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Operation
Gate adjustment
All functions for adjustment of Gates a and b are con-
tained in the function group GATE.
– With JC go to function group GATE.
The gates have two tasks:
• They monitor the area of the test object in which a
flaw is expected. When an echo exceeds or falls
below the gate, a warning signal can be activated.
• They select the echoes for the digital time-of-flight or
amplitude measurement.
5-10
USN 52R/USN 52L make the two gates a and b avail-
able. Gate b is only required for the measurement or
calibration of multi-echo sequences and enables the
measurement of the distance between two echoes. The
flaw Gate b is dependent of Gate a and is correspond-
ingly adjusted:
• b-START: at 10% to 90% of a-WIDTH (after a-
START)
• b-THRESH: 10% to 90% screen height
Attention:
When both gates are superimposed on each other, the
wrong values can be indicated with a wrongly selected
Gate b.
Both gates evaluate only within the visible area of the
display. If there are gates or parts of gates outside this
area, an evaluation will not be made.
Issue 05, 02/00
Adjustment of the USN 52R/USN 52L
Krautkramer USN 52R/USN 52L
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