C O N S T A N T C U R R E N T ( C C ) V E R I F I C A T I O N; C O N S T A N T C U R R E N T T E S T S E T U; C U R R E N T P R O G R A M M I N G A N D R E A D B A C K A C C U R A C - Agilent Technologies E3646A/47A User Manual

E364xa series. dual output dc power supplies
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Appendix Service Information
Constant Current (CC) Verifications
Constant Current (CC) Verifications
Constant Current Test Setup
F o l l o w t h e g e n e r a l s e t u p i n s t r u c t i o n s i n t h e G e n e r a l M e a s u r e m e n t T e c h n i q u e s ‚
o n p a g e 1 7 8 , a n d t h e s p e c i f i c i n s t r u c t i o n s w i l l b e g i v e n i n t h e f o l l o w i n g
p a r a g r a p h s .
Current 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 c u r r e n t 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 . T h e
a c c u r a c y o f t h e c u r r e n t m o n i t o r i n g r e s i s t o r m u s t b e 0 . 0 1 % o r b e t t e r .
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 0 . 0 1
( R
) a c r o s s t h e o u t p u t t o b e t e s t e d a n d a d i g i t a l v o l t m e t e r a c r o s s t h e c u r r e n t
M 1
m o n i t o r i n g r e s i s t o r ( R
M 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 l o w v o l t a g e
r a n g e ( 8 V / 3 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 P8V
( E 3 6 4 6 A m o d e l )
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 f u l l s c a l e r a t e d v o l t a g e ( 8 . 0 V )
c u r r e n t t o z e r o a m p s b y s e n d i n g t h e c o m m a n d s :
VOLT 8
( E 3 6 4 6 A m o d e l )
CURR 0
4 D i v i d e t h e v o l t a g e d r o p ( D V M r e a d i n g ) a c r o s s t h e c u r r e n t m o n i t o r i n g r e s i s t o r
( R
) b y i t s r e s i s t a n c e t o c o n v e r t t o a m p s a n d r e c o r d t h i s v a l u e ( I
M
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 A ± 1 0 m A ) . A l s o , n o t e t h a t t h e
Rmt
a n d
a n n u n c i a t o r s a r e o n .
5 R e a d b a c k t h e o u t p u t c u r r e n t o v e r t h e r e m o t e i n t e r f a c e b y s e n d i n g t h e
c o m m a n d :
MEAS:CURR?
For E3646A model, and see
Ω
c u r r e n t m o n i t o r i n g r e s i s t o r
) a s s h o w n i n F i g u r e A - 1 .
for other models
T a b l e A - 3
a n d o u t p u t
) . T h i s v a l u e
O
CC
Adrs
Limit
,
,
,
185

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E3648a/49a2110-10682110-10702110-04572110-0996

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