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Version 5.01 – July 2012 / SW Version: 2012.06.12Errore. Per applicare Nadpis 1 al testo da visualizzare in questo punto, utilizzare la scheda Home.
© DRC Srl 2012
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4.1.9
FILTER
Selection of frequency band filters (these
frequency values are valid for SF instrument
only):
-
OFF,
-
1.0 MHz,
-
2.0 MHz,
-
2.25-2.5 MHz,
-
4.0 MHz,
-
5.0 MHz,
-
10.0 MHz.
4.1.10 VOLTAGE
Adjustment of the pulser voltage value – 75 to 275 Volts.
4.1.11 VELOCITY
Adjustment of the sound velocity value in the tested material – 1 m/s to 19999 m/s.
For convenient setting, there are predefined sound velocities in most frequently used
materials. During setting the velocity value, value “stops” at predefined velocities.
The
table
containing
predefined
sound
velocities
is
defined
in
the
D1000\lang\help\matvel_def.txt file, which can be easily edited and loaded for USB
device as other HELP files – see 10.6. Management of User Help.
This file can be displayed during browsing. If this file not found, the table is filled with
default values (as in older SW versions).
4.1.12 RANGE
Adjustment of the time base (sweep) range – 1.9 mm to 298901.0 mm for
longitudinal wave in steel (c
L
= 5990 m/s) (at PRF of 10 Hz) – two bottom keys on
the right side.
The maximum RANGE value is automatically limited depending on the PRF (Pulse
Repetition Frequency) value set in
HW_SET
menu – see 4.2. In order to allow higher
RANGE value, the PRF value shall be lowered accordingly – see 4.2.8. PRF.
There are automatic PRF modes available for 200, 100, 50, 20 Hz (indicated by
AUTO next to the PRF value), i.e. maximum possible PRF value is decreased
automatically, when the RANGE value is increased and vice versa, if the RANGE
value is shortened, then the PRF value increases up to the preset value.
For the RANGE values < 35.0 mm, the waveform is expanded digitally – this is
indicated with asterisk symbol (
*RANGE: ##.#mm
).