Geometrics Memory-Mag G-856AX, Operation Manual

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Geometrics, Inc
.
G-856AX Operation Manual
33
Data Retrieval
This chapter describes procedures for transferring data from the G-856AX console and
describes the manual transcription of data if no PC computer is available. Before
beginning retrieval of data, be sure to check that the console batteries have sufficient
charge. Failure to do this could result in incorrect or incomplete data transfer. A simple
test of the battery voltage can be performed by pressing
READ
when the sensor is not
attached to the console. Under these conditions a voltage greater than or equal to 9.0
volts will indicate that there is adequate charge for trouble-free data transfer.
Computer connection and download
The G-856AX is designed to be used with personal computer running one of the MS
Windows operating systems. Geometrics provides its MagMap2000 software to facilitate
data download from the G-856AX and for processing the measurement results.
A serial download cable is included with the G-856AX. This cable is used to
interconnect the magnetometer console’s front panel connector with the serial port on a
Windows PC. When you are ready to download data from the console connect the
download cable to console’s front panel connector and to the PC’s serial port. (Note:
some PC computers are not equipped with serial ports. If this is the case, you will need
to connect an adapter – e.g. a USB-serial port converter)
We recommend that you use the MagMap2000 software supplied with the magnetometer
to facilitate data retrieval and processing. To do so, under the MagMap2000 File menu
item select “import G-856 data”. A dialog box will appear that allows you to 1) select the
computer’s communication port that is connected to the magnetometer, 2) select the Baud
rate, and 3) set the file name/directory for the data storage. When you have finished
entering this information press the “DOWNLOAD NOW” button. Then on the G-856AX
console press
OUTPUT
and
ENTER
. MagMap2000 should display a dialog box that
shows the progress of data transfer from the magnetometer console to your computer
MagMap2000 offers may advantages. These include data download, profile plotting,
filtering, contouring plotting and the diurnal correction of survey measurements using
base station data. The latest version of MagMap2000 can be downloaded free of charge
from our website (
www.geometrics.com ). The complete operating manual for this
program is included in the software as an Adobe PDF document. If necessary you can
download the free Adobe Acrobat Reader from
www.adobe.com .
The following is a brief description of data download and processing using
MagMap2000:
1. Download the G-856AX data using a RS-232 interface at 9600 baud. This takes
about 10 minutes if the memory is full of survey data (5700 readings) or about 20
minutes if the memory is full of base station data (12,500 readings). The same