JJH-2 Induced Polarization Probe | Geotech Instrument Co., Ltd.

PRODUCT PARAMETERS

The use of variable current technology enhances the excitation current density and compensates for the influence of well fluid to a certain extent.
The use of bidirectional short pulses and high current power supply can automatically compensate for the influence of natural potential and instrument zero drift, realizing continuous measurement and recording in the borehole, greatly improving work efficiency.

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Description

FAQ

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Description

Abstract

Polarizability logging is an important method in geophysical work of metal and non-metallic mineral boreholes. It can measure parameters such as natural potential, resistivity of two pole distances and polarizability. It has good application effects in the fields of metal and non-metallic mineral and hydrological survey.

Applicable Conditions

● Bare hole

● Fill with water or mud

Features

● The use of variable current technology enhances the excitation current density and compensates for the influence of well fluid to a certain extent.

● The use of bidirectional short pulses and high current power supply can automatically compensate for the influence of natural potential and instrument zero drift, realizing continuous measurement and recording in the borehole, greatly improving work efficiency.

Specifications

Polarization measurement range	1~100%, measurement accuracy: 2%
Apparent resistivity measurement range	0~4000ΩM, measurement accuracy: 2% (10~4000ΩM)
Electrode arrangement	AM 16 inches, AM 64 inches
Natural potential measurement range	±1200mV, measurement accuracy: 2%
A, B power supply current	≤500mA
Signal output	Bipolar encoding

FAQ

In gravity exploration (SI), what is the unit of gravity? How to convert gravity units between SI and CGS?

What are gravitational field and gravitational potential?

What is the normal gravity field of the earth? What are the rules for the change of the normal gravity field with latitude and altitude?

① The normal gravity field of the earth: Assuming that the earth is a rotating ellipsoid (reference plane), the surface is glossy, the internal density is uniform, or it is distributed in concentric layers, the density of each layer is uniform, and the deviation of the shape of the ellipsoid from the geoid is very small, then the gravity field generated by the earth is the normal gravity field.
② The normal gravity value is only related to the latitude, the smallest at the equator and the largest at the poles, with a difference of about 50,000 g.u.; the rate of change of the normal gravity value with latitude is the largest at 45° latitude, and zero at the equator and the poles; the normal gravity value decreases with increasing altitude, and its rate of change is -3.086 g.u.. The main feature of the long-term change is the "westward drift" of the geomagnetic elements, both the dipole field and the non-dipole field drift westward, and have a global nature.

What is the relationship between gravitational field strength and gravitational acceleration?

What is gravity exploration?