Atec Geometrics-G-882TVG - Manual

G-882TVG CESIUM MAGNETOMETER
& TRANSVERSE GRADIOMETER
• Marine Search Applications for UXO, pipelines, lost
objects with Multi-Sensor Array Capability
• High Sensitivity ─ 0.004 nT/sq-rt-Hz RMS with dual
CM−221 Larmor Counters
• Very Low Heading Error ─ ±0.25nT over 360˚
equatorial and polar spins
• Versatility ─ CM-221 counter includes 8 channel 12
bit A to D converters for real time internal
diagnostics, digital data stream concatenation,
and short, long or telemetry over coax options
• Reliability and Ruggedness – Cesium
magnetometers never need be returned to factory
for calibration or tuning. Designed for tough
environmental conditions and high “G” loads
• Gradiometer arrays offering simultaneous operation of up to 8 separate sensors using the
designed-in multi-sensor data concatenation of the CM-221 internal counter
• Geometrics offers complete turnkey systems including tow cables, gradiometer wing, digital data
acquisition systems with real time anomaly detection, GPS navigation and post acquisition data
processing software and training.
The Geometrics Model G-882TVG Transverse
Gradiometer system mates the well- proven high-
performance cesium sensor with dual high
sensitivity and high speed CM-221 Larmor
Counters. This advanced integrated
magnetometer system provides unmatched
versatility in performance, with a wide sensor
separation for maximum target detection efficiency
and survey cost effectiveness.
The system comprises a transverse wing and two
G-882 Cesium Vapor magnetometer fish with
stabilizer weights and fins. Tow cables may be up
to 150m in length with standard power supply or
up to 700m with a high capacity voltage sense
supply. Depth sensors provide gradiometer
attitude and depth information to the operator
depth and an echo-sounder altimeter provides
height above sea floor for proper system flight
control.
Dual sensors are synchronized to 1ms sampling
and data is transmitted via RS-232 for recording by
any standard PC computer using our industry
standard MagLogLite software. High sample and
data transmission rates (up to 40 samples per
second) are standard.
The G-882G provides sensitivities of 0.004 nT/√Hz
RMS or approximately 0.01 nT P−P at 10 Hz,
selectable via software command for detection of
the smallest anomalies. MagLog software
computes the transverse difference for display and
analysis in real time, using the customer supplied
GPS for interpolation and target positioning.
The system's high performance is excellent for the
detection and delineation of cables, pipelines,
environmental, archaeological or military UXO and
EOD targets.