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8 / 90 LX218-Operating-Manual-en1-04-(1908)
ZERO
There is helium that is weakly bound to the surfaces of a specimen as a natural part of
the ambient air and is pumped bit by bit into the measurement system of the leak
detector. It produces a slowly decreasing measurement signal.
If you want to hide this background signal or the display of existing leaks, then use the
ZERO function.