Description - Sam -III Construction Manual

The basis for the SAM-III is a fluxgate magnetometer sensor manufactured by Speake & Co Llanfapley.
The sensor signals are processed on the signal processor module, which uses a Microchip PIC16F877
microprocessor. The microprocessor provides serial data, analog and alarm outputs. The basic
specifications for the SAM-III magnetometer system are
• Range: Approximately ± 50000 nT
•
Resolution: 1 – 2 nT
•
Connection of 1, 2 or 3 sensors
•
Microprocessor controlled, 16 MHz clock
•
Data displayed on backlit 4x20 LCD (STN yellow/green standard)
•
Measured data transmitted over EIA-232 serial interface as ASCII text
•
K-Index available on one analog output (adjustable 0 ...+5 V or -2.5 ...+2.5 V)
•
Real-time clock with backup battery
•
Form A relay output for K-index alarm (maximum contact rating 200 V dc or V ac-peak, 1.0 a dc
or a ac-peak, in a combination not exceeding 20 w)
•
Opto-isolated input for detection of external voltage condition to deactivate measurements
•
Software setup and measurement logging via EIA-232 serial interface
•
Power: 12 V dc at 60-100 mA (depending on number of sensors connected)
•
Dimensions (optional enclosure): 200 mm x 112 mm x64 mm
•
Temperature sensing capability
•
Connectors:
•
I/O: Pluggable terminal block, 8-pin
•
Sensor: Pluggable terminal block, 10-pin
•
EIA-232: DB-9M
•
dc power coaxial 2.1 mm x 5.5 mm, center +
•
Keyboard controls:
•
Command mode (F1)
•
Calibration mode (F2)
•
Software reset (F3)
•
Display backlight (F4)
•
Application software:
•
SAM_VIEW
•
SAM_INI
•
SAM_BROWSER
•
SAM_STAT
See last page for document and copyright information, File: SAM-III Magnetometer Construction.doc, Page 1
SAM-III Construction Manual
I.

Description

The 3-axis Simple Aurora Monitor magnetometer system (SAM-III)
was designed by Dirk Langenbach (hardware) and Karsten Hansky
(software). It is based on the 2-axis SAM. A schematic is provided at
the end of this document.