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5
Technical Information
User Interface
Setup Menu
High Sensitivity
The High “Sensitivity” command can be used to set the most suitable
degree of sensitivity for the leak detection activity in course. The
degree of sensitivity set at power-on of the device is always the Low
Level (LS) (“High Sensitivity” not selected). Enabling the “High Sens”
command, the minimum detectable concentration changes from 100
ppm (LS) to 2 ppm (HS).
Pump on
The “Pump on” command allows temporary disabling of intake and
analysis of the gases using the probe. When “Gas sampling” is
disabled, the PHD-4 is in stand-by status; the screen page displayed is
the measurement page where the indication “Ready” replaces that
referring to the leak rate measured.
To return to operating status, press soft-key 3 (PUMP) or return to
the QUICK/Gas sampling/enable menu.
Audio on
Disabling the “Audio on” command, it is possible to mute the acoustic
signal proportional to the leak rate emitted by the PHD-4 in the
operating phase.
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PHD-4 Portable Helium Detector User Manual / 87-900-120-01 (F )
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