KSV Sigma 70 - Page 8

The
knob
on
the
right
is
for
coarse
taring
.
As
it
is
adjusted
the needle
of
the
analogue
meter
will
move
to
indicate
the
changes
in
the active
measuring
range
.
In
practice
these
controls
are
used
as
follows
.
Select
the
probe
you
wish
to
use
and
hang
it
on
the balance
hook
.
Heavy
probes
:
If
the
meter
has
gone
off
scale
you
can
use
the
coarse
taring
knob
to
try
to
bring
the
needle back
within
the active
range
.
If
this is
not
possible
you may
attach
a
counterbalance
of
equal
weight
to
the
rear
hook
and
repeat
procedure
.
Light
probes
:
Change
the
setting
of
the
range
until
you
have
found
the
most
sensitive
range
at
which the
balance remains
within the active
range
after
taring
.
If
you
are
close
to
the limits
of
the active
range
it
may
be
wise
to
select
a
less
sensitive
range
because the
additional
force
when the
probe
contacts
the
liquid
may
cause
the
forces
to
go
out
of
active
range
.
Lifting
System
The
_
stage
of
your
Sigma
70
is lifted
by
a
DC
motor
to
ensure
vibration
-
free
movement
.
The
DC
motor
is
servo
controlled and
speed
is
detected
by
an
optical
encoder
.
Speeds
range
from
0.1
to
40
mm
/
min in
increments
of
0.1
mm
/
min
.
The maximum
range
of
movement
is
75
mm
.
There is
a
safety
switch which
may
be
set to
prevent
the
upward
movement
of
your
stage
driving
the
probe
into the bottom
of
your
vessel
.
The
safety
switch
is inside
the bottom
housing
of
your
measuring
unit
as
shown below
.
WV
)
Safety
rod
:
o
o
_
screw
Upper
safety
snitch
To
adjust
the
safety
switch
please
do
as
follows
:
8