Fig. 4.3 Adapter tube and rope guide installation 



4. A. 2 Installing &. Positioning the Sensor Head on the Rope 



The sensor head can be mounted in any position for test- 

 ing. When positioning on the rope care should be taken 

 that the wheels are free to move and that the head is 

 secured to prevent it being carried away by lumps of 

 lubrication or protruding wires . The rope guides act 

 as slip planes between the rope and the head and are 

 capable of taking the weight of the head on them. 



It is advisable to locate the head so that no large 

 pieces of metal are closer than one foot to it, the 

 sides in particular. This can cause some distortion 

 in the magnetic field which may compromise the readings , 



A typical vertical testing arrangement is shown in Fig. 

 4.5 



A-24 



