Ronan X96S DENSITY GAGE Manuel d'utilisateur télécharger pdf (Page 8)

Density Gage Manual 012407

• Digital Filtering – signal smoothing to reduce statistical radiation noise

• Dynamic Tracking – quick gage response to quick process changes.

• Source Decay Compensation – automatic compensation for the radioisotope decay

• Calibration (Referencing) – calibration of gage to user process.

The Calibration (or Referencing) procedure relates detector output (in counts) to numeric values that accurately represent the actual

process density.

The density algorithm (or curve) used by the X96S software is an exponential function. That is, the relationship between the

detector output and the process density is mathematically expressed as:

= I

-ut(d-d

)

Where:

= detector signal with process density (d)

= detector signal with reference density (d

) in pipe

u = the absorption coefficient

t = pipe internal diameter

d = density usually expressed in SpG

= reference density

The "calibration constant" (1/ut) is used by the X96S software to calculate process density.

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Ronan X96S DENSITY GAGE Manuel d'utilisateur Page 8