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7.5 AWS Mode – Evaluation of “d” value acc. to AWS Code
Notes:
API 5UE mode shall be “OFF” – see 4.8. CURVES Sub-Menu (SETTING).
DGS mode shall be “OFF” – see 4.8. CURVES Sub-Menu (SETTING).
All previous DAC curve settings will be deleted after the AWS mode has
been activated.
The slope of AWS evaluation curve is 2 dB/in. (2 dB/25 mm).
Classification tables had been adopted from the AWS D1.1/D.1.1M:2002,
Table 6.13.1 and 6.13.2.
1. When the instrument is calibrated with appropriate probe, depress the
SETTING
button.
2. Depress the
CURVES
button.
3. Make sure that the API 5UE mode is
OFF.
4. Switch the AWS MODE to ON.
5. Return to the Basic Menu (depress
the
SETTING
button twice).
6. The
DAC
button had changed to
AWS
.
7. Depress the
AWS
button (
AWS
).
8. Make sure that TR.CORR (transfer
correction) is set to 0.0 dB.
9. Place the transducer on a calibration block containing reference reflector and
locate the reflector.
10. Swivel the transducer to peak the echo.
11. Depress “--- ADD” button to record the reference point. The reference
evaluation curve appears at the echo peak level, with “AWS REF” indicator
just above the "DEL ---".
12. The measured value is displayed in the Status Window as “
AWS d=…
”
13. If CLASS DISP is ENABLE and AWS value had been measured and is valid,
then corresponding classification A, B, C, D is calculated and displayed as
yellow-black next to the result.