WDJD-3 resistivity induced instrument Art.No.017
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: ± 6 V
- Survey precision: if Vp≥10 mV then ±
5‰ ± 1 LSB, if Vp < 10
mV, then ±1% ± 1 LSB
- Input impedance: ≥50MΩ
- Apparent polarizability precision: ±1% ± 1
LSB
- SP compensation range: ±1 V
- Current channel: 5 A, survey precision: if IP≥
10mA then ± 5‰ ± 1 LSB,
if IP < 10 mA, then ±1% ±
1 LSB
- Suppression: ≥80dB for 50Hz industrial frequency
Transmitter part
- Voltage maximum: 900V
- Current maximum: 5A( when voltage ≤ 900V )
- Pulse width: 1～ 60s, duty ratio 1:1
Other
- Operating temperature: -10℃～50℃, humidity: 95 %RH
- Memory temperature: -20℃～50℃
- Instrument power: eight D size batteries (or
same specs nickel-cadmium battery)
- Complete appliance current: ≤ 55mA
- Weight: ≤ 7 Kg
- Dimensions (L×W×H): 310mm X 210mm X 210mm
