NEW BRUNSWICK SCIENTIFIC BioFlo 415, Manual To Operations

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BioFlo 415
y
M1360-0050 User’s Guide
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NOTE:
It is important to remember that cascades are based on the loop (whether
DO or pH) Out% value posted in the SUMMARY screen. These numbers
are the basis for all cascades involving that loop. See the examples below
for more explanation.
It can be a very beneficial exercise to watch how the values on the SUMMARY screen
change to reflect differences between the present value (PV), the setpoint, and the DO
output percentage (Out%).
When the PV is greater than the setpoint, the system will be generating a negative
Out% because the controller senses a need to decrease DO:
When the PV is less than the setpoint, the system will be generating a positive Out%,
because the controller senses a need to increase DO:
When the PV equals the setpoint, the Out% should be approximately 0, as the
controller senses no need to make adjustments to DO:
To create a cascade:
1.
Press the CASCADE button to open the CASCADE screen (
see Figure 18
, repeated
here for easy reference):