WinFrog User’s Guide - Appendix C – Magnetometer / GSM-19 Page 1 of 5
WinFrog Device Group: Magnetometer
Device Name/Model: GSM-19 (GSM-19M or GSM-19MD)
Device Manufacturer:
MARINE MAGNETICS CORPORATION
(formerly GEM Systems Inc.)
52 West Beaver Creek Rd., Unit 14/16,
Richmond Hill Ontario, Canada, L4B 1L9
Phone: (905) 764-8008, Fax: (905)764-2949
www.marinemagnetics.com
Device Data String(s)
Output to WinFrog:
RS-232 ASCII output
Time = gpstime, else time is read from
magnetometer as hours, minutes, seconds.
Other parameters read for GSM19M: measurement
time, and magneticField.
Other parameters read for GSM-19MD:
magneticField, signal strength, depth of fish, leak,
measurement time, quality, warning message and
status.
See Configuration Details for Warning Messages.
WinFrog Data String(s)
Output to Device:
N/A
WinFrog Data Item(s) and their
RAW record:
MAGNETOMETER 800
DEVICE DESCRIPTION:
A magnetometer is an instrument that measures Magnetic Flux Density (in Tesla’s). The
Earth generates a relatively strong magnetic field, which produces flux densities, in air
or water. The values of the earth’s magnetics range from a low of about 18 microTesla
(µT) near South America, to a high of over 60 microTesla in the Arctic Circle.
The GSM-19 Marine Magnetometer utilizes an omnidirectional Overhauser sensor and
can be configured to operate via the Overhouser effect or as a conventional proton
precession unit. See Configuration Details section for information on the Overhauser
effect.
The GSM-19 consists of one Overhauser sensor, an electronic ‘fish’ assembly and an
FSK transceiver unit. The fish and sensor are packaged in a sealed container with a