Simrad ES38DD - REV E User manual

Simrad ES38DD
Split-beam echo sounder transducer
Introduction
The Simrad ES38DD is a split-
beam echo sounder transducer
incorporating 88 Tonpilz elements
distributed over four quadrants. The
transducer is lled with liquid, and
may thus be used at water depths
down to 1500 meters.
The Tonpilz elements used in
the ES38DD are identical to those
found in the ES38B transducer, and
therefore generate similar data with
the exception of higher back radiation
and lower efciency.
Order number
KSV-113392
Specications
The specications provided are
valid when all four quadrants are
connected in parallel.
• Resonant frequency: 38 kHz
• Circular beamwidth: 7 deg
• Directivity D: 630
• DI = 10 log D: 28 dB
• Equivalent two-way beam
angle Ψ: 0.009
• 10 log Ψ: -20.5 dB
• Side lobes: Less than -14 dB
• Back radiation: Less than -14 dB
• Angle sensitivity: 21.9
• Nominal impedance: 15 ohm
• Max. variation in |Z|: 11 to 20 ohm
• Max. variation in
phase angle: ± 30 deg
• Transmitting response:
183 dB re 1μPa per V
• Receiving sensitivity, open
circuit: -179 dB re 1V per μPa
• Electro-acoustic efciency: 0.40
• Max. pulse power input: 4000 W
• Max. continuous input: 40 W
• Max. transducer depth: 1500 m
• Cable length, four pairs: 1 m
• Connector: 8-pin Burton female
(5501-2008)
• Cable diameter: 11 mm
• Weight: 58 kg
• Storage temperature: -20° to 70°C
-10
-20
-30
-40
(CD017014B)
0
46
44
43
41 39
38
37
36
42
35
40
-10
-8
-6
-4
-2
0
2
4
6
8
10
510 15 200
B (mS)
G (mS)
(CD017014A)
TECHNOLOGY FOR SUSTAINABLE FISHERIES
www.simrad.com

855-160786 / Rev.E / May 2008
Simrad ES38DD Transducer
45o
ø450
SIMRAD FORWARD
FORWARD
ø11
ø22
12
8
37
ø424
ø480
ø225
172
(CD017014C)
ES388DD Connections
ES38DD Outline dimensions
(Note that the drawing
is not to scale.)
Kongsberg Maritime AS
Strandpromenaden 50
P. O.Box111
N-3191 Horten,Norway
Simrad
Telephone: [phone]
Telefax: [phone]
[e-mail]
www.simrad.com