Zonge - Model GGT-3 -Geophysical Transmitter
Constant current supply, Used for time / frequency domain IP Resistivity, CR, TEM, CSAMT, Broad-band: DC to 8 kHz (standard), Output up to 1000 V, 15 A, Fast turn-off time: 125 μsec (300 x 300m loop), Drives a loop or grounded dipole, Sealed construction for operation in wet environments, Compact modular design, Optional internal time base
Description: Broadband, constant-current, time and frequency domain, backpackable geophysical transmitter
Enclosure: Welded, hardened aluminum frame mounted in a durable aluminum case.
Size: 38 x 25 x 61 cm (15 x 10 x 24 in)
Weight: 30 kg (66 lb)
Operating temperature: -40° to +55°C (-40° to +130°F)
Operating humidity: 0 to 90%, non-condensing
Electrical Characteristics
Drives a loop or grounded dipole
Turnoff time: Under 10 μsec for a resistive load; 125 μsec for a 300 x 300 m loop (16 ohms resistance, full current)
Maximum input: 3.5 KVA @ 30°C
Output voltage range: 50 to 1000V
Output current range: 0.1 to 15A
Current stability: ±0.1%
Frequency range: DC to 8 kHz
Switching Control
Switching controlled by external device
Recommended transmitter controller: Zonge XMT-32
Waveform type: Capable of virtually any type of pulse waveform, limited by external controller device
Controls
Power ON / OFF
Current adjust pot, continuously adjustable, locking
Voltage range switch (50-125V, 100-250V, 200-500V, 450-750V, 700-1000V)
Loop / Dipole select switch
Displays
Analog input voltage meter, 0-150 V
Analog output voltage meter, 0-1000 V
Power On / Off lamp, transmit lamp, output lamp
Output current LCD (±0.01A)
Indicator lamps:
Control Power ON
Transmit ON
Fan ON
Transmit Polarity
Fault indicator lamps:
Supply and output overvoltage
Alternator voltage
Open output
Input and output overcurrent
Over temp
End of regulation
Output Jacks
Current calibrate terminals (100 mV/A)
Output current terminals
Grounding jack
Power
Three-phase, 120 VAC, 400 Hz
Recommended motor generator set: Zonge ZMG-3 or BMG-3
Power connector: Four-pin military screw-type with locking ring
Options
Spare parts kit (standard and extended kits available)
Current monitor isoamp module
Resistor load bank
Switch box for rapid switching of dipole pairs
Pack frame