Distance-Amplitude Curve According To Jis Z3060-2002 (Jisdac); Activating Jisdac (Dac According To Jis) - GE USM 36 Series Technical Reference And Operating Manual

5 Operation
5.19 Distance-amplitude curve
according to JIS Z3060-2002
(JISDAC)
The USM 36 has an optional DAC function for the echo
evaluation by means of the distance-amplitude correc-
tion (DAC) and an additional class rating according to
JIS Z3060-2002.
With the function JISDAC, you can activate a distance-
amplitude curve according to JIS including three evalu-
ation lines marked with the letters L (low), M (medium),
and H (high). They are permanently connected to the
DAC and shifted accordingly if the gain is varied.
In addition, a class rating takes place. Flaw echoes are
evaluated according to their amplitude with reference to
their position within the set of curves:
Class I: Amplitude < Line L
Class II: Line L < Amplitude < Line M
Class III: Line M < Amplitude < Line H
Class IV: Amplitude < Line H
5-104

Distance-amplitude curve according to JIS Z3060-2002 (JISDAC)

Activating JISDAC (DAC according to JIS)

– Switch to the second operating level.
– Select the function group EVAL.
– Select the function EVAL MODE and choose
JISDAC.
– Switch back to the first operating level. The function
group JISDAC is now displayed there.
If a stored DAC curve exists, it becomes effective now.
Issue 2 (12/2013) USM 36