Since a PDF file is a document and not software, you do not "install" it in the traditional sense. Instead, you download the file and open it using a PDF reader.
Here is a helpful guide on how to locate the manual and set it up for easy access on your device.
Once the batteries are installed, the device may power on automatically or require a press of the main button. dtape dt50 user manual pdf install
Calibration is not always needed for new units, but the manual recommends a field check:
Single Measurement:
Continuous Measurement (Tracking Mode):
Area/Volume Measurement:
Use advanced search operators: