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EREV-CS Base Station Cesium Optical Pumping Magnetometer
EREV-CS Base Station Cesium Optical Pumping Magnetometer

Mainly used as a daily monitoring base station or a fixed-point.

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Introduce

EREV-CS base station cesium optical pumping magnetometer is mainly used as a daily change monitoring base station or a fixed-point continuous acquisition instrument. It can be widely used in various high-precision magnetic surveying projects. It is equipped with a built-in GPS module as standard, and has the wireless networking function of multiple instruments.

Applications

  • High-precision daily variation monitoring
  • high-precision magnetic surveying and prospecting
  • Magnetic basement and structure detection
  • Earthquake precursor and volcano precursor observation and other industries.

Features

  • EREV-CS adopts GPS timing function to ensure that the time of all instruments is exactly the same.
  • EREV-CS is easy to operate and can collect precise magnetic field values with just one keystroke.

Technical Parameters

Northern hemisphere working angle range

10°-85°

Southern hemisphere working angle range

170°-95°

Absolute accuracy

General less than 0.05nT

Sensitivity

0.0006 nT√Hz rms; 1Hz to 2Hz bandwidth peak-to-peak less than 0.003nT

Resolution

0.001nT

Dynamic range

10,000nT-100,000nT

Gradient tolerance

40,000nT/m

Sampling rate

1-60Hz or user selectable

Sampling mode

Continuous acquisition, gradient continuous acquisition

GPS

GPS(Built-in Systems), positioning accuracy of 2.5 meters, timing accuracy of 10-9 seconds

Wireless communication

900MHz, 6.4km under normal conditions

Storage medium

Built-in 16GB SD card, customers can choose 32GB or 64GB large-capacity memory card

Data transmission

USB cable

Battery indicator

Built-in 12V, 114Ah non-magnetic lithium battery; support external battery mode

Operating Temperature

-40-70

Weight

Consoleabout 12Kg (including battery)

Sensor0.8Kg

Dimensions

Console:470mm x 357mm×176mm(L*W*H)

Sensor :φ63.5mm x 160mm

Data extraction software

Self-contained

Data preprocessing software

Erev OGM-link including diurnal correction processing, moving average filter , bad point deletion, averaging the same points, instrument noise calculation, drawing profile map, track back, support GPS format conversion

Example

On May 29, 2020, two EREV-CS base station cesium optical pump magnetometers were used to conduct static tests and comparisons with EREV-1+ proton magnetometers in the Ming Tombs area of Beijing. The EREV-CS sample rate is 5Hz, and the EREV-1+ sample rate is 3 seconds.


Instrument

Static Noise (nT)

EREV-1+

0.088513

EREV-CSQ3

0.004812416

EREV-CSQ4

0.00478403

From the test results, in the field environment of the Ming Tombs, the static noise of the 5Hz sampling of EREV-CS can reach 0.004nT.

Calculate the mean value of the deviation of the gradient values between the two probes = 0.055 nT.

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