North-West Ltd. - EM surveying Provider

"Astra-100"

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Transmitter "Astra-100" is designed for different geophysical methods including DC apparent resistivity measurements, induced polarization measurements, frequency sounding and others.
This transmitter can be applied to solve different geotasks such as studying electrical properties of soils and rocks. None of the components of the transmitter or technical ideas are confidential. The exploitation of the transmitter does not lead to any negative ecological consequences.

Specifications

Max. output power	100 W
Max. output voltage	250 V
Output current values and corresponding resistance range RAB	1.00 mA, 5.0 - 250 kΩ 3.16 mA, 1.5 - 80 kΩ 10.0 mA, 0.5 - 25 kΩ 31.6 mA, 150 - 8000 kΩ 100 mA, 50 - 2500 kΩ 316 mA, 15 - 800 kΩ 1000 mA, 5 - 100 kjΩ
Output waveform	Rectangular pulse
Frequency list:	0.076, 0.153, 0.305, 0.610, 1.22, 2.44, 4.88, 9.77, 19.5, 39.1, 78.1, 156, 313, 625, 1250, 2500 Hz 0.042, 0.063, 0.083, 0.125, 0.167, 0.250, 0.333, 0.500, 0.667, 1.00, 1.33, 2.00, 2.67, 4.00, 5.33, 8.00, 10.7, 16.0, 21.3, 32.0, 42.7, 64.0, 85.3, 128, 171, 256, 341, 512, 683, 1024, 1365, 2048 Hz
Efficiency:	To 80 %
Stabilization fault on active load	0.5 %
Fall time on active load	2 mcs
Temperature range	from - 20°C to + 50°C
Power supply voltage	~ 12 V (min 9.5 V, max 15.5 V)
Weight (without power supply)	~ 2 kg
Size	200 x 173 x 113 mm
LCD Panel	4 lines x 16 symbols
Indication	- work frequency - output current - the voltage of power supply - status (wait, work, line break) - load power
Sound indication	- generating - overload - underload (e.g. short circuit) - low power supply voltage
Keyboard	12 button
I/O	- AB - shunt 1 kΩ - synchronization - power supply
Case design	Standard IP-65, Waterproof