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22.2 DRAWING A TCG CURVE
1. Couple the transducer to the first
calibration standard and peak up on
the reflector to achieve maximum
signal amplitude.
2. Enable the TCG function and adjust
the TCG settings to your requirements
(see "Adjusting TCG Settings" on
page 42). Ensure that the value of
DRAW is set to ON.
A highlighted cursor is displayed in the
waveform area, starting at the left most
side of the measurement screen.
3. In the hot menu, scroll to TCG BOX.
4. Use LEFT and RIGHT to move the cursor over the section of the waveform to be used as the
first point in the TCG curve and then press ENTER to set the first point of the curve.
5. Repeat step 4 multiple times to set other points of the curve.
The TCG curve is displayed after three points have been set/recorded, and will continue to be
redrawn/updated for each additional point added.
Note: A TCG curve can contain a maximum of eight points.
Note: Any point can be cleared by pressing CLR when the value of DRAW is set to ON.
6. Press MENU, scroll to the TCG menu and then highlight the DRAW function.
7. Use LEFT and RIGHT to scroll the value of DRAW to OFF.
The TCG curves are now set and ready to be used for
inspection.
8. Optional: To display the TCG curve:
•
In the TCG menu, highlight the CURVE function.
•
Use LEFT and RIGHT to scroll the value of CURVE to ON.
•
Press MEAS to return to the measurement screen.
The TCG curve is displayed.
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