Philips PM2517E Service Manual page 80

Automatic digital multimeter
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76
r_
r
[_,
i
t
r
L
t
t
c
t
t
t
t
t
t
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t
t
t .
r:
rl
[ '
f '
R a n g e d 6 v i ä t e s
R205. F206, F207
and R208
R 2 0 5 = 9 k 0 9
R 2 0 6 = 1 M
R 2 0 7 = 1 0 0 Q p o l m e t e r
R208 = 820k
R e l e r t o B
C h e c k ; F 2 0 5 , R 2 0 6
R 2 0 7 a n d R 2 0 8
B
C h e c k ; S e e c l o r s w i t c h
( c r e a n l )
R e l e r l o C
c
B
R o n V 2 0 l
R a n g e 1 0 0 V
H i = V 2 0 1 d r a i n
Q - m e l e r
<600
D e l e c t v 2 0 i
6.4.4. V:.- ranges not linear
N o .
F r o m
M e a s u r e m e n t M e a s u r i n g p o i n t s
M e a s u r i n g d a t a
Correct
l n c o r r e c l
C h e c k l i n e a r i t y o f
A D C . R e l e r t o 6 . 2 7
R e l e r t o B
B
L r n e a r r l y o l V : :
r a n g e
D s p l a y
S e l e c r : 9 9 9 9 m V
I n s u a t e s e l e c l o r s w r l c h
p a ( V : -
l / 2 w i t h a
p r e c e o r r n s u r a l r n g
m a t e r a l , s h r l l e d u n d e r
t h e s r d i n q c o n t a c t
C h e c k r f t h e V : -
r a n g e s l r n e a r
R e l e r t o C
D e f e c t 0 0 6 4
C
B
G a l e o l V 2 0 1
H r = i 2 0 1 g a t e .
S e l e c l : R a n o e
9 9 9 . 9 m v =
L o g i c 0 { , 8 . 5 v )
D e l e c t V 2 0 l
o r R e i e r t o 6 5
F A N G I N G
6 . 5 . R A N G I N G
6 . 5 . 1 . N o m a n u a l r a n g i n g
N o . From
M e a s u r e m e n t
N y ' e a s u r i n g
p o i n t s
l v l e a s u f l n g d a t a
C o r r e c t
I n c o r r e c t
A u t o r a n g r R g s r g n a l
( A U T ) O O 0 0 5 S ( D 1 0 1 )
H i = 0 1 0 1 / 4
|
L o q i c 0 ( - 8 . 5 v )
R e t e r t o E
R e i e r t o I
B
a n o d e v o l t a g e V 1 5 0
H i = V 1 5 0 a n o d e
L o g c 0 ( - 8 . 5 V )
F e f e r t o C
c
B
K a l h o d e v o l t a g e V t 5 0
H i = V l 5 0 k a l h o d e
L o g i c 0 ( - 8 . 5 V )
F e { e r l o D
C h e c k
s w i t c h A L j T O
D
c
A n o d e v o l t a g e V 1 5 0
H r = V ] 5 0 a n o d e
C o n n e c l l h e k a t h o d e o 1
V 1 5 0 v r a a t 0 0 k a
r e s s t o r l o t h e
0 ' s o c k e l
L o q i c 0 ( 8 5 V )
C h e c I R 7 2 2 T r a c h s
D e f e c t V 1 5 0
E
S i q n a l U P / D O W N
o 0 0 0 5 9 ( D 1 0 1 )
H r = D l 0 1 / 9 D O W N
H l = D l 0 1 i 1 0 U P
D e p r e s s s w i l c h U P
D 1 0 1 / 1 0 = L o g i c l
R e l e a s e s w i t c h L i P
D 1 0 1 / 1 0 = L o g i c 0
D e p r e s s s w r t c h O O W N
D 1 0 l / 9 = L o g i c 1
R e l e a s e s w i t c h D O W N
D 1 0 1 / 9 : L o g r c 0
L o g i c 0 = - 8 . 5 V
L o g r c 1 = 0 V
R e l e r t o F , c
T r a c k I n l e r r u p t o n
C h e c k s w r l c h e s
U P D O W N
E
S r g n a l R N G A
o 0 0 0 5 9 ( D 1 0 1 )
H i = 0 1 0 1 / 8
L o = O - s o c k e t +
Se ect fanges in lunclion
V : : w i l h M A N s w i t c h
L o q c 0 o r l
R a n g e L o g c
l V
0
1 0 v
0
1 0 0 v
l
r 0 0 0 v
1
A D C c a n n o l b e
a d j u s l e d
R e l e r r o 6 . 4 . 2 .
D e l e c t O 0 0 0 5 9

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