Delta Watch: How to setup THP data import

This article will guide you step by step through the process of setting up THP data import into Delta Watch. Each Delta Link unit comes with its own basic weather station sensor, simply called THP sensor. THP stands for: Temperature Humidity Pressure. To get the best results from this sensor, and be able to apply as good as possible PPM corrections to distance measurements, it should be installed in an appropriate weather shield on a suitable location. The installation of the sensor goes beyond the scope of this document but is discussed in the actual Delta Link manual.

To be able to visualize the data the user needs to configure Delta Watch (DW). Once this is done the data can be viewed on its own in the Meteorological section under Project management or combined with geodetic observations.

For simplicity of this document we assume that:

1. Your Delta Link unit is operational
2. The THP sensor connected
3. Data flow from Delta Link to Watch is working
4. You have some THP data files already on your system (*.THP)
5. Delta Watch v2.15.51 or higher is installed
6. A (empty) project is already created in Delta Watch

Step 1 - Create the sensor

The first step is to add/create the sensor in the Point and Limit management module in Delta Watch.

Navigate to ADMINISTRATION > POINT AND LIMIT MANAGEMENT > SENSOR MANAGEMENT

On this tab, click on the [ + ] button. A dialog pops up which allows you to configure the new sensor details, see picture

When done, click [ OK ]. The sensor is now created and sensor fields are added. The result might look similar to below image. If you have more THP sensors on the same project then add all of them here before continuing. When all is done don’t forget to click [ Apply ] to save your changes.

Step 3 - Create the import definition

Now that the sensor(s) is created in the Point and Limit management section we can create the import definition. Navigate to: INTERFACES > IMPORT & EXPORT

NOTE:   For THP sensors we only have to create a single import definition per project, this will automatically import all THP data for each configured sensor in the Point and Limit management section.

In the Import & Export section click on [ + ] to add a new definition, a new dialog should load.

You now need to configure its settings as per below table:

See below image for an example of a configured THP data import definition.

Optional - Extended settings

• Active: allows activating/deactivating this import definition
• Start time: setting a date/time here allows the import to start some time in future but also to synchronise the import with data arrival. For example, if the data always arrives around 10 minutes past the hour then setting a time of 00:12:00 will trigger the import only a few minutes after the data arrived.
• Data time zone: for data files not generated by Delta Log the date/time used to timestamp the data might not be UTC and here you can specify the correct time zone.

Optional - Monitor data transfer

If you want to send alarms if data has not arrived for a certain amount of time then you can configure that here. Click on [ + ] to add a recipient and define the amount of time after which the message should go out. If you have to recipient setup you would need to do this first.

Finished

Once all is setup and saved to the database, [ Apply ] button, Delta Watch might, depending on your start time and interval settings’, already start with the import. When this is the case you can also see the status here in the import & Export module in the columns ‘Latest data transfer’ and ‘Total data transfer’. An example of this can be seen in below image

Step 4 - Creating viewing definition

To be able to view the THP data on its own chart we need to create the viewing definition.

• Navigate to PROJECT MANAGEMENT > METEOROLOGICAL, select your project and then [ Add ] a new sensor field, as per below image. A new dialog pops up where you can give the new definition a meaningful name.

NOTE: You can combine multiple THP sensor inputs into a single definition

• Select your sensor and then activate the ‘sensor field configuration’ tab
• Under the item ‘Geotechnical sensors’ click [ Edit ], a new dialog pops up where you can make your sensor selection, see below image.
• Now select all relevant sensors on the left hand side you want to add and move them to the right by clicking on the [ -> ] button. Then click [ OK ] and [ Apply ].

• Activate the CALCULATION tab so we can view the data, see below image. If you do not see any data then check the following:
  1. Select one or more sensors from which you want to see the charts
  2. Select which channel you want to view, only one can be selected at a time
  3. Adjust your start and end time to ensure these match your imported data
  4. Click on [ Display ]  to apply the selection of the above 3 items
  5. Specific view adjustment can be made by clicking on the [ Chart options ] button. This allows, for example, for Y-axis scaling configuration.

THP filenames are automatically generated by the Delta Log software, below the description of how to dissect this.

Filename construction: [date_code]_[time_code]_[name].thp

[date_code] is ‘yyyymmdd’

[time_code] is ‘hhmm’

[name] is ‘DL’ and the last six digits of the Delta Link serial number OR a custom specified name

In our example

Actual Filename:              20170916_0030_DL000085.thp

[date_code] is 20170916 which translates to 16-sept-2017

[time_code] is 0030 which translate to 00:30 (24Hr clock)

[name] is DL000085 and this is what you enter exactly in the ‘Name’ field during configuration in the Point and Limit Sensor management table.