3.7 Lifetime and period of use
Conditions of use and other factors may influence its useful life. You may therefore even
have to repair or retire this product earlier (see below).
The shorter the descent height, the more often the rope will run through the descender
device until the device has to be inspected. Short descent heights will therefore wear o
the rope. Wear-o is also induced by other factors such as maintenance, sharp edges,
chemical and mechanical influences etc. After max. 100 descents the rope has to be
changed. Abrasion and usage have to be regularly checked. If the rope does not seem
safe anymore, send the device to MARK Save A Life or a authorized person to check
and replace the rope.
Information on work according to EN 341:2011 -1A (30kg - 225kg)
• work capacity: 7 500 000 Joule
work W = m x g x h x n
W = work in Joule (J)
m = load capacity (weight of the person) (kg)
g = gravity 9.81 m/s²
h = descent height in meter (m)
n = number of descents
Possible influencing factors
• extreme use conditions
• mechanical and chemical damage
• environmental factors
• inappropriate storage and transport
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