Olympus Sonic 1200S/HR, User Manual

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Control Descriptions 47
4.16 Thickness Menu
The THICK key calls up the thickness menu shown and is used to adjust the thickness gauge
parameters. The thickness gauge controls are used to enable, configure, and calibrate the
thickness gauge. The thickness gauge uses gate 1 for IP - 1
ST
and both gates (1 and 2) for
ECHO - ECHO.
GAIN See GAIN parameter description in the Receiver menu section.
T-GAUGE Enables or disables the thickness gauge feature and selects the measurement mode.
The thickness gauge may be set to operate in IP - 1
st
, Echo-to-Echo, Auto IP-1
st
, or Auto Echo-
to-Echo mode. In Auto IP-1
st
or Auto Echo-to-Echo mode, Auto-Cal is based on acquiring
readings of two known thickness references. Notice that in the Auto IP - 1
st
, or Auto Echo-to-
Echo mode, the OFFSET soft key is replaced by the THK CAL soft key function.
Thickness gating is performed using the instrument’s flaw gate(s). IP - 1
st
thickness
measurements require gate 1, while Echo-Echo thickness measurements require both gates 1
and 2.
Turning the thickness gauge ON forces the appropriate gate or gates ON. Conversely, turning
the thickness gauge OFF forces the appropriate gate or gates OFF. When the thickness gauge
alarm is enabled and an alarm condition occurs, readings will be displayed in inverse video.
Gate alarm conditions cause amplitude readings to be displayed in inverse video.
TRIGGER Selects the part of the signal used to trigger for the thickness measurement.
Selections include edge (leading) or peak.
OFFSET Selects and displays the thickness gauge zero offset. The offset adjustment range is
used to establish the starting point for IP - 1
ST
measurements. Offset is adjustable from -5µs to
100µs.
THK CAL Selects the thickness reference value for CAL PT 1 and CAL PT 2. Press ENTER
key at each CAL PT to advance and calibrate.
T-VEL Selects and displays the thickness gauge material sound propagation velocity. The
adjustment range is 0.0250 in/µs to 0.6000 in/µs.
THICK