Performance Check And Flow Meter; Donning - Sundstrom SR 500 Mode D'emploi

• Screw the combined filter /cartridge into the filter
mounting until it is in contact with the gasket. Then
turn it about 1/8 turn further to ensure a good seal.
Fig. 15.
IMPORTANT: The particulate filters used must be of
the same type (e.g. SR 510 or SR 710). The
combination filter/cartridges used must be of the
same type (e.g. SR 510/SR 532 or SR 510/SR 533).
IMPORTANT: A particulate filter (SR 510 or SR 710)
must always be used – either separately or in
combination with a chemical cartridge . Only the
SR 510 particle filter can be used in combination
with an SR 532 or SR 533 chemical cartridge.
WARNING: When filters or combined filter/
cartridges are changed, both must be changed at
the same time. DO NOT reuse filters/cartridges.
They are intended for one time use only. Failure to
follow this warning can result in serious personal
injury or death.
WARNING: If the respirator does not perform as
specified, it must not be used until it has been
checked by authorized personnel. Return to a
non-contaminated area immediately if you
experience unusual sensations (nausea, dizziness,
eye irritation, unusual odor or taste, excessive
fatigue, or difficulty breathing). Failure to follow
this warning can result in serious personal injury or
death.
4.7 Performance Check and Flow
Meter
On normal operation, the fan delivers at least 6.2CFM
(175 l/ min), and on boosted operation, at least 7.9CFM
(225 l/min). The automatic flow control system of the fan
unit maintains these flows constant throughout the
operating time.
WARNING: Failure to pass a user performance
check and complete all necessary repairs before
use may adversely affect respirator performance
and result in sickness or death.
WARNING: Failure to verify proper airflow from the
fan unit assembly may result in reduced perfor-
mance of the unit, resulting in serious personal
injury or death.
To check of the Manufacturer's Minimum Design Flow
(MMFD) proceed as follows:
• Check that the fan unit is complete, correctly
mounted, thoroughly cleaned and undamaged. A
fully charged battery must be installed.
• Start the fan unit (See 4.1).
• Install the proper breathing hose and facepiece or
headgear.
Place the facepiece or headgear in the flow meter (SR
356) and grip the lower part of the bag to seal around
the breathing hose. Note. You must not grip around
the rubber hose itself as this would either obstruct the
air flow or cause failure to achieve a proper seal. Grip
the flow meter tube with the other hand so that the tube
points vertically upwards from the bag. Fig. 19.
10
Read the position of the ball in the tube. This should
hover at a level with or slightly above the upper
marking on the tube, 6.2CFM (175 l/min). Fig. 20.
If minimum flow is not achieved, check that:
- the flow meter is held upright,
- the ball moves freely,
- the bag seals well around the hose.
WARNING: DO NOT use the respirator if the ball
does not rise completely above the line on the air
flow indicator. Failure to follow this warning can
result in serious personal injury or death.
Checking the alarms
The fan unit is designed to provide a warning if the air
flow is obstructed. This alarm function should be
checked in conjunction with the flow check before the
equipment is used. Proceed as follows:
• Provoke an air flow stoppage by gripping the top
part of the bag or by shutting off the flow meter
outlet. Fig. 21
• The fan unit should then initiate alarms by sound and
light signals and vibrations.
• If the air is again allowed to flow, the alarm signals
will automatically cease after 10 to 15 seconds.
• Switch off the fan unit and remove the flow meter.
WARNING: The flow and alarms performance
check should be checked on every occasion before
the fan unit is used.

4.8 Donning

After the filters /cartridges have been fitted, a
performance check has been carried out and the
respiratory inlet covering has been connected, the SR
500 can be put on. Before putting it on, read the user
instructions for the head top.
• Take the fan unit on and adjust the belt so that the
fan unit is firmly and comfortably secured at the
back of your waist. Fig. 22.
• Start the fan by pressing the control button.
• Put the respiratory inlet covering on.
• For headgear make sure that the breathing hose
runs along your back and is not twisted. Fig. 22.
When a full face mask is used, the hose should run
along your waist and up along the chest. Fig 23.
WARNING: Failure to pass a user performance
check and complete all necessary repairs before
use may adversely affect respirator performance
and result in sickness or death.
WARNING: Donning, doffing, and obtaining and
checking for a proper respiratory inlet cover seal
and SR 500 flow rate must be done in an area
known to be free of contaminants. The user must
have practiced this procedure before attempting to
use the respirator for respiratory protection.
Failure to follow this warning can result in serious
personal injury or death.