OBX2-90
Deepwater OBX2-90 Ocean Bottom Recorder
PRODUCT DETAILS
The OBX2-90 is designed for extended-duration seabed ocean bottom seismic data acquisition. Nodes can be deployed in depths down to 3,450 meters with continuous recording for up to 90 days.
FEATURES
- Continuous cable-free 4C autonomous recording
- Battery module: 90 days operation
- Built-in full resolution test generator
- Solid-state flash memory: 16 GB per channel
- CSAC clock
- Built-in heading sensor
- 3 Component Magnetic Sensor
- ±5° Accuracy
- Measurements written to header every 2,000 samples
GS-ONE Omni Geophone
PHYSICAL SPECIFICATIONS
|
Moving Mass |
13.2 g |
0.466 oz |
|
Maximum coil excursion p-p |
4.06 mm |
0.16 in. |
|
Minimum coil excursion p-p |
1.02 mm |
0.04 in. |
|
Diameter |
30.5 mm |
1.2 in. |
|
Height |
40.7 mm |
1.6 in. |
|
Weight |
130 g |
4.60 oz |
|
Operating and Storage Temperature Range |
–40°C to +100°C |
–40°F to +212°F |
ELECTRICAL SPECIFICATIONS
|
All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated. |
|
|
Frequency |
15 Hz |
|
Spurious Frequency |
>160 Hz |
|
Distortion at Horizontal |
0.05% Typical |
|
Coil Resistance |
1450 Ω |
|
Sensitivity at 70% Damping |
69.2 V/m/s (1.75 V/i/s) |
|
Open-Circuit Damping |
70% |
|
Distortion at all tilt angles |
<0.2% measured at 15 Hz with 0.2 in/s p-p |
Deepender™ 5000-X Hydrophone
PHYSICAL SPECIFICATIONS
|
Maximum Operating Pressure |
34.5 MPa (5,000 psi) |
|
Maximum Working Depth |
3450 m (11,319 ft.) |
|
Operating Temperature Range1 |
–10 to +75°C (+14 to 167°F) |
|
Outside Diameter |
50.8 mm (2.0 in.) |
|
Length |
38.1 mm (1.5 in.) |
ELECTRICAL SPECIFICATIONS
|
Nominal Capacitance (at 25°C 1atm) |
20.0 nanofarads |
|
Voltage Sensitivity2 |
4.0 μV/μBar |
|
Sensitivity (dBv ref 1μPa @ 25°C) |
–181.9 dB re 1nC/μPa +/- 1.5dB |
|
Frequency Response (into 2 MΩload) |
3 –15,000 Hz |
1. Safe to be used slightly below 0°C as long as water is not frozen. Do not let hydrophone be frozen in ice, as this will cause irreversible damage to the crystals.
2. Voltage Sensitivity is specified when connected to OBX.
OBX2-90
|
MECHANICAL SPECIFICATIONS (HOUSING) |
METRIC |
US |
|
Length |
475 mm |
18.7 in. |
|
Width |
208 mm |
8.2 in. |
|
Height |
106 mm |
4.25 in. |
|
Weight in Air |
16.5 kg |
36.4 lbs. |
|
Weight in Seawater |
9.1 kg |
20.0 lbs. |
|
Maximum Operating Pressure |
34.5 MPa/345 Bar |
5,000 psi |
|
Maximum Operating Depth |
3,450 M |
11,316 ft. |
|
Operating Temperature Range |
–5°C to +60°C |
+23°F to +140°F |
|
Storage Temperature Range |
–10°C to +60°C |
+14°F to +140°F |
|
ELECTRICAL SPECIFICATIONS |
|
|
Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer 3C Orthogonal oriented GS-One OMNI 15 Hz Geophones 1 DEEPENDER Hydrophone |
|
|
Digitization |
24-bit Delta-Sigma |
|
Sample Interval |
0.25, 0.5, 1, 2, 4 ms |
|
Pre-amplifier Gains |
0, 6, 12, 18, 24, 30, 36 dB |
|
Maximum Input Signal |
1.8Vrms |
|
Equivalent Input noise (@2ms sample interval) |
0.17 μVrms |
|
Gain Accuracy |
Better than 1% |
|
Anti-alias Filter |
83% Nyquist |
|
Instantaneous Dynamic Range |
124dB @ 2 ms sample interval |
|
THD |
<0.2% |
|
Distance Between Digitizer & Farthest Sensor |
<18 cm |
|
Distance Between All Sensors |
<13 cm |
|
Flash Memory |
16 GB per channel |
|
Frequency Response |
1 Hz – 1650 Hz @ ¼ ms sample interval |
|
Battery Module |
90 days operation |
|
CLOCK SPECIFICATIONS |
||||
|
Days |
30 |
60 |
90 |
100 |
|
Max Uncorrected Drift |
2ms |
8ms |
17ms |
21ms |
|
Corrected Drift |
<.25ms |
<.5ms |
1ms |
1ms |
