YSI 6 series, User Manual, Page: 95 / 377

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-89
point calibration, but the software will prompt you to place the sonde in the additional solution to complete
the 3-point procedure.
For all rhodamine calibration procedures, be certain that the standard and sensor are thermally equilibrated
prior to proceeding with the calibration.
REESTABILISHING DEFAULT CALIBRATION – “UNCAL” COMMAND
If, for any reason, you want to return to the factory default settings (slope and offset) for any parameter,
follow the instructions below:
 Activate any calibration screen (1-point, 2-point, or 3-point) where a numerical entry is requested. In
the example below, a 2-point turbidity calibration was selected.
 Instead of entering a numeric value, type the word “uncal” and press
Enter
.
 An “uncal” entry at any calibration prompt will reset both slope and offset for this parameter to the
factory default settings.
NOTE:
When using the 650 MDS as the sonde interface device, the “uncal” operation is performed by
holding the Enter key down and then pressing the Esc key. See Section 3 of this manual for more details.
-----Turbidity calibration--
1-1 point
2-2 point
3-3 point
Select option (0 for previous
menu): 2
Enter 1st Turbid NTU:uncal