DMTA-10040-01EN, Rev. E, February 2018
Chapter 490
predetermined amount of time. This time may be set from 0.1 s to 10 s, in 0.1 s
increments. By default this feature is set to OFF.
PERSIST erases all information at a particular point after the selected amount of
time has expired, even if more information is displayed there at a later time. As a
result, the displayed signal might appear broken where the eddy current signals
intersect the signals being erased. However, the resulting display is very useful
for repetitive testing, because it is no longer necessary to manually erase the
screen.
To activate variable persistence, press the DISP menu key ( ), followed by the
Ckey. With PERSIST highlighted, rotate the knob to adjust to the desired value.
PERSIST is not available if display erase (D ERASE) or sweep mode (SWEEP) is
activated. In some applications, PERSIST may slow down the instrument’s data
acquisition rate, resulting in decreased instrument performance. If this is the case, it is
recommended to use display erase instead.
CURSOR
Adjusts the display of the eddy current signal trace on the NORTEC 600 screen by
changing the shape of the signal focal spot. Two settings are available:
DOT and BOX.
To adjust CURSOR, press the DISP menu key ( ), followed by the D key. With
CURSOR highlighted, rotate the knob to adjust to the desired value.
GRID
Five screen grid types are available: OFF, 10×10, FINE, COARSE, and WEB. By
default, the NORTEC 600 instrument uses a 10 × 10 grid.
To adjust the grid setting, press the DISP menu key ( ), followed by the E key.
With GRID highlighted, rotate the knob to adjust to the desired value.
OFF
The instrument does not display a grid pattern.
10×10
A 10 by 10 grid pattern is displayed, with some unusable areas on the left and
right sides of the screen.
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