YSI 556 MPS - Manual (Page 58)

Section 6 Calibrate
YSI 556 MPS YSI Incorporated Page 52
11. Observe the reading under ORP, when the reading shows no
significant change for approximately 30 seconds, press Enter.
The screen will indicate that the calibration has been accepted
and prompt you to press Enter again to Continue.
12. Press Enter. This returns you to the Calibrate Screen. See
Figure 6.2 Calibrate Screen.
13. Rinse the probe module and sensors in tap or purified water
and dry.
6.3 Return to Factory Settings.
1. Go to the calibrate screen as described in Section 6.2.1
Accessing the Calibrate Screen.
2. Use the arrow keys to highlight the Conductivity selection.
See Figure 6.2 Calibrate Screen.
NOTE: We will use the Conductivity sensor as an example;
however, this process will work for any sensor.
3. Press Enter. The Conductivity Calibration Selection Screen is
displayed. See Figure 6.3 Conductivity Calibration Selection
Screen.
4. Use the arrow keys to highlight the Specific Conductance
selection.
5. Press Enter. The Conductivity Calibration Entry Screen is
displayed. See Figure 6.4 Conductivity Calibration Entry
Screen.
6. Press and hold the Enter key down and press the Escape key.