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HIGH FREQUENCY LOW NOISE SEARCH-COIL
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Three-axis search-coil magnetometer (SCM)
LEMI-157 is intended for the measurements of the three
orthogonal components of magnetic field fluctuations in the frequency band 1 ...
100 kHz during high
frequency geophysical studies. It can be used with any analogue measuring unit.
| Frequency band of received signals | 1 - 100 kHz |
| Shape of transfer function | flat |
| Transformation factor1 | 25 mV/nT |
| Transformation factor error | < 6 dB |
| Crosstalk | < 10 % |
| Magnetic noise level at 1 kHz, at 10 kHz, at 20 kHz at 100 kHz |
≤ 0.1 pT/√Hz ≤ 0.05 pT/√Hz ≤ 0.03 pT/√Hz ≤ 0.03 pT/√Hz |
| Power supply voltage2 | ± (7.5…12) V |
| Maximum output voltage | ± 2 V |
| Power consumption | <0.6 W |
| Temperature range of operation | minus 20 to + 50 oC |
| Outer dimensions | 50x50x50 mm |
| Weight | < 0.3 kg |
Notes:
1 The transfer function is experimentally derived and its values are
given in the User Manual.
2 Power supply voltage must not exceed ±8 V at the use of the 50 Ohm
load in order
to avoid preamplifier overheating.
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