9. LMA Gain Potentiometer: 



-Set according to LMA 

 gain chart. 



-calibrates chart record 

 to show metallic area 

 losses as a percent of 

 nominal rope metallic 

 area . 



10. LMA Zero Potentiometer: 



-Used to zero the LMA 

 signal when starting a 

 test. Its setting is re- 

 lated to rope weight and 

 LMA gain by the LMA gain 

 chart . 



11. LMA Calibrated Offset 



12. LF Gain Potentiometer; 



-Used to shift the LMA sig- 

 nal by a fixed amount dur- 

 ing testing, (affects 

 chart recorder feed only) . 



■Sets the internal gain of 

 the electronic control 

 section for the LF channel 



■setting depends on rope 

 size, construction and 

 condition . 



13. LF Zero Potentiometer: 



-Used only in the 'static' 

 mode of testing to zero 

 the LF trace . 



14. Compression Band Switch 



15. LF Meter 



16. Static /Dynamic Switch 



17. Measured Length Counter 



A-17 



-used to 'compress ' lower 

 amplitude noise on the LF 

 trace 



-this function is available 

 on record only. 



-Used for zero adjustment 

 of the LF trace and as an 

 indicator of LF signal. 



-Tests can be run in 

 'Dynamic ' mode when rope 

 speeds are above 100 ft/ 

 min (.35m/sec); below 

 this speed 'static' set- 

 ting should be used. 



-Shows distance from 

 starting point of the 

 test. 



