Simrad 27-26/21 Manual de usuario

TRANSDUCER

Simrad 27-26/21

27 kHz Dual-beam transducer

(855-160793 Rev.D)

Introduction

The 27-26/21 is a dual-beam transducer incorporat-

ing 45 Tonpilz elements. The narrow and wide beams

employ 45 and 21 elements respectively. The trans-

ducer’s housing is made of berglass reinforced poly-

ester (GRP) and is designed for installation in a steel

blister.

Order number

KSV-067159

Technical specications

Resonant frequency.........................................27 kHz

Longitudinal beamwidth:

Narrow beam.........................................10 ±1 deg

Wide beam.............................................10 ±1 deg

Transversal beamwidth:

Narrow beam.........................................11 ±2 deg

Wide beam.............................................20 ±4 deg

Directivity index:

Narrow beam............................................25.5 dB

Wide beam................................................20.5 dB

Equivalent two-way beam angle Ψ:

Narrow beam...........................................-18.0 dB

Wide beam...............................................-13.0 dB

relative to 1 steradian

Nominal impedance ....................................... 60 ohm

Maximum variation in |Z| .................... 45 to 80 ohm

Maximum variation in phase angle ..............±30 deg

Transmitting response:

Narrow beam..............177.0 ±2 dB re 1μPa per V

Wide beam..................171.5 ±2 dB re 1μPa per V

Receiving sensitivity, open circuit:

Narrow beam............ -170.0 ±2 dB re 1V per μPa

Wide beam................ -175.5 ±2 dB re 1V per μPa

Electro-acoustic efciency:

Typical ............................................................0.70

Minimum........................................................0.50

Maximum input power:

Narrow beam............................................3000 W

Wide beam................................................1500 W

Maximum duty cycle at max power.....................0.05

Maximum transducer depth ............................. 500 m

Cable length ....................................................... 25 m

Cable diameter .................................... 12.5 ±0.8 mm

Weight without cable .........................................35 kg

Storage temperature .............................. -20° to 70°C

Manufacturer:

Simrad AS

Strandpromenaden 50

P.O.Box 111

N-3191 Horten

Telephone: +47 33 03 40 00

Data

Installation

Narrow beam Wide beam

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