Thermo Electron Ramsey ORETRONIC III, Руководство по эксплуатации и обслуживанию

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ORET RONIC
™
Tramp Metal Detector
R E C 4 1 0 5 1 - 2
F i g u r e 1 -1 : M a g n et ic F i el d s
G e n e r a t e d b y t h e T M D
RECEIVER
COIL
TRANSMITTER
COIL
PRIMARY
MAGNETIC
FIELD
TRAMP
METAL
SECONDARY
MAGNETIC
FIELD
T h e ma t e r ia l o n th e co n v ey o r b el t al s o p r o d u c e s a s e co n d a ry ma g n et i c f i eld .
T h e t wo ma g n et i c f i eld s c an b e d i s t in g u i s h ed fr o m e a ch o th e r b y o b s er v i n g
t h e i r d e c ay t i me s . T h e b et t e r t h e c on d u ct i v i t y c h a r a ct er i s t i c s o f t h e
ma t e r i a l , t h e l o n g e r t h e d e c ay t i me . A s t h e ma g n e t i c f i e l d d e c ay s, t h e
o u t p u t s i g n a l s t r e n g t h d e c r e a s e s ( s e e
F i g u r e 1 - 2 ) .
F i g u r e 1 -2 : Ho w Co n d u c ti v i ty
A f f e c t s D ec a y T i m e
Sign
al S
tr
e
n
g
th
Time
A 9 0 2 2 4
Poor Condition Material
Good Condition Material
A 0 0 2 0 6