YSI YSI 556 MPS, Set-Up, Operation & Calibration

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•
Use the arrow keys to highlight the ORP
selection. Press Enter . The ORP calibration
screen is displayed.
•
Place the correct amount of a known ORP
solution (we recommend Zobell solution) into a
clean, dry or pre-rinsed transport/calibration cup.
•
Carefully immerse the sensor end of the probe
module into the solution.
•
Gently rotate and/or move the probe module up
and down to remove any bubbles from the ORP
sensor.
•
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.
ORP
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