S T A B I L I T; R E M O T E V O L T A G E S E N S I N G C O N N E C T I O N - Agilent Technologies E3633A Operating Manual

Chapter 3 Front-Panel Operation
Remote Voltage Sensing at the Front and Rear Terminals
Stability
U s i n g r e m o t e s e n s i n g u n d e r c e r t a i n c o m b i n a t i o n s o f l o a d l e a d l e n g t h s a n d
l a r g e l o a d c a p a c i t a n c e s m a y c a u s e y o u r a p p l i c a t i o n t o f o r m a f i l t e r , w h i c h
b e c o m e s p a r t o f t h e v o l t a g e f e e d b a c k l o o p . T h e e x t r a p h a s e s h i f t c r e a t e d b y
t h i s f i l t e r c a n d e g r a d e t h e p o w e r s u p p l y ' s s t a b i l i t y , r e s u l t i n g i n p o o r t r a n s i e n t
r e s p o n s e o r l o o p i n s t a b i l i t y . I n s e v e r e c a s e s , i t m a y c a u s e o s c i l l a t i o n s . T o
m i n i m i z e t h i s p o s s i b i l i t y , k e e p t h e l o a d l e a d s a s s h o r t a s p o s s i b l e a n d t w i s t
t h e m t o g e t h e r . A s t h e s e n s e l e a d s a r e p a r t o f t h e p o w e r s u p p l y ' s p r o g r a m m i n g
f e e d b a c k l o o p , a c c i d e n t a l o p e n - c o n n e c t i o n s o f s e n s e o r l o a d l e a d s d u r i n g
r e m o t e s e n s i n g o p e r a t i o n h a v e v a r i o u s u n w a n t e d e f f e c t s . P r o v i d e s e c u r e a n d
p e r m a n e n t c o n n e c t i o n s .
Remote Voltage Sensing Connections
C o n n e c t i o n s b e t w e e n t h e p o w e r s u p p l y s e n s i n g a n d o u t p u t t e r m i n a l s s h o u l d
b e r e m o v e d , a n d u s i n g s h i e l d e d t w o - w i r e c a b l e , t h e p o w e r s u p p l y s e n s i n g
t e r m i n a l s s h o u l d b e c o n n e c t e d t o t h e l o a d a s s h o w n i n F i g u r e 3 - 2 .
t h e s h i e l d a s o n e o f t h e s e n s i n g c o n d u c t o r s a n d t h e o t h e r e n d s h o u l d b e l e f t
u n c o n n e c t e d
⊥
( ) o n l y . O p e n i n g a s e n s i n g l e a d c a u s e s t h e p o w e r s u p p l y o u t p u t v o l t a g e t o
d e c r e a s e a t t h e l o a d l e a d s . O b s e r v e p o l a r i t y w h e n c o n n e c t i n g t h e s e n s i n g l e a d s
t o t h e l o a d .
F o r l o c a l v o l t a g e s e n s i n g c o n n e c t i o n s , t h e ( + ) a n d ( - ) s e n s e t e r m i n a l s m u s t b e
c o n n e c t e d t o t h e ( + ) a n d ( - ) o u t p u t t e r m i n a l s r e s p e c t i v e l y .
N o t e When you make the remote voltage sensing connections at the front or rear panel
terminals, make sure to disconnect all the connections to the load and sense leads
at the other end terminals. Do not make the sensing connections at both front and
rear terminals at the same time. It will cause to damage the power supply seriously.
N o t e During remote sensing setup, it is strongly recommended to power off (by presssing
power ON/OFF button) the power supply to avoid undesirable damage to the load
or the power supply.
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. C o n n e c t o n e e n d o f t h e s e n s i n g l e a d s h i e l d t o t h e c h a s s i s g r o u n d
D o n o t u s e