Geometrics Memory-Mag G-856AX, Operation Manual

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Geometrics, Inc
.
G-856AX Operation Manual
26
Before setting the G-856AX for automatic reading as a base station instrument, make
sure that console’s internal clock is set correctly. Then, to select automatic model and the
reading interval press:
AUTO, SHIFT ‘n’,’n’,’n’ , ENTER
The value “nnn” is the number of seconds between automatic measurements. You can
examine the current measurement data while the G-856AX is operating in automatic
mode. To do this press
RECALL and FIELD - or TIME - as desired. The Julian day
will be displayed if TIME is selected. Alternatively you can simply press TIME and the
field/time display will light showing the current console time and the Station/day display
will show the line number.
To shut off Automatic Mode, press:
AUTO, CLEAR
The displays will go blank and Auto Mode will be shut off.
The absolute minimum time required to obtain and store a reading 3 seconds. In order to
set the magnetometer to cycle at 3 seconds, the “Display off after 5 minutes” and “Short
Count Gate” functions must be set on the console’s internal DIP switches. (See Table 4 in
the Appendix for additional information.) If the selected cycle time is less than 10
seconds then there will be a slight delayed action when commands are keyed. This is
because the console processor will be busy taking readings and displaying the results.
You may find that you will need to hold down the
AUTO key and then hold down the
CLEAR key for one complete cycle in order for the command to be accepted.
Pressing the OUTPUT
,
READ
,
or STORE keys, or attempting to change the sample
interval while the G-856AX is recording automatically will produce an ERROR message
but will not affect operation in any other way.
10 - Retrieving magnetic field readings
Data can either be retrieved manually or automatically. To begin automatic data retrieval
start by connecting the RS-232 serial download cable to the console. Next, plug the
cable’s opposite end into the serial port of your MS Windows computer. If your
computer is not equipped with a serial port then it will be necessary to obtain an adapter
that will allow connection of the serial cable; e.g. a serial to USB adapter.
We recommend using Geometrics MagMap2000 program to retrieve and process the data
stored in the G-856AX. If you have installed this software you should run it now. (See
the MagMap2000 operation manual or the Data Retrieval chapter for installation and
specific operating instructions.) When prompted by MagMap2000, or when your
computer is ready to receive data from the G-856AX press:
OUTPUT , ENTER