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B-Start and B-Depth are analogous to Delay and Range for a B-Scan display respectively.
Delay and Range or B-Start and B-Depth may be adjusted in the hot menu or in the DISP section
of the main menu.
ADJUSTING DELAY AND RANGE (OR B-START AND B-DEPTH)
The quickest way to adjust DELAY and RANGE is directly from the hot menu. Alternatively, adjust
the values using the menus:
1. Select MENU/DISP/DELAY or RANGE and adjust using the "LEFT" "RIGHT" or use the
DIGITS EDIT BOX
2. Press OK to set the value
3. Press MEAS to return to the measurement
6.7 ADJUSTING B-SCAN SCROLL SPEED
The scrolling speed of the time-based B-Scan can be adjusted to suit your measurement
techniques.
To adjust the scroll speed
1. Select MENU/DISP/BSCAN SPEED
2. Choose a value between 1 and 10 (10 is fastest)
3. Press OK
4. Press MEAS to return to the measurement screen.
6.8 GAIN
The gain (the amplitude of the transmitted pulse) can be adjusted to suit a variety of applications.
To obtain valid readings the gain must be set to the correct level to give reliable return echoes:
•
Too much gain may result in erroneous measurements by detecting noise rather than the
material back wall itself.
•
Not enough gain may result in intermittent detection. It may also result in lack of detection on
internal flaws, pits, or porosity.
The gain setting on your gauge can be compared to the volume control of a home stereo system.
If you turn it up too much you cannot hear the music clearly. If it is turned down too much, you cannot
hear it at all.
Note: When the echo-echo through-paint measurement mode is selected, the manual gain feature
is disabled and greyed out in the menu items. In this mode, your gauge switches to an automatic
gain mode (AGC) that optimises the gain setting automatically.
Your gauge has been optimised for a medium gain setting and for the majority of applications it can
be used at this setting. Some applications however may require lower or higher gain settings:
•
Lower values might be necessary for noisy or granular cast materials. If the reading becomes
sporadic and will not settle down or resolve on a thickness value.
•
Higher values may be necessary when trying to measure a material that is hard to penetrate
(due to the material type, or the overall thickness of the material) and when locating fine pits or
flaws. In these instances, increase the gain until the stability indicator reports a good
measurement.
TO ADJUST THE GAIN VALUE
The quickest way to adjust GAIN is directly from the hot menu. Alternatively, adjust the value using
the menus:
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