Calibration Modes - Olympus EPOCH 650 User Manual

DMTA-10055-01EN, Rev. A, February 2015
Note that the Velocity parameter is disabled when the instrument is in time-of-
flight (µs) mode. Select Meas Setup > Unit (group 3/5), then select mm or in to
enable the Velocity parameter.
3. Choose Basic > Zero, and then adjust the zero offset of the instrument to 0.000 µs.
4. Choose Basic > Range, then set the range based on the sound path range within
the selected calibration block.
Use more range than necessary to ensure all calibration echoes appear on the screen.
5. Choose Basic > Delay, then set the screen delay to 0.00 mm or (0.000 in.).
6. Choose Trig > Angle (group 1/5), and then enter the correct refracted angle for the
probe (0 for a straight beam probe, 45 for a 45° probe, etc.).
7. Choose Trig > Thick, and then set the material thickness to 0.00 mm or (0.000 in.).
8. Choose Rcvr > Reject (group 1/5), and then set the reject level to 0 %.
9. Select Gate 1 > Status (group 2/5), and set it to On to activate gate 1.
10. Couple the transducer to the block, and then adjust the pulser and filter settings
to create a clean A-scan.
For more information on pulser and receiver adjustments, see "Pulser
Adjustments" on page 107 and "Receiver Adjustments" on page 111.
Use the auto measurement reading selection feature so that the EPOCH 650
automatically displays relevant thickness/sound path measurements during
calibration based on the instrument settings. For more information, see "Reading
Setup Page" on page 91.
9.2

Calibration Modes

The EPOCH 650 ultrasonic flaw detector features multiple calibration modes to
accurately meet the requirements of the selected transducer, calibration test block,
and application. These calibration modes can be adjusted in the Auto Cal menu.
There are two modes for straight beam transducers and two modes for angle beam
transducers.
144 Chapter 9