ISO8100-2-2019_extract

IS08100-2:2019(Emasses,the applicant shall specify them and indicate,in addition,whether the adjustment is by stagesor continuous.The applicant should choose the suspended mass in kilograms by dividing the anticipated braking forcein newtons by 16,to aim at an average retardation of 0,6 gn.A complete safety gear assembly,as agreed with the laboratory,together with the number of brakeshoes necessary for all the tests,shall be placed at the disposal of the laboratory.The number of setsof brake shoes necessary for all the tests shall be attached.For the type of guide rail used,the lengthspecified by the laboratory shall also be supplied.5.3.3.2Test5.3.3.2.1Method of test5.3.3.2.1.1 The test shall be carried out in free fall.Direct or indirect measurements shall be made of:a)the total height of the fall;b)the braking distance on the guide rails;c)the sliding distance of the overspeed governor rope,or that of the device used in its place;d)the total travel of the elements forming the spring.Measurements a)and b)shall be recorded as a function of the time.5.3.3.2.1.2 The following shall be determined:a)the average braking force;b)the greatest instantaneous braking force;c)the smallest instantaneous braking force.5.3.3.2.2 Test procedure5.3.3.2.2.1 Safety gear certified for a single massThe laboratory shall carry out four tests with the mass (P+Q)1.Between each test,the friction partsshall be allowed to return to their normal temperature.During the tests,several identical sets of friction parts may be used.However,one set of parts shall be capable of:a)three tests,if the rated speed does not exceed 4 m/s;b)two tests,if the rated speed exceeds 4 m/s.The height of free fall shall be calculated to correspond to the maximum tripping speed of the overspeedgovernor for which the safety gear can be used.The engagements of the safety gear shall be achieved by a means allowing the tripping speed to be fixedprecisely.For example,a rope may be used,the slack of which should be carefully calculated,fixed to a sleevewhich can slide with friction over a fixed smooth rope.The friction effort should be the same as theeffort applied to the operating rope by the governor attached to this safety gear.copmge memateralonrights reserved11