GE Krautkramer USM 35X, Руководство оператора

Страница: 115 / 226

Krautkramer USM 35X Issue 01, 04/2005 5-67
Operation
DAC according to JIS Z3060-2002 (only USM 35X DAC and USM 35S)
DACMOD (Activating DAC according to JIS)
You can use this function to activate the DAC. The fol-
lowing settings are available:
• off
No DAC is active.
• DAC
DAC according to JIS with 6 curves. The first 4 curves
are identified with the letters L, M, H and U dedicated
to these curves, and therefore move with any gain
change.
In JISDAC also the echo evaluation in classes can be
performed. The flaw class depends on the position of
the echo peak within the first 4 curves:
class I: amplitude < curve L
class II: curve L < amplitude < curve M
class III: curve M < amplitude < curve H (registra-
tion level)
class IV: amplitude > curve H
– Select the function DACMOD .
– Use the right-hand rotary knob to select the DAC
setting.
If there is a DAC stored, it will now be active.
– Select the TCG setting.
The TCG function is activated so that the DAC
becomes a horizontal recording threshold. This
means: all reference echoes recorded are brought
(lifted or lowered) to the same echo height.
– Use the right-hand rotary knob to select the setting
off in order to deactivate the DAC again.
Krautkramer USM 35X Issue 01, 04/2005 5-67
Operation
DAC according to JIS Z3060-2002 (only USM 35X DAC and USM 35S)
DACMOD (Activating DAC according to JIS)
You can use this function to activate the DAC. The fol-
lowing settings are available:
• off
No DAC is active.
• DAC
DAC according to JIS with 6 curves. The first 4 curves
are identified with the letters L, M, H and U dedicated
to these curves, and therefore move with any gain
change.
In JISDAC also the echo evaluation in classes can be
performed. The flaw class depends on the position of
the echo peak within the first 4 curves:
class I: amplitude < curve L
class II: curve L < amplitude < curve M
class III: curve M < amplitude < curve H (registra-
tion level)
class IV: amplitude > curve H
– Select the function DACMOD .
– Use the right-hand rotary knob to select the DAC
setting.
If there is a DAC stored, it will now be active.
– Select the TCG setting.
The TCG function is activated so that the DAC
becomes a horizontal recording threshold. This
means: all reference echoes recorded are brought
(lifted or lowered) to the same echo height.
– Use the right-hand rotary knob to select the setting
off in order to deactivate the DAC again.