As A Descent Control Device; To Lower; Using The Mpd As A Descent Control Device - CMC Rescue MPD User Manual

8
When used to control a descent, the MPD design allows for easy adjustment
of the friction for the size of the load, rope type, and environmental and
terrain conditions. The speed of the descent is controlled by the friction of
the rope applied against the Fixed Brake V-Groove. Always start with the
running end held firmly back toward the anchor, parallel to the load end.
Reduce the friction by varying the angle at which the running end enters the
MPD. Maximum friction is applied when the Secondary Friction Post is used.
AT NO POINT SHOULD THE RUNNING END OF THE ROPE HAVE AN ANGLE
!
OF LESS THAN 90º TO THE LOAD END OF THE ROPE.
Edge transitions can be the most challenging part of an operation. Using the
MPD as a descent control device allows for a high degree of responsiveness
and control. As the rescuer or rescuer and patient approach the edge, it is
very easy to take in rope through the MPD to prepare for the edge transition.
Pretensioning of the Main Line is also simplified because of this.

TO LOWER

To lower, firmly grip the running end of the rope and tightly hold it against
the Fixed Brake V-Groove, bringing it back toward the anchor and parallel to
the load end, creating an "S-shaped" bend in the rope as it passes through
the MPD. Pass the rope over the Secondary Friction Post for heavier loads if
needed. Unlock the Parking Brake and then firmly grip the Release Handle.
For the most comfortable hand operating position, before pulling outward on
the handle, give a slight clockwise turn of the wrist, then pull out to engage
the release mechanism.

AS A DESCENT CONTROL DEVICE