Hach-Lange ISENH318103 User Manual User Manual
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Calibration notes:
•
Stir the standards and samples at a slow and steady rate to prevent the formation of
a vortex.
•
Additional standard sets along with the minimum number of calibration points can be
selected on the Calibration Options menu.
•
Push Skip to omit a standard from the calibration routine. The display will not show
Skip until the minimum number of standards is met.
•
Begin with the lowest concentration during calibration. This reduces carry-over
contamination to give the best results.
•
Note the temperatures of the standards during calibration. Keep temperatures
between calibration standards within ±2 ºC for optimal results.
•
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
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 Ammonia
standard solutions
(minimum 25 mL
volume).
3. Add the
contents of one
Ammonia 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
deionized water.
Blot dry with a lint-
free cloth. Do not
touch the tip of the
probe.
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