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PsyChart Version 3 Recent Update History

Version Changes

Version 3.01.15 [10/1/2025]

1. Fixed a bug where if you had saved a project with chart bins where the chart bin width and height were different from the default values, the chart bin sizes restored to the chart from the project file were incorrectly reset back to the default sizes.

2. On the Chart Bins window, replaced the "Days/Week" option with an array of 31 "Days in Month" checkboxes that let you select one or more days per month for the bins you create. This feature allows you to fine tune the bin creation down to just one day, for example.

3. On the Create and Manage Point Groups tab of the Point Groups window, changed the caption of the "Points Not in Group" list to "Points Not in Any Point Group" to indicate that the list does not include any points that already belong to any point group, and are thus ineligible to be added to the current group with the Add Points to Group button.

4. Fixed a bug on the Create and Manage Point Groups tab of the Point Groups window, where if you deleted a point group but chose to not delete the points in the group, the points would still be sometimes treated as if they were part of a point group. For example, those points would not show up in the Points Not in Any Point Group list.

5. Made it so if the Point Groups window is open when you create one or more new points on the chart without using that window, the new points show up in the Points Not in Any Point Group list without you having to click that window's Refresh button on the Create and Manage Point Groups tab.

6. Changed some defaults for the chart bin legend: the dry bulb stats go from high to low is now turned on by default, and the dry bulb stats increment per row is now 5 instead of 10, and the default first color for the Multicolor option is now a fainter shade of blue.

7. On the Chart Bins window, lowered the smallest bin width from 1 to 0.5 degrees.

8. Added a "Close" menu item under the File menu, which is performs the same function as "File | New," but makes it more clear for some users how to discard changes you made to the current project.

9. Added a "Show Point Group" checkbox to the options on the Point Groups window, which lets you choose whether or not to show the points in a point group.

10. Changed the "Chart | Clear" menu item to say, "Delete All Points and Processes," since that is what this menu item does.

11. Removed the "Chart | Paste Chart Properties" menu item, since it only pasted the data you enter on the Chart Properties window, which does not seem very useful now.

12. Changed the "Chart | Copy Chart Data" menu item so that it includes everything about the current chart, so that when you paste it into another chart the result is a chart that is identical in every way to the one you copied.

13. Changed the "Chart | Paste All" menu item to instead say, "Paste Chart Data," since it now pastes everything about the copied chart into the current chart.

14. On the Air Handler Model window, added a list item to the dropdown help for the Elevation input that lets you set that input to equal the elevation of the current chart. This feature is useful when the points and processes for an air handler model have already been created on the current chart.

15. On the Air Handler Model window, made it so if you keep the elevation of the model the same as that of the chart, any other points and processes on the chart that are not part of a previously created air handler model will not be deleted upon creating the new model.

16. On the Air Handler Model window, made it so if you change the elevation of the model to be different from that of the current chart, and there are any existing points and processes that are not part of a previously created air handler model, upon clicking Create Model a message box will ask you to confirm that you want to delete the non-air handler model points and processes so that the new model can be created.

17. Made the Point Groups window remember its previous location on the screen with respect to the main window from which it was opened. Did the same for the Chart Bins window.

18. Made it so if you delete a point on the chart that is part of a point group that had the Show Lines feature turned on, the lines between remaining points in the point group will immediately be redrawn, instead of waiting for other operations to take place.

Version 3.01.10 [9/16/2025]

1. For the optional point shown to indicate the center point used for the sensible heat ratio lines, corrected a problem where the "SHR Ctr" text label was printed slightly too far to the left when printing the chart.

2. Moved the default position of the "Quito, Ecuador" or "Default Psychrometric Chart" note that gets added for a new project down from the top a little more. Also moved the default position of the chart bin city and elevation note and chart bin legend down by the same amount.

3. On the Chart Properties dialog, made it so when you switch from English to metric units (and vice-versa) the lines for V, specific volume, are set to an appropriate value so that you get about the same number of main and sub coordinate lines as before.

4. Modified the virtual coordinate system to fix a problem where notes positioned near the top of the chart would become temporarily invisible upon zooming far in to the chart. The same problem is now fixed for the chart bin legend and the horizontal sensible heat ratio line above the chart.

5. Made it so the X and Y virtual coordinate values shown for the current mousepointer position in the Properties at Mouse Pointer toolbar are now shown even when the mouse pointer is not within the extents of the chart.

Version 3.01.7 [9/8/2025]

1. On the floating report windows (State Point, Process Energy, and Process Input/Output) added the units of each quantity to the column headers.

Version 3.01.5 [9/2/2025] (Official Release)

1. Updated the sample projects to work with the released version and to be within the demo limits.

2. Fixed a bug that could happen when moving a note or the chart bin legend when the Keep Aspect Ratio option for a chart was turned on, where if the main window was very close to being equal to the aspect ratio, it was possible for the note or legend to be positioned a little too far to the right or a little too low upon completing the move.

3. Fixed a bug where the coordinate label alignments for the new coordinate types (dew point, vapor pressure and sensible heat ratio) were not being set to the default of Center Left upon opening a PsyChart version 2 project.

4. Updated the help file to include the newest changes to the Chart Bins window and the chart bin legend on the chart.

Version 3.00.95 [8/29/2025] (Test Version)

1. Fixed a bug where if you had added chart bins to a chart and had changed any of the values on the Chart Bins window to be different from the defaults, then when you created a new project or added a new chart to the current project, some of the values from the previous chart would carry over into the new chart.

2. On the Chart Bins window, when any of the Months checkboxes were unchecked, made the Selected Hours label shows the exact number of hours based on each month's number of days (except for leap years).

3. Added an optional "Dry Bulb Stats" section to the chart bin legend.

4. Added the ability to move the chart bin legend by clicking it and selecting "Move" from the new popup menu.

5. Added other items to the chart bin legend popup menu, including "Hide," "Show Dry Bulb Statistics," and "Dry Bulb Statistics Go from High to Low." Clicking any of these items immediately changes the legend.

6. Removed Bin Count label and Create Example Bin button and inputs from Chart Bins window.

7. Reduced the number of redraws happening when generating chart bins.

8. When the license level is demo, added elevation check to the Chart Bins window to prevent trying to create bins for a city with elevation outside the demo limits.

Version 3.00.87 [8/13/2025] (Beta 2)

1. On the Chart Bins window, if the current project has not had any chart bins created, made it so the last city shown in the "My cities with data" box is remembered the next time you open the Chart Bins window.

2. Fixed a bug in the color assignments of chart bins, where the number of hours of a bin did not always correspond to the color in the legend.

3. On the Properties at MousePointer toolbar (which shows the dry bulb, etc., at the current mousepointer position), added a tool to show the number of hours that occurred in the current chart bin, if the mousepointer happens to be over a chart bin.

4. Fixed a bug in the creation of chart bins on the Chart Bins window, where if the Humidity Units input on the Chart Properties dialog was set to "Gr or kg" instead of "Fraction," then the chart bins would not be created.

5. Added back the apparent white lines between adjacent chart bins, which were removed from the previous update, in order to more easily distinguish one bin from another.

6. Fixed a bug in the creation of chart bins, where if the elevation was higher than the existing chart before chart bin creation the chart bins and chart would not correspond exactly to the Properties at Mousepointer values.

7. Moved the default position of the chart bin legend to be closer to the top of the chart.

8. Fixed a bug in chart bin creation where the elevation was not being converted from meters to feet for an English units chart, and the maximum dry bulb was not being converted to meters for a metric units chart.

9. Fixed a bug where the chart bin width and height defined on the Chart Bins window were not being remembered the next time you open the window while in the same project.

10. On the Chart Bins window, changed the "Add note with city name" option to include the elevation.

11. Changed the included "Sample Chart Bins.ps3" project to Quito, Ecuador so that the elevation is within the range of the demo level of the program.

Version 3.00.82 [8/7/2025] (Beta 2)

1. Fixed a bug where if you changed any of the properties on the Chart Properties dialog that require that all points and processes be deleted (Elevation, etc.), it would not also delete any existing chart bins that may have been created.

2. Made adjustments to the vapor pressure and sensible heat ratio lines and labels.

3. Changed the default dew point main coordinate line increment from 5 to 10 degrees in order to make the default chart's dew point labels not overlap each other near the bottom of the chart.

4. Made an adjustment to the default sensible heat ratio coordinate line labels.

5. Fixed a bug where the saved chart bins were not being restored upon opening an existing project.

Version 3.00.77 [8/4/2025] (Beta 2)

1. Fixed a bug that could happen when moving a Note on the chart, where the note could be positioned farther to the right than the dragging rectangle indicated.

2. Changed the default size of the chart window to be more appropriate for larger screens. This change only affects first time users.

3. Made adjustments to the SHR lines and labels.

4. Made more changes to the registration program.

Version 3.00.69 [7/16/2025] (Beta 2)

1. Made changes to the registration program.

Version 3.00.67 [7/10/2025] (Beta 2)

1. Fixed a problem where some of the SHR lines did not show if the highest dry bulb temperature of the chart was under 120 degrees F.

2. Made even more modifications to the chart height and the space below the chart.

Version 3.00.64 [7/7/2025] (Beta 2)

1. Made more modifications to the chart height and the space below the chart.

Version 3.00.62 [7/1/2025] (TEST VERSION)

1. Modified the chart so that its boundaries are better for various screen settings.

Version 3.00.59 [6/26/2025] (TEST VERSION)

1. Fixed a bug where the Chart Bins window would not open.

2. Fixed a bug where the chart bin hours per bin were not being saved with the project.

3. Added more sample projects.

4. Fixed a bug where if the Chart Bins window was open and you then opened a project that has chart bins on the chart, the Chart Bins window did not automatically select the city used to create the bins.

Version 3.00.51 [6/23/2025] (TEST VERSION)

1. On the Import Points tab of the Point Groups window, made it so if you enter zero for the "Starting number" input, the names of the points created will not have a numeral added as the suffix. Also added a dropdown help list item to let you select zero as the value.

2. On the CSV File Grid tab of the Point Groups window, fixed a bug where the Save Grid to File button did not include the fixed header row in the saved file.

3. Added a Keep Aspect Ratio feature that will keep the width to height ratio of the chart the same regardless of the width and height of the containing window. This feature can be adjusted or turned off on the General tab of the Chart Properties window.

4. Added more coordinate lines and labels to the chart. These lines include dew point, vapor pressure, and sensible heat ratio.

5. On the General tab of the Chart Properties window, added an option to show vapor pressure units as psi or in.Hg.

6. On the General tab of the Chart Properties window, added an option to show the center point of the sensible heat ratio lines. That point is defined as 75 F dry bulb (or metric equivalent) and 50% relative humidity.

7. Added a Chart Bins window, which lets you add bin rectangles with various colors to the chart that represent the number of hours that occurred in each bin the selected city. The weather data for about 3,000 cities throughout the world can be downloaded. A legend can be shown on the chart for the number of hours each of the bin colors represents.

Version 3.00.41 [1/31/2025] (Beta 1)

1. Added beta text to the about box and splash window.

Version 3.00.40 [1/29/2025] (TEST VERSION)

1. Made changes to the registration window.

Version 3.00.39 [1/28/2025] (TEST VERSION)

1. Made changes to the registration window.

Version 3.00.38 [1/13/2025] (TEST VERSION)

1. Made changes to the registration window.

Version 3.00.36 [12/18/2024] (TEST VERSION)

1. Made changes to the registration window.

Version 3.00.34 [12/3/2024] (TEST VERSION)

1. Fixed a bug on the Chart Properties window, where if you changed the Humidity Units option from fraction to grains or kg, and you also entered a grains or kg value in the Maximum W (humidity) input, the chart would go to a higher value of maximum humidity than you entered.

2. Made it so when you change the Units input on the Chart Properties dialog, the following values are automatically changed to their equivalent values in the new units: Minimum DB, Maximum DB, Maximum W, Elevation, and Pressure.

3. Made it so when you change the Humidity Units option on the Chart Properties dialog, the Maximum W input value automatically changes to the equivalent value in the new humidity units.

Version 3.00.33 [11/19/2024] (TEST VERSION)

1. On the Point Groups window, removed the radio buttons for selecting whether to use a CSV filename or enter points manually. Also made it so you can both use a CSV filename and enter points manually on the CSV File Grid after loading the CSV file.

Version 3.00.32 [11/15/2024] (TEST VERSION)

1. Made some technical changes on the registration window.

Version 3.00.30 [11/5/2024] (TEST VERSION)

1. Fixed a bug on the Point Groups window, where the help window did not always go to the correct topic after pressing F1.

2. Changed the "Add" button on the Point Groups window to "Create."

Version 3.00.29 [11/1/2024] (TEST VERSION)

1. Fixed a bug on the Manage Point Groups tab of the Point Groups window, where if you selected only one point in the Points Not in Group list, and then clicked Add Points to Group, the program would lock up.

2. Renamed the tabs on the Point Groups window.

Version 3.00.26 [10/29/2024] (TEST VERSION)

1. Fixed a bug where if you created multiple charts in a project, and added point groups to one or more of the charts, and switched to another chart while the Point Groups window was open, that window would not properly update the data on the Manage Point Groups tab.

2. Added more sample projects and modified the example CSV files for importing into the Point Groups window.

3. Made it so in a project with multiple charts, the Previous Chart and Next Chart buttons are both always enabled. Also made it so if you click the Previous Chart button while on chart 1, the current chart becomes the last chart. If you click Next Chart while on the last chart, the current chart becomes the first chart.

4. Made it so the Page Up key is a shortcut for the Previous Chart button, and the Page Down key is a shortcut for the Next Chart button.

Version 3.00.17 [10/24/2024] (TEST VERSION)

1. Changed the new Import Points window to the Point Groups window, which allows you to create multiple points, import multiple points, and assign points to a point group. When you assign points to a point group, you may then have lines connect the points together, change the point color and size, etc.

Version 3.00.7 [9/26/2024] (TEST VERSION)

1. Added an Import Points window, which is available in the main toolbar and the Chart menu. This window lets you import state point data from a CSV file to add points to the chart. The CSV file can have multiple formats, since it allows you to map CSV column headers to coordinate types (DB, RH, etc.).

Version 3.00.5 [9/16/2024] (TEST VERSION)

1. Made changes to the registration code to prevent trying to communicate with the server if the program license is at the demonstration level. Also made it check to see whether or not a connection can be made to the server before attempting to communicate with it.

2. Added a few more sample projects.

3. Made it so existing an existing PsyChart 2 can notify you of version 3.

Version 3.00.1 [9/13/2024] (TEST VERSION)

1. Added the ability to zoom in and out with the mousewheel. Roll the wheel toward the screen to zoom in to a part of the chart, and roll it away from the screen to zoom out.

2. Added the ability to pan the chart whenever it is zoomed in more than 100% by pressing down on the mousewheel and dragging the mouse in any direction.

3. Added a Custom Zones tab to the Chart Properties window, which lets you define one or more bounded areas of the chart.