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¡¡¡¡WDJD-3 mutil-function
digital DC resistivity induced polarization instrument
¡¡The instrument is a new generation DC electric method instrument
developed by combining Chinese situation and referring to other
advanced electric instrument of foreign countries. It is based
on our design and manufacture experience of many years, and we
consider user¡¯s latest needs. It is of mutil-function, high accuracy,
high speed, high reliability and other excellent function of extension.
The instrument can be extensively applied in metal and nonmetal
mineral resources detection, city geophysical exploration, railway
and bridge exploration, and other application. It is also applied
in hydrologic geology and engineering geology such as searching
for ground water, locate the base of a dam and hidden trouble
of flood protection levee, and can still used for geothermal prospecting.
 Features:
- Transmitter and Receiver all in one, lightweight and convenience.
- CMOS Large-scale integrated circuit, special stand-by mode,
small volume, low power consumption, muti-function
- Cut off power automatically if no operation in 10 minutes.
- Versatility: general electric method and multi-electrode
resistivity electric survey by WDZJ-3 multiplexing electrode
converter, data do not interfere each other.
- Fast and precise: with the precondition good data repetition,
multi-electrode cross-section with 552 measuring points is
no longer than 25 minutes.
- Strong anti-interference and high precision with multilevel
filter and signal amplification.
- Compensating self-potential, drift and electrode polarization
automatically
Receiver has transient over-voltage protection, transmitter
has over-voltage, over-current and AB open circuit protection.
- Measured curve can be plotted on the display directly and
concisely.
- Large display, Chinese character keyboard, Chinese menu,
flexibility of operation.
- Simple calculator can calculate field array factor on the
spot and other routine calculation.
- Setting working period arbitrarily, 9 kinds of common field
working methods can be chosen, array constant can be inputted
and calculated.
- Array constant table----memorizing 100 different array
constant, avoiding repetitive input, input number can invoke
polar distance or reset.
- Ground-resistance inspection----ground condition can be
inspected at any time, operation is flexible.
- Mass data storage----memorizing 3500 survey station data
for electrical resistivity and free mode£¬2500 survey station
data for induced polarization, 43680 electrical resistivity
data for multi-electrode electrical resistivity surveying.
- All parameter and data are power-cut protected, data can
not be lost when closedown or changing battery.
- RS-232C port can communicate with other computers.
- Ascertaining fault location and damaged parts accurately
by diagnostic program.
- All sealed constitution----water-proof and dust-proof design,
long life and other virtue.
Technical specifications:
¡¡Receiving part
- Voltage channel: ¡À 6 V
- Survey precision: if Vp¡Ý10 mV then ¡À 5¡ë ¡À 1 LSB, if Vp <
10 mV, then ¡À1% ¡À 1 LSB
- Input impedance: ¡Ý50M¦¸
- Apparent polarizability precision: ¡À1% ¡À 1 LSB
- SP compensation range: ¡À1 V
- Current channel: 5 A, survey precision: if IP¡Ý 10mA then
¡À 5¡ë ¡À 1 LSB, if IP < 10 mA, then ¡À1% ¡À 1 LSB
- Suppression: ¡Ý80dB for 50Hz industrial frequency
¡¡Transmitter part
- Voltage maximum: 900V
- Current maximum: 5A( when voltage ¡Ü 900V )
- Pulse width: 1¡« 60s, duty ratio 1:1
¡¡Other
- Operating temperature: -10¡æ¡«50¡æ, humidity: 95 %RH
- Memory temperature: -20¡æ¡«50¡æ
- Instrument power: eight D size batteries (or same specs
nickel-cadmium battery)
- Complete appliance current: ¡Ü 55mA
- Weight: ¡Ü 7 Kg
- Dimensions (L¡ÁW¡ÁH): 310mm X 210mm X 210mm
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