Accusonic 8510+ series Reference Manual page 67

7-12 Accusonic Model 8510+ Series Flowmeter
Low Flow Cutoff 0.0001 or more -0.0001 or less See description in Section Parameters.
With this configuration, Section #1 will give a positive value for all forward flows, and zero for reverse
flows.
Section #2 will give a positive value for all reverse flows, and zero for forward flows.
For Compound or open channel situations, contact Accusonic.
Relay to Indicate That a Section is Good
For flowmeters which are used for automatic plant control, it is often desirable to have a relay to indicate
"Section Good", rather than "Section Failed". The difference being that "Section Good" should be
energized only when the section is "good", be de-energized immediately it is "bad", and allow for a delay
between the section recovering and the relay becoming energized. The "Section Failed" concept does not
provide this logic.
To provide this: Enable a "dummy" path in the section, (e.g. Path #10), to which nothing is connected.
Set Section parameter Min Good Paths to the minimum number required for flow calculation.
Set "dummy" path Length to 1.0, Weight to 0, Other parameters to 1 or ignore.
Set Relay parameter for desired Section, Type to 3 (Path Sub), Delay as required, Polarity to 0.