Options Dialog Box - Units Tab
The Units tab modifies the unit settings for the current hydraulic model.
The Units tab contains the following controls:
| Save As | Saves the current unit settings as a separate .xml file. This file allows you to reuse your Units settings in another hydraulic model. When the button is clicked, a Windows Save As dialog box opens, allowing you to enter a name and specify the directory location of the .xml file. |
| Load | Loads a previously created Units hydraulic model .xml file, thereby transferring the unit and format settings that were defined in the previous hydraulic model. When the button is clicked, a Windows Load dialog box opens, allowing you to browse to the location of the desired .xml file. |
| Reset Defaults - SI | Resets the unit and formatting settings to the original factory defaults for the System International (Metric) system. |
| Reset Defaults - US | Resets the unit and formatting settings to the original factory defaults for the Imperial (U.S.) system. |
| Default Unit System for New Hydraulic Model | Specifies the unit system that is used globally across the hydraulic model. Note that you can locally change any number of attributes to the unit system other than the ones specified here. |
| Units Table | The units table contains the following columns: Label —Displays the parameter measured by the unit. Unit —Displays the type of measurement. To change the unit of an attribute type, click the choice list and click the unit you want. This option also allows you to use both U.S. customary and SI units in the same worksheet. Display Precision —Sets the rounding of numbers and number of digits displayed after the decimal point. Enter a number from 0 to 15 to indicate the number of digits after the decimal point. Format Menu —Selects the display format used by the current field. Choices include: Scientific —Converts the entered value to a string of the form "-d.ddd...E+ddd" or "-d.ddd...e+ddd", where each 'd' indicates a digit (0-9). The string starts with a minus sign if the number is negative. Fixed Point —Abides by the display precision setting and automatically enters zeros after the decimal place to do so. With a display precision of 3, an entered value of 3.5 displays as 3.500. General —Truncates any zeros after the decimal point, regardless of the display precision value. With a display precision of 3, the value that would appear as 5.200 in Fixed Point format displays as 5.2 when using General format. The number is also rounded. So, an entered value of 5.35 displays as 5.4, regardless of the display precision. Number —Converts the entered value to a string of the form "-d,ddd,ddd.ddd...", where each 'd' indicates a digit (0-9). The string starts with a minus sign if the number is negative. Thousand separators are inserted between each group of three digits to the left of the decimal point. |
Note: The conversion for pressure to ft. (or m) H20 uses the specific gravity of water at 4C (39F), or a specific gravity of 1. Hence, if the fluid being used in the simulation uses a specific gravity other than 1, the sum of the pressure in ft. (or m) H20 and the node elevation will not be exactly equal to the calculated hydraulic grade line (HGL).