Tec6+
Tec 6 Plus Vaporizer
Operation and Maintenance Manual
U
ser
R
espons
ibilit
y
1107-0641-000 2/26/01
This Product will perform in conformity with the description thereof contained in
this operating manual and accompanying labels and/or inserts, when
assembled, operated, maintained, and repaired in accordance with the
instructions provided. This Product must be checked periodically. A defective
Product should not be used. Parts that are broken, missing plainly worn,
distorted, or contaminated should be replaced immediately. Should repair or
replacement become necessary, Datex-Ohmeda recommends that a telephonic
or written request for service advice be made to the nearest Datex-Ohmeda
Field Service Support center. This Product or any of its parts should not be
repaired other than in accordance with written instructions provided by Datex-
Ohmeda and by Datex-Ohmeda trained personnel. The Product must not be
altered without the prior written approval of Datex-Ohmeda’s Quality Assurance
Department. The user of this Product shall have the sole responsibility for any
malfunction which results from improper use, faulty maintenance, improper
repair, damage, or alteration by anyone other than Datex-Ohmeda.
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Caution
U.S. Federal and Canadian law restrict this device to sale by or on the order of
a licensed medical practitioner. Outside the U.S.A. and Canada, check local
laws for any restriction that may apply
Datex-Ohmeda products have unit serial numbers with coded logic which
indicates a product group code. The year of manufacture and a sequential unit
number for identification.
AAA
A
12345
This alpha character indicates the year of product
manufacture and when the serial number was
assigned; “C” = 1999, “D” = 2000, “E” = 2001, etc. “I”
and “O” are not used.
1107-0641-000 2/16/01 1-1
1
Introduction
In this section
What this manual includes ..............................................................1-2
Precautions...............................................................................1-3
Symbols ..........................................................................................1-4
Tec 6 Plus Vaporizer
1-2 2/16/01 1107-0641-000
What this manual includes
Important
This manual contains the information required to install, operate and
maintain both the Datex-Ohmeda and the North American Dräger vari-
ants of the Tec 6 Plus Vaporizer. All of the graphics illustrated in this
manual show the Datex-Ohmeda variant, unless the procedure differs
for the North American Dräger variant.
Section 1
tells you how to use this manual and supplies information
about the symbols used on the equipment.
Section 2
provides functional descriptions and theory of operation for
the major components.
Section 3
describes all the controls and indicators on the vaporizer.
Section 4
tells you how to mount the vaporizer on a manifold.
Section 5
provides operating instructions, including a preoperative
checkout and instructions for filling the vaporizer.
Section 6
provides maintenance instructions, including cleaning the
vaporizer and a list of spare parts. Maintenance procedures are re-
stricted to those detailed in this manual.
Section 7
provides the theory of operation for the alarm and indicator
display and vaporizer delivery system.
Section 8
provides information for troubleshooting the vaporizer.
Section 9
contains specifications for the vaporizer.
Section 10
contains the warranty.
Section 11
contains Datex-Ohmeda’s servicing policy.
Requests for servicing facilities, advice or assistance must be ad-
dressed either to a local Datex-Ohmeda office or to a Datex-Ohmeda
Authorized Distributor.
Datex-Ohmeda strongly recommends that you keep all relevant docu-
mentation, including this manual and accompanying labels, immedi-
ately available to all users.
Introduction
1107-0641-000 2/26/01 1-3
Precautions
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WARNING
Do not fill the vaporizer with any substance other than
Suprane™ (desflurane) as specified on the front label. If
any substance other than Suprane™ (desflurane) is used,
patient injury could occur.
U.S. Federal and Canadian law restrict this device to sale
by or on the order of a licensed medical practitioner.
Outside the U.S.A. and Canada, check local laws for any
restrictions that may apply.
Before using the Tec 6 Plus Vaporizer, you must be
familiar with the Suprane™ (desflurane) package insert.
Failure to conform to the recommendations on the insert
can result in patient injury.
Do not attempt to use a vaporizer that has been dropped.
A dropped vaporizer MUST be sent to the nearest Datex-
Ohmeda Field Operations Unit for servicing. See
Section 11 for complete shipping instructions.
Do not use malfunctioning equipment. Make all necessary
repairs or have the equipment serviced by an authorized
Datex-Ohmeda service center. After repair, test the
equipment to ensure that it is functioning properly, in
accordance with the manufacturer’s published
specifications.
Important:
European Standard EN 740 -
Anesthetic Workstations and Their Mod-
ules
requires that an appropriate gas monitor is used to monitor the
concentration of anesthetic agent vapor in the inspiratory gas when
the vaporizer is in operation in order to provide protection against haz-
ardous output in the event of a device malfunction.
Datex-Ohmeda strongly recommends the use of anesthesia gas mon-
itoring with this equipment. Refer to local standards for mandatory
monitoring.
Tec 6 Plus Vaporizer
1-4 2/16/01 1107-0641-000
Symbols
Warnings and Cautions tell you about dangerous conditions that can
occur if you do not follow all instructions in this manual.
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WARNING
Warnings tell about a condition that can cause injury to the
operator or the patient.
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CAUTION
Cautions tell about a condition that can cause damage to
the equipment. Read and follow all warnings and cautions.
Systems with this mark agree with the European
Council Directive (93/42/EEC) for Medical Devices
when they are used as specified in their Operation
and Maintenance manuals. The xxxx is the certifica-
tion number of the Notified Body used by
Datex-Ohmeda's Quality Systems.
Symbol Location Meaning
Control Dial Standby setting
Interlock Block Setting mark - dial marking alignment point for required setting
Interlock Block Equi-potential stud - connection for minimizing electrical potential difference
Front Panel Auditory alarm mute button
Display Panel 240 ml refill mark - indicates that an additional 240 ml of agent can be added
Display Panel Symbolizes nominal agent level display when 390 ml of agent in sump (max.)
Display Panel Symbolizes agent level display when 60 ml or more of agent in sump (min.)
Rear Label
Rear Label The degree of protection against electric shock is Type B
Top Plate Label Direction of flow
Various Warning
Various Caution
AC electrical supply must be single phase sinusoidal alternating current.
The voltage requirement for the vaporizer appears on this label.
1107-0641-000 2/16/01 2-1
1Description
In this section
What is a Tec 6 Plus Vaporizer?.....................................................2-2
Components....................................................................................2-6
Power supply unit .....................................................................2-6
Filler assembly..........................................................................2-6
Drain plug .................................................................................2-7
Power cord and battery.............................................................2-7
Equi-potential stud....................................................................2-8
Sump ........................................................................................2-8
Heater elements .......................................................................2-8
Sensors.....................................................................................2-8
Agent level sensor....................................................................2-9
Tilt switch..................................................................................2-9
Tec 6 Plus Vaporizer
2-2 2/16/01 1107-0641-000
What is a Tec 6 Plus Vaporizer?
The Tec 6 Plus Vaporizer adds Suprane™ (desflurane) inhalant anes-
thetic vapor to the medical gasses supplied to a patient. The Datex-
Ohmeda vaporizer should be used in anesthesia systems equipped
with a Selectatec
®
Series Manifold only.
The North American Dräger vaporizer should be used in anesthesia
systems equipped with an exclusion manifold. Both variants of the Tec
6 Plus Vaporizer must be supplied with dry medical gas and be con-
nected to a suitable AC power supply.
The Tec 6 Plus Vaporizer is designed to meet UL 2601-1, EN 60601-
1 and IEC 601-2-13.
Figure 1-1 • Tec 6 Plus Vaporizer, Datex-Ohmeda variant (left), and North American Dräger variant (right)
NO OUTPUT
WARM UP
ALARM
BATTERY LOW
USE ONLY DESFLURANE
LOW AGENT
OPERATIONAL
Refer to manual before use.
Calibrated for use at flows of 0.2 to 10 L/min. and
at ambient temperatures of 18C to 30C at 1013mb.
Warning
High vaporizer settings with low gas flows may
lead to hypoxic mixtures within the breathing
circuit. Ohmeda strongly recommends the use of
oxygen monitoring.
Warning
• Keep upright at all times.
• Do not autoclave.
• Not for use in the prescence of
flammable anaesthetic agents.
• Only to be used in conlunction
with an O monitor.
See manual for
• Operational Instructions.
• Factors affecting performance.
• Service and maintenance
recommendations.
Next service date
Lock
before
use
1
23
4
5
6
7
8
10
12
14
16
18
Tec 6 Plus
Use only
Desflurane
Use only
Desflurane
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM–UP
USE ONLY DESFLURANE
OPERATIONAL
Tec 6 Plus
Refer to manual before use.
Calibrated for use at flows of 0.2 to 10 L/min. and
at ambient temperatures of 18C to 30C at 1013mb.
Warning
High vaporizer settings with low gas flows may
lead to hypoxic mixtures within the breathing
circuit. Ohmeda strongly recommends the use of
oxygen monitoring.
Warning
• Keep upright at all times.
• Do not autoclave.
• Not for use in the prescence of
flammable anaesthetic agents.
• Only to be used in conlunction
with an O monitor.
See manual for
• Operational Instructions.
• Factors affecting performance.
• Service and maintenance
recommendations.
Next service date
1
23
4
5
6
7
8
10
12
14
16
18
Description
1107-0641-000 2/16/01 2-3
Mechanical and electrical interlocks incorporated into the vaporizer
help to ensure that:
• The vaporizer dial can only be turned from
n
(Standby) when
the vaporizer is locked onto the manifold and the green
OPERATIONAL light is illuminated to indicate that the
vaporizer has attained the correct operating temperature.
• Only one vaporizer can be operated at a time.
• The gas flow only enters the selected vaporizer.
• Unwanted anesthetic trace vapor is minimized after the
vaporizer is turned to
n
(Standby).
Important:
European Standard EN 740 -
Anesthetic Workstations and Their Mod-
ules
requires that an appropriate gas monitor is used to monitor the
concentration of anesthetic agent vapor in the inspiratory gas when
the vaporizer is in operation in order to provide protection against haz-
ardous output in the event of a device malfunction.
Datex-Ohmeda strongly recommends the use of anesthesia gas mon-
itoring with this equipment. Refer to local standards for mandatory
monitoring.
Tec 6 Plus Vaporizer
2-4 2/16/01 1107-0641-000
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WARNING
This manual and its associated documentation must be
studied before any attempt is made to install, operate or
clean any part of the Tec 6 Plus Vaporizer.
The performance of the anesthesia machine and vaporizer
can be degraded if the machine and vaporizer are mis-
matched.
To avoid explosive hazards, flammable anesthetic agents
such as Ether and Cyclopropane must not be used in this
vaporizer. Only anesthetic agents which comply with the
requirements for non-flammable anesthetic agents in the
IEC 601-2-13 Standard, particular requirements for the
safety of anesthesia machines, are suitable for use in the
presence of this vaporizer.
As this vaporizer is not suitable for use with flammable
anesthetic agents such as Ether or Cyclopropane, the use
of antistatic breathing tubes and face masks is not
necessary. The use of antistatic or electrically conductive
breathing tubes when utilizing high frequency electric
surgery equipment may cause burns and is therefore not
recommended in any application of this vaporizer.
The functioning of this vaporizer can be adversely effected
by the operation of equipment such as high frequency
surgical apparatus or short-wave therapy equipment in the
vicinity.
Do not operate the vaporizer other than with dry medical
gases.
The Tec 6 Plus Vaporizer must not be used in a Magnetic
Resonance Imaging environment.
The functioning of this Tec 6 Plus Vaporizer can be
adversely affected by electromagnetic interference
exceeding the levels specified in EN 60601-1-2.
This product contains a small quantity of Mercury in the tilt
switch mechanism and should be disposed of according to
local regulations.
Do not attempt to use a vaporizer that has been dropped.
A dropped vaporizer MUST be sent to the nearest Datex-
Ohmeda Field Operations Unit for servicing. See
Section 11 for complete shipping instructions.
Description
1107-0641-000 2/16/01 2-5
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CAUTION
If the vaporizer is not likely to be used for a period of 12
months, remove the battery. Failure to do so can result in
damage to the vaporizer. The battery must be placed back
into the vaporizer before use.
A 'No Output' alarm could be caused by downstream high
frequency ventilation at greater than 60 breaths/min with
an airway pressure of 100cm H
2
O or pulsing the O
2
flush
faster than 1 pulse/sec over a time period of greater than
10 seconds.
Tec 6 Plus Vaporizer
2-6 2/16/01 1107-0641-000
Components
Power supply unit
The Tec 6 Plus Vaporizer operates from a 100 to 120VAC 50/60 Hz or
220 to 240V AC 50/60 Hz electrical supply. A label on the rear panel
of the vaporizer states the voltage requirement for the vaporizer.
The integral power supply unit consists of a transformer and an AC to
DC converter that provides the 12VDC and 5VDC supplies for the
electrical system.
Filler assembly
The filler assembly uses an agent specific fitting to ensure that only a
Suprane™ (desflurane) specific bottle equipped with a Saf-T-Fill™
valve can be inserted to fill the vaporizer.
Figure 1-2 • Filler assembly
FILLER
ASSEMBLY
FILLER
PORT
FILLER
AA.43.037
Use Only
Desflurane
Description
1107-0641-000 2/16/01 2-7
Drain plug
The drain plug is located at the base of the vaporizer (see Figure 2-3).
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CAUTION
Do not remove the drain plug. Draining the vaporizer can
result in rapid loss of pressure and/or agent, which could
lead to injury to the operator. It must only be removed at a
Datex-Ohmeda Authorized Service Center.
Figure 1-3 • Vaporizer base
Power cord and
battery
If the AC power supply fails, a Duracell MN1604 or VARTA Energy
2000 battery incorporated in the base of the vaporizer provides power
for the auditory and visual alarms only. The battery must be replaced
annually.
Figure 1-4 • Power cord and battery
DRAIN
PLUG
D
POWER CORD
DURACELL
DURACELL
mn 623r
ghc hjv
DURACELL MN 1604 OR
VARTA ENERGY 2000 BATTERY
Tec 6 Plus Vaporizer
2-8 2/16/01 1107-0641-000
Equi-potential stud
The equi-potential stud
Y
is located on the top of the vaporizer. When
connected, it minimizes any electrical potential difference between the
vaporizer casing and the anesthesia system.
Figure 1-5 • Equi-potential stud
Sump
The sump contains the agent and includes the agent filling port, the
drain, the heaters and the agent level sensor.
The sump has a total nominal capacity of 390 milliliters (ml) which con-
sists of a nominal 330 ml indicated volume and a nominal 60 ml
reserve.
Heater elements
Two 100W heater elements, located in the base of the sump, heat the
agent to a nominal 39 °C (102 °F) to generate the working pressure.
Two 100W heater elements located in the upper part of the vaporizer
help prevent condensation of the anesthetic agent in the vaporizer.
The current supplied to power the heaters alternates between the two
heaters in the sump and the two heaters in the upper part of the vapor-
izer. This minimizes the current requirement.
While it is connected to the electrical supply, the casing of the vapor-
izer is normally warm to the touch.
Sensors
Internal electro/mechanical sensors monitor and maintain the fresh
gas/agent vapor pressure balance and the agent volume.
The internal sensors monitor and display operational status and acti-
vate the appropriate alarm indication.
EQUI-POTENTIAL
STUD
Description
1107-0641-000 2/16/01 2-9
Agent level sensor
An agent level sensing probe measures the agent level. The power
must be on for the agent level sensor to activate. If the sump contains
between 60 and 390 ml of agent, the LCD level displays the agent lev-
el in the sump. For more information, see section 3, Controls and Indi-
cators.
Tilt switch
If the vaporizer is tilted for 10 seconds while the dial is on and it is in
operational mode and delivering vapor, vapor delivery will be stopped,
as indicated by the flashing NO OUTPUT light and auditory alarm.
Figure 1-6 • Tilt indicator (NO OUTPUT light)
AA.43.042
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Tec 6 Plus Vaporizer
2-10 2/16/01 1107-0641-000
This page left blank intentionally.
1107-0641-000 2/16/01 3-1
1Controls and Indicators
In this section
Controls...........................................................................................3-2
Dial and dial release.................................................................3-3
Lock lever .................................................................................3-4
Auditory alarm mute button.......................................................3-4
Auditory and visual indicators...................................................3-5
Alarm priority.............................................................................3-6
Status display..................................................................................3-7
Warm-up...................................................................................3-7
Operational...............................................................................3-8
Agent level display....................................................................3-8
Low agent level.........................................................................3-9
No output................................................................................3-10
Alarm battery low....................................................................3-11
Tec 6 Plus Vaporizer
3-2 2/16/01 1107-0641-000
Controls
Note that only the Datex-Ohmeda vaporizer has the lock lever as
shown.
Figure 3-1 • Tec 6 Plus Vaporizer controls (Datex-Ohmeda variant shown)
NO OUTPUT
WARM UP
ALARM
BATTERY LOW
USE ONLY DESFLURANE
LOW AGENT
OPERATIONAL
Refer to manual before use.
Calibrated for use at flows of 0.2 to 10 L/min. and
at ambient temperatures of 18C to 30C at 1013mb.
Warning
High vaporizer settings with low gas flows may
lead to hypoxic mixtures within the breathing
circuit. Ohmeda strongly recommends the use of
oxygen monitoring.
Warning
• Keep upright at all times.
• Do not autoclave.
• Not for use in the prescence of
flammable anaesthetic agents.
• Only to be used in conlunction
with an O monitor.
See manual for
• Operational Instructions.
• Factors affecting performance.
• Service and maintenance
recommendations.
Next service date
Lock
before
use
1
23
4
5
6
7
8
10
12
14
16
18
D
POWER CORD
RETAINING PLATE
BATTERY
COVER
POWER CORD
CHANNEL
POWER CORD
CONCENTRATION DIAL
DIAL RELEASE
LOCK
LEVER
AUDITORY ALARM
MUTE BUTTON
FILLER PORT CONTROLS
INDICATORS
STANDBY SETTING
EQUI-POTENTIAL STUD
Tec 6 Plus
Use only
Desflurane
Controls and Indicators
1107-0641-000 2/16/01 3-3
Dial and dial release When the operational light is on, push the dial release and turn the dial
to set the agent concentration. The dial cannot be turned from the
(standby) setting as long as the WARM-UP light is on.
Figure 3-2 • Concentration dial
You can select the level of agent concentration from 1% to 18%. The
dial is marked at intervals of 1% from 1% to 10% and at intervals of 2%
from 10% to 18%.
Use the dial release again to turn the dial from the (standby) setting
and to turn the dial from 12% to a higher percent setting. All other set-
tings can be made without operating the dial release.
A solenoid interlock mechanism ensures that the dial can be turned
from the (standby) setting only when the green OPERATIONAL
light is illuminated.
Figure 3-3 • Operational light
Tec 6
1
23
4
5
6
7
8
9
10
12
14
16
D
Åben
AA.43.040
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Tec 6 Plus Vaporizer
3-4 2/16/01 1107-0641-000
Lock lever Only the Datex-Ohmeda vaporizer has a lock lever. Turn the lever fully
clockwise to lock the vaporizer in position
Figure 3-4 • Lock lever
Auditory alarm mute
button
Push to silence alarms. Hold for three seconds to start the alarm test
(speaker sounds and indicators light up).
Figure 3-5 • Mute button
> 3 sec = Alarm test
< 3 sec = Alarm silence
Controls and Indicators
1107-0641-000 2/16/01 3-5
Auditory and visual indicators
The status of the vaporizer is indicated by both visual and auditory
alarms (see
Status display
).
Press the auditory alarm mute button , located above the display
panel, to mute an alarm (see
Agent level display
and
Alarm battery
low
).
The LCD agent level display indicates the level of agent. The range is
between 60 ml and 390 ml. When the indicator is below the 240 ml refill
mark , you can add an additional 240 ml of agent.
Figure 3-6 • Front panel display
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
60 ml
NOMINAL
AMBER/RED
AUDITORY ALARM
MUTE BUTTON
390 ml
NOMINAL
LCD AGEN
T
LEVEL
DISPLAY
240 ml
REFILL
MARK
GREEN
AMBER
AMBER
AMBER
AA.43.038
Tec 6 Plus Vaporizer
3-6 2/16/01 1107-0641-000
Alarm Priority
The Tec 6 Plus Vaporizer has three distinct alarm priorities. For each
priority there is a different set of visual and auditory signals:
Note:
An internal processor failure may also present an intermittent red No
Output LED and alarm tone.
Figure 3-7 • Alarm priorities
Alarm Priority Visual Signal Auditory Signal
High Rapid red flashing
light
Two sets of five
audio beeps every
10 seconds
Medium Amber flashing light One set of three au-
dio beeps every 25
seconds.
Low Continuous amber
light
One audio beep
only
Vap. Condition Low Battery Low Agent No Output
Dial ON Medium
Priority
Medium
Priority
High Priority
Dial ON,
Alarm Silence
Pressed
Low Priority Audio
silenced for
120 seconds,
then audio
active
High Priority
(pressing Si-
lence has
no effect)
Dial turned
to
Low Priority Low Priority
(dial locked
until condition
corrected)
Low Priority
(dial locked
until condition
corrected)
Controls and Indicators
1107-0641-000 2/16/01 3-7
Status display
If the dial is at when an alarm occurs, the auditory alarm does not
repeat.
Warm-up
The amber WARM-UP light is continuously illuminated when the va-
porizer is in warm-up mode. The dial cannot be turned from when
the vaporizer is warming up.
Figure 3-8 • Warm-up
AA.43.039
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Tec 6 Plus Vaporizer
3-8 2/16/01 1107-0641-000
Operational
The green OPERATIONAL light is continuously illuminated when the
vaporizer is in operational mode. The dial can be turned from when
the vaporizer is operational.
Figure 3-9 • Operational
Agent level display
The LCD agent level display consists of a series of bars that indicate
the nominal volume of agent in the vaporizer sump.
The symbol means there is approximately 390 ml of agent in the
sump. The symbol means there is 60 ml or more of agent in the
sump. No bar displayed means there is 60 ml or less of agent in the
sump.
As the sump fills, the first agent level indicating bar appears in the LCD
volume display when there is between 60 and 80 ml of agent in the
sump. As the level increases, more bars are displayed, as illustrated
in Figure 3-9, and as the level decreases, fewer bars are displayed.
When the bars are either level with or below the symbol, the sump
can accommodate 240 ml of agent, which is one full bottle. When there
are no bars visible, as illustrated in Figure 3-10, the LOW AGENT level
alarm is activated (see
Low agent level
).
Note:
The agent level display is calibrated to be most accurate when the
vaporizer is in a perfectly level position. Deviations from a level po-
sition affect the accuracy of the agent level display and may acti-
vate the LOW AGENT level alarm.
AA.43.040
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Controls and Indicators
1107-0641-000 2/16/01 3-9
Low agent level
This alarm indicates that there is less than 60 ml of agent remaining in
the sump and agent should be added.
Pressing mutes the auditory alarm for a period of 120 seconds to
allow time to fill the vaporizer to above 60 ml.
If a LOW AGENT condition occurs during normal operation, the alarm
is activated but the green OPERATIONAL light remains illuminated.
Figure 3-10 • Low agent level
AA.43.041
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Tec 6 Plus Vaporizer
3-10 2/16/01 1107-0641-000
No output
This alarm indicates that the vaporizer has shut down and is no longer
delivering vapor.
The NO OUTPUT alarm is activated if the dial is in the ON position and
any one of the following occurs:
• The agent level decreases to below 20 ml.
• The vaporizer is tilted for more than 10 seconds.
• A power failure of longer than 10 seconds duration occurs.
• An internal malfunction is detected.
Figure 3-11 • No output
If the NO OUTPUT alarm occurs while the vaporizer is in use, the va-
porizer dial must be turned to .
This action de-escalates the alarm to a low priority and illuminates the
amber light continuously. Either an alternative vaporizer or an alterna-
tive method of anesthesia must be used.
If the NO OUTPUT alarm is activated as a result of a power failure and
the dial is at when the power supply is restored, the alarm and dis-
play test is activated and the vaporizer returns to either the WARM-UP
or the OPERATIONAL mode.
If the dial is not at when the power supply is restored, the NO OUT-
PUT alarm continues and can only be cancelled by turning the dial
to . In this condition, the alarm and display test is not activated and
the vaporizer returns to either the WARM-UP or the OPERATIONAL
mode.
AA.43.042
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
Controls and Indicators
1107-0641-000 2/16/01 3-11
Alarm battery low
This alarm indicates that the alarm battery voltage is low. A new bat-
tery must be installed as soon as practical to support the NO OUTPUT
alarm in the event of a subsequent external power failure.
If an ALARM BATTERY LOW condition occurs during normal opera-
tion, the alarm is activated but the green OPERATIONAL light remains
illuminated.
Figure 3-12 • Alarm battery low
AA.43.043
DESFLURANE
NO OUTPUT
LOW AGENT
ALARM
BATTERY LOW
WARM-UP
OPERATIONAL
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