881A Borehole

881A Borehole

Underwater Hardware Specifications

Frequency

675 kHz
-Other frequencies can be selected through programmable software configurations
(Tunable from 600 kHz to 1 MHz in 5 kHz steps)

Transducer

Profiling type, fluid compensated

Transducer Beam Width

600 kHz:  2.4°
675 kHz:  2.1°
1 MHz:  1.4°

Range Resolution

1 m - 4 m:  2 mm (0.08")
5 m & up:  10 mm (0.4")

Min. Detectable Range

150 mm (6")

Orientation Module (accuracies)

Pitch & Roll:  ± 0.1° typical
Heading:  ± 1.0° typical

Max. Operating Depth

1000 m and 3000 m available

Max. Cable Length

1000 m on typical twisted shielded pair (RS-485)

Interface

RS-485 serial interface @ 115.2 kbps (or optional RS-232)

Connector

End mounted, four conductor, wet mateable (Subconn MCBH4M-AS)

Power Supply

20 - 36 VDC at less than 5 Watts

Dimensions

(For Both depth ratings)
See drawing
 

Weight in Air

1000 m unit:  ~2.7 kg (~6 lbs)
3000 m unit:  TBA

Weight in Water

1000 m unit:  ~1.1 kg (~2.5 lbs)
3000 m unit:  TBA
 

Materials

1000 m unit:  6061-T6 Aluminum, PVC & Polyurethane
3000 m unit:  Titanium, Polyurethane, PVC & 300 series stainless steel                   

Finish

Hard Anodize

Software Specifications

Win881A.exe

v3.01

Windows Operating System

Windows XP, Vista, 7, 8, 10

Modes

Side Scan, Polar, and Sector

Range Scales

1 m, 2 m, 3 m, 4 m, 5 m, 10 m, 20 m, 30 m, 40 m, 50 m, 60 m, 80 m, 100 m

Train Angles

Continuous rotation, 3° increments

Sector Size

Sector Mode:  0° – 180°, 3° increments
Polar Mode:  0° – 357°, 3° increments, or Continuous rotation

Step Sizes

Slow (0.3°), Medium (0.6°), Fast (0.9°), Faster (1.2°), Fastest (2.4°)

Grid Types

Polar and rectangular

File Format

(filename).81a

Recommended Minimum Computer Requirements

100 MHz Pentium
16 MB RAM
1 GB Hard Disk
800 x 600 x 256 colour graphics

Ordering Information

1000 m Unit

881-000-420

3000 m Unit

881-000-421

RS-232

Option               -006

Interface source code in "C" (TEST881A.C)

Option               -018

Pitch, Roll & Heading Sensor

Option               -030
(Included)

Deployment Cone

Option               -052
(Included)

881A Borehole

Features

  • Programmable
  • Multi-frequency
  • High performance
  • Lower cost
  • Low power
  • Simple set-up and installation
  • Digital telemetry
  • 1 m to 100 m operation (full scale)
  • Built-in orientation module (PRH)
  • Communication format available to user

Applications

  • Profiling
  • Offshore Oil & Gas
  • Surveying
  • Dam Face Inspection
  • Underwater Archaeology
  • Scientific Research
  • Drop sonar
  • Borehole Inspection

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