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