Point Load Test2.5 - App Store

*NOTE: This is a new version of the PLT app. The old version will remain listed in the meantime but will be removed soon.

The Point Load Test Application was designed to be used in conjunction with a GCTS PLT-2W. This application allows the user to easily perform tests and record data by connecting to a PLT device via Bluetooth.

The device will output load and displacement from a pair of sensors, which will be read by the app and used to calculate point load test results. The app allows two-step calibrations of these readings, and also can obtain pre-loaded calibration factors from within the PLT-2W.

Using this application, specimen measurements can be made with ease. By simply placing the specimen in the apparatus as shown in the application and applying a small load, the application will automatically calculate the dimension of the specimen in that axis. This app can be used with diametral, axial, or irregular specimens. In addition, the application can be set to reuse certain dimensions, so if a core sample is used, the application can be set to use the same diameter for each specimen tested.

The operator can also define a custom equation for determination of the unconfined compressive strength from the point load strength index as calculated by the test. The application will automatically graph the load versus equivalent core diameter and automatically calculate the unconfined compressive strength for the rock specimen.

This app also allows the measurement of Ultrasonic P-Wave Velocities when paired with a ULT-2 or ULT-200.

Version History Updated Age Rating 2.5 12/17/2025 - Fixed issue where app would freeze when graphing data
- Fixed crash when changing crosshead height 1.50 10/28/2020 - Fixed a bug in device discovery that in some cases resulted in not being able to find a nearby PLT. 1.44 08/05/2020 - Fixed some issues with displacement calibration when performed while using USCS units.
- Misc. improvements 1.43 12/05/2019 - Fixed issue where "Cal. Load" button opened the wrong sensor to calibrate. 1.42 10/31/2019 - Fixed an issue with the Bluetooth adapter not being correctly initialized. 1.41 04/25/2019 - Project will now update current specimen as soon as new specimen is added or share button is pressed
- Automatic Mode and Variable Specimen switches now work as intended
* If auto mode is off, no specimen will be inserted until the "add specimen" button is pressed 1.4 11/23/2018 - Solved an crash when no e-mail account is detected in the device. 1.31 09/07/2018 - Solved some issues with comma as the decimal separator
- Improved automatic testing when load starts above threshold; random freezing used to occur
- Fixed an issue where factors wouldn't refresh in the hub after done calibrating 1.3 08/24/2018 - Fixed issue with factors not being received correctly from PLT
- Fixed bug causing crash when manually getting measurements
- Fixed issue with graph covering other elements in the Project screen 1.2 07/31/2018 - Fixed issues with graph showing random lines sometimes
- Improved visualization when zooming in
- Added better visual cues when the app is busy
- Fixed some issues with factors not being saved to the PLT device 1.1 07/18/2018 1.0 04/12/2018