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 - 4100/4200/6700<br />
• Variable Blanking is only applicable to Ultrasonic<br />
instruments. Enter the variable blanking distance.<br />
Minimum depth for velocity Box - displays Minimum depth<br />
for velocity. This setting is only applicable for area velocity<br />
instruments with a standard or extended range sensor.<br />
Set flow rate to zero if no velocity data Check box - controls<br />
what an area velocity flow meter stores as flow rate readings<br />
when it is unable to measure velocity.<br />
View last Box - Contains three buttons, Report, History, and<br />
Program. These buttons are active if a text file was downloaded<br />
during the last data retrieval. This communication option must<br />
first be enabled.<br />
Password Box - Reports the current status of the instrument’s<br />
password protection and provides buttons to change and remove<br />
the password.<br />
Totalizers Box - Contains two buttons to reset the totalizers to<br />
zero.<br />
• Zero Total Flow button resets the cumulative flow<br />
reported in the Measurements tab of the Site Window.<br />
• Zero Sampler Enable Total Flow button resets the<br />
sampler enable flow count to zero.<br />
Press the Configure Like Another button to configure the<br />
current site so it has the same settings as another. (The site<br />
name will not be changed.) After pressing the button, you will be<br />
prompted to select a site from the Select A Site dialog box. Select<br />
the appropriate site and click OK.<br />
Variable Blanking<br />
Minimum depth for<br />
velocity<br />
Ultrasonic instruments can vary the blanking to avoid erroneous<br />
level readings. Proper selection of a value will ensure that the<br />
flow meter accepts only valid echoes from the surface of the<br />
liquid, while disregarding invalid returns from the walls, sides of<br />
the channel, manhole rungs, or other obstructions.<br />
Enter this value as the distance from the face of the ultrasonic<br />
level sensor to the maximum expected liquid level. Refer to the<br />
instrument’s instruction manual to calculate this distance. The<br />
flow meter will then ignore any echo reflected from this distance<br />
or less. Keep in mind that if the liquid level rises into the<br />
variable blanking distance, the flow meter will ignore the return<br />
from the liquid surface.<br />
For area velocity instruments with a standard or extended range<br />
sensor, this sets the minimum depth for measured velocity<br />
readings. Below this level, the flow meter approximates the<br />
velocity using earlier readings, and will not be able to detect the<br />
direction of flow. Refer to the instrument’s instruction manual to<br />
determine the correct setting.<br />
Area velocity flow meters using a low-profile sensor do not<br />
require a minimum depth setting. Low profile sensors always use<br />
one inch (25 mm).<br />
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