910-269-EN, Rev. B, June 2011
Adjusting the Pulser/Receiver (Conventional UT Mode) 91
4.3
Setting Reference Gain and Scanning Gain
Establishing the current system gain as the reference (base) level is useful for
inspections that require the establishment of a reference gain level, and then the
addition or subtraction of scanning gain.
To add scanning gain
1.
Press
[2
nd
F]
,
[GAIN] (REF dB)
.
The gain display reads:
REF XX.X + 0.0 dB
. Scanning gain can now be added or
subtracted.
2.
Press
[CHECK]
to select either the coarse or fine-adjustment mode.
Coarse adjustment varies the gain value by ±6 dB. Fine-adjustment varies the gain
value by ±0.1 dB.
3.
Use the
[UP]
and
[DOWN]
arrow keys or the adjustment knob to vary the
scanning gain.
While using the reference gain and scanning gain, the following parameters appear in
the
1/5 > Basic
submenu.
Add
Used to add the scanning gain to the reference gain and deactivate the reference
gain feature.
Scan dB
Used to toggle the scanning gain from the active level to 0.0 dB (reference level)
allowing a direct amplitude comparison to the reference indication.
Off
Used to exit the reference gain function without adding the scanning gain to the
base instrument gain.
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Содержание EPOCH 1000 Series
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