4 matrix 2 correction (2 point matrix correction), Matrix 2 correction (2 point matrix correction), Operation – Hach-Lange NISE sc User Manual
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Operation
All three values form one of the two correction points.
4.
Look for two correction points where the laboratory values are at least half a decade
apart and display typical operating conditions for the installation.
5.
Go to the sensor menu and select
CALIBRATE > MATRIX
CORR
>
VALUE
CORR.
2
then
confirm with
ENTER
.
6.
Select the parameter
1
(NH
4
–N or NO
3
–N) that requires correction.
Note: When using the AN-ISE sc probe, you can only correct one parameter at a time. If both
parameters need to be corrected, the procedure must be performed again.
7.
Enter the three values for the first correction point and confirm with
ENTRY
COMPLETE
.
Note: The example opposite shows the NH
4
-N and K correction of the AN-ISE sc probe.
8.
To activate the correction, enter the three values for the second correction point and
confirm with
ENTRY COMPLETE
.
Correction result
CORR-RESULT
is shown.
Note: If a correction does not produce a successful result, calculations are made with the previous
correction. After successful completion of value correction, the corrected value is shown as the
display value for ammonium or nitrate the next time the menu is opened.
4.6.4.4 MATRIX 2 correction (2 point matrix correction)
Proceed as follows to perform MATRIX 2:
1.
Select
SENSOR MENU > AN-ISE SC
or
AISE SC
or
NISE SC > CALIBRATE > FURTHER
CORR.
.
2.
Select
MATRIX 2
from the selection window and press
ENTER
.
3.
Select the parameters
1
requiring a two-point matrix correction.
4.
Select the point to be corrected.
5.
SELECT MEAS CONC 1
or
MEAS CONC 2
6.
Take a water sample from the closest point possible to the sensor. Filter this sample
promptly and perform an immediate laboratory analysis of the selected parameters.
The measurement value can change very quickly:
When the laboratory value has been determined, proceed as follows:
7.
Select
SENSOR MENU > AN-ISE SC
or
AISE SC
or
NISE SC > CALIBRATE > FURTHER
CORR. > MATRIX2
8.
Select the parameters to be corrected with the laboratory value entry:
9.
Enter the laboratory reference value and confirm.
The
MATRIX2 CORR.
is activated when the entry is confirmed for both points.
VALUE POINT 1
AN–ISE SC NH4–N
AN–ISE SC K
LAB NH4–N
ENTRY COMPLETE
VALUE POINT 2
AN–ISE SC NH4–N
AN–ISE SC K
LAB NH4–N
ENTRY COMPLETE
AMMONIUM
CONC MEAS1
DATE
CONC. LABVALUE.1
MEAS CONC 2
DATE
CONC. LABVALUE 2
1
Applies to AN-ISE sc