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Chongqing Gold M& E Equipment Co., Ltd.
Address:  9F/10,Jintai Building, Nanping, 400060,Chongqing,China

Contact person:Michelle Li
Tel: 0086-023-62794421
Fax: 0086-023-62940030
Mobile/Whatsapp: 0086 15922636015
E-mail: master@hy-industry.com
Skype: oilpurifier2010
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WDJD-4 Multi-function Digital DC Resistivity/IP Meter

WDJD-4 Multi-function Digital DC Resistivity/IP Meter is Geotechnical, Groundwater, Environmental, Archaeology, Non-Destructive Testing, and Structural Imaging Investigations by 1D Electrical Resistivity or Induced Polarization.

Quantity:
  • WDJD-4
  • GOLD
  • 9015800090

Introduction

WDJD-4 Multi-function Digital DC Resistivity/IP Meter is our new generation model with 32 single-chip and 24 bit A/D technology on the basis of years of experience of design and manufacture, which could carry on Res and IP survey at the same time. It features multiple functions, high accuracy, fast speed, high reliability and excellent expandability. Measured data of WDJD-4 can be processed by other multi-electrode resistivity software, which makes the interpretation more convenient.

Mianly used survey methods:

1. 1D Electrical Resistivity Survey(Electrical Vertical Sounding)


Vertical Electrical Sounding (VES) was the dominant geophysical resistivity method. It has been used for geotechnical investigation, groundwater exploration, and mineral exploration. 

VES is usually performed as Wenner electrode configuration which described in the ASTM G57 standard or using the Schlumberger electrode configuration. (The Schlumberger method is most commonly used for groundwater and mineral exploration)


geophysical prospecting Instrument(2)

2.  1D Induced Polarization Survey 


The induced polarization method is the sister of the DC resistivity method which is extensively and effectively used in base metal mineral exploration for locating low-grade ore deposits,  It has other applications in hydrogeophysical surveys, environmental investigations, and geotechnical engineering projects.

The use of induced polarization in groundwater exploration is growing in prominence. 



geophysical prospecting Instrument(1)

The single WDJD-4 can conduct general electrical resistivity/IP survey with twist pair wire, iron electrodes and power source. If WDJD-4 is used together with WDZJ-4 multiplex electrode switcher multi-electrode cable, electrodes and power source, it can conduct not only general electrical resistivity/IP survey but also multi-electrode 2D Resistivity imaging.


Transmitting unit and receiving unit are of all-in-one design, portable and lightweight.

 

Super high-power, high anti-interference performance and precision: up to 6600w (1100v×6A) power, 48Vp-p voltage range ensures to get a good result in a area with high resistance.

 

Automatically achieving compensation of self-potential, drift and electrode polarization, up to ±10V.

 

Receiving unit support transient over-voltage protection, transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection.

 

 For general resistivity and IP survey function, 9 types of electrode arrays are available. Electrode distance (namely “Program”) can be inputted or called. Geometric factor K can also be generated automatically or calculated manually.


For multi-electrode 2D resistivity imaging, up to 18 electrode arrays are available. It could scanning measure according to fixed section (including AMNB, ABMN, AMBN, AMN, MNB, A-MN-B, Sp M, Sp MN, charge M, charge MN) or continuous rolling scanning measure according to variable section (including A-M, A-MN, AB-M, AB-MN, MN-B, A-MN rectangle).


WDJD

 

Program: the program can memorize 100 groups of electrode distances, avoiding repetitive input. Or you just input a program Id and step to call the corresponding electrode distances.

 

Earth resistance inspection: ground condition can be inspected at any time.

 

 Mass data storage: Up to 1GB capacity (extended) enable store 5,000,000 groups measuring data (including current, voltage, SP, Ro, Ms, metal factor, TH, R, J).

 

All parameter and data are under power-failure protection; and thus data will not be lost even thought the system shuts down accidentally.

 

 USB port enables it to transfer data to computer. 

geophysical prospecting instrument(4)

Receiving
Voltage ± 6 V,±1 % ± 1LSB
Measurement accuracy if Vp&ge;10mV, &plusmn; 5&permil; &plusmn; 1LSB; if Vp < 10mV, &plusmn;1% &plusmn; 1LSB;
if Vp&ge;10mV, &plusmn; 5&permil; &plusmn; 1LSB; if Vp < 10mV, &plusmn;1% &plusmn; 1LSB
Input impedance &ge;50M&Omega;
Measurement precision of apparent polarizability &plusmn; 1%&plusmn; 1LSB
SP compensation range &plusmn; 10V
Current 6 A,&plusmn;1% &plusmn; 1 LSB
Measurement accuracy if IP&ge;10mA, &plusmn; 5&permil;&plusmn; 1LSB; if IP<10mA,&plusmn; 1%&plusmn; 1LSB
Suppression over 90Db for 50Hz industrial frequency (common mode interference or differential mode interference)
Transmitting
Maximum transmitting power &plusmn;6600W
Maximum voltage &plusmn;1100V
Maximum current &plusmn;56A (when voltage &le;900V)
Pulse width 1~60s, duty cycle is 1:1
Others
Working temperature -10&deg;C~+50&deg;C (Environmental), 95 %RH
Storage temperature -20&deg;C~+50&deg;C (Environmental)
Power supply internal 12V 9Ah rechargeable battery , lasts for 30 hours (or 12V external power supply)
Overall current &le;55mA
Weight &le;4.5Kg
Dimension (LxWxH) 270mmx246mmx175mm


Standard configuration List of WDJD-4 Resistivity/IP Meter 

No.

Details

Qty

1

WDJD-4 Mainframe

1 Set

2

USB Communication Line

1 Set

3

Charger

1 Pc

4

12V Power Input Line

1PC

5

Instrument backpack

1PC

6

Windows Software U Disk

1PC

7

Operational Manual

1PC

8

Unpolarized Electrodes

1Pair

9

Iron Electrodes

10PCS


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