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Spacelabs 91518, Service Manual

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91518 Multigas Analyzer Service Manual

2-13

Setup

Returning the Sample Gas to the Patient Circuit

The sample gas can also be returned to the patient breathing circuit. You may need an adapter to connect to 
the patient breathing tubes.

Figure 2-13: Returning the sample gas to the patient circuit

Anesthesia
machine

Multigas Analyzer

Summary of Contents for 91518

Page 1: ...Multigas Analyzer 91518 Service Manual 070 1328 00 Rev E...

Page 2: ...nt which are classified by Spacelabs Medical as field repairable Spacelabs Medical is committed to providing comprehensive customer support beginning with your initial inquiry through purchase trainin...

Page 3: ...p 2 2 Power Up Verification 2 14 Theory Overview 3 1 Interface PCBA 3 3 Gas Analyzer Unit 3 4 Maintenance Overview 4 1 Preventive Maintenance 4 2 Corrective Maintenance 4 16 Disassembly and FRU Replac...

Page 4: ......

Page 5: ...urane The 91518 Multigas Analyzer interfaces to a Spacelabs Healthcare monitor through an SDLC connection The Spacelabs Healthcare monitor provides the numeric display for gas concentrations a respira...

Page 6: ...raview 1600 90364 Ultraview 1050 90369 Ultraview 1030 90367 Some UCW S N below 385 3xxxxx and Ultraview monitors S N below 387 1xxxxx do not support all waveforms and display options such as colors Di...

Page 7: ...d storing the 91518 Multigas Analyzer Table 1 Environmental Requirements Operating Storage Temperature 18 to 28 C 64 4 to 82 4 F 5 C of calibration 25 to 70 C 13 to 158 F Humidity 20 to 80 non condens...

Page 8: ...f the analyzer All other multigas analyzer functions are controlled using the touch keys on Spacelabs Healthcare monitors Front View Figure 1 2 Front view of the 91518 Multigas Analyzer Gas sampling l...

Page 9: ...zer Service Manual 1 5 Introduction Rear View Figure 1 3 Rear of 91518 Multigas Analyzer 9 pin SDLC connector J2 RS 232 connector J1 SDLC terminator Equipotential ground terminal 26 pin SDLC connector...

Page 10: ......

Page 11: ...osal or recycling of packaging waste Equipment Inventory The following items are included with the 91518 Multigas Analyzer Gas sampling input line Safety Checks Physical Inspection Visually inspect th...

Page 12: ...91369 91370 Monitor Installations To install the 91518 with 90367 69 91369 91370 monitors 1 Verify that AC power is connected as required by local standards An external power supply P N 119 0480 00 or...

Page 13: ...ension cable jack J2 P N 012 0175 01 SDLC terminator P N 012 0507 02 SDLC SDLC tee cable 91518 90367 69 91369 91370 monitor jack AC power source Power supply P N 119 0480 00 jack J2 P N 012 0175 01 SD...

Page 14: ...mation Note An extension cable 6 foot SDLC extension cable P N 012 0619 00 or 3 foot SDLC extension cable P N 012 0242 00 can be connected to the tee cable to extend the distance of the 91518 from the...

Page 15: ...using Flexport and extension cable jack J2 P N 012 0175 01 SDLC terminator P N 012 0507 02 SDLC SDLC tee cable 91518 90367 69 91369 91370 monitor jack AC power source Power supply P N 119 0480 00 P N...

Page 16: ...or to unterminated 6 Set the SDLC switch on the 91518 Multigas Analyzer to terminated Figure 2 6 91518 connections to 91387 monitor using power from monitor 91387 Monitor Installation with Flexport To...

Page 17: ...f the multigas analyzer Note If using more than one Flexport Spacelabs Healthcare recommends the use of the Flexport Holder P N 650 0201 00 Figure 2 7 91518 connections to 91387 monitor with Flexport...

Page 18: ...analyzer are powered OFF 3 Assemble the required cables for your system configuration refer to Figure 2 8 for part numbers 4 Connect the SDLC cable P N 012 0601 xx to the SDLC jack J3 on the 91518 re...

Page 19: ...e P N 012 0601 xx to the SDLC jack J3 on the 91518 rear panel refer to Figure 1 3 on page 1 5 for rear panel information and to the SDLC J2 of the monitor or module housing 5 Set the SDLC switch on th...

Page 20: ...or part numbers 4 Connect the P1 connector of the tee cable P N 012 0175 01 to the SDLC jack J2 on the 91518 rear panel refer to Figure 1 3 on page 1 5 for rear panel information 5 Connect P2 of the t...

Page 21: ...er to Figure 1 3 on page 1 5 for rear panel information 5 Connect P3 of the Flexport cable P N 012 0152 00 to P2 of the tee cable P N 012 0175 01 6 Connect P1 of the Flexport cable to the remote modul...

Page 22: ...line to the gas outlet port on the module s front panel Insert the other end of the line into the hospital scavenging system Ensure that the ventilation tube diameter is at least two to three times l...

Page 23: ...ample Gas to the Patient Circuit The sample gas can also be returned to the patient breathing circuit You may need an adapter to connect to the patient breathing tubes Figure 2 13 Returning the sample...

Page 24: ...holder ensure that the water trap is not cracked 2 Verify that the monitor and analyzer are connected according to Multigas Setup on page 2 2 3 Power OFF the multigas analyzer if the power is ON 4 Pow...

Page 25: ...ars Note The CO2 waveform and the EtCO2 and O2 numerics will take approximately 5 seconds before appearing on the screen 11 Remove the water trap Verify that the LEAK DETECTED Check System message app...

Page 26: ......

Page 27: ...resent it will be misidentified and or will interfere with the reported anesthetic agent concentrations Caution When administering anesthetic agents incorrect agent identification may occur when a mix...

Page 28: ...DC DC Conv Power Path Control 9 18V to 5V DC DC conv 18V 18V SDLC_26 pin 5VDC 15VDC 5VDC RS485 Ethernet Controller RS232 Xcvr LED indicators Test Switches USB Xcvr SDLC Xcvr Reset MCU RAM Flash eeprom...

Page 29: ...des the board version by selectively connecting each of the six lines either Hi or Lo to form an ID code This is read and used by the software and passed to the host monitor upon demand Reset Circuit...

Page 30: ...1 00 is a discrete device that measures the concentrations of gases Anesthetic agents or mixtures of two anesthetic agents are automatically identified and concentrations of the identified agents are...

Page 31: ...on with dry gases Another nafion tube is used between the absorber and the pneumatic unit to prevent humidity caused by absorption of CO2 Gas Analyzers After flowing through the zero valve and nafion...

Page 32: ...is run by a brushless DC motor The sample flow is measured with a differential pressure transducer across a known restriction The motor is automatically controlled to maintain a constant flow even whe...

Page 33: ...ption of the gas sample CO2 N2O halothane enflurane isoflurane desflurane and sevoflurane at seven infrared wavelengths which are selected using optical narrow band filters The infrared radiation dete...

Page 34: ...ns The compensation parameters are determined individually for each gas measuring unit during the factory calibration Figure 3 7 Infrared absorbance of anesthetic agents The infrared radiation source...

Page 35: ...scillating magnetic field The oxygen measurement is based on paramagnetic susceptibility The gas and the reference gas which usually is room air are conducted into a gap with an electromagnet A strong...

Page 36: ...Theory 91518 Multigas Analyzer Service Manual 3 10 Figure 3 9 Signal processing Figure 3 10 Control logic...

Page 37: ...EEPROM OM board The oxygen measuring board contains the specific electronics for the oxygen sensor The sample flow measurement system and sampling system pressure sensors are on this board It also co...

Page 38: ......

Page 39: ...formed after the preventive maintenance procedure Perform a functional check after replacing any item during the corrective maintenance procedure Caution Observe precautions for handling electrostatic...

Page 40: ...econds the bedside monitor displays the GAS parameter key to the right of a flat waveform If this does not occur verify that the power ON OFF button is pressed and illuminated The multigas analyzer mu...

Page 41: ...periods the GAS SENSOR STABILIZING message displays on the prompt line for approximately 30 minutes After the gas sensor has warmed up the SENSOR WARMING UP message disappears and the message AUTO ZE...

Page 42: ...y washing it with water and mild soap 3 After the cleaned filter has dried reinstall it 4 Reinstall the fan filter cover 5 Verify that fan is working properly and is drawing air into the unit Figure 4...

Page 43: ...to its recessed area on the front panel until it is latched D fend Connection O Ring Replacement An O ring on each side of the connection post mates with the D fend water trap The O rings can be remov...

Page 44: ...ck 1 Peel off the label refer to Figure 4 5 that covers the screw and then remove the screw Figure 4 5 Reference gas block label Note A small O ring is located between the filter unit and the front pa...

Page 45: ...llowing proper anti static procedures including the use of an ESD wrist band and mat An electrostatic discharge from your fingers can permanently damage electronic components All static sensitive elec...

Page 46: ...both holes in the back of the unit handle 4 Disconnect the gas unit connector cable by unfastening the cable s captive screws Figure 4 8 Unplug the connector and route the cable to the left away from...

Page 47: ...ving the handle from the gas bench 8 Grasp the front of the gas unit and with the other hand pull the metal case straight back and off Set aside the case handle and screws Figure 4 10 Separating the g...

Page 48: ...h positions are not changed Figure 4 11 Dip switches normal operating position Pneumatic Block Filter Replacement To replace the pneumatic block filter 1 Disassemble the gas unit according to Gas Unit...

Page 49: ...o dislodge it There is an O ring on the bottom side of the filter element that may also fall out 4 Turn the gas unit over again 5 Examine the O ring Unless it is severely damaged place it back in the...

Page 50: ...the Nafion tubing There are two pieces of the nafion tubing of the same length arranged with one oval loop laying inside another oval loop Figure 4 13 Nafion tubing routing 2 With your fingers or wit...

Page 51: ...n tubing replacement is being performed as part of the corrective maintenance procedure and the absorber is at least six months from replacement install the new pieces of Nafion tubing Absorber Replac...

Page 52: ...ecommended cleaning solutions or you may void the manufacturer s warranty Harsh chemical agents degrade plastics and will compromise the safety of the device Disconnect the equipment from the patient...

Page 53: ...ient accessories are available for the 91518 Multigas Analyzer Disposable accessories are for single patient use only and must not be sterilized or cleaned for reuse on other patients Refer to the ins...

Page 54: ...N2O CO2 and either O2 or N2 against which the 91518 is standardized The calibration gas is supplied in a canister with a limited amount of gas When the calibration sequence begins a detailed analysis...

Page 55: ...reventing accurate calibration Equipment and Supplies Needed for Calibration Calibration Adapter Kit P N 025 0047 00 Calibration Gas Mixture 5 Desflurane 5 5 CO2 43 N2O 46 5 O2 P N 025 0047 00 37 94 c...

Page 56: ...cylinder using the setup shown in Figure 4 16 6 Touch the hidden SERVICE CAL key one inch to the right of the ZERO key five times 7 Establish a gas flow which includes a gas overflow of 20 to 50 ml m...

Page 57: ...Verify that the gas values displayed are within the ranges provided in Table 1 If they are not correct verify that the excess gas flow rate is still within 20 to 50 ml min If the flow rate has dimini...

Page 58: ...the NORMAL SCREEN key removes the message from the waveform zone and stops the alarm tone However the message will continue to display on the monitor s prompt line Whenever a span failure occurs the...

Page 59: ...display the diagnostic calibration data values The patient has been disconnected from the 91518 in order to supply calibration gases The breath detection is disabled and the displayed values are not b...

Page 60: ...ed for the multigas analyzer Monitor Type Refers to the type of Spacelabs Healthcare monitor being used with the analyzer IF FE Interface PCBA and front end PCBA version numbers General Error Status P...

Page 61: ...nnector to the 91518 at the port on the water trap 3 Use your fingers to cover the Ref and exhaust ports to prevent leaking 4 Pump the system pressure to 180 mmHg with the bulb assembly and then close...

Page 62: ...e enclosure 7 Unplug the looped short cable behind the rear panel from the PCBA 8 Remove all six screwlocks holding the rear panel to the PCBA interface Save the rear panel and screwlocks 9 Attach the...

Page 63: ...t Use the following steps to replace the power switch assembly 1 Remove all cables from the rear panel 2 Unfasten the captive fastener in the middle of the gas unit rear panel and remove the screws se...

Page 64: ...le from the wire clip in the chassis Remove the entire bezel assembly tethered cable included from the chassis Set the chassis aside and save the screws Figure 4 22 PCBA removal 10 Remove the four scr...

Page 65: ...7 Lightly fasten the top surface of the side covers to the chassis using the four painted screws and their washers Repeat the step at the bottom of enclosure through the two middle holes in the side c...

Page 66: ......

Page 67: ...tter digital multimeter DMM Tek DM501A or similar SDLC extender cable P N 175 0360 00 Problem Solving Before PCBA level troubleshooting is initiated first establish that there is a fault with the anal...

Page 68: ...ove conditions are not met Flash memory programming error or defective software on the interface board Contact a Spacelabs Healthcare Field Service Engineer OCCLUSION Check system or OCCLUSION Check s...

Page 69: ...nternal communication error was detected Troubleshoot multigas analyzer start by replacing OEM multigas bench Return the multigas analyzer to Spacelabs Healthcare for repair SERVICE CAL MODE Patient i...

Page 70: ...d OEM bench If tests OK return the faulty OEM bench to Spacelabs Healthcare for repair If the good OEM bench does not correct the problem troubleshoot the multigas analyzer or return the Analyzer to S...

Page 71: ...and kPa values and the CO2 waveform display is removed The multigas analyzer has measured a barometric pressure of 300 mmHg or lower or 975 mmHg or higher and partial pressure units are selected Compa...

Page 72: ...ected The analyzer is not designed to simultaneously measure more than two anesthetic agents Inaccurate numeric concentration values may be displayed when two or more agents are mixed The displayed va...

Page 73: ...g Filter Assy Ref Gas 2 8 1 65340 Silicone Tube Transparent 1 6M 717 0055 00 Nafion Tubing 300 mm 717 0051 00 Filter Pneumatic Block 0 5 mm 886136 Fan Filter 886236 HEL Zero Absorber 895933 Filter Ass...

Page 74: ...escription Part Number Corrective maintenance kit 91518 050 0477 00 OEM gas module 010 1651 00 X Power Supply 90W 18V Medical Grade 119 0480 00 PCBA Multigas interface 670 1319 01 X Pump Air 5 15 VDC...

Page 75: ...Male Luer 214 0261 00 Bag Polyethylene 9 0 12 0 1 5 2 0 MI 004 0180 04 Label Box 025 0047 00 334 2093 00 Label Adhesive Gas Cylinder 0250047 334 1943 00 Sample Line agent w sampling Tee 10 50 BX 015...

Page 76: ...0205 00 CLIP WIRE 2X 39X 5 PNL MTG 344 0240 00 CABLE ASSY DC INPUT CONN 175 0788 01 CABLE ASSY LED SWITCH 91518 175 1609 00 HANDLE ALUM 1 1G 1 HT 4 40 THD 367 0020 00 STUD GROUND EQUAL POTENTIAL 355...

Page 77: ...91518 Multigas Analyzer Service Manual 6 5 Parts Drawings Description Drawing Sheets 91518 Assembly 1 2 91518 Schematics P N 676 0719 00 2 11...

Page 78: ......

Page 79: ...d ensure that it is used in such an environment Emission Test Compliance Electromagnetic Environment RF emissions CISPR 11 Group 1 Class B This equipment uses RF energy only for internal function Ther...

Page 80: ...quality should be that of a typical commercial or hospital environment Refer to the host monitor module housing service manual Surge IEC 61000 4 5 1 kV differential mode 2 kV common mode 1 kV differe...

Page 81: ...ower rating of the transmitter in watts W according to the transmitter manufacturer and d is the recommended separation distance in meters m Field strengths from fixed RF transmitters as determined by...

Page 82: ...of the interference Separate the sensitive receivers from the causes of the interference refer to the following table Rated Maximum Output Power of Transmitter watts Separation Distance According to F...

Page 83: ...CIAL FUNCTIONS Key Mouse Connection RECORD Key START STOP Key NORMAL SCREEN Key START STOP MONITOR SETUP Key STOP or CANCEL Key ALARMS Key CONTINUE Key PREVIOUS MENU Key ENTER Key ON Power Connection...

Page 84: ...Indicator Remote Control Indicator Local Control PRINT REPORT Key Indicator Out of Paper Partial ON OFF Recorder Paper Normal Screen Return to Prior Menu Clock Time Setting Key TREND TIMER Key HELP Ex...

Page 85: ...Serial Port 1 Serial Port 2 External Marker Push Button Connection SDLC Port Arterial Pulse Electrocardiograph or Defibrillator Synchronization Gas Exhaust Foot Switch Enlarge Zoom Delete PCMCIA Card...

Page 86: ...ctor Microphone Omnidirectional Microphone Audio Output Speaker Universal Serial Bus Network Connection Oxygen reference gas port Gas Sampling Port Gas Return Port Low Priority Alarm Nurse Call High P...

Page 87: ...national This symbol indicates that the waste of electrical and electronic equipment must not be disposed as unsorted municipal waste and must be collected separately Please contact an authorized repr...

Page 88: ...electric shock and is defibrillator proof IEC 60601 1 Type CF equipment The unit displaying this symbol is an F type isolated floating patient applied part providing a high degree of protection again...

Page 89: ...Size Long 12 to 19 cm NIBP Cuff Small Adult Size Long 17 to 25 cm NIBP Cuff Small Adult Size 17 to 25 cm NIBP Cuff Adult Size Long 23 to 33 cm NIBP Cuff Large Adult Size Long 31 to 40 cm NIBP Cuff Lar...

Page 90: ...inyl Material Place Artery Symbol and Arrow over Brachial or Femoral Artery Quantity Happy Face Sad Face Magnifying Glass Compression File Cabinet List of Rooms Arrows Printer Recycle Service Message...

Page 91: ...elabs Compatible 1 32 Access Codes 1 Through 32 AIR Air ANT 1 ANT 2 Diversity Antenna System 1 Diversity Antenna System 2 Arr1 ArrNet2 Arrhythmia Net 1 Arrhythmia Net 2 avDO2 Arterial Venous Oxygen Di...

Page 92: ...xygen Availability PaO2 Partial Pressure of Arterial Oxygen PRESS press PRS Pressure PvO2 Partial Pressure of Mixed Venous Oxygen RESP resp Respiration SDLC Synchronous Data Link Control SPO2 SpO2 SpO...

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