Endress+Hauser NRF81, Руководство по эксплуатации

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Operating menu Tankside Monitor NRF81
204 Hauser
HTG evaluation: dependence on measured pressure
If the level of the product approaches the the P1 or P2 pressure sensor, the measured
pressure becomes very small and the measurement might be too inaccurate for the Tank
Gauging application. To solve this problem, a minimum pressure P
min
is defined in the
Minimum pressure parameter (→  207). If the pressure measured by the sensor P1 or
P2, respectively, the software stops calculating the density and either holds the last
calculated value (for the density) or returns the HTMinLevel (for HTGLevel).
• If P2 is smaller than P
min
, the software stops calculating the density and uses the last
density value.
• If P1 is smaller than P
min
, the software stops calculating the level and uses the value of
Minimum level (→  207) , instead.