The following instructions will take you through the steps necessary to retrieve data from your temperature logger. Please make sure you have read through the "Instructions for Mac Users" or "Instructions for Windows Users" postings first.
The screenshots below depict the OneWireViewer application for Mac OS X; the Windows version should be virtually identical.
As always, please let me know if you have any questions or if something needs to be clarified. Thanks!Before proceeding, have your temperature logger handy and make sure the USB adapter and probe are connected to your computer.(1)
Launch the OneWireViewer application. You will see the following window:(2)
Touch the probe to the temperature logger - you can press down a bit for hands-free operation. You will notice a new item in the Device List, a long serial number and then "DS1921G-F5" - this is the temperature logger:(3)
Click on this device to select it and then click on the "Thermochron" tab that appears (as you did when you "missioned" your logger). The logger's current mission status will be displayed:(4)
Click on the "Temperatures" tab and you will see a graph that represents the temperatures that have been logged since the mission was started. For our purposes make sure the "Fahrenheit" box is checked.
Control-click (or right-click) somewhere in the center of the graph to display a popup menu and then click on "Copy Data to Clipboard with Labels":(5)
Launch your text editor of choice - TextWrangler (Mac), Notepad (Win) or even Word. Open a new blank document and then select "Edit --> Paste". Each temperature record with the date/time, temperature unit, and temperature reading will be displayed in comma separated format:
Save this document on your desktop so you can easily find it again when you need to open it in a minute. NOTE: Be sure to save this document as "Text Only", "Text Only with Line Breaks", or "Comma Separated".
At this point you can disconnect the logger and close the OneWireViewer application if you want to.(6)
Open your spreadsheet application of choice (e.g., Excel) and select "Open" from the file menu. Navigate to the text file you just created and click "open". If you are using Excel you will be presented with the "Text Import Wizard". Select the "Delimited" radio button then click "Next":
Select "comma" as the delimiter (this is simply telling Excel how to properly display the data in columnar format) and click "Next":
Accept the default selections in Step 3 and click "Finish":(7)
Your temperature data wil be displayed across three columns. Don't worry if you see a bunch of # symbols in the first column - this just means that the data in those cells are too large to display at the column's current width. To correct this display, simply click the "A" at the top of the column and select "Format -->Column -->AutoFit Selection":
You can do this for all of the columns if you like.
Save this spreadsheet as your raw temperature data file, no longer in text format but in the native format of your spreadsheet application (e.g., Excel Workbook).
That's it! You should now be able to retrieve data from one or more loggers at intervals that will be specified at the start of a monitoring period. Your feedback on this tutorial is appreciated!
At this point you can create various graphs to display the temperature data and/or plug the data into our Degree Day worksheet (instructions provided in a separate thread, online soon).