4o4 Conducting a Field Test 



Choosing the Proper Rope Guide and Adapter Tube 



The instrument is equipped with 5 sets of rope guides 

 and 4 sets of adapter tubes. The smallest set of guides 

 and tubes that will allow free movement of the rope 

 should be used in the sensor head when testing a rope. 

 Table4.1 gives a general guide line for the rope guides 

 used. Adapter tubes should be chosen to fit the rope 

 guide selected. 



Rope P.P. 



1/2 - 3/4 in (12-20 mm) 

 3/4 - 1 1/8 in (20-27mm) 

 11/8-1 9/16 in (27-39mm) 



1 9/16 - 2 in (39-51mm) 



2 - 2 1/2 in ( 51-64mm) . 



Note - Rope Guide E does not require an adapter tube 



4.4.1 Installing and Changing Adapter Tubes 

 (Refer to Fig. 4.3) 



With the sensor head open undo the knurled screws hold- 

 ing the rope guides in place and remove the rope guides . 



Insert a screw driver blade into the hole at the end of 

 the adaptor tube and pull one end up. The tube can then 

 be removed from the sensor head by hand. 



To install the new adapter tube the same procedure is 

 followed in reverse. When installing the tube be sure 

 that the end of the tube is aligned with the end of the 

 sensor head so that the small 'locating' pins on the 

 adaptor tube will mate with the locating holes on the 

 head. 



Note - The magnetic attraction of the head is very 



strong. Caution must be used to prevent injury. 



Table 4.1 



Rope Guide 



A 



B 



C 



D 



E 



Note - 



A-23 



