| Bottom Finding Pingers |
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| BF-312 |
| Bottom Finding Pinger |
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A bottom finding pinger, used in conjunction with a standard 12 kHz shipboard bathymetric recorder can be used to monitor the height off bottom of instruments or sampling equipment being lowered through the water column. The instrument can be used effectively for positioning of CTD instrumentation, fishing nets, coring tools, water bottles or other items where accurate vertical positioning relative to the bottom is required.
Precision pingers and positioning beacons require high power, long life and a high level of frequency and repetition rate stability to allow asynchronous operation with shipboard recording and processing instrumentation.
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Features:
• Monitor instrument height off bottom
• Sea floor positioning beacons
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| Operating Frequency |
12 kHz
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| Carrier Frequency |
±50 Hz
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| Source Level |
195 dB re 1 µPA @ 1 meter
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| Repitition Rate |
1 second or 0.5 second when activated by mercury tilt switch
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| Repitition Rate Stability |
±50 µsec
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| Pulse Length |
Internally selectable 0.5, 2, 5, 10 msec
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| Battery Type |
20 replaceable "C" cells
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Operating Life:
Alkaline Expandable Batteries |
250 hrs @ 1PPS, 0.5 msec pulse width
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| Rechargeable Battery Charging Time Using Model BC-31 Battery Charger |
16 hours maximum
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| Pressure Housing |
Aluminum anodized
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| Operating Depth |
10,000 meters
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| End Cap Closure |
Single bolt closure
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| Transducer Beam Pattern |
50° conical
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| Optional Reversing Cable Clamp |
7-15 kHz |
| Operating Temperature |
-5° to +50°C
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| Storage Temper |
-20° to +81° C |
| Dimensions |
5 in. O.D. X 26 in. long
Transducer end 7 in. O.D
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Weight
In Air
In Water |
19 cm (42 lb)
10.4 cm (23 lb) |
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