Ultra High Density Electrical Measuring Instrument

With a full wave DC electrical method instrument as main controller, the ultra-high density electrical measuring instrument can be equipped with distributed high density cables and electrodes to conduct measurement of distributed 2D, 3D high density resistivity and induced polarization. The instrument can also be equipped with MIS-60A array centralized multiple electrode convertor, centralized high density cables and electrodes to conduct centralized 2D, 3D high density resistivity and induced polarization.

As part of DC electrical method, high density electrical method can observe apparent resistivity and polarizability and then form 2D/3D sections of apparent resistivity and polarizability. The high density electrical measuring instrument can collect high-density data and perform efficient and accurate measurement. It can directly and accurately demonstrate the abnormal electrical property distribution of underground objects.

Specification 1. Full wave DC electrical method instrument

Receiver
Measuring voltage range	±40V (32bit A/D)
Measuring voltage resolution	5nV
Voltage measure accuracy	When U＞3mV, accuracy≤0.1%; when U≤3mV, accuracy=±1uV
Apparent polarizability accuracy	Relative error≤±0.2%
Measuring current range	0 -6000 mA (32bit A/D)
Measuring current resolution	10nA
Current measure accuracy	When Ip≥10mA，±0.1%
Input impedance	≥50MΩ
Input protection voltage	1000V
Interference Suppression on 50Hz Power Frequency	＞120dB
SP compensation range	±40V(real-time automatic digital compensation at the whole range)
Transmitter
Maximum power supply voltage	1400V
Maximum power supply current	6A
Maximum power	7500W
Power supply time	1-64s
Power suspension time	1-64s
Protection	Overvoltage & overcurrent
Others
Processor	ARM Cortex-A8
Operation system	Embedded Linux real-time system
Screen	6.4-inch 24bit true-color LCD
LCD brightness	1200cd/m2, visible in daylight
Storage capacity	16G-128G optional
Data Transmission	USB 2.0
Battery capacity	16.8V 12.5Ah, continuously working for 16h
Power interface	External battery or adapter
Waterproof level	IP66
working temperature	-10-+50℃
Volume	300 x 225 x 132 mm
Weight	5.6Kg

2. Distributed high density resistivity cable

Number of electrode boxes	10 electrodes/cable(5-256 electrodes/cable optional)
Distance between electrode boxes	5m and 10m (1-20m optional)
Power supply	1000V/4A
Power supply impedance	50Ω/km
Diameter	6mm
Weight	4kg (10 electrodes/cable,10m/electrode)
Tensile strength	2000kN
Insulation	≥1000MΩ/1000V (between AB power supply line and low voltage lines)
Waterproof level	IP67 (waterproof, dustproof, rainproof)
Electrode box volume	Φ17mm*62mm(electrode)， Φ 24mm*158mm (maximum volume)
Electrode box compression strength	50Kg/cm²
Switch lifespan	100,000 times
Electrode box power consumption	18mW
Coding	Automatically coding
Cascade connection	Random cables
Receive and transmit electrode	Automatically separation/closure (resistivity and polarizability can be chosen automatically)
Working temperature	-20℃～+60℃

3. MIS-60A multiple electrode convertor

Convertor	60 electrodes/convertor
Power supply	800V/4A
Coding	Automatically coding
Cascade connection	Random cascade connection through multiple electrode convertor
Working temperature	-20℃～+60℃
Volume	27×24.6×12.4cm
Weight	2.6kg
Centralized high density cable
Number of electrodes	30 electrodes/ cable
Distance between electrodes	5m/10m (customization available)
Insulation	≥500MΩ/1000V (between AB power supply line and low voltage lines)
Waterproof level	IP67 (waterproof, dustproof, rainproof)
Material	Polyurethane sheath
Outer diameter	7mm

4. MIS-10A multiple electrode convertor

Convertor	10 electrodes/ convertor
power supply	800V/4A
Coding	Automatically coding
Cascade connection	Random cascade connection through multiple electrode convertor
Working temperature	-20℃～+60℃
Volume	Φ46mm*218mm
Weight	0.4kg
Cascaded high density cable
Number of electrodes	10 electrodes/ cable
Distance between electrodes	5m/10m (customization available)
Insulation	≥500MΩ/1000V (between AB power supply line and low voltage lines)
Waterproof level	IP67 (waterproof, dustproof, rainproof)
Material	Polyurethane sheath
Outer diameter	7mm