Service manual

Calibration

14 P2260/E

Split beam

transducer

Single beam

transducer

Minimum

distance

The sphere after

being moved to

the centre of the

single beam

The sphere in the

centre of the

split beam

(CD3144)

Figure 5

The Scope mode may be useful during this process as well. The scope plot starts

at the beginning of the super layer, and the horizontal axis contains 200 depth

samples. Accordingly, this depth scale is different for the different frequencies.

Check that the sphere is well within the super layer. Select the Test Menu,

Scope and a dynamic range for the plot (50 dB). Then select the highest

amplitude value to be included in the plot (-50 dB). The sphere echo should now

appear on the scope plot. Reduce the dynamic range to give a high vertical

resolution and adjust the highest amplitude to give a convenient plot where the

peak sphere echo reaches the horizontal centre line on the scale. Then move the

sphere in the transversal and longitudinal directions until the maximum

amplitude position has been found.

Use the TS detection window for single beam to read maximum TS value.

Look at the echogram and check that you have, from the top: