Unclassified 



SECURITY CLASSIFICA 



IS PAGE (When DetB Fntered) 



REPORT DOCUMENTATION PAGE 



REPORT NUM 



TN-1639 



2 GOVT ACCESSION 



DN987077 



TEST AND EVALUATION OF THE 

 jTM 



MAGNOGRAPH"" UNIT 

 WIRE ROPE TESTER 



A NONDESTRUCTIVE 



7. AUTHORfs; 



L. D. Underbakke and H. H. Haynes 



9. PERFORMING ORGANI Z>i 



^E AND ADDRESS 



NAVAL CIVIL ENGINEERING LABORATORY 

 Port Hueneme, California 93043 



CONTROLLING OFFICE NAME AND ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, Virginia 22332 



MONITORING AGENCY NAME ft ADDRESSfi/ diller, 



WHO 



-DOeUMENT 



3 RECIPIENT'S CA 



tOtLECTlON 



= e OF REPOP 



PERIOD COVERED 



Not final; Sep 1980- Sep 1981 



^IG ORG. REP 



63725N; 

 Y0995-01-004-621 



12 REPORT DATE 



July 1982 



«1BER OF PA-^ES 



85 



Unclassified 



16. DISTRIBUTION STATEMENT (ol this Re, 



Approved for public release; distribution unlimited. 



17 DISTRIBUTION 



<EY WORDS fConfinue on i 



Wire rope, steel cable, inspection, nondestructive test, nondestructive evaluation, 

 electromagnetism, Hall effect sensors. 



The nondestructive wire rope test device, a unitized AC/DC Magnograph, was tested 

 for operational characteristics prior to acquisition by Naval field activities and start of 

 inspection programs. The Magnograph was tested for loss of metallic area (LMA) and local 

 fault (LF) detection accuracy. Wire ropes 1/2, 3/4, 1-1/8, 1-1/2, 2, and 2-1/2 inches in 

 diameter were tested on a wire rope test track to find the accuracy of the unit. Two mining 

 wire ropes, guy wires of a 1 ,000-f t-tall tower, and wire rope for 400-, 250-, and 30-ton 

 cranes were used to determine operational characteristics of the Magnograph. 



DD 1 JAN 73 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



Unclassified 



SECURITY CLASSIFICATION OF Th 



AGE (Wien Da 



WIBL/WHOI., 



D D3D1 QD40eHl 



