Geometrics Memory-Mag G-856AX, Руководство по эксплуатации

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Geometrics, Inc
.
G-856AX Operation Manual
45

Space - 1

Julian day - 3

Space - 1

Time - 6

Space - 1

Station number - 4

Space - 1

Field - 6

Carriage return, line feed - 2
c. After all data has been transferred by the G-856AX, a final character (ASCII
EOT) is transmitted.
d. Transmission of data is initiated as follows:

Press
Output , Enter

Optionally you can press
Shift
,
‘n’, ‘n’, ‘n’, Enter
; to begin output from station
number “nnn”.
External Power
The G-856AX may be powered from an external source. It will be necessary to operate
from external power if the internal batteries are not sufficient for some nonstandard
application such as: extremely cold weather operation, extended use of the
magnetometer’s three-reading average capability, long-polarize operation, or as a long
term base station. The instrument may be run safely from a suitable external supply as
high as 18 volts for improved signal to noise ratio. Note that the external power supply
can be a source of interference if it is not well regulated and this may reduce signal
quality.
To operation from external power, connect the positive terminal of the external source to
pin R, and the negative terminal to pin D (ground). Alternatively you can obtain an
external power/signal/data cable from Geometrics (P/N 16652-05). If you plan to
construct your own external power cable we recommend including a 1.5-2 Ampere fuse
in the power input line.
External magnetometer control
Momentary connection of pin S (SYNC) to pin D (Ground) at the front panel connector
will set the magnetometer to take a reading and store it automatically. This feature is
provided so that an external device can be used to control operation of the magnetometer
and, if desired, synchronized the readings with some other device. This feature can be
used to connect two G-856AX magnetometers so that their readings will be made
simultaneously. In a small-area survey (most commonly used in archaeological and some
engineering applications) a long cable can be run from the survey instrument to the base