Geometrics, Inc. G-824A Magnetometer Manual
19
The CM-321 may be configured with default settings specific to your survey requirements,
with settings saved in internal flash RAM. When reset to default factory configuration the
CM-321 counter module has the following setup parameters:
Baud rate: 9600 baud, 8 data bits, no parity, 1 stop bit
Cycle rate: 10 Hz
Master Preamble character set to, $.
Magnetometer Field: Field enabled with ######.#### format.
Postamble character string set to CR LF, e.g., ASCII 13 (decimal) and ASCII 10
(decimal)
Output Format: ASCII
The default output data stream contains all printable ASCII characters with each sample
terminated with a carriage return/line feed sequence. Table 5 illustrates an example of this
format.
Character
#
Description
1
An ASCII '$' (marks first character of data stream)
2
An ASCII '1' or a blank (depending on whether Mag reading is above or below
99999.999nT).
3-7
5 digits of Mag data
8
An ASCII decimal point ['.']
9-12
4 additional digits of Mag data
13
an ASCII carriage return
14
an ASCII line feed
If the data were captured to a file and then printed the output would look like this:
$ 99778.1314
$ 99890.3762
$ 99955.5171
$ 99998.2933
$100078.8356
$100032.0718
$ 99979.1595
$ 86778.5089
$ 78778.2166
$ 69978.3474
Table 5. Example of CM-321 default output data stream.
