HP 435B - Section VIII Service; 8-2. Safety Considerations; 8-5. Troubleshooting

M
o d e l 435 Β

Se
rvi ce
8-1
.

I N T R OD U CTIO N

F o r co n t inu e d pr otect i o n aga
inst f ir e
Se rvi ce
inf o rm at i o n i s provid e d in t hi s sect
i o n .

h aza rd , r ep l ace t h e lin ef
u
seo
nly w i t h α
Ge n e r a
l
se
rvi ceinfo rm at i o n r e l ates to tr o ubl es
h oot-

250V fu se of t hesa m e c urr e n
t r
at
in g a nd
in g . R e pa
ir inf o rm at i o n r e l ates to pe rf o rm a
n
ce

t y pe (fo
r ex a m p l e, s l ow blow,
t im e d e l a y ,
test in g a nd a
d j u st m e n ts a f te r r e p a ir s a r e ma
d
e .

etc .) . D o n ot use r epa ir e d f u ses o
r s h o r t
Each se rvi ce
s h eet in c lud es prin c ipl esofop e rat
i
o
n ,

c ir c ui te d f u se h o ld e rs .
and tr oubl es
h oot ing inf o rm at i o n, α co mp o n e
n t

W he n e ve r i t i s lik e ly t hat t hi s pr
otect i o n
l ocat i o n di ag
r
a
m a nd α sc h e m at i c di ag r a m .

has bee nimpa ir e d, t h ein st
rum
e
n t mu st
be m ad e in ope r at iv e a nd be
sec ur e d
Th e l ast f o
ld ou t in t he ma nua l s hows t h e
l ocat i o n

aga
in st a ny unin te nd e d ope
r at i o n .
o f eac h
asse mbly , c h ass i s mo un te d co
mp o n e n t
dad j u sta
bl e co mp o n e n t .

T h e se r v i ce in fo rm at
i
o
n i s ofte n use d
an
w i t h powe r s u pp li e
d a nd p r otect iv e
co v e rs re m o v e d f r o m
t h e in st rum e n t .
8-2 .

SA FETY CO N SID ER
ATIO N S

En e r g y ava il ab l e at m a
nypo in tsmay, i f
co n tacte d , r es ul t in p e
r so na l in j ury .
Al t h o ugh t hi s in st
rum e n t has bee n d es i g n e d in
acco rda n ce wi t h in te
rn
at
i o n a l sa fet y sta nd a rd s,
t hi s ma nua l co n tain s
inf o rm at i o n, cau t i o n s a nd

8-3
.

S ERV IC ES HEE TS
w a rnin gs whi c h mu st
be f o ll o w e d to av o id p e r-

E ac h se rvi ce s h eet no rm a lly in c
lud es prin c ipl es o f
so n al in j ury a nd da
m
age
to t h e in st rum e n t (see

op e r at i o nand tr o ubl es h oot in g
info rm at i o n, α co m -
Sect i o n s II, III, a nd V) .
Se rvi ce a nd ad j u st m e n ts

po n e n t l ocat i o n di ag r a m and α
sc h e m at i c, all of
s h ould be pe rf o
rm e d o nly by qu a li fie d se rvi ce

whi c h a pply to α s pec i
fic
po
r t i o n o f c ir c ui t ry
p erso nn e l .

w i t hin t h e in st rum e n t .
W
A RN I NGS
A ny in te rruptio
n
of
t h e pr otect iv e
(g r o undin g) co ndu
cto r (in s id e o r ou ts id e
t h e in st rum e n
t)
o
r di sco nn ect i o n of t h e
p r otect i ve ea r
t
h
te rmin
a
l i s lik e ly to
m ak e t h e in st
rum e n t d a n ge r o u s . In ten-
t i o na l in te rru pt
i o n i s p r o hi b i te d .
SE CTIO N V III
S ERV IC E
Se rvi ce Sh eet 1 in clud es an
ove rvi e w o f t h e in st ru-
m e n t o p e r at i o n , t ro
ubl
es
h oot in g onan asse mbly
o r stage l e v e l a ndα t
r oubl es h oot ing bl ock di a-
g r a m . Th e bl oc k di ag r a m a
l soservesas an " index"
f o r t h e ot h er se rvi ce s h eets .
Th e Sc h e m at i c Diag r a m
N otes, Fi g ur e 8-5, a id in
in te rpr et ing t h e sc h e m at
i
cs
.
M a in te
n
a
n
ce
d esc ri be d he r e in i s pe r -

8-4 .

P rinciples of Operation
fo rm e
d w i t h powe r su pp li ed to t h e in st ru-

Th e o p er at i o n o
f t h e c ir c ui t ry s h o wn by t h e sc
h e-
m e n
t
a
nd w i t h t h e pr otect iv e cov e rs

mat i c di ag r a
m i
s
e xpl a in e d in t h e Prin c ipl es
o f
r e m ov
e d . S uc h m a in te n a n ce s h ould be

O p e
r at i o n . Thi s
inf o rm at i o n i s ou t lin e dby u s
in g
pe
r fo rm e d o nly b y se rvi ce-t r a ine dpe
r -

asse mblyand
stage na m es . Th ese na m es a
l so
so nn e
l w h o a r e awa r e of t h e h aza rd s

se p ar ate c ir c
ui
t
ar eas on t h e sc h e m at i c di ag
r
a
m s .
involved
(fo r exa m p l e, f ir e and e l ect ri ca l
s hoc
k
) . W
h e r e m a in te na nce ca n be pe r -
fo rm e d
w i t hou t powe r s up p li e d, t h e

8-5 . Troubleshooting
powe r s
h ould be re m ove d .

Thi s inf o rm at i o n
i s in t h e f o rm o f hin ts a nd s u g-
gest i o n s pe r ta
inin g to pro bl e m s o n e ma y e n co un
Capac i to
rs in s id e t h e in st rum e n t m ay

te r w hil e tr oubl es
h ootin g t h e Po w e r M ete r . Th e
st ill
be c h a r ge d ev e n i f t he in st rum e
n t

tr oubl es h oot
in g inf o rm at i o n i s l ocated on t h e
l eft-
h
as
bee n di sco nn ecte d f r o m i ts sourceof

hand f o ld ou
t o f t h e se rvi ce s h eet f o ll o
win g t h e
s up p
ly .

P r inc ipl es o
f
O p
e r at i o n .