YSI 556 MPS - Manual (Page 59)

Calibrate Section 6
YSI Incorporated YSI 556 MPS Page 53
Figure 6.17 ORP Calibration Screen
7. Use the arrow keys to highlight the YES selection.
CAUTION: This returns a sensor to the factory settings. For
example, in selecting to return specific conductance to the
factory setting, salinity and conductivity will automatically
return to their factory settings.
8. Press Enter. This returns you to the Conductivity Calibrate
Selection Screen, See Figure 6.3 Conductivity Calibration
Selection Screen. .
9. Press Escape to return to the calibrate menu. See Figure 6.2
Calibrate Screen.