Lippmann - Model hp - 4 Point Light Earth Resistivity Meter
From Lippmann - Resistivity Meters
The earth resistivity meter 4point light hp is a geoelectrical instrument to determine induced polarization (IP) with adequate power to drive Schlumberger soundings up to L/2 = 1000 m.
Features
- Fast mapping function for archeological measurements (like GeoScan RM4/RM15)
- Memory for more than 16.000 measured values
- Full remote control
- Galvanically isolated interface
- Induced polarization
- Quick charge of internal batteries (3 h)
- Various automatic functions for mapping and sounding
- Determination of frequency dependence of resistivity
- Spectral IP
- Phase resolution up to 0.05 mRad
- Automatic trigger for mapping
- Complete calibration possible at an internal reference resistor
- Interface for active electrodes
- Determination of the statistical measurement errors
- Direct calculation or rho-s for Wenner, Schlumberger, Schlumberger/2 Pole-Pole, Dipole-Dipole
Key Data
- Size : 25 x 12 x 5 cm
- Weight : 750 g including batteries!!
- (for comparison: Terrameter SAS-1000: 5 kg, AGI MiniSting: 6.6 kg)
- Frequency : 1.08 - 10 Hz
- Output current : 380 V p-p
- Output voltage : 100 nA ... 50 mA
- Resolution : 50 nV
- Phase resolution up to 0.05 mRad
- 24Bit AD-Converter
- Accuracy : 0.2 %
- Display : 4 x 20 digit LCD
- In-Phase/Out-of-Phase-Display
- Velocity : 1.5-2 sec/measured value
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