Hach-Lange GANIMEDE N - Manual (Page 41)

41
Operation
• Position 36: 2nd high standard, e.g. 100 mg/L TN
B
GCS 100
The low standards can be selected freely in the range 0.5–30 mg/L TN
B
; the high
standards can be selected freely in the range 30–150 mg/L TN
B
.
3. Place the sample tray on the sample changer.
4. Switch on the analysis unit and the sample changer.
5. Select the desired sample batch with the cursor keys and the enter key.
A connection to the analysis unit is established automatically via the IR interface
(maximum distance 0.5 meters).
6. Select the desired parameter (phosphorus or nitrogen).
The measuring procedure is started.
Note: The open-loop control unit must not be moved or removed during the transmission
procedure. The whole data transfer is shown on the display.
The open-loop control unit/analysis unit connection is disconnected automatically.
7. Close the window with the upper menu key.
4.2.3 Calibration (recording of multi-point calibrations)
4.2.3.1 Ganimede P
In the storage locations for STD. CURVE 1, 2 and 3, standard curves with 2 to 11
measurement points are measured and stored. The device refers to these stored curves if
the sample batch is to be processed after the multi-point calibration.
1. Select standard curves 1, 2 or 3.
The selected standard curve is opened; standard curves that have already been
stored can be modified individually.
2. Select the standard concentration to be changed and confirm the input.
3. Enter the standard concentration with the alphanumeric keys or the connected
keypad and confirm the input.
4. Add further standard measurement points or remove points with the shortcut keys.
5. Open the standard series graphically with the GRAPH shortcut key.
The standard curve can be printed out with Enter.
6. Measure the standard absorbances with the MEASURE shortcut key.
7. Load the sample changer with the desired standard solutions in ascending order from
position 1.
The standard solutions GCS 050 and GCS 100 with 0.2 mg/L and 2 mg/L PO
4
-P and
their dilutions are recommended.
8. Make the analysis unit ready for operation.
9. Switch on the analysis unit and the sample changer.
10. Start the measurements of the standard solutions with the MEASURE shortcut key.
A connection to the analysis unit is established automatically via the IR interface.
11. Select the phosphorus parameter.
The measuring process is started.
Note: The open-loop control unit must not be moved or removed during the transmission
procedure. The whole data transfer is shown on the display.