Dakota Ultrasonics
8
3) Press the
ENTER
key to select the transducer type and display overwrite
existing probe screen.
4) Press the
OK
key to overwrite the existing probe type with the newly
selected probe type. The zero probe screen will be displayed. Proceed to
the zero probe section that follows.
2.4 Probe Zero & Calibration
The next steps are to perform a probe zero and calibrate the
DFX-7
to the material
and transducer being used. If the sound velocity is unknown, the
DFX-7
can be
calibrated to a known thickness sample. This demo will briefly explain both of these
techniques.
The
DFX-7
is equipped with two zero options:
1)
Off Block Zero (Automatic Probe Zero)
– When this feature is enabled the
DFX-7
will do an electronic zero automatically, eliminating the need for a zero
disk or block.
2)
On Block Zero (Manual Probe Zero)
– When this feature is enabled the
transducer must be placed on the probe zero disk (battery cover located on the
top of the unit.
Note:
Transducers of the same type will have very slight mechanical and electrical
variations. If it’s discovered that the linearity is off following an initial auto probe zero
and extreme accuracy is required, a manual zero should be performed followed by an
auto zero. This will adjust and eliminate any error. This is only required if it’s
discovered the transducer is non-linear following an initial auto probe zero.
The procedures are outlined as follows:
Содержание DFX-7
Страница 35: ...Dakota Ultrasonics 34 Note Sets where the detection will occur on the negative or positive going echoes...
Страница 219: ...Dakota Ultrasonics 82 10 Finally press the MEAS key to return to the measurement screen and begin taking readings...
Страница 308: ...171 APPENDIX B SETUP LIBRARY Num Name Comment 1 Gn AGC Velocity 1 Enter Custom Name 2 3 4 5 6...
