March 2006 910-257C
MG2 Series Page 4-5
To adjust the Gain from the default Gain value:
From the Measure mode, press [2
nd
F],[ ](GAIN) to toggle
between Gain High to Gain Low to Default Gain.
4.4 Material Gain Sensitivity Optimization
(Models MG2-XT and MG2-DL Only)
The Material Gain Sensitivity Optimization feature allows the normal
measurement sensitivity to be increased or decreased by an amount
related to the measured peak noise in a specific transducer and
material combination. Normally, the MG2 Series gages adjust
receiver gain and detection level depending on both the transducer
type and the received echo characteristics. Also, each transducer type
imposes its own maximum gain and detection threshold to prevent any
transducer related or material related noise from being seen as a
thickness echo. This works well in most corroded material gaging
applications. However, in certain special cases, it is advantageous to
modify those fixed limits on sensitivity.
The Material Gain Sensitivity Optimization feature of the MG2-XT
and MG2-DL optimizes by using actual material noise level
measurements rather than fixed gain boost or fixed attenuators. While
the transducer is coupled to a thick sample of the material of interest,
the gage measures the peak noise level up to a specified backwall
thickness. Then the gain and detection threshold values are adjusted to
produce the minimum backwall sensitivity without hanging up on
noise.
Performing the sensitivity optimization procedure on different
materials may yield different results. In the case of grainy materials
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