Mainly used as a daily monitoring base station or a fixed-point.
Contact usEREV-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
Features
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 | Console:about 12Kg (including battery) Sensor:0.8Kg |
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-CS(Q3) | 0.004812416 |
EREV-CS(Q4) | 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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