341350A-en-US_V1.3 8/15
6
Conductivity
(TDS
&
Salt)
Calibration
Conductivity
accuracy
verification
should
be
performed
on
a
periodic
basis;
once
per
month
is
the
recommended
cycle
for
normal
use.
If
calibration
is
required,
a
conductivity
standard
solution
must
be
obtained.
The
meter
can
be
calibrated
in
any
or
all
of
the
three
ranges.
Standardizing
solutions
of
84µS/cm,
1413µS/cm
or
12.88mS/cm
(12,880µS/cm)
are
used
for
the
automatic
calibration
recognition
procedure.
No
other
calibration
values
are
permitted.
Calibration
is
always
done
in
conductivity
mode.
Since
salinity
and
TDS
values
are
calculated
from
conductivity
values,
this
procedure
also
calibrates
the
Salinity
and
TDS
ranges.
1.
Fill
a
sample
cup
with
the
standardizing
solution.
2.
Turn
the
meter
ON
and
insert
the
electrode
into
the
solution.
Tap
or
move
the
electrode
in
the
sample
to
dislodge
any
air
bubbles.
3.
Press
and
hold
the
MODE/CAL
button
(approximately
2
seconds)
until
the
main
display
starts
flashing.
4.
The
meter
will
automatically
recognize
and
calibrate
to
the
standardizing
solution.
At
the
end
of
the
calibration,
the
display
will
briefly
indicate
“SA”,
“End”
and
then
return
to
the
measurement
mode.
Note:
The
“SA”
will
not
appear
if
the
calibration
fails.
5.
The
“range
calibrated”
alert
will
appear
in
the
display
for
each
range
that
is
calibrated
during
that
power
on
cycle.
Low
range,
84µS/cm
Medium
range,
1413µS/cm
High
range,
12.88mS/cm
(12,880µS/cm)
Note:
The
meter
allows
for
a
1,
2
or
3
point
calibration.
If
calibration
is
done
for
more
than
one
point,
the
lowest
value
standard
should
be
done
first
to
obtain
the
best
accuracy.
Temperature
(pH
and
Conductivity)
Offset
Calibration
This
procedure
allows
for
error
correction
of
the
external
temperature
probe
(pH)
or
the
conductivity
probe’s
built
‐
in
temperature
sensor.
1.
Switch
to
pH
or
Conductivity
(Salt/TDS)
mode.
2.
Place
the
temperature
probe
or
conductivity
cell
in
the
sample
and
allow
the
temperature
reading
to
stabilize.
3.
Press
and
hold
the
UNIT/SET
button
until
the
ºC
or
ºF
icon
begins
flashing.
4.
Adjust
the
▼
or
▲
buttons
to
set
the
display
to
indicate
the
known
temperature
of
the
sample.
5.
Momentarily
press
the
UNIT/SET
button
to
save
the
change
and
return
to
the
measurement
mode.
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