PSYCHOMETRIC ANALYSIS PROFESSIONAL EDITION USER MANUAL

HDPsyChart - Psychrometric Analysis Professional Edition User Manual
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Version 7
Released Aug-2011

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TABLE OF CONTENTS
PROGRAM FEATURES
NEW VERSION 7 FEATURES!
OTHER PROFESSIONAL EDITION FEATURES
VERSION AND RELEASE HISTORY
VERSION 7 – RELEASE DATE AND FEATURE SUMMARY
PROGRAM SUPPORT
TECHNICAL SUPPORT
CONTACT US
REGISTRATION (REQUIRED FOR VERSION 6 AND HIGHER)
MENU & TOOLBARS
MENU & TOOLBARS
CUSTOM USER-DEFINED MENU TOOLBAR CONTROL
PRESENTATION SETTINGS
IP OR SI UNIT CONTROL
CHART AND REPORT LANGUAGE CONTROL
PAGE SETUP CONTROL
CHART AXIS RANGE CONTROL
CUSTOM ALTITUDE AND/OR PRESSURE CONTROL
CHART LINE ON/OFF CONTROL
HUMIDITY RATIO UNIT OF MEASURE CONTROL
PROCESS LINE AND STATE POINT COLOR & SIZE CONTROL
SUMMER & WINTER COMFORT ZONE CONTROL
PAPER AND CHART AREA COLOR CONTROL
DATA PROCESSING ENVIRONMENT AREA DISPLAY CONTROL
COLOR OR B&W CHART CONTROL
MOUSE POINTER CONTROL
PSYCHROMETRIC ANALYSIS
STATE POINTS & PROCESS ANALYSIS
CONSTANT LINE CONTROL
WEATHER DATA PRESENTATION CONTROL
COIL LEAVING AIR CALCULATOR
AIR COLLECTION CALCULATOR
SENSIBLE HEAT RATIO LINE PLOTTING
DELTA-h/DELTA-W LINE PLOTTING
NOTE CONTROLS
CHART NOTES
PROJECT INFORMATION NOTE
USER INFORMATION NOTE
NOTE ON/OFF CONTROL
VIEW CONTROLS
ZOOMING AND PANNING

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ZOOM WINDOW
REPORTS
PRINT ALL
PRINT CHART
PRINT REPORT
PRINT FLOWCHART
DATA EXCHANGE
EXPORTING / COPYING CHART
EXPORTING / COPYING REPORT
EXPORTING / CREATING CHART PDF
EPORTING / CREATING REPORT PDF
EXPORT / COPYING FLOW CHART
EXPORTING / COPYING REPORT DATA
IMPORTING DATA
TOOLBOX PROGRAMS
CLIMATIC DATA
PSYCHROMETRIC CALCULATOR
OUTSIDE AIR ESTIMATOR
STEAM PROPERTY CALCULATOR
MOTOR HEAT CALCULATOR
UNIT OF MEASURE CONVERSION CALCULATOR
DUCT DESIGNER CALCULATOR
FAN LAW CALCULATOR
WIND CHILL CALCULATOR
THERMAL COMFORT CALCULATOR
SINGLE & DOUBLE INTERPOLATION – EXTRAPOLATION CALCULATOR
FINANCIAL LOAN CALCULATOR
WEATHER TERM GLOSSARY REFERENCE
EXAMPLE PROCESSES
EXAMPLE 1: Moist Air Sensible Heating
EXAMPLE 2: Moist Air Cooling and Dehumidification
EXAMPLE 3: Moist Air Cooling and Dehumidification below freezing
EXAMPLE 4: Adiabatic Mixing of Two Moist Airstreams
EXAMPLE 5: Adiabatic Mixing of Water Injected into Moist Air
TERMINOLOGY
PSYCHROMETRIC TERM DEFINITIONS
ALGORITHMS
PSYCHROMETRIC ALGORITHMS
LEGAL NOTICES
LICENSE INFORMATION
DISCLAIMER OF WARRANTIES

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PROGRAM FEATURES
NEW VERSION 7 FEATURES!
NEW!! Updated ASHRAE Datacenter Zones to 2011 Thermal Guidelines!!
Now with ASHRAE Class A1, Class A2, Class A3, Class A4, Class B & Class C!

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NEW !! Updated ASHRAE 2010 Comfort Zones!!
Now with the new ASHRAE 2010 Comfort Zone plotting capability!!
NEW !! Re-arrange or Re-order Points on the Fly with One Button Click!!
Now You Can Re-arrange or Re-order Points on the Fly with One Button Click!!

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NEW !! TMY2 & TMY3 Bin Weather USA Locations Added!!
TMY2 & TMY3 Bin Weather USA Locations Added!!
NEW !! Ability to Select Days Per Week for Bin Weather Data & Plots!!
Ability to Select Days Per Week for Bin Weather Data & Plots!!

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NEW !! World-Wide Climatic Data Updated to 2009 ASHRAE Fundamentals!!
World-Wide Climatic Data Updated to 2009 ASHRAE Fundamentals!!
NEW !! Import Your Own Weather Data File Locations into the Chart!!
Import Your Own Weather Data File Locations into the Chart!!

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NEW !! Optional Process Directional Arrowheads on Process Lines!!
Optional Process Directional Arrowheads on Process Lines!!
NEW !! Ability to Print-All or PDF-All (Psy+Flow+Report) into ONE File!!
Ability to Print-All or PDF-All (Psy+Flow+Report) into ONE File!!

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NEW !! Cooling Coil Apparatus Dew Point (ADP) Calculator!!
Cooling Coil Apparatus Dew Point (ADP) Calculator!!
NEW !! Cooling Coil Air Bypass Factor (ABF) Calculator!!
Cooling Coil Air Bypass Factor (ABF) Calculator!!
NEW !! User Program Quantity Expanded from 15 to 25 Programs!!
User Program Quantity Expanded from 15 to 25 Programs!!

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NEW !! Evaporative Cooling Detailed Performance Calculator!!
Evaporative Cooling Detailed Performance Calculator!!
NEW !! Electric Heater Detailed Performance Calculator!!
Electric Heater Detailed Performance Calculator!!

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NEW !! Indoor Pool & Spa Evaporation Calculator!!
Indoor Pool & Spa Evaporation Calculator!!
NEW !! SMACNA Air Leak Class Calculator!!
SMACNA Air Leak Class Calculator!!

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NEW !! Center of Gravity - Corner Load Calculator!!
Center of Gravity - Corner Load Calculator!!
NEW !! Pump Law Calculator!!
Pump Law Calculator!!

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NEW !! Complete Inter-Active Element Periodic Chart!!
Complete Inter-Active Element Periodic Chart!!
NEW !! System Efficiency COP-EER-kW/ton Calculator!!
System Efficiency COP-EER-kW/ton Calculator!!

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NEW !! Total & Sensible Wheel Energy Recovery Performance Calculator!!
Total & Sensible Wheel Energy Recovery Performance Calculator!!
NEW !! Plate Heat Exchanger Energy Recovery Performance Calculator!!
Plate Heat Exchanger Energy Recovery Performance Calculator!!

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NEW !! Fluid & Mixture Thermo-Physical Property Calculator!!
Fluid & Mixture Thermo-Physical Property Calculator!!
NEW !! Rectangle & Round Duct Fittings added to HDDuctDesigner!!
Rectangle & Round Duct Fittings added to HDDuctDesigner!!

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NEW !! Duct Temp Gain/Loss Calculator added to HDDuctDesigner!!
Duct Temp Gain/Loss Calculator added to HDDuctDesigner!!
NEW !! Duct Pitot Airflow Calculator added to HDDuctDesigner!!
Duct Pitot Airflow Calculator added to HDDuctDesigner!!

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NEW !! Ability to Turn Logo On & Off, for ASHRAE Meeting “Generic”
Presentations!!
Ability to Turn Logo On & Off, for ASHRAE Meeting “Generic” Presentations!!
NEW !! Customize Psychrometric Charts with your own Colors!!
Customize Psychrometric Charts with your own Colors!!

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NEW !! Change Any Chart Property Lines to Any COLOR You Choose!!
Change Any Chart Property Lines to Any COLOR You Choose!!
NEW !! Change Any Chart Property Lines to Any Line TYPE You Choose!!
Change Any Chart Property Lines to Any Line TYPE You Choose!!
NEW !! Change Any Chart Property Lines to Any Line THICKNESS You Choose!!
Change Any Chart Property Lines to Any Line THICKNESS You Choose!!
NEW !! Improved Toolbar and Menu Control Setup!!
Improved Toolbar and Menu Control Setup!!

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NEW !! User-Defined Custom Area Shading right on the Chart!!
User-Defined Custom Area Shading right on the Chart!!
NEW !! Ability to Hide State Point Label on a Point-By-Point basis!!
Ability to Hide State Point Label on a Point-By-Point basis!!

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NEW !! Draw Your Own Lines Anywhere You Want!!
Draw Your Own Lines Anywhere You Want!!
NEW !! Draw Your Own Ellipses Anywhere You Want!!
Draw Your Own Ellipses Anywhere You Want!!

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NEW !! Draw Your Own Rectangles Anywhere You Want!!
Draw Your Own Rectangles Anywhere You Want!!
NEW !! Draw Your Own Circles Anywhere You Want!!
Draw Your Own Circles Anywhere You Want!!

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NEW !! Insert Your Own Pictures Anywhere You Want!!
Insert Your Own Pictures Anywhere You Want!!
NEW !! Languages, Now with (19) Different Languages on Charts and Reports
with one button click!!
Languages, Now with (19) Different Languages on Charts and Reports with one button click!!

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NEW !! Point Color Control when Importing Data from Excel (*.csv) files!!
Point Color Control when Importing Data from Excel (*.csv) files!!
NEW !! Point Size Control when Importing Data from Excel (*.csv) files!!
Point Size Control when Importing Data from Excel (*.csv) files!!
NEW !! Process Line Color Control when Importing Data from Excel (*.csv) files!!
Process Line Color Control when Importing Data from Excel (*.csv) files!!
NEW !! Process Line Width Control when Importing Data from Excel (*.csv) files!!
Process Line Width Control when Importing Data from Excel (*.csv) files!!

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NEW !! Point property toolbar display now includes units of measure!!
Point property toolbar display now includes units of measure!!

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NEW !! Thermal Comfort Terms Definition PDF Manual!!
Thermal Comfort Terms Definition PDF Manual!!

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PROGRAM FEATURES
MORE PROFESSIONAL EDITION FEATURES!
Auto Flow Chart Diagram!
Now you can get a Complete Flow Diagram Schematic with all Process and Thermo-Physical
properties with One-Button-Click! Flow diagram and/or data can be copied with One-Button-Click to
the clipboard for pasting into your reports and presentations!

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Weather Data Plotting with Complete Global Weather Files!!
Now you can see the weather data plotted right on the chart with one click!!

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Weather Bin Shade Plotting with Complete Control!!
Now you can display Bin Weather data right on the chart and specify the bin size and colors!!...even
displays a bin legend that you can locate where you want!!

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Global Weather Data Table Access!!...CREATE YOUR OWN BIN TABLES!!
Now you have access to world-wide weather data at your fingertips!!...create a complete weather
data file that you can modify, import to Excel, etc. with One-Click!!
Mouse Icon Control!!
Now you can change the mouse icon to Arrow, Target or Cross-Hair!!
Cross-Hair Mouse (just like CAD!!) Or Target Style!!

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Individual Process Line Color Control!
Now you can control the color and thickness of EACH Individual Process Line!!
Individual Point Color, Shape and Size Control!
Now you can control the icon, color and size of EACH Individual State Point!!

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Winter "V" Air Mixing Capability!
Now you can plot mixing processes that cross the saturation line!!
Fog Region Property Display!!
Now you can read fog region properties!!

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Humidity Ratio Unit of Measure Control!!
Now you can select the Humidity Ratio units displayed on the chart and used in Psychrometric
Analysis with one button click!!
Constant h, WB, HR, DB, VP, DP, SHR & dW/dh Line Control!!
Now you can specify exact individual property lines to be displayed!!

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Complete Thermal Comfort Calculator!!
Now you can perform thermal comfort modeling calculations on the fly!!

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ASHRAE Class 1 through 4 Datacenter Zones (allowed & recommended) and NEBS Datacenter
Zones (allowed & recommended)!!
Now you can display the Data Processing Environment regions right on the psychrometric
chart!!!...the regions are calculated and are displayed dynamically with elevation!!!

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Process Control added to Data Import Function!!
Now when you’re importing data text or Excel spreadsheet data, you can specify processes with the
data!!

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SI units added to text file & Excel Data Exchange!!
Now when you’re exporting data text or Excel spreadsheet data, you can export out in SI units of
measure!!
Export Data in EITHER *.txt format or *.csv format!!
Now you can export your psychrometric analysis data in either text file (*.txt) format or an Excel
friendly comma delimited format (*.csv) for easy data exchange!!

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Outdoor Air Estimator UPDATED to Standard 62-2004!!
Now you can quickly and easily obtain updated values from Table-16 from ASHRAE Standard 62-
2004 with associated Notes and Air Classifications!!
Weather Term Glossary!!
Now you can quickly and easily look up any almost any weather term or phrase in seconds!!

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Wind Chill Factor Calculator!!
Now you wind chill and frost bite times are at your fingertips and can be calculated in seconds!!
Climatic Data PRINTING Capability Added!!
Instead of just viewing design data or adding it to your psychrometric system, now you can print all
the design data for your location as well!!

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Cooling Coil Performance Line Control!!
Now you can display cooling coil modeled curves right on the psychrometric chart!!
Greek, Japanese and Dutch Languages Added!!
Now Psychrometric Analysis supports (13) Languages!!

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Page and Chart Area Color Control!!
Now you can customize the appearance of the psychrometric chart and select virtually any color for
the page and chart area!!

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Black & White <=> Color Display & Print Control!!
Now you can select Black and White only or Color display!!
Heading On/Off Control!!
Now you can turn Headings On or Off!!

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Psychrometric Chart Outline Control!!
Now you can turn the Chart Outline On or Off!!
Zoom Window Control!!
Now you can Zoom using a Window to specify where you want to Zoom!!

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Ability to add user defined "ToolBox" Programs under menu item tools!!
Now you can ADD your other Engineering Tools to the Psychrometric Analysis menu so you can
access them easily and quickly!!

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Single & Double Interpolation and Extrapolation Calculator!!
Now single and even double Interpolation and Extrapolation is performed easily and quickly!!
Fan Law Calculator!!
Now when you’re estimating fan motor heat for an unknown condition, you can quickly calculate the
new power and heat required!!

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Duct Sizing Calculator!!
Now when you need to estimate duct design static pressures for fan performance, required motor
power and motor heat, you can use this tool to quickly determine duct pressure drops!!

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Financial Loan / Payment Calculator!!
Great for when you need to quickly estimate a payment or generate an amortization table!

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Complete State Point & Process Report!!
Complete state point and process report with the ability to copy EITHER the report IMAGE or the
DATA to the clipboard so you can paste it right into your proposals, presentations or the data into
spreadsheets!!

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Complete Project Information & Note Control!!
Complete project information and note capabilities!! Notes are individually controlled allowing for font,
color, border, background, etc to all be specific to each note. Complete Drag-n-drop functionality as
well as new-edit-delete note management!!
Complete User Data Control for Reports and Graphs!!
User information and auto note display capability!! User information is added only once and is
automatically available for displaying on both the chart and/or the state point and process report!!

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Complete Chart Presentation Control!!
Complete Chart control including virtually any Altitude or Pressure, Dry-Bulb and Humidity Ratio Axis
Limit Control, turning Lines ON & OFF, Process line color and width, state point icon and size, state
point label font control, Comfort & Data Center Zones, Page Setup and more!!

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Sensible Heat Ratio Line Plotting!!
Sensible Heat Ratio Line Plotting is available with one simple button click!! Type the desired SHR
and click the button and instantly, the requested SHR line is displayed on the chart!!
Humidification Delta-Enthalpy / Delta-Humidity Ratio Line Plotting!!
Humidification Delta-Enthalpy / Delta-Humidity Ratio Line Plotting is available with one simple
button click!! Steam Flow rate is automatically calculated based on desired Final Dew Point
Temperature!!

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Complete State-Point and System Process Analysis Control!!
Complete State-Point and System Process Analysis capable. Process modeling includes AIR
MIXING, COOLING COIL, EVAPORATIVE COOLING, DESICCANT DEHUMIDIFICATION,
HUMIDIFICATION and SENSIBLE HEATING & COOLING!! All processes can either have END
POINT specified, CALCULATING PROCESS DATA or PROCESS DATA specified, CALCULATING
END POINT result!

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Complete IP & SI Unit of Measure Control with ONE Button Click!!
All Charts, state-points and process data are converted automatically between IP and/or SI with the
click of a button!!
Save Charts and Report as PDF Files that can be easily shared or emailed!!
Ability to export chart and reports out in PDF format automatically!!
Select any of (10) Different Languages for Charts and Reports!!
Automatically convert between (10) different Languages just by Clicking a button!!

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Easy-to-Use Right-Click Pop-Up Menu Control!!
Right-Click Pop-Up menus allow for easy control of the chart whether it's moving state-point labels
or managing chart notes!! Left Double-Click automatically ZOOMS-IN and Right Double-Click
automatically ZOOMS-OUT. Hold the left buttom down and Drag allows you FULL PANNING of the
chart!!
Complete Stand Alone Psychrometric Property Calculator!!
Complete Psychrometric Calculator with File-Open-Save capabilities and outputs in either IP or SI
units!!

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Complete World-Wide Climatic Outside Air Design Data!!
Complete Climatic Outside Air Design Data for over 1,000 cities throughout the WORLD for either
IP or SI units!!

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Cooling Coil Design Calculator!!
Complete Cooling Coil Leaving air condition calculator!!! Automatically calculate the Leaving air
temperature or the airflow for cooling coils!!

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Complete Air Collection Calculator!!
Integral Air Collection Calculator!! Simply click on the combo box drop downs and select the state
points desired for collection, and with one “Calculate =>’ button click, your system collection point is
automatically displayed, available to be added to your system, chart and report!!

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Stand Alone Universal Unit of Measure Conversion Calculator!!
Complete unit of conversion calculator for quick and easy IP<>SI unit conversions!!

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Complete Data Exchange Capabilities with Microsoft Excel, Word, etc!!
Complete Data Exchange Capabilities!! You can export data, charts and reports either by Edit-Copy
copying to the clip board, or by automatically exporting out to a PDF file!!
Importing of Data is accomplished with comma delimited “.csv” files which can easily be generated
with any text editor or spreadsheet program such as Microsoft Excel!!!

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Motor Heat Calculator!!
Motor heat calculation is one button click away!! Simply type in the motor size (power) and the
efficiency and instantly get the resulting sensible heat generated by the motor along with the
corresponding temperature rise!!
Steam Property Calculator!!
Complete Steam Property Calculator in both IP and SI units of measure!!!

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VERSION AND RELEASE HISTORY
VERSION 7 – NEW FEATURES (Release Aug-2011)
NEW PROCESS ANALYSIS CAPABILITIES
- NEW! Updated ASHRAE Datacenter Zones to 2011 Thermal Guidelines!
- NEW! Updated ASHRAE 2010 Comfort Zones!
- NEW! Re-arrange or Re-order Points on the Fly with One Button Click!
- NEW! TMY2 & TMY3 Bin Weather USA Locations Added!
- NEW! Ability to Select Days Per Week for Bin Weather Data & Plots!
- NEW! HDClimatic Updated to 2009 ASHRAE Fundamentals!
- NEW! Import Your Own Weather Data File Locations into the Chart!
- NEW! Optional Process Directional Arrowheads on Process Lines!
- NEW! Ability to Print-All or PDF-All (Psy+Flow+Report) into ONE File!
- NEW! Cooling Coil Apparatus Dew Point (ADP) Calculator!
- NEW! Cooling Coil Air Bypass Factor (ABF) Calculator!
- NEW! Improved Air Mixing Algorithm with both Mass and Energy Balance!
- NEW! User Program Quantity Expanded from 15 to 25 Programs!
NEW TOOLS
- NEW! Evaporative Cooling Detailed Performance Calculator!
- NEW! Electric Heater Detailed Performance Calculator!
- NEW! Indoor Pool Evaporation Calculator!
- NEW! SMACNA Air Leak Class Calculator!
- NEW! Center of Gravity - Corner Load Calculator!
- NEW! Pump Law Calculator!
- NEW! Complete Inter-Active Element Periodic Chart!
- NEW! System Efficiency COP-EER-kW/ton Calculator!
- NEW! Total & Sensible Wheel Energy Recovery Performance Calculator!
- NEW! Plate Heat Exchanger Energy Recovery Performance Calculator!
- NEW! Fluid & Mixture Thermo-Physical Property Calculator!
- NEW! Rectangle & Round Duct Fittings added to HDDuctDesigner!
- NEW! Duct Temp Gain/Loss Calculator added to HDDuctDesigner!
- NEW! Duct Pitot Airflow Calculator added to HDDuctDesigner!
NEW PRESENTATION CONTROL
- NEW! Ability to Turn Logo On & Off, for ASHRAE Meeting “Generic” Presentations!
- NEW! Customize Psychrometric Charts with your own Colors!

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- NEW! Change Any Chart Property Lines to Any COLOR You Choose!
- NEW! Change Any Chart Property Lines to Any Line TYPE You Choose!
- NEW! Change Any Chart Property Lines to Any Line THICKNESS You Choose!
- NEW! Improved Toolbar and Menu Control Setup!
- NEW! User-Defined Custom Area Shading right on the Chart!
- NEW! Updated ASHRAE 2010 Comfort Zones!
- NEW! Optional Process Directional Arrowheads on Process Lines!
- NEW! Ability to Hide State Point Label on a Point-By-Point basis!!
- NEW! Draw Your Own Lines Anywhere You Want!
- NEW! Draw Your Own Ellipses Anywhere You Want!
- NEW! Draw Your Own Rectangles Anywhere You Want!
- NEW! Draw Your Own Circles Anywhere You Want!
- NEW! Insert Your Own Pictures Anywhere You Want!
NEW LANGUAGES
- NEW! Languages, Now with (19) Different Languages on Charts and Reports with one
button click!
- NEW! Croatia Language!
- NEW! Czech Language!
- NEW! Finish Language!
- NEW! Latin Language!
- NEW! Polish Language!
- NEW! Turkish Language!
NEW DATA EXCHANGE
- NEW Point Color Control when Importing Data from Excel (*.csv) files!
- NEW Point Size Control when Importing Data from Excel (*.csv) files!
- NEW Process Line Color Control when Importing Data from Excel (*.csv) files!
- NEW Process Line Thickness Control when Importing Data from Excel (*.csv) files!
- NEW! Import Your Own Weather Data File Locations into the Chart!
NEW NOTES
- NEW! Improved Note Controls!
GENERAL IMPROVEMENTS
- NEW! Added Apparatus Dew Point (ADP) to Cooling Coil Leaving Air Calculator!
- NEW! Added Air Bypass Factor (ABF) to Cooling Coil Leaving Air Calculator!
- NEW! Point property toolbar display now includes units of measure!
- NEW! Thermal Comfort Terms Definition PDF Manual!
- NEW! Improved Air Density Property Calculation!

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- NEW! Many minor bugs and improvements implemented!
VERSION 6 – NEW FEATURES (Release Jan-2007)
- New Auto Flow Chart Diagram
- New Individual Process Line Color Control
- New Individual Point Color, Shape and Size Control
- New Winter "V" Air Mixing Capability with Condensation
- New Fog Region Property Display
- Constant h, WB, HR, DB Line Control
NEW TOOLS
- New Complete Thermal Comfort Calculator
- New Weather Data Plotting with Complete Global Weather Files
- New Weather Bin Shade Plotting with Complete Control
- New Global Weather Data Table Access
- New Weather Term Glossary
- New Wind Chill Factor Calculator
- New Climatic Data Printing Capability Added
- New Outside Air Estimator UPDATED to ASHRAE Standard 62-2004
- New Humidity Ratio Unit of Measure Control
- New Mouse Cross-Hair (Like CAD!!) or Target Control
- New Cooling Coil Performance Line Control
- New Page Color Control
- New Chart Area Color Control
- New ASHRAE Class 1 through 4 Datacenter Zones (allowed & recommended)
- New NEBS Datacenter Zones (allowed & recommended)
- New Black & White <=> Color Display & Print Control
- New Heading On/Off Control
- New Outline On/Off Control
- New Zoom Window Control
NEW TOOLBOX ANALYSIS
- New Ability to add user defined "ToolBox" Programs under menu item tools
- New Single & Double Interpolation Calculator
- New Fan Law Calculator
- New Duct Sizing Calculator
- New Loan Calculator
NEW ADDITIONAL CAPABILITIES
- New High Pressure Capability up to 100 PSI
- New Auto-Altitude Change with Climatic Location Selection
- New Fog Region Thermo-Physical Property Display
NEW LANGUAGES
- Now with (13) Different Languages on Charts and Reports with one button click
- New Greek Language
- New Japanese Language
- New Dutch Language

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- Improved Italian Language Updated
NEW DATA EXCHANGE
- New REAL-TIME Data Monitoring Capability
- New Process Control added to Data Import Function
- New Complete Weather Data Export to Excel or Text File
- SI units added to text file & Excel Data Exchange
- New Export-As Excel *.csv File
- New Export-As Notepad *.txt File
NEW NOTES
- Improved Note Control Update
VERSION 5 – FEATURES (Release Jan-2005)
- New Custom Axis Range Control
- New Chart Altitude or Pressure Control
- New Lines ON/OFF Control
- New Process Line Color & Width Control
- New State Point Icon, Size Control, Color & Label Control
- New Comfort Zone Area Plotting
- New User information Saved/Displayed on Charts & Reports
- New Page Setup Control
- New Sensible Heat Ratio Line Plotting
- New Humidification Delta-Enthalpy / Delta-Humidity Ratio Line Plotting
- New Partial Mixing of Airstreams Allows for Component Mixing Bypass
- New Cooling Coil Leaving Air Calculator / Auto-Plotting
- New Organized Toolbar Menu Setup
NEW TOOLS
- New Air Collection Calculator with Auto-Plotting
- New Integral IP<=>SI Unit of Measure Calculator
- New Fresh Air Estimator Updated to 62-2001
- New Motor Heat Calculator
- New Steam Property Calculator
- New Easy Auto-Create / Export PDF Files of Charts & Reports
NEW LANGUAGES
- Now (10) Languages including CHINESE
NEW DATA EXCHANGE
- New Complete Data Exchange Capabilities
NEW NOTES
- New Add/Edit/Delete Note Control with Drag-Drop Positioning
- New Project Information Control Displayed on Chart & Report

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VERSION 4 – FEATURES (Release Jan-2003)
- New State Point and Process Report
- New Universal IP <=> SI Unit Control
- New Air Mixing Process
- New Cooling Coil Process (with REAL Cooling Coil Curves!)
- New Desiccant Dehumidification Process
- New Sensible Heating Process
- New Heating & Humidification Process
- New Evaporative Cooling Process
- New Sensible Only Cooling Process
NEW TOOLS
- New Stand Alone Psychrometric Calculator
- New Stand Alone World-Wide Climatic Data
- New Stand Alone Outside Air Calculator based on ASHRAE Standard 62-89
- New State Point Label Positioning Control
- New Zoom & Pan Control
- New Mouse-Move Thermo-Physical Property Display
NEW LANGUAGES
- New (7) Different Languages on Charts & Reports with one-button click
NEW DATA EXCHANGE
- New Ability to Copy Chart to Clipboard
- New Ability to Copy Report to Clipboard

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PROGRAM SUPPORT
Technical Support
Technical support is free of charge and available by fax, mail, email and through our World Wide
Web site.
It is our policy to respond to all inquires within 48 hours from receipt.
Please include Version number found in the “About” box under the Help menu with your inquiry.
Email: support@handsdownsoftware.com
Phone: 405.844.6314
Fax: 405.844.6314
Write: Hands Down Software
1108 Olde Bridge Road
Edmond, OK 73034
USA
Web: http://www.handsdownsoftware.com
Contact Us
HANDS DOWN SOFTWARE
1108 Olde Bridge Road
Edmond, OK 73034
USA
Off: 405.844.6314
Fax: 405.844.6314
Email: info@handsdownsoftware.com
OFFICE HOURS
8:00 am - 5:00 pm Central Standard Time
Monday through Friday
HOLIDAYS
New Year's Day
Memorial Day
July 4th
Labor Day
Thanksgiving
Christmas

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V7 Registration
Version 7 requires a registration code for EACH Seat, (1) Seat is licensed per CD, unless you have
purchased a site license.
General Registration
When you register as a User of this program, your contact information is included in email notification
broadcasts of Corrective Patches, New Features, New Versions, Tips, etc., everything you need to
stay current.

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MENUS AND TOOLBARS
Menus and Toolbars
You can access the Psychrometric Analysis services via a standard Windows menu and tool bar
system. Each component of the system can be dragged and docked to the top, bottom, left or right
sides of the Psychrometric Chart Window, or can become floating menus positioned anywhere
within the Psychrometric Window.

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In addition to accessing these services, a constant display of the
mouse position in psychrometric property terms is available at all
times. The values are displayed in a button bar that can be docked or
floating just as the Psychrometric Analysis’s other button bars. See
the graphic to the left. Let the mouse pointer hover over a value for
just a couple of seconds and the engineering units for that value are
displayed. The values can be configured for your own needs via the
button bar customize option as described above.
Custom User-Defined Menu Toolbars
To add your favorite engineering tools to the Psychrometric Analysis Menu Toolbars, simple click
User Programs => User Program Manager and provide a Program Name and locate the program
using the “Browse…” button.

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PRESENTATION SETTINGS
IP OR SI UNIT CONTROL
You can switch from IP to SI and back with one button click. All State Points and Processes are
dynamically recalculated on the fly!!
CHART & REPORT LANGUAGE CONTROL
Change your charts and reports to any of (13) different languages with one button click!!

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PAGE SETUP CONTROL
Complete page setup control supporting both IP and SI units of measure!
CHART AXIS RANGE CONTROL
Complete Dry-Bulb and Humidity Ratio Range Control!!

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ALTITUDE & PRESSURE CONTROL
Generate Charts and Perform Analysis at virtually any Altitude or Pressure!!
CHART LINE ON/OFF CONTROL
Improved and Enhanced Line Property and Feature On/Off Control!!
HUMIDITY RATIO UNIT CONTROL
Complete Humidity Ratio Unit of Measure Control!!

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PROCESS LINE & STATE POINT
COLOR & SIZE CONTROL
Now you can specify the colors, size, thickness and icons for each individual state point and process!!

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SUMMER & WINTER COMFORT ZONE
CONTROL
Seeing the Summer and Winter Comfort Zones is just a button click away, and you can format the
line color, weight and area fill color too!!

Page 74
PAPER & CHART AREA COLOR CONTROL
Specifying the chart area and paper area colors is a snap!!

Page 75
DATA PROCESSING ENVIRONMENT
AREA DISPLAY CONTROL
Take the mystery out of the ASHRAE Data Processing Environment Class Areas with one button
click!!!...Dynamically adjusts the areas based on altitude or pressure too!!

Page 76
COLOR OR B&W CHART CONTROL
Switch from Color to Black & White and back with just one button click!!!
MOUSE POINTER CONTROL
Simply click the icon on the toolbar to select the mouse tracking icon preference!!!

Page 77
PSYCHROMETRIC ANALYSIS
STATE POINT & PROCESS ANALYSIS
1. Activate "State Point and Processes" by any of the three methods shown below:

Page 78
2. The Psychrometric Processes window appears with blank data fields.

Page 79
3. To enter a new point, click the Add Point button. Fill in the grid information as needed (point
name, point label location, enter the airflow, select air flow units, select process and select given
option). If this is the first point, the only process offered is "Add State Point" since there are no
other points to create a process with. Click on the "Current Point" panel and enter dry bulb
temperature, enter moisture value and select moisture property from the drop-down box.

Page 80
4. Click on the Apply button and the point is plotted to the chart.

Page 81
5. Click the Add Point button again to continue adding new points. Adding more than one point
enables additional PROCESSES to be selected in the grid. The GIVEN column will also be
enabled, after the first point is entered, to allow entering either the end point (POINT), calculating
the process energy or entering the process energy (ENERGY) and calculating the end point. After
each successive point, click the Apply button to plot the point and process to the chart.
Additional processes can be added to complete any system. If you need to make changes you
may do so to any point by just clicking on the proper grid row, make any desired changes and
simply click "Apply" and the point and connecting processes are automatically updated.

Page 82
6. To apply a Climatic Data weather point to the chart, simply click on the Weather icon to access
the Climatic Data Window.

Page 83
7. Select the geographic location by country, state and city. Select the desired outside design
condition (for Summer Cooling: 0.4%, 1% or 2%) (for Winter Heating: 99.6% or 99%).

Page 84
8. To apply this design condition as a State Point, simply click the Apply button in the upper left
hand of the Window and then close the Climatic Data Window to return to State Points &
Processes.

Page 85
CONSTANT LINE CONTROL
Click the Constant Line Icon on the toolbar, select the line type and specifics, and click “Apply” to see
the specified line displayed on the chart!!

Page 86
WEATHER DATA PRESENTATION CONTROL
Simply click the Weather Icon on the toolbar and select the location, style and bins desired and with
one button click, you can SEE the weather data on the chart as data dots, colored bins or even
CREATE your OWN Bin Weather Table!!!

Page 87
COIL LEAVING AIR CALCULATOR
1. NOTE: You need to have the Room Zone state point and Coil state point created for reference
by the Coil Airflow/LAT Calculator BEFORE continuing.
2. Activate "Coil Airflow / LAT Calculator" by either of the two methods shown below:
3. The Coil Airflow / LAT Calculator window appears with blank data fields.

Page 88
4. Click the Room (Zone) and Coil combo box drop-downs and select the desired points that you’ve
already created with the State Point and Process dialog.
5. To calculate coil leaving airflow, click the “Dry-Bulb (use)” option.

Page 89
6. To calculate coil leaving dry-bulb, click the “Airflow (use)” option.
7. Click any two of the Load Data variables you wish to specify and input the appropriate values.

Page 90
8. Lastly, click “Calculate” to see the results.
9. To Update the Coil LAT point created with the calculated result, simply click “Apply” on the menu
and the point and chart are automatically updated.

Page 91
AIR COLLECTION CALCULATOR
1. NOTE: You need to have two or more points created BEFORE calculation of a collection point
can be performed.
2. Activate "Air Collection Calculator" by either of the two methods shown below:

Page 92
3. The Air Collection Calculator window appears with blank data fields.

Page 93
4. Click the Selected point combo box drop-downs to specify the points you wish to collect, then
click “Calculate =>” to see the Collection Point result.

Page 94
5. Type in the desired Point Label and click “Apply Point to Chart” to add the Collection Point to the
chart and report.

Page 95
SENSIBLE HEAT RATIO LINE PLOTTING
1. NOTE: You need to have at least ONE point created BEFORE calculation of a constant sensible
heat ratio line can be performed.
2. Activate "Sensible Heat Ratio Line Plot" by either of the two methods shown below:
3. The Sensible Heat Ratio Line window appears with blank data fields.

Page 96
4. Click the Start Point combo box drop-down to select a reference state point to plot through. Then
type in the desired sensible heat ratio in the space provided.
5. Click the “Plot SHR Line” and the SHR Line is automatically plotted across the chart.

Page 97
DELTA-h / DELTA-W LINE PLOTTING
1. NOTE: You need to have at least ONE point created BEFORE calculation of a constant delta-h /
delta-W line can be performed.
2. Activate "Delta-h / Delta-W Line Plot" by either of the two methods shown below:
3. The Delta-h / Delta-W Line window appears with blank data fields.

Page 98
4. Click the Start Point combo box drop-down to select the desired reference point and enter the
“Steam Temperature” or “dh/dW” values in the space provided. Please note that which ever value
isn’t provided, is automatically calculated real-time.

Page 99
5. Click the “Plot dh/dW Line” and the Delta-h/Delta-W Line is automatically plotted across the
chart.
6. Type the desired final Dew Point Temperature and click the “Calculate” button to see the
resulting Final Dry-Bulb Temperature and Steam Flow Rate.

Page 100
NOTE CONTROLS
CHART NOTES
1. Activate "Notes" by any of the three methods shown below or press 'F3':
2. The Notes window appears with New Note #1 as the current note.

Page 101
3. To create a new note, enter the desired note text in the "Note Text" field.
4. To edit an existing note, click the "Selected Note Name" drop-down and select the desired
existing Note to be edited from the list. Enter the "Note Text" field to make any text revisions.

Page 102
5. Adjust the font settings (Font Name, Font Size, Bold, Italic, Underline, Color) as desired.
6. Enter the Note X & Y location by either typing the X & Y coordinates in to the appropriate fields or
use the left mouse button and click once on the chart, move the mouse to see the coordinates
track the mouse location and when the mouse is at the desired location, perform a left mouse
button single click again to set the coordinates. See Above graphic.

Page 103
7. Click the "Apply" button and the note will appear on the chart:
8. The Note window remains open. To add additional notes, simply click the "New" button and
you’re ready to begin your next note.
9. Psychrometric Analysis allows an unlimited amount of notes to be entered. Each note can have
its own properties. All information is saved to the project file. The Notes window accepts the
information you want to place on the chart, allows font changes and provides a means to position
the information.
10. Enter your notes in the text box. Use any of the font buttons to adjust the settings. Set the
position by clicking on the chart or using the X and Y position settings provided in text box. Now
click "Apply" to add the project information to the chart.
11. You may want to change the position of the information on the chart after you see it. While the
Notes window is open you may do so by making a single click on the information and then another
single click at the new location. To edit the information, make the changes in the Notes window
and click "Apply".
12. You may edit this information, change its font or position at any time. Simply open the Notes
window and make the changes.

Page 104
PROJECT INFORMATION NOTE
1. Activate "Project Information" by any of the two methods shown below.
2. The Project Information window appears ready to receive the Project Name as the current note.
Please note that this note will appear on the state point reports as the Project Name.

Page 105
3. Type in the project name you wish, adjust fonts, location, etc. When finished, click the “Apply”
button to automatically place on the chart.

Page 106
USER INFORMATION NOTE
1. Activate "User Information" by either of the two methods shown below.
2. The User Information window appears as shown below:

Page 107
3. Type in your information in the space providing. Check the display options you wish to choose
for your default.
4. Click the “Save” button in the upper right hand corner. You may also click the “Add User Data to
Current Chart” button to have your user information displayed on the current chart.
NOTE ON/OFF CONTROL
Simply click the Note icon on the toolbar to turn Notes On/Off.

Page 108
VIEW CONTROLS
ZOOMING AND PANNING
Zoom IN
1. Click View on the menu bar, then click the Zoom In icon.
2. Click the Zoom In icon on the toolbar.
3. Enter the Zoom Percent into the zoom factor dropdown on the toolbar.
4. Move your mouse so the cursor is on the chart and Double-Click the LEFT mouse button.
Zoom OUT
1. Click View on the menu bar, then click the Zoom Out icon.
2. Click the Zoom Out icon on the toolbar.
3. Enter the Zoom Percent into the zoom factor dropdown on the toolbar.
4. Move your mouse so the cursor is on the chart and Double-Click the RIGHT mouse button.
Zoom ALL
1. Click View on the menu bar, then click the Zoom All icon.
2. Click the Zoom All icon on the toolbar.
3. Enter 100 into the zoom factor dropdown on the toolbar.

Page 109
Zoom MENU
1. Move your mouse so the cursor is on the chart and Single-Click the RIGHT mouse button and
click the Zoom action icon on the pop-up menu.
Panning
If you are ZOOMED IN on the chart, simply position your mouse on the chart and hold the LEFT
mouse button down and move your mouse. When you have panned to the desired position,
release the left mouse button.
Zoom WINDOW
Simply click the Zoom Window icon on the tool bar, then click the first corner of the window on the
chart, move the mouse and click the other window corner.

Page 110
REPORTS
PRINT ALL
There are four different choices when printing:
1. Print BOTH the Chart and Report. Click on the Print All icon on the toolbar.
PRINT CHART
2. Print ONLY the Chart. Click on the Print Chart icon on the toolbar.
PRINT REPORT
3. Print ONLY the Report. Click on the Print Report icon on the toolbar.

Page 111
4. Print Preview ONLY the Report. Click on the Report Print Preview icon on the toolbar.
PRINT FLOWCHART
Click the FlowChart icon on the toolbar, and then click the print icon on the flowchart window to print
the flowchart.

Page 112
DATA EXCHANGE
EXPORT/COPY CHART
From the menu, click on Edit, and then click Copy Chart Image. The psychrometric chart image is
automatically placed on your clipboard for you to paste into your reports, presentations, proposals,
etc.
EXPORT/COPY REPORT
From the toolbar, click the Report Print Preview icon.
Then from the toolbar on the Report Print Preview, click the Copy Report Data to Clipboard icon. The
complete state-point and process report image is automatically placed on your clipboard for you to
paste into your reports, presentations, proposals, etc.

Page 113
EXPORT/CREATE CHART PDF
1. Activate "Save Chart PDF As…" by either of the two methods shown below:
2. Navigate to where you want to save the file, type in the file name and click the “Save” button.

Page 114
EXPORT/COPY REPORT PDF
1. Activate "Save Report PDF As…" by either of the two methods shown below:
2. Navigate to where you want to save the file, type in the file name and click the “Save” button.

Page 115
EXPORT/COPY FLOWCHART
From the toolbar, click the Flow Chart icon.
Then from the toolbar on the Flow Chart, click the Copy Report Image to Clipboard icon. The
complete flow chart report image is automatically placed on your clipboard for you to paste into your
reports, presentations, spreadsheets, etc.

Page 116
EXPORT/COPY REPORT DATA
From the toolbar, click the Report Print Preview icon.
Then from the toolbar on the Report Print Preview, click the Copy Report Data to Clipboard icon. The
complete state-point and process report data is automatically placed on your clipboard for you to
paste into your reports, presentations, spreadsheets, etc.

Page 117
IMPORTING DATA
From the toolbar, click the Import Data File icon.
Then navigate to the “.csv” file with the data you wish to import. “.csv” file format is a comma
delimited file format, which is an export option for spreadsheet programs such as Microsoft Excel.
Then Click the “Open” button and the data points will be imported and displayed on the chart. Below
is an example shipped with this program:

Page 118
If using a Spreadsheet to create the “.csv” file, data points must be set up with the following structure:

Page 119
If using a text editor to create the “.csv” file, data points must be set up with the following structure:

Page 120
TOOLBOX PROGRAMS
CLIMATIC DATA
Climatic Data provides ambient design conditions for over 1,000 locations in either IP or SI units of
measure. Ambient data is from ASHRAE 1997 Fundamentals.

Page 121
PSYCHROMETRIC CALCULATOR
Complete stand-alone psychrometric calculator is one of the tools provided. This psychrometric
wonder has full File-Open-Save-SaveAs capabilities.
The program also has a data report for printing and the ability to copy all data points to the clipboard
so you can paste them into your reports or spreadsheets.

Page 122
OUTSIDE AIR ESTIMATOR
Complete stand-alone fresh air estimator is one of the tools provided. This tool has many of the
applications listed in ASHRAE Standard 62-2004.

Page 123
STEAM PROPERTY CALCULATOR
Complete steam property calculator is one of the tools provided. This tool provides complete thermo-
physical properties of steam for both IP & SI units of measure.
MOTOR HEAT CALCULATOR
Sensible Heat generated by motors in the air stream can now be easily calculated. This Motor Heat
Calculator is one of the tools provided. Simply input three variables and click calculate. Calculates
sensible heat and temperature rise for both IP & SI units of measure.

Page 124
UNIT CONVERSION CALCULATOR
Unit of Measure converter is one of the tools provided. Simply click on the unit category and then click
on the source and target units of measure and type in your value, resulting in real time conversion.
This tool also allows the user complete Category Tab Management, unit of measurement
management and conversion equation management.
DUCT DESIGNER CALCULATOR
This Duct Designer tool aids in the design of duct system and associated pressure drops.

Page 125
FAN LAW CALCULATOR
The Fan Law Calculator is a very useful tool for modeling “what-if” scenarios.
WIND CHILL CALCULATOR
This Wind Chill calculator is a useful tool when considering outdoor thermal comfort conditions.

Page 126
THERMAL COMFORT CALCULATOR
This Thermal Comfort Calculator models human comfort based on ASHRAE equations.

Page 127
SINGLE & DOUBLE INTERPOLATION AND
EXTRAPOLATION CALCULATOR
This interpolation and extrapolation calculator is extremely useful when needing to determine data
between known values. Linear interpolation and extrapolation is used.
FINANCIAL LOAN CALCULATOR
This tool is helpful for quick “cost of money” determinations for project work.

Page 128
WEATHER TERM GLOSSARY REFERENCE
Meteorologist using Psychrometric Analysis will appreciate the complete weather term glossary
provided with one button click.

Page 129
EXAMPLE PROCESSES
EXAMPLE 1:
Moist Air Sensible Heating
Saturated air at 35F enters a heating coil at 20,000cfm. Air leaves coil at 100F. Find the required
rate of heat addition.
Solution: 1,503,224 Btu/h

Page 130
EXAMPLE 2:
Moist Air Cooling & Dehumidification
Problem: Moist air at 85F dry bulb and 50% rh enters a cooling coil at 10,000 cfm and is processed
to a final condition at 50F and 100% rh. Find the tons of refrigeration required.
Solution: 51.1 tons

Page 131
EXAMPLE 3:
Moist Air Cooling & Dehumidification Below
Freezing
Problem: Moist air at 31F dry bulb and 85% rh enters a cooling coil at 5,000 cfm and is processed
to a final condition at 20F and 100% rh. Find the tons of refrigeration required.
Solution: 7.6 tons

Page 132
EXAMPLE 4:
Adiabatic Mixing of Two Moist Airstreams
Problem: A stream of 5000 cfm outdoor air at 40F dry-bulb temperature and 35F wet-bulb
temperature is adiabatically mixed with 15,000 cfm of 75F dry-bulb temperature air and 50% rh.
Find the resulting dry-bulb and wet-bulb temperatures.
Solution: 65.8°Fdb & 56.6°Fwb

Page 133
EXAMPLE 5:
Adiabatic Mixing of Water Injected into Moist
Air
Problem: Moist Air at 70F dry-bulb and 45F wet-bulb is to be processed to a final dew-point
temperature of 55F by adiabatic injection of saturated steam at 230F. The rate of dry airflow is
200lbda/min and the final dry-bulb temperature is 72.267. Find the rate of steam flow required.
Solution: 102.3 lb/h

Page 134
TERMINOLOGY
PSYCHROMETRIC TERM DEFINITIONS
Absolute Humidity
The ratio of the mass of water vapor to the total volume of a sample. The term "water vapor
density" is also used for this value.
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
Atmospheric Air
Air containing water vapor and many gaseous components such as smoke, pollen, gaseous
pollutants, etc.

Page 135
Density
The ratio of the total mass of a sample to the total volume of the sample. For moist air, water vapor
and air are included in the totals.

Page 136
Dew Point Temperature
The temperature of moist air saturated at the same pressure and humidity ratio. Or more simply the
temperature at which water vapor will begin to condense from a sample of air.

Page 137
Dry Air
Atmospheric air with all water vapor and contaminants removed.
The approximate percentage by volume of dry air is as follows:
78.084 % Nitrogen
20.9476 % Oxygen
0.934 % Argon
0.0314 % Carbon Dioxide
0.001818 % Neon
0.000524 % Helium
0.00015 % Methane
0.00010 % Sulfer Dioxide
0.00005 % Hydrogen
0.00020 % Other (Krypton, Xenon, Ozone, etc.)

Page 138
Dry Bulb Temperature
The temperature of air read on a standard thermometer indicating it's thermal state.

Page 139
Enthalpy
The thermodynamic property defined as energy per unit mass commonly used to define the internal
energy of moist air. The enthalpy of a sample of moist air is the sum of enthalpies of the air and the
water vapor. On the psychrometric chart Enthalpy is expressed in terms of energy per weight of
DRY air.

Page 140
Humidity Ratio
The ratio of the mass of water vapor to the mass of dry air of a sample.
Moist Air
A binary (or two-component) mixture of dry air and water vapor.
Psychrometric Chart
A graphical presentation of the thermodynamic and physical properties of air and water vapor
mixtures.

Page 141
Relative Humidity
The ratio of mole fraction of water vapor in a given moist air sample to the mole fraction in a
saturated air sample at the same temperature and pressure.
Saturation
A state of neutral equilibrium between moist air and the condensed water phase (liquid or solid).
This state is often referred to as the maximum amount of water vapor in moist air at a given
temperature and pressure.
Saturation Humidity Ratio
The humidity ratio of moist air saturated with respect to water (or ice) at the same temperature and
pressure.
Specific Humidity
The ratio of the mass of water vapor to the total mass of moist air of a sample.

Page 142
Specific Volume
The ratio of the total volume of air to the mass of dry air in a sample.
Standard Atmosphere
The standard of reference for estimating properties at various altitudes.
For HVAC purposes standard air is taken as 68°F and 29.921 inches Hg atmospheric pressure.

Page 143
Vapor Pressure
Pressure exerted by a vapor.

Page 144
Wet Bulb Temperature
The equilibrium temperature reached as water evaporates from a thoroughly wetted psychrometer
wick into an airstream. While this process is not one of adiabatic saturation, by applying only small
corrections one can obtain the thermodynamic wet-bulb temperature.

Page 145
ALGORITHMS
PSYCHROMETRIC ALGORITHMS
The following is the methodology the program uses in determining the psychrometric properties of
moist air:
Atmospheric Pressure
2559.56
)108753.61( ZAtmp ××−×= −
p = inches of Mercury
Atm = 29.921299597519
Z = elevation in feet
Water Vapor Saturation Pressure
For 311.67°R <= T =< 491.67°R
( ))ln(exp 7
4
6
3
5
2
4321 TCTCTCTCTCCTCpws ×+×+×+×+×++÷=
T = absolute temperature, °R = °F + 459.67
0
7
14
6
10
5
7
4
3
3
0
2
4
1
1635019.4
0344688.9
5575832.3
9202377.1
3765794.5
8932428.4
0214165.1
EC
EC
EC
EC
EC
EC
EC
×=
×−=
×=
×=
×−=
×−=
×−=
−
−
−
−
For 491.67°R < T =< 851.67°R
( ))ln(exp 13
3
12
2
111098 TCTCTCTCCTCpws ×+×+×+×++÷=
T = absolute temperature, °R = °F + 459.67
0
13
9
12
5
11
2
10
1
9
4
8
5459673.6
4780681.2
2890360.1
7022355.2
1294650.1
0440397.1
EC
EC
EC
EC
EC
EC
×=
×−=
×=
×−=
×−=
×−=
−
−
−

Page 146
Saturated Humidity Ratio
ws
ws
s
pfp
pf
W
×−
××
=
62198.0
p = total pressure of moist air
f = enhancement factor
wsp = pressure of saturated pure water
Enhancement Factor
f = calculated in accordance with Hyland and Wexler (1973, "The Second")
Humidity Ratio
For *
t > 32°F
*
***
444.01093
)()556.01093(
tt
ttcWt
W
ps
−×+
−×−××−
=
*
t = thermodynamic wet-bulb temperature of moist air, °F
t = dry-bulb temperature of moist air, °F
pc = specific heat of moist air, Btu/lb°F
*
sW = humidity ratio of moist air at saturation at thermodynamic wet-bulb temperature
For *
t <= 32°F
))32(5.034.143(444.01061
)()))32(5.034.143(444.01061(
**
****
−×+−−×+
−×−×−×+−−×+
=
tt
ttcWtt
W
ps
*
t = thermodynamic wet-bulb temperature of moist air, °F
*
sW = humidity ratio of moist air at saturation at thermodynamic wet-bulb temperature
Specific Heat
0.23955919+t105.8045267+t101.2900877+t102.5588383+t10-2.0921943 -62-83-114-14
××××××××=pc

Page 147
Specific Volume
p
Wt
v
)6078.11()67.459(7543.0 ×+×+×
=
W = humidity ratio of moist air, mass of water per unit mass of dry air
p = total pressure of moist air
Enthalpy
)444.01061( tWtcph ×+×+×=
W = humidity ratio of moist air, mass of water per unit mass of dry air
Wet Bulb
Iterative calculation calling Humidity Ratio function
Dew Point
Iterative calculation calling Saturated Humidity Ratio function

Page 148
LEGAL NOTICES
LICENSING
Use License
When you purchase a single user license, Hands Down Software grants you a non-exclusive
license to install and operate this software on one computer. Should you choose to purchase a
Network License, Hands Down Software will grant you a non-exclusive license to install this
software on one network server and operate the software on not more than the user limit provided
by the licensing you have purchased.
In addition, Hands Down Software grants you the right to make an archive copy of this software
and to use that copy to reinstall the software in cases where the original copy has been corrupted
or destroyed. The limits of your license to use this software must be understood prior to installation.
Program Ownership and Copyright Notice
This is a license agreement not a sale of the original program or copies thereof. Hands Down
Software retains all rights to the program and any and all subsequent copies which exist regardless
of their form. Reproduction of this software by parties other than Hands Down Software for reasons
beyond that which is specifically stated in this license agreement is strictly prohibited by
international copyright laws. Charts produced by this software are copyright the OEM Company
whose logo appears on the chart.
HDPsyChart was written by Hands Down Software and associates and may be distributed under
agreement between Hands Down Software and other parties. This software uses algorithms that
are generally accepted by the Heating, Ventilation and Air Conditioning (HVAC) industry and as
such the results of these calculations should yield acceptable results for use in general HVAC work.
DISCLAIMER OF WARRANTIES
Hands Down Software and the distributors of this software do not warrant that the information in
this software is free of errors. The program is provided "as is" without warranty of any kind, either
expressed or implied. The entire risk as to the quality and performance of the program and data is
with you. In no event will Hands Down Software be liable to you for any damages; including
without limitation any lost profits, lost savings, or other incidental or consequential damages arising
out of the use or inability to use this program and data.

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