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G-856
Portable Magnetometer |
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The G856
provides a reliable, low cost solution for a variety of magnetic search and
mapping applications. Single key stroke operation means the G856AX
can be operated by non-technical field personnel or used in teaching
environments. The G856AX uses the well proven proton precession technology,
allowing accurate measurements to be made with virtually no dependence upon
variables such as sensor orientation, temperature, or location. The unit
provides a repeatable absolute total field magnetic reading, traceable to
the National Bureau of Standards. |
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Applications:
Current primary application for the G-856AX is as a basestation system
for monitoring and recording of the earth's dirunal field shift.
This base data is downloaded into MagMap2000 for automatic correction of
G-865AX, G-858 or airborne survey data. A standard accessory package with external power and 50 ft. sensor cable is available for basestation
operations.
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The G-856AX is
also used in 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.
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A thoroughly well proven
design (over 2,500 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.
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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
Will operate satisfactorily from -20 to 50 C
Power: 9 each 1.5 "D" Cells
Standard
Accessories:
Sensor, Staff, Chest Harness, Two sets of batteries, RS-232 cable,
Operations manual, Applications manual, MagMap 96 software
Options:
Gradiometer attachment. External Power/sensor lead, External
power/RS-232/sensor
lead, rechargeable battery and charger set
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