4
nut completely and pull out the coupling without pulling or twisting the cable of the coil. This
way, you will prevent the cable and the conductors in it from breakdown or short circuit.
T h e s e a r c h i n g c o i l i s a p p r o a c h e d t o t h e s u r f a c e o f e a r t h b y p a yi n g a t t e n t i o n t o
a v o i d p r e s e n c e o f me t a l s w i t h i n i t s r a n g e .
2 . S w i t c h o n a n d w o r k w i t h N R G 1 1 0 .
1 . T u r n t h e ―
O N / V O L U M E
‖ knob to ―
O N
‖ and adjust preferenc e volume of
s o u n d .
2 . S e t t i n g t h e ―
T H R E S H O L D
‖ - While holding the detector a few feet above
g r o u n d a n d a w a y f r o m a n y me t a l o b j e c t , s l o w l y t u r n t h e ―
T H R E S H O L D ”
k n o b
u n t i l yo u h e a r a v e r y s l i g h t a u d i o t o n e t h r o u g h t h e s p e a k e r o r h e a d p h o n e s . T h i s
i s t h e o p t i mu m s e t - p o i n t f o r t h e ―
T H R E S H O L D ”
. A l i g h t ― b u z z ‖ a d j u s t m e n t i s
r e c o m me n d e d t o i n s u r e o p t i m u m d e p t h a n d ma x i m u m p e r f o r ma n c e .
As ―
T H R E S H O L D
‖ is in low position, as low is sensitivity. Too low of a
t h r e s h o l d s e t t i n g ma y c a u s e v e r y w e a k s i g n a l s t o n o t b e h e a r d . T o o h i g h o f a
t h r e s h o l d s e t t i n g m a y c a u s e o p e r a t i n g i n s t a b i l i t y.
I n a r e a s w i t h c o m p l i c a t e s o i l c o n d i t i o n , i f t h e ―
T H R E S H O L D ”
b e c o m e s t o o
e r r a t i c o r n o i s y, t h i s n o i s y b e h a v i o r w i l l ma k e i t d i f f ic u l t t o r e c o g n i z e a t r u e
t a r g e t i n d e p t h . I n t h i s c a s e i t mi g h t b e n e c e s s a r y t o u s e t h e
S P E E D
f e a t u r e
a n d / o r r e d u c e t h e ―
T H R E S H O L D ”
c o n t r o l .
S P E E D
c o n t r o l s e t s t h e e d g e o f s o u n d , a l s o t h e t o n e o f t h e b a c k g r o u n d " h u m " .
I n H I G H p o s i t i o n o f
S P E E D ,
t h e b a c k g r o u n d " h u m" i s h i g h t o n e . I n L O W
p o s i t i o n o f
S P E E D ,
t h e b a c k g r o u n d " h u m" i s l o w t o n e . Y o u c a n c h o o s e l o w o r
h i g h t o n e b a c k g r o u n d " h u m" a c c o r d i n g t o yo u r p r e f e r e n c e s .
3. You can work in manual or in automatic ―
G R O U N D B A L A N C E
‖ regime:
-
I n ma n u a l g r o u n d b a l a n c e mo d e
:
S e a r c h f o r a n d s e l e c t a c l e a r p i e c e o f g r o u n d o r s a n d t h a t d o e s n o t c o n t a i n a n y
me t a l l i c t a r g e t s . Wi t h t h e c o i l e l e v a t e d a t l e a s t w a i s t h i g h a n d a w a y f r o m a n y
me t a l l i c t a r g e t , s l o w l y a d j u s t t h e
T H R E S H O L D
c o n t r o l u n t i l a v e r y f a i n t a u d i o
t h r e s h o l d s i g n a l i s h e a r d .
