YSI 556 MPS - Manual (Page 33)

Sensors Section 4
YSI Incorporated YSI 556 MPS Page 27
Figure 4.2 Sensors Enabled Screen Before DO Membrane Selection
A black dot to the left of a sensor indicates that sensor is enabled. Sensors
with an empty circle are disabled.
Highlight the “DO None” entry as shown above and press Enter to display
the membrane choice screen. Consult Section 3.4.2 Membrane Cap
Selection for information on the advantages of each type of membrane
material. Blue membrane caps using 2 mil polyethylene (PE) were shipped
with your YSI 5563 and are likely to be the best choice for most 556 field
applications.
Figure 4.3 Membrane Selection Screen
Highlight the desired membrane choice – in this case, 2 mil PE - and press
Enter to activate your selection with a dot to the left of the screen. Then
press Escape to return to the Sensor menu that now shows your DO
membrane selection.