Flowlink 5.1 Software Instruction Manual - Isco

Isco Flowlink 5.1 ® Software
Site Window - 4100/4200/6700
3. Enter at least four data points in the table. The table can
hold a maximum of 50 data points. If you have copied
data points from another table or spreadsheet, select the
top-left cell and press Control-V on your keyboard to
paste the data from the clipboard.
Each data point requires two values:
• Level to flow requires a flow stream level and the
flow rate that corresponds to that measured level.
• Level to area requires a flow stream level and the
cross-sectional area of the channel at that level.
4. Select OK when the set is complete.
Note: The conversion accuracy between points increases with
the number of points entered. Keep in mind that you are defining
the entire channel shape mathematically; select points that best
represent any curves or variations. Compound shapes will need
many data points.
Maximum level
Sampler Control -
4100/4200
Sampler Enable
Isco instruments that build an internal flow conversion table to
convert readings to flow rates require a Maximum Level. For
most standard primary devices, this is information available
from the manufacturer.
However, you should not arbitrarily enter a value such as the
largest value from a primary device specification sheet. Instead,
use a value that is somewhat above the highest expected level for
your actual situation, even if that level is less than the published
maximum for a given primary device. This will improve the
resolution of the conversion table. For example, if the channel is
six feet deep, but the stream level rarely exceeds four feet,
resolution can be improved if the points within the table were
scaled over four feet instead of six.
Caution: If the actual depth exceeds the entered maximum
level, flow rates will not be calculated for those levels above the
entered maximum level. The indicated flow rate will peak when
depth reaches the maximum level and remain there until actual
depth drops below the entered maximum head.
This tab of the Site window displays the settings that flow
measurement instruments use to control a connected sampler.
These flow measurement instruments can control two sampler
functions - sampler enable and sampler pacing.
Set up the sampler enable by choosing one of the three options in
the When to Enable box.
• Always - sets the sampler inhibit line to always enable
the sampler.
• Never - sets the sampler inhibit line to always disable the
sampler.
• On trigger - controls the sampler inhibit line with a userdefined
condition.
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