15
4 Operation
4.1 Adjusting the Display Range
The function group BASE enables you to make the basic adjustment of the
display range. The display on the screen must be adjusted for the material to be
tested and for the probe used.
Calibration requires the use of calibrated standard made of the same material
as the test piece. Prior to calibrating the instrument/probe combination, the
A-Scan display-screen range (the material thickness value represented by the
full horizontal width of the screen) will normally be set to a value equal to or
slightly larger than the calibrated standard.
- Activate the BASE submenu (located in the BASIC menu) by pressing
the menu key below it. Three functions will appear down the right side of
the display screen.
- Press the function key next to the selection titled RANGE. You
’
ll note
that RANGE has both coarse and fine adjustment modes. Coarse and
fine modes are selected by repeatedly pressing the corresponding
function key next to it.
- To change the range, turn the knob. Note that the maximum of range
setting is 6000 mm.
- The display
’
s horizontal range will remain as set.
Range is selectable in fixed steps
or continuously variable.
4.2 Setting the Material Velocity
Use VELOCITY to set the sound velocity within the test object. Always ensure
that the function VELOCITY is correctly set. The instrument calculates all range
and distance indications on the basis of the value adjusted here.
Velocity range
：
1000m/s
～
9999m/s
Coarse adjustment, in steps as follows :
2260m/s
2730m/s
3080m/s
3230m/s
4700m/s
5920m/s
6300m/s
Fine adjustment: 1000~9999 in steps of 1 m/s
4.3 Setting the Display Delay
Here you can choose whether to display the adjusted range (for example 300
mm) starting from the surface of the test object, or in a section of the test object
NDTzone • Non-Destructive Testing Equipment Specialists
Tel.: +1.877.363.4243 • eMail: [email protected] • Web: www.NDTzone.com
