SKYLOTEC DEUS 7300 Instructions D'utilisation page 16

Descent Energy Calculation
The brake pads in the DEUS 7300 Series are designed to absorb 200 million joules of energy. Inspection
intervals are every 7.5 million joules. For ANSI customers, inspection intervals are every 406,750
thousand joules. If someone in your organization is responsible for equipment inspection contact
SKYLOTEC.
Calculation of descent energy is done as follows:
Multiply descent height (meters) times load (kilograms) times number of descents times 10. (The last
"10" refers to the acceleration constant of gravity. The actual acceleration constant of gravity is 9.8
meters/sec/sec. The value of 10 is used for simpler mental approximation. 9.8 can be used in your
usage log for greater accuracy.) The unit of measure of the resulting calculation is joules.
Example:
Assume an average weight per person of 220 lbs (100 kg), an average descent distance of 33 ft (10
meters) and 1,500 descents of this load and distance.
100 kg x 10 meters x 700 descents x 10 = 7,000,000 joules
It is the owner's responsibility to document and maintain a usage log that shows the cumulative descent
energy absorbed by the DEUS 7300 Series controlled descent device. A sample log is provided below,
which includes the calculations for descent energy, so you can track this.
DEUS Model:
Date placed in service:
A. B.
Date Name
16
DEUS Equipment Usage Log
DEUS Serial Number:
C. D.
Comment Load (kg)
E. F.
Descent Number of
distance descents
(meters)
G. H.
Descent Cumulative total
energy descent energy
(joules) (joules)
(DxExFx10)