Veris U3 Operating Instructions Manual page 16

U3 pH Controls and Indicators. Note: these indicators will only be present when
the U3 pH Controller is turned on.
These indicators help the operator know
when it's time to stop for a pH sample.
These lights indicate when the operator is
within 30%,15%, and 5% of their
designated target sampling distance. The
target sampling distance can be set in the
pH Controller Settings menu. The default
value is 65 meters, which equates to about
1 point per acre.
Figure 5
4-3
Pub# OM20-U3-pH
Figure 4