YSI 556 MPS - Manual (Page 55)

Calibrate Section 6
YSI Incorporated YSI 556 MPS Page 49
The screen will indicate that the calibration has been accepted
and prompt you to press Enter again to Continue.
14. Press Enter. This returns you to the specified pH Calibration
Screen, See Figure 6.13 pH Entry Screen.
15. Rinse the probe module, transport/calibration cup and sensors
in tap or purified water and dry.
16. Repeat steps 6 through 13 above using a second pH buffer.
17. Press Enter. This returns you to the pH Calibration Screen,
See Figure 6.12 pH Calibration Screen.
18. Press Escape to return to the calibrate menu. See Figure 6.2
Calibrate Screen.
19. Rinse the probe module and sensors in tap or purified water
and dry.
6.2.5 ORP Calibration
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 ORP selection. See Figure
6.2 Calibrate Screen..
3. Press Enter. The ORP calibration screen is displayed.