VOLTA&E
MEASIJREMENIS
ff(}LTS) IN AI.TERNATINO
CURRENI
(4O()O
ohms/Volt)
To carry
out alternating current
v0ltage measurements
introduce as far
as it will
go
one
of
the
leads
into the low
socket marked in red
"-"
(A.C.)
and the other
lead into one
of
the
sockets also marked in red
"10
V-";
"50
Y
-"i
"25A
V-";
"1000
V-";
"2500 V-,,;
according to the most
suitable range required,
When
a
high
tension circuit has
t0 be
measured
(range
up
to 2500
Volt)
0perate with
great
care because
there
is
the danger 0l an
electrical discharge
and make
sure therefcre not
to
touch or even
get
too close to
the live circuit. Therefore
only connect
the Ieads to
the
circuit to be measured
when this is
not
live.
Then, after having
made sure
that the Tester,
the ieads
and
plugs
are in a stable
position
and correctiy
set for the
particular
nleasurement,
that is on
an
insulated
table, far
fr0m any
part
0f the body
and
any
conductor
of electricity,
the current may be
switched on
t0 the circuit and the reading
taken without
however
touching the
plugs
or
the tester.
When
there is any doubt
ab0ut the voltage to
be measured,
alv,iays
plug
into the highest
range so as to
avoid
possible
overl0ads to
the resislance.
lf
necessary,
after the first
reading, the terminal of
the various ranges
can be inserted int0
the next lowest
range
so
that
a
more
accurate reading
may be obtained.
To measure
within the 2 V A.C.
rating, the
first
Iead
is introduced into
the Iower
socket
nF
-
9tl
marked
Ori
loirio
while the
second socket to be used is
the sarne used
for the 5c pA
{
and
100 mV
ranges.
ln
0rder t0
get
an accurate
reading of the
scale
rvith
referenc0 t0 the range
and therefore
to
the selecied socket,
take into account the data
of the table 0f the
following
page.
For the ranges
4-20-100-500 and 2000
Volts
A.C.
use the
sockets of the ranges 2-10-50-250
and
1000
Volts respectively,
pressing
the sensitivity
button
(AVx2)
which doubles the
ranges
taken into
considerati0n, to make
this
point
cleare, we report
in the following the
table to
be
taken into account for
the c0rrect reading of
the scale v'rith reference
t0
the range
and
therefore to the selected socket.
10
*
For these two
last ranges, due t0 the
high
voltage
which is very
dangerous for
the cperator,
carry out
the measurement without touching directly
either the
plugs
or the analyser;
therefore
switching
ihe current on the circuit only after
having connected
the
analyser
with the circuit
to
be tested! All
possible
danger of short circuit
through the
body will be
consequently
p
revented.
The sca!e sector t0 be
read
for
a!l A.C. measurements
(-)
is the first
red sector
locaied
below the
mirror.
11
Numbering
to be read
on the scale
from 0 to 10
from 0
to 200
from 0 to 200
from
0 to 20C
from 0 to 50
from
0
to
10
{i'om 0 to 250
from 0 to 50
{rom 0 to
10
from 0
to 200
from 0 to
250
Multiply
the read-
ing
by
:
x 10
*lo
x 100
x 10
x10
: 100
:50
:10
Selected
I
Sockets
to
range
I
be
used
2
4
10
20
50
100
25A
500
-)and2v-l
xEi[H[
(-)
and
10 v-
|
iiii.niis
(-)
and 50
v-
| iiiFh?iss
(-)
and
2s0 v-
|
iiipnils
(-)
and
1000 v-
I
n'ri;?:s
(-)
and
2s00 v-
I iir'ihtbs
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