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ELECTRICAL EXPLORATION TRANSMITTER ASTRA-100

Electrical exploration transmitter ASTRA-100 is designed for producting an electromagnetic field during geophysical survey using the DC current, induced polarization, frequency sounding (including impedance one) methods, etc.

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Electrical exploration transmitter ASTRA-100 is designed for producting an electromagnetic field during geophysical survey using the DC current, induced polarization, frequency sounding (including impedance one) methods, etc.

Application: solving the civil tasks related to studies of the electrical properties of soils and in-situ rocks.

Specifications

 Maximum output power  100 W
 Maximum output voltage  400 V
 Output current and respective ranges of resistance RAB  1.00 mA, 5.0 - 250 kOhms
   3.16 mA, 1.5 - 80 kOhms
   10.0 mA, 0.5 - 25 kOhms
   31.6 mA, 150 - 8000 Ohms
   100 mA, 50 - 2500 Ohms
   316 mA, 15 - 800 Ohms
   1000 mA, 5 - 100 Ohms
 Output current form  'Meander' (bipolar rectangular pulses w/o interval)
 Operating frequencies, Hz  
 First frequency range:  0.019, 0.038, 0.076, 0.153, 0.305, 0.610, 1.221, 2.441, 4.883, 9.766, 19.53, 39.06, 78.13, 156.3, 312.5, 625.0
 Second frequency range:  0.021, 0.032, 0.042, 0.063, 0.083, 0.125, 0.167, 0.250, 0.333, 0.500, 0.667, 1.000, 1.333, 2.000, 2.667, 4.000, 5.333, 8.000, 10.67, 16.00, 21.33, 32.00, 42.67, 64.00, 85.33, 128.0, 170.7, 256.0, 341.3, 512.0
 Performance  up to 80%
 Acceleration time at active load  2 sec
 Operatig temperature runge  from -20°C up to +50°C
 Power supply voltage  ≈ 12 V (min 9.5 V, max 15.5 V)
 Weight (w/o battery)  2 kg
 Dimensions  200 x 173 x 113 mm
 Alphanumeric LCD  4 lines x 16 symbols
 Alphanumerical indication:  - operating frequency
   - output current value
   - storage battery voltage
   - status (standby, operation, discontinity of power line (AB), low supply voltage)
   - load resistance
   - output voltage
 Sound indication  operation - discontinuity of power line (AB)
 Sealed case  IP65 standard