Hach-Lange NISE sc - Manual (Page 28)

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Operation
4.6.4 Performing the matrix correction
Note: Take laboratory value measurements or reference values promptly or, alternatively, take these
from the stabilized sample. This will prevent changes in sample concentration, as time is a factor in
comparative tests.
Refer to 7.3 Validation accessories, Page 39 for recommended laboratory measurement
tests.
4.6.4.1 MATRIX 1 correction (1 point matrix correction)
Proceed as follows to perform MATRIX 1:
1. Select SENSOR MENU > AN-ISE SC or AISE SC or NISE SC > CALIBRATE > MATRIX
CORR. .
2. Select MATRIX 1 from the selection window and press ENTER .
3. Select the parameters you wish to correct and confirm by pressing ENTER .
Selection options for AN-ISE sc:
NH
4
+ NO
3
; NH
4
; NO
3
; NH
4
+ K; NO
3
+ Cl; NH
4
+ K NO
3
+ Cl
Selection options for AISE sc:
NH
4
; NH
4
+ K
Selection options for NISE sc:
NO
3
; NO
3
+ Cl
The sensor saves the current values of the selected parameters at this point.
4. Take a water sample immediately from the closest point possible to the sensor. Filter
the sample as quickly as possible and carry out a prompt laboratory analysis of the
selected parameters, as the measurement value can change quickly.
When the laboratory value has been determined, proceed as follows:
5. Select SENSOR MENU > AN-ISE SC or AISE SC or NISE SC > CALIBRATE > ENTER
LABVALUE .
6. The laboratory values for the parameters can only be entered if the MATRIX1
correction has been selected beforehand. Once the laboratory values have been
entered, select
ENTRY COMPLETE to confirm.
When the entered laboratory value is confirmed, the matrix correction is activated.
7. Once the correction is activated, the result CORR-RESULT is shown.
Note: This process must always be carried out in full to make sure the matrix correction is
completed successfully.
If a correction does not produce a successful result, calculations are made with the previous
correction.
CALIBRATE
MATRIX CORR
FURTHER CORR.
INFORMATION
MATRIX 1
TAKE SAMPLE
IMMEDIATELY
AND ANALYSE
IN LABORATORY
CALIBRATE
MATRIX CORR
FURTHER CORR.
LABORW: EING.
INFORMATION