Burkert Flowave 8098, Operating Instructions Manual

Page: 247 / 354

247
SAW sensor – Parameter
Type 8098 FLOWave L
15.16 Setting the refresh time
15.16.1 Use case of the refresh time
The refresh time is the minimum time needed to update a measurement value. The refresh time has no
effect on the damping of the measured values.
The refresh time of the temperature values is a constant but the refresh time of the other measurement
values can be adapted to the process:
•
A very short refresh time is needed if the process requires quick measurement updates, for example for
very short dosings.
• A long refresh time is sufficient if for example there are slow flow rate changes in the process.
15.16.2 Changing the refresh time
3 refresh times are available:
• a
Long refresh time, i.e. the duration between 2 measurement updates is approximately 100 ms.
• a Short refresh time, i.e. the duration between 2 measurement updates is approximately 70 ms. Default setting.
• a Very short refresh time, i.e. the duration between 2 measurement updates is approximately 30 ms.
If the very short refresh time is set:
• The diagnostics event
Not totally filled is not available.
• The measurement deviation for a flow rate between 10 % of the full scale and the full scale is ±0.6 %.
• The repeatability for a flow rate between 10 % of the full scale and the full scale is ±0.3 %.
If a digital output is configured as a pulse output, the following durations must be added to the last
received pulse:
•
50 ms, if the refresh time is set to
Very short
,
• 80 ms, if the refresh time is set to Short ,
• 140 ms, if the refresh time is set to Long .
To change the refresh time, do the following:
→
Go to the
CONFIGURATION
view.
→
SAW sensor
→
Confirm to access the Parameter view.
→
Refresh time .
→
Choose the refresh time.
→
Save.
The refresh time is changed.
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