Atec G-856AX User Manual

Portable Proton Magnetometer

Model G-856AX

 0.1 nT resolution and sensitivity

Designed for ease of use by non­skilled personnel

 Digital memory - 12,500 readings
 Manual data recall, or down load

to a PC

 Versatile, total field, gradiometer

or base station use

 Rugged weatherproof

construction.

unit provides a repeatable absolute total field
magnetic reading, traceable to the National
Bureau of Standards, unlike other magnetic
field measurement processes which measure
only a single component of the field.

Applications:

The G-865AX is ideal for mapping geological
structures, for mineral exploration, magnetic
search for industrial, environmental or
archaeological targets. The optional
gradiometer attachment gives greater resolution
and noise immunity for conducting searches in
industrial or high cultural noise environments.
Simple operation, large digital data storage
capability, and the inclusion of MagMap2000
data transfer and editing software provides a
system well suited for both teaching and survey
applications.

The automated cycling option with long
sensor cable and external power connection
allows use of the G-856AX as a base station
unit for the measurement of diurnal changes

in the earth’s magnetic field. Diurnal

correction data is then downloaded by
MagMap2000 and can be applied to other
856, 858 or 822/823 airborne data.

The G-856 provides a reliable, low cost
solution for a variety of magnetic search and
mapping applications. Single key stroke
operation means the G-856AX can be operated
by non-technical field personnel or used in
teaching environments. The G-856AX uses the
established proton precession method,
allowing accurate measurements to be made
with virtually no dependence upon variables
such as sensor orientation, temperature, or
location. The

G-856 Console and Sensor

Superior Data Editing Software:

MagMap2000 allows rapid download of the
data from the G-856AX to a PC. Data can be
diurnally corrected, profile lines and positions
displayed and edited, noisy readings filtered and
QC plots of profiles, 2D contour and 3D
surface plots made. Data can be exported to
Surfer, Geosoft or MagPick (free from
Geometrics) for more sophisticated final maps
and analysis. The software requires Windows
98, NT or XP operating system.

MagMap2000 Display Screen

A thoroughly well proven design (over 2,600
units sold), excellent performance and the
lowest price professional system are key
features of the G-856AX. Combined with the
ease of use, user friendly download/editing
software, and readily available commercial
contouring programs, the G-856AX represents
a complete magnetic surveying package
generating high quality data for budget
conscious users.

G-856AX Desert Survey in Tibet

Specifications:

Resolution: 0.1 nT
Accuracy: 0.5 nT
Clock: Julian date, accuracy 5 sec per

month.

Tuning: Auto or manual, range 20,000 to

90,000 nT

Gradient Tolerance: 1000 nT/meter
Cycle time: 3 sec to 999 sec standard , can be

manually selected as fast as 1.5
sec cycle time.

Read: Manual, or auto cycle for base

station use.

Memory: 5700 field or 12500 base station

readings

Display: Six digit display of field/time,

three digit auxiliary display of line
number, day

Digital Output: RS-232, 9600 baud.

Input: Will accept external cycle

command.

Physical: Console: 7 x 10.5 x 3.5 inches,

(18 x 27 x 9 cm) 6 lbs (2.7 kg)
Sensor: 3.5 x 5 inches ( 9 x 13

cm) 4 lbs (1.8 kg Environmental:

Meets specifications within
0° to 40°C (32° to 105°F)
Will operate satisfactorily from

-20° to 50°C (-40 to 122°F)

Power: 9 each 1.5 “D” Cells or Gel Cell
Standard Accessories:

Sensor, Staff, Chest Harness, Two
sets of batteries, RS-232 cable,
Operations manual, Applications
manual, MagMap96 software

Options: Gradiometer attachment. External

Power/sensor cable, External
power/RS-232/sensor cable,
rechargeable battery and charger
set.

For More information contact:

GEOMETRICS INC.

2190 Fortune Drive, San Jose, California 95131,
USA

Tel: [phone]
Fax: [phone]

Email: [e-mail]