Simrad ES120-7DD - REV B User manual

120 kHz split-beam transducer for
deep water installations
(855-164289 / Rev.B)
TRANSDUCER
ES 120-7DD
Introduction
The ES 120-7DD is a split-beam transducer
incorporating 76 piezo-ceramic elements distributed
over four quadrants. It is designed for deep water
installations with a maximum depth of 1500 m.
The following specications are valid when all four
quadrants are connected in parallel.
Order number
KSV-112417
Technical specications
Resonant frequency.......................................120 kHz
Circular beamwidth............................................7 deg
Directivity:
D......................................................................650
DI=10 log D ................................................28 dB
Equivalent two-way beam angle:
ψ...................................................................0.009
10 log ψ ..................................................-20.5 dB
Side lobes..........................................less than -15 dB
Back radiation ...................................less than -30 dB
Angle sensitivity (phase angle to target).................21
Impedance:
Nominal value .......................................... 15 ohm
Max. variation in |Z| ........................ 11 to 20 ohm
Max. variation phase angle.......................±30 deg
Transmitting response .....................................185 dB
(dB re 1µPa per V)
Receiving sensitivity open circuit..................-187 dB
(dB re 1V per µPa)
Electroacoustic efciency ....................................0.60
Maximum pulse power input .........................1000 W
Maximum continuous power input ....................10 W
Maximum transducer depth ........................... 1500 m
Cable with underwater connector ..................... 0.5 m
Weight without cable ...........................................6 kg
Storage temperature ..............................-20 to +70 °C

Manufacturer:
Simrad AS
Strandpromenaden 50
P.O.Box 111
N-3191 Horten
Telephone: [phone]
Data
Admittance of one quadrant
Installation
Beam pattern