Spacelabs 91518 Service Manual
Multigas Analyzer
91518
Service Manual
070-1328-00 Rev. E
©2008 Spacelabs Medical, Inc.
Rx Only
!
All rights reserved. Contents of this publication may not be reproduced in any form without the written permission of
Spacelabs Medical. Products of Spacelabs Medical are covered by U.S. and foreign patents and/or pending patents.
Printed in U.S.A. Specifications and price change privileges are reserved.
Spacelabs Medical considers itself responsible for the effects on safety, reliability and performance of the equipment
only if:
• assembly operations, re-adjustments, modifications or repairs are carried out by persons authorized by
Spacelabs Medical, and
• the electrical installation of the relevant room complies with the requirements of the standard in force, and
• the equipment is used in accordance with the operations manual.
Spacelabs Medical will make available, on request, such circuit diagrams, component part lists, descriptions,
calibration instructions or other information which will assist appropriately qualified technical personnel to repair those
parts of the equipment 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, training, and service for the life of your Spacelabs Medical equipment.
CORPORATE OFFICES
U.S.A.
Spacelabs Medical, Inc.
5150 220th Ave SE
Issaquah, WA 98029
Telephone: 425-657-7200
Telephone: 800-522-7025
Fax: 425-657-7212
Authorized EC Representative UNITED KINGDOM
Spacelabs Healthcare, Ltd.
Beech House, Chiltern Court
Asheridge Road, Chesham
Buckinghamshire HP5 2PX
Telephone: 44 (0) 1494 784422
Fax: 44 (0) 1494 794414
BirthNet, Clinical Browser, Data Shuttle, Flexport, Intesys, Mermaid, MOM, Multiview, PCIS, PCMS, PrintMaster,
Quicknet, Sensorwatch, TRU-CAP, TRU-CUFF, TruLink, Ultralite, Ultraview, Ultraview Care Network, Ultraview Clinical
Messenger, Ultraview Digital Telemetry, Ultraview SL, Uni-Pouch, UCW, Varitrend and WinDNA are trademarks of
Spacelabs Medical, Inc.
Other brands and product names are trademarks of their respective owners.
Caution:
US Federal law restricts the devices documented herein to sale by, or on the order of, a
physician.
Before use, carefully read the instructions, including all warnings and cautions.
Table of Contents
Contents Page
Introduction
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Setup
Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Safety Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Multigas Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Troubleshooting
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Problem Solving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Parts
Field Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Appendix A — Electromagnetic Compatibility
Electromagnetic Emissions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Frequency Separation Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Appendix B — Symbols
90518 Multigas Analyzer Service Manual i
Introduction
Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Overview
The 91518 is a multigas analyzer used primarily in an operating room environment to measure the CO2
produced by a patient and the O
are monitored are halothane, isoflurane, enflurane, sevoflurane, and desflurane.
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 respiratory rate, and a
capnograph waveform for CO
, N2O, and anesthetic agents being administered. The anesthetic agents that
2
.
2
Multigas Analyzer
Figure 1-1: 91518 Multigas Analyzer
Spacelabs Healthcare products are designed and manufactured under good manufacturing practices and in
compliance with all applicable regulatory requirements. To ensure proper operation in accordance with these
guidelines, this product must be maintained by trained technicians using Spacelabs Healthcare authorized
replacement parts.
91518 Multigas Analyzer Service Manual 1-1
Introduction
Compatibility
The 91518 Multigas Analyzer is designed for use with Ultraview SL, Ultraview, and UCW® monitors.
Ultraview SL
• Ultraview SL2400 (91369), SL2600 (91370), SL2700 (91387-27), SL2800 (91387-28)
Ultraview
• UCW (90385)*, Ultraview 1700 (90387)*, Ultraview 1500 (90363), Ultraview 1600 (90364), Ultraview 1050
(90369), Ultraview
* 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.
™
®
1030 (90367)
Dimensions
Height 17.15 cm (6.75 inches) (enclosure: 14.605 cm [5.75 inches]); feet: 1.27 cm
(0.5 inches)
Width 15.24 cm (6 inches)
Depth 28.45 cm (11.2 inches) (enclosure: 21.59 cm [8.5 inches]); gas module protrudes
from front 4.572 cm (1.8 inches); handle in back of enclosure protrudes 2.286 cm
(0.9 inches)
Weight 3.714 kg (8.19 lbs)
91518 Multigas Analyzer Service Manual 1-2
Introduction
Environmental Requirements
Table 1 lists the environmental requirements, including temperature, for operating and storing the 91518
Multigas Analyzer.
Table 1: Environmental Requirements
Operating Storage
Temperature
Humidity
Altitude N/A 12,192 m (40,000 feet)
Atmospheric Pressure
18° to 28° C (64.4° to 82.4° F),
±5° C of calibration
20 to 80% (non-condensing)
relative humidity (RH), ±20%
RH of calibration
500 to 800 mmHg, ±50mmHg
of calibration
-25° to 70° C (-13° to 158° F)
10 to 95% (non-condensing)
N/A
91518 Multigas Analyzer Service Manual 1-3
Introduction
Controls and Connectors
The blue power ON/OFF switch is located on the front of 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 line inlet connector
Replaceable D-fend water trap
Reference gas port (no connection)
Power ON/OFF switch
Gas outlet port
Fan and filter
91518 Multigas Analyzer Service Manual 1-4
Rear View
Introduction
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 (J3)
Power connection
91518 Multigas Analyzer Service Manual 1-5
Setup
Contents
Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Multigas Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Power Up Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Unpacking
Before unpacking the 91518 Multigas Analyzer, inspect its shipping container for visible damage. Unpack and
remove the multigas analyzer from its container. Check the multigas analyzer's exterior for signs of physical
damage. Be sure to check the SDLC connectors (refer to Figure 1-3 on page 1-5) on the back of the multigas
analyzer for bent pins. If any damage is apparent, notify the carrier and Spacelabs Healthcare immediately.
Please follow your hospital’s procedure regarding the disposal 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 the unit to verify that it is physically sound (no loose hardware, no damaged fittings, clean fan
filter, etc.).
Table 1: Summary of Standards for Medical Monitoring Equipment
International Mains to
Chassis Leakage
100 μA - normal condition, ground
attached (AC connector to chassis)
500 μA - single fault condition, open
ground or reverse polarity
300 μA - normal condition, ground
attached (AC connector to chassis)
300 μA - single fault condition, open
ground or reverse polarity
U.S. (120 V) Mains to
Chassis Leakage
Mains Resistance
500 milliohms*
200 milliohms*
* Measured from the AC Power cord third wire ground to the most distant ground attachment
91518 Multigas Analyzer Service Manual 2-1
Setup
Non-terminated Terminated
Multigas Setup
Sampling Lines
The sampling lines used with a 91518 Multigas Analyzer must be constructed of a material that will not absorb
anesthetic agents and cause erroneous readings. The correct sample lines are available from Spacelabs
Healthcare. Refer to Parts on page 6-1.
Power Supply
The 91518 can be powered from the J3 SDLC connector from the patient monitor or module housing, or it can
be powered from an external power supply, P/N 119-0479-xx.
SDLC Bus Termination
The SDLC bus must be properly terminated for correct operation. Termination of the SDLC bus is
accomplished by means of terminator switches on the rear of the monitor and the multigas analyzer, or by a
terminator plug P/N 012-0507-02, when connected to a portable monitor.
Figure 2-1: Terminator switch settings
90367/69, 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 119-0251-00) is required for use with the 91518 Multigas Analyzer.
2 Ensure that the monitor and multigas analyzer are powered OFF.
3 Assemble the required cables and terminators for your system configuration (refer to Figure 2-2 for 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
Note:
An extension cable (6-foot SDLC extension cable [P/N 012-0619-00] or 3-foot SDLC extension cable
[P/N
(refer to
5 Connect the SDLC terminator to the P2 connector of the tee cable.
6 Connect the SDLC cable to the monitor.
7 Set the SDLC switch on the 91518 Multigas Analyzer to terminated ( ).
Figure 1-3 on page 1-5 for rear panel information).
012-0242-00]) can be connected to the tee cable to extend the distance of the 91518 from the monitor
Figure 2-3 on page 2-3).
91518 Multigas Analyzer Service Manual 2-2
Setup
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
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
extension cable
P/N 012-0619-00
or 012-0242-00
Figure 2-2: 91518 connections to 90367/69, 91369, 91370 monitors
91518 Multigas Analyzer Service Manual 2-3
Figure 2-3: 91518 connections to 90367/69, 91369, 91370 monitors, using extension cable
Setup
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 012-0152-00
tee cable
To peripheral device
Flexport interface
90367/69, 91369, 91370 Monitor Installations with Flexport
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 119-0251-00) is required for use with the 91518 Multigas Analyzer.
2 Ensure that the monitor and multigas analyzer are powered OFF.
3 Assemble the required cables and terminators or your system configuration (refer to Figure 2-4 for 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
Note:
An extension cable (6-foot SDLC extension cable [P/N 012-0619-00] or 3-foot SDLC extension cable
[P/N
(refer to
5 Connect P3 of the Flexport tee 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 monitor.
7 Set the SDLC switch on the 91518 Multigas Analyzer to terminated ( ).
Figure 1-3 on page 1-5 for rear panel information).
012-0242-00]) can be connected to the tee cable to extend the distance of the 91518 from the monitor
Figure 2-5 on page 2-5).
Note:
If using more than one Flexport, Spacelabs Healthcare recommends the use of the Flexport Holder
(P/N
650-0201-00).
91518 Multigas Analyzer Service Manual 2-4
Figure 2-4: 91518 connections to 90367/69, 91369, 91370 monitors, with Flexport
Setup
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 012-0152-00
tee cable
To peripheral device
Flexport interface
extension cable
P/N 012-0619-00
or 012-0242-00
91518 Multigas Analyzer Service Manual 2-5
Figure 2-5: 91518 connections to 90367/69, 91369, 91370 monitors,
using Flexport and extension cable
Setup
P/N 012-0601-xx
SDLC
jack (J3)
cable
91387
SDLC
jack (J9)
91518
91387 Monitor Installation
To install the 91518 with the 91387 monitor:
1 Verify that the AC power is connected as required by local standards. The 91518 Multigas Analyzer will not
require the use of an external power supply.
2 Ensure that the monitor and multigas analyzer are powered OFF.
3 Assemble the required cables for your system configuration (refer to Figure 2-6 for part numbers).
4 Connect the SDLC cable (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 (J9) of the monitor.
5 Set the SDLC switch on the 91387 monitor 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 install the 91518 with the 91387 monitor:
1 Verify that the AC power is connected as required by local standards. The 91518 Multigas Analyzer will not
require the use of an external power supply.
2 Ensure that the monitor and multigas analyzer are powered OFF.
3 Assemble the required cables for your system configuration (refer to Figure 2-7 for part numbers).
4 Connect the SDLC cable (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 (J9) of the monitor.
5 Set the SDLC switch on the 91387 monitor to unterminated ( ).
91518 Multigas Analyzer Service Manual 2-6
Setup
P/N 012-0601-xx
SDLC
jack (J3)
cable
91387
SDLC
jack (J9)
91518
P/N 012-0152-00
cable
Flexport
To peripheral
device
interface
SDLC
jack (J2)
SDLC terminator
P/N 012-0507-02
6 Set the SDLC switch on the 91518 Multigas Analyzer to unterminated ( ).
7 Connect the Flexport cable (012-0152-00) to J2 of 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
91518 Multigas Analyzer Service Manual 2-7
Setup
J2
J3
P/N 012-0601-xx
SDLC
jack (J3)
cable
90364/90491/
90499/90387
91518
90364, 90491, 90499, and 90387 Module Housing or Monitor Installations
To install the 91518 with 90364, 90491, 90499, and 90387 module housings or monitors:
1 Verify that the AC power is connected as required by local standards. The 91518 Multigas Analyzer will not
require the use of an external power supply.
2 Ensure that the monitor or module housing and multigas 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 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 the 90364/90491/90499/90387 to unterminated ( ).
6 Set the SDLC switch on the 91518 Multigas Analyzer to terminated ( ).
Figure 2-8: 91518 connections to 90364, 90491, 90499, and 90387 monitors or housings
91518 Multigas Analyzer Service Manual 2-8
Setup
J2
J3
P/N 012-0601-xx
SDLC
jack (J3)
cable
90364/90491/
90499/90387
91518
SDLC
jack (J2)
To peripheral
Flexport
SDLC terminator P/N 012-0507-02
interface
P/N 012-0152-00
cable
device
90364, 90491, 90499, and 90387 Module Housing or Monitor Installations with Flexport
To install the 91518 with 90364, 90491, 90499, and 90387 module housings or monitors:
1 Verify that the and AC power is connected as required by local standards. The 91518 Multigas Analyzer will
not require the use of an external power supply.
2 Ensure that the monitor or module housing and multigas analyzer are powered OFF.
3 Assemble the required cables for your system configuration (refer to Figure 2-9 for part numbers).
4 Connect the SDLC cable (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 the 90364/90491/90499/90387 to unterminated ( ).
6 Set the SDLC switch on the 91518 Multigas Analyzer to unterminated ( ).
7 Connect the Flexport cable (012-0152-00) to J2 of 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 2-9: 91518 connections to 90364, 90491, 90499, and 90387 monitors or housings,
91518 Multigas Analyzer Service Manual 2-9
with Flexport
Setup
J6
90485 Remote
P/N 012-0175-01
SDLC
terminator
P/N 012-0507-02
SDLC
jack (J2)
91518
SDLC termination
switch
Module Housing
tee cable
AC power
Power supply
P/N 119-0480-00
90485 Remote Module Housing Installation
1 Verify that AC power is connected as required by local standards. An external power supply
(P/N
119-0480-00 or 119-0251-00) is required for use with the 91518 Multigas Analyzer.
2 Ensure that the module housing and multigas analyzer are powered OFF.
3 Assemble the required cables for your system configuration (refer to Figure 2-10 for 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
5 Connect P2 of the tee cable (P/N 012-0175-01) to the remote module housing.
6 Set the SDLC switch on the 90485 remote module housing to unterminated ( ).
7 Set the SDLC switch on the 91518 Multigas Analyzer to terminated ( ).
Figure 1-3 on page 1-5 for rear panel information).
91518 Multigas Analyzer Service Manual 2-10
Figure 2-10: 91518 connections to a remote module housing
Setup
J6
90485 Remote
SDLC
jack (J2)
91518
Module Housing
AC power
Power supply
P/N 119-0480-xx
P/N 012-0175-01
tee cable
P/N 012-0152-00
tee cable
SDLC
termination
switch
To peripheral device
Flexport interface
SDLC
terminator
P/N 012-0507-02
90485 Remote Module Housing Installation with Flexport
1 Verify that AC power is connected as required by local standards. An external power supply
(P/N
119-0480-00 or 119-0251-00) is required for use with the 91518 Multigas Analyzer.
2 Ensure that the module housing and multigas analyzer are powered OFF.
3 Assemble the required cables for your system configuration (refer to Figure 2-11 for 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
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 module housing.
7 Set the SDLC switch on the 90485 remote module housing to unterminated ( ).
8 Set the SDLC switch on the 91518 Multigas Analyzer to terminated ( ).
Note:
If using more than one Flexport, Spacelabs Healthcare recommends the use of the Flexport Holder
(P/N
Figure 1-3 on page 1-5 for rear panel information).
650-0201-00).
91518 Multigas Analyzer Service Manual 2-11
Figure 2-11: 91518 connections to a remote module housing
Setup
Room air
Hospital
scavenging
system
Gas
outlet
port
Connecting the Multigas Analyzer to a Scavenging System
To prevent pollution of the operating room, the gas sample should be vented from the operating room. Connect
the gas outlet port of the multigas analyzer (refer to Figure 1-2 on page 1-4) to the hospital scavenging system
(or anesthesia machine), or return the gas to the patient circuit.
Caution:
Do not connect the multigas analyzer directly to a vacuum scavenging system. Strong scavenging
suction can change the operating pressure of the multigas analyzer and can cause inaccurate
readings or damage to the analyzer.
Scavenging Through the Hospital Scavenging System
• Connect an exhaust 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 larger than the exhaust line.
Caution:
Only connect the scavenging line to an open scavenging system, where the gas is removed at
room pressure. Do not connect the multigas analyzer directly to a vacuum scavenging system.
Figure 2-12: Scavenging through hospital ventilation
Scavenging Through the Anesthesia Machine Gas Scavenging System
Some anesthesia machines are equipped with an anesthesia gas scavenging system (AGSS). You may be
able to connect the multigas analyzer scavenging line directly to the AGSS. Refer to the documentation that
came with your anesthesia machine to determine if the scavenging line can be connected to the AGSS.
91518 Multigas Analyzer Service Manual 2-12
Setup
Anesthesia
machine
Multigas Analyzer
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
91518 Multigas Analyzer Service Manual 2-13
Setup
Power Up Verification
Prior to the initial use of a new analyzer (or a one that has just been serviced), verify the analyzer basic
performance using the following procedure. For equipment calibration, refer to Maintenance on page 4-1.
Note:
The 91518 Multigas Analyzer must be calibrated onsite prior to use and immediately after servicing.
Equipment Required
• Spacelabs Healthcare monitor
• SDLC cable
• Water trap
• Gas sampling line
Standalone Test
1 Insert a water trap (if one is not already present) into the analyzer front panel 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 Power ON the monitor.
5 Power ON the analyzer.
6 Verify that the front panel ON/OFF button illuminates.
7 Verify that the pump starts within approximately 30 seconds.
8 Verify that the fan is operating.
9 Power OFF the analyzer.
System Test
1 Verify that the unit has passed the standalone test.
2 Connect the 91518 to a patient monitor as detailed in Multigas Setup on page 2-2.
3 Power ON the patient monitor.
4 Power ON the 91518.
Note:
The monitor must be powered on before the multigas analyzer.
5 Verify that the GAS parameter key and memory message appear on the monitor screen.
91518 Multigas Analyzer Service Manual 2-14
Setup
6 Wait for at least two minutes for the gas sensors to warm up.
Note:
During warm up, other status messages may appear.
7 Connect the sampling line to the sampling line connector on the front of the water trap (refer to Figure 1-2
on page 1-4).
8 Breathe at least five breaths into the sample line.
9 Verify that a CO2 waveform and EtCO2 numerics appear on the monitor screen.
10 Verify that an O2 level of 16 to 23% appears.
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 appears on the monitor
screen within 20
12 Reinstall the water trap.
13 Verify that the leak detected message disappears.
If the water trap is not reinstalled within 40 seconds, the pump will shut off. To restart the sequence:
seconds.
a Touch GAS.
b Touch RESUME SAMPLING
c Touch YES.
14 Hold a finger over the water trap input (or pinch shut the sample line) to block air flow. Verify that the
message OCCLUSION - Check System appears on the monitor screen within 30
seconds.
91518 Multigas Analyzer Service Manual 2-15
Theory
Interface
& Power PCBA
Multigas Module
Rear
SDLC_26-pin
SDLC_9-pin
PD Dev.
Ports
AC
BRICK
DC in
I/O
I/O
Serial / USB
Debug
DC
Serial / Pwr / cntl
Switch
Switch
/LED
AC
Input
Power
On
Gas
Sampling
Front
SDLC Termination
Switch
Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Interface PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Gas Analyzer Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Oxygen Measuring Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Overview
The 91518 Multigas Analyzer is a side stream gas analyzer, measuring real time concentrations of O2, CO2,
N
O and anesthetic agents (halothane, enflurane, isoflurane, desflurane and sevoflurane).
2
The interface PCBA communicates through a two-way SDLC connection to the Spacelabs Healthcare monitor.
Warning:
If any halogenated anesthetic agent other than halothane, isoflurane, enflurane, desflurane, or
sevoflurane is present, 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 mixture
of sevoflurane and enflurane occur in the sample circuit.
• When administering anesthetic agents, always verify your anesthetic vaporizer setting.
Note:
The 91518 Multigas Analyzer automatically identifies which agent is detected, but it cannot measure more
than one agent at a time.
91518 Multigas Analyzer Service Manual 3-1
Figure 3-1: 91518 Product overview block diagram
Multigas
Module
91518 Interface/Power PCBA
RS485
Xcvr
SDLC_9-pin
Serial / USB
Debug
BDM
Sniff1
Sniff 2
Ethernet
USB
Power
Switch
& LED
AC
input
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
S/N rom
pcb ID
config
UART
Test /
Debug
Brick
supply
100-250VAC /
18.6 - 21V
(40W)
Interface
Core
Gas
Sampling
SW
SDLC
Termination
Switch
Power
On/Off
Power
On/Off
REAR FRONT
Regulators
PO_+5V
PO_+12V
PO_-12V
PO_+5V
PO_+12V
PO_-12V
SDLC
Theory
91518 Multigas Analyzer Service Manual 3-2
Figure 3-2: 91518 Detailed block diagram
Loading...