Manual is available at
http://bt3000.com/Manuals/EMTP0006_347_eng.pdf
1st press and hold the yellow button on the side until " on " is displayed. THEN after 3 seconds unit calbrated and ready to scan. bar graph and audio indicates edge.
sonic tape
just press read and it will read up to 50ft
"x" button gives area and volume
" " for addiction of length
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