# Using the Oil Level Trend Data window This window displays the trend data of the oil level check.
| The trend data measurement of the oil level check in the transmission software version E300.1-D5.2.0.0 is still under development.
| How to open Oil Level Trend Data:
Click Service > Oil level in the main window. All the appropriate data is read automatically from a connected transmission control unit.
| How to delete the trend data of the oil level check:
The trend data of the oil level check is used to monitor the oil level throughout the entire transmission runtime. This data is not deleted. To delete the trend data of the oil level check nonetheless, perform a reset in the Reset diagnostic function. For this purpose, select Service > Reset functions > Delete trend data of the oil level check in the main window. For further information, please see: Reset functions.
| How to stop communication with the transmission control unit:
> | Click the symbol to stop communication with the transmission control unit. This function is required for debugging tasks only.
| How to start communication with the transmission control unit:
> | Click the symbol to start communication with the transmission control unit. This function is required for debugging tasks only. Communication with the transmission control unit is built up automatically when the window is opened. An existing communication is shown by the progress bar.
| Further topics:
More information on: Drain converter, expert information More information on: Operational principle of the trend data of the oil level check More information on: Communication problems More information on: Reset functions More information on: FAQ Up > Higher-level section © by Voith Turbo GmbH & Co. KG send remarks to joachim.ehleiter@voith.com (electronic department) or r.theilacker@voith.com (electronic department)