Geophysical Instrument for SP Method and Geophysical Resistivity Meter

Features:

• Transmitter and Receiver is all in one, it is portable and flexible.
• Super storage capability ---- more than 150000 times. (including voltage, current, resistivity, relative error, SP, array constant, measuring point and so on)..
• Quality monitoring----- Automatic display electrical resistivity and relative error between current measuring result and last measuring result. Memorizing the measuring result and relative error at the same time..
• Array constant table----Memorizing 30 different array constant, avoiding repetitive input, input number can invoke polar distance or reset.
• Grounding electrode check----- Monitor MN electrode potential dynamic variation with grounding electrode resistivity check.
• Electrode array -----Calculate eight kinds of ordinary constant of field electrode array automatically, or input special electrode array constant directly.
• Super-low power consumption -----CMOS large scale integrated circuit, stand-by current low to 30mA, automatic cut-off when the stand-by time overtime.
• Automation-----Automatic SP compensation by single-chip microcomputer (SCM), gain adjustment, filtration and signal enhancement.
• Safeguards-----Over-voltage protection, over-current protection, high-voltage opposition protection, AB open-circuit protection, power-fail protection.
• On-line operation----RS-232 serial interface on-line work with other microcomputer.
• RS-232C port can communicate with other computers.
• Self-diagnostic function ----- Self-diagnostic function to fault location and main damage device.
• All sealed constitution---Water-proof, dust-proof, long life and so on

Technical specifications:

Transmitter

• Maximum supply voltage: 700V
• Maximum supply current: 3.5A (over-current protection)
• Supply waveform: repeating ON+, ON-

Receiver

• Input impedance: ≥30M
• Input voltage range: -6V ~ +6V,±1%±1
• Delay time: 0.1~5s (can be setted by program)
• Automatic SP compensation range: -1 to +1V
• Ground resistance: 0.1 ~ 200KΩ±3%
• 50Hz industrial frequency pressing:≥60dB
• Current measurement: 3.5A, ±1% ±1 LSB

Other

• LCD display: 4 line×20character
• Operating temperature: -10℃~50℃
• Power: eight C size batteries (or same specs nickel-cadmium battery)
• Power consumption:≤70mA(working) ≤30mA(stand-by)
• Weight: 6Kg
• Dimensions (L×W×H): 240mm×170mm×160mm