VDT Vacuum Leak Tester
Overview
The VDT/S is a vacuum leak tester for blisters and other packaging forms. The maximum vacuum (absolute pressure range up to 100 mbar) and the vacuum hold time before release can be easily set via the symbol keypad. The actual vacuum is continuously displayed on the LED display. Test run parameters such as actual/set vacuum value and hold time can be simply documented via a usb interface or a connected printer.
Leak Testing
For checking the density the ERWEKA VDT/S performs a methylene blue dye test, which is divided into several phases. During the pressure maintenance phase the blisters are exposed to a vacuum, which is generated in the vacuum container. Afterwards the container is ventilated.
In the subsequent penetration process the blister is resting in the methylene blue solution, so that the solution can suck into any imperfectly sealed packaging.
The integrated vacuum pump can be recalibrated using the optional validation kit which includes a vacuummeter, type DVR.
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