 44: ...Screen 36 Keep the cuff on your arm and perform one NIBP measurement Check that the module gives a reasonable measuring result 37 Connect an infant cuff to cuff connector and wrap it around your finge...

Страница 45: ...STR NETPR modules Disassemble the M NE12STPR NE12STR NE12TPR NESTPR NESTR NETPR module in the following way See the exploded view of the module in 6 1 12 1 Remove the two screws from the back of the m...

Страница 46: ...he electronics of NIBP pressure measurement is calibrated at the factory Zeroing pressure is automatically maintained by the processor If the zero point of the pressure transducer drifts more than spe...

Страница 47: ...calibration Turn the switch to the right by for example a sharp pencil This enables menu selection Protection The message Calibration switch ON appears B Select Protection OFF in the Calibration menu...

Страница 48: ...calibration plug 25 C into T1 T2 connector 6 Press the ComWheel 7 Insert calibration plug 45 C into T1 T2 connector 8 Press the ComWheel 9 Press in the protect button at the bottom of the module and...

Страница 49: ...rement due to patient movements or shivering Weak pulsation message Weak or unstable oscillation pulses due to artifacts accurate diastolic pressure difficult to measure marked arrhythmia marked drop...

Страница 50: ...urements check cuff positioning Air leakage message 1 Hose or cuff leaking Reasons 1 Replace cuff cuff damaged replace cuff cuff connector damaged replace cuff connector if the fault is in hose connec...

Страница 51: ...t in pressure transducer replace the NIBP board fault in A D converter replace the NIBP board faulty calibration check calibration missing voltages recalibrate Calibration switch on message EEPROM pro...

Страница 52: ...the left at the bottom of the module 5 Calibration not protected only with S STD93 Protect calibration by selecting Protection ON in the NIBP calibration menu 6 ADC error ADC circuit failure Change N...

Страница 53: ...s of fat Improper skin preparation Remove body hair Clean attachment site carefully with alcohol Improper bandwidth filter Check filter No ECG trace Waveform not selected on screen Press the Monitor S...

Страница 54: ...d Message FAULTY PROBE Probe is faulty Change the probe No SpO2 No waveform selected on screen Check selected SpO2 waveforms by pressing Monitor Setup key and selecting Modify waveforms Wrong configur...

Страница 55: ...number field Possibly due to pulsating pressure waveform Open the transducer to air and zero the channel Offset is 150 mmHg Open the transducer to air and zero the channel Defective transducer Replac...

Страница 56: ...able resp waveform Poor electrode or poor electrode skin contact Electrodes from different manufacturers are used Too much little gel is used Poor electrode condition Electrodes are dried out Improper...

Страница 57: ...e slot Error message on screen See error code explanation in Service Manual and fix it Do they work Check tubes and connectors Find leak and fix it Check keyboard connector If OK change front panel Ch...

Страница 58: ...n same slot ECG module ID on screen Check front panel key functions in Service menu Do they work Check front panel unit ECG board and STP board to find culprit Replace if necessary Remove ECG board ST...

Страница 59: ...1008 2 53 5 SERVICE MENU 1 Press the Monitor Setup key 2 Select Install Service password 16 4 34 3 Select Service password 26 23 8 4 Select Parameters NIBP NOTE Parameter values in Service Data fields...

Страница 60: ...nd valves It exists ON or not OFF depending on service menu function The supply voltage can be turned on by selecting the previous Menu and then the desired menu again AD0 to AD7 show the values of ea...

Страница 61: ...ment The menu shows the realtime pressure signals that are measured from the NIBP cuff The measurement result is shown in the adjoining digit field Wave Recording Wave Recording is for selecting the r...

Страница 62: ...on ON OFF Select OFF when calibrating Protection can be set to ON or OFF only when the toggle switch at the bottom of the module is set to the right Calibration Calibration selection is available only...

Страница 63: ...ty valve menu Start Test Start test is for starting and Stop test is for stopping the Safety Valve test Safety Valve Data See NIBP Service menu in chapter 5 1 for information on general items Pressure...

Страница 64: ...e module counts the time it takes for the pressure to go down from 240 mmHg to 50 mmHg and displays it on the screen The test can be manually stopped by selecting Stop test The valve can be adjusted b...

Страница 65: ...F have no effect on the module Buttons Leds Data See NIBP Service menu in chapter 5 1 for information on general items Pressure Zero Protect handle Calibr prot 15 V power AD0 to AD7 as well as Timeout...

Страница 66: ...zero the time on the display Pneumatics Data field See NIBP service menu in chapter 5 1 for information on general items Pressure Zero Protect handle Calibr prot 15 V power AD0 to AD7 as well as Timeo...

Страница 67: ...ping the test Watchdog Data field See NIBP Service menu in chapter 5 1 for information on general items Pressure Zero Protect handle Calibr prot 15 V power AD0 to AD7 as well as Timeouts etc Watchdog...

Страница 68: ...alues is OFF when 3 lead cable is used All three values are OFF when 5 lead cable is used Quick zero also takes place when lead is changed in 3 lead measurement NE12STPR Quick zero is on if any of the...

Страница 69: ...s counting these items at power up and resets to zero at power off The nonzero values do not indicate a failure but the continuous counting more than 50 per second indicates either serial communicatio...

Страница 70: ...equency artefacts caused by electrosurgery unit but catches the slow changes in ST segment The ST filter is more susceptible to baseline wander than the monitor filter Pacemaker Selects how to display...

Страница 71: ...s outside the ranges Cable shows ON when a corresponding cable is connected to the front panel and Probe shows ON when a corresponding probe is connected to the cable Under Value the measured numeric...

Страница 72: ...on Menu Configuration shows the chosen module configuration TP ST or STP Timeouts is a cumulative number that indicates how many times the module has not responded to the monitor s inquiry Bad checksu...

Страница 73: ...calibration requires accurate test plugs of value 25 C and 45 C Calibration 1 Select Calibrate T1 Calibrate T2 2 Insert the test plug 25 C into the T1 T2 connector 3 Press the ComWheel 4 Insert the t...

Страница 74: ...ndation for stock 6 1 1 M ESTP rev 01 M ETP rev 00 M EST rev 00 1 2 3 5 4 13 7 6 14 8 16 17 15 10 11 Item Item description Order no Membrane keypad 879374 1 Module box wide 886168 2 Spring pin 879182...

Страница 75: ...ard M ESTP rev 03 883119 Use 888957 2 883806 6 1 4 M ESTP rev 04 M ETP rev 03 M EST rev 03 Item Item description Order no ECG software 883806 D4 STP software 884342 7 ECG board M ESTP rev 04 886748 Us...

Страница 76: ...12 628700 15 T input connectors M ESTP rev 04 05 887152 16 EMC cover 884099 17 EMC cover 886818 6 1 7 M ESTPR rev 02 M ETPR rev 02 M ESTR rev 02 Item Item description Order no 7 ECG RESP board M ESTPR...

Страница 77: ...20 Fitting plate 879510 7 NIBP board M NESTPR rev 00 887520 23 Membrane keypad 888242 8 EMC cover 892305 24 Front panel unit M NESTPR M NESTR M NETPR 888273 891748 891772 9 NIBP pump M NESTPR 889993 2...

Страница 78: ...board 8002574 includes the STP software 8000717 6 1 12 M NE12STPR rev 00 M NE12STR rev 00 M NE12TPR rev 00 Item Item description Order no 4 ECG board 894284 18 ECG input board 896913 24 Front panel un...

Страница 79: ...8 FR 880158 880429 880140 Adaptation M ESTP rev 02 Order No M ETP rev 01 Order No M EST rev 01 Order No DE 881955 881958 881961 EN 881953 881956 881959 ES 884200 885043 885044 FR 881954 881957 881960...

Страница 80: ...709 897613 897646 EN 896985 896986 896987 ES 897712 897616 897649 FI 897715 897619 897652 FR 897710 897614 897647 IT 897713 897617 897650 JA 897719 897623 897656 NL 897711 897615 897648 NO 897717 8976...

Страница 81: ...8486 898452 FI 898426 898489 898455 FR 898421 898484 898450 IT 898424 898487 898453 JA 898430 8000380 898459 NL 898422 898485 898451 NO 898428 898491 898457 PT 898425 898488 898454 SV 898427 898490 89...

Страница 82: ...n 02 Service Manual p n 882580 ETP and EST Modules revision 01 Service Manual p n 882580 ESTP Module revision 03 04 and ETP and EST Modules revision 02 03 Technical Reference Manual Slot 896620 1 Main...

Страница 83: ...APPENDIX A Service check form S 5 Hemodynamic modules Document No 800 1008 2 77 APPENDIX A...

Страница 84: ...Datex Ohmeda S 5 monitors Document No 800 1008 2 78 This page intentionally left blank...

Страница 85: ...st not applicable Fail Test Failed All modules OK N A Fail OK N A Fail 1 Internal parts 2 External parts 3 NIBP pump filter 4 Installation 5 Recognition Notes ECG measurement S N 6 Module software ser...

Страница 86: ...ail OK N A Fail 15 Communication and memories 16 Temperature probe detection 17 Calibration check 18 Temp test function 19 Configuration STP ST TP Notes InvBP measurement S N OK N A Fail OK N A Fail 2...

Страница 87: ...mHg 100 z o 2 mmHg 200 mmHg 200 z o 3 mmHg 260 mmHg 260 z o 4 mmHg z o zero offset at 0 mmHg pressure 31 Watchdog timer activation pressure 5 10 mmHg 32 Watchdog timer Adult 120 140 s Infant 60 70 s 3...

Страница 88: ...eda S 5 monitors A 4 4 Document No 8001008 2 All modules OK N A Fail OK N A Fail 38 Electrical safety check 39 Functioning after electrical safety check 40 Final cleaning Notes Notes Used Spare Parts...

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