Hach-Lange NO3D sc Nitrate Sensor - Manual (Page 25)

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Operation
The currently measured nitrate and chloride values are displayed.
The drift indicates whether the measured value is stable.
4. Wait until the measured value is stable and confirm by pressing
ENTER (Drift should be < 0.03 mg/L). The values for nitrate and
chloride are saved.
5. Immediately after saving, take a water sample for laboratory
analysis from as close to the sensor as possible.
6. Analyze the sample immediately after taking the sample as its
nitrate content can change quickly.
After determining the laboratory reference values for chloride and
nitrate, proceed as follows:
7. Select SENSOR SETUP>NO3D SC>CALIBRATE>
SET NO3–N CONC .
8. Enter the laboratory reference value for NO
3
–N and press
ENTER to confirm.
9. Select SENSOR SETUP>NO3D SC>CALIBRATE>
SET CL- CONC .
10. Enter the laboratory reference value for chloride and press
ENTER to confirm.
Confirmation of the entered laboratory value activates the
matrix correction.
4.6.3.3 MATX2 correction (2nd point matrix correction)
Proceed as follows to perform the MATX2:
1. Select SENSOR SETUP>NO3D SC>CALIBRATE>CAL CONFIG .
2. Select MATX2 in the selection window and press ENTER .
3. Select CONC MEAS 1 .
The currently measured nitrate and chloride values are displayed.
The drift indicates whether the measured value is stable.
4. Wait until the measured value is stable (Drift should be
< 0.03 mg/L) and press ENTER to confirm. The value for nitrate
is saved.
5. Immediately after measuring, take a water sample for
laboratory analysis from as close to the sensor as possible.
6. Analyze the sample immediately after taking the sample as its
nitrate content can change quickly.
READING STABLE?
NO3–N:
DRIFT
CL-
DRIFT
CALIBRATE
CAL. CONFIG.
CONC MEAS 1
DATE
SET NO3–N CONC
CONC MEAS 2
DATE
SET NO3–N CONC
READING STABLE?
NO3–N:
DRIFT
CL-
DRIFT