I.C.E Supertester 680 R - AC Resistance Measurements (100 K Ohms to 100 Megohms); Reactance Detector Functionality

Simplif!ed
ohmmetric.
circuit
for low values.
MEASUREMENTS
(lF
RESISTANCE
It{ ALIERNATING
CURRENT
,
(trom
100 K
ohms
to
100 megohms)
To measure
very
high resistances
introduce
any
mains
supply
with_
a.
voltage
between
125
and
250 V
A.C.'intithe
etedriC
soctret
located
on the
lefi
tiand of
the
instrument;
for
-the
malnJ suppty
ule the
appiopriate
cable
that
acco.mpanies
the instrument'
Having
done
this,
^
irinit'i-iiot
marked "tiEG.;;fully
to the
left and
iniroduce
test
lead as
far as
it
will
go
into a
f
,o*., central socket
marreo
jF,
io'nJo.no
the other
lead
in the
right
hand
upper socket
rnarked
Qlrrfiooo**
connect
the
plugs
together
and
once
more
turn
the
knob
marked
,,nEG.,,
(maiis"control)
until
the
instrument
pointer
has
moved
to the
bottom
of
the scale
oppi'iit.''O-ot'ri.
firiatty
the
iesistance
to Le
measured
is inserted
between
the
plucs
a-n-d
ii
'sioufO
be
remembered'ttrii
tne ieadings
taken on
the scale
must
be multiplied
by
10'000.
REACTANCE
DETEGTOR
ln normal
pratice
it is
often
necessary
to
find
out
if there
is
any
reactance
in
a circuit.
For
instance,
establish
if a
capacitor
in
paratlel
with a
resistance
is
in working
order
without
t
having
to remove
it from
the circuit.
To d0
this
it is
only
necessary
to
measure
the resistivity
value
of
the
circuit
on
the
otrii
fOOb range,
first
using
itie analyser
circuit
fed
by the..batteu
incorPorated
and then
iepiating
the
m6a!uremeni
o"n
it'. sani.
range feeding
lnto
the
circuit- alternating,
current
ii;;a
tri;
miins
wtrich
is
connecteo
to the sicket
on the
left hand
side
of
the
instrument
i,iitr,r-..
,ofG.-.r
iiom
rZS to
250
Volt
-
50
Hz as
described
in the
previous
chapter.
lf
there
is any
difference
in the
two
readings,
i.e.
that taken
using.the.
battery
and that
i.sJftin!
tiom
itre
mains, lnis
shows
clearly
the
presence
of
reactance
in
the circuit'
25
0iagram
how
to meas[-
re low
resistances
with
the
Supertester
680
R.
24
Lillv s)
LOWA
ooooo