SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
303
On the other hand, absolute calculations require that the user enter information such as: the
physical dimensions of the PMD and the constant relating to units of measure for both linear
dimensions and flow rates.
Example:
the general formula for flow through a single exponent PMD is:
Q = KH
x
the specific formula for flow through a 45 ° V-notch weir is:
cfs = 1.03H
2.5
thus: Q = flow in cubic feet per second
K = constant of 1.03
H = head in feet
The absolute method is not applicable to the following:
● Palmer Bowlus Flume
● H-Flume
A.7.2 Data Logging
Data logs are available for Alarms, OCM flow, Daily Totals, and Primary Variable. The logs
can be examined locally via LUI (see View Logs (3.2.6.) (Page 243)), or by uploading the
logs to a PC using USB and the Web Browser tool on a computer.
Using the Web Browser tool, choose menu item Maintenance and Diagnostics > Diagnostics
>
Data Logs page which displays a Load Logs button. Click this button and you will be
prompted with a dialog box that allows you to choose the location on your local PC where
the uploaded logs will be placed. Note that the logs uploaded at this point will replace any
previous logs you may have uploaded before, so be sure to choose an empty directory here
to avoid losing logs you may have uploaded in the past.
Log files written to a local computer drive via USB, are comma-delimited files, and a list of
file headings for each type of log is shown below.
Alarm Name
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