High Power DC Electrical Measuring System, Type DJF20-1

DFF20-1 high power DC electrical measuring system consists of a rectification power supply (10 kw or 20kw), a 20kw generator, one or multiple (3~5) receivers, stimulators, dummy loads, AB electrodes, AB power lines, reels, measure electrodes and other accessories. DFF20-1 high power DC electrical measuring systems are widely used for metal and nonmetal mineral resource survey, high-precision mineral resource survey and the exploration of underground water resources.

Feature
There are three synchronization mechanisms to ensure accuracy, including GPS, pulse delay and high accuracy quartz clock. The transmitter and rectification power supply are separated, so that the system is more portable and convenient for field work.
The system is controlled by microcomputer and equipped with a large LCD screen and a touch panel, providing convenience to operators.
Real-time storage of power supply current and sampling at every minute provide convenience for accurate calculation of apparent resistivity.
There is overvoltage, overcurrent and overheat protection.
The special small transformer is efficient and light-weighted.

Specification 1. DJS-9 DC electrical receiver

Maximum measuring voltage	±2.5V
Voltage resolution	0.01mV
Measurement accuracy	±1% (when＞10mV) ±0.2mV (when 3mV~10mV)
SP compensation range	±1000mV
Synchronization modes	GPS, high accuracy quartz clock, software
Adapt power-on line	1~60s optional
Superposition Times	1~10 optional
Instrument Delay Time	100ms ~1000ms optional
Interference Suppression on 50Hz Power Frequency	Better than 60dB
Instrument Input Impedance	＞5 MΩ
Power	7.2V8.8Ah chargeable lithium battery (continuously powering for 50 hours)
Volume	240×95×240mm
Weight	1.5kg

2. DJR waveform DC electrical receiver

Measuring voltage range	±40V (32bit A/D)
Voltage resolution	5nV
Relative measure error	≤±0.2%
Instrument input impedance	≥50MΩ
Input protection voltage	1000V
Screen	5-inch 24bit true-color LCD
Storage capacity	8G-64G
Waterproof level	IP67
Working temptation	-20-+60℃
Volume	240 mm×95 mm×240mm
Weight	1.5kg

3. DKG rectification power supply

Specification	5A/2000V	10A/2000V
AC voltage	Single-phrase 220V	Three-phrase 380V
Power frequency	50HZ	50HZ
Output voltage	2000VDC	2000VDC
Output current	5A	10A
Weight	50KG	83KG
Volume (mm)	560*320*500	800*400*600
Maximum output power	10KW	20KW

4. DJF20-1 20KW transmitter

Output voltage range	0--2000V
Output current	0.1A-10A
Battery	Built-in 12V lithium battery or out-connected 12V battery
Weight	35kg
Volume	560mm×320mm×500mm