WGMD-3A Geophysical Instruments for Groundwater Investigations

Main characteristic:

Nicety, high efficiency: in the precondition of good repeatibility, measuring one section concluding 552 points’ requires no more than minutes.

Super storage：in the high density mode 1 (only store resistivity parameter), it can store more than 43680 measured values；in the condition of high density mode 2 (store resistivity and electricity parameter)，it can store more than 21840 measuredd values. The data will not lose when suddenly power off.

Ground resistance examination: in the field，you may examine conveniently and quickly at any moment if each ground electrode is ok.

System Include:

WDJD-3A instrument ( RES/IP)

Electrode switcher (WDZJ-4/WDZJ-120)

Cable ( 30 take-out)

Electrode and plug

Software

External Battery Box

Main Technical Specifications:

(1). WDJD-3A multi-functional digital DC resistivity/IP meter 

Receiving part

Voltage chunnel：±6V

Measure precision：Vp≥10mV: ±0.5% ±1 byte

Vp＜10mV: ±1%  ±1 byte

Current chunnel: 5A

Measurement accuracy: Ip≥10mA: ±0.5% ±1 byte

Ip＜10mA: ±1%  ±1 byte

Apparent polarization rate measure accuracy: ±1% ±1 byte

50Hz line industrial frequency pressing (common model disturb and different model disturb): Suppress excel 80dB

Imput impedance：≥50M

Transmitting part

Maximal power supply voltage：900V（when high density, the maximal allow voltage is 450 V） Maximal power supply current: 5A

Others

Work temperature: 10 ℃～+50℃, 95% RH Instrument source current：≤55mA

Instrument power soruce：C battery (or nickelcadmium battery of the same si ze) eight.

Volume：310×210×210ｍｍ3

Weight：7 kg

(2). WDZJ-4 Multiplex Electrode Switcher

Switch electrode number: 60

Insulated capability: ≥500MΩ Maximum work voltage：500VDC Maximum work current：2.5ADC

Instrument power supply：internal large capacity lithium battery, can work continuously for more

than 25 hours , or 12V external power supply.. Work temperature：10 ℃～+50℃

Certificates:

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