Purge Calculations for Probe Data Collection Intervals

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Purge Calculations for Probe Data Collection Intervals

The Ground Water (GW) form in EDGE can be used in conjunction with a field probe to capture field parameter data, which are displayed in the Field Results section of the form. The time interval for data capture from the probe can be calculated using purge data. The calculated_time field on the GW form will calculate an average time interval for data to be captured from the field probe based on the ratio of the groundwater purge volume and the purging rate. The calculated_time is generated automatically by EDGE when the pertinent purge information is entered in the Water Level and Purge Data section of the GW form.

 

Setup the Water Level and Purge Data Section

 

Prior to connecting EDGE to the probe for field data collection, the Water Level and Purge Data section on the GW form must be appropriately configured to perform the automatic time interval calculation. From the GW form, select the Setup icon within the View group on the Form ribbon. Select Water Level Purge 1 to open the Data Section window.

EDGE-Purge_Calc_setup

Ensure the following fields from the WaterLevel_Purge section of the EDGE format are checked to display in the Water Level and Purge Data section on the GW form:

purge_vol_calc

purge_vol_unit

purge_rate

purge_rate_unit

tubing_length

depth_unit

tubing_diam

tubing_diam_unit

pump_vol

flowcell_vol

vol_unit

calc_vol_purge_method

calculated_time

 

 

Connect to Probe

 

Select one of the supported probes from the Devices ribbon to open the Probes Manager.

EDGE-Devices_Ribbon

EDGE-Probes_Manager_Horiba

Click Connect. The Probes Manager identifies the selected probe.

EDGE-Probe_Horiba_Empty

Click Connect. Data is imported, as seen in the image below.

EDGE-Probe_Horiba_Data

For this example, the field parameter data are being captured by the probe every 5 seconds by default. If using the calculation field, do not import data from the probe until the purge information has been entered on the GW form and the calculation has been made.

 

Enter Purge Data in GW Form

 

Enter the following data:

tubing_length – [user input]

depth_unit – [ft] default

tubing_diam – [user input]

tubing_diam_unit – [inch] default

pump_vol – [user input]

flowcell_vol – [user input]

vol_unit – [l] default

purge_rate – [user input]

purge_rate_unit – [user input]

 

Select the Equipment Volume Method for the calc_vol_purge_method field. The calculate_time field will be populated with the calculation results. This time will be used to setup the intervals in Probes Device manager for importing rows of field parameters data. In the example below, the calculated time interval to pull records from the probe is 44 seconds.

EDGE-Purge_Calc_Result

Once the calculated_time is obtained, press F7. The probe will readjust the data acquiring interval to the calculated_time. Ensure the Field Results show the field parameters collected by the probe.