9
7. Preparing for use
IMPORTANT
Scubatech recommends delivering a demand regulator to an authorized seller
for connecting accessories, such as: a pressure measurement device, medium
pressure tubes and second pressure reduction stages of demand regulators.
An authorized seller may also answer to questions regarding the issues
presented in these instructions.
For proper preparing a demand regulator for use, the following steps must be
performed:
equip a demand regulator with a device monitoring air pressure in a
cylinder/twinset,
check if a demand regulator kit is complete,
IMPORTANT
Connecting medium pressure hoses to high pressure outputs and using any
reductions
on
medium
and
high
pressure
hoses
is forbidden.
arrange properly medium pressure feeding hoses: buoyancy compensator, dry
suit, etc.
visually inspect the demand regulator's condition,
check if all connections and a mouthpiece are fastened properly,
test for tightness under negative pressure in the following way:
o
insert the mouthpiece of the second-staged demand regulator to your
mouth,
o
clog the air inlet to the first-staged demand regulator,
o
take a breath through the second-staged demand regulator,
o
the demand regulators are tight only if taking a breath is impossible,
IMPORTANT
Before screwing down a demand regulator to a diving cylinder/twinset, a seat
should be blown through with air. Check if the valve is unobstructed and clean.
Check if there is O-ring in the pressure reducing valve's ferrule and check its
condition. If the seal is damaged or worn out, it must be obligatorily replaced.
screw down the demand regulator to the diving cylinder's/twinset's seat, lightly
tightening, AND NOT APPLYING TOO MUCH PRESSURE,
slowly unscrew the cylinder's shut-off valve (valves),
CAUTION
When opening the cylinder's/twinset's shut-off valve, the front of the pressure
gauge should not be directed towards a user or other persons in case of its
malfunctioning.
