Updating Positional Tags for Biomet Data

Updating Positional Tags for Biomet Data

Version 8.0.0 of the LI-7500RS/LI-7500A/LI-7200RS/LI-7200 gas analyzer embedded software implemented a new identifier for Biomet data.  The identifier is a set of three digits that indicates the horizontal position (h), vertical position (v), and replicate number (r) at that position.  This naming protocol is based on the protocol for the AmeriFlux and ICOS networks (http://ameriflux.lbl.gov/data/aboutdata/data-variables/).  This information is stored by the LI-7550 in the biomet.metadata file for use with EddyPro® Software.  In the Sutron datalogger, there is a communications tag (ComsTag) which is formatted using this h_v_r identifier:

Figure1

The labels for vertical positioning start at the top, while horizontal positioning is arbitrary.  For example, if your site has two air temperature sensors, one above the other, the upper one would be labeled TA_2_1_1_1_1, and the lower would be TA_2_1_1_2_1.  Each sensor type has its own positional numbering, as shown in the example below.

Figure2

Unfortunately, older Sutron biomet programs do not have this h_v_r tag when they send data to the LI-7550.  If you are using a Sutron program written before August 2015 with version 8.0.0 or above of the LI-7500RS/LI-7500A/LI-7200RS/LI-7200 software, you might find that EddyPro Software compresses certain replicates into a single output (for example, all three soil temperature readings would be averaged into a single TS_1_1_1 output).  If this is the case, you will need to update your setup file with the appropriate h_v_r tags.  There are two ways to do this, one through the graphical interface and one through the .ssf setup file.  The .ssf file might be quicker to edit.

Graphical Interface Editing

1. Connect to the Sutron datalogger through the XTerm software.

2. Click on Setup Access. Click on the Setup tab at the top.  Select Graphical Setup.

Figure3

3. Click on Edit to enter the graphical interface. Click on the first ComsTag block you see, and select Edit Properties.

Figure4

4. Select the Name property. It is in the format Name_UnitsID_VariableID, such as SWC1_12_36.  You need to add a horizontal, vertical, and replicate identifier (h_v_r) on the end of this TagName, such as SWC1_12_36_1_1_1.

Figure5

5. Repeat steps 3 and 4 for all ComsTags. Each type of variable must have a unique h_v_r identifier.

6. When you are finished, save this setup file by clicking Exit at the top, and clicking on the Main tab.

SSF File Editing

1. Connect to the Sutron datalogger through the XTerm software.

2. Click on Setup Access. Click on the Setup tab at the top.  Note which Setup File the logger is currently using.

Figure6

3. Click on File Transfer, on the right side of the window. A new window will appear—on the left is your computer’s directory, and on the right is the Sutron directory.  On the computer directory, double-click a folder to open it, and click the [..] button at the top to exit a folder.  Select the setup file you are currently using on the Sutron datalogger (.ssf) and move it to your computer using the  <== button at the bottom.  Exit the window.

Figure7

4. On the computer, open the .ssf file in a text editor like Notepad or Wordpad.

5. Click Edit, Find. Enter “ComsTag” to find the first ComsTag section.

Figure8

6. In the ComsTag section, change the TagName. It is in the format Name_UnitsID_VariableID, such as SWC1_12_36.  You need to add a horizontal, vertical, and replicate identifier (h_v_r) on the end of this TagName, such as SWC1_12_36_1_1_1.

Figure9

7. Repeat steps 5 and 6 for all ComsTags. Each type of variable must have a unique h_v_r identifier.

8. Save this .ssf file. On Xterm, click on File Transfer again.  Select the .ssf file on your computer and move it to the Sutron using the  ==> button at the bottom.  Exit the window.

9. Click on the Setup tab at the top. Select Setup File and click Open.

10. Re-open the setup file, and the new file should be loaded with the new h_v_r identifiers.

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