INTERSPIRO Spiroguide II User manual

31268F91
ENGLISH
SWEDISH
SPIROGUIDE II
User Manual - Handhavande Manual

TABLE OF CONTENTS  INNEHÅLLSFÖRTECKNING
USER MANUAL  ENGLISH
 SAFETY NOTICE......................................................... 
 CYLINDER MOUNTING ............................................... 
 INSTALLING / REMOVING HUD................................... 
 ADJUSTING SIZE ....................................................... 
 DONNING.................................................................. 
 STARTUP TEST......................................................... 
 DURING USE ............................................................. 
 CYLINDER PRESSURE WARNING ................................ 
 AUTOMATIC DISTRESS SIGNAL UNITADSU OPTIONAL 
 REMOVING THE APPARATUS...................................... 
 CLEANING AND DISINFECTING ................................... 
 SERVICE AND TESTING .............................................. 
 BATTERIES................................................................ 
 STORAGE AND TRANSPORT....................................... 
 EXTRA AIR CONNECTION............................................ 
 USAGE WITH AIRLINE SYSTEM................................... 
 MARKINGS............................................................... 
HANDHAVANDE MANUAL  SVENSKA
 SÄKERHETSANVISNINGAR ........................................ 
 MONTERING AV FLASKA............................................ 
 ANSLUTA / TA LOSS HUD........................................... 
 JUSTERA STORLEKEN ................................................ 
 PÅTAGNING .............................................................. 
 STARTTEST............................................................... 
 UNDER ANVÄNDNING ................................................ 
 FLASKTRYCKSVARNINGAR ........................................ 
 RÖRELSELARM ADSU/PASS TILLVAL ...................... 
 TA AV APPARATEN..................................................... 
 RENGÖRING OCH DESINFICERING.............................. 
 SERVICE OCH TEST.................................................... 
 BATTERIER................................................................ 
 FÖRVARING .............................................................. 
 EXTRA LUFTANSLUTNING .......................................... 
 ANVÄNDNING MED LUFTFÖRSÖRJNINGSSYSTEM ....... 
 MÄRKNING............................................................... 

1
2
3
4
5
6

7
8
9
10
11
12
Ok!

13
14
15
16:a
17
18
2 x
–
+
–
16:b
+
−
+
−
+
−


SPIROGUIDE II BASIC MODEL
USER MANUAL
BREATHING APPARATUS WITH DIGITAL DISPLAY
WIRELESS HEADSUP DISPLAY
This product, supplying breathing air to the user, has been tested in accordance with
EN 137 Type 2, and is to be used according local regulations.
Manufacturer:
Interspiro AB
Box 2853, 18728 Täby, Sweden.
SpiroGuide II consists of:
• Breathing Apparatus Computer (BAC)
• Digital Display located at the pressure gauge
• QS II Breathing Apparatus
• Optional Heads-Up Display (HUD) located inside the face mask
• Optional fully integrated Automatic Distress Signal Unit (ADSU) / Personal Alert
Safety System (PASS)
 SAFETY NOTICE
The product must only be used with Interspiro cylinders:
Spirolite 3.4L, 6.7L, cylinder pack 323.4 or 326.7
Aluminum line 6.8L or 9.0L
Steel 4L or 6L.
ATTENTION! BREATHING APPARATUS WITH TWIN CYLINDER AND CYLINDER PACK CONFIGURATIONS: SPIROLITE ,L OR
,, COMPOSITE WITH ALUMINUM LINER ,L OR ,L AND STEEL CYLINDERS L OR L, EXCEEDS THE TOTAL WEIGHT
LIMIT ACCORDING TO . IN EN :.
The product must only be used by personnel in good health and trained in the use
of respiratory protective equipment. Individuals with beards or large sideburns may
not obtain an adequate seal. The apparatus must be maintained, serviced and tested
as described in this user manual, Interspiro service manuals and Interspiro test
instructions.
INTERSPIRO IS NOT RESPONSIBLE FOR
COMBINATIONS OF PRODUCTS, UNLESS PUT TO MARKET BY INTERSPIRO
CHANGES OR ADAPTATIONS MADE TO THE PRODUCT BY A THIRD PARTY


Changes to this document - necessitated by typographical errors, inaccuracies of
current information or improvements and changes of equipment - may be made at any
time without prior notice. Always refer to www.interspiro.com for product updates,
document updates and service bulletins. Exposure to extreme conditions, may require
dierent procedures rather than those described in this manual. The guarantees and
warranties specied in the conditions of sale are not extended by this Safety Notice.
The breathing air with which the cylinders are charged must meet the requirements
according to EN 12021, being free from oil, toxic substances and having low humidity.
The duration of a compressed air breathing apparatus depends on the volume of air
in the compressed air cylinder(s) and the air consumption, which is specic to the
wearer and is aected by the work load. When taking air from the extra air connection,
which some models are equipped with, the air consumption increases and the
duration of the apparatus decreases.
When operating with two separate independently-valved cylinders, both cylinders
must be charged with similar working pressures. Always open both cylinder valves
when pressurizing the breathing apparatus and ensure that both cylinder valves are
kept open during the use of the apparatus.
If tted with a mechanical warning whistle, that warning will be activated at a slightly
dierent pressure than the low air warning triggered by the BAC. For safety reasons,
the rst warning activated should be heeded
If the self contained breathing apparatus is to be used in conjunction with other
personal protective equipment it is important to ensure that the additional personal
protective equipment is compatible with the breathing apparatus and does not impair
the full protection of the respiratory protective device.
Examples of dangers which may require the use of additional personal protective
equipment:
-Liquids, steam or gases which can damage the skin.
-Pollutants absorptive by skin
-Thermal radiation
-Mechanical eects
-Explosive environments.


 CYLINDER MOUNTING
SINGLE CYLINDER
. Check that the cylinder strap buckle is positioned with the buckle as close to the
backplate as possible. Place the cylinder on the backplate. [Fig. 1]
. Check the connection O-ring and screw the cylinder valve hand tight to the
cylinder connection of the manifold block. [Fig. 1]
NOTE! FOR CYLINDER QUICK COUPLING SEE SECTION CYLINDER QUICK COUPLING OPTION.
. Fasten cylinder strap buckle around the cylinder and hook together with the
buckle. Adjust the length of the strap if needed. Do not over tighten. If the strap is
over tightened the buckle and backplate will be damaged.
. Close the lever on the buckle. Make sure that the locking tab has locked the lever
in the closed position. (To release the cylinder buckle the locking tab must be
pressed down.) [Fig. 2]
TWIN CYLINDERS
ATTENTION! WHEN OPERATING WITH TWO SEPARATE INDEPENDENTLYVALVED CYLINDERS, BOTH CYLINDERS MUST
BE CHARGED WITH SIMILAR WORKING PRESSURES. ALWAYS OPEN BOTH CYLINDER VALVES WHEN PRESSURIZING
THE BREATHING APPARATUS AND ENSURE THAT BOTH CYLINDER VALVES ARE KEPT OPEN DURING THE USE OF THE
APPARATUS.
. If previously used for single cylinder start by disengaging the cylinder strap from
the four lugs on the backplate. [Fig. 3]
. Check that the cylinder strap is positioned with the buckle as close to the
backplate as possible.
. If applicable, mount the strap holder and the cylinder distance piece. [Fig. 4]
. Check the connection O-ring and screw the T-piece to the cylinder connection of
the manifold block - Do not tighten. [Fig. 5]
. Place the cylinders on the backplate with the strap holder between the cylinders.
Check that the hoses are positioned between the cylinders and not squeezed
between the cylinders and backplate. [Fig. 6]
. Check the connection O-rings and screw the cylinder valves hand tight to the
cylinder connections of the T-piece.
. Tighten the T-piece to the manifold block by hand.
. Fasten the cylinder strap buckle around the cylinders and hook together with the
buckle. Adjust the length of the strap if needed. Do not over tighten. If the strap is
over tightened the buckle and backplate will be damaged.
. Close the lever of the buckle. Make sure that the locking tab has locked the lever
in the closed position. (To release the cylinder buckle the locking tab must be
pressed down.) [Fig. 2]


CYLINDER PACK
Mounting
. Place the cylinder pack on a flat surface with the cylinder valve towards you.
. Check the connection O-ring and screw the cylinder valve hand-tight to the cylinder
connection of the manifold block. [Fig. 7]
NOTE! FOR CYLINDER QUICK COUPLING SEE SECTION CYLINDER QUICK COUPLING OPTION.
. Fit the holes of the cylinder bracket onto the guide washers and push the backplate
away from you until the harness clicks in position [Fig. 8]. Check that the cylinder
pack is mounted properly by liing the harness carefully in the upper and lower part
of the backplate.
Dismounting
. Unscrew the cylinder connection of the manifold block from the cylinder valve.
. Push the locking arm on the upper part of cylinder bracket and pull the harness
towards you at the same time.
QUICK COUPLING OPTION
Connection
Connect the cylinder valve adapter with the cylinder connection manifold. Press together
until the manifold “clicks” into the cylinder valve [Fig. 10].
Check that the connection is properly locked by checking that the surfaces are in line
with each other [Fig. 10].
Disconnection
Disconnect by pressing the ring of the quick coupling away from the cylinder valve and
removing the manifold [Fig. 11].
NOTE! EXISTING EQUIPMENT CAN BE UPGRADED TO CYLINDER QUICK COUPLING.
 INSTALLING / REMOVING HUD
INSTALLING THE WIRELESS HUD
. Place one side of the HUD on an angle inside the mask and press down.
. Make sure the right and le side of the HUD are securely seated in the rounded
areas of the mask rubber, and below the two protruding lugs on the visor.
REMOVING THE WIRELESS HUD
. Li one end of the HUD and remove it from the mask.


 ADJUSTING SIZE
NOTE! WHEN STANDING STRAIGHT WITH THE BREATHING APPARATUS DONNED THE MAJORITY OF THE WEIGHT SHALL BE
CARRIED ON THE HIPS AND NOT THE SHOULDERS.
To adjust the height of the hip belt, push the red buttons under the hip belt together and
slide the complete hip belt up or down to the correct size. [Fig. 12]
The harness can be adjusted into four dierent sizes. Size indications are available on
both the front and backside of the harness.
 DONNING
NOTE! THIS SECTION DESCRIBES HOW TO DON THE APPARATUS PERFORMING A “SHORT TEST” DURING THE STARTUP.
FURTHER INFORMATION REGARDING THE STARTUP TEST AND INSTRUCTIONS FOR PERFORMING THE “FULL TEST” ARE GIVEN
IN SECTION .
. Connect the breathing hose to the breathing valve. [Fig. 13]
. Connect the face mask and breathing valve according to the instructions given in the
user manual for the face mask.
. Loosen the shoulder straps and the waist belt and put on the apparatus.
. Place the neck strap over the head.
.Fasten the waist belt buckle and tighten, ensuring that the majority of the weight is
carried on the waist and not the shoulders. [Fig. 14]
.Adjust the shoulder straps and tuck in any loose straps. If applicable fasten the
chest strap and tighten, tuck in any loose straps. [Fig. 15]
. Switch o positive pressure.
. Open the cylinder valve fully. The apparatus now starts to perform the start-up test.
. Check that the HUD is fully pushed down inside the mask.
. Don the face mask according to the instructions given in the face mask user manual.
. Check the Digital Display and conrm “TEST OK” or failure indication (see section 6)
by pressing the backlight button (section 7, Fig. 7-A) on the display.
 STARTUP TEST
“SHORT TEST” AND “FULL TEST”
When the cylinder valve is opened, an automatic start-up check is performed.
Depending on user interaction, either a “Short Test” or a “Full Test” is performed.
The Short Test is performed in accordance with the section “Performing the Short Test”
and automatically performs the following tests:
- Cylinder pressure above pre-set level (conguration dependent)
- Battery has at least two hours of operation
- Electronic systems are working


When the test is complete, the test results must be conrmed by the user. See the
section titled “Test Results” below.
The Full Test is performed in accordance with the section “Performing the Full Test”
and automatically performs the following tests:
- Cylinder pressure above pre-set level (conguration dependent)
- Battery has at least two hours of operation
- Electronic systems are working
- Leak tightness
- Air flow capacity
When the test is complete, the test results must be conrmed by the user. See the
section titled “Test Results,” below.
TEST RESULTS
When the test is nalized, the display reads “TEST OK”, or shows a failure indication.
Should there be more than one failure, the indications are given in sequence.
Pressing the backlight button (section 7, Fig. 7-A) toggles to Run mode or to the next
failure indication. If the backlight is not lit, the rst press on the backlight button will
light the backlight and a second press will toggle to Run mode or to the next failure.
TEST OK
PRESS LEFT
FAILURE
LOW CYL !!!
FAILURE INDICATION EXPLANATION
LOW CYL !!! CYLINDER PRESSURE BELOW PRESET LEVEL CONFIGURATION
DEPENDENT
LOW BATT BATTERY HAS LESS THAN  HOURS OF OPERATION 
LEAKAGE THE UNIT FAILED THE LEAK TIGHTNESS TEST 
CAPACITY THE UNIT FAILED THE AIR FLOW CAPACITY TEST 
ADSU/PASS THE UNIT FAILED THE MOVEMENT SENSOR TEST 
 Replace battery immediately aer the current operation or if possible before the operation is continued.
 Only conducted if Full Test is performed
ATTENTION! ALWAYS FOLLOW YOUR ORGANIZATION’S POLICY TO DETERMINE WHETHER AN OPERATION MAY BE
PERFORMED AFTER THE OCCURRENCE OF FAILURE INDICATIONS.
PERFORMING THE “SHORT TEST”
. Open the cylinder valve fully. The display reads according to the gure below.
INTERSPIRO


. Check the sound.
CHECK SOUND
. The display reads according to the gure below for three seconds.
FULL TEST
HOLD BLACK
. The display reads according to the gure below for two seconds.
SHORT TEST
. The display will stop and show the result of the test until the backlight button is
pressed. See the section titled “Test Results”.
PERFORMING THE “FULL TEST”
. Open the cylinder valve fully. The display reads according to the gure below.
INTERSPIRO
. Check the sound.
CHECK SOUND
. Press the backlight button (section 7, Fig. 7-A) during the three seconds that the
display reads according to the gure below.
FULL TEST
HOLD BLACK
. The display reads according to the gure below for two seconds.
FULL TEST


. Check the yellow and red LEDs (section 7, Fig. 7-A) on the display and the yellow
and red BAC-light. If applicable check green, yellow and red LEDs on the HUD.
CHECK
LEDs
. Close the cylinder valve and press the backlight button. Make sure to completely
close the cylinder valve before pressing the backlight button.
CLOSE CYL
PRESS BLACK
. The SpiroGuide II performs a leakage test.
LEAKAGE
TEST
. For Tally key activated SpiroGuide II the display will read according to the gure
below. If the tally is not inserted from the start the display will rst read “INSERT
TALLY“ and then “REMOVE TALLY“ when the tally has been inserted.
REMOVE
TALLY
. Shake the Digital Display Unit when the display reads according to the gure
below. Alarm sound will stop when DDU has been shaken
SHAKE
DDU
. Do not move the Digital Display unit when the display reads according to the
gure below. The pre alarm sound and full alarm sound is tested
DO NOT SHAKE
DDU


. Press the red button when the display reads according to the gure below.
PRESS RED
. Panic alarm sound is tested.
CHECK SOUND
. For SpiroGuide II with SpiroLink activated, press red and black buttons to test the
evacuation alarm when the display reads according to the gure below.
HOLD BLACK
&
PRESS RED
. The evacuation sound alarm is tested while the display reads according to gure
below
EVAC!!!
. Activate the positive pressure of the breathing valve to exhaust the air from the
system when the display reads according to the gure below.
ACTIVATE PP
=POS.PRESS.
. If activated, the Display indicates the electronic low pressure warning setting
while the sound of the electronic whistle is tested .
WHISTLE
55 BAR
. Replace Tally in the DDU if applicable
INSERT
TALLY


. The display will stop and show the results of the test until the backlight button is
pressed. See the section titled “Test Results” above.
. The display will toggle between the two gures below. To shut down the
SpiroGuide II press the backlight button. To go into Run mode, switch o the
positive pressure of the breathing valve and open the cylinder valve
SHUT OFF PP
OPEN CYL
->RUN
CLOSE DOWN?
FIT TALLY
PRESS BLACK
 DURING USE
DIGITAL DISPLAY Optional tally
Digital display
with yellow and
red backlight
Panic Button
Red and yellow LED
Backlight /
Scroll button
Fig. 7-A
When the unit is in Run mode with the ADSU/PASS activated (see section 9), the
yellow LED flashes.
DURING USE, THE DIGITAL DISPLAY CAN SHOW THREE DIFFERENT VALUES:
. Cylinder pressure in Bar or PSI
. Calculated remaining time in Minutes
. Absorbed temperature in Celsius or Fahrenheit
. Cylinder pressure graph in quarters
Depending on the conguration, the display can show one, two, three or all four of
these values. Furthermore, either of these four values can be shown as the default,
second third and fourth priority value.
Pressing the backlight button (Fig. 7-A) activates the backlight of the display for four
seconds. Pressing the backlight button once more while the backlight is lit toggles to
the next value according to congured priorities.


If only one value is shown, there is no toggle function and the backlight button works
as a backlight only.
Pressing the backlight button repeatedly toggles between values. When the backlight
is switched o aer four seconds the display will always show the default value.
During use, the remaining air time is calculated based on the previous air
consumption. Since the value is calculated, the displayed time can be both shorter
or longer than the actual remaining time, depending on the previous and future work
load and rate of breathing.
The remaining time information must only be used as a complement to the cylinder
pressure information. Low air warnings must always be heeded, regardless of the
remaining time indication.
Until the rst value is calculated from the air consumption, the display shows
“CALC ...”. The rst value is displayed when there has been a signicant pressure
drop, normally aer one to two minutes of breathing.
The remaining time is calculated to the activation of the low air warning.
The unit can be congured to have a heat alarm. When the absorbed temperature has
reached the trigger value, the alarm is activated. An audible beep sounds, the display
alternates to show ‘‘TEMP!!!’’ and the display and main BAC LED flash red.
A battery symbol is always shown on the Digital Display. The symbol shows the battery
capacity of the BAC batteries in four steps. With the Low Battery warning the symbol
starts to flash.
TURN AROUND PRESSURE REFERENCE POINTS TAP REFX OPTIONAL
TAP is a tool for operations when working on one and the same spot. The TAP value
is based on the initial cylinder pressure and the air consumption to reach the spot
where the TAP is calculated.
To calculate TAP, press and hold the backlight button (Fig. 7-A) for 5 seconds until the
display reads TAP REFA xx bar.
To recalculate TAP, press and hold the backlight button (Fig. 7-A) for 5 seconds until
the display reads TAP REFB xx bar, each new calculation gets a new letter.


HEADSUP DISPLAY HUD  OPTIONAL
A light sensor automatically adjusts the brightness of the LEDs according to the
ambient light conditions. This may take up to 10 seconds.
CYLINDER PRESSURE INDICATION
%  % GREEN, YELLOW, YELLOW, RED IS LIT
%  % YELLOW, YELLOW, RED IS LIT
%  LOW AIR YELLOW, RED IS LIT
LOW AIR   RED IS FLASHING
THE DEFAULT SETTING FOR “LOW AIR” IS  BAR.
The HUD can be congured with a dierent light sequence.
If the pressure changes quickly, there may be a delay of 2 seconds until the cylinder
pressure information is updated in the HUD. During normal use (breathing) this is not
noticeable.
WARNING INDICATIONS
BATTERY WARNING
BATTERY WARNING YELLOW IS FLASHING
ATTENTION!: WHEN A BATTERY WARNING IS GIVEN, THE BATTERY MUST BE REPLACED IMMEDIATELY AFTER THE
CURRENT OPERATION.
When the battery warning activates, there are at least 2 hours of operation le. Refer
to section 12 for instructions about determining low battery in HUD and BAC, and
about battery replacement.
SHUTDOWN
On the le side, the four LEDs flash simultaneously two times. This occurs when the
unit is depressurized.


OPTIONAL WARNINGS
ADSU/PASS PREALARM SEE SECTION  RED IS FLASHING
ADSU/PASS ALARM SEE SECTION  RED IS LIT
INTERNAL EVACUATION SIGNAL SEE SECTION  RED IS LIT
LINKING THE HUD
The HUD must be linked together with the SCBA (BAC) before use. The linking only
needs to be performed once as long as the same SCBA (BAC) and HUD will be used
together. If a SCBA will be used with dierent HUDs it has to be linked before each use.
The linking of the HUD can only be performed with the SCBA unpressurized.
. Press and hold the black button on the Digital Display Unit until the display reads
“CONNECTING”.
. Place the magnet located on the Tally Key (Fig. 7-A) to the side of the HUD having
two LEDs, the right hand side when wearing the mask. The red and yellow LED lights
up.
. When removing the Tally key the red light goes out and the yellow continues. The
. Within approximately 20 seconds the HUD and BAC will link. The BAC beeps, the
Digital display reads “HUD CONNECTED” and all six LEDs in the HUD flash two times.
WARNING! IF NOT ALL LEDS ON THE HUD ARE LIT IT MUST BE IMMEDIATELY BE REMOVED FROM SERVICE.
. Press and hold the black button on the Digital display until it switches o.
CHECK HUD LINK
The HUD link can be checked to ensure that the HUD is linked to the correct SpiroGuide
II.
To check the HUD link, hold the backlight button for two seconds, release it for one
second and then hold it again for two seconds. Aer the Backlight button has been
released, the two LED lights on the righ hand side of the HUD will start to flash if it is
linked to the SpiroGuide II unit.
NOTE: ONLY ONE USER CAN CHECK THE HUD LINK AT THE TIME. IF SEVERAL USERS TEST THE HUD LINK AT ONCE IT WILL
BE IMPOSSILBLE TO TELL IF THE HUD IS LINKED TO THE CORRECT SPIROGUIDE II OR NOT.
BREATHING APPARATUS COMPUTER BAC
The BAC is measuring the pressure and supplying the information to the Digital Display
and HUD. It logs all usage data which can be accessed with a PC interface (optional).
During Run mode, the main LED flashes yellow as a position light.
In addition to the main LED, there are two yellow LEDs for added visibility.


 CYLINDER PRESSURE WARNINGS
LOW AIR WARNING
Default value is set to 55 +/- 5 bar. It can be congured to a higher pressure (up to
75 bar).
LOW AIR WARNING INDICATION
HUD flashes the red LED or according to congured settings (if tted with HUD)
BAC emits a warning sound
Main LED of the BAC flashes red
Display LED flashes red
MUTABLE LOW AIR WARNING OPTIONAL
Mute the low air warning for one minute by pressing the backlight button (section 8)
TURNBACK SIGNAL OPTIONAL
It can be set as a static value between 75 and 175 bar or as a dynamic value based on
the initial cylinder pressure.
At this level the display backlight turns red and is automatically lit for 10 seconds.
If the cylinder pressure increases above the set level, the turn-back signal is re-set.
If tted and function activated, the HUD flashes (the active pressure indication LEDs)
for 10 seconds.
NOTE: WHEN DEPRESSURIZING THE UNIT RAPIDLY AFTER USE, THE SPIROGUIDE II SOMETIMES SHUTS DOWN WITHOUT
ANY LOW AIR WARNING OR TURN BACK SIGNAL.
REDUCED VOLUME OPTIONAL
To reduce volume when for example working in gas tight suits, pressurize the
SpiroGuide II and press the panic button when the display reads as shown below.
REDUCED SPL
PRESS RED
Press backlight button when the display reads as shown below.
REDUCED SPL
PRESS BLACK


. AUTOMATIC DISTRESS SIGNAL UNITADSU OPTIONAL
ACTIVATION/DEACTIVATION AND ALARM RESET
VERSION WITH TALLY KEY ADSU
Remove the Tally by pulling it straight out from the display unit to activate the ADSU.
Once in alarm mode the ADSU can only be re-set by inserting the Tally.
VERSION WITHOUT TALLY KEY PASS  PRESSURE STARTED
The ADSU is activated when the unit is pressurised.
To re-set the alarm rst, press and hold the backlight button and then press the panic
button. To turn it o, de-pressurize the unit and then rst press and hold the backlight
button and then press the panic button.
DURING USE
The yellow LED on the Digital Display starts to flash and the BAC beeps when the
ADSU is in sensing mode. When there is a lack of motion for 30 seconds the ADSU will
go into pre-alarm. This is indicated by an escalating audible signal from the BAC and
alternate flashing of the yellow and red LEDs on the Digital Display and the main LED
of the BAC.
Aer the pre-alarm, the unit enters alarm mode.
When activated, the unit may be put into alarm mode at any time by pressing the
panic button.
In alarm mode the BAC emits a loud audible signal, the yellow and red LED on the
Digital Display will alternate, the backlight of the display flashes yellow and red and
the main LED on the BAC flashes red.
INTERNAL EVACUATION SIGNAL
This function is conguration dependent and only available on the version with the
tally key. To activate, press and hold the backlight button and then press the panic
button.
The signal is the same as the alarm mode described above, but with a dierent
intermittent warning sound.
 REMOVING THE APPARATUS
. Switch o the positive pressure.
. Open the buckles to release the head harness, loosen the strap and remove the
face mask.
. Close the cylinder valve.
NOTE: TO PREVENT UNINTENTIONAL CLOSING OF THE CYLINDER VALVE, THE HAND WHEEL MUST BE PUSHED IN BEFORE
IT CAN BE TURNED.
. If applicable unfasten the chest buckle.
. Unfasten the waist belt buckle and loosen the shoulder straps.
. Remove the apparatus and activate the positive pressure to purge air from the
system. Deactivate the Automatic Distress Signal Unit as described in section 9.
. Disconnect the HUD (if tted) according section 3.