Flowlink 5.1 Software Instruction Manual - Isco

Isco Flowlink 5.1 ® Software
Graph Window
• Avg Flow - If the selected series contains flow rate data,
select this option to display the average flow rate for the
displayed time span above the graph.
Graph Properties -
Series Formulas
Series formulas can apply mathematical operations to data sets.
With formulas, you can add, subtract, multiply, divide, and/or use
exponentiation, absolute values, and negative integers.
Operations can be grouped with parentheses to control the order
of execution.
Example. Use a series formula to plot the average level recorded
at two sites.
(The example assumes that a blank New graph was created
using the File>New menu option. The following steps start with
the Series tab of the Graph Properties window, although the
General and Time Scale settings should also be defined.)
1. The List of Series and Data Sets box shows S1 and 1A
undefined. Highlight data set 1A.
2. Identify the source of data. Click the Select… button and
locate the level data set for the first site.
3. Click the New Data Set button. Flowlink adds data set
1B, highlighted, but undefined.
4. Identify the source of data. Click the Select… button and
locate the level data set for the second site.
5. Highlight series S1.
6. Select Series Formula from the Operation pull-down list.
Flowlink displays the Formula entry box.
7. Type the formula in the box using the variables assigned
in the List of Series and Data Sets. For the example, type
(1A+1B)/2.
The following symbols may be used:
+ addition operator
- can be used as a:
subtraction operator, e.g. “1A - 1B”
binary minus symbol, e.g. “1A * (-1)”
unary negation operator, e.g. “(-(1A + 1B))”
* multiplication operator
/ division operator
^ exponentiation operator
| enclose absolute values, e.g. “(|1A * 2^2| * 8)”
( ) parentheses group operations and control the order of
execution.
Notes:
• For best results, always recalculate the data sets using
the averaging statistical function. (Select the AVG button
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