4.8 Testing Short Pieces of Rope 



Short sample pieces of rope can be tested in the Magno- 

 graph. If calibrated LMA readings are required the 

 sample must protrude at least 5 feet on either side of 

 the sensing head. This is required to contain the 

 auxiliary magnetic field. The LF readings are quite 

 insensitive to this 'end effect' and short test pieces 

 may be used if LF readings are required. 



A-42 



