Simrad ES70-11 - DATASHEET REV B Datasheet

TRANSDUCER
Simrad ES 70-11
70 kHz Split-beam transducer
Introduction
The ES70-11 is a split-beam transducer in a stream-
lined housing. It can be mounted outside the vessel
hull or on a towed foil. The transducer has 36 piezo-
ceramic elements arranged in four quadrants. It can
also be used as a single-beam transducer by con-
necting the four quadrants two and two, rst in par-
allel and then in series. The specications below
are valid when wired as a single-beam unit.
Order number
KSV-110280
Technical specications
Resonant frequency.........................................70 kHz
Beamwidth, circular...................................11 deg ±1
Directivity:
D ........................................................... 250 ±20%
DI=10logD .............................................24 ±1 dB
Equivalent two-way beam angle:
Ψ.......................................0.022 ± 20% steradain
10 logΨ.............................................. -16.5 ±1 dB
Side lobes ..........................................less than -15 dB
Back radiation ...................................less than -30 dB
Angle sensitivity:
Phase angle/angle to target .............................13.7
Impedance:
Nominal...................................................60 ohms
Max. variation in |Z| .........................45 - 80 ohms
Max variation in phase angle .........................±30 deg
Transmitting response ................................175 dB ±2
Receiving sensitivity, open circuit ........... -181 dB ±2
Electroacoustic efciency ......................... 0.50 ±0.10
Maximum pulse power input ...........................800 W
Maximum continous power input ......................40 W
Maximum transducer depth ............................. 150 m
Cable length ....................................................... 20 m
Cable diameter ..................................... 10.6 ±0.5 mm
Weight without cable in water ............................8 kg
Weight without cable in air ...............................12 kg
Storage temperature ................................-20 to 70 °C
re 1µPa per V
re 1V per µPa