Value Correction - Hach NO3D sc User Manual

4.6.3.5 Value correction

Value correction offers the option of subsequently correcting a
matrix at two different concentrations.
Take several samples on various days with different concentrations
and perform an analysis of the samples in the laboratory.
Note: The concentrations should be in a concentration range of at least
half a decade.
Conc2
1. Note the two displayed nitrate and chloride values, which are
measured with the sensor at the time of the sampling.
2. Then note the measured nitrate laboratory reference value.
All 3 values are one correction point.
3. From the values recorded, select the two correction points with
nitrate concentrations as far apart as possible.
4. Select
CAL CONFIG.> CALIBRATE>VALUE CORR
and press to confirm.
ENTER
Enter the 3 noted values:
5. 1. NO3–N NO3D sc: Enter the displayed NO
1st correction point. Press
6. 1. CL- NO3D sc: Enter the displayed Cl
correction point. Press
7. 1. NO3–N lab: Enter the measured NO
reference value for the 1st correction point. Press
confirm.
8. 2. NO3–N NO3D sc: Enter the displayed NO
2nd correction point. Press
9. 2. CL- NO3D sc: Enter the displayed Cl
correction point. Press
10. 2. NO3–N lab: Enter the measured NO
reference value for the 2nd correction point. Press
confirm.
Value correction is activated and displayed as
×
Conc1 10
------------------------------ -
=
2
–N value for the
3
to confirm.
ENTER
−
value for the 1st
to confirm.
ENTER
–N laboratory
3
–N value for the
3
to confirm.
ENTER
-
value for the 2nd
to confirm.
ENTER
–N laboratory
3
MATX2
Operation
from the menu
to
ENTER
to
ENTER
.
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