Thermo Electron Ramsey ORETRONIC III, Operating And Service Manual

Page: 76 / 143

ORET RONIC
™
Tramp Metal Detector
R E C 4 1 0 5 4 - 8
I f t h e n o i se l ev e l i n cre a s e s w h en t h e co n v ey o r i s r u n e mp t y an d me c h a n i c a l
v ib r a ti o n s d o n o t ap p e a r to b e th e p ro b l e m, t h e p ro b l em ma y b e el e c t r i c al
n o i s e fr o m t h e c o n v ey o r mo to r o r e l e c t r i c a l w i r i n g f r o m t h e mo t o r .
WARNING
High voltage that may be present on leads could cause
electrical shock.
All switches must be OFF when checking input AC electrical
connections, removing or inserting printed circuit boards, or
attaching voltmeters to the system.
Use extreme caution when testing in, on, or around the elec-
tronics cabinet, PC boards, or modules. There are voltages
in excess of 115 V or 230 V in these areas.
7 . C h e c k sy ste m w i r i n g a n d i n s t al l a t i o n t o b e c e r t a i n i t c o n f o r m s t o t h e
r e c o m me n d e d d i st a n c es s p e c i f i ed i n t h e w i rin g d i ag r a m f o r y o u r
sy s t e m o r t h e
F i e l d Wi r i n g D i a g r a m
( D 0 7 3 2 8 C - E 2 0 1 ) .
I f y o u f i n d a p ro b l e m w i t h t h e wir i n g , co r r ec t i t .
CAUTION
The coil wiring must be run in a separate
conduit from any power wiring.
I f th e sy st em a p p e a r s t o b e in s t all e d a n d wi re d co r r e ct ly an d th e r e
i s s t i l l a h i g h l e v e l o f n o i s e w h e n t h e c o n v e y o r i s r u n , o th e r
e l e c t r i c al sy s t e ms ma y b e g en e r a t i n g t h e n o i s e.
8 . W i th t h e co n v ey o r ru n n i n g e mp t y , tu rn o f f o th e r sy st ems n e a r th e
T M D
o n e a t a ti m e wh i l e o b s e rv in g th e b a r g r ap h .
T u r n i n g o f f t h e so u r ce o f t h e el ec t r i c a l n o i se w i l l c au se t h e n u mb e r
o f L E D s l it to d ecrease, id en t ify in g t h a t sy st e m a s t h e o n e c a u si n g t h e
p ro b l e m.
9 . I f y o u id e n t i fy a d ef in i t e so u r c e o f t h e e l e ct r i c a l n o i s e, c o r r e c t t h e
p ro b l e m.
A ty pi cal so lu ti on may b e re-ro u t i n g w i r i n g c a r r y i n g l a r g e c u r r e n t s .
I n so me i n s t a n c e s , t h e o n l y p r a ct i c a l s o l u t i o n ma y b e r e l o c at i n g t h e
T M D t o s o me o t h e r l es s n o i sy l o c a t i o n .
I f y o u c a n n o t i d e n t i f y a d e f i n i t e s o u r c e o f t h e e l e c t r i c a l n o i s e, i t m ay
b e h e lp fu l t o c h an g e th e o p er a t in g fr e q u en cy o f th e TM D .
1 0 . S c r o l l to t h e
OP FREQ
d i sp l ay a n d c h an g e th e o p er a ti n g f r e q u en cy
v a lu e fr o m 0 to o n e o f th e o th e r v a lu e s (0 = 9 0 0 H z , 1 = 7 8 0 H z , 2 =
6 6 0 H z , 3 = 1 0 2 0 H z ) .