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(GB) Self-braking belay descender device
Nomenclature of parts
(1) moving side-piece, (2) safety catch, (3) friction
runner, (4) side-piece pivot, (5) cam, (6) anti-error
catch, (7) fi xed side-piece, (8) handle. Principal
materials: aluminum alloy (side-pieces), stainless
steel (cam), chrome-plated steel (anti-error catch).
Checking, points to verify
Check before each use: the fi xed and moving
side-pieces; the cam (check the wear indicator*-
see drawing) and the friction runner; the locking
components (safety catch, side-piece pivot), and
the operation of the springs in the cam, the safety
catch, and the anti-error catch. Finally, carry out
the operational check (see diagram 2).
* Warning, when the cam groove becomes worn
all the way to the wear indicator, discontinue use
of the I'D. Depending on the rope diameter and
condition of the sheath, the descender may not
possess suffi cient braking power.
If in any doubt, return the device to PETZL for
checking.
Instructions for use
This device can help prevent some errors, but not
all of them. The user must receive specifi c training
and always remain alert. The use of gloves is
strongly recommended.
Always tie a knot in the end of the rope.
Positions of the handle
(a) transport, (b) work positioning, (c) descent and
belaying, (d) panic locking.
Diagram 1. Installation of the rope
Attach the I'D either to the harness (A) (device is
moving), or to the anchor (B) (device is fi xed).
Open the moving side-piece. Insert the rope as
indicated by the engraving on the device. The
handle must be in position (c).
Close the moving side-piece (security catch) on a
locked carabiner.
Diagram 2. Operational check
Before each use, to check the correct installation of
the rope and correct operation of the device, a test
must always be carried out while self-belayed.
(A) Moving device: before descending, transfer
bodyweight onto the device, rope taut, (handle
in position c). Check that the device locks onto
the rope. Holding the free end of the rope in one
hand, pull progressively on the handle with the
other, allowing the rope to run. When the handle
is released, the I'D brakes, then locks onto the
rope. If the I'D does not lock, or if descent is
not possible due to the device remaining locked
whatever is done to the handle, check that the rope
is correctly installed. With bodyweight still on the
device, check the operation of the panic lock by
pulling hard on the handle (position d): the device
brakes then locks onto the rope.
(B) Fixed device (use for belaying or evacuation):
when the rope from the second or the load is
strongly pulled (handle in position c), the device
must lock onto the rope. Warning, in the case of
an error (rope threaded backwards) the anti-error
catch will not work. With the device under load,
check the operation of the panic lock by pushing
hard on the handle (position d): the device brakes,
then locks onto the rope.
Diagram 3. Descent
Moving device (position c), installed on the
harness: braking control is effected by loosening
or tightening the grip on the free end of the rope,
while unlocking the rope by pulling the handle
5
Notice SpécifiqueD20 I'D réf. : D20900-04 210302
with the other hand. Locking is achieved simply
by releasing the handle. In a panic situation: if the
handle is pulled too much (position d) the device
brakes, then locks onto the rope. To continue
the descent, fi rst move the handle upwards
(position c).
Warning, if the I'D is held in a horizontal position
by the hand, the braking function can be rendered
inoperative.
For extra braking friction, pass the free end of the
rope through a carabiner.
Warning, this extra friction carabiner can lock
the I'D into a horizontal position and render the
braking function inoperative.
Diagram 4. Work positioning
After having stopped at the desired position, to
lock the device onto the rope, turn the handle in
the opposite direction to that of the descent, then
pull it down as far as possible without forcing it
(position b); this position varies according to the
diameter of the rope. For work positioning (both
hands off of the rope), the I'D must be set in this
position. To unlock the system, hold the free end of
the rope in one hand, and with the other return the
handle to the descent position.
Diagram 5. Occasional rope climbing
Moving device (position c or d), installed on the
harness.
The required movements are as follows:
- hang from the I'D,
- Slide the handled rope clamp/grab
ASCENSION (B17) up the rope, while lifting the
foot in the footloop (this rope clamp / grab must
be attached to the harness by a lanyard).
- stand up in the footloop attached to the rope
clamp/grab (B17) while pulling the slack rope
through the device (never allow slack to develop in
the rope),
- hang once again from the I'D,
- move up the rope clamp/grab (B17) once again,
and so on.
Diagram 6. Lowering from a fi xed anchor-
point
The device is attached to the anchor: the free end
of the rope must pass through a carabiner for extra
braking friction. Hold this free end and push the
handle upwards (position c) to unlock the device.
Diagram 7. Lowering from the harness
The device is attached to the harness. To lower
a person, attach yourself to a secure anchor,
then brace yourself in a stable position and use
a supplementary braking system. The device is
then used in a manner similar to that shown in
diagram 3.
Diagram 8. Evacuation in exceptional
circumstances: accompanied descent
Moving device, attached to the harness: must only
be used by rescuers trained in this technique. Maxi
250 kg, no impact loading tolerated, must be used
with a supplementary braking system.
Belaying
Pay attention to the safety of the belayer: it is
absolutely necessary that he/she be belayed so as
to avoid any risk of a fall.
Slow falls and lightweight climbers: numerous
rubbing-points over a long length of rope can
reduce the transmission of impact force onto the
device. This can delay the braking action on the
rope.
Diagram 9. Belaying the leader
Use a dynamic rope certifi ed to EN 892. The device
is attached (position c) to the second's harness
(check that the rope is properly inserted before
use): the belayer holds the free end of the rope
with one hand, and the leader's rope with the other.
For easier running of the rope, it is more important
to push the free end into the device, rather than
to pull the rope through from the leader's side. To
stop a fall, pull fi rmly on the free end. To lower,
use the device in a manner similar to that shown in
diagram 7.
Diagram 10. Belaying the second / Self-
belaying
The device is attached (position c) to the anchor:
with one hand, the belayer holds the free end
of the rope, and with the other, the rope to the
second. Take in the rope regularly. To stop a fall,
pull fi rmly on the free end of the rope. To lower,
use the device in a manner similar to that shown in
diagram 6.
Warning, in the case of an error (rope incorrectly
installed), the anti-error catch will not work with
the I'D in this position.
Diagram 11. Anti-return lifting point + simple
hauling system
The device is attached (position c) to the anchor:
the I'D can be used as an anti-return point to
tension a rope or to lift a load.
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