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Service Manual Model 860 - Frank`s Hospital Workshop

1. MXZOCESS NOOO ODA OOOO OOOO AA T UDUUDUJUSGDUUDUUUUUDDUUUUUDEUUDUUU 2 4 i ees E Front Ground T m aa 2228 as End reference OC EXT a LILILI P d ESI mam ome WS I ul e IBI Nha sa TTG QO jj mL waj j s See 1 D Ld T zur uL Ld dut 4 u a E VA LRL AMA s em SOA e ecd ca ELLO r D J 2 e MEE S TRE Dep D 601 LH 4 a iu S CES f pare Qi e lal T 6221 4 uM is 1 4 1 1 4 Lr lli i Os ES e Wee VR1 9 C a 1 1 Q d ee n J108 16 19 224 108 12 a J108 10 Vback J MENS un nn n e d Ge O al m F O S Q P eee a jaja Wi swo m JE memes 40 TP5 TP4 TP3 FRONT 3 Power up the monitor while holding the ALERT RESET key This will cause the unit to power up to factory
2. LINE PART NO REV QPA DESCRIPTION 472255 2 RESISTOR 1 OHM 1 4W 1 METAL FILM 472268 1 RESISTOR 8 66K OHM 1 4W 1 METAL FILM 472281 1 RESISTOR 698K OHM 1 4W 1 473514 1 RESISTOR 100K OHM 1 4W 1 473529 1 RESISTOR 4 75K OHM 1 4W 1 473551 1 RESISTOR 20K OHM 1 4W 1 473563 1 RESISTOR 33 2K OHM 1 4W 1 25PPM METAL 473564 1 RESISTOR 1 72K OHM 1 4W 1 50PPM METAL 474006 1 RESISTOR 20 OHM 2W 5 METAL OXIDE 474032 2 RESISTOR 10 OHM 1 2W 5 CARBON 474089 2 RESISTOR PACK 100K OHM 2 8 RES 9 PIN 474091 RESISTOR PACK 10K OHM 2 9 RES 10 PIN 474098 3 RESISTOR PACK 100K 2 5 RESISTORS 10 PIN 474100 1 RESISTOR PACK 1K 2 5 RESISTORS 10 PIN 474101 3 RESISTOR PACK 10K 2 5 RESISTORS 10 PIN 474132 1 RESISTOR PACK 41K OHM 2 4 ISOL RES 8 PIN 474135 1 RES PACK 100 OHM 2 5 ISOL RES 10 PIN 475001 1 POT CERMET 200 OHM TOP 475005 2 POT CERMET 1K OHM TOP 475034 POTENTIOMETER 2K OHM 10 1 TURN TOP ADJ 481000 2 DIODE ZENER ICL8069CCSQ 1 2 V REF 481501 7 DIODE 1N4148 SIGNAL SILICON HIGH SPEED 481534 1 DIODE BAT82 SCHOTTKY MINIATURE DO 34 PACK 481541 4 DIODE UF4002 100V 1A FAST RECOVERY 481542 1 DIODE UF5400 50V 3A FAST RECOVERY 483002 4 2N3906 PNP SILICON SWITCHING 483017 4 TRANSISTOR BC214C PNP SILICON 484010 2 NPN TRANSISTOR 2N3904 484523 1 VOLTAGE REGULATOR
3. Setting up the Calibrator To install calibration gas cylinders 1 Check the cylinder part number and label color against the part number and color identifier on the rear panel High Point Gas Cat No 8965 Yellow Low Point Gas Cat No 8964 Orange 2 Insert a Low Point Calibration Gas Cat NO 8964 cylinder into the appropriate opening at the rear of the calibrator Hand tighten the cylinder by rotating it in a clockwise direction until is firmly seated against the in the calibrator then 1 8 turn more The cylinder should turn easily If not remove and try again Do not force it 3 Install High Point Calibration Gas Cat NO 8965 cylinder in the same manner 4 Verify that both front panel pressure gages indicate pressures above zero 20 Model 860 Service Manual Rev 00 Battery Maintenance Maintenance 4 Disconnecting Gas Cylinders When the front panel pressure gauge reads 0 while a cylinder is connected the cylinder is empty and must be replaced Do not attempt to calibrate a sensor with an empty cylinder To remove a cylinder 1 Rotate the cylinder in a counter clockwise direction until free 2 Dispose of cylinder in accordance to local regulations CAUTION Do not attempt to refill empty cylinders or to dispose of in fire Refer to labeling on cylinder for proper handling and disposal Connect the calibrator Connect the calibrator to TCO5M by aligning the red dot
4. LINE PART NO REV QPA DESCRIPTION 0001 4645 01 04 2 REGULATOR ASSEMBLY 0002 6662 17 00 1 REAR PANEL SUBASSY 0003 6698 01 01 1 FRONT PANEL ASSY 0004 6704 13 01 1 BOTTOM COVER PAINTING 0005 6710 10 01 1 TANK SUPPORT ANGLE 0006 6761 16 00 1 ALERT LENS WHITE 0007 6785 10 00 1 REGULATOR PANEL 0008 6792 10 00 1 BULKHEAD SPACER REGULATOR PNL 0009 6633 04 01 0 TEST PROCEDURE REGULATOR MAIN ASSY 0016 161019 0 PIPE SEALANT 592 COLOR WHITE 0017 161092 0 ADHESIVE 262 THREADLOCKER HIGH STRENGTH Rev 00 Model 860 Service Manual 55 10 Parts Model 868 Calibrator LINE PART NO REV QPA DESCRIPTION 0018 240056 4 FOOT RUBBER 81 SQ X 3 HI W TAPER WHITE 0019 250042 2 BRASS REDUCER BUSHING 1 8 NPT TO 10 32 0020 250043 2 PRECISION FLOW RESTRICTOR TYPE L BRASS BARB 0021 250128 0 TUBING TEFZEL 093 ID X 125 OD 0022 250154 2 FITTING MALE ELBOW 1 8 OD TUBING TO 1 8 NPT 0023 280111 2 GASKET 1 8 I D X 19 64 O D X 020 THK BUN 0024 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 0025 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL ASSY 6698 01 01 FRONT PANEL ASSY MODEL 868 TC CALIBRATOR LINE PART NO REV QPA DESCRIPTION 0001 6695 10 01 1 PROBE NEST 0002 6696 10 00 1 KNOB PROBE NEST 0003 6697 10 01 1 SHAFT PROBE NEST 0004 6698 17 00 1 FRONT PANEL SUBASSY
5. Rev 00 Model 860 Rev 00 Parts 1 0 LINE PART NO REV QPA DESCRIPTION 472039 1 RESISTOR 15K OHM 1 4W 1 CARBON 472040 2 RESISTOR 16 2K OHM 1 4W 1 CARBON 472047 2 RESISTOR 40 2K OHM 1 4W 1 CARBON 472058 2 RESISTOR 100K OHM 1 4W 1 CARBON 472060 3 RESISTOR 121K OHM 1 4W 1 CARBON 472065 2 RESISTOR 200K OHM 1 4W 1 CARBON 472072 1 RESISTOR 475K OHM 1 4W 1 CARBON 472073 5 RESISTOR 499K OHM 1 4W 1 CARBON 472075 5 RESISTOR 1M OHM 1 4W 1 CARBON 472122 1 RESISTOR 130K OHM 1 4W 1 CARBON 472130 2 RESISTOR 324K OHM 1 4W 1 CARBON 472137 1 RESISTOR 562K OHM 1 4W 1 472140 1 RESISTOR 332K OHM 1 4W 1 472172 2 RESISTOR 133K OHM 1 4W 1 472186 1 RESISTOR 36 5K OHM 1 4W 1 472203 2 RESISTOR 7 5 OHM 1 4W 1 METAL FILM 472255 2 RESISTOR 1 OHM 1 4W 1 METAL FILM 472901 2 RESISTOR 50M OHM 3 4W 1 80 PPM C 473512 4 RESISTOR 10K OHM 1 4W 1 473515 3 RESISTOR 49 9K OHM 1 4W 1 473520 2 RESISTOR 39 2K OHM 1 4W 1 473526 2 RESISTOR 6 190K OHM 1 4W 1 473530 2 RESISTOR 4 22K OHM 1 4W 1 473551 1 RESISTOR 20K OHM 1 4W 1 474098 1 RESISTOR PACK 100K 2 5 RESISTORS 10 PIN 474101 1 RESISTOR PACK 10K 2 5 RESISTORS 10 PIN 475049 1 POTENTIOMETER 10K OHM 10 M TURN TOP ADJ 481501 10 DIODE 1N4148 SIGNAL SILIC
6. O2 LOW The measured value is below the lower limit setting CO2 HIGH The measured CO value is above the upper limit setting CO2 LOW The measured CO value is below the lower limit setting S TIMER EXPRD The site is enabled and the timer duration has expired gt 0 2 C The detected sensor temperature has exceeded the set temperature by more than 0 2 C 10 MIN SITE TIMER EXPIRED More than 10 minutes has passed since the site timer has timed out and it has not been reset sensor heaters are shut off ERROR BAROMETRIC The detected barometric pressure has exceeded the lower limit PRESSURE 540 mmHg ERROR BAROMETRIC The detected barometric pressure has exceeded the upper limit PRESSURE 800mmHg O2 LIM OFF The upper or lower alert limits for O have been disabled CO2 LIM OFF The upper or lower alert limits for CO have been disabled LIM S OFF Both and CO alert limits have been disabled 30 Mode 860 Service Manual Rev 00 Display Messages Rev 00 Troubleshooting 5 MONITOR MESSAGES BATTERY VERY LOW PLUG IN AC POWER SYMPTOMS CAUSES The monitor is running off of battery power and the battery has dis charged to an extremely low level too low for monitor operation MONITOR ERROR TEMPERATURE 45 5 C The detected sensor temperature has exceeded the 45 5 C maximum MONITOR ERROR THERMISTORS 0 5 C The detected temperatures from the senso
7. The MUXA MUXC lines from the analog to digital converter on the CPU Interface board selects one of the eight channels on the multiplexor IC6 The selected channel is then switched to the MUXOUT line for conversion The following signals are handled by the multiplexor IC6 Input Signal X0 Thermister 1 Signal X1 O2 Signal X2 Sensor ID X3 2 Signal X4 Thermister 2 Signal X5 LP signal X6 Battery Voltage X7 Barometric Pressure Model 860 Service Manual 17 3 Theory of Operation 2534 Front End Board This page intentionally blank 18 Model 860 Service Manual Rev 00 4 Maintenance This section contains the TCO M monitor and accessory maintenance information 4 1 Cleaning and Disinfecting 4 1 1 Monitor Calibrator Turn the monitor off and unplug from the AC mains before cleaning Disconnect the calibrator from the TCO M if connected before cleaning The monitor calibrator can be cleaned and disinfected with solutions such as 70 isopropyl alcohol 296 glutheralhyde or 1096 bleach Then wipe with a clean water dampened cloth to rinse Dry before use Do not immerse the monitor calibrator Do not attempt to sterilize the monitor calibrator 4 1 2 Sensors The sensor should be cleaned with a NOVADISK membrane in place It can be cleaned and disinfected with solutions such as isopropyl alcohol 70 solution 2 glutheralhyde solution or 10 bleach solution then wiped with a clean water dampened cloth to ri
8. 0005 6701 10 01 1 MOUNTING PLATE PRESSURE GAUGE 0006 6759 01 02 1 INPUT CABLE ASSY 0010 161019 0 PIPE SEALANT 592 COLOR WHITE 0011 250027 0 URETHANE HOSE BLUE 1 16 I D X 1 8 O D 0012 250057 2 SOLENOID VALVE REED TYPE 0013 250152 2 GAUGE 0 300 PSI ROUND PANEL MOUNT 0014 250153 2 BULKHEAD FITTING FEMALE 1 8 OD 1 8 NPT 0015 250156 1 FITTING TEE FOR 1 16 ID TUBING W 10 32 THD 0016 280000 0 SPACER HEX 4 THREADED X 1 2 LONG 0017 280081 1 O RING 551 ID X 070 BEAD SILICONE 0018 280229 1 SPRING COMPRESSION 18 OD X 5 L 02 DIA 0019 280230 1 RETAINING RING FOR 1 8 DIA SHAFT 0020 280231 0 STANDOFF 1 4 HEX X 1 3 8 L 4 40 FEMALE THD 0021 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 0022 284203 0 314 40 X 3 16 SLOTTED BINDING HEAD STEEL CAD 0023 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 0024 285049 4 LOCKWASHER INT TOOTH FOR 3 8 DIA SCR ZINC 0025 608001 0 CABLE TIE 094 X 3 62L SELF LKG 0026 608002 1 TY MOUNT ADHESIVE 3 4 X 3 4 0027 161075 0 ADHESIVE 430 FAST SETTING GENERAL PURPOSE 0028 161092 0 ADHESIVE 262 THREADLOCKER HIGH STRENGTH 0029 161091 0 ADHESIVE 425 FAST SETTING THREADLOCKER 56 Model 860 Service Manual Rev 00
9. 1 SP 215079 1 SOCKET 32 PIN DIP 1 PIN SP 6 ROW SP 216029 0 TEST POINT SPRING LOADED 475 DEG C MAXIMUM 230016 2 CRYSTAL 32 768K HZ 230018 1 CRYSTAL 12 288MHZ HC49U CASE 192 SPACING 2533 02 01 1 FAB CPU INTERFACE BOARD 2533 03 03 0 SCHEMATIC CPU INTERFACE BOARD 2533 04 01 0 TEST PROCEDURE CPU INTERFACE BD ASSY 400035 1 INVERTER DC TO AC 5VDC INPUT PC MOUNT 470016 1 RESISTOR 22 OHM 1 4W 10 CARBON 470111 3 RESISTOR 33 OHM 1 2W 10 METAL FILM 472003 2 RESISTOR 100 OHM 1 4W 1 CARBON 472007 6 RESISTOR 475 OHM 1 4W 1 CARBON 472008 2 RESISTOR 499 OHM 1 4W 1 CARBON 472011 4 RESISTOR 1K OHM 1 4W 1 CARBON 472021 1 RESISTOR 4 75K OHM 1 4W 1 CARBON 472030 11 RESISTOR 10K OHM 1 4W 1 CARBON 472034 1 RESISTOR 12 1K OHM 1 4W 1 CARBON 472039 2 RESISTOR 15K OHM 1 4W 1 CARBON 472041 2 RESISTOR 20K OHM 1 4W 1 CARBON 472045 1 RESISTOR 30 1K OHM 1 4W 1 CARBON 472047 1 RESISTOR 40 2K OHM 1 4W 1 CARBON 472058 3 RESISTOR 100K OHM 1 4W 1 CARBON 472081 3 RESISTOR 3 01K OHM 1 4W 1 CARBON 472089 3 RESISTOR 249K OHM 1 4W 1 CARBON 472121 1 RESISTOR 3 74K OHM 1 4W 1 CARBON 472127 1 RESISTOR 32 4K OHM 1 4W 1 CARBON 472146 1 RESISTOR 47 5K OHM 1 4W 1 472170 1 RESISTOR 22 1K OHM 1 4W 1 472227 1 RESISTOR 47 OHM 1 4W 1 METAL FILM 50 Model 860 Service Manual Rev 00 Model 860 Rev 00 Parts 1 0
10. Front End board off the CPU Interface board The boards are interconnected via the header strip P108 Make sure to keep the shield with the Front End board The Front End board is wired to the input connector J101 calibrator speaker 5 o power supply Front End Board CPU interface board input connector alert LEDs backlight keypanel display Keypanel assembly 3 The CPU interface board is secured to the rear panel by one screw that also secures the chassis ground connection Loosen and remove this screw then disconnect J109 speaker and J103 calibrator to slide the CPU interface board keypanel assembly out 4 The rear panel and power supply assembly and the battery can now be accessed Make sure Rev 00 the power supply shield is in place when reassembling the monitor Model 860 Service Manual 4 Maintenance Changing System Software 4 6 3 Replacing the internal battery 1 Disassemble the monitor to expose the battery see Internal Assemblies on page 25 Battery Battery bracket 2 Slide the battery bracket out from the bottom cover assembly The calibrator connector cable may be secured to the bracket with tie downs be sure not to stress or damage the cable 3 Disconnect J302 from the power supply board Remove the old battery and replace with the new one Remove the wire harness from the old battery and install on the new one red is po
11. all controlled by IC28 when selected by the OPORT line IC21E pin 10 The OPORT line will go high when the LATCHI and WR line both go low at IC23D pins 13 and 12 this will send output pin IC23D pin 11 low which drives inverter IC21E pin 10 high enabling IC28 ADC CS Analog to Digital Converter chip select ZPRESS Zero barometric pressure line HEATER Heater enable disable HYP Hyperbaric mode line INTACK Interrupt acknowledge line FLWREN Flash write enable line SCK Serial clock line for the A D converter DIN Data in line for the A D converter A 3 to 8 decoder is used to control the DACCS RTC DISPCS AUD KEYS LATCHI LATCH2 2KEYS lines When the IOE line goes low and the LIR line goes high being inverted by IC21A pin 2 and presented to IC22 pin 5 as a low enable line IC22 is enabled YO Y7 will be driven low depending upon the A4 A5 and A6 lines on pins 1 2 3 respectively on IC22 See page 2 on schematic With the LPORT line high IC13 is enabled this latches the data on lines DO D7 on its output pins Q0 Q7 the outputs correspond to the following eight lines CALLOW selects the low calibration gas on the Model 868 Calibrator TML Two Minute LED drives the Y LED on the front display AOL Audio Out LED drives the LED on the front panel ARL Alert LED drives J LED on the front panel KJL drives Q17 when high which in turn drives the Alert Bar LEDs via J105 BTL Battery Low LED on the front panel DSPBR controls the
12. be 14 Model 860 Service Manual Rev 00 2534 Front End Board Theory of Operation 3 3 3 3 3 4 Rev 00 positive This positive voltage will override the voltage controlled oscillator consisting of IC15B and and cause IC15 pin 7 to switch to the negative rail and shut off Q4 The V5 at the gate of Q2 turns on the FET and allows heater current to flow providing the Software Heater Control FET Q3 is also on and the electrode starts to heat As the Actual temperature rises to the point where it equals the set temperature the summing junction of 5 pin 13 goes to Ov and IC15 pin 14 switches to Ov When this occurs the oscillator circuit takes over and pulses Q4 on and off to keep the temperature constant The frequency at this point can vary from OHz cold or extremely hot sensor to 3KHz If the set temperature is lowered below the actual temperature the summing junction of IC15 pin 13 will be negative IC15 pin 7 switches positive Q4 turns on and Q2 turns off until the electrode cools to the new temperature The capacitors C52 and C53 slow the temperature control process just enough so that variables like ESU noise do not cause electrode temperature variations Protection circuitry has been installed which monitors the raw voltage across T1 coming back from the sensor Op amp IC17C operates as a comparator with one input at a reference of 1 89 volts The other input is connected to Thermistor 1 before it
13. defaults 4 Check for 5 00V at FB1 adjust VR1 if necessary Rev 00 Model 860 Service Manual 37 Z Electronic Tests 2534 01 Front End Board Tests 5 O Qo o N Q Verify the following voltages Voltage Location Tolerance VA D4 Anode 13 00 to 17 00 Vdc V5 J108 16 on 2534 FE bd 4 80 to 5 20 V5 J108 10 on 2534 FE bd 4 80 to 5 20 Vdc VA J108 12 on 2534 FE bd 13 00 to 17 00 Vdc Vback D18 Cathode 4 50 to 4 80 Vdc Measure for 2 048 Vdc 1 mV Use TP5 for ground reference Adjust VR6 if necessary Measure TP4 for 2 048 Vdc 1 mV Use TP5 for ground reference Adjust VR7 if necessary Enter the Engineering Screen by simultaneously pressing and holding the MENU and keys Read and record the current Barometric Pressure from the Calibrated Barometer Check that the BAR value in the Engineering Screen matches the Barometric Pressure from setp 9 Adjust VR2 if necessary 7 3 2534 01 Front End Board Tests 7 3 1 7 3 2 The front end board tests use the TB201 Test box that is included as part of the TCO2M Transcutaneous Monitor Model 860 Service Test Kit Catalog No 6914 00 Contact NOV A TECHnical Support 1 800 243 3444 for more information Equipment Required Transcutaneous Monitor Model 860 Service Test Kit Catalog No 6914 00 D Test Jack TB201 Test Box 4478 01 cable e TF0012 test jack DVM calibrated Tes
14. is amplified by IC8 If the voltage at ever goes above 1 89 volts then IC17C will go low This turns Q5 on which biases Q3 off preventing heater current from flowing Software Heater Shutdown Control The FET Q3 is normally on It provides a software based heater shut off It acts as a backup safety circuit to the hardware heater control circuits The HEATER line is normally high This turns off Q5 and allows Q3 to turn on This lets heater current flow provided Q2 the hardware heater control is also on If the software senses a temperature fault HEATER goes low Q5 turns on Q3 turns off and the heater current is interrupted so that the electrode cools The only way to reset the software heater control bit is to turn the monitor off and back on again and providing that the fault has been corrected This was done to increase patient safety There are two ways in which the software can sense a temperature fault The first which has the slower reaction time 10 seconds is via the HARDERR line When the hardware detects a temperature fault this line is brought high and read by the processor the processor reacts by setting the HEATER line low turning the heater off The second which reacts in less than 5 seconds if the HARDERR fails to function properly operates by monitoring both T1 TP5 and T2 TP4 If the software detects a temperature fault the HEATER line is brought low turning the heater off Sensor Temperature Fault Monitori
15. page 3 on schematic The TCO M controls the calibrator through opto isolators IC34 IC36 When the calibrator is connected to the monitor pin 4 of J103 is brought to ground potential and current flow through R58 and the LED portion of opto isolator IC34 This brings the CALEN line low indicating that the calibrator is connected The CALHIGH and CALLOW lines control opto isolators IC36 and IC35 respectively These lines control the switching of the high gas and low gas during a sensor calibration When the CALHIGH line is brought high the LED portion of IC36 biases the transistor portion on this in turn turns Q3 on and activates a solenoid valve in the calibrator that allows high calibration gas to flow The CALLOW line operates in a similar manner with IC35 and Q2 Barometric Pressure See page 4 on schematic The barometric pressure is measured by IC38 Amplifier IC37D is configured as a constant current source for the bridge circuit in IC38 Variations in the bridge circuit correspond to barometric pressure changes and are amplified by IC37A and IC37B Amplifier IC37C serves as a buffer before the signal is brought to the Front End board multiplexor The ZPRESS line is used for circuit offset compensation When ZPRESS is high Q14 turns on this biases Q15 on which effectively shorts IC38 pins 1 amp 3 With IC38 effectively out of the circuit only the circuit s offset voltages will be present on the VBARRO line The analog to digital converter ca
16. text 7 1 2 Tests 1 Disassemble the TCO M to expose the power supply rear panel assembly see Assembly Exchanges on page 25 2 Remove the connector from J302 on the power supply board Carefully remove the power supply rear panel assembly from the unit 3 Connect the line cord to the power entry module power supply rear panel assembly Be careful line voltage is now present on the power supply rear panel assembly Set the power switch to measure the voltage at J302 verify 13 2 VDC use the negative terminal of C1 as ground reference for all measurements 4 Measure the voltage across the positive terminal of C1 VIN verify approximately 25 2VDC 5 Measure the voltage on pin 3 of E302 LINEST with the DVM verify 5 0 2 VDC 6 Monitor the voltage at F302 VBATT with the DVM attach the 100 Q resistor across the terminals of J302 Verify the voltage is 14 1 0 4 VDC Disconnect the resistor Rev 00 Model 860 Service Manual 35 Z Electronic Tests 2533 01 CPU Interface Board Tests 7 Connect the anode of the diode to pin one of J302 then the 10 O resistor between the cathode and pin 2 of J302 see below Verify that the voltage oscillates this checks the current limit circuitry 1N5820 10 Q 10W 1 I J302 2 O 8 Disconnect the diode resistor from J302 9 Set the power switch off O remove the line cord from the power entry module Re install the power s
17. the gain of IC4B will be reduced to compensate for the higher measurements expected in hyperbaric operation Sensor Carbon Dioxide Value Measurement The CO sensor outputs a voltage inversely proportional to the amount of CO present at the sensor membrane patient interface The CO signal is input to the unity gain buffer IC5 to provide a low impedance signal The output from 5 is tied to a guard ring and to the junction of C12 and C14 This puts both sides of C12 at the same potential to avoid leakage problems and to give filtering without overloading the very high impedance PtcCO input signal The second stage provides gain and offset The output at IC4 pin 6 TP6 has a range of 2 048v to 2 048v where 2 048v represents a CO input voltage of 27mv nominal and 2 048v corresponds to an input voltage of 310mv nominal The output of this stage is input to the MUX chip IC6 where it can be read by the processor Multiplexor The various analog signals from the sensor and other lines that the processor must monitor are converted to digital values by an analog to digital converter on the CPU Interface board This device looks at one analog signal at a time converts the signal to a digital value then transmits the value to the processor on command Since there are several signals to be converted and the converter can monitor only one signal at a time a multiplexor is used to switch the desired signal for conversion as required
18. types Sensor P N Description Resistor TP9 Volts 6752 00 2 19 1 KW 1 344 6754 00 O2 53 6 KW 1 726 4474 00 O2 CO2 none 2 048 4474 39 O2 CO2 6 81 KW 0 830 16 Model 860 Service Manual Rev 00 2534 Front End Board Theory of Operation 3 9 7 3 3 8 3 3 9 Rev 00 The detected sensor ID is utilized by the TCO gt M in a variety of ways The first is to see if a valid sensor has been connected If the measured voltage is not within 3 of the value listed an ID error message is displayed on the 860 message center Secondly if the sensor attached is a 6752 00 or 6754 00 the measured parameter is displayed and the other is blanked The last function is to vary the gain of the O gt circuitry Sensor Oxygen Value Measurement The sensor outputs a current proportional to the amount of oxygen present at the sensor membrane patient interface The sensor is biased at 700mv nominal via E4 The wiper of VR3 is at this potential this forces the IC7 inputs to this potential also The input network is biased such that an open input no sensor connected will yield 0 0v at IC7 pin 6 VR3 O Zero is adjusted for this voltage The output range is 0 0v to 3 0v with a scale factor of 50uv pa micro volts per pico ampere input current When the monitor is set for hyperbaric operation the processor will set the HYP line high This will bias Q7 off which in turn biases Q1 off When Q1 is off then R5 is out of the circuit and
19. ve 9 Precision Reference Supplies eese menn 9 Low Battery Voltage Shutdown sese 9 c i tante ite ec eoe e od kd m een d 10 Memory 10 Real Time Glock et eb ad huasita yo 10 Sound gerierator cie eed perte e cd deba 11 KeypanelIriterfaCe uu ete reb ire eed ee tire iie cr up cia 11 Display Interface cerei ete tre HE Een ERR ERES ERROR REOR 11 Device Controller Hr REPRE PRATER EE NERA 12 Watchdog Tier tei Rie ui bd edet eee end 12 RS232 Serial Communication eene 12 Calibrator COntFOl kana eir hts 13 Barometric Pressute 2 o ed dee eret rad ieu es 13 Analog to Digital Conversion i pecie neo eter eet edens 13 Temperature Control YU eme PIE Rage Yin ve vie 14 Battery Voltage Monitoring nnne nnne 14 2534 Front End Board 2e Here tette deret bit Mee heec ie tette uod 14 Sensor Temperature eene mene 14 Sensor Heater Control us bh tete Hee 14 Software Heater Shutdown Control sese 15 Sensor Temperature Fault eme 15 Sensor Heater Power Local
20. 1 IC 1220A 015A 3N PRESSURE SENSOR 8 PIN 487119 1 IC LTC699CN8 UPROCESSOR SUPV 8 PIN 515072 1 FUSE 1A 125V VERY FAST ACTING PLUG IN 515511 1 FUSEHOLDER VERT 5A 125V PC MOUNT 5712 10 01 1 TRANSFORMER MAIN BD 5833 01 01 1 GROUND WIRE ASSY MAIN BOARD 6618 07 13 1 PROGRAM EPROM ASSY SYSTEM ASSY 2534 01 02 FRONT END BOARD ASSY LINE PART NO REV QPA DESCRIPTION 151001 1 CAPACITOR 001UF 20 100V MYLAR 151002 3 CAPACITOR 01UF 20 200V MYLAR 151005 2 CAPACITOR 1UF 20 100V MYLAR 151006 1 CAP 1UF 20 50V METIPOLY METALIZED POLYCARB 152042 1 CAPACITOR 1UF 35V RADIAL 152048 3 CAP 4 7UF 16V 10 ELECTROLYTIC TANT 154016 28 CAPACITOR 1UF 50V 10 1 SP X7R DIPPED 180004 CHOKE 100UH 10 SHIELDED 180007 3 INDUCTOR 1UH AXIAL LEADED 212537 1 CONNECTOR 20 PIN HEADER DIL STR 1 SP 216029 0 TEST POINT SPRING LOADED 475 DEG C MAXIMUM 216071 0 TERMINAL TEFLON INSULATED PRESS IN PLACE 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 284200 0 4 40 X 1 4 SLOTTED BINDING HEAD STEEL CAD 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 310006 1 INSULATING WASHER 472021 3 RESISTOR 4 75K OHM 1 4W 1 CARBON 472022 2 RESISTOR 4 99K OHM 1 4W 1 CARBON 472023 1 RESISTOR 5 11K OHM 1 4W 1 CARBON 472030 5 RESISTOR 10K OHM 1 4W 1 CARBON 472036 1 RESISTOR 13 3K OHM 1 4W 1 CARBON 52 Model 860 Service Manual
21. 20 200 240 V AC 50 60 Hz 40 VA Battery Greater than 3 hour operation 12 hour maximum recharge lead acid gel cell Display Type Cold Cathode Display CCD 5 x 1 5 inches W x H 12 7 x 3 8 cm User adjustable contrast Monitor Size 3 3 x 9 0 x 8 0 inches H x W x D 8 4 x 22 8 x 20 cm Weight 8 pounds 3 6 kg Temperature Operating 10 40 C 50 104 F Storage 10 55 C 14 131 F Relative humidity 0 90 non condensing Altitude Pressure Automatic barometric pressure compensation Range 560 800 mmHg 71 9 106 6 kPa Safety Regulatory Designed to comply with EC and TUV IEC 601 1 UL 2601 and CSA 601 1 M90 standards EN55011 1991 Class A Classification for Radiated and Conducted Emissions EN60601 1 2 1993 Collateral standard Electromagnetic compatibility requirements and test Includes IEC801 2 Electrostatic Discharge Requirements IC801 3 Radiated Electromagnetic Fields IEC801 4 Electri cal Fast Transient Burst IEC801 5 Surge Transients Electromagnetic fields up to 3 V m will not adversely affect system performance Model 860 Service Manual 43 8 Specifications 8 2 Sensors Parameter Principle of Operation Response Time tog Stability Diameter Height Combination only or only Stow Severinghaus pH Clark type polarographic CO 45 sec O gt 12 sec Better than 2 mmHg hr 19 11 mm 0 75 0 41 in 8 3 Gas Calibrator Model 868 Calibration System Gas Cylinders Physic
22. 5827 32 03 1 WARNING LABEL EXPLOSION HAZARD 0004 6617 32 00 1 INSTRUCTIONS LABEL TOP COVER 0005 6873 01 01 1 MAIN ASSY 0007 6633 06 00 0 ACCESSORIES LIST 0009 6633 40 00 0 DESIGN DOCUMENTATION 0011 6633 75 01 0 DEVICE MASTER RECORD 0012 6705 13 01 1 TOP COVER PAINTING 0015 286205 0 6 32 X 3 4 S B H CAD PLATED ASSY 6873 01 01 MAIN ASSY MODEL 868 TC CALIBRATOR LINE PART NO REV QPA DESCRIPTION 0001 6633 43 00 0 DATA SHEET 0002 6662 17 00 1 REAR PANEL SUBASSY 0003 6704 13 01 1 BOTTOM COVER PAINTING 0004 6761 16 00 1 ALERT LENS WHITE 0005 6779 10 00 2 REGULATOR SINGLE STAGE 0006 6865 01 01 1 FRONT PANEL ASSY 0007 6866 10 00 1 REGULATOR PANEL 0008 6869 10 00 1 TANK SUPPORT LONG 0009 6873 04 00 0 TEST PROCEDURE REGULATOR MAIN ASSY 0015 161000 0 TEFON TAPE 1 4 IN WIDE WHITE 0016 240056 4 FOOT RUBBER 81 SQ X 3 HI W TAPER WHITE 0017 250043 2 PRECISION FLOW RESTRICTOR TYPE L BRASS BARB 0018 250158 2 FITTING CONNECTOR 1 8 NPT MALE TO 1 8 OD TU 0019 280111 2 GASKET 1 8 I D X 19 64 O D X 020 THK BUN 0020 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 0021 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 0022 288216 0 SCREW 8 32 X 1 4 L BUTTON HEAD HEX SOCKET 0023 161008 0 ADHESIVE 242 THREADLOCKER MED STR BLUE 54 Model 860 Service Manual Rev 00 Model 868 Calibrator Parts 10 ASSY 6865 01 01 FRONT PANEL ASS
23. ATTERY HARNESS ASSY 0007 6612 01 02 1 REAR PANEL ASSY 0008 6614 01 01 1 INTERFACE CABLE ASSY GAS CALIBRATOR 0009 6615 01 03 1 BOTTOM COVER ASSY 0010 6616 01 01 1 TOP COVER ASSY 0011 6619 01 00 1 FRONT PANEL ASSY 0012 6644 10 00 1 SHIELD ANALOG FRONT END BOARD 0013 9621 16 02 1 LENS ALERT 0014 6791 10 00 1 INSULATING SHIELD FRONT END BOARD 0017 140002 2 CARD GUIDE 2 5 L SNAP IN NYLON WHITE 0018 161067 TAPE CL CELL POLYCHLOROPRENE Model 860 Service Manual 47 10 Parts Model 860 LINE PART NO REV QPA DESCRIPTION 0020 280023 0 SPACER HEX 4 40 X 3 8 LG TAP THRU 0021 284200 0 4 40 X 1 4 SLOTTED BINDING HEAD STEEL 0022 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 0023 286205 0 6 32 X 3 4 S B H CAD PLATED 0025 400024 1 BATTERY 12V DC 2 3 AMP HOUR LEAD ACID 0027 608124 0 CABLE CLIP SIDE OPEN 160 DIA CABLE 0030 6815 10 00 1 INSULATING SHIELD POWER SUPPLY ASSY 6612 01 02 REAR PANEL ASSY LINE PART NO REV QPA DESCRIPTION 0001 2726 01 02 1 POWER SUPPLY BD ASSY 0002 4109 10 00 1 P C SUPPORT BKT 0003 5812 10 01 2 SPACER SUPPORT 0005 6497 01 01 1 GROUND WIRE ASSY POWER ENTRY MODULE 0006 6498 01 01 1 POWER CABLE ASSY REAR PANEL 0007 6612 17 01 1 REAR PANEL SUBASSY 0008 6549 01 01 1 GROUND WIRE ASSY 5 1 2 IN L REAR PANEL ASSY 0011 161008 0 ADHESIVE 242 THREA
24. DLOCKER MED STR BLUE 0012 210149 1 POWER ENTRY MODULE SEL FUSE ON OFF SW 0013 216059 1 CONNECTOR PLUG POTENTIAL COMPENSATION 0014 280188 0 STANDOFF 3 8 DIA X 3 8 L 6 32 THD THRU 0015 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 0016 281501 0 NUT HEX NO 6 32 STEEL CADMIUM PLATE 0017 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 0018 285001 0 LOCK WASHER NO 6 INTERNAL TOOTH STEEL 0019 285005 0 FLAT WASHER NO 8 STEEL CAD PL 0020 286219 0 SCREW 6 32 X 1 1 4 31 8 L PAN HD PHILLIP 0021 515023 2 FUSE 1 2A 250V SLO BLO 5 X 20MM 0022 608033 1 WIRE CLIP amp BUSHING SET LINECORD RETAINER 0023 285013 0 NYL WASH 4 NATURAL COLOR 115 ID 281 OD 0024 180036 1 FERRITE SPLIT 181 OHMS 100MHZ RND CABLE 0025 315026 1 LABEL EARTH SYMBOL ASSY 6615 01 03 BOTTOM COVER ASSY LINE PART NO REV QPA DESCRIPTION 0001 4727 10 04 1 KICKSTAND BEDRAIL 0002 5405 10 00 1 SHIELD BATTERY 0003 5409 32 00 1 LABEL WARNING POLE MOUNT 0004 5760 16 00 2 LEFT FOOT WHITE KICKSTAND 0005 5761 16 00 2 RIGHT FOOT WHITE KICKSTAND 0006 5826 10 01 4 FOOT PAD BOTTOM COVER 0007 5849 10 00 1 BRACKET SUPPORT 48 Model 860 Service Manual Rev 00 Model 860 Rev 00 Parts 1 0 LINE PART NO REV QPA DESCRIPTION 0008 6615 13 01 1 BOTTOM COVER PAINTING 0015 161007 0 ADHESIVE 414 HIGH STRENGTH COLOR CLEAR 0016 161064 0 TAPE 3 4 X 60
25. ETAL CERAMIC 153013 1 CAPACITOR 33PF 100V 2 1 SP METAL CERAMIC 153021 1 CAPACITOR 47UF MULTILAYER CERAMIC 153051 1 CAPACITOR 22UF 50V 20 1 2 54 SP MLTLY 153052 1 CAPACITOR 022UF 50V X7R 100 SPACING 154016 39 CAPACITOR 1UF 50V 10 1 SP X7R DIPPED 154046 1 CAPACITOR 3900PF 33V 2 POLYPROPELENE 154057 1 CAPACITOR 470PF 100V 10 2 5 SP 154058 1 CAPACITOR 022UF 100V 10 2 SP MET POLY 154060 1 CAPACITOR 22UF 63V 10 2 5 SP MET POLY Model 860 Service Manual 49 10 Parts Model 860 LINE PART NO REV QPA DESCRIPTION 154076 2 CAPACITOR 01UF 63V 1 POLYPROPYLENE 154088 1 CAPACITOR 1UF 50VDC METALZD POLYCARBONATE 161039 0 FOAM TAPE 1 32THK X 2 1 2WIDE X 216FT DBL SD 180010 1 INDUCTOR 18UH 10 200 SPACING PC MOUNT 180011 5 FERRITE BEAD 22 AWG TCW WIRE THRU CORE 180012 1 FERRITE BEAD 138 3 5 OD 031 8 ID 180033 2 EMI FILTER 22PF 20 100V INT FER 3 LEAD 210051 1 CONNECTOR 25 PIN RECEPTACLE R ANGLE 211213 2 CONNECTOR 2 PIN POST HEADER 211412 1 CONNECTOR 4 PIN HEADER R ANGLE PC MNT 211414 1 CONNECTOR 4 PIN PLUG FRICTION LOCK 211421 1 CONNECTOR 4 PIN HEADER STR 079 SP 212501 1 CONNECTOR 20 PIN HEADER DUAL ROW STR 212529 1 CONNECTOR 20 PIN HEADER STRAIGHT 212538 1 CONNECTOR 20 PIN RECPT DIL STR
26. IC16B indicates a Hardware Fault to the CPU low at HARDERR Secondly Q4 turns on regardless of the state of the heater control which shuts off Q2 shutting down the heater circuit A Hardware Fault and shutdown of the heater circuit via Q4 and Q2 will also occur if the voltage measured by thermistor 2 TP4 rises above 45 5 C Comparator IC16D pin 9 is biased at 1 12v by resistors R77 and RP2 pins 6 amp 5 When T2 TP4 exceeds 1 12v 45 5 C pin 8 will go high causing IC16B to latch setting the HARDERR line The circuit consisting of IC17D and Q6 insures reliable monitor operation at ambient temperatures less than 10 C 50 F Cold temperatures may cause the thermistor values to be nonlinear For this reason if thermistor 1 is greater than 2 048v or 30 C pin 14 will switch positive and turn on Q6 This disables the window comparator at IC16A and IC16C so that IC16B will not go positive and latch out the heater circuit Once the electrode heats up to 30 C the thermistors will be in their linear region and IC17 pin 14 returns negative This shuts Q6 off and re enables the window comparator 3 3 5 Sensor Heater Power Local Power The amplifier IC17b monitors heater power by integrating the pulse width modulated heater current as measured through the resistors R34 and R35 to get an average DC value The circuit consisting of R61 R62 and C44 filter out any voltage difference across the two grounds analog and digital use
27. LM79L05ACZ NEGATIVE 100M 484531 2 VOLTAGE REGULATOR LM341T5 0 5V SOOMA 484533 1 VOLTAGE RGLTR MIC2950 05BZ ADJUSTABLE 485510 1 VN10LM VMOS F E T 485520 1 TRANSISTOR BS250 P CHANNEL MOSFET 485527 1 MOSFET IRF9523 8 OHMS 60V P CHANNEL 485528 1 MOSFET IRF540 085 OHMS 100V N CHANNEL 485529 3 TRANSISTOR VN0610L N CHANNEL ENHANCEMENT 486048 1 IC HM628128LP 12 128K X 8 BITS RAM DIP 486255 1 IC SN76496AN PROGRAMMABLE TONE GENERATOR 486276 1 IC LT1081CN DUAL RS232C DRIVER RCVR 5V 486285 1 IC HD64180R1P6 HIGH INTEGRATION CMOS 8 BIT 486298 1 IC MM74HC4020N 14 STAGE BINARY CNTR 486305 1 IC MSM6242BRS CMOS REAL TIME CLOCK CALENDAR 486344 1 IC MAX132CNG 18 BIT A TO D SERIAL OUT 486600 1 IC CD4013B DUAL D TYPE FLIP FLOP Model 860 Service Manual 51 10 Parts Model 860 LINE PART NO REV QPA DESCRIPTION 486606 1 CD4093BE QUAD 2 INPUT NAND GATE 486625 2 MC74HC32N I C QUAD 2 INPUT OR GATE 486651 1 MM74HC138 I C 3 TO 8 LINE DECODER 486675 1 MM74HC14N IC CMOS 486676 1 MM74HC74N IC CMOS 486680 4 IC MM74HC573AN OCTAL D TYPE LATCH 3 STATE 486685 1 AD7528JN IC CMOS INTERFACE 486743 3 IC TLO64BCN AMP LOW OFFSET 487009 3 IC 4N32 OPTOISOL IR EMITTER TO PDARLINGTON 487061 1 IC TBA820M MONOLITHIC INTEGRATED AUDIO AMP 487064 4 IC 17 PHOTON COUPLED ISOLATOR 487065 1 IC UC3843N CURRENT MODE PWM CONTROLLER 487102
28. ON HIGH SPEED 483002 2 2N3906 PNP SILICON SWITCHING amp AMPLIFIER TRA 484010 1 NPN TRANSISTOR 2N3904 485510 2 VN10LM VMOS F E T 485515 1 TRANSISTOR BUZ71A F E T N CHANNEL POWER 485516 1 TRANSISTOR IRFD 9120 9 CHAN ENHANCEMENT 486673 1 CD4051B CMOS ANALOG MUX DMUX 486704 2 OPO7CN8 AMP ULTRA L VOLT OFFSET 486737 2 LOW INPUT CURRENT OP AMP CA3420E 486743 3 IC TLO64BCN OP AMP LOW OFFSET 486816 1 IC LT1013CN8 DUAL PRECISION 8 PIN 608001 0 CABLE TIE 094 X 3 62L SELF LKG 6609 01 00 1 INPUT CABLE ASSY O2 amp CO2 0001 2534 02 02 1 FAB FRONT END BOARD 0002 2534 03 02 SCHEMATIC FRONT END BOARD 0003 2534 04 01 TEST PROCEDURE FRONT END BD ASSY Model 860 Service Manual 53 10 Parts 10 2 Model 868 Calibrator Model 868 Calibrator There are two versions of the Transcutaneous Calibrator The current version is listed first under Newer Calibrator and the different assemblies of the older version are listed under Older Calibrator The older version can be identified by the two gas guages that are located to the left of the front panel the HIGH gas guage is above the LOW gas guage The newer version has the guages located to either side of the SENSOR port 10 2 1 Newer Calibrator ASSY 6633 00 01 TRANSCUTANEOUS CALIBRATOR MODEL 868 LINE PART NO REV QPA DESCRIPTION 0001 1217 32 03 1 REPAIR LABEL 0002 6070 32 01 1 LABEL SERIAL NUMBER 0003
29. Printer 120 vac interface cable included 5703 00 Seiko DPU 411 Thermal Printer 220 vac interface cable included 300017 Seiko DPU 411 Thermal Printer Paper 5 rolls per box 5694 00 Cable to Seiko DPU 411 Printer 5861 00 Cable Seiko DPU 411 Printer powers printer from TCO M 5334 00 Cable Serial Output to Personal Computer 25 pin connector 5335 00 Cable Serial Output to Personal Computer 9 pin connector 9622 01 Analog Module for TCO M includes RS232 pass thru 5333 00 Cable Analog Output Module open ended 6 ft Model 860 Service Manual 45 9 Accessories 7106 10 7105 10 7104 10 600026 Transport Pouch for monitor Monitor Accessory Pouch with Printer Support Side Accessory Pouch included with monitor Power Cord included with monitor Mounting Systems 140030 140031 140032 140033 140034 140035 140036 140037 Wall Mount Wall Mount less Wall Channel Pivot Block Mount Transport Mount without swivel head Transport Mount with swivel head Countertop Mount 11 inch Base Countertop Mount 5 inch Base Portable Instrument Housing Extended Warranty 6590 81 6633 81 6590 82 6590 83 6590 84 6590 85 Warranty Extension an additional 1 year s at time of purchase Normal Warranty Monitor 1 year Sensor 1 year Calibrator 1 year Monitor Model 860 Model 868 Gas Calibrator TCO5M Monitor amp Gas Calibrator amp Combination Sensor TCO M Monitor amp Gas Calibrator amp S
30. Select lines Data bits DO D7 are used as input output lines and 0 is used in conjunction with the RD and WR lines to distinguish between read and write operations as listed below AO RD Low WR Low Command Write Low Data Read Data Write High Status Read See page 2 on schematic The CNTRST Contrast line is controlled by pressing the front panel key When depressed and held the processor controls the digital to analog converter IC29 line AO is brought low along with WR DACCS the data on DO D7 controls the voltage at IC30 pin 7 The output of IC30 pin 7 along with V5 feeds a summing amplifier IC30 pins 1 2 3 The output of the summing amplifier IC30 pin 1 controls the base of Q10 which in turn controls the contrast of the display through a variable negative voltage The backlight for the display is controlled by the DISPBR Display Bright line see page 2 on schematic When DSPBR is high the gate of Q16 is biased off current flows from Vcc through R51 to 45 This sets the backlight for low illumination The illumination of the backlight is made greater when Model 860 Service Manual 11 3 Theory of Operation 2533 CPU Interface Board DSPBR is made low this biases Q16 on which essentially shorts out R51 allowing more current to flow into IC45 creating a full backlight 3 2 11 WO Device Controller See page on schematic The ADC CS ZPRESS HEATER HYP INTACK FLWREN SCK and DIN lines are
31. Service Manual Service Policy Novametrix Medical Systems Inc will provide Warranty Service Support to its customers within 48 hours of receiving a telephone request for technical support This 48 hour period begins once a service request is placed through the Factory Technical Support Department in Wallingford Connecticut Novametrix provides factory direct technical support to its customers through a technical support group located in Wallingford Connecticut and company service representatives located throughout the United States All Technical Support for Novametrix products is provided Factory Direct Novametrix provides 24 hour a day technical support accessibility via telephone numbers 800 243 3444 or 203 265 7701 After hours technical support requests before 8 00 AM and after 5 00 PM Eastern Time will be responded to promptly by the Technical Support On Call staff It is suggested that any person calling in for technical support have the inoperative equipment available for preliminary troubleshooting as well as product identification Novametrix reserves the right to repair or replace any product found to be defective during the warranty period Repair may be provided in the form of replacement exchange parts or accessories on site technical repair assistance or complete system exchanges Repairs provided due to product abuse or misuse will be considered non warranty and invoiced at the prevailing service rate Any replaced def
32. TCO M Transcutaneous 2 Monitor Service Manual Model 860 May 16 1997 Catalog No 6590 90 00 Novametrix Medical Systems Inc 5 Technology Drive Wallingford Connecticut U S A 06492 Copyright 1997 All rights reserved No part of this manual may be reproduced without the written permission of Novametrix Medical Systems Inc Printed in U S A H Revision History 16 May 97 Release at revision 00 This document contains information which is proprietary of Novametrix Medical Systems Inc and may not be reproduced stored in a retrieval system translated transcribed or transmitted in any form or by any means without the prior explicit written permission of Novametrix Medical Systems Inc Novametrix reserves the right to change specifications without notice and NOVADISK are registered trademarks and NovaCARD and NovaCOM are trademarks of Novametrix Medical Systems Inc Hev 00 Model 860 Service Manual ili This page intentionally blank iV Model 860 Service Manual Rev 00 Rev 00 G Guarantee Equipment manufactured or distributed by Novametrix Medical Systems Inc is fully guaranteed covering materials and workmanship for a period of one year from the date of shipment except for certain disposable products and products with stated guarantees other than one year Novametrix reserves the right to perform guarantee service s at its factory at an authorized repair station or at the customer s ins
33. TS ILLEGAL TASK MONITOR ERROR DISP BUFFER OVERFLOW 32 Model 860 Service Manual Rev 00 6 Functional Tests The functional tests verify the overall functional integrity of the monitor and sensor If the monitor and sensor do not pass these tests remove from use and contact the Novametrix Service Department for repair replacement assistance 6 1 Equipment Required Line cord supplied with unit PN 600026 4474 00 Probe TCO M Calibrator Model 868 High point calibration gas PN 8965 Low point calibration gas PN 8964 6 2 System Tests 1 Press the lt key to turn the monitor on Install a 4474 00 electrode Verify the electrode heats to 44 0 C 0 1 C or the temperature that is currently selected Connect the TCO M Calibrator Model 868 to the TCO M Monitor Enter the engineering screen by simultaneously pressing and holding the MENU and keys Press the LOW key and verify the calibrator s low LED is on Verify the high LED is off Press the HIGH key and verify the calibrator s high LED is on Verify the low LED is off Press the OFF key and verify both LEDs are off Install the 4474 00 electrode in the gt Calibrator Model 868 probe nest Press the RUN Softkey to return to the main menu Calibrate the 4474 00 electrode Press the CAL key followed by the START key When the calibration is done remove the electrode from the calibrator s probe nest and allow to stabilize in room a
34. Y MODEL 868 TC CALIBRATOR LINE PART NO REV QPA DESCRIPTION 0001 2541 01 01 1 CALIBRATOR BOARD ASSY 0002 6695 10 01 1 PROBE NEST 0003 6696 10 00 1 KNOB PROBE NEST 0004 6697 10 01 1 SHAFT PROBE NEST 0005 6861 16 00 2 GAGE PANEL MOUNT 0006 6865 17 01 1 FRONT PANEL SUBASSY 0011 160036 0 SOLVENT METHYLENE CHLORIDE DICHLOROMETHANE 0012 161000 0 TEFON TAPE 1 4 IN WIDE WHITE 0013 161075 0 ADHESIVE 430 FAST SETTING GENERAL PURPOSE 0014 161091 0 ADHESIVE 425 FAST SETTING THREADLOCKER 0015 250027 0 URETHANE HOSE BLUE 1 16 I D X 1 8 O D 0016 250152 2 GAUGE 0 300 PSI ROUND PANEL MOUNT 0017 250156 1 FITTING TEE FOR 1 16 ID TUBING W 10 32 THD 0018 250157 2 FITTING CONNECTOR 1 8 NPT FEMALE TO 1 8 OD 0019 280081 1 O RING 551 ID X 070 BEAD SILICONE 0020 280229 1 SPRING COMPRESSION 18 OD X 5 L 02 DIA 0021 280230 1 RETAINING RING FOR 1 8 DIA SHAFT 0022 281500 0 NUT HEX NO 4 40 STEEL CADMIUM PLATE 0023 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL 0024 250160 2 TUBING PFA 1 8 IN OD WITH 1 32 IN THK WAL ASSY 6662 17 00 REAR PANEL SUBASSY MODEL 868 TC CALIBRATOR LINE PART NO REV QPA DESCRIPTION 0001 6662 10 00 1 PANEL REAR 0002 6662 32 01 1 FACEPLATE REAR PANEL 10 2 2 Older Calibrator ASSY 6633 01 01 MAIN ASSY MODEL 868 TC CALIBRATOR
35. YDS CLEAR DOUBLE SIDED ADHESIVE 0017 284261 0 SCREW 4 40 X 5 8 L PHILLIPS 82 DEG FLT HD 0018 284264 0 SCREW 4 40 X 1 4 L SLOTTED 82 DEG FLT HD ASSY 6619 01 00 FRONT PANEL ASSY LINE PART NO REV QPA DESCRIPTION 0001 2473 01 01 1 ALERT BOARD ASSY 0002 6547 27 00 1 MEMBRANE KEYPANEL 0003 5720 01 00 1 DISPLAY ASSY 0004 6278 10 00 1 SHIELD VFD 0006 280033 0 SPACER 4 X 1 8 CLEARANCE 0007 280187 0 STANDOFF 187 DIA X 5 8 L 4 40 F F THD 0008 284200 0 3144 40 X 1 4 SLOTTED BINDING HEAD STEEL CAD 0009 284204 0 3144 40 X 1 2 SLOTTED BINDING HEAD STEEL CAD 0010 285000 0 LOCK WASHER NO 4 INTERNAL TOOTH STEEL ASSY 2533 01 03 CPU INTERFACE BOARD ASSY LINE PART NO REV QPA DESCRIPTION 151001 1 CAPACITOR 001UF 20 100V MYLAR 152001 2 CAPACITOR 6 8UF 25V 10 TANTALYTIC RAD LEADS 152040 3 CAPACITOR 2 2UF 35V TANTALUM 152045 7 CAPACITOR 10UF 16V 0 2 PITCH 152048 2 CAP 4 7UF 16V 10 ELECTROLYTIC TANT 152066 1 CAPACITOR 220UF 63V RADIAL ELECTROLYTIC 152073 2 CAPACITOR 100UF 16V 20 ALUM ELCTLT 152075 2 CAPACITOR 47UF 25V 20 AL ELCTLT RADIAL 152084 2 CAPACITOR 470UF 25V 20 AL ELCTLYTC 152085 2 CAPACITOR 1500UF 16V AL ELCTLT RADIAL 152086 2 CAPACITOR 1000UF 16V 20 AL ELCTLYTC 153003 1 CAPACITOR 01UF 50V O 1 PITCH X7R 153012 6 CAPACITOR 22PF 100V 2 1 SP M
36. al Power Fully automatic using a true two point sensor calibration against known gases Type PD Contents 16 liters at 16 5 bar 21 C 0 6 cu ft at 240 psig 70 F Size 3 3 x 9 0 x 16 5 in H x W xD 8 4 x 22 8 x 41 9 cm includes cylinders Weight 3 lbs 1 4 kg All calibrator power provided by monitor 44 Model 860 Service Manual Sensors Rev 00 Rev 00 Accessories Transcutaneous Monitor 6590 00 TCO M Transcutaneous CO 5 O Monitor Model 860 Combination O CO Sensor 4474 00 Combination O5 CO Sensor for use with Split Membrane NOVADISK 8900 00 Combination O2 CO5 NOVADISK Kit Pre Soaked Split Membranes 30 per box Gas Calibrator 6633 00 Transcutaneous Gas Calibrator Model 868 8964 00 Low Point Calibration Gas 4 cylinders per case 8965 00 High Point Calibration Gas 4 cylinders per case Sensor Accessories 8285 00 Sensor Adhesive Rings 100 per box 8805 00 Sensor Adhesive Rings Large 100 per box 8888 00 Transcutaneous Sensor Contact Gel 15 ml bottles 6 per box 8353 00 Contact Medium Applicator 10 bottles per box Carbon Dioxide Sensor 6752 00 Carbon Dioxide Sensor 8383 00 Carbon Dioxide NOVADISK Kit 24 per box Oxygen Sensor 6754 00 Oxygen Sensor 8286 00 Oxygen NOVADISK Kit 24 per box 8200 00 Contact Gel Transcutaneous Oxygen Sensor 1 tube 60 ml 8231 00 Zero Oxygen Calibration Solution 50 vials per box Serial Analog Output amp Accessories 5702 00 Seiko DPU 411 Thermal
37. ary coil from transformer is rectified and filtered by D1 and before being input to the 5 volt regulator IC2 The regulated output of IC2 is sent to pin 25 of the 25 pin D connector via R27 on the rear panel in order to power the optional Analog Module The supply also powers The Dual RS232 Transmitter Receiver uses a single 5 volt supply pin 16 The two Receive Rx inputs can accept 30 volt levels while the two Transmit Tx lines output 9 volt levels The four level translators within the chip turn the RS232 level signals to 5 volt TTL CMOS compatible levels Two signals lines and transmit data from the CPU across the opto isolators IC32 and IC33 to Here the signals are level shifted to the standard 9 volt levels and sent to the rear panel connector The Receive RX line at J101 pin 2 and the Clear To Send CTS line at J101 pin 6 are input signals to the TCO M They are level shifted by and sent across the isolation barrier by IC31 and 6 respectively The transmit signal TX1 is dedicated to communication with the Optional Analog Module Catalog Number 9622 01 which when connected to the rear panel connector provides analog representations of signals and a pass through port for the RS232 connector The transmit output TXO from the CPU and the Receive and Clear To Send CTS inputs to the CPU are connected to the rear panel RS232 connector Calibrator Control See
38. d pins 3 4 network at IC10 pin 8 sets IC10 pin 2 to a logic low The ON OFF line is brought low each time the front panel power key is pressed This sends the output at IC11 pin 10 high This low to high transition clocks the 1 D flip flop portion of IC10 The output at IC10 pin 2 goes high and with each successive press of the power key this output toggles to the opposite level low or high A high turns the TCO M on and a low shuts it off While the output at IC10 pin 2 is high the MOSFET Q7 is turned on and pulls the gate of MOSFET Q8 to ground thus causing Q8 to conduct as well With Q8 conducting the currently active monitor power source either the AC power derived supply or the battery supply will flow through Q8 to the voltage input pin 7 of the Pulse Width Modulator IC9 The output IC9 pin 6 will oscillate at the frequency set by R13 and C15 This causes Q5 to switch on and off and provide a path to ground through the primary coils of T1 for the supply line or battery at T1 pins 9 amp 10 Current flowing in the primary is measured at IC9 pin 3 and the duty cycle of the pin 6 output will vary with the load on the transformer Current flow in the transformer primary induces current in the three secondary coils and creates the V5 volt analog supplies the VRAWI that powers the isolated RS232 circuitry and the 5 volt VCC supply that power the remaining circuits in the monitor The V5 and V5 supplies are rectified and
39. d by the heater control circuit The voltage output at IC17b pin 7 is proportional to the average heater current which is proportional to heater power also referred to as Local Power The scale factor is 0 5mW mv for V 4 9v This scale holds true for any heater resistance in the range of 35 3 5 ohms Note that a 5 decrease in V will result in a measured value that is 5 higher than the actual value Heater power to the electrode is limited to 800mW At 800mW the voltage will exceed the threshold at IC17A pin 3 causing IC17A pin 1 to switch positive This positive voltage will cause Q4 to turn on The heater circuit is forced to shutdown via Q2 until the heater power drops back below the 800mW threshold The lower voltage from IC17B causes IC17 pin 1 to switch back negative and the heater circuit is re enabled 3 3 6 Sensor Identification The TCO M has been designed to accept several types of Novametrix transcutaneous sensors The TCO gt M directly accepts the 4474 00 and 4474 39 sensors The 4474 39 sensor along with each adapter cable contain a unique identification resistor This sensor ID resistor connects to E3 and completes a voltage divider string along with RP1 pin 1 amp 2 The op amp ICI5C buffers the voltage across the ID resistor and presents it to the multiplexor The CPU samples the multiplexor and decides which type of sensor is being used The following nominal voltages at IC15C pin 8 correspond to the different sensor
40. densing 2 Model 860 Service Manual Rev 00 Description This manual is written for users of the Novametrix TCO M Transcutaneous monitor Model 860 The TCO gt M is a dual parameter noninvasive transcutaneous gas monitor It provides reliable continuous measurement displays and alerts for transcutaneous oxygen tension PtcO transcutaneous carbon dioxide tension PtcCO and sensor temperature Transcutaneous oxygen is measured with an oxygen sensor consisting of two parts 1 a modified Clark type polarographic sensor a silver anode electrolyte and an oxygen permeable membrane and 2 a heating section with two precision thermistors for measuring and controlling the sensor temperature When the sensor is subjected to oxygen the oxygen molecules diffuse through the membrane and create an electro chemical reaction which causes current to flow through the cathode An amplifier connected to the cathode measures the amount of current flowing and converts it to a value proportional to the oxygen tension at the sensor membrane interface This information is displayed as PtcO Transcutaneous carbon dioxide is measured with a sensor that utilizes a unique pH sensor based on the Stow Severinghaus principle The carbon dioxide sensor is composed of two parts 1 a carbon dioxide sensor consisting of a pH sensor reference sensor electrolyte and a carbon dioxide permeable membrane and 2 a heating section with two precision thermistors for measur
41. display backlight via Q16 and IC45 CALHIGH selects the high calibration gas on the Model 868 Calibrator 3 2 12 Watchdog Timer See page 1 on schematic The Watchdog Timer provides a system reset function in the event a hardware or software glitch occurs At power up and at specific intervals thereafter the microprocessor outputs a logic high to IC5 pin 6 WDOG Watchdog If the WDOG pulse does not appear at regular intervals as the result of a software or hardware problem the RC charges up and IC21 pin 8 goes low producing a low at IC16 pin 7 CPU RESET line The output at IC21D drives the RESET line of IC4 The Q14 output of ICA will drive the output of IC3B which in turn drives IC3A pin 5 a CPUINT CPU interrupt line This will cause the processor to reset The monitor then performs its power up self test routines and if the glitch has been cleared the monitor resumes normal operation If the problem still exists a self test or other error should be displayed 3 243 RS232 Serial Communication See page 3 on schematic The TCO 2M supports serial RS232 communication with external devices via the monitor s rear panel connector Signals to and from the rear panel RS232 connector are electrically isolated from the rest of the electronics by four opto isolators IC6 IC31 IC33 12 Model 860 Service Manual Rev 00 2533 CPU Interface Board Theory of Operation 3 2 14 3 2 15 3 2 16 Rev 00 An isolated second
42. e CSO at IC24 pin 2 is brought low With the monitor on PWRON will be low IC25 pin 13 see page 1 on schematic the RTC line will be brought low by the processor through IC22 pin 14 these lines drive RTCCS Real Time Clock Chip Select IC25 pin 11 low If at this time the RD IC24 pin 8 input is low a RTC Read occurs whereas a RTC Write will occur if the WR IC24 10 input is low Addressing is handled by A0 A3 pins 4 7 and data I O through D0 D3 pins 14 11 10 Model 860 Service Manual Rev 00 2533 CPU Interface Board Theory of Operation 3 2 8 3 2 9 3 2 10 Rev 00 Sound generator See page 2 on schematic A programmable tone generator IC27 is used to drive the monitor s audio circuit The tone generator is clocked by IC4 pin 9 Q1 The tone generator is enabled by the processor when IC22 pin12 is brought low While CE is low WR is brought low and data bus information including frequency pitch and attenuation volume is accepted by the tone generator The Ready signal 1 27 pin 4 goes low while accepting data and the processor is put into a Wait state until IC27 finishes its task then Ready returns high and the processor continues its operations The AUDOUT output at IC27 pin 7 drives the audio amplifier IC26 The amplifier output is coupled through capacitors C55 and brought to J109 as the SNDOUT Sound Out line The speaker which is mounted in the chassis is connected to J109 Keypanel Interface See
43. e MENU and keys Rotate T1 and T2 in unison and verify that the TB201 setting equals the displayed T1 and T2 values 0 1 0 2 at 37 0 Press the RUN key Select a monitor SET temperature of 42 5 C Set T1 and T2 to 42 3 Verify no temperature alert message is generated Select a monitor SET temperature of 42 0 C Set T1 and T2 to 42 0 Verify no temperature alert message generated Set T1 and T2 to 42 3 Verify a temperature alert message Temp gt 0 2 C is generated Install TF0013 test jack 40 ohm Enter the engineering screen by simultaneously pressing and holding the MENU and keys Verify the POW display is 000 mW 5 mW Press the RUN key Select a monitor set temperature of 44 0 C Enter the engineering screen by simultaneously pressing and holding the MENU and keys Verify the POW display is 450 mW and 700 mW Install TF0012 test jack 30 ohm Verify the POW display is 450 mW and 900 mW This completes the Front End board tests 40 Model 860 Service Manual Rev 00 Safety Tests Electronic Tests 7 4 Safety Tests Rev 00 The safety tests should be done to verify the leakage and isolation properties of the monitor The monitor should be fully assembled with no loose hardware exposed or damaged parts before testing Make sure that the test instruments used hipot and leakage testers are calibrated and conform to hospital guidelines Assemble the unit completely Apply 2 5KVAC for sixt
44. e VBACK supply RAM memory is retained when the monitor is turned off and it becomes available again when the monitor is turned back on The ROM at ICI7 is read when its Chip Enable line IC17 pin 22 is brought low by the ROMCS signal at IC25 pin 3 and the processor brings its Read line IC16 pin 63 low thereby activating the ROM Output Enable line at IC17 pin 24 Under these conditions ROM data from the specified address bus location is made available to the data bus for use by the processor The RAM IC20 is activated when its Chip Select line RAMCS IC20 pin 20 is brought low via IC25 pin 8 When the ME line at IC25 pin 5 is low and the inverse of address line A17 at IC25 pin 4 is low output pin 6 of IC25 will go low This in turn will drive IC25 pin 10 low with PWRON low at IC25 pin 9 IC25 pin 8 will be low RAMCS If at that time OE IC20 pin 22 is low a RAM Read occurs whereas a RAM Wirite will occur if WE IC20 pin 27 is low 3 2 7 Real Time Clock RTC See page 2 on schematic A Real Time Clock IC24 provides the TCO M the ability to time stamp collected printed trend data The 32 768 kHz crystal Y3 provides the timing signals for the clock chip 1C24 which is powered from the VBACK supply so that the clock can continue to keep time when the monitor is turned off provided the monitor s 12 volt internal battery is connected and maintains at least a nominal charge The RTC is activated when its Chip Select lin
45. e deo ede dot e Deb as 43 ef Ino ENTRE 44 Gas Calibrator Model 868 44 Section9 Accessories i wawaswan ahaa SE 45 Se ction 1 0 Parts A NE 47 860 MERI Lm 47 Model 868 54 Newer Calibrator 54 Olde r Galibrator intei um a ie dec ved b me dard ere Ee Fea Dur Te 55 viii Model 860 Service Manual Hev 00 1 Safety 1 1 Patient Safety Thelocation of the sensor on the patient should be changed periodically to minimize the risk of burns due to heating of the skin by the sensor The risk of such a burn is dependent upon the sensor temperature duration of application and physiological parameters including local perfusion body temperature and skin thickness TCO M monitor has electrically isolated inputs Patient leakage current flowing from the instrument to ground is limited to less than 10 WA at 120 V 60 Hz Patient isolation is greater than 10 MQ 2500 V rms at 60 Hz For maximum patient and operator safety the following procedures are recommended Keep the TCO M and its accessories clean Do not operate the TCO M when it is wet due to spills or condensation Do not touch the patient while making adjustments on t
46. ecision references are generated by IC19B Q6 and D16 for the Vref 42 048 v supply and by IC19A Q4 and D12 for the Vref 2 048 v supply Both of the precision references utilize the same method of placing the regulating diode in the feedback network of an operational amplifier For clarity only the positive reference will be discussed The ICL8069 D16 is the temperature compensated 1 22 volt reference used in the feedback loop of the op amp The ICL8069 is a temperature compensated but not current compensated device The gain of the op amp circuitry is approximately 1 7 times that of the ICL8069 voltage This gain is set by resistors R85 and RP5 2 and potentiometer VR7 The point at which VR7 is tapped sets the gain since it is connected to the inverting input of IC19B The voltage from TP4 and that of the non inverting input equals that of the zener voltage of D16 Capacitor C72 acts as a bypass and integrator to any noise across D16 Transistor is used as a current boost and low impedance source for the 2 048 volt output at TP4 Both voltage references have their ICL8069 s tied to the reference output of opposite polarity as a means of stabilization tracking and bias By placing the zener in the feedback loop of the op amp the output is held at a constant voltage Vz times the gain of the circuit This voltage will remain constant despite varying current draw Low Battery Voltage Shutdown See page 3 on schematic The CPU mo
47. ective material is expected to be returned to Novametrix within 10 days of being provided in order to avoid additional charges Exchanged material should be returned promptly and directly to Novametrix using the return paperwork and shipping label s provided Transferring return materials to local sales or dealer representatives does not absolve return responsibility Novametrix manufactures equipment that is generally user serviceable and can usually be repaired with the replacement of a plug in electro mechanical assembly by the clinical end user When repair parts are provided the recipient can call into Novametrix for on line replacement assistance and repair assurance In the event a replacement part requires increased technical capability Technical Support may request Biomedical assistance provide on site technical support or complete replacement equipment If the customer requires the return of their original product the exchange material will be considered loaner material and exchanged again after the customer equipment is repaired Novametrix promotes customer participation in warranty repairs should they become necessary This program allows for customer training and a smooth transition into self maintenance after warranty which can provide substantial cost savings on repairs throughout the product s life The Novametrix Technical Support Department can provide technical product support at a level appropriate to most customers p
48. ed by an internal 12 volt battery that is automatically charged when the monitor is powered from the AC line The green v icon on the front panel illuminates when the line cord is connected and the rear panel power switch must be in the ON position This indicates that AC line power is charging the battery A fully charged battery will power the monitor for over three hours While on battery power the display screen shows a battery icon that drains as the battery charge is depleted from a full charge to half charge to nearly depleted 77 The monitor may not power up on battery power if the battery is not sufficiently charged NOVAMETRIX TRANSCUTANEOUS MONITOR TCO2M MEDICAL SYSTEMS INC 9 Low battery Icon appears only when on battery power indicator As the battery voltage runs low 211 5 volts the battery indicator on the front panel will turn red At this point the AC line should be reconnected to charge the battery If the monitor continues to be powered from a battery in a low voltage situation at approximately 10 5 volts a continuous alarm sounds for sixty seconds while the battery indicator will flash red A BATTERY VERY LOW PLUG IN AC POWER message will appear If this alarm is ignored the monitor will shut down The AC line should be connected to the monitor to recharge the battery before this occurs AC Operation Reference the Overall Wiring Diagram see 6590 09 The AC line voltage en
49. eene 16 Sensor Identification u iret e tee tinte 16 Sensor Oxygen Value Measurement 2 enne 17 Sensor Carbon Dioxide Value Measurement 2 17 M ltipleXOE 5 5 1e a e RUPEE IUE 17 Model 860 Service Manual Vii Section4 Maintenance 19 Cleaning and Disinfecting sse 19 Monitor GaliDrator ic rte rh cete er aree a Ye vea Te a Yo 19 SENSOMS ern Gh vci a aa k dfc ced ifa W en h 19 Calibratot dene tree erra Dv rte aa i cras are or e v LEE ee vira vod 19 TCO2M Calibrator Model 868 20 Setting up the Calibrator u crie etre re rere e eR Rent 20 Disconnecting Gas Cylinders 21 Connect the calibratot u uu ttd al kusa decet eere ra ev cei Pe deis 21 Battery Maltternaree uoce Eee epit eb eee ee Roe bee goce pube sies eR Eget 21 USCS yuya io Woo Mrs ase Rr 22 Changing AC Mains Voltage 2 22 42 0 23 Assembly F RASA 25 Internal Assemblies roe at eve Pci Deve e 25 Front End and CPU Interface Keypanel Assembly 25 Replacing t
50. filtered by 8 Model 860 Service Manual Rev 00 2533 CPU Interface Board Theory of Operation 3 2 2 3 2 3 3 2 4 Rev 00 D4 D10 C10 C12 C68 and C69 The V5 is regulated by and the V5 by IC8 The VCC supply is rectified by D3 filtered by L1 C9 and C20 and fused at F1 and in addition a feedback loop to IC9 contains VR1 which is factory adjusted to produce a 5 00 volt 0 05 volt VCC supply measured under load Power Supplies See page 3 on schematic The secondary winding consisting of pins 1 and 2 are rectified and filtered by D1 and The rectified voltage at this point is approximately 7 volts DC and is regulated to 5 volts by IC2 This isolated supply powers the isolated portion of the opto isolators and the RS232 driver chip ICI The unregulated voltage VRAWI is sent to the rear panel connector J101 The backup voltage VBACK is regulated by IC12 from the VIN supply Capacitors C22 and C27 serve as filters and D17 allows VCC to power VBACK circuitry when the monitor is on At this point D18 is biased off so IC12 is idle When the monitor is turned off and VCC collapses D18 is then forward biased and IC12 now supplies VBACK circuitry D17 at this time is reverse biased and prevents power from reaching VCC Precision Reference Supplies See page 4 on schematic The circuitry of the Front End Board requires precise voltage supplies as references for the A D convertor and operational amplifier circuitry The pr
51. ften accompanied by a serial number suffix usually a letter for identification If a new serial number label is supplied check that the serial number is identical with the exception of a new letter to identify the software upgrade more suffix letters may be present if other changes are incorporated 4 8 Barometric Pressure Rev 00 The monitor measures the barometric pressure from an internal sensor This sensor has been calibrated at the factory and should not need readjustment with normal use To verify the barometric pressure or to adjust the barometric pressure if necessary perform the following With the monitor on press the MENU and keys simultaneously until the engineering menu appears Check the current barometric pressure using a calibrated barometer Verify the BAR value corresponds to the barometric pressure within one count If not adjustment of VR2 on the CPU Interface board may be necessary Refer to 2533 01 CPU Interface Board Tests on page 36 Model 860 Service Manual 4 27 4 Maintenance Barometric Pressure This page intentionally blank 28 Model 860 Service Manual Rev 00 9 Troubleshooting This section is intended as a guide in determining possible causes for monitor malfunctions The first section lists symptoms with probable causes If checking the causes offered does not remedy the problem contact Novametrix Service Department The second section lists messages that may appear on t
52. he display followed by the reason Not all of the messages indicate a fault but may indicate an improper operating condition or be a signal for required user interaction 5 1 General Rev 00 Below is a list of common symptoms that may occur with the TCO M Following each symptom is a list of probable causes In the event that none of the causes rectifies the symptom contact Novametrix Service Department for assistance Monitor does not turn on Attach the line cord set the rear panel power switch to I ON Check that the front panel u icon is illuminated Verify the proper line voltage setting on the power entry module located on rear panel Verify the fuses in the power entry module are good Check that the battery is sufficiently charged Check the fuses voltages on the Power Supply board Perform the Electronic Tests see section 7 Monitor intermittently turns off by itself If operating on battery power battery voltage insufficient recharge battery AC power intermittent if operating on AC power and battery is not sufficiently charged to power monitor with loss of AC power Monitor will not respond to keys CPU lockup power down monitor and power up Verify self test passes and monitor resumes normal operation Sensor will not calibrate Verify proper placement of sensor in calibrator Check cable connection from calibrator to the monitor Ensure good clean contacts check that the cable is not da
53. he TCO M monitor Whenever possible the TCO5M monitor should be connected to the same circuit as other equipment in use on the same patient Outlets that are on the same circuit can be identified by your hospital s engineering department n areas where electromagnetic devices 1 electrocautery used patient monitoring may be interrupted due to electromagnetic interference The PtcCO display reading CO2 is factory set to reflect the metabolic factor for pCO and the value is corrected only during patient monitoring not during calibration Refer to the User s Manual for more information Components of this product and its accessories which have patient contact are latex free Connect only Novametrix supplied transcutaneous sensors and gas calibrators to the gt Model 860 monitor front panel input connectors Refer to Accessories on page 45 for listings and catalog numbers 1 2 Contraindications Rev 00 n patients who are hemodynamically compromised transcutaneous gas values may no longer reflect arterial gas values due to changes in blood flow to the tissue Patients with extremely sensitive skin should be carefully evaluated prior to monitoring as sensor heat or adhesive ring application may cause skin irritation Skin irritation due to the adhesive ring can be minimized by loosening the adhesive with alcohol or water prior to its removal from the patient HALOTHANE INTERFERENCE Halotha
54. he battery charge current exceeds a preset limit IC3 pin 7 goes high which biases Q2 on this in turn shorts out R12 which affects the feedback control FB to ICI pin 1 With R12 shorted out the control resistors R14 and R13 set the output voltage to 14 4 volts When the charge current lowers IC3 pin 7 goes low which biases Q2 off this puts R12 back into the feedback control which now consists of R12 R13 and R14 setting the voltage to 13 2 volts When more than the maximum charge current flows through R3 IC3 pin 1 shorts pin 2 to ground that shuts off until its next switching cycle When the current reaches a safe level IC3 pin 1 allows to remain on The voltage switched by Q1 is also fed to IC2 as VCH Voltage Charge The output of this 5 volt regulator provides the LINEST Line Status signal to the main board With AC applied LINEST is high LINEST goes low when the AC is disconnected 3 2 2533 CPU Interface Board The following sections detail the operation of the CPU Interface board Refer to the CPU INTERFACE board schematic 2533 03 3 2 1 Power On Off Control Circuitry See page 3 on schematic The TCO 2M power on off control circuitry consists of the VBACK supply regulated by IC12 IC10 IC11 and the front panel power key When the battery or AC power is first applied to the power supply board via VIN J102 pin 1 VBACK goes to 5 volts This provides power to IC10 and IC11 and through the C26 an
55. he internal battery 26 Changing System Software 2 26 Barometric Pressure 27 SECTIONS Troubleshooting 2 7 11 u uu u uuu 29 lt 29 Display MeSSAQES RETE 30 Section6 Functional Tests 33 Equipment 33 System LeSfSau uy a a a Red ER ay PREDA 33 Section7 Electronic Tests 35 2726 01 Power Supply Board Tests 35 Equipment Required dence nere geret 35 E A DR TREAT AEDEM T 35 2533 01 CPU Interface Board 36 Equipment Required uuu u 2 e det i eedem ge eir ten te i e a to e ER u eget Een 36 Tesis asa MAL NM M NUR UR EM IE t 36 2534 01 Front End Board a e sS Du apas 38 Equipment Required uuu na n deans 38 38 SIMA Em 41 SECTIONS Specifications UU 43 Monitor Model 860 uuu en esce dete unies opc f
56. ing and controlling the sensor temperature When the sensor is subjected to carbon dioxide the carbon dioxide molecules diffuse through the membrane and react with the electrolyte This reaction alters the pH of the electrolyte solution which in turn changes the voltage across the pH and reference sensors Since carbon dioxide is the only gas that can affect the pH of the electrolyte there is a direct correlation between pH and the amount of CO present This relationship is expressed by the Henderson Hasselbach equation HCO pKa 1 cn G An amplifier measures this voltage change and converts it to a value corresponding to the carbon dioxide tension at the sensor membrane interface This information is displayed as PtcCO The following sensors be used with the TCO M Cat Sensor Type 4474 00 Combination O CO Sensor 4474 39 Combination Sensor 6752 Carbon Dioxide Sensor 6754 Oxygen Sensor Rev 00 Model 860 Service Manual 3 2 Description Conventions 2 4 Conventions The following conventions will be used throughout this manual Normal text will be shown in this type Message center displays menu titles and displays will be shown IN THIS TYPE The names of soft keys will be shown IN THIS TYPE The image of front panel keys hard keys will be displayed as their icon e g POWER key 2 2 Summary of Operation The front panel of the 7CO5M contains ha
57. ingle Parameter Sensor TCO 5M Monitor amp Single Parameter Sensor TCO M Monitor amp Combination Sensor Biomedical Engineering Service Test Kit 6914 00 9999 96 46 Model 860 Service Manual Service Test Kits include items and materials qualified service personnel may require to determine the functional integrity and or accuracy of the system Service Test kit TCO2M Transcutaneous Monitor Model 860 Focus Technical Training Seminar 1 day course For class schedules call 1 800 243 3444 Ext 2565 Rev 00 1 0 Parts 10 1 Model 860 Rev 00 ASSY 6590 00 02 MODEL 860 TRANSCUTANEOUS amp Oo MONITOR LINE PART NO REV QPA DESCRIPTION 0001 1003 32 03 1 LABEL SERIAL NUMBER 0002 1217 32 03 1 REPAIR LABEL 0003 4470 32 00 1 LABEL CAUTION GROUNDING 0004 6590 01 02 1 MAIN ASSY 0005 6590 04 0 TEST PROCEDURE SYSTEM 0006 6590 09 00 0 OVERALL WIRING DIAGRAM 0007 6590 23 00 1 USER S MANUAL 0008 6590 40 00 0 DESIGN DOCUMENTATION 0009 6590 75 00 0 DEVICE MASTER RECORD 0010 6590 43 00 0 DATA SHEET 0015 315032 1 LABEL 120 VAC 0016 600026 1 LINE CORD AC 7 1 2 FT HOSP GR PLUG 0017 315099 1 LABEL CE ASSY 6590 01 03 MAIN ASSY LINE PART NO REV QPA DESCRIPTION 0001 2533 01 03 1 CPU INTERFACE BOARD ASSY 0002 2534 01 02 1 FRONT END BOARD ASSY 0003 5664 10 04 1 CHASSIS 0004 5713 01 01 1 SPEAKER ASSY 0005 5714 01 02 1 B
58. ir Verify reasonable 158 5 and CO values 0 2 o OD a 11 Return to the engineering screen Verify the barometric pressure BAR equals the actual barometric pressure Rev 00 Model 860 Service Manual 33 6 Functional Tests System Tests This page intentionally blank 34 Model 860 Service Manual Rev 00 7 Electronic Tests The electronic tests verify the operation of the electronic circuits within the TCO M Model 860 These tests do not need to be performed on a regular preventative basis Perform these tests only if the monitor fails to operate as expected and or fails the Functional Tests The electronic tests should be performed by qualified service personnel The TCO M contains static sensitive devices Follow proper grounding precautions when handling the internal components to avoid damage from static discharge If the monitor does not pass the electronic tests remove it from use and contact the Novametrix Service Department for repair replacement assistance This procedure assumes the technician performs each step as indicated leaving the monitor in a known state prior to performing the next step If steps are omitted or performed out of order be sure that the monitor is set to the correct state before continuing 7 1 2726 01 Power Supply Board Tests 711 Equipment Required DVM calibrated 100 Q 5W resistor N5821 diode and 10 Q 10W resistor see diagram in
59. is connected to AC power and the rear panel power entry module switch is set to 41 ON Also indicates the bat tery is charging Alert indicator Flashes red to indicate an alert condition x Event key Press to mark an event in trend memory Two minute silence indicator Illuminates yellow when the audio has been temporarily silenced using the two minute silence feature Contrast key Press and hold to vary the contrast of the display Audio key Press to toggle two minute silence Press and hold for audio disable Soft key Five keys that function according to the command shown above each key in the display Model 860 Service Manual 2 5 2 Description Symbols NOVAMETRIX 2 MEDICAL SYSTEMS INC WALLINGFORD CONNECTICUT U S A RS232 NOVAMETRIX ACCESSORIES CAUTION FEDERAL U S A LAW RESTRICTS THIS DEVICE TO SALE DISTRIBUTION OR USE BY OR ON THE ORDER OF A LICENSED MEDICAL PRACTITIONER REPLACE FUSE V AER AVR 20V rh S B 2 100 CAUTION EQUIPMENT MUST BE GROUNDED AT ALL Ree N TIMES TO AVOID DANGEROUS ELECTRICAL SHOCK SEEN ini 100 120 200 A40 VAC 50 0 2 40VA 1 Ground stud Use to connect monitor s chassis to earth ground 2 Indicates fuse rating information for mains fuse RS232 port for Novametrix accessories 4 Power cord receptacle and power cord retaining clip Plug power cord into this receptacle U
60. ition the housing into the power entry module so that the desired voltage is furthest away from the switch see below SET FOR 100 120V OPERATION SET FOR 200 240V OPERATION 6 Close the fuse access door and verify the proper mains operating voltage is displayed MAINS OPERATING VOLTAGE 24 Model 860 Service Manual Rev 00 Assembly Exchanges Maintenance 4 6 Assembly Exchanges 4 6 1 4 6 2 Disassembly should be performed by qualified service personnel only Follow proper grounding precautions to avoid damage to internal components from static discharge Internal Assemblies Ensure that the monitor is OFF Disconnect the line cord and sensor Turn the monitor upside down and remove the four cover screws from the bottom cover Holding both case halves together flip the monitor right side up Carefully lift the top cover from the monitor use a gentle rocking motion to lift first one side and then the other side a little at a time Set the red alert lens aside along with the top cover for safe keeping The separate assemblies of the monitor can now be removed Front End and CPU Interface Keypanel Assembly Disconnect J102 power supply The Front End board is secured to the PCU Interface board via four 4 screws Loosen and remove the four screws using a side to side motion only gently pry the
61. maged Verify that the LEDs on the calibrator illuminate and a click is heard when the gasses are switched on Verify unexpired good membrane electrolyte solution Defective sensor use an alternate sensor Refer to User s Manual on proper sensor maintenance and use Verify proper membrane type Model 860 Service Manual 29 5 Troubleshooting Display Messages 5 2 Display Messages Certain operating conditions faults or requirements may evoke special messages on the display The messages and causes are listed below CALIBRATION MESSAGES SYMPTOMS CAUSES CAL ERROR CO2 OFFSET Calibration error CO offset out of range CAL ERROR CO2 SLOPE Calibration error CO slope out of range CAL ERROR O2 OFFSET Calibration error O offset out of range CAL ERROR O2 SLOPE Calibration error O slope out of range CAL ERROR CO2 TIMEOUT Calibration error CO threshold or stability error CAL ERROR O2 TIMEOUT Calibration error O threshold or stability error CAL ERROR BAROMTRC PRES Barometric pressure is less than 540 or greater than 800 mmHg CAL ERROR CALIB REMOVED The calibrator has been disconnected prior to the completion of the sensor calibration ERROR CALIBRATOR NOT A calibration has been requested but the monitor detects that the cali INSTALLED brator is not connected PARAMETER MESSAGES SYMPTOMS CAUSES O2 HIGH The measured value is above the upper limit setting
62. n sample the VBARRO line and compensate for offset voltages Once the offset voltages have been taken into account and IC38 is back in circuit ZPRESS low VR2 can be adjusted for a correct barometric pressure reading The processor automatically toggles the ZPRESS line to compensate for offsets as required adjusting VR2 for a proper displayed value against a known barometer is all that is required Analog to Digital Conversion See page 4 on schematic The various analog voltages from the Front End board s multiplexor are converted to digital values by the 18 bit analog to digital converter IC18 This is accessed by the processor when the ADC CS line in brought low and data request is transmitted on the DIN Data In Model 860 Service Manual 13 3 Theory of Operation 2534 Front End Board line The required information is transmitted to enable IC18 to select the desired signal from the multiplexor by selecting the appropriate address on the MUXA MUXC lines The selected analog signal is then output on the MUXOUT line and converted by IC18 The digital value is then transmitted back to the processor on the DOUT line Data Out 3 247 Temperature Control See page 2 on schematic The set temperature for the sensor is converted to an 8 bit word by the processor and is written to the B portion of the digital to analog converter IC29 This information is then converted to a voltage TEMP by IC30C This output voltage is sent to the Front End b
63. ne is the only known anesthetic gas affecting the reliability of transcutaneous oxygen PtcO5 measurement as demonstrated in in vitro testing of the Transcutaneous Combination O5 CO Sensor PN 4474 The affect of halothane on transcutaneous oxygen measurements in vivo has not been determined Halothane does not affect the transcutaneous carbon dioxide PtcCO5 measurement of the Transcutaneous Combination O CO Sensor No known anesthetic gasses affect the performance of the Transcutaneous Oxygen Sensor PN 6754 or the Transcutaneous Carbon Dioxide Sensor PN 6752 Model 860 Service Manual 1 1 sa fety Contraindications e PtcO levels in excess of 150 mmHg may cause drift of PtcCO portion of the 4474 00 Combination Sensor using 8900 Split Membrane NOVADISK This drift is not experienced with the 4474 39 Combination 2 Sensor and 8575 NOVADISK nor with the Transcutaneous Oxygen Sensor PN 6754 or the Transcutaneous Carbon Dioxide Sensor PN 6752 Indicates a potentially harmful condition that can lead to personal injury Explosion Hazard Do NOT use the TCO M in the presence of flammable anesthetics Use of this instrument in such an environment may present an explosion hazard Electrical Shock Hazard Always turn the monitor off before cleaning it Do NOT use a damaged sensor or one with exposed electrical contacts Failure of Operation If the monitor fails to respond as described do not
64. ng The Front End Board has a variety of safeguards built into the circuitry to monitor and control the sensor temperature The processor monitors the sensor for over temperature difference between thermistors and heater power dissipated If an error is detected the 860 will shut down the heater power to the sensor The operational amplifiers IC16A and IC16C form a window comparator whose thresholds are set to 50mv at pins 2 and 12 respectively Since the two thermistor circuits are identical there should be no voltage differential across them Resistors R54 and R55 are used to compare T1 and T2 Any voltage difference of 50mv 0 5 C or greater will cause one of the comparator outputs to switch to the positive rail This allows current to flow through R76 to charge up C41 If the fault condition exists for 5 to 8 seconds C41 will charge past the 2 048v at pin 6 and the output at pin 7 switches positive IC16B is now latched at the positive rail by the feedback loop of D3 and R56 No changes at IC16A IC16C or IC16D can change it The latch can only be reset by turning the entire monitor off and then back on The cap C40 at IC16 pin 6 prevents inadvertent latching on power up Model 860 Service Manual 15 3 Theory of Operation 2534 Front End Board If the fault lasts for less than 5 to 8 seconds C41 will discharge through R56 and D3 to the negative rail at IC16 pin 7 When IC16 pin 7 is at the positive rail two things happen First
65. nitors the battery voltage and provides the user with a low battery indicator 29 messages and alarms However if these are ignored a hardware circuit will take over and shut off the monitor before the battery is damaged The pulse width modulator IC9 requires at least 7 6 volts at pin 7 its voltage supply in order to operate This pin typically draws 10 mA of current The resistance of the R63 and Q8 combination is approximately 114 ohms This equates to a voltage drop of approximately 1 14 volts Therefore if the battery voltage drops under 9 0 volts approximately IC9 will not have sufficient voltage to operate and will shut down Shutdown of IC9 stops current flow through transformer T1 and the secondary supplies shut down effectively turning off the monitor When IC9 shuts down its VREF output at pin 8 is pulled low This forward biases D6 and causes the NAND gate output at IC11 pin4 to go high The 2 flip flop of IC10 is clocked and the high at the D2 input because is High is transferred to the Q2 output at pin 13 The high at pin 13 Sets the 1 flip Model 860 Service Manual 9 3 Theory of Operation 2533 CPU Interface Board flop causing the QT pin 2 output to go low This low shuts off both MOSFETs Q7 and Q8 thereby blocking any supply voltage from IC9 pin 7 Normally pressing the front panel power key would clock flip flop 1 at pin 3 and return the pin 2 output high but the high output at pin 13 keeps the 1 fli
66. nse Dry before use After cleaning ensure the selected sensor is mechanically sound with no broken frayed or exposed wiring Ensure that the connector is clean and dry with no signs of contamination or corrosion Do not use a broken or damaged sensor or one with wet contaminated or corroded contacts Do not immerse the sensor Do not attempt to sterilize the sensor Refer to the User s Manual for information on cleaning and remembraning the sensor 4 1 3 Calibrator Rev 00 Disconnect the calibrator from the TCO 2M if connected before cleaning The calibrator can be cleaned and disinfected with solutions such as isopropyl alcohol 70 solution 2 glutheralhyde solution or 10 bleach solution Then wipe with a clean water dampened cloth to rinse Dry before use Do not immerse the calibrator Do not attempt to sterilize the calibrator Model 860 Service Manual 19 4 Maintenance TCO2M Calibrator Model 868 4 2 TCO 5M Calibrator Model 868 The Calibrator Model 868 is intended to be used with the Transcutaneous Monitor Model 860 The calibrator is used to expose a transcutaneous sensor to two precision gas mixtures as part of the sensor s calibration The Monitor controls the actions of the Calibrator as well as providing power to the Calibrator Sensor port with cover Gas gauges Connection to TCO M NOTE Do not store the TCO M for more than three months with gas tank installed
67. oard and is combined with the thermistor voltage and the negative reference voltage to control the heater modulator 3 2 448 Battery Voltage Monitoring See page 2 on schematic The battery voltage from the power supply board is divided down by R47 and R48 and then buffered by IC19C This voltage VB is brought to the Front End board multiplexor for digital conversion and monitoring by the processor When the monitor is operating on battery power this line is monitored to determine the condition of the battery As the battery voltage runs low 11 5 volts the battery indicator on the front panel will turn red If the monitor continues to be powered from a battery in a low voltage situation a continuous alarm sounds for sixty seconds while the battery indicator will flash red A BATTERY VERY LOW PLUG IN AC POWER message will appear If this alarm is ignored the monitor will shut down The AC line should be connected to the monitor to recharge the battery before this occurs 3 3 2534 Front End Board The following sections detail the operation of the Front End board Refer to the FRONT END BOARD schematic 2534 03 3 31 Sensor Temperature Monitoring The transcutaneous electrodes used with the 5M are heated to help oxygen diffuse through the tissue to the sensor and to increase the response time to changes in skin surface carbon dioxide levels The sensors contain two precision thermistors that are used to monitor and control
68. on the calibrator cable connector with the red dot on the monitor s front panel calibrator input connector and pushing the calibrator connector into place It clicks into place when correctly seated 4 3 Battery Maintenance If the monitor has not been used or powered by AC for an extended time 3 months or more allow the battery to charge for 12 hours before use The monitor may not power up on battery power if the battery is not sufficiently charged To charge the battery connect the power cord see below and set the rear panel power switch ON I Check that the front panel AY icon is green Allow the battery to charge for 12 hours to ensure a fully charged battery in the event that battery power is required sf NOVA METRIX MEDICAL SYSTEMS INC 217 WALLINGFORD CONNECTICUT U S A RS232 NOVAMETRIX ACCESSORIES REPLACE FUSE 5 MARKED 500 120 NOTE Be sure to dispose of batteries in accordance with local laws Never dispose of batteries in a fire The AC power cord line shipped with monitors for North America is a Hospital Grade SJT style cord with a 120 VAC plug All other style power line cords shipped with monitors for Europe are the European style with a 220 240 VAC plug All other style power line cords as required by the country of destination are provided by the distributor of that country 1 The internal battery will slowly discharge over long pe
69. oxide 0 255 mmHg 0 25 5 kPA Oxygen 0 800 mmHg 0 99 9 kPA Displayed pCO is compensated for metabolic factors related to the temperature effect and CO production CO and limit alerts audible and visible User selectable continuously displayed retained in memory Two minute alert silence with LED indicator Audio Off with LED indicator user can disable if needed User selectable 37 45 C in 0 5 C increments Can be continuously displayed Audible amp visible alarm if actual set temperatures differ by 20 2 Two fully independent thermistors monitor and control temperature Heater power shutdown with audible amp visible alarm at over temp 45 5 C or if thermistors differ by gt 0 5 Automatically tracks sensor site duration provides audible and visible alarms automatic shutdown of heater power once timer expires User selectable durations in 0 5 hour increments up to 5 8 or 12 hour maximum plus off The power required to maintain sensor temperature is measured and displayed Range 0 800 mW User selectable power reference point allows for quick power trend analysis LPR Continuously displayed user selectable scalable real time 10 20 30 minute trends of CO O gt or Local Power Battery backed 24 hour trends 8 second resolution Trend Histogram displays 30 min 2 4 8 12 hours Standard RS232 serial outputs NovaCARD computer printer others Optional Analog Module and LP Power 100 1
70. p flop Set and the power key has no effect If at this point the AC line is reconnected MOSFET Q8 continues to block current from IC9 pin 7 and the monitor remains off Connecting the AC line does however send the LINEST signal high This line is brought to IC10 pin10 where it resets the 2 flip flop sending IC10 pin 13 Low and removing the set condition from flip flop 1 Now if the front panel power key is pressed flip flop 1 is clocked IC11 pinll goes high MOSFETs Q7 and Q8 turn on the supply to IC9 pin 7 is restored the pulse width modulator restarts energizes T1 and the monitor turns back on 3 25 Microprocessor See page 1 on schematic A Hitachi HD64180RP microprocessor directs the actions of the TCO M The processor IC16 is operated at 6 144 MHz half the12 288 MHz frequency of crystal Y 1 has an 8 bit data bus and a 19 bit address bus the 860 uses only 18 bits The microprocessor also provides two asynchronous serial communication channels a clocked serial I O port and various interrupt and control signals The 5 volt VCC supply to the processor is first sent through inductor FB1 a ferrite bead before powering the chip at IC16 pin 32 3 2 0 Memory The TCO M system software is located at IC17 a 27C010 EPROM The 128 byte RAM IC20 stores trend data system power up settings calibration parameters serial output parameters etc and provides an area for system memory requirements Since IC20 is powered from th
71. page 2 on schematic The 10 keys on the 7CO M front panel are connected through a ribbon cable at J104 Each key except power is connected to an 8 bit latch either IC14 or IC15 When any of these keys are pressed the corresponding latch input is brought low The processor continually reads the status of these latch outputs the RDKEY enables IC14 when low and the RDKEY 2 line enables IC15 when brought low The power key ON OFF signal is sent through J104 pin 15 The AC Line Status signal LINEST is generated by the power supply and is high 5 volts when the monitor is connected to the AC line and the rear panel switch is set to I This 5 volt level is sent to the green v indicator on the keypanel via J104 pin 16 The LINEST signal is also input to the latch at IC14 pin 8 so that the CPU can detect if the unit is operating on AC line power IC14 pin 8 high or on battery power IC14 pin 8 low Diode D9 keeps current from back feeding into IC14 when the monitor is turned off but still connected to the AC line The TML Two Minute Lamp AOL Audio Off Lamp ARL Alert Reset Lamp and BTL Battery Lamp LEDs are driven by the 8 bit latch IC13 When each of the corresponding signals is driven high the appropriate LED on the keypanel is illuminated Display Interface See page 1 on schematic The display is connected at J107 see page 1 on schematic It is controlled by the processor using the RD Read WR Write and DISPCS Display Chip
72. r s thermistors deviate more than 0 5 C from each other MONITOR ERROR MAXIMUM POWER gt 5 MIN The maximum power allowable has been delivered to the sensor for 5 minutes SENSOR DISCONNECTED The monitor detects that the sensor has been unplugged or discon nected MONITOR ERROR INVALID SEN SOR ID The monitor has detected an invalid type of sensor MONITOR ERROR HEATER DISABLED The monitor has disabled the heater circuitry from the sensor SOFTWARE HARDWARE MESSAGES MONITOR ERROR BAD MONITOR STATE SYMPTOMS CAUSES Software error MONITOR ERROR SOFTWARE ERROR 1 Software error MONITOR ERROR RAM SELF TEST FAILED Power up RAM test error MONITOR ERROR ROM SELF TEST FAILED Power up ROM test error MONITOR ERROR 10ms INT TIM EOUT Hardware interrupt overrun MONITOR ERROR 250ms INT TIMEOUT Software interrupt overrun Model 860 Service Manual 31 5 Troubleshooting Display Messages SOFTWARE HARDWARE SYMPTOMS CAUSES MESSAGES MONITOR ERROR ILLEGAL INT1 INT MONITOR ERROR ILLEGAL INT2 INT MONITOR ERROR PRT1 INT MONITOR ERROR DMAO0 INT MONITOR ERROR ASC1 INT MONITOR ERROR NMI INT MONITOR ERROR ILLEGAL OPCODE FETCH Software errors contact Novametrix Service Department MONITOR ERROR BAD STACK POINTER MONITOR ERROR STACK OVER FLOW MONITOR ERROR CORRUPT SYSTEM MMU MONITOR ERROR F
73. rd keys dedicated front panel keys soft keys menu dependent keys and icon symbols illuminating indicators When the monitor is powered up and passes its self test it will display a screen similar to the one below Factor PtcCOs Parameter Information Real Time Waveform Display upper lower limits Trend Parameter amp Display Time 18 min Alert Limits Sensor Temperature Battery Icon Menu soft key identifiers The display is arranged in different sections parameter information for PtcCO and PtcO real time waveform display and the menu display A full screen trend display is also available The first menu to appear in normal operation is the main menu from here all other sub menus are accessed by pressing particular soft keys 4 Model 860 Service Manual Rev 00 Front and Rear Illustrations 2 3 Front and Rear Illustrations Rev 00 Display Description Red Alert Bar TCO M Calibrator Model 868 connection Sensor input Power button Press to turn the monitor on off used on some models Audio disable icon Flashes yellow when the audio has been disabled LOW BAT Red when battery is near depletion A similiar icon appears in the dis play when the monitor is run ning on battery power and gives a visual indication of the charge left on the battery Alert Reset key Press to acknowledge and reset alerts AC indicator Green when the monitor
74. riods of non use Rev 00 Model 860 Service Manual 21 4 Maintenance Fuses 4 4 Fuses The rear panel power entry module indicates the AC line voltage setting for the monitor Check that the voltage is correct before attaching the line cord and powering the monitor The TCO 2M can be set to operate from 100 120 VAC 50 60Hz or 200 240VAC 50 60Hz Refer to the following sections for fuse replacement and changing the mains voltage setting CAUTION Replace fuses with the same type and rating Verify proper fuse value for AC voltage setting see table below AC Voltage Fuses Slo Blo 100 120 VAC 0 5 A 250V 200 240 VAC 250mA 250V 1 Check that the monitor is OFF 2 Set the rear panel power entry module switch to OFF O Remove the line cord from the power entry module if connected 3 Using a flat blade screwdriver pry the fuse access door open to expose the fuse housing Note the orientation of the fuse housing this determines the mains operating voltage eun POWER ENTRY MODULE FUSE HOUSING FUSE ACCESS DOOR 22 Model 860 Service Manual Rev 00 Changing AC Mains Voltage Maintenance 4 4 Pry the fuse housing out from the power entry module NOTE 5mm X 20mm fuses are installed toward the back of the fuse housing as shown 3AG TYPE 5 X 20mm TYPE 5 Replace the blown fuse
75. rotocol and budget requirements Please contact the Technical Support Group at Novametrix for additional information Additional Novametrix Technical Support Programs Focus Series Technical Training Seminars Test Equipment and Test Kits Service Contract Part Insurance Plans On Site Technical Support 24 hr telephone support Demand Services Flat rate parts exchange Flat rate return for repair Time and Material Full warranty discounted replacement sensors Rev 00 Rev 00 gt Contents 1 LEITET TINI 1 Patient Safety uuu al c e n n d e e e A 1 GontralndiCatiOris Det e h aaa Q aayqa tees 1 Section2 Description nne DD anaki andanu raana nanai 3 GONVENTIONS 4 Summary of Operationen ren ee eee tented le eae 4 Front and Rear Illustrations 5 iie erc a 6 Sections Theory of Operation l U U u uuu u uuu 7 2126 Power Supply Board aie better Foe er AR 7 AC Mains and Battery Operation Overview en 7 AG OperallOn x mde itecto dd n ege Le teet niet Epi deett 7 2533 GRU Interface Board iet ettet tede eei Senn 8 Power On Off Control Circuitry 8 Power Supplies tr eire ee re IY vn eg
76. s with the proper type and rating 6 Re install the fuse housing When positioning the housing into the power entry module ensure that it is oriented correctly Press the fuse housing back into the power entry module 7 Close the fuse access door and verify that the proper mains operating voltage is displayed AC OPERATING VOLTAGE 4 5 Changing AC Mains Voltage Depending upon which power supply assembly is installed in the monitor replacing the fuses and adjusting the mains supply voltage will differ Determine which assembly is installed then follow the appropriate instructions CAUTION Replace fuses with the same type and rating Verify proper fuse value for AC voltage setting see table below Mains Voltage Fuses Slo Blo Part Number 100 120 VAC 0 5 A 250V 515023 200 240 VAC 250mA 250V 515033 1 Check that the monitor is OFF 2 Set the rear panel power entry module switch to OFF O Remove the line cord from the power entry module if connected Rev 00 Model 860 Service Manual 23 4 Maintenance Changing AC Mains Voltage 3 Using a flat blade screwdriver pry the fuse access door open to expose the fuse housing Pry the fuse housing out from the power entry module x FUSE HOUSING FUSE ACCESS DOOR 4 Installthe proper type and rating fuse for the mains voltage setting required 5 Pos
77. se only hospital grade three wire plugs for connection via supplied power cord 5 Line Power Mains Switch Set to allows AC Mains to power the monitor set to O switches AC mains power off 6 Voltage select fuse compartment Sets the mains operating voltage and houses mains fuses NOTE The AC power line cord shipped with monitors for North America is a hospital grade SJT style cord with a 120 VAC plug All power line cords shipped with monitors for Europe are the european style with a 220 240 VAC plug All other style power line cords as required by the country of destination are provided by the distributor of that country 2 4 Symbols Equipotentiality Connection to monitor s chassis Patient Isolation Identifies patient isolation connection as type BF Protective earth ground connection High voltages present Attention Consult manual for detailed information EA Mains Fuse Mains fuse rating for replacement fuses Mains Power AC mains switch ON connection to mains OFF disconnection from mains o B gt 6 Model 860 Service Manual Rev 00 3 Theory of Operation 3 1 2726 Power Supply Board 3 1 1 Rev 00 The Power Supply Board contains the circuitry needed to charge the battery and to convert the necessary DC voltage from the AC line Refer to the POWER SUPPLY schematic 2726 03 location AC Mains and Battery Operation Overview The TCO M is power
78. sitive black is negative Connect the harness to J302 on the power supply board NOTE Be sure to dispose of old battery in accordance to local laws 4 Replace the battery bracket Reassemble the monitor 4 7 Changing System Software New software releases may be made available from time to time These new releases may add features or be maintenance upgrades The system software is contained in EPROM IC17 on the CPU Interface board CAUTION Be sure to observe proper grounding procedures to avoid possible damage to electronic circuits from static discharge To install a new EPROM 1 Ensure that the unit is off and unplugged Remove the top cover as instructed in Assembly Exchanges on page 25 26 Model 860 Service Manual Rev 00 Barometric Pressure Maintenance 2 Remove the Front End Board to gain access to IC17 mounted in a socket Refer to step 4 6 2 2 J101 G 1102 EPROM 19 o 5 s Front End Board Using an EPROM extraction tool or small flat blade screwdriver carefully pry IC17 from its socket Place the new EPROM to the socket so that pin 1 is properly aligned Press the new EPROM firmly into the socket check for bent pins ensure that all the pins are properly inserted into the Socket Replace the Front End board and reassemble the monitor Replace old serial number label with new one if supplied New software upgrades are o
79. t T1 to 42 4 check IC16 pin 14 is negative return T1 to 42 9 Set T2 to 42 4 check IC16 pin 1 is negative return T2 to 42 10 Set T1 and T2 to 43 0 11 Set T1 to 43 6 check IC16 pin 14 is positive return T1 to 43 12 Set T2 to 43 6 check IC16 pin 1 is positive return T2 to 43 13 Set T2 to 45 3 check IC16 pin 8 is negative return to 43 Set T2 to 46 3 check IC16 8 is positive return to 43 14 Disconnect the TB201 and Verify that IC16 pins 1 and 14 are negative Reconnect the TB201 15 Set T1 and T2 to 43 0 Select a monitor set temperature of 45 0 C Rev 00 Model 860 Service Manual 39 Z Electronic Tests 2534 01 Front End Board Tests 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Verify J108 13 goes low Q4 collector goes high Perform each step listed below and after a 5 second delay check that J108 13 goes high gt 3 0V Q4 s collector goes to 0 v 100 mv and check that the listed error message appears After each step set T1 and T2 to 43 verify the results do not change and then recycle the system power TB201 Error Message Set T1 to 43 6 MONITOR ERROR THERMISTORS gt 0 5 C or MONITOR ERROR TEMP ERR HTR OFF Set T2 to 43 6 MONITOR ERROR THERMISTORS gt 0 5 C or MONITOR ERROR TEMP ERR HTR OFF Set T1 and T2 to 46 3 MONITOR ERROR TEMPERATURE gt 45 5 C Enter the engineering screen by simultaneously pressing and holding th
80. tallation Novametrix obligations under this guarantee are limited to repairs or at Novametrix option replacement of any defective parts of our equipment except fuses batteries and calibration gasses without charge if said defects occur during normal service Claims for damages during shipment must be filed promptly with the transportation company All correspondence concerning the equipment must specify both the model name and number and the serial number as it appears on the equipment Improper use mishandling tampering with or operation of the equipment without following specific operating instructions will void this guarantee and release Novametrix from any further guarantee obligations Service Department For factory repair service call toll free 1 800 243 3444 In Connecticut call Collect 203 265 7701 FAX 203 284 0753 http www novametrix com Email techline novametrix com Caution Federal U S A law restricts this device to sale distribution or use by or on the order of a licensed medical practitioner Copyright 1997 Novametrix Medical Systems Inc This document contains information which is proprietary and the property of Novametrix Medical Systems Inc and may not be reproduced stored in a retrieval system translated transcribed or transmitted in any form or by any means without prior explicit written permission from Novametrix Medical Systems Inc Model 860 Service Manual Vi Model 860
81. ters the monitor at the rear panel Power Entry Module PM301 This device contains a built in RFI power line filter a double pole single throw switch that opens and closes both AC input lines fuses and an input voltage selection key Model 860 Service Manual 7 3 Theory of Operation 2533 CPU Interface Board The filtered switched and fused output of the Power Entry Module is fed to the primary coils of the system transformer T301 Reference the Power Supply schematic 2726 03 The secondary output from T301 is rectified by D1 bridge rectifier and filtered by C1 The loaded DC voltage at this point is approximately 20 volts The 20 volts DC is fed to the battery charging regulator pin 5 through Q1 Biasing for Q1 is accomplished by D2 and R2 when AC power is applied When running on battery power Q1 is biased off by R1 R2 and D3 This prevents the battery from trying to power the battery charger regulator Power to IC2 is also removed this informs the monitor of the loss of AC via the LINEST line The output of switching regulator pin4 is rectified and filtered by D4 C4 and L1 then fed to the battery through current sense resistor R3 and fuse F302 to J302 pin 1 VBAT The battery float charge voltage is maintained at 13 2 volts except for fast charge that is regulated at 14 4 volts The output is also monitored for over current conditions These parameters are controlled by IC3 and associated circuitry When t
82. the sensor temperature The first thermistor T1 is connected between E5 and E6 while the second thermistor T2 is connected between E7 and E2 The wiring is kept separate to avoid a defect in one thermistor from affecting the other The resistors R19 and R116 and thermistor 1 form a voltage divider The thermistor resistance and the voltage drop across the thermistor decreases as the electrode is heated This voltage is monitored by IC8 whose gain and offset provide a linear output TP5 between 2 048v at 30 C and 2 048v at 50 C The inductor L2 in the divider string provides noise filtering of electro surgical unit ESU interference The thermistor 2 circuit works in the same manner except that the voltage polarities TP4 are reversed 2 048v at 30 C and 2 048v at 50 C This circuit redundancy affords the TCO2M an added measure of patient safety 3 32 Sensor Heater Control The heater element in the head of the sensor is connected to E8 and E9 and has a nominal value of 35Q Heater current flows from the V5 supply through L4 the heater element then returning through L5 FET Q2 and through the 1Q resistors R34 and R35 to ground The actual temperature of the electrode as measured by thermistor 1 at TP5 is compared with the set temperature from the DAC on the CPU interface board If the actual temperature is less than the set temperature as is normally the case on power up then the summing junction of IC15 pin 13 will
83. ts This test is to be performed with the TCO 2M top cover removed all the board assemblies are to remain intact Turn the gt on Measure TP2 for 2 040 Vdc 1 mV Use as the ground reference Adjust VR1 if necessary NOTE Make sure there is no probe or test jack connected to the monitor when making this measurement 38 Model 860 Service Manual Rev 00 2534 01 Front End Board Tests Electronic Tests 7 2 Installthe ID Test Jack and verify the correct ID is displayed for each switch setting Switch Setting ID Open 74 00 53 6K 1625 19 1K 1957 6 81K 74 39 Short INVLD Verify Q5 s collector is low for all switch positions except Short where it should be high after a five second delay Verify Monitor Error Invalid Sensor ID is displayed and an audio alert is heard when Q5 s collector goes high 3 Change the ID Test Jack setting from short to 6 81K Verify Q5 s collector remains high Turn the TCO M off 4 Remove the ID Test Jack and connect the TB201 using the 4478 01 cable 5 Turn the TCO2M s power on and monitor TP5 Verify the following T1 Setting Voltage 37 0 614 10mV 40 0 000 10mV 45 1 024 10mV 6 Monitor TP4 Verify the following T2 Setting Voltage 37 0 614 10mV 40 0 000 10mV 45 1 024 10mV Note Push the CAL key followed by the SET key Use the S7 arrow keys to change the monitor s set temperature 7 Set T1 and T2 to 42 0 8 Se
84. upply rear panel assembly connect the power cable to J302 on the power supply board reconnect the power cable to the CPU interface board NOTE Be sure all connections are oriented properly to avoid damage to the unit 7 2 2533 01 CPU Interface Board Tests 721 Equipment Required DVM calibrated 7 2 2 Tests This test is to be performed with the TCO5M top cover removed all the board assemblies are to remain intact 1 Set the rear panel power switch on the TCO M to and verify the green AC ON v LED on the front panel illuminates 36 Model 860 Service Manual Rev 00 2533 01 CPU Interface Board Tests Electronic Tests 7 2 Use the back side of R4 R5 or R6 located to the right of T1 for ground reference Measure the cathode of D18 and verify 4 3 to 4 7 Vdc REAR
85. use it until the situation has been corrected by qualified personnel Fire Hazard The TCO M and its sensors should not be exposed to elevated oxygen levels at elevated pressures Use of this instrument in such an environment may present a fire hazard For installation where the integrity of the external protective earth conductor arrangement is in doubt the equipment should be operated from its internal battery only No user serviceable parts inside Refer servicing to qualified service personnel Indicates a condition that may lead to equipment damage or malfunction Federal U S A law restricts this device to sale distribution or use by or on the order of a licensed medical practitioner No tension should be applied to the sensor cable e Avoid storing the monitor and sensors at temperatures less than 10 C or greater than 4 55 C 14 F or 2131 F Do NOT immerse the monitor or sensors in liquids Do NOT sterilize the monitor or the sensors Electric Shock Hazard Do NOT remove covers or panels Refer servicing to qualified service personnel Connect the line cord only to a grounded hospital grade outlet For continued protection against fire hazard replace fuses only with those of the same type and rating No user serviceable parts inside Refer servicing to qualified service personnel Operate at temperature between 10 C to 40 C 50 104 F 90 relative humidity non con
86. y seconds between earth ground and the shorted hot and neutral of the line cord Verify there is no arcing or leakage Apply 4 0KVAC for sixty seconds between the shorted probe and the shorted hot and neutral of the line cord Verify there is no arcing or leakage Apply 1 5KVAC for sixty seconds between the shorted probe and earth ground Verify there is no arcing or leakage Measure the unit s leakage current as follows Verify a leakage current less than 25uA Monitor grounded Monitor ungrounded Monitor ungrounded with polarity reversed Note For units operating at gt 200Vac the maximum leakage current is 50uA Using the shorted probe measure the patient leakage current to the AC line Verify a leakage current less than 10uA Note For units operating at gt 200Vac the maximum leakage current is 20UA Model 860 Service Manual 41 7 Electronic Tests Safety Tests This page intentionally blank 42 Model 860 Service Manual Rev 00 Specifications These specifications for the Novametrix TCO M Transcutaneous CO O Monitor Model 860 are listed for informational purposes only and are subject to change without notice 8 1 Monitor Model 860 Measurement Range Metabolic Correction Parameter Alerts Alert Silence Temperature Section Site Timer Local Power Real Time Trends Trend Histogram Memory External Devices System EMC Emissions EMC Immunity Rev 00 Carbon Di

Service Manual Model 860 - Frank`s Hospital Workshop

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