Description
The GGT-10B is a broadband, constant-current, time and frequency domain, medium-power geophysical transmitter. It is designed for versatility in geophysical surveys, supporting applications such as time/frequency domain IP, resistivity, controlled source audio magnetotellurics (CSAMT), and transient electromagnetic methods (TEM). The GGT-10B features a robust, anodized blue aluminum enclosure that ensures durability and reliability across various environmental conditions.
Features
- 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, 25 A
- Fast turn-off time: 125 µsec (300 x 300 m loop)
- Drives a loop or grounded dipole
- Efficient, modular design
- Rugged design reliable in all climates
- Optional internal time base
Specifications
General
- Enclosure: Anodized blue aluminum case
- Size: 55.9 x 40.6 x 35.6 cm (22 x 15 x 14 in)
- Weight: 48.6 kg (107 lbs.)
- 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: 10KVA @ 30°C
- Output voltage range: 50 to 1000V
- Output current range: 0.2 to 20A
- Current stability: ±0.2%
- Frequency range: DC to 8 kHz
Switching Control
- Switching controlled by external device
- Recommended transmitter controller: Zonge XMT, GDP, or ZEN
- Waveform type: Capable of virtually any type of pulse waveform, limited by external controller device
Controls
- Power ON / OFF (Key for lock out/tag out)
- Transmit / Reset switches
- Current adjust pot, continuously adjustable, locking
- Voltage range TAP switch
- 50-250V
- 200-500V
- 450-750V
- 700-1000V
- 2A / 20A range select switch
- Emergency Stop Switch
Displays
- Analog input voltage meter, 0-150 V
- Analog output voltage meter, 0-1000 V
- Power On / Off LED, Transmit LED, Output LED
- 3&1/2 Digit Operating Information Display
- Output current
- Loop turnoff time (µseconds)
- Transformer temperature (°C)
- Input power (KW)
- Indicator LEDs: Power on, reset valid, transmit on, transmit polarity
- Fault indicator LEDs: Output and input overcurrent, output and input overvoltage, end of regulation, generator overvoltage, open circuit, phase error
Output Jacks
- Isolated Output Current (10 mV/A)
- Isolated Output Voltage (10 mV/V) (Optional)
Power
- Three-phase, 120 VAC, 400 Hz ± 15 Hz
- Recommended motor generator set: Zonge ZMG
- Power connector: Hubbell, 4-Pole, 5-Wire
Options
- IGBT spare module
- SCR spare module
- ZCM-10 Isolated Output Voltage (10mV/V) (Optional Current monitor isoamp module)
- LB6000 Resistor load bank
- ETS-9 Switch box for rapid switching of dipole pairs
- Optional internal time base