Installation manual

Final tests and measurements
141
851-164574 / C
9 Access the Horizontal menu.
10 Push the Ping Sector button, and observe the P ing Sector
submenu appear at the bottom of the menu field.
11 Select Sector.
12 Read the oscilloscope measurements, and use the manual
training controls on the Operating Panel to obtain maximum
possible hydrophone voltage.
13 Enter the bearing angle, tilt angle, depth and water
temperature into the Measurements results table below.
→ Refer to table 4.
14 Make the requisite calculations in the Measurements results
table.
→ The Measurement results table is shown as table 4.
15 Enter the 20 log r and U H ydr. values from the
Measurements results table into the Source Level (SL) table.
→ The Source Level (SL) table is show n as table 5.
Measurements/calculations Value Unit Example
Measured time delay (t) msec 5
Distance from hy-
d
r
o
p
h
o
n
e
t
o
t
r
a
n
s
-
r = 1.5xt meter 7.5
d
rop
h
one
t
o
t
rans-
ducer
20 log r dB 17.5
Hydrophone voltage
i
n
O
m
n
i
U(p--p) volt 0.7
in Omni
U(RMS) = U(p--p)/2/√2 volt 0.25
U Hydr = 20 log U(RMS) dB//1V --12.1
Hydrophone voltage U(p--p) volt 1.4
in 11 degrees
U(RMS) = U(p--p)/2/√2 volt 0.49
U Hydr = 20 log U(RMS) dB//1V -- 6 . 1
General information Bearing (° Stb/Port) ° -- 3 6
T ilt angle ° 0
Depth below keel meter 3
W ater temperature °C 18
Table 4 Measurements results