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M
odel 435Β
5-1 .
I
N
T
R
OD
U
CTIO
N
This section describes t h e a d
j
ustme nts which will
return the Power Meter to pea k op e rating condi-
tion after repairs are complete d .
If
t
h e a d
j
ustme n ts a r e to b e con s id e r e d v a lid, th e
Power Meter must have α half hour warmup
a
nd
t
he line voltage must
b
e wit hin +5 to -10%ο of
nominal.
The a d
j
ust m e n t pr ocedure entitled "Power
Mete r Ad
j
ustments with 50 Ω Power Senso r" is to
b e perf orm e d only
w
hen the HP
M
odel 11683Α
Ra n ge Ca librator i s not a v a ilable.
5-2.
SA
FE
TY CO
N
SID
ER
ATIO
N
S
Al t hough this in strument has been designed in
acco rd a nce with international safety standard s,
this manual co nta ins information, cautions and
warnin gs which must
b
e
f
ollowed to avoid per-
sonal in
j
ury and damage to the instrument (see
Sect ions II and III) . Service and ad
j
ustments
should be performed only by qualified service per-
sonnel.
S
E
CTIO
N V
AD
JU
ST
MEN
TS
f
u ses and
t
he s ho rt-cir cuiting of f u se-
h old e rs mu si . be avoided.
5-3.
E
Q
U
I
PMEN
T
RE
Q
U
I
RE
D
Ad
j
u
st
m
e
n
ts
Whe ne v er it
i
s likely
t
hat t hep r otectio n
offe red by
f
uses has been impa ir e d, t he
in strument must be
m
ade in ope rativ e
and be secured against any unin tended
ope ratio n.
A d
j
ustm e nts describe d he r e in a r e
p
e r-
fo rmed
w
it h powe r
s
upp lied to t h e in-
strum ent w hil e p rotectiv e cov e rs are
removed. Energy ava ilab le at
m
any
poin ts
m
ay,
i
f con tacte d,
r
es ult in pe r-
so nal in
j
ury .
The test equipment requir ed for the ad
j
ustme n t
pr ocedures is listed in Table 1-2, Recommended
Test Equipment. The critica l specifications of
substitute test instruments must meet o r
e
x cee d
the standards listed in
t
he table ift h e Po w e r M ete r
is to meet the standard s set forth in Table 1-1,
Specif ications.
5-4.
F
ACTO
R
Y S
ELE
CT
E
D CO
MP
O
NEN
TS
W
A
RN
I
N
GS
Any interruptio n of=e protective
F actory selecte d co mp o n e nts a re indicated on the
(grounding) condu cto r (inside or
o
u tside
schematic and replacea bl e p arts list with an aster-
the instrument) or disconn ection of the
ίsk (*) immediately follow ing t h e r e f e r e n ce desig-
protective earth te rmin al is like ly to
nator. The nominal value o f the compo n e nt is
m
ake the instrum en t dangerous. In ten-
listed. Table 5-1 li sts t h e pa rts by r e f e r e nce desig-
tional interruption is prohibite d.
n ato r
a
nd pr o vides an explanation of how
t
he
co mp onent
i
s se l ecte d, the normal value range
Any ad
j
ustmen t,
m
ainte nance a nd re-
a nd α r e f e r e nce to the appropriate service sheet.
pair of the ope ne d instrum ent unde r
The Manual C hanges supplement will update any
v
oltage should be avoided as much as
ch an ges to
f
acto ry se l ecte d co mpo n ent
possible and, w hen in evitab le, s ho uld be
i
nformation.
carried
o
ut only by α
s
kill ed pe r son
w
h o
is
aware of the hazard involved.
5-5.
AD
JU
ST
MEN
T
L
OCATIO
N
S
Capacitors ins ide the instrument
m
ay
All the a d
j
ustments for
t
he Power Meter are con-
still be charged eve n if th e instrument
ta in e d on the Α4 asse mbly
e
xcept the front panel
has been disconn ected
f
rom its source of
CAL ADJ co ntrol
a
nd POWER REF OUTPUT
s
upply.
level co ntrol. The last
f
oldout in this manual con-
tains α ta ble which
c
ross-references all pictorial
M
ake sure that only
f
uses wit h
t
he
and schematic locat ions of the ad
j
ustment con-
required r ated c urr e n t and of th e spec i-
trols. The accompanying figure shows the 1οεα-
fied
t
ype (s low b low, tim e de l ay, etc.) are
tions of
t
he ad
j
ustable controls, assemblies and
used fo r replacement. The
u
se ofrepaired
c
hassis-mounted parts.
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