Gilardoni RDG600 - AVG Curve Construction Procedure

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base. The base material is normally Plexiglas, which has a velocity of
s
ound of 2700m/s in longitudinal waves. It is used together with the probe
zero and sample velocity to calculate the length of the equivalent field and
the actual crystal distance from the interface between base and specimen.
MODE:
SET ATT
Used to set the attenuation parameters.
T-LOSS
Used to set the transfer losses (in dB’s) due to the surface conditions, poor
coupling, etc.
REF dB/m
Used to set the attenuation of the sample block reference material,
expressed in dB/m.
MAT dB/m
Used to set the attenuation of the ultrasonics in the specimen material,
expressed in dB/m.
MODE:
SET REF
Used to set the reference values.
TBVEL
Used to set the calibration block velocity, in m/s.
REF TYPE
Used to select the reference reflector type.
Flat Bottom Hole FBH)
Side Drilled HoleSDH!
Back Wall EchoBWE!
REFSIZE
Used to set the dimension of the reference reflector. If the REF TYPE
option is selected on BWE REFDIMis set onINFINITE
MODE:
SET SIG
Used to perform the calibration. 
CURSOR
Used to select the reference signal with the vertical bar, moving with
a
nd
: once the echo is identified press S
ETThe instrument calculates
the sensitivity and draws the curve on the screen. 
MODE: ON
The ON MODE is automatically enabled after creation of the ADA curve.

TRIGGER
U
sed to select the GATEorCURVEas monitor for the measurement.
ERS
Used to select the dimension of the equivalent flaw. 
AVG curve construction procedure
24. Go to the AVG function of the main MEAS menu; the operating mode is set on OFF and the FREQ,
NFL and ERS fields are available;
25. Enable the FREQ window by using the adjacent key and set the transducer frequency value using the
setting keys
and ;
2
6. Enable the NFL option by using the adjacent key and set the next field value using the setting keys
a
nd
;
2
7. Enable the ERS option by using the adjacent key and set the equivalent flaw value using the setting keys
and ;
28. Select SET PRB in the MODE video window using the key;