ERP-1 Digital Electrical Exploration System

Portable digital electrical exploration system ERP-1 is designed for geophysical survey performed by the following methods

  • Electrical exploration by DC and AC resistivity method - vertical electric sounding (VES), electric profiling, signal generator, M3, as well as measuring of the full vector of an electric field: magnetomotive force, vector survey
  • Natural electric field (self-potential, measuring of stray current field) method
  • Induced polarization (IP) with INFAZ-VP version


  • geological mapping
  • cryopedology
  • search and exploration of mineral deposits
  • geoecology
  • archeology
  • geological engineering
  • applied geophysics
  • hydrogeology


  • The system ERP-1 provides a complex of electrical exploration methods that extends the range of solvable problems and improves the quality and accuracy of obtained results
  • The system has high noise immunity (good quality of measuring unit narrow-band analoque filter is 18), that is required for urban development, sites near electricity transmission lines, railways, etc.
  • Survey result, including the number of profile, survey stake, span, measurement date and time, are stored in memory
  • The system ERP-1 is provided with software for data transfer from measuring unit to PC and storage of measurement results in formats compatible with software package IPI2WIN (VES and VES-IP data processing and interpretation, developed by Moscow State University)
  • 'Digital' area of signal processing contains and additional method of hardware noise reduction
  • Transmitter ERP-1 is supplied with two outputs, a switch tumbler for operation with different supply lines (i.e., for double-differential profiling)
  • Receiver ERP-1 is supplied with two inputs, a switch tumbler for operation with different receiving lines (i.e., vertical electronic sounding with 'collars')
  • The system is developed using technical decisions aimed at cost minimization
  • ERP-1 is designed and developed as equipment with the state-of-art element base, available for a wide range of home consumers


Temperature Range -20 to +50°C


Operation Frequencies DC, 1.22, 2.44, 4.88 Hz
Input Voltage Range:
DC 100 mkV ± 5 V
1.22, 2.44, 4.88 Hz 10 mkV ± 5 V
Input Active Resistance
DC at least 30 mOhms
1.22 Hz at least 19 mOhms
2.44 Hz at least 14 mOhms
4.88 Hz at least 10 mOhms
Interference Suppression
DC at least 60 dB
1.22, 2.44, 4.88 Hz at least 80 dB
Memory Capacity 7000 readings
Interface RS-232C
Weight 2.8 kg
Overall Dimensions 270 x 240 x 100 mm


Operation Frequencies DC, 1.22, 2.44, 4.88 Hz
Output Regulated Current 1, 2, 5, 10, 20, 100 mA
External Power Supply 10 - 15 V
Built-in Accumulator Unit 12 V, 4 AH
Maximum Output Power 30 BA (max.)
Output Current Form Meander
Weight 4.3 kg
Overall Dimensions 270 x 240 x 100 mm