Hach AN-ISE sc, Addendum To The Operator Manual

Page: 14 / 152

14 English
Operation
5. Go to the sensor menu and select
CALIBRATION > MATRIX
CORRECTION >
2-point value correction and 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 push
CONFIRM THE ENTRY
.
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 push
CONFIRM THE ENTRY
.
Correction 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.
4.3.4.4 2-point matrix correction
Proceed as follows to perform 2-point matrix correction:
1. Select
SENSOR MENU > AN-ISE SC
or
AISE SC
or
NISE SC >
CALIBRATION > MORE CORRECTIONS
.
2. Select 2-point matrix correction from the selection window
and press
ENTER
.
3. Select the Parameter requiring a 2-point matrix correction.
4. Select the point to be corrected.
5.
SELECT Concentration measurement 1
or
Concentration
measurement 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 > MORE CORRECTIONS>
2-point matrix
correction
8. Select the parameters to be corrected with the laboratory value
entry:
Enter the values for the
first point
AN–ISE SC NH
4
–N
AN–ISE SC K
Lab value NH
4
–N
Confirm the entry.
Enter the values for the
second point
AN–ISE SC NH
4
–N
AN–ISE SC K
Lab value NH
4
–N
Confirm the entry.
Ammonium
Concentration
measurement 1
Date
Enter the lab value 1.
Concentration
measurement 2
Date
Enter the lab value 2.