Flowlink 5.1 Software Instruction Manual - Isco
Flowlink 5.1 Software Instruction Manual - Isco
Flowlink 5.1 Software Instruction Manual - Isco
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Isco</strong> <strong>Flowlink</strong> <strong>5.1</strong> ® <strong>Software</strong><br />
Graph Window<br />
Since summary intervals re-sample the data to the interval you<br />
specify, it can serve a number of purposes:<br />
• Generating a table to report hourly average flow rate<br />
summaries (Avg)<br />
• Generating a table to report hourly or daily rainfall<br />
totals (Sum)<br />
• Smoothing the appearance of data in a graph (Avg)<br />
• Generating a table to report the peak daily flow rate and<br />
the time it occurred (Max)<br />
• Generating a table to report the minimum recorded pH<br />
value and the time it occurred (Min)<br />
• Preparing data for additional operations, such as Series<br />
Formulas or Volume Conversions (Avg)<br />
Recalculating the data to summary intervals is a simple process.<br />
For example, suppose a flow rate data set contains readings at<br />
five-minute intervals. Applying an Average statistical function<br />
over a one-hour summary interval would calculate the average<br />
value from the twelve readings recorded each hour. This<br />
recalculated data set could then be plotted on the graph, reported<br />
in a table, or be used in additional operations.<br />
You should keep in mind that this recalculated data must still<br />
include a time stamp. <strong>Flowlink</strong> uses the “Display times at<br />
Beginning or end of interval” to specify where the time stamp is<br />
placed. Continuing with the above example, let’s look at a single<br />
summary interval from 8:00 to 9:00 am. <strong>Flowlink</strong> averages the<br />
readings starting with 8:05, 8:10, 8:15, through 9:00 am. With<br />
Beginning selected, the time stamp is 8:00 am. With End<br />
selected, the time stamp is 9:00. If your summary interval is one<br />
day, “Beginning” is typically used.<br />
For additional consideration, <strong>Isco</strong> instruments always place the<br />
time stamp at the end. <strong>Isco</strong> instruments can take readings quite<br />
often, depending on their configuration and current state. If the<br />
instrument takes a reading every 5 seconds (to keep the LCD<br />
readout current), but only records the readings in a memory<br />
partition at 10-minute intervals, it records the average of 120<br />
readings (12 per minute for 10 minutes) and time-stamps the<br />
average with the current (end) time.<br />
When the “Accumulate with reset” statistical function is selected,<br />
summary intervals are used only to reset the count to zero to<br />
begin the next interval. Summary Intervals are ignored when the<br />
“Accumulate without reset” statistical function is selected.<br />
Graph Properties -<br />
Flow Conversion<br />
Flow Conversion operations can perform off-line flow conversion<br />
with level, or level and velocity data sets.<br />
To calculate a flow rate off-line, the List of Series and Data Sets<br />
should contain at least one series and one level data set for a<br />
level-to-flow conversion. Area velocity flow conversions should<br />
contain at least one series, and two data sets - level and velocity.<br />
121