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Unit Zeroing
Two zeroing mode are available use AZ (Automatic Zero) if you
operate in an environment where Helium background is variable.
AZ mode continuously compensate the sensor reading bringing it slowly to zero.
NOTE
Keep it in consideration during your leak checking activity with AZ.
Use FZ (Fixed Zero) operating in an environment where background
of Helium is stable.
As soon as FZ mode is activated the current “leak rate” value is taken as a
NOTE
reference point and considered as zero.
PHD-4 Portable Helium Detector User Manual
Technical Information
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87-900-120-01 (F )
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User Interface
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