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AUTONOMOUS METEOMAGNETIC STATION LEMI-017

Main features:

bulletHigh resolution and accuracy
bulletLow noise
bullet3 magnetic channels, 2 tilt channels, atmospheric pressure and temperature channels
bulletMagnetic sensor with levelling facilities
bulletVery low temporal and thermal drift
bulletLow power consumption
bulletUp to 2 GB CompactFLASH card
bulletSatellite synchronization
bullet4-lines digital display
bulletRS - 232 (RS - 422) outputs
bulletWaterproof construction

LEMI-017
Meteomagnetic station LEMI-017

LEMI-017
Main window of LEMI-017.exe program

 

LEMI-017 digital seven component MeteoMagnetic Station (MMS) (three magnetic + 2 tilt + atmospheric pressure + temperature channels) is intended for the measurement of natural magnetic field components and their variations in laboratory and field conditions, atmospheric pressure and air temperature. Its major advantages are very low power consumption, temporal drift and high accuracy of measurements, what makes it especially efficient for long term monitoring. The magnetometer is produced on the base of flux-gate sensor, all three components of which are implemented in the same thermostable housing. The pressure meter is based on precise tensoresistive sensor produced by industry. The temperature meter is made on the base of thermoresistor. The electronic unit allows acquisition, processing and storage of data about all parameters variations to the internal FLASH memory and their transmission to the computer via RS-232 interface. Built-in GPS receiver provides satellite synchronization of the internal clock and the coordinates of the MMS location. MMS operation algorithm allows organizing both autonomous and synchronous operation of a set of the MMS installed at the studied area.

Innovative Aspect and Main Advantages

Its major advantages are very low temporal drift and high accuracy of measurements, what makes it especially efficient for long term monitoring. LEMI-017 provides simultaneously measurements of 3 magnetic field components, atmospheric pressure, temperature and flux-gate sensor tilts with high resolution and allows one to determine a correlation of these parameters. The station does not require the precise flux-gate sensor orientation.

Areas of Application

LEMI-017 can be used as the equipment of autonomous weather stations, which is able to register data during 512 days with the purpose of magnetic field, atmospheric pressure and temperature correlation study.

TECHNICAL SPECIFICATIONS

Three component magnetometer

Magnetic field measurement range for each component 68000 nT
Noise level at flat part of frequency response < 8 pT rms
Frequency band  (DC-0.3) Hz
Temperature non-stability < 0.2 nT/oC
Long-term non-stability < 5 nT/year
Magnetic sensors non-orthogonality error less than    < 30 min of arc

Pressure meter

Atmospheric pressure measurement range 300-1200 mbar

Temperature meter

Temperature measurement range (-40+70) oC
Temperature measurement error 0.1 oC

Two component tilt meter

Tilt measurement range 15 arc degrees
Tilt measurement error 0.01 arc degrees
Sample rate 1 samples per second
CompactFLASH Card memory capacity (FAT16) 2 GB
Power consumption less than 0.8 W
Length of connecting cable between magnetic sensor and electronic unit 10 m
Length of connecting cable between GPS antenna and electronic unit 3 m

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Last modified: 03-11-2014

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