Delta Watch: How to setup THP data import

Delta Watch how-to series

Step-by-step guide to configure THP sensor data import and visualisation

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Delta Watch: How to setup THP data import

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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

Setting up the sensor

Step 1 - Create the sensor

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


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

There are some important field here, as marked in the image

  1. Enter the last part of the filename exactly. This is by default the last 6 digits of the serial number preceded by the letters ‘DL’. See further down a detailed example under “THP filename anatomy
  2. The ‘Type’ need to be set to ‘Meteorological’, this to ensure correct processing and pre-configuration of the fields
  3. Coordinates (optional), if you intent to display the THP sensor icon on a map view, so you can have quick access to it, then you need to enter its coordinates here. This is optional and only required for map views or maps that are used in reports

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 2 - Customize the new sensor (optional)

The default configuration of all the THP sensor channels will be good enough for most usages. However if you want to customize the settings and/or configure alarms limits then you can do that now. It is also possible to do this at a later stage if required. Alarm limits will show on charts and can be used to trigger sending of emails and/or SMS messages.

  • Select the required sensor in the top-half of the screen.

Delta Watch will now load all sensor channels in the bottom half. Select the channel you want to adjust and click on the edit icon.

  • Make your adjustments, click [ OK ] , this will close the dialog. Repeat the steps for any other channel and when done click on [ Apply ] to save the changes to the database.

NOTE:     Even though Delta Watch shows many sensor channels, the basic weather station that comes with a Delta Link kit only has 3: Temperature; Humidity and Pressure

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:

Configure THP import settings
Setting Value
Name  Freely user chosen name for this import definition
Sensor Type  Set to ‘Meteorological’
Import/Export  Set to 'import'
Base directory  Directory where the THP files can be found
Time interval  interval at which Delta Watch should look for new data files
Import type  set to ‘AMTS - Meteorological'
Select project  select here the project for which this import is
Comment  allows to user to enter some information here









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.


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 filename anatomy

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.