Simrad ES120-7G - REV C, Техническое описание, Страница: 1 / 2

TRANSDUCER
Simrad ES 120-7G
120 kHz Split-beam transducer
(855-164125 Rev
.C)
Introduction
The ES 120-7G is a split-beam transducer incorporat-
ing 76 piezo-ceramic elements arranged in four quad-
rants. Its compact housing is convenient for use with
portable echo sounders. The specications below are
valid when all four quadrants are connected in parallel.
Order number
KSV-112101
Technical specications
Resonant frequency.......................................120 kHz
Beamwidth, circular.....................................7 deg ±1
Directivity:
D...........................................................650 ±20%
DI=10logD .............................................28 ±1 dB
Equivalent two-way beam angle:
Ψ .......................................0.009 ± 20% steradain
10 log Ψ .............................................. -20.5 ±1 dB
Side lobes..........................................less than -15 dB
Back radiation ...................................less than -30 dB
Angle sensitivity:
Phase angle/angle to target................................21
Impedance:
Nominal.....................................................5 ohms
Max. variation in |Z| .........................11 - 20 ohms
Max variation in phase angle .........................±30 deg
Transmitting response.............................185.0 dB ±2
re 1µPa per V
Receiving sensitivity, open circuit ........ -186.5 dB ±2
re 1V per µPa
Electroacoustic efciency ......................... 0.70 ±0.20
Maximum pulse power input .........................1000 W
Maximum continous power input ......................10 W
Maximum transducer depth ............................. 150 m
Cable length ....................................................... 20 m
Cable diameter ................................... 10.6 ±0.50 mm
Weight without cable ..........................................2 kg
Storage temperature ................................-20 to 70 °C