For similar reasons running past the end of an earlier 

 rope test (as would occur in retesting past d2) should 

 also be done with care. An example of running over a 

 previous test is shown in Fig. 4. 15. As can be seen the 

 magnetization ending from the previous test looks very 

 much like an LMA decrease due to wear. In this partic- 

 ular test there is no marked reaction in the LF trace 

 that generally accompanys an LMA decrease of this size. 

 This helps to pinpoint the end of the previous test. 

 As wear increases however, the LF trace will have a 

 larger amplitude and cannot be used effectively to 

 indicate the end of a rope test. Keeping track of 

 where tests start and finish and overlapping charts of 

 adjacent test is a more positive method. 



H i 1 (—-I 1 — f- . ■ -, ■ 4-H-- i- ■!-■; :.---i.-j— H \ 1 1 1 



hT \ i \ ii I h M 1 1 M I f i i r M r I 1 1 1 1 1 r 1 1 I 1 1 1 I I I n I III 1 1 M l I I I I r M l 1 1 1 1 I I I in 1 1 mi I III II I 1 1 urn II I 



Fig. 4.16 Showing End of Magnetization from previous 

 test. (1 3/4" 6x27 Flattened Strand) 



In Fig. 4.9 the LMA zero setting vs. nominal rope 

 weight is shown. This allows the rope weight to be 

 estimated by the zero setting. This graph represents 

 rope weight of 'magnetized' rope with 'magnetized' 

 indicating that the rope on either end of the machine 

 has been magnetized. 



A-41 



