Table of Contents
Advertisement
M
odel 435 Β
Se rvi ce
8-1 .
I NTRODU CTION
F
or co ntinu e d pr otect io n aga inst fir e
Service information is provided in this sect ion.
h
aza rd,
r
epl ace t h e line f u se o nly
w
i t h α
Genera l se rviceinform ation relates to troubl es hoot-
250Vfuse of t he sa me curr en t
r
at ing and
ing.
R
epa ir informat ion re lates to performa n ce
type (fo r example, slow blow, tim e d el ay ,
testing and a djustm ents after r epairs are ma d e.
etc.) .
D
o
n
ot use
r
epaired
f
uses o r
s
ho r t
Each servi ce sheet inc ludes principles ofoperat i o n ,
circuited
f
useh old e rs.
and
t
roubles hooting information, α comp on e n t
Whene v er i t
i
s lik ely
t
hat t hi spr otecti on
l
ocation diag r a m and α sc hematic diag ram.
h
as been impaired, t he inst rum e nt mu st
be
m
ad e inope rative a nd be secured
The
l
ast
f
o ldout in
t
he manual s hows the
l
ocation
aga inst a ny uninte nded ope ratio n.
of each assembly, ch assis mounte d co mponen t
d adjusta ble compo ne nt.
The se rvi ce info rm at i o n is ofte n u sed
an
w
i t h powe r
s
upp lie d a nd protect iv e
co v e rs
r
emo v ed
f
ro m
t
he inst rum ent .
8-2 .
SAFETY CON SIDER ATIO NS
En ergy ava il ab le at m a nypointsmay,
i
f
co ntacted,
r
es ult in pe rso nal in
j
ury.
Although
t
his inst rum ent has been design ed in
accordance with inte rn at ional safet y sta ndards,
this manual contain s information, cau tion s and
8-3 .
S ERV ICE
S
HEETS
w
arnings which mu st be
f
ollo we d to avoid pe r-
E
ach se rvi ce s heet norm ally inc ludes princ ipl es o f
sonal injury and da m age to the instrum ent (see
o pe ration and
t
r o ubl eshoot in g info rm ati on, α com-
Sections II, III, and V) . Se rvice and adjustmen ts
pone nt
l
ocat io n diagram and α sch em ati c, all of
should be perfo rme d only by qu alifie d service
which apply to α s peci fic po rtio n o f cir c uit ry
personnel.
wi t hin
t
h e instrum e nt .
W
ARN I NGS
A ny in terruptio n of the pr otectiv e
(grounding) condu cto r (inside or ou tside
the instrum en t) o r disconn ect ion of the
protect ive ear t h termin a l is likely to
m
ake the inst rum en t dangero us. Inten-
tional interrupt ion i s p rohibite d.
S E
CTIO
N V
III
S
ERV
IC
E
Service Sheet 1 in clud es an o vervi ew
o
f
t
he instru-
m ent oper ation, tro ubl es hoot ing on an asse mbly
o r stage
l
eve l and α
t
ro ubl esh ooting bl oc k di a-
gram. Th e block diagr a m a l so serves as an " index"
f
o r
t
he ot her servi ce s heets .
Th e Sche mati c Diagram Notes, Figure 8-5, aid in
interpretin g the schemat i cs .
Mainte n a n ce d esc ri bed her ein i s pe r-
8-4 .
P
rinciples of Operation
forme d
w
ithpower
s
upp lied to the in stru-
Th e oper atio n o f
t
he cir c uitry s hown by
t
h e sc he-
men t a nd
w
ith
t
he protect ive covers
matic diag ra m i s expl a ine d in
t
he Prin ciples o f
remov ed. Such maintenan ce should be
O
pe r ati o n. Thi s inform ati on i s ou tlin ed by u s in g
pe rformed
o
nly
b
y service-trained pe r-
asse mbly and stage nam es. Th ese na mes a l so
sonne l
w
ho are awa re of th e
h
aza rds
sep arate circ ui t areas on t he sc hem atic diag r a ms .
involved (fo r exa mple, fir e and e lectri cal
s
hoc k ). W here mainte nance ca n be per-
formed
w
ithou t power
s
upplied, the
8-5 .
Troubleshooting
power
s
hould be
r
emoved.
Thi s inform at ion i s in
t
he
f
orm
o
f hin ts and su g-
gesti ons perta ining to pr oble ms one may encoun
Capacito rs inside th e inst rum en t
m
ay
ter w hil e tr oubles hooting t h e
P
ow e r Meter . Th e
still be charged even if the inst rum e nt
t
r oubles hoot in g inform ati on i s
l
ocate d on the
l
eft-
h as been disconnecte d
f
rom its source of
hand fo ldo u t of
t
he servi ce sheet
f
o ll o wing t h e
s
upp ly.
P
rincipl es o f
O
p er ati on .
Advertisement
Table of Contents
