Marconi TF 933C User Manual

(i)
Unscrew
the
clamp.
Withdraw
the
test
cell.
Take
out
the
plunger,
(2) See
that
the
insulat
ing
ring
is well
seated
on
the
electrode with
its
open
end
upua
rds. Tn
handling the
electrode,
hold
by the
edges.
Do not
handle
the
upper
surface as
this
may
deposit
moisture
on the
insulating
surface between
the two
electrode
rings.
(3) (a)
For
whole
gra ins
put
enough
into
the test cell
to form
a single
layer.
(b)
For
ground
samples half
fill
the
test cell
with
meal.
After
the test
the
compressed
plug
should
be about
1.6
mm
(or 3.2
mm
for
the larger
test
cell).
Ensure
that the
sample
is
lying
uniformly
in
the bottom
of
the test
cell;
a
gentle
shake
will
ensure
this
in
most cases.
(4)
Insert
the
plunger
and
hold
it
down
(to
prevent
the
sample
slipping
to
one side)
then slide
the
complete
test
cell
into the
clamp.
(5)
Screw
the
clamp
down
until
the
two
parts
of
the
cylindrical
spring
housing,
nummt.ed
on
the
end
of the
screw,
become
flush.
CAUTION
The
spring
is
compressed
solid
by
about a
half
turn
of
the
screw
beyond
standard
thrust
at
which
tests
are
made.
The
solid
point
can
easily
be
felt on
the
tommy-bar.
DO NOT
ATTEMPT
to
tighten
beyond
this
point
as
it
is
possible
for
a
strong
operator
to
strain
the
clamp.
Fig.
2.1
Compression
cell
electrode
assembly
Take
electrode
(A)
Add
ring
(B)
Jlalf
fill
the
cavity
then
add
plunger
(C)
Screw
the
assembly
down
in
the
clamp
until
flush
at
(D)
(A)
(B)
(C)
10

Marconi TF 933C Specifications

General

Brand	Marconi
Model	TF 933C
Category	Measuring Instruments
Language	English