Hach NT3100sc User Manual page 17

1. Go to the main menu, then select Calibration > Matrix calibration > Start matrix calibration.
Note: There can be one, two or three open matrix calibration points. One of the three open calibration points
must be deleted before a new calibration point can be added.
2. Immediately follow the instructions on the controller to collect a grab sample. Accept the message
immediately after the grab sample is collected. Write the shown Point ID to the sample. Prepare
the grab sample (e.g., filtration) as soon as possible for laboratory measurement.
Note: The measurement data is initially saved on the controller for the probe, then adjusted when the
laboratory values are determined and entered.
3. Measure the grab sample in the laboratory with the two parameters: NO
and NO .
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4. Select Calibration > Matrix calibration > Edit open calibration points.
Note: The Edit open calibration points option only shows when the Matrix calibration is started.
Note: Make sure that the chemical formulas of the sensor and laboratory measurements are the same (e.g.,
NO –N and NO –N or NO
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The first open calibration point is shown.
5. If several grab samples are collected without the laboratory values entered in between, use the
Point ID to make sure that the assignment is correct.
a. To enter an open calibration point, confirm the open point and then select Enter lab values if
the point ID matches the comparison measurement.
b. To delete an open calibration point, confirm the open point and then select Delete this point.
6. Select Next to move to the next point. Select Back to complete the matrix calibration.
7. Select Calibration > Matrix calibration > Information.
Data about the actual matrix calibration shows.
8. Select Calibration > Matrix calibration > Calibration interval to set a reminder for the Matrix
calibration.
Note: The calibration interval refers to the last completed matrix calibration.
If necessary, go back to the factory calibration. Select Calibration > Matrix calibration > Reset to
default.
5.4 Correction via Link2sc
The Link2sc procedure offers a secure method of data exchange between process probes and
Link2sc-compatible photometers using an SD memory card or via a local area network (LAN).
During a pure control measurement, the measurement data is transferred from the probe to the
photometer where it is then archived together with the photometric reference data that has been
recorded.
Refer to the Link2sc user manual for a detailed description of the Link2sc procedure.
5.5 Data logging
The SC Controller provides one data log and one event log for each instrument. The data log stores
the measurement data at selected intervals. The event log stores different types of events that occur
on the devices (i.e., configuration changes, alarms and warning conditions).
The data log and the event log can be saved. Refer to the SC Controller user manual for instructions.
Section 6 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
and NO ).
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C A U T I O N
–N and NO –N or NO
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