Flowlink 5.1 Software Instruction Manual - Isco

Isco Flowlink 5.1 ® Software
Site Window - 2100
1. Select the type of time table. The options are:
• Specific – Start/stop dates and times for one-time
use.
• Weekly – Start/stop days of week and times,
recurring weekly.
• Daily – Start/stop times, recurring daily.
• Mon-Fri – Start/stop times, recurring each day of the
workweek.
2. Complete the Start and Stop fields. The resulting
duration will be displayed in the text box below the entry
fields.
3. Click OK. The time table is defined and ready for use in
an equation.
Range
Rain Event (2105)
Range conditions are TRUE when a measured parameter value
is inside or outside specified upper and lower limits.
To define the Range condition:
1. Select a measured data type from the “Parameter name”
drop-down list.
2. Enter the Upper and Lower limits. The units of measure
were automatically assigned when the data type was
chosen.
3. Choose the Inside or Outside range option.
4. Enter a hysteresis and duration.
Combined, the hysteresis and time duration prevent
occurrences of the condition repeatedly toggling between
TRUE and FALSE if the measured parameter hovers
near a limit. Likewise, the duration can prevent the
condition from changing states due to a single anomalous
measurement.
A hysteresis is a tolerance for variances in the measured
data. For example, if an upper limit is set for 3.0 feet and
the level measurements vary slightly between 2.99 and
3.01 ft, the state of the condition would change each time
a reading crosses the limit. Adding a hysteresis of 0.1
would mean that once the condition is true at 3.0 feet, the
level must fall to 2.9 feet before the condition would be
false.
The duration setting requires all of the readings for the
time duration to be inside (or outside) the range before
the condition is met.
Rain Event conditions are TRUE when rainfall increases
at a specified rate.
An example of a rain event condition would be to use
measured rainfall to enable a sampler for a rain event.
You may want to collect samples only if you received 0.25
inches of rain in a one-hour time span, and only if rainfall
has been less than 0.25 inches for a week.
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