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Colin Press-Mate 8800 Series Service Manual Download Page 75

9.2

Accessory Parts List: 8800

COLIN MEDICAL INSTRUMENTS hours of operation are 8 a.m. to 6 p.m. (Central Standard Time), Monday
through Friday.  Call us for pricing or additional information at 800-829-NIBP (6427).

Description

Order #

Accessories

Wall Mount

C0610020A

Operation Manual 8800 Series

C1730020A

Service Manual

C1730016B

Inservice Videotape

Call

3.5m gray adult hose

0450010B

3.5m green neonatal hose

0450012B

Printer paper, box (5 rolls)

C1780009A

NIBP calibration test kit

C0690003A

Fetal monitor interface cable

C7110001A

Dust cover

XC1810012A

Description

#/Pkg

Order #

Adapters: 1-Tube to 1 Tube

Hewlett Packard

25

C0430021A

Physio-Control

25

C0430023A

Spacelabs

25

C0430025A

Marquette (new)

25

C0430027A

Marquette & Propaq (old)

25

C0430029A

1-Tube to 2-Tube Reusable/Disposable Cuffs

Colin, Datascope
N.A.D. (new style-Critikon)

10

C0430022A

Colin, Datascope
N.A.D. (old style-Critikon)

10

C0430024A

Dinamap, Spacelabs                       2 sets/10 sets C0430030A

Hose Connectors: 1-Tube to 2-Tube Neonatal

Colin, Datascope N.A.D.

10

C0430033A

Colin, Datascope N.A.D
(without fittings)

10

C0430034A

Reusable Cuff Covers

Infant

1

C0430041A

Child/small adult

1

C0430042A

Adult

1

C0430043A

Large Adult

1

C0430044A

Thigh

1

C0430045A

Description

Order #

Order #

Reusable Blood Pressure Cuffs

1-tube

2-tube

Infant

C0430001A

C0430002A

Child/Sm. adult

C0430003A

C0430004A

Adult

C0430007A

C0430008A

Large adult

C0430009A

C0430010A

Thigh

C0430011A

C0430012A

Cuff Assortment Packs

1-tube

2-tube

Reuse. Assort. Pk.

C0430091A

C0430092A

Reuse. Adult Pk.

C0430093A

C0430094A

Reuse. Child Pk.

C0430095A

C0430096A

Disp. Assort. Pk.

C0400081A

C0400082A

Disposable Cuffs

1-tube

2-tube

Large adult/thigh

C0400011A

C0400012A

Adult

C0400013A

C0400014A

Pediatric

C0400015A

C0400016A

Neonate (#4)

C0400017A

C0400018A

Small pediatric

C0400019A

C0400020A

Neonatal Cuffs

1-tube

2-tube

#1

C0400001A

C0400002A

#2

C0400003A

C0400004A

#3

C0400005A

C0400006A

#4

C0400007A

C0400008A

#5

C0400009A

C0400010A

Reusable Cuff Bladders

1-tube

2-tube

Infant

C0430053A

C0430054A

Child/small adult

C0430055A

C0430056A

Adult

C0430057A

C0430058A

Large Adult

C0430059A

C0430060A

Thigh

C0430061A

C0430062A

9-4

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Summary of Contents for Press-Mate 8800 Series

Page 1: ...te 8800 Series Automatic Non Invasive Blood Pressure Monitor 8800 8800P 8800G 8800GP 8800F 8800FP 8800MS 8800MSP 8800SAT 8800SATP Caution Federal law restricts this device to sale by or on the order o...

Page 2: ...e and non invasive monitoring Colin has wisely invested in studies conducted in collaboration with leading U S research institutes and universities These projects have resulted in a number of signific...

Page 3: ...Assembly 3 3 3 4 Cuff Placement 3 4 Section 4 Special Control Settings 4 1 Setting the Blood Pressure Measurement Interval 4 1 4 2 Alarms 4 2 4 3 Setting the Clock 4 3 4 4 Alarm ON OFF 4 4 4 5 Initia...

Page 4: ...t 6 9 6 22 Front End Switch 6 10 6 23 Signal Conditioning 6 10 6 24 Analog to Digital Conversion 6 10 6 25 Calibration Self Check Circuitry 6 11 6 26 Other Inputs 6 11 6 27 Seven Segment Display and A...

Page 5: ...6 PCB 8800IR 10 8 10 7 PCB Genius 10 9 10 8 PCB FILAC 10 10 Section 11 Specifications for Press Mate Genius and Filac 11 1 Environmental Requirements 8800 11 1 11 2 Functional Specifications 11 1 11...

Page 6: ...et with high and low limits The memory storage capacity of the press Mate is 400 lines of data more than any other non invasive blood pressure NIBP stand alone monitor The monitor is available with or...

Page 7: ...n the course of warranty service COLIN may but shall not be required to make engineering improvements to the Warranted Product or part thereof 1 6 Loaner Policy Purchaser is responsible for any damage...

Page 8: ...properly disassembled serviced or reassembled by anyone other than COLIN unless authorized by COLIN COLIN makes no warranty a with respect to any disposable products or any other products that are not...

Page 9: ...or consecutive blood pressure monitor ing Alarms SET HIGH LOW MUTE Set Sets LCD in alarm mode High Sets high alarm limit Low Sets low alarm limit Mute Silences audible alarm List Scrolls up or down to...

Page 10: ...xygen Saturation Pulse Rate 2 SpO2 Pulse Search Low Battery Printer ON button Printer paper advance button Date Day Battery check button Measure button Percent oxygen saturation Pulse search indicator...

Page 11: ...ORP SAN ANTONIO TX USA USING DOMESTIC AND IMPORTED PARTS U L LISTED MEDICAL EQUIPMENT 24T2 LR83689 STD C22 2 NO 125 RISK CLASS 2G PRINT MODE PRINT DATA INTERFACE ON OFF ON OFF LIST TREND GRAPH DISPLAY...

Page 12: ...ACLE MARKED HOSPITAL ONLY OR HOSPTAL GRADE WARNING FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE WITH SAME TYPE RATING OF FUSE AC SOURCE R F 100054 MODEL 8000F SERIAL NO MANUFACTURED BY COLIN M...

Page 13: ...3 Ah CAUTION CROUNDING RELIABILITY CANONLYBEACHEIVED WHEN THIS EQUIPMENT ISCONNECTEDTO ANEQUIVALENT RECEPTACLE MARKED HOSPITAL ONLY OR HOSPTALGRADE WARNING FORCONTINUED PROTECTION AGAINST FIRE HAZARD...

Page 14: ...OR POLE TORSION KNOB ALARM MUTE ALARM CONTRTOLS SYSTOLIC HIGH ALARM SYSTOLIC LOW ALARM INTERVAL SWIITCH PULSE LEVEL INDICATOR START STOP SWITCH POWER SWITCH DIASTOLIC DISPLAY PULSE DISPLAY CUFF HOSE C...

Page 15: ...DE PRINT DATA INTERFACE ON OFF ON OFF LIST TREND GRAPH DISPLAY MEASUREMENT MODE ADULT PEDI NEONATAL NOTICE 1 REPLACE BATTERIES APPROXIMATELY ONCE EVERY YEAR 2 REFER TO THE MANUAL FOR PROPER PLACEMENT...

Page 16: ...cord and cuff hose so they do not create a hazard or get bumped during use Use the correct size cuff and proper wrapping techniques Always press front panel switches with finger tip not a finger nail...

Page 17: ...toclave Refer unit to Biomedical Engineering When not in use store the thermometer probe in its protective chamber located in the thermometer unit beneath the blood pressure monitor Additional Precaut...

Page 18: ...n hold the battery check button down for 2 seconds The percentage of lighted segments in the pulse amplitude indicator approximates the battery charge all segments light with fully charged batteries I...

Page 19: ...Figure 2 1 bladder width is small for arm and full cuff pressure is never applied to artery An errone ously high pressure results Below in Figure 2 2 bladder width is adequate for arm and full cuff p...

Page 20: ...uff bladder should be placed over the brachial artery and make sure not to twist kink or otherwise occlude the hose Keep the cuffed part of the arm at the same level as the heart See Figure 2 4 If it...

Page 21: ...taken for a period of 5 minutes After 5 minutes the measurement interval is automatically set to 5 minutes For consecutive measurements press the button again To interrupt the measurement press the b...

Page 22: ...tifact three consecutive audible alert before measurement retry tones will be sounded to announce a measurement retry Visual The visual alarm will be noticed as a flashing LED display of the measureme...

Page 23: ...limits have been set they will not change even when the power is turned off Caution When the measured value reaches or exceeds the high limit or falls below the low limit settings its display will fla...

Page 24: ...t to allow the patient to become prepared for the measurement 4 7 Smart Monitoring Press the switch to select the Smart Monitoring feature If OFF is selected the Smart Monitoring feature will not acti...

Page 25: ...mode follow these instructions 1 Open the Battery Cover on the back of the Press Mate 2 Remove the battery from the compartment with the use of the battery removal ribbon you will not need to disconne...

Page 26: ...e Internal Programs The EXIT TO ROUTINE OPERATION selection allows the monitor to return to routine operation without its Hemodynamic Mode Note If no selection is made within one minute the monitor wi...

Page 27: ...ed programs Note Programs A B and C cannot be changed they can only be viewed While viewing or modifying an Interval Program the LCD is only capable of displaying four lines of data You will need to p...

Page 28: ...d the current interval time on the interval LEDs in turn to signify HD Mode operation End of HD Program Whenever the HD Program is complete the message HD PROGRAM END will be displayed on the LCD scre...

Page 29: ...ed the measurement A profile shaped like a bell curve represents a measurement not affected by motion or other artifact Figure 4 1 shows a trend as well as a digital printout of measurements The marki...

Page 30: ...4 4 Pull the paper case out all the way Figure 4 5 5 Insert a fresh roll of paper in the paper case The Press Mate uses thermal recorder paper Take care to insert properly see instructions on side of...

Page 31: ...g message appears Press the switch and the printout will begin The LCD will now display ALL DATA PRINTED To interrupt the printing at any time press the switch again 5 2 Clock Elapsed Time Meter COLIN...

Page 32: ...nel MEASUREMENT MODE switch to NEONATE 2 Connect the green colored pressure hose and COLIN s disposable neonate blood pressure cuff to the monitor and patient 3 Standard initial inflation pressure in...

Page 33: ...in the ear canal just far enough to seal the opening If necessary gently restrain the patient s head movements while taking his or her temperature In infants or other patients in which the probe tip c...

Page 34: ...purposes Call your COLIN Service Representative for calibration procedures b ORAL The tympanic temperature is adjusted to display an oral temperature equivalent c REC The tympanic temperature is adju...

Page 35: ...s and insert the probe into the patient s rectum To ensure proper tissue contact angle the probe slightly to the side after insertion Insertion depth is recommended at 1 2 3 4 13 20 mm for adults and...

Page 36: ...ill cease to conserve energy If the monitor s operation is continued on battery power the following message will appear Battery Is Empty Connect A C Plug and Power On Again and the unit will shut off...

Page 37: ...nd the S8 bronze pan head screw found on the bottom of the rear case Lift the case and disconnect the battery connector from the chassis Set the rear case aside Refer to Figure 5 2 on the following pa...

Page 38: ...VDC to 14 8 VDC at battery connector Remove the S6 and S8 screws Lift the rear case away from the chassis making sure to disconnect the battery connector When applying rear case make sure the battery...

Page 39: ...rial blood pressure the amplitude of the oscillometric pulses are at a maximum As the pressure of the cuff is relieved the oscillometric pulses slowly decrease in amplitude When the cuff pressure reac...

Page 40: ...25 mmHg The following sequence of events occurs when the pump is turned on by pressing the START STOP switch on the front panel 1 Air is immediately dispensed throughout the entire pneumatic system Fi...

Page 41: ...ssure in the cuff circuit The second Sub CPU U15 controls the printer while collecting information about battery power from the Battery Low Empty Comparator Circuit consisting mainly of OP3 Cuff press...

Page 42: ...the 2 character x 4 line LCD connected via CN2 to the display PCB 6 5 Power Supply PCB The power supply PCB regulates the AC power source supplied through connector CN101 to the secondary side of the...

Page 43: ...but not necessarily error free transmission has occurred If the transmission is valid the light on the Temp Mate flashes After the optical detector in the Temp Mate has converted the optical signal i...

Page 44: ...ct black body one hundred percent of the energy from a radiating object is emitted In the ear canal this is not so 2 There is some heat loss down the ear canal due to thermal gradients By adding linea...

Page 45: ...n this application to wake up the CPU from low power sleep mode 2 When the unit is residing in its base the reed switch SW1 is open and INTO is pulled low If the unit has not been used for at least on...

Page 46: ...the gate of Q1 allowing Q1 to conduct current to the rest of the circuitry 6 16 The 5 Volt Supply The circuit uses a DC to DC converter U9 to produce a 5 volt output from a 5 volt input CPU Reset 1 A...

Page 47: ...tude of input 6 20 Theory of Operation FILAC MCU Introduction The heart of the F 2000 thermometer is a Motorola 8 bit microcontroller unit MCU This HCMOS single chip MCU contains a CPU clock oscillato...

Page 48: ...VR2 to the same value as the output of U1 when a resistance of 4746 ohms is applied to the probe input see Section 7 Calibration This resistance represents 110 0 F the high end of the F 2000 s tempera...

Page 49: ...witches S3 1 at U2 PD4 S3 2 at U3 PD3 S3 3 at U3 PD5 and S2 at U3 PD2 are used to select the pulse timer duration Fahrenheit or Centigrade mode calibration mode and the direct or normal mode respectiv...

Page 50: ...ff by pressing the OFF button on the front panel 5 Depress and hold the START STOP button while simultaneously pressing the ON button Do not release the START STOP switch until the self test procedure...

Page 51: ...connected dummy cuff and calculates the rate of inflation 20 RS232C Test VerifiesTransmitt and Receive lines of the RS232 30 Printer Test Commands the printer to print out a test pattern 45 Initial De...

Page 52: ...operated 1 flashes and elapsed time in seconds is displayed in the PULSE window DIASTOLIC window for model 8800 Press Mates After about 120 seconds the safety timer turns the power OFF and the dump va...

Page 53: ...changes correspond to the LCD description To exit this test press the START STOP switch and the INTERVAL UP switch simultaneously 3 Air Leakage Test a Attach the 220 cc dummy cuff to the cuff connect...

Page 54: ...Press Mates e Once the test is complete the time taken to inflate the 700 cc dummy cuff to 250 mmHg is displayed in the SYSTOLIC window in seconds less the decimal point e g 40 4 0 seconds f The acce...

Page 55: ...isplayed in the SYSTOLIC and DIASTOLIC windows MEAN window for model 8800 Press Mates The acceptable range is as follows COUNT 5 13 MAXPRESS 4 10 60 Deflation Test a Attach the 220 cc dummy cuff to th...

Page 56: ...sure that there is nothing connected to the cuff connector b Press the START STOP switch to start the test c The unit will begin to pump air out of the cuff connector d Use a finger to completely cov...

Page 57: ...Use apparatus shown in Figure 7 3 In this test the user can verify the limit of the mechanical switch Overpressure point Place the unit in the Calibration Mode and complete the following a Place the R...

Page 58: ...bulb Once the Overpressure limit is reached the unit resets itself and reinflates C19 Pressure Error will appear on the LCD display h Acceptable limit 320 330 mmHg NOTE If it takes longer than 15 sec...

Page 59: ...lculated In most cases however the simple offset adjustment in the field is all that is required to bring the system calibration back into American Society for Testing and Materials A S T M specificat...

Page 60: ...a bAd CAL message If the calibration self check fails the F 2000 may be recalibrated using one of two methods The factory calibration procedure is the more accurate of the two and requires the use of...

Page 61: ...the F 2000 on A value near the low calibration value of 89 5 F 31 9 C should be displayed 4 Adjust VR1 until the display reads 89 5 F 31 9 C 5 Depress the pulse timer button A value close to the high...

Page 62: ...ose fittings secure and without leaks Are error codes displayed on the LCD screen on the front of the unit If so call COLIN Technical Services at 800 829 8100 If the displayed cuff pressure is increas...

Page 63: ...s not remain at constant pressure replace a component at a time cuff hose monitor until the leak has been ceased Accuracy The accuracy of the monitor can only be judged by verifying the patient s bloo...

Page 64: ...seconds Verify cuff and hose for extreme air leakage Also verify that the connections of the above to the monitor or cuff are made and tight If the pump did not even start the monitor requires repair...

Page 65: ...was too low to measure Probable Cause Check connection between the unit and air hose and cuff Shorting block on back of unit Check the cuff and hose connector for air leaks Check the cuff for normal...

Page 66: ...you can feel the depression of the dome as each button is pressed Transformer may Verify the voltages at the output of the transformer be defective Power supply defective Verify the output voltages o...

Page 67: ...software was just upgraded the EPROMs may be inserted incorrectly or is defective Unit will not turn off CAUSE SOLUTION Sheet switch failure Verify that as the OFF switch is depressed a bubble or depr...

Page 68: ...Replace clock battery verify that when unit is ON 2 4 Vdc charger voltage is present Clock IC defective Replace U2 clock IC Main board is defective Replace defective main board Unreliable readings Ina...

Page 69: ...utton Replace defective sheet switch Power supply failure Verify output voltages repair or replace power supply Pump failure Verify that when 12 Vdc is applied to pump pump starts Main Board failure V...

Page 70: ...age should be 11 8 1 volts The Battery Empty indicator will appear at 11 2 1 volts Replace main board or rework circuit as required Use Charging Style If the unit is not connected to AC the required t...

Page 71: ...se bracket is located next to the battery housing and connects with a bronze 3 x 4 to the rear case 5 Has the unit been upgraded with the top left and right reinforcement bracket kits they are placed...

Page 72: ...0MSP or TP Basic unit w printer w tympanic Front Case SC 8800SC units Smart unit SYS alarm LEDs no printer Front Case SP 8800SP units Smart unit SYS alarm LEDs w printer Front Case SMS 8800SMS units S...

Page 73: ...8 X2120538A Stopper Rear Case 19 XC2570003B Sponge Handle 20 XC3200118B Pole Holder w Rubber Holder Kit 21 XC2360008B Rubber Holder 22A 2250050C Rear Sheet Label 8800P MSP 22B 2250243A Rear Sheet Labe...

Page 74: ...5 3260003B L Tube 56 XC75310170 Air Tube A 57 XC75301170 Air Tube B 58 XC75310040 Air Tube C 59 7540005A Clamp 60 X3260013A L Tube D XC2120861A Rt Reinforcement Bracket XC2120862A Lt Reinforcement Bra...

Page 75: ...Neonatal Colin Datascope N A D 10 C0430033A Colin Datascope N A D without fittings 10 C0430034A Reusable Cuff Covers Infant 1 C0430041A Child small adult 1 C0430042A Adult 1 C0430043A Large Adult 1 C0...

Page 76: ...424A Door Hinge Left 9 3200425A Genius Latch 10 3200426A Latch Guide 11 3200427A Latch Spring 12 7700017A Magnet 13 1600148A Rear Label 14 2150347A Serial Number Plate 15 7730003A Rubber Foot 16 64410...

Page 77: ...4 7774 304815 3 No 3 28 x 5 16 Self Tap Screw 25 7774 304823 2 No 4 24 x 7 32 Self Tap Screw 26 7774 401793 Neck Strap 28 7774 807163 Instruction Serial Number Label 29 7774 307099 Switch Actuator 30...

Page 78: ...10 0 Schematics 10 1 Block Diagram 8800 10 1 back to contents page...

Page 79: ...sor Manifold Bleed Valve Dump Valve Solenoid Orifice Pump Reservoir Bleed Valve Dump Valve Manifold Cuff Main PCB Transducer Pump Over Pressure Switch Diagram of 8800 without Smart Features Diagram of...

Page 80: ...3 LCD XTAL1 XTAL2 CPU A D V REF 5V TPILE AMP THERM 1 THERM 2 MUX DIP SWITCHES WAKE UP INTO POWER SWITCH 5V 5V REG 5V IR LED 5V REG BATTERY EEPROM SPEAKER 10 2 Block Diagram Genius back to contents pa...

Page 81: ...8 to 7 3 seconds 693 cm3 air chamber 0 to 250 mmHg 4 Deflation speed at pressures indicated Pressure Speed mmHg sec 240 4 6 to 6 2 160 4 6 to 6 2 80 3 3 to 5 0 40 2 6 to 4 4 5 Withstand voltage 1000...

Page 82: ...metric Display Method LED display for actual measurement data LCD stored data error messages and alarm settings Pressure Detection Semiconductor pressure sensor Inflation Method Diaphragm pump driven...

Page 83: ...Control by RTS CTS Signal Data can be received by Press Mate when RTS signal level is HIGH Data can be transmitted by Press Mate when CTS signal level is HIGH h RS 232C ouputs data when Temp Mate is c...

Page 84: ...MSP only Output Terminal DSUB 15 on rear panel Corometrics Version Dip switch No 4 OFF 1 Communication Specification a 600 bps b 8 data bits c None parity d 1 stop bit e Ready Busy control by CTS sign...

Page 85: ...ry Battery Life Approximately 5000 temperatures Low Battery Warning 2 levels on LCD screen Level 1 Replace battery as soon as practical Level 2 Replace now thermometer will not operate Optional Temper...

Page 86: ...to 32 C Accuracy Meets or exceeds A S T M standard E1112 NOTE When using a liquid bath to test the accuracy of the predictive mode correct the final temperature as follows to compensate for the differ...

Page 87: ...to be inaccurate 1 Remove the battery access door by pressing the battery compartment access door latch 2 Install four alkaline C cell batteries Be sure to observe the polarity indicator sticker 3 Rep...

Page 88: ...s and yy representing minutes Note that xx hours is flashing 3 Press the ADV advance button repeatedly until the correct hour is displayed 4 Press the D D button once Note that yy minutes is now flash...

Page 89: ...the main PCB If software updates are made available from the factory or if a problem with this chip is suspected contact Nellcor s Technical Services Department of Nellcor s local representative for...

Page 90: ...this setting maximizes both readability and print head life 1 Switch on the N 20P in spot check mode Spot check mode is started by depressing the instrument measure button once 2 Simultaneously press...

Page 91: ...ional saturation that is oxygenated hemoglobin expressed as a percentage of the hemoglobin that is capable of transporting oxygen It does not detect significant levels of dyshemoglobins In contrast so...

Page 92: ...eir current levels are within the A D converter s acceptable range and AC ranging where DC offset is eliminated from each LED signal Digital Circuitry Block Diagram Figure 12 4 The diagram shows the N...

Page 93: ...wavelengths which are used for calculation of pulse rate and oxygen saturation in blood are transmitted at the following wave lengths infrared IR light at 915 nanometers red light at 660 nanometers P...

Page 94: ...re within an acceptable dynamic range Signal channel gain may also need to be increased The CPU uses PWM lines to control LED current level or to amplify the signal channel Input conditioning Sensor o...

Page 95: ...d signals are within the dynamic range of the input amplifier Because excessive current to the LEDs will induce changes in their spectral output it is sometimes necessary to increase the received sign...

Page 96: ...D will still be limited to a safe level The RSENS line senses the RCal value and enables the CPU to make the proper calculations based on the type of sensor being used Input Conditioning Input to the...

Page 97: ...ll begin After about 10 seconds of continuous photocurrent signal zeros will be displayed Signal Gain The separated IR and red signals are amplified so that their DC values are within the range of the...

Page 98: ...signals create a charge which is stored on C29 and C89 respectively These capacitors hold this charge even after the switches are opened and the resulting voltage is subtracted from the combined sign...

Page 99: ...rol CPU Main PCB Memory Software Ambient Light Sensor Real time Clock Ambient Temp Sensor ON ADV D D Printer Audio Beeper Display Drivers Display N 20 N 20P Control Buttons AUX PCB Main PCB To Analog...

Page 100: ...or the oximeter sensor red and infrared channels and the sensor calibration resistor RSENS Light temperature and battery voltage are also measured The N 20P CPU is configured as follows Decoded AD0 an...

Page 101: ...even address in the DC00 DFF range could be used for external port access In other words reading or writing address DC00 DC02 DC04 etc will all produce the same results Due to the CPU configuration t...

Page 102: ...bytes of external output port i e U18 and U17 must be written to at the same time The upper byte of the output port U17 cannot be written to independently see also Address Decoding Real Time Clock RTC...

Page 103: ...The display control circuitry is divided into the following subsections Control Conditioning Circuit main PCB The control conditioning circuit processes signals generated by the CPU to produce timing...

Page 104: ...uit performs two basic functions 1 it allows the CPU to enable and disable the display high voltage VDISP and 2 it slows the edge slew rate of the segment drivers as it switches the high voltage When...

Page 105: ...upply circuits consist of the following power supplies Regulated power supply Power supplied by the batteries is regulated at 5 VDC This supply is used by all of the digital circuitry and some of the...

Page 106: ...e inside the CPUs integrated circuit These resistors limit that current path to safe levels Power Shut off Circuit Fuse F1 protects the unit from excessive current draw CR24 protects against large vol...

Page 107: ...level serial interface RXD and TXD are configured as a standard asynchronous serial transmitter and receiver at 19 2 Kbaud with 1 stop bit 8 data bits and no parity The serial interface can operate i...

Page 108: ...battery life remains the nominal voltage and discharge curves must be known the BAT TYPE signal provides that information Printer Control Printer circuitry is divided into two subsections the printer...

Page 109: ...to the printer supply voltage VPRN the other lead is connected to the driver chip see Optional Printer Flex Circuit with User Controls One of the print dot resistor leads DOT4 is also fed back to the...

Page 110: ...s are both enabled and disabled at the same time The large bulk capacitor C3 is required due to the large current spikes that are required by the printer and the large internal series resistance of di...

Page 111: ...trument automatically switches off If at any time during the test sequence Err followed by a code number is displayed make note of the error code and refer to error code descriptions in this manual Lo...

Page 112: ...r model DRC 1 to test instrument performance The SRC 1 plugs into the DB 9 sensor connector and uses the instrument s power supply and diagnostic software to test the display the accuracy of the oxime...

Page 113: ...the printer ON button On appears in the Oxygen Saturation display A printer test pattern prints out the following is an approximate example of the test pattern N 20P PRINT TEST 00 00 00 00 00 ABCDEFGH...

Page 114: ...ent Tools Screwdriver Phillips Pliers long nose Screwdriver small flathead Soldering iron low power N 20P Disassembly Procedure Whenever repair or disassembly is required always wear a ground strap co...

Page 115: ...thead screw driver between the covers at the base of the instrument and slowly prying them apart NOTE The covers are hinged at the top end in a different way do not attempt to separate the covers usin...

Page 116: ...auxiliary PCB 26 and remove the three flex display circuits 4 Separate the auxiliary PCB from the main PCB 27 by pulling the PCB headers apart at the base 5 Remove the display assembly 18 from the mai...

Page 117: ...the connectors on the printer flex circuit 28 by slowly pulling outward from side to side at alternating ends of the connectors 3 Remove the printer button strip 7 from the printer flex circuit 4 Remo...

Page 118: ...se to measure button CAUSE 1 Battery access door may not be properly latched ACTION 1 Check access door and ensure it is properly latched CAUSE 2 Batteries may be discharged ACTION 2 Exchange them for...

Page 119: ...erfusion may be too low ACTION 1 Check patient status Test the instrument on someone else or try another type of sensor The N 20P will not make a measurement if perfusion is inadequate CAUSE 2 Patient...

Page 120: ...properly loaded characters can be printed on only one side of the thermal paper roll ACTION 1 Ensure that the thermal paper is properly loaded if needed remove the roll of printer paper and reload the...

Page 121: ...low profile auxiliary PCB 491244 12 JP5 Connector ZIF flex 7 pin auxiliary PCB 491242 13 JP9 Connector ZIF flex 22 pin auxiliary PCB 491250 14 JP2 3 Connector ZIF flex 32 pin auxiliary PCB 491243 15...

Page 122: ...P N 33 Screw plastite 871031 34 Sensor lock 022943 35 Sensor shroud 022944 36 Spacer 023452 37 Stiffener printer button 023131 38 Tap foam 88 x 38 023300 39 BZ1 Transducer audio piezo ceramic 691230...

Page 123: ...y depressing the instrument measure button once Spot check mode computes SpO2 averaged over five valid pulses and displays SpO2 and pulse rate at the end of the measurement interval If the printer is...

Page 124: ...2 Pulse Rate 20 250 bpm 3 digits2 Response In spot check mode the measurement cycle from button press to display of data is five valid pulses depending on patient pulse rate and perfusion In extended...

Page 125: ...sducer DF A 40 kg NOTE DURAFORM oxygen transducers are not available for sale in Europe Electrical Specifications BATTERY Type Four 1 5 V alkaline C batteries Battery Capacity N 20P 32 hours typical N...

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