Hach-Lange ISENa38103 - Manual (Page 4)

Calibration procedure:
1. Connect the
probe to the
meter. Make sure
that the cable
locking nut is
securely
connected to the
meter. Turn the
meter on. 2. In three
separate beakers
or appropriate
containers,
prepare 10,
100 and
1000 mg/L Na
+
standard solution
or use appropriate
standards that are
above and below
your application
range as the
standard set.
3. Add the
contents of one
Sodium ionic
strength
adjustment (ISA)
powder pillow per
25 mL to each
standard. 4. Push
Calibrate. The
display shows the
current standard
value that is to be
read from the
standard solution
set. 5. Rinse the
probe with ISA
rinse solution
(refer to
Prepare
the ISA rinse
solution
on page 11).
Never use
deionized water..
Blot dry with a lint-
free cloth. Do not
touch the tip of the
probe.
6. Add a stir bar
and put the probe
in the first
standard solution
in the set. Make
sure that the
reference
junctions are fully
immersed in the
solution. Do not
put the probe on
the bottom or
sides of the
container. Shake
the probe from
side to side in the
sample to refresh
the reference
junction. 7. Put the beaker
on an
electromagnetic
stirrer and stir at a
moderate rate.
Check for air
bubbles and
remove them if
necessary. 8. Push Read.
The display will
highlight the
standard value
and proceed to
the next standard
value. The display
will show
"Stabilizing" and a
progress bar as
the reading
stabilizes. The
display shows the
standard value
when the reading
is stable. 9. Repeat steps
5-8 for the other
Na
+ ) standard
solutions in the
set.
10. Push Done to
view the
calibration
summary. The
display will not
show Done until
the minimum
number of
calibration points
have been
collected.
4