6 calibration/matrix correction, Calibration/matrix correction, Operation – Hach-Lange NISE sc User Manual
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Operation
4.6 Calibration/matrix correction
The four electrodes with the reference system of the compact sensor cartridge were
calibrated with one another at the factory using special standard solutions (CARTICAL
TM
).
However, the membranes on the ion-selective electrodes are not 100%
selective due to
other substances that may affect the measurement. Perform a matrix correction (refer to
) to compensate for other ions present on the ISE electrodes.
Potassium has the largest interference effect on the ammonium membrane, while chloride
has the largest effect on the nitrate membrane. The AN-ISE
sc probe compensates for this
problem with the aid of a built-in potassium/chloride electrode.
When using the AISE sc probe, only the ammonium membrane and the integrated
potassium electrode are active.
SENSOR MENU
SIGNALS
Signals and measurement results of the individual measurement
channels
AMMONIUM
1,2
Display the signals and measurement results for ammonium
NITRATE
1,3
Shows the signals and measurement results for nitrate
POTASSIUM
1,2
Display the signals and measurement results for potassium
CHLORIDE
1,3
Display the signals and measurement results for chloride
REF. ELECTRODE
Displays the signals and measurement results for the reference
system
MV RAW
Display the signals and measurement results for MV RAW
IMPED STATUS
Display the signals and measurement results for impedance
TEMP
Display the signals and measurement results for temperature
HUMIDITY
Display the signals and measurement results for humidity
RFID
Display the signals and measurement results for RFID
CAL DAYS
Shows the age of the last matrix correction
AMMONIUM
1,2
Display the age of the last matrix correction for ammonium
NITRATE
1,3
Display the age of the last matrix correction for nitrate
SERVICE
TEST CARTRIDGE
Perform a sensor check with the test cartridge
TEST CARTRIDGE READY? PRESS ENTER
TEST CARTRIDGE
Display whether the individual sensor channels are OK or not
DIAG/TEST
Displays whether or not DIAG/TEST is OK
GNDROD
Displays whether or not GNDROD is OK
REF
Displays whether or not REF channel is OK
NO3
1,3
Displays whether or not NO3 channel is OK
NH4
1,2
Displays whether or not NH4 channel is OK
ORP
Displays whether or not ORP channel is OK
CL
1,3
Shows whether or not Cl channel is OK
K+
1,2
Displays whether or not K channel is OK
TEMP
Displays whether or not temperature channel is OK
CHANGE CARTR.
Follow the menu process
CLEANING
Follow the menu process
1
Applies to AN-ISE sc
2
Applies to AISE sc
3
Applies to NISE sc