User's Manual

SECTION 1
Introduction
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613 USA
Tel [phone] • Fax [phone] • e-mail: [e-mail]
AIRMAR
TECHNOLOGY CORPORATION
m 32
2000 #17-1205
New • THRU-HULL STEM MOUNT • Depth
B45
120 kHz, 150 kHz, 200 kHz
50/200 kHz Dual Frequency
Specifications
• Shielded piezoceramic element for noise free echosounder display
• Designed to meet CE requirements
• Installation requires a small 22 mm (
7
⁄
8
") diameter hole
• Standard cable length: 10 m (33')
• Accommodates hull thickness:
Min. no fairing: 6mm (
1
⁄
4
")
Max. no fairing: 92mm (2
5
⁄
8
")
Max. with fairing: 50mm (2")
• Weight: 1 kg (2.2 lb)
Options
• Standard fairing #33-351-01
• High speed fairing #33-352-01
• Temperature
• Waterproof molded connector
Applications
• Planing and displacement hull powerboats
• Cruising sailboats
• For use on fiberglass or wood hulls only
Notes
• Replaces Airmar model B3
Small, low cost bronze housing
Double ended shape of housing deflects aerated water providing clearer echoes
Optional streamlined fairings dramatically improve
echosounding above 20 knots and greatly reduce drag
Optional low impact fairings vertically orient sound
beam
Note: See page m1 for footnotes.
*Unbalanced Impedance
PERFORMANCE DATA
Frequency
1
– Airmar Piezoceramic Designator
2
120 kHz – B 150 kHz – A 200 kHz –B 200 kHz –U 50/200 kHz – A
Element Material
3
/Diameter (mm)
PZT/ 37 PZT/ 27 BT/ 28 BT/ 38 PZT/ 44
Beam Width at –3 dB
16° 19° 13° 11°
45° 12°
Q (fr/∆ f @ –3 dB)
4
21 23 22 22
28 31
Rated RMS Power (W)
300 200 250 375
600 600
Voltage Responses: Transmit/Receive
5
(dB)
161/–181 160/–185 162/–187 164/–185
155 /–174 164 /–184
Figure of Merit (Insertion Loss)
6
(dB)
–25 –27 –26 –22
–31 –21
Balanced Impedance
7
: Resistance, Rp (ohm)
Capacitance, C p (pF)
260 400 510 510*
190 410
860 550 560 1,930*
720 720
Series Impedance [R – jX]
8
(ohm)
250 – j40 380 – j80 450 – j160 300 – j250
175 – j40 360 – j130
Acoustic Window Material
Urethane Urethane Urethane Urethane Urethane
B45
101 mm
[3.97”]
55 mm
[2.15”]
M22-1.5
threads
114 mm
[4.50”]
31 mm
[1.24”]
High Speed
Fairing
Standard
Fairing