I.C.E Supertester 680 R - DC Resistance Measurements (Tenths of Ohm)

R'l+
R2= 1600rL
0,96"4_a
0,576a
5,76Q
s7,6a
57612
Simplified
0hmme.
tric 0C
CircIit.
O.C. RESISTANCE
MEASUREMEI{TS
Ft,R VERY
t()W RESISTANCES
(Tenths
of
()hm
ts 30 0hms)
0n our SUPERTESTER
680
R, very
low resistances,
e.g.
tenths of
0hm, can
be read
to a
good
accuracy.
To be able
to carry
out very
low 0hms measurements
proceed
as follows:
first'
with a
bridge
supplied with the
iit,
short-circuit
the
two sockets
f)
and
Ox1;
Then.
with.
the rheostat
set
the'needle
on the
erid of
the scale and
nreasure
the
low resistance
through
the two
probes
which
nrust be
inserted
in the sockets
marked:
LOW
O.
I
SJx10
S) r
100
Sl
r 1C00
ln
ihe model 680
R the
reading can
be
made directly
in the
scale on
the black
arch
located
imr.aiateti
above
the
dB scaie.
Where
a
very a.ccurate
reading
is required,
then
the very
iow resistance
of the
probe
wire should
be tak6n
intg account
iy
shuniing
the.probes.before
insertins the
resistance
under
examination.
The
probe
resistance
should
be subtracted
from thi total
reading
obtained
after
measuring
the
resistance
under examination.
As it is shown
in
the scale,
the
0 Ohm does
not
correspond
to
the
absolute
zero
of
the
instiuruni
beiause
also
the
very
low resistance
of the
tester internal
circuit
has been
taken
into acccunt
for a
higher accuracy.
+
Diagram
showing
how
to
measurs
resistaIces
wlth
the
Supertester
680
R.