Installation manual

Final tests and measurements
139
851-164574 / C
11.2 Source level (SL) measurements
Preparations
The procedure calls for a test hydrophone. Prior to use, fill in the
technical specifications and the appropriate environmental
specifications for the hydrophone to be used. Use the table
provided.
→ Refer to table 3
Hydrophone data
Value Unit Example
Serial number Serial No. 1823860
Date of calibration* month/year 10/96
Calibrated at temperature °C 18°
Sensitivity as transmitter S dB//1µPa/V 119.2
Sensitivity as receiver M dB//1V/µPa --208.9
M extension cable (0.7/10m) dB//1V/µPa 0.7
M total = M + M extension dB//1V/µPa --209.6
Table 3 Test hydrophone data
Finally, you need to hook up the test equipement.
→ Refer t o figure 44 for the necessary test schematics.
Preparing the operational mode
For measurement of the source level in omni mode, use the
following menu settings.
1 Select the Setup menu.
2 Press the Test... button to access up the System Text menu.
3 Press the Te s t C on f i g button.
4 Observe the Te s t C on fi g submenu appear in the bottom part
of the menu field.
5 Select Source Level.
This command sequence has now automatically set up all the sonar
parameters required to do the source level measurements.
Test procedure
Observe the following procedure to make the source level
measurements.
1 Connect the hydrophone and TX Enable pulse to the
oscilloscope as shown in the test schematics.
2 Ensure that the distance between the transducer and the
hydrophone is between 5 and 10 meters.