Manual Gain; Velocity Of Sound And Material List; Measurement Range For A-Scan Range - Cygnus ROV UTM Operating Manual

• Echo-Echo
• Multiple Echo
• Auto SE/EE/ME
See Measurement Modes on page 27.

Manual Gain

When the tick-box is un-checked the Gain is set Automatically by
the subsea instrument. This is the default and recommended
setting.
When the tick-box is checked the gain is set Manually by the
operator, a slider control is displayed that adjusts the gain value
as required. The subsea instrument is updated with the new gain
value after the Ok button is pressed.

Velocity of Sound and Material List

One of these two settings are used by the gauge in determining
the flight time of the sound wave in the material being measured.
The speed at which sound travels in the material being measured.

Measurement range for A-Scan Range

The X-axis of the A-scan graph is ideally set to show the best
number of return echoes in the material being measured. The
gauge can automatically adjust the A-scan range using the
thickness measurement, or you can manually set the range to suit
the material thickness you expect to measure.
You can choose from the following A-Scan range values;
Cygnus ROV UTM - Operating Manual
Manual Gain Control.
Page 31 of 60