Hach-Lange ISENH418103 User Manual - Manual (Page 3)

• The calibration is recorded in the electrode and the data log. The calibration is also
sent to a PC, printer or flash memory stick if connected.
• Air bubbles under the sensor tip when submerged can cause slow response or error
in measurement. If bubbles are present, gently shake the probe until bubbles are
removed.
• If a calibration error occurs, refer to Troubleshooting on page 10.
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
Ammonium
standard solutions
(minimum 25 mL
volume). 3. Add the
contents of one
Ammonium ionic
strength
adjustment (ISA)
liquid 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
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. Do not
put the probe on
the bottom or
sides of the
container. 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
Ammonium
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.
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