3 setting instrument flow range and filters, Setting instrument flow range and filters – Bronkhorst CORI-FILL User Manual
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Bronkhorst Cori-Tech BV
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5.3
Setting instrument flow range and filters
In the Tab “Basic” it is possible to (re)range the instrument. Just set the desired range at “Full scale value” or use the slider. A value
between minimum and maximum indicated values can be entered.
If needed the controller speed can be easily adjusted at “Speed”. More advanced controller settings can be adjusted at the Tab
“Controller”.
The picture below shows the full factory FlowPlot version. Please note that FlowPlot customer versions will show less
Tab options.
Auto zero:
Before starting up a dosing process, it is important to auto-zero the instrument
before using it.
Auto-zero the instrument by using FlowPlot. Mind that the instrument should be
powered on for at least 30 minutes before doing an auto-zero, as the instrument
will warm up and this influences the measure value.
Before doing an auto-zero, make sure the tube is filled totally with fluid.
Therefore, give a setpoint for a few seconds. Make sure all gas bubbles are purged
out of the liquid or all liquid drops are purged out of the gas (when using gas).
Then, put the setpoint back to zero and make sure there is no flow. If possible
close other (manual) valves in the flow line. Now press the auto-zero button in
FlowPlot or on the instrument.
Filters:
Instrument filter settings can be adjusted (if needed).
All filters have values between 0…1. Low values mean more filtering. Filter is
switched off when value = 1.0.
The value(s) at “Sensor filter” will also influence the batch counter and the
controlling behavior. “Exponential” is to be set as follows:
0.1 : normal value
< 0.1 : when more dampening is needed (e.g. noise or vibrations);
will slow down measuring signal
0.1…0.5 : when faster signal is needed (e.g. for step responses < 0.5 sec.)
“Adaptive” setting is between 0…1 for CORI-FLOW series and not used (=0) for
mini CORI-FLOW series.
The values at “Output filter”: “Dynamic and Static” can be used to smoothen-up the flow value on the display or in
the graph and will not influence the batch counter.
Typical values are 1.0E-3 for both dynamic and static filter parts. Making these values lower will slow down the
signal (more filtering). Making them higher will speed up the signal (less filtering).
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For more detailed information see:
FlowPlot manual