Thermo Electron Ramsey ORETRONIC III, Operating And Service Manual

Page: 81 / 143

ORET RONIC
™
Tramp Metal Detector
R E C 4 1 0 5 4 - 1 3
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
electronics cabinet, PC boards, or modules. There are
voltages in excess of 115 V or 230 V in these areas.
3 . I f
CLIP
i s n o t d i sp l ay e d , d i s c o n n e c t t h e cl i p d et e c t o r wi r e s at t h e
c o n t r o l u n i t .
4 . U s i n g a DV M , me a s u r e t h e v o l t a ge a t T B 2 , t er mi n a l s “ 7 ” an d “8 . ”
5 . T h e v o l t a g e s h o u l d b e a p p ro x i ma t e ly 2 4 V DC .
6 . I f v o l t ag e is p r e s en t, th e cl ip d e te c t o r i s d efe c t i v e an d n e e d s to b e
r e p l a c ed .
I f v o l t ag e is n o t p r e s en t, th e T MD ma y h av e b e en d a ma g e d b y a cl i p
d e t e c to r w ir i n g p ro b l em. B o th the c l i p d e t ec t o r a n d t h e C P U b o a r d
s h o u ld b e re p l a c ed .
I f y o u h av e d et e r mi n ed t h at t h e cl i p d e t e c to r i s fu n ct io n a l b u t s ti ll n o t
w o r k i n g p r o p er l y , i t i s n ot s e e i n g t h e c l i p s o n t h e b e l t . T h i s ma y b e b e c a u s e
t h e cl ip d etect o r i s to o far fro m t h e cl ip an d i s ou t of th e d e t e ct ion rang e o r
b e c a u s e t h e c l i p i s t o o s ma l l t o d e t e c t .
N o t e : T h e c l ip d e t e cto r i s t o b e mo u n t ed 3 t o 4 in c h e s a w ay f ro m th e fi r s t id l e r
t o ward th e t a i l pu ll ey an d th e co il su p p o r t s t r u c t u r e. I f i t i s n o t
mo u n t ed a cc o rd in g to t h e in s t a ll at i o n p l a c eme n t d r a win g s, t h e c lip
d e t e c to r may i n t e r mi t t e n tly mi s s c l ip s .
1 . I f th e c l ip d e t e c to r i s o u t o f d et ec t i o n r an g e, r e ad ju s t th e cl ip
d e t e c t o r . ( R e f e r t o t h e a p p r o p r i at e
I n s t a l l a t i o n P l a c e me n t d r a wi n g fo r
y o u r sy st em. )
2 . I f th e c l ip i s to o s ma l l , ad d an ad d i ti o n a l cl i p o n th e si d e o f th e b e l t.
M a r k t h e se c t i o n o f t h e b e l t wh e r e t h e f a l se t r i p o c cu r s a n d i n s p e c t
t h i s s e c t i o n o f t h e b el t wh en i t i s s t o p p ed .
I f t h e c l i p d e t e c t o r i s f u n c t i o n a l a n d i s d et ec t i n g a l l t h e c l i p s ,
CLIP
sh o w s
o n th e d i spl ay , an d the T M D i s fal se trip pi ng on th e cl ip s, th e p rob l e m i s t oo
h i g h a cl i p s e n s i t i v i t y .