Sundstrom SR 540 EX User manual

2019-10-23
OI06H-6018 SR 540 EX 1
Operating instruction
SR 540 EX
Revision: 02

2019-10-23
OI06H-6018 SR 540 EX 2
General information
Instructions for use for SR 540 should be read before use.
When working in potentially explosive environments all parts of the equipment must be EX-approved
SR 540 EX shield can be used with the SR 507 compressed air attachment.
SR 540 EX shield can be used with the SR 500 EX fan unit in potentially explosive environments.
SR 540 EX face shield in combination with fan unit SR 500 EX are approved in accordance with
EN 12941:1998, class TH3.
SR 540 EX in combination with SR 507 and air hose SR 358 or SR 359 are approved in accordance with EN
14594:2005, class 3B.
SR 540 EX in combination with SR 507 and air hose SR 360 are approved in accordance with EN
14594:2005, class 3A.
Risk analysis should be carried by a person who has suitable training and experience in the area.

Unpacking SR 540 EX
Packing list:
• Face shield
• Breathing hose
• User instruction
• Cleaning tissue
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1. Assembly
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1.1 Check that the O-ring of
the hose is in place.
Check that the flat gasket is
ok and in place at the other
end.
1.2 Connect the end with the
flat gasket to the face shield.
Turn it clockwise about 1/8 of
a turn.
1.3 Connect the hose to the
fan unit and turn it clockwise
about 1/ 8 of a turn.

2. Performance check, minimum flow
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OI06H-6018 SR 540 EX 5
2.1 Check that the fan unit is
complete, correctly mounted,
thoroughly cleaned and
undamaged.
Connect the hose from the
face shield to the fan unit and
turn it about 1/8 of a turn
clockwise.
2.2 Turn the flow meter bag
inside out and the flow meter
appears.
2.3 Place the face shield in
the flow meter bag and start
the fan.
Grip the lower part of the bag
in order to seal around the
hose.
Grip around the measuring
tube and hold the tube
vertical.
The ball should now float
level with or just over the 175
l/min marking.
If the minimum flow is not
achieved, check that:
-The flow meter is vertical
-The ball moves freely
-The bag seals well around
the hose

3. Putting the face shield on
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OI06H-6018 SR 540 EX 6
3.1 Raise the visor and put
the face shield on. If
necessary, adjust the
circumference of the head
harness by means of the
knob at the rear of the head
harness.
3.2 If necessary, adjust the
head harness in height by
lengthening or shortening the
strap for the top of the head
3.3 Lower the visor unit by
pulling the face seal down
under your chin.

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OI06H-6018 SR 540 EX 7
3.4 A clicking sound indicates
that the visor unit has been
lowered fully.
3.5 Insert a finger between
your chin and the face seal
and run the finger along the
contact surface of the face
seal all the way round to
check that it fits well against
the face.
3.6 Check that the breathing
hose runs along your back
and that it is not twisted.

4. Visor
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4.1 Remove the closing
panels by pushing them
forward with your thumb.
4.2 Release the visor by
moving the lever of the over-
centre lock upwards through
about 180 degrees.And
remove the visor.
4.3 Remove the protective
film from the new visor.
Secure the new visor first to
the fixed mounting and then
to the over-centre mounting.

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OI06H-6018 SR 540 EX 9
4.4 Tension the visor by
moving the lever downwards
as far as it will go.
4.5 Check that the visor is
firmly in contact with the visor
opening seal all round.
4.6 Fit the closing panels by
pushing them into place with
your fingers. A clicking sound
indicates that they are in
place.

5. Face seal
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OI06H-6018 SR 540 EX 10
5.1 Release the hooks from
the head harness.
5.2 Release the face seal by
pulling it´s frame so that its
pins are released from the
visor unit holes.
Remove the face seal.
5.3 Thread the new face seal
over the visor unit flange, with
the centre markings in line
with one other.
5.4 Press the face seal frame
down so that the pins drop
into the visor unit holes. A
clicking sound indicates that
they are in place.
Secure the hooks to the head
harness in the place where
sweatband is relieved.
Like 5.1.