The new MI 3309 BT DeltaGT is a multi-function measuring device that can be operated with batteries as well as with mains voltage and is designed for carrying out safety tests on portable electrical equipment. The device contains a unique PRCD testing technology, which prevents triggering of the mains RCD during the measurement. Due to the dual power supply of the MI 3309, the instrument can be used to perform tests which are usually only found in larger and heavier devices (e.g. Differential leakage current, contact leakage current, power consumption, etc.). The device is equipped with additional inputs for performing tests on permanently installed devices. Thanks to the large LCD graphic display with backlight, two PASS/fail LED displays and THE HELP screens for each measurement, the handling and use of the device is clear and easy. The MI 3309 can store up to 1500 test results with parameters that can be downloaded to a PC for further data processing and test report generation (software included in standard version). The lightweight design, pre-programd and user-defined test sequence and the optional QR bar code system make the MI 3309 an ideal measuring device for the high number of professional safety tests carried out on portable devices. The enhanced communication capabilities of the MI 3309 support the use of a Bluetooth/RS232 label printer and an Android/RS232 barcode reader. In addition, the MI 3309 also supports the use of an RFID scanner for reading/writing RFID tags.This text is machine translated.