fftffiflTr'i:t
+l'J'i"::1"3'"91#0.":::g:^to,]^9inL-?7
(see
diagram)
and
the
brack
probe
f,,1,';,l.,ii;.rtl"'J"T1Tr,J"iJ.l*"_:g:;,.:',lil.'.1:,t''ii;;,.'ffi,i,i'";li?
ill,.l',,3,,$i,,f'?ll
button
reteased
to
500
o'aoproriiirt.ry-
*iii:
ti;";rii;;'ir;,:lllr,'_3l.rJl3[,,i*',?nr.'JLJJri
ll.^,j..:Ert
shourd
move
fidm
zero
riitn
-irre-"nutton-ieieaseu
to
7000
f) witfi rhe
.hrr*nn
ll:,i."':.',1"
should
mort-
iid'i,-.iiii'
riitri"ii."';,iil;"?.[:11?'ff'
fdoJ'd
the
button
depressed.
PARAGRAPII
8)
A)
checking
0f
the
D.c.
vorts
circuit:
.the
continuity
of
the
vorts
circuit
can
iasiry
be
carried
out
by
setting
the
reference
test
Meter
oii'O'[i6OOi
ii,.n
inserting
the
btack
irobe
in
the
(-)
socket,
and
the
red one
in_the
itiO
,i,f
$.]tJ,
,tfii,_
rnstrument
under
test
exceeds
the
end
of
scate
and
the
reference
T;;i
M;ie;';urli?li'z'rjoo
o.
tt
may
seem
obyious
ro use
the
range
Ox
100
instead
ot
Ox
iooti,-uui'li-iJirg
iirt,
the
instrument
under
test
woutd
be
overroaded
causrns
the
pr,itiiitior-iio,i.s"i.';;;."into
pray.
This
wouh
reduce
the
resrstance
to
the
pores
of,the
Garvanometeiano
iie'iotar
viru,i'.r'iii,
ibii"rri"Ilng.
ny
modifving
the
varue
of 2000
o
wlictr'woulJ
*t
r.'ouiu,naore
0n
the
ox
r00
range
of
the
Reference
Test
Meter.
Move
-t-he
i.u
piorii-o'iii
iir"l'i
,rngu.
The
needre
wiil
io
to
the
36th
division
(brack
scare).
tt.
,or"iir-i'i
#''*,,i"io'il
pnge wi,
bring
the
need.ie
to
the
12th
division
approximateiv,,-on
tt,.
-sri
v'ri'rgu"'ir'ir,i
3rd_division
approximatery;
on
the
200
V
range,
to
3
to
4 oiJir'0,,1.:i-,91,re
SOO"V'riigu'io
3/t0ths
of
a
bivision
anit
on
tne
range
1000,
to
3/20ths
of
a
otvrslon.
rn
the
event
of
an
interruotion
in
the
chain
of
resistors.
the
needre
wi[
not
m've
when
the
probe
is
inserted
in
rhe
s6ckei
r;tali;e-i;
ih;'f;;ii;';;;s..
Range
on
which
the
interruptlon
shows
up
Resistors
to
be
replaced
100
mV
zv
7?o
a
10
v
-99
Ko
so
v
lqg
K.,
200
v
800
KCI
5oo
v
9
Msr
looo
v
Q
No
48
,
10MQ
^)
l;rults
in the
A.C. v0ltmeter
circuit: lf the
Test Meter does
not work on the voltmeter
r,rrl'r:
in A.C., this may be caused
by
interruption or alteration
of the additional
serially
r11(,rl
resistors which are
the same as
those composing
the D.C, volimeier circuit.
You
are
.r lvr'.r:rl
to
check the
circuit as
per
the
instructions relative
to the faults in
the D.C. Volts
,r,,ut
in
paragraph
8).
Regarding the
testing of
the rectifying section, see
the instructions
r,
vlrr
in
paragraph
7) except
for 2 V
A.C., the instructions
for which are
as {ollows:
',1
ll)0
reference
Test tilleter on
Ox1000,
insert
the black
plug
in the socket
pF
2
V, and
the
r,',1
t)lug
in the range 2 V
250 pA, the needle
must reach
the 25th division on
the black scale.
irr
rrv0rsing
the
probes,
the needle
must indicate approximately
the space
of one division to
llrr'l0ft
of
the
zero.
ll rl
(loes
not, check the Gerntanium
diode as
follows: set
the reference
Test
Meter 0n
r r
x 100.
With
the
red
probe
on
point
17, and the
black
probe
on
point
16
(see
diagram),
rl,,
rcading will be
approximately
1500
O.
After reversing
the
probes
the reading
will be
rl,lrroximatily
500
O;
Repeat
the operation
f0r the second
Germanium
diode.
With the
red
lr,lre
on
point
ZS and the
black
probe
on
point
24, the
reading should
be 1500
[)
and,
,rllr,r
reversing
the
pr0bes,500
O
approximately.
r
lr,rr
k the
seition
of the
range d0ubling switch
relative
to the
2 V A.C.
and ihe relative
,l
0{l{),
as f0l!ows:
',,,1
llre
reference
Test Meter as follows:
red
probe
0n
point
5,
black
probe
0n
pcint
4
(see
,l
rliram). The needle of
the reference
Test Meter
must indicate
zer0' Press the
button
.,rrrl
lhc reading moves
to 2200
O
approximately.
lnvert
the
probes
and repeat
the operation.
1t,,
rcading will
be respectively
zero
and 500
Q
apprcximately.
!!tr.il
the
if{iciency
of
the di6des
has been established,
check
the other
resistors 5800
(-)
rrrl
/20
O.
tL,
ncasure the first resistor,
set
the reference
Test Meter
on the
range
Ox
100. lnseri
It.
bl;rck
probe
in the
pF
2 V
A.C.
socket.
Touch
point
5
with the
red
probe.
The
reading
rrrLr,,l
correspond
to 5800
O.
To measure
the
1045
O
resistor,
keep the.
-refelence
Test
Iv{r,lrrr
set oh
Ox100,
and
touch
point
15 with
the black
probe
and
point
18 with the
red
4o
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