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Appendix Service Information
Constant Voltage (CV) Verifications
Constant Voltage (CV) Verifications
Constant Voltage Test Setup
I f m o r e t h a n o n e m e t e r o r i f a m e t e r a n d a n o s c i l l o s c o p e a r e u s e d , c o n n e c t
e a c h t o t h e ( + ) a n d ( - ) t e r m i n a l s b y a s e p a r a t e p a i r o f l e a d s t o a v o i d m u t u a l
c o u p l i n g e f f e c t s . U s e c o a x i a l c a b l e o r s h i e l d e d 2 - w i r e c a b l e t o a v o i d n o i s e
p i c k - u p o n t h e t e s t l e a d s .
Table A-3 Verification Programming Values
Low voltage
Model
range
E3646A
8V/3A
E3648A
8V/5A
Voltage Programming and Readback Accuracy
T h i s t e s t v e r i f i e s t h a t t h e v o l t a g e p r o g r a m m i n g a n d G P I B o r R S - 2 3 2 r e a d b a c k
f u n c t i o n s a r e w i t h i n s p e c i f i c a t i o n s . N o t e t h a t t h e r e a d b a c k v a l u e s o v e r t h e
r e m o t e i n t e r f a c e s h o u l d b e i d e n t i c a l t o t h o s e d i s p l a y e d o n t h e f r o n t p a n e l .
Y o u s h o u l d p r o g r a m t h e p o w e r s u p p l y o v e r t h e r e m o t e i n t e r f a c e f o r t h i s t e s t
t o a v o i d r o u n d o f f e r r o r s .
1 T u r n o f f t h e p o w e r s u p p l y a n d c o n n e c t a d i g i t a l v o l t m e t e r b e t w e e n t h e ( + ) a n d
( - ) t e r m i n a l s o f t h e o u t p u t t o b e t e s t e d a s s h o w n i n F i g u r e A - 1 .
2 T u r n o n t h e p o w e r s u p p l y . S e l e c t t h e o u t p u t t o b e t e s t e d a n d t h e h i g h v o l t a g e
†
r a n g e ( 2 0 V / 1 . 5 A )
a n d t h e n e n a b l e t h e o u t p u t b y s e n d i n g t h e c o m m a n d s :
INST:SEL {OUT1|OUT2}
VOLT:RANG P20V
OUTP ON
3 P r o g r a m t h e o u t p u t v o l t a g e t o 0 v o l t a n d c u r r e n t t o f u l l s c a l e r a t e d v a l u e
†
( 1 . 5 A )
b y s e n d i n g t h e c o m m a n d s :
VOLT 0
CURR 1.5
( E 3 6 4 6 A m o d e l )
4 R e c o r d t h e o u t p u t v o l t a g e r e a d i n g o n t h e d i g i t a l v o l t m e t e r ( D V M ) . T h e r e a d i n g
s h o u l d b e w i t h i n t h e l i m i t o f ( 0 V ± 1 0 m V ) f o r o u t p u t 1 o r ( 0 V ± 2 5 m V ) f o r
o u t p u t 2 . A l s o , n o t e t h a t t h e
For E3646A model, and see
†
High voltage
Model
range
20V/1.5A
E3647A
20V/2.5A
E3649A
( E 3 6 4 6 A m o d e l )
CV
Adrs
Limit
Rmt
,
,
, a n d
for other models.
T a b l e A - 3
Low voltage
High voltage
range
range
35V/0.8A
60V/0.5A
35V/1.4A
60V/0.8A
a n n u n c i a t o r s a r e o n .
179
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