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 4 - 6
F o r a si n g l e c o i l
T M D
:
•
Loosen the plastic bolts that hold the coil to the
frame.
•
Move the coil from side to side. The slots in the coil
will limit the coil travel.
•
As the coil is moved, th e bar graph display will
change. Find the position where the minimum
number of LEDs in the middle of the bar graph are
lit.
•
If the balance improves significantly, proceed with
S t ep 8
to “fine tune” the coil balance.
•
Retighten the plastic bolts holding the coil to the
frame.
•
If adjusting the coil does not affect the bar graph
significantly, adjust it to the best position possible
and go on to
4 . 4 . 2 F i n d i n g t h e S o u r c e o f Me c h a n i c a l o r
E l e c t r i ca l N o i s e
8 . S c r o l l to t h e
COARSE
d i s p l ay an d s e t t h e v a l u e t o
5
.
T h i s i n c r e as e s t h e s en s i t iv i t y o f t h e T M D so y o u c an f i n e - t u n e t h e c o i l
b a l an c e .
9 . S c r o l l to t h e
COIL BAL
d i s p l ay a n d o b s e rv e t h e b ar g r ap h a g ain .
T h e b a r g r a p h ma y b e “ n o i si e r ” t h a n i t w a s i n S t e p 6 (th e r e may be
mo r e L E D s l i t ) . T h i s i s b e c a u s e t h e s e n si t i v i t y i s s e t h i g h er .
1 0 . R e p e a t S t ep s 7 an d 8 , i n c r e a s i n g t h e co a r s e s e n si t i v i t y v al u e e a c h
t i me .
1 1 . W h en y o u a r e s a t i sf i ed wi t h t h e c o i l b a l an ce , s c r o l l t o t h e
COARSE
d i sp l ay an d r e t u r n t h e v a l u e t o t h e “ a s f o u n d ” v al u e y o u r e co r d ed i n
S t ep 5 .
4.4.2 Finding the Source of Mechanical or Electrical Noise
F a l s e t r i p p i n g o f t e n o c c u r s f r o m me c h a n i c a l v i b r a t i o n s t h a t p r o d u c e b a ck -
g r o u n d n o i s e . T h e T M D s o f t w ar e h a s s i g n a l p r o c e s si n g t o r e c o g n i z e t h e
d i f f e r e n c e b e t w e e n a s i g n a l f r o m m e t a l p a s s i n g t h r o u g h t h e c o i l s a n d a s i g n a l
f r o m me t a l v i b r a t in g in t h e r eg io n o f th e co i l s . Ho w ev e r , s ev e r e me t a l
v i b r a t i o n s c a n so me t i me s p r o d u ce t h e s a me s i g n a l a s t h e me t a l p a s s i n g
t h ro u g h th e c o i l s .
E l e c t ri c a l d i s tu rb an ce s f ro m t h e c o n v ey o r b e l t mo t o r o r th e w ir in g f ro m t h e
mo t o r may a l s o p r o d u c e n o i s e t h a t i n t er f e r es w i t h T M D o p e r a t i o n s . E v en
o t h e r el e c t r i c a l sy st ems n e a r t h e T M D ma y b e g en e r a t i n g t h e n o i s e.