TLV SonicMan SO2, Instruction Manual

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3.
SonicMan
’ s Principl e o f M e a s ur eme n t
072-65251M-03 (SonicMan SO2) 21 Jun 2007
11
3
SonicMan
’ s Principl e o f Dete c t ion
1. Le a k loca t ion s g e n e ra te a w arning s ound b y
t h e ir v e r y na t ur e . Th e r e ar e m an y ca ses in t h e
f i e ld w h e r e larg e a m oun ts o f f luid ar e l e a k ing
f ro m t h e s cr ewe d or f lang e d ar e a s o f piping
join ts or f ro m ga skets .
An ul t ra s onic s ignal i s g e n e ra te d a t t h ese
ty p es o f l e a k loca t ion s . (“Ul t ra s onic” i s u se d
h e r e t o r efe r t o s ound s in high f r e qu e nc y
band s t ha t canno t b e h e ard b y t h e hu m an e ar.)
Thi s ul t ra s onic s ignal i s g e n e ra te d e v e n in t h e ca se o f v e r y sm all l e a ks , and o ffe r s a
m uch high e r chanc e o f l e a k loca t ion d ete c t ion t han do es r e l y ing on t h e s p e c t ru m o f
s ound t ha t i s audibl e t o t h e hu m an e ar.
2.
SonicMan
, w hich d ete c ts
ul t ra s onic s ignal s and conv e r ts t h em
t o audibl e s ound, em plo ys an
ul t ra s onic m icrophon e and an
e l e c t rical band pa t h f il te r t o i s ola te
and d ete c t ul t ra s onic s ignal s .
Fur t h e r m or e , t h e ul t ra s onic s ignal s
t ha t hav e b ee n d ete c te d and
conv e r te d t o audibl e s ound can t h e n
b e h e ard t hrough t h e h e adphon e .
Addi t ionall y , conc e n t ra t ing t h e
dir e c t ional abili ty o f t h e ul t ra s onic m icrophon e f acili t a tes t h e id e n t i f ica t ion o f l e a k
loca t ion s , and t h e add e d u se o f t h e la se r poin te r effe c ts a gr e a t incr e a se in t h e
eff ici e nc y o f l e a k d ete c t ion and loca t ion id e n t i f ica t ion.
3. Au t o m a t ic Calcula t ion o f E st i m a te d Le a k ag e A m oun ts
Wh e n t h e r e ading’ s di st anc e and r e l e van t in f or m a t ion abou t t h e obj e c t b e ing teste d
hav e b ee n inpu t ,
SonicMan
di s pla ys an au t o m a t ic calcula t ion o f t h e est i m a te d
l e a k ag e a m oun t , ba se d on t h e r e ading gain e d during d ete c t ion. Thi s can b e u se d a s a
rough me a s ur e o f t h e t o t al quan t i ty o f lo sses .
Th e calcula t ion o f l e a k ag e a m oun t i s m ad e po ss ibl e b y u s ing in f or m a t ion, st or e d in
SonicMan
, t ha t ha s b ee n gain e d f ro m pr e viou s labora t or y e xp e ri me n ts .
Ul t ra s onic
w av es
? ?
?
!!
123 x 45 – 67 = 5468