5. Preparatory calculations and choice of primary element
The basic parameters of a primary element are, as we have seen, the opening ratio β, which defines the contraction geometry of the flow, and the Reynolds number Re D , which defines its dynamics. § 4 above set out how to determine the physical parameters of the fluid immediately upstream of the primary member, which are necessary for measurement: density ρ ...
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Preparatory calculations and choice of primary element
Calculation of a flowmeter with depressurizing element
Installation
Insert the CD ROM into the drive and double-click on "My Computer".
Double-click on the "Setup" icon.
The installation program generates a Program Files \TI\DepWin directory, but you can choose to create a different directory; an icon is also created, and placed on the "Desktop". If this is not the case, you can create a shortcut from Windows Explorer. Don't forget (if you...
Controls
Program commands can be accessed either from a menu bar or from a toolbar below. The list of commands and how to access them is :
The wording of the toolbar icons is that of the hint message that appears when the cursor is brought close to the corresponding icon.
1. File/New menu or "Reset" icon: variables on screen are completely erased. Use to perform a new calculation without...
Program description
Program
The program includes the following functional elements:
A practical note on checking integrated orifices
This note is intended for users who attempt to verify built-in orifices using the present program.
Integrated orifices are devices whose diameters are generally below the minimum limits set by ISO for pipe and primary element diameters, and which may deviate from the standard in many other respects: it is therefore by no means certain that their coefficients are...
Printing data
The DEPWIN program can print out the results displayed on the screen. To do this, simply activate the "Print" command (§ 2). A second screen appears, showing the results as they will be printed.
At the top of this screen is a toolbar:
the first three buttons from the left are zooms, allowing you to select the data display. They have no further effect...
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