Simrad EY500, Instruction Manual

Page: 18 / 262

System familiarization
12
P3400/B
Maximum detection range for different transducers:
Type Beamwidth
(degrees)
Cable
length
(m)
Max. detection depth
Freshwater (m)
Max detection depth
Seawater (m)
fish bottom fish bottom
TS =
!30
dB
TS =
!50 dB
TS =
!30
dB
TS =
!50 dB
38-22 11x22 15 500 170 3000* 360 140 1900
ES 70-11 11x11 15 440 150 1500* 260 120 950
70-24 11x11 15 480 170 1500* 270 130 950
120-25 11x11 25 440 170 900* 230 120 650
ES120-7 7x7 20 500 210 900* 260 140 700
200-7 7x7 15 350 150 600* 190 100 490
200-28 7x7 25 350 150 600* 190 100 490
200-30 30x30 15 110 40 600* 85 35 290
710-30 5x5 15 75 40 160 65 35 130
710-36 2.5x2.5 15 95 60 180 80 50 150
These transducers can be hull-mounted, foil-mounted or provisionally mounted on a rod. The
range calculations are valid for water temperature 10
E
C, Sound absorption according to Francois
& Garrison, JASA Dec. 1982, Fish target strength
!
30 dB and
!
50 dB, Bottom backscattering
strength -10 dB per sq. m, Acoustic noise = SPL-DI+M+B (dB re 1 V) SPL = 142 -
20 log f (dB re 1
F
Pa per Hz). Electrical noise -189 + B (dB re 1 W), Detection threshold = 10
dB. Seawater salinity 3.5%, 0.3% for freshwater.
* = Sample limited
Transceiver dimensions and weight:
Transceiver: L340 x W350 x H141 mm, 7 kg