HP 435B Service Manual

M o d e l 435 Β
5-1 . I N T R OD U CTIO
N
Thi s sect i o nd escrib es t
h
e a
d
j u st m e
n ts w hi c h will
r et urn t h e P o w er M ete r to p ea
k o p
e
r at in g co ndi-
t i o na f te r re p a ir s ar e co mpl ete
d
.
If t
h
e a
d
j u st m e
n
ts a
r
e to
b
e
co n
s
id
e
r
e
d v
a
lid, t h
e
P owe r M ete r mu st h av e α h a lf h o ur w a rmup
a nd
t h e lin e v o l tage mu st
b
e wi t
hin
+5 to
-10% ο o f
n o min a l .
Th e a
d j
u st
m
e
n
t pr
oce dur e e n t i t l e d "P o w er
M ete
r Ad j u st m e n ts w i t h 50 ΩP o w e r Se n so r" i s to
b
e pe rf
o rm
e
d only w h e n t h e HP M o d e l 11683 Α
R a
n
ge Ca
libr ato r i
s
n ot
a
v
a
il a bl e .
5-2 . SA FE
TY
CO
N SID ER ATIO N
S
Al
t
h o ugh t hi s in st rum e n t h as b ee n d es i g n e d in
acco
rd
a
n ce wi t h in te rn at i o na l saf et y sta nd a rd s,
t hi s m a nu a l co n ta in s inf o rm at i o n, ca u t i o n s a nd
wa rnin gs whi c h mu st be f o ll owe d to a v o id p e r-
so n a l in j ury a nd d a m age to t h e in st rum e n t (see
Sect i o n s II a nd III) . Se rvi ce a nd ad j u st m e n ts
s h o uld b e pe rf o rm e d only by qualified se rvi ce p er -
so nn e l .
SE
CTIO N V
AD JU ST
MEN
TS
f u ses and t h e s h o r t-c ir c ui t in g of f
u
se-
h o ld e rs mu si . be a vo id e d .
5-3 . E Q U I PMEN
T
RE Q U I RED
Ad j u st m e n ts
W h e n e ve r i t i s lik e ly t h at t h e p
r
otect i o
n
offe r e d b y f uses has bee nimpa ir e d, t h e
in st rum e n t mu st be m a d e in ope r at iv e
a nd be secu r e daga inst a ny unin te nd e d
ope r at i o n .
A d j u st m e n ts desc ri be d he
r
e in a
r
e p e
r-
fo rm e d w i t h powe
r
s
u pp
li e d to
t h
e
in-
st rum e n t
w hil
e p
r otect iv e cov e r s a r e
removed .
En e r g y ava il ab l e at m any
po in ts m a y, i f co n
tacte
d ,
r
es
ul t in p e r-
so na l in j ury .
Th e test e qu i pm e n t re quir e d f o r t h e ad j u st m e
n
t
pr oce dur es i s li ste d in T a bl e 1-2, R eco mm e nd e d
T est Equipm e n t . Th e cr i t i ca l specifications of
s ub st i t u te test in st rum e n ts mu st m eet o
r
e
x
cee
d
t h e sta nd ard s l iste d in t h e ta bl e if t
h
e P o
w
e
r M
ete
r
i s to m eet t h e sta nd a rd s set
f ort h in T a bl e 1-1,
S p ec i f i cat i o n s .
5-4 . F ACTO
R Y
S
ELE
CT
E D
CO
MPO NEN TS
W A RN I N GS
A ny in te rru pt i o n of =e pr otect iv e

F
acto ry se l ecte d co
mp
o
n
e
n ts
a
r e indi cate d on t h e
(g r o undin g)co ndu cto r (in s id eo r o u ts id e

sche m at i ca nd re pl acea
bl
ep
arts li st wi t h
an
aste r -
t h e in st rum e n t) o r di sco nn ect i o n of t h e

ί s k (*) imm e di ate ly f o ll ow
in g
t
h
e
r
e
f
e
r
e
n
ce
d es i g-
p r otect iv e ea r t h te rmin a l i s lik e ly to

n ato r . Th e n o min a l v a lu e o
f
t h e co mp o
n
e
n t i s
m ak e t h e inst rum e n t dange rous . I n te n -

li ste d . T a bl e 5-1
li
sts t
h
e pa
r ts by r
e
f
e
r
e
n ce d es i g-
t i o n a l in te rru pt i o n i s p r o hi b i te d .

n
ato
r
a
nd pr
o
vid es
an
e xpl a n at i o n of h o w t h e
co
mp
o n e n t
i
s se
l
ecte
d , t h e n o rm a l v a lu e r a n ge
A nyad ju st m e n t, m ai n te n an ce and r e-

a
nd
α
r
e
f
e
r
e
n ce to t h e a ppro pri ate se rvi ce s h eet .
pa ir of t h e ope n e d in st rum e n t und e
r

Th e
Manual C
han ges s uppl e m e n t will upd ate a ny
vo l tage s ho uld be avo id e d as
mu c h as

c han ges to f acto ry se l ecte d co mp o n e n t
poss i b l eand, w h e n in e vi tab l e, s ho
uldbe

i
nf o rm at i o n .
ca rri e d o u t only b yα s kill e dpe
r
son
w h
o
i s awa r e of t h e haza rd involved .

5-5 .

AD JU ST MEN T L OCATIO N S
Capac i to rs ins id e t h e in st rum e n t m ay

All
t h e
a
d j u st m e n ts fo r t h e P o w e r M ete r are con-
still be c h a r ge d ev e n i f t h e in st rum en t

ta
in
e
d
on
t h e Α 4 asse mbly e x ce p t t h e fr o n t pan e l
has bee n di sco nn ecte d f r o m i ts sour ce of

C AL ADJ co n tr o l a nd PO WER REF O UTPUT
s u p ply .

l e v e l co n tr o l . Th e l ast f o l do u t in t hi s m a nu a l con-
tains
α ta bl e whi c h c r oss- re fe re n ces all pi ctor i a l
M ake sure t h at o nly f u ses w i t h t h e

a nd sc h e m at i c l ocat i o n s of t h e ad j u st m e n t co n -
r equir e d
r
ate d c
urr
e
n t
a nd of
t h e spec i -

t ro l s . Th e acco mp anyin g fi g ure s h ows t h e 1 οεα -
f i e d t y pe (s
l ow b l ow, t im
e de
l
a y ,
etc .) a r e

t i o n s of t h e ad j u sta bl e co n tr o l s, asse mbli es a nd
use d fo
r r ep l ace m e n t . Th e u seof repa ir e d

c h ass i s- m o un te d p a r ts .

HP 435B Specifications

General

Brand	HP
Model	435B
Category	Measuring Instruments
Language	English