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7.6 API 5UE Mode – Evaluation of Indications acc. to API 5UE
Notes:
GATE 4 has its own velocity, which can be set in range from 1 m/s up to
20000 m/s.
AWS MODE shall be “OFF” – see 4.8. CURVES Sub-Menu (SETTING).
1. Activate the API 5UE function either
in the
SETTING
–
CURVES
menu – see
4.8, or
in the
GATES
menu – see 4.4.5.
GATE 4 shall be active in API 5UI
mode (pink indicator 4fx in the
Status Window).
2. Depress the
key (Display Freeze)
for longer than 1 sec, the FREEZE
MAX mode of A-scan is activated with red indicator
*PEAKS*
in the Status
Window – see 3.4. The maximum signal envelope is displayed simultaneously
with “live” echo.
3. With active FREEZE MAX mode, move probe over a calibration notch in the
reference block and get envelope shape. Bring GATE 4 over the echo and
adjust VELOCITY value (
pink
– for GATE 4) to get calibrated size of the
reference notch.
The value is displayed in Status Window as
API fx= xx.xx
[mm or inch]. In order to
display value of the notch under the test, echo from the notch shall cross the GATE 4
level – GATE 4 level shall be adjusted accordingly.
The width of peak at half level of echo amplitude measured with GATE 4 is used for
calculation, velocity multiplied by amplitude/100% FSR (Full Screen Range), so if
echo peak is 100% of screen, then coef = 1.
API 5UE function works in combination with all other modes, except RF mode. When
AWS function is activated, value is displayed on the same position in Status Window
as API value, but when FREEZE MAX is activated, API 5UE has preference.
