–18 –
range is .100” (2.54mm) to 1.0” (25.4mm), the user should calibrate on a known
thickness sample close to 1.0” (25.4mm).
NOTE:
It’s always handy to carry a set of mechanical calipers to use in conjunction
with the TI-007DLX for calibration of various materials in the field:
One Point Calibration
NOTE:
Be sure that a probe zero has been performed prior to performing this
calibration procedure.
1. Physically measure an exact sample of the material, or a location directly on the
material to be measured, using a set of calipers or a digital micrometer.
NOTE:
A sample or location on the test piece should be used as close to the maximum
thickness of the test range to minimize error.
2. Apply a drop of couplant on the transducer and place the transducer in steady
contact with the sample or actual test material. Be sure that the reading is stable and
the repeatability indicator in the top left corner of the display is fully lit and stable.
3. Press the
key to enter the calibration edit screen displaying the current
measurement value.
4. Use the
and
keys to scroll to the known thickness value.
NOTE:
The longer the keys are pressed and held, the faster the value will increment/
decrement.
NOTE:
Pressing the
key prior to pressing the
key will abort the CAL
routine without
saving any changes.
5. Once the known thickness value is being displayed, press the
key to
display the calculated material velocity edit screen.
NOTE:
The calculated velocity can be edited, if needed, by pressing
the
and
keys to scroll and edit the velocity value.
6. Press the
key to set the calculated material velocity and return to the
measurement screen.
CHECK YOUR CALIBRATION! Place the transducer back on the calibration point
and verify the thickness. If the thickness is not correct, repeat the steps above.
Two Known Thicknesses
The two point calibration should be considered when an application requires improved
accuracy over a small measurement range based on tolerance requirements. This
calibration option calculates both the ‘probe zero’ and ‘velocity value. If the two point
option is used, a probe zero is not required. For example, if the measurement range was
.080” (2.03mm) to .250” (6.35mm), two known samples or locations on the test material
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