Key Features;
DCX-1A Centralized Resistivity Tomography Data Acquisition System
·Using a Industrial Control Computer as a master controller and a Large size LCD
display with touch screen; High efficiency for data processing and high capacity
for data storage; Friendly user interface; Convenient to manipulate
·Many parameters and figures, such as current, voltage, resistivity, polarizability,
operating state, measured horizon in point, operating positions of electrode A,
B, M and N, normal curve and resistivity profile, can be displayed on the color
LCD screen directly and concisely in real time.
·Compound control technology is applied to the centralized multi-channel switch
（multiplexer）, which condenses the scale of hardware and makes more electrodes
can be switched. The system can be custom made to suit clients’ requirements,
offering 240 channels based on 120-channel module. It is convenient for
roll-along measurements on long profiles.
·Two-way coverage makes the arrangement of cable for this system as convenient as
for the distributed system, which can therefore simplify the process of
arrangement, reduce labor intensity and improve work efficiency. Cable joints are
water-proof, so that underwater operation is possible.
·This system has multiple channels which can be extended easily to expand
investigation range and depth, and to improve resolution of investigation.
DCX-1B Distributed Resistivity Tomography Data Acquisition System
·DCX—1B is a distributed system, the switches of which are connected in series
with cables. Control box of switch with build-in microprocessor chip is able to
control switch activation quickly and accurately. One series of cable can be
connected in series with another arbitrarily and their addresses can be arranged
automatically.
·The mainframe of DCX-1B is the same as that of DCX—1A, using
Industrial Control Computer as master controller and having large LCD display
with touch screen. Many parameters and figures, such as current, voltage,
resistivity, polarizability, operating state, measured horizon in point,
operating positions of electrode A, B, M and N, normal curve and resistivity
profile, can be displayed on the color LCD screen directly and concisely in real
time.
·The system can be custom made to suit clients’ requirements, offering 240 channels
based on 120-channel module.
·Each series of cable consists of six electrode boxes. Electrode cables can be
connected in series to increase total number of electrodes for flexible field use.
Electrode cables（Φ7 mm）and electrode boxes（Φ22Х170 mm）are water-proof, so
that underwater operation is possible.
Specifications
·Voltage Measurement: Range: ±4v
	Accuracy: better than ±0.5%
	Resolution: 1μV
·Current Measurement: Range: ±4A
	Accuracy: better than ±0.5%
	Resolution: 1μA
·Output Voltage: 700V (Max)
·Noise Reduction: Better than 80dB for 50Hz power frequency
·Input Impedance: More than 20MΩ
·SP Compensation: Automatic compensation following the tracks of operating condition
·Operating Temperature: -10℃～50℃
·Operating Humidity: 95 %RH (Max)
·Measurement Modes: Wenner array, dipole-dipole array, differential resistivity
sounding array, Wenner–Schlumberger array, pole-dipole array, pole-pole sounding
array, pole-pole profiling array and any other electrode array can be provided
·Measurement Parameters: Output current, primary potential, secondary potential
·Resistivity and polarizabibity data can be collected simultaneously
·Counting Parameters: Resistivity, polarizabibity, array factor and so on