YSI 556 MPS - Manual (Page 57)

Calibrate Section 6
YSI Incorporated YSI 556 MPS Page 51
8. Use the keypad to enter the correct value of the calibration
solution you are using at the current temperature. Refer to
Table 6.2 Zobell Solution Values.
Temperature °C Zobell Solution Value, mV
-5 270.0
0 263.5
5 257.0
10 250.5
15 244.0
20 237.5
25 231.0
30 224.5
35 218.0
40 211.5
45 205.0
50 198.5
Table 6.2 Zobell Solution Values
9. Press Enter. The ORP calibration screen is displayed.
Figure 6.16 DO Cal Screen
10. Allow at least one minute for temperature equilibration before
proceeding. The current values of all enabled sensors will
appear on the screen and will change with time as they
stabilize.
NOTE: Verify that the temperature reading matches the value
you used in Table 6.2 Zobell Solution Values.