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WDA-1 is our latest all-purpose model equipped with the latest technologies, such as pocket PC computer, blue-tooth, 24 A/D, high-power control and etc, smaller and lighter.

Function:

General resistivity/IP sounding
Multi-electrode 2D/3D resistivity imaging
Multi-electrode 2D IP imaging
Rock sample test
Work as receiver in large power IP system

Application:

Underground water inspection
energy resource prospecting
city geophysical exploration
railway and bridge inspecting  
metal and nonmetal mineral resources survey
engineering geology
geothermal field survey.

Key Feature:

Maximum power supply reaches 7200W (1200V6A), input voltage range is 64Vp-p,   measurement precision of small signal is high (voltage may be 0.1mV and current may be 0.1mA with 1% accuracy)；SP compensation range is up to ±10V.

Receiving circuit has transient over-voltage protection; transmitting circuit has over-voltage, over-current, AB open-circuit as well as inversed connection protection;

It could measure voltage, current, apparent resistivity, SP, metallic factor, half-decay time, attenuation degree, IP ratio, departure.

PDA control mainframe by Bluetooth technology, which also the function of scheduling, wireless internet, office software as Word, Excel, PowerPoint, MediaPlayer.

There are B(∞) infinite current electrode on the panel for 2-pole or 3-pole method. The instrument will auto measure ρsA, ρsB and ρs.

Technical specifications:

Receiving part:

voltage channel: ±32V（24 bitA/D）
accuracy: as Vp≥5mV, ±0.2% ±1 character
as 0.1mV≤Vp＜5mV, ±1% ±1 character 
Input impedance: ＞50ＭΩ 
Apparent polarization accuracy: ±1％±1character 
SP compensation range: ±10V 
Current channel: 6A（24bitA/D）
measurement accuracy: as Ip≥5mA, ±0.2% ±1character
as 0.1mA≤Ip＜5mA, ±1% ±1character 
As for 50Hz industrial interface（common and different mode）depression is better than 80dB

Transmitter part:

maximium power: 7200W 
maximium supply voltage: ±1200V 
maximium supply current: ±6A 
supply current width :1～60s, duty rate 1:1 

Other:

working temperature: -10℃～+50℃，95％RH 
storge temperature: -20℃～+60℃ 
power supply: builtin 7.4V4Ah（or outside 12V）, lasting for 20h 
main unit port: A, B, M, N, DC high voltage, outside battery, 2 cable port, RS-232, blue tooth 
weight: ≤4kg 
size : 270mm×246mm×123mm 

Pocket PC:

Windos Mobile 5.0 system, 624MHz, 640×480true color, 128MB Flash ROM / 64MB SDRAM，512MB CF card, blue tooth, infrared, serial port, 2 rechargeable batteries, with Word, Excl.