910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Conventional UT Mode) 133
9. Calibrating the EPOCH 1000 Series
(Conventional UT Mode)
This chapter describes how to calibrate the EPOCH 1000 Series in conventional
ultrasound mode. Calibration is the process of adjusting the unit so that it measures
accurately on a particular material, using a particular transducer at a particular
temperature.
You must adjust the zero offset and velocity parameters of the EPOCH 1000 Series
during calibration. Zero offset (sometimes referred to as probe delay) compensates for
the dead time between the firing of the main bang and the entry of the sound into the
test piece. The unit must be programmed with the correct velocity setting so that it
matches the material velocity of the test piece.
The EPOCH 1000 Series features an advanced auto-calibration (parameters in the
1/5
> Auto CAL submenu), which provides for a fast and easy calibration process. The
following section details the procedure to calibrate the EPOCH
1000 Series when
using the four basic transducer configurations: straight beam, delay line, dual
element, and angle beam.
Do not use the auto-calibration when the EPOCH 1000 Series is in the following
modes: Microsecond (time-of-flight), DAC, or TVG.
Calibration is explained in detail in the following sections:
• Getting Started
• Calibration Modes
• Calibrating with a Straight Beam Transducer
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