8.1.2 Advanced Compensation

When you select Advanced compensation, the Data Compensation Options window will open.

First, you will select how you want your data displayed (Manual Data Adjustment):

• Height of Water Above Sensor is the default display option. Select this option to perform a Barometric Compensation and/or Parameter Adjustments to one or more data files, while keeping the sensor diaphragm (zero point) as the reference point.
• Depth to Water Level adjusts water level data to represent depth to water level readings (from the top of a well casing or other reference point) by entering a field zero, such as a manual depth to water level measurement. Adjustments can be made to one or more data files.
• Elevation of Water Level adjusts water level data to represent elevation of water level readings (above sea level or other reference point) by entering a measuring point elevation, and a field zero, such as a staff gauge measurement from that point. Adjustments can be made to one or more data files.
• Parameter Adjustments Only allows you to adjust one or more data files to different units, elevation, etc., while keeping the sensor diaphragm (zero point) as the reference point for Leveloggers. It also allows you to change Rainlogger data file parameters.

Next, you will select Yes or No to Barometrically Compensating the data (will not be active if you selected Parameter Adjustments Only).

Next, you will select Yes or No to performing any Parameter Adjustments on the data files (will not be active if you selected Parameter Adjustments Only).

Click Next, after you have selected all of your Data Compensation options.

In the next window, you will choose the Levelogger file(s), Rainlogger file(s), and Barologger file(s) you would like to use in the compensation. Any files you have open in the Data Control tab will be listed.

Use the directory on the left of the window or click to open any other data files you would like to compensate. Ensure the files you want to compensate are highlighted in the list. If doing a Barometric Compensation, ensure the Barologger file is highlighted. Do this by clicking the file name. To de-select a file, click again. Select Next to continue.

 

If you have selected yes to Parameter Adjustments, or selected the Parameter Adjustments Only option, in the next window you will enter these. You can expand the window by clicking ">>" to show additional adjustment options. If you did not select to change any parameters, this window will not be shown.

Next, for each selected Levelogger file, you will enter the Field Zero(s) you would like to use to manually adjust your Levelogger data. (If you have selected Height of Water Above the Sensor or Parameter Adjustments Only, this window will not be shown.)

For Depth to Water Level adjustments, enter a Field Zero (A). If the static water level is below your Field Zero measurement, the Field Zero is input as a positive value (e.g. a manual water level meter measurement taken from the top of a well casing. See Example 8.1). If the static water level is above your Field Zero, the Field Zero is input as a negative value (such as in an artesian condition).

The Time the Field Zero measurement was taken must replace an actual reading in the Levelogger file. This is selected from the drop-down menu showing all time stamps in the Levelogger file. Click ‘Add’ to apply the adjustment. If you need to change a Field Zero, click ‘Update’ after any edits.

 

 

For Elevation of Water Level adjustments, enter a Measuring Point Elevation (A) and a Field Zero (B) from that Measuring Point.

If the static water level is below your Measuring Point, the Field Zero is input as a positive value (e.g. if you are using a manual depth to water measurement as a Field Zero, from the top of a well casing as the Measuring Point).

 

If the static water level is above your Measuring Point, the Field Zero is input as a negative value (such as a flowing artesian condition in a sealed wellhead). The Measuring Point elevation may also be entered as a negative value.

The Time the Field Zero measurement was taken, must replace an actual reading in the Levelogger file, and is selected from the drop-down menu showing all time stamps in the Levelogger file. Click ‘Add’ to apply the adjustment. If you need to change a Field Zero, click ‘Update’ after any edits.

You can make multiple adjustments to one data file by selecting ‘Add’ again to enter another Field Zero. All readings after this Time, will be adjusted to this second measurement. You can add as many adjustments to one Levelogger data file as you would like (as long as it doesn't exceed the total number of readings in that file).

Select Next to complete the compensation.

The compensated data will automatically be saved in a new *.xle file. The default file name will be the <original Levelogger file name> with the word <compensated> added to the file name prefix. Alternatively, the user can rename the compensated file by saving it in the Data Control tab. Do not change or delete the file extension. All data files are saved to the default location: <C:\Program Files\Solinst\Levelogger4_7\Data>.

The next window will show the results of the compensation. If the compensation was unsuccessful, there will be an explanation in the Reason column (e.g. time stamp of Levelogger and Barologger files were not close enough to perform an accurate compensation). You can still view the compensated file in the Data Control tab, by clicking ‘Open’ in the Action column. If the compensation is successful, select ‘Open’, to view the compensated data file in the Data Control tab.

 

If you have selected multiple files for compensation, there will also be the option to 'Open All' of the compensated files in the Data Control tab or 'Export All' of the compensated files at the same time. Options are to export as *.csv files or *.xml files.

 

From the Data Control tab, you can view the data, save the compensated file with a new filename and/or export the data (see Section 7).

All the original Levelogger settings and the channel information effective during data collection are shown on the top left of the window. The bottom left sections of the window are used to display the compensation information. The middle section displays information from the Barologger, and the bottom section includes information about manual data and parameter adjustments.