Geometrics G-882 User Manual

1. Ship 1000 tons
0.5 to 1 nT at 800 ft (244 m)
2. Anchor 20 tons
0.8 to 1.25 nT at 400 ft (120 m)
3. Automobile
1 to 2 nT at 100 ft (30 m)
4. Light Aircraft
0.5 to 2 nT at 40 ft (12 m)
5. Pipeline (12 inch)
1 to 2 nT at 200 ft (60 m)
6. Pipeline (6 inch)
1 to 2 nT at 100 ft (30 m )
7. 100 KG of iron
1 to 2 nT at 50 ft (15 m)
8. 100 lbs of iron
0.5 to 1 nT at 30 ft (9 m)
9. 10 lbs of iron
0.5 to 1 nT at 20 ft (6 m)
10. 1 lb of iron
0.5 to 1 nT at 10 ft (3 m)
11. Screwdriver 5 inch
0.5 to 2 nT at 12 ft (4 m)
12. 1000 lb bomb
1 to 5 nT at 100 ft (30 m)
13. 500 lb bomb
0.5 to 5 nT at 50 ft (16 m)
14. Grenade
0.5 to 2 nT at 10 ft (3 m )
15. 20 mm shell
0.5 to 2 nT at 5 ft (1.8 m)
The G-882 system is particularly well suited for the
detection and mapping of all sizes of ferrous objects.
This includes anchors, chains, cables, pipelines, ballast
stone and other scattered shipwreck debris, munitions of
all sizes (UXO), aircraft, engines and any other object
with magnetic expression. Objects as small as a 5 inch
screwdriver are readily detected provided that the sensor
is close to the seafloor and within practical detection
range. (Refer to table at right).
The design of this high sensitivity G-882 marine unit is
directed toward the largest number of user needs. It is
intended to meet all marine requirements such as
shallow survey, deep tow through long cables,
integration with Side Scan Sonar systems and
monitoring of fish depth and altitude.
Typical Detection Range For Common Objects
MODEL G-882 CESIUM MARINE MAGNETOMETER SYSTEM SPECIFICATIONS
OPERATING PRINCIPLE:
Self-oscillating split-beam Cesium Vapor (non-radioactive)
OPERATING RANGE:
20,000 to 100,000 nT
OPERATING ZONES:
The earth’s field vector should be at an angle greater than 10° from the sensor’s equator and greater than 6 away
from the sensor’s long axis. Automatic hemisphere switching.
CM-221 COUNTER
SENSITIVITY:
<0.004 nT/ Hz rms. Up to 20 samples per second
HEADING ERROR:
1 nT (over entire 360° spin )
ABSOLUTE ACCURACY:
<2 nT throughout range
OUTPUT:
RS-232 at 1,200 to 19,200 Baud
MECHANICAL:
Sensor Fish:
Body 2.75 in. (7 cm) dia., 4.5 ft (1.37 m) long with fin assembly (11 in. cross width), 40 lbs. (18 kg) Includes Sensor
and Electronics and 1 main weight. Additional collar weights are 14lbs (6.4kg) each, total of 5 capable
Tow Cable:
Kevlar Reinforced multiconductor tow cable. Breaking strength 3,600 lbs, 0.48 in OD, 200 ft maximum. Weighs 17
lbs (7.7 kg) with terminations.
OPERATING TEMPERATURE:
-30°F to +122°F (-35°C to +50°C)
STORAGE TEMPERATURE:
-48°F to +158°F (-45°C to +70°C)
ALTITUDE:
Up to 30,000 ft (9,000 m)
WATER TIGHT:
O-Ring sealed for up to 4,000 psi (9000 ft or 2750 m) depth operation
POWER:
24 to 32 VDC, 0.75 amp at turn-on and 0.5 amp thereafter
ACCESSORIES:
Standard:
Operation manual, shipping storage container and ship kit with tools and hardware
Optional:
Telemetry to 6Km coax, gradiometer (longitudinal or transverse TVG), aluminum reusable shipping case
MagLog Lite™
Software:
Logs, displays and prints Mag and GPS data at full sample rate. Automatic anomaly detection and single sheet
Windows printer support
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 11/13
GEOMETRICS INC. 2190 Fortune Drive, San Jose, California
95131, USA Tel: 408-954-0522 – Fax: 408-954-0902 – Email:
sales@geometrics.com Web: www.Geometrics.com
GEOMATRIX UK 20 Eden Way, Pages Industrial Park, Leighton Buzzard LU7
4TZ, UK Tel: 44-1525-383438 – Fax: 44-1525-382200 – Email:
chris@georentals.co.uk sales@georentals.co.uk - Web: www.Geomatrix.co.uk

Geometrics G-882 Specifications

General

Brand	Geometrics
Model	G-882
Category	Marine Equipment
Language	English