HP Landscape Lighting 410C User's Manual | Page 43
TM 11-6625-1614-15
b . U s e a c v o l t m e t e r t o v e r i f y M o d e l 4 1 0 C l i n e
f. Observe counter, and adjust A3R5 for a chop-
v o l t a g e o f 1 1 5 v . C h o p p e r f r e q u e n c y w i l l v a r y w i t h
p e r f r e q u e n c y o f 1 0 0 c p s ( ± 2 c p s ) .
l i n e v o l t a g e v a r i a t i o n s .
c . C o n n e c t 4 1 0 C , e l e c t r o n i c c o u n t e r , a n d
5 - 2 9 . P o w e r S u p p l y A d j u s t m e n t
v o l t m e t e r a s a h o w n i n F i g u r e 5 - 6 . 1 .
a . R e f e r t o T a b l e 5 - 7 f o r P o w e r S u p p l y c h e c k
d . S e t M o d e l 4 1 0 C F U N C T I O N S E L E C T O R t o
p o i n t s a n d t y p i c a l v o l t a g e v a l u e s . M e a s u r e d c
+ D C V ; R A N G E t o 1 . 5 V .
v o l t a g e s b e t w e e n c o m m o n a n d d e s i g n a t e d l o c a t i o n
o n A l .
e . A d j u s t v o l t m e t e r c a l i b r a t o r t o s u p p l y + 5 V d c
b . S e t M o d e l 4 1 0 C F U N C T I O N t o A C V . S h o r t
t o t h e M o d e l 4 1 0 C ( D C V a n d C O M c a b l e s ) .
A C V a n d C O M c a b l e .
Table 5-7, Power Supply Test
voltage
Location on A7
Tolerance
+ 175 v
Wht/blk and Orange
± 3 0 V
+ 3 8 V
Junction of CR6 and R4
±8.0 V
+ 6 V
Cathode of CR8
±0.6 V
–9.1
V
Anode of CR7
+ 1 . 8 V
c . M e a s u r e + 1 7 5 v o l t a c r i p p l e w i t h a c v o l t m e t e r
( H - P M o d e l 3 4 0 0 A ) . R M S v a l u e o f r i p p l e s h o u l d n o t
e x c e e d 2 . 5 m v .
5 - 3 0 . D C Z e r o A d j u s t m e n t a n d B i a s
a . S e t M o d e l 4 1 0 C F u n c t i o n S e l e c t o r t o + D C V
a n d R a n g e S w i t c h t o . 5 V .
b . S h o r t D C V C a b l e t o C O M C a b l e .
c . A d j u s t A 3 R 2 1 f u l l y c o u n t e r c l o c k w i s e , a n d
t h e n r o t a t e a b o u t 2 0 ° c l o c k w i s e .
d . A d j u s t Z E R O A D J p o t o n r e a r p a n e l f o r z e r o
m e t e r d e f l e c t i o n . S w i t c h t o – D C V . I f a n y d e f l e c t i o n
i s o b s e r v e d , a d j u s t Z E R O A D J p o t t o r e t u r n m e t e r
p o i n t e r h a l f w a y b a c k t o z e r o . C h e c k z e r o s e t t i n g o n
a l l r a n g e s f o r b o t h + D C V a n d – D C V . Z e r o o f f s e t
should not exceed 1070 in any case.
5 - 3 1 . D C A m p l i f i e r O u t p u t A d j u s t
a. S e t t h e M o d e l 4 1 0 C F U N C T I O N S E L E C T O R
t o A C V ; R A N G E t o 5 V .
b. C o n n e c t a D C V o l t m e t e r ( H - P M o d e l 3 4 4 0 A /
3 4 4 2 A ) t o t h e d c a m p l i f i e r O U T P U T o n t h e M o d e l
4 1 0 C r e a r p a n e l . S e t d c v o l t m e t e r R A N G E t o 1 0 v .
c. C o n n e c t M o d e l 4 1 0 C A C P r o b e t o v o l t m e t e r
c a l i b r a t o r o u t p u t . A d j u s t v o l t m e t e r c a l i b r a t o r t o p r o -
vide a 5 v, 400 cps signal.
d . M o d e l 4 1 0 C s h o u l d r e a d f u l l s c a l e ( 5 v ) . T h e
dc voltmeter should indicate 1.5 V. If it does not, ad-
j u s t A 6 R 2 0 f o r 1 . 5 v r e a d i n g .
5 - 3 2 . F u l l S c a l e D C A d j u s t m e n t
a. S e t M o d e l 4 1 0 C . F U N C T I O N S E L E C T O R t o
+ D C V ; R A N G E t o . 0 1 5 V .
C h a n g e 1
5-9/(5-10 Blank)
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