PORTABLE SPECTRAL INDUCED POLARIZATION UNIT (PSIP)
Portable Spectral Induced Polarization Unit (PSIP)
The PSIP is a low-cost high-performance multi-channel spectral induced polarization (SIP) instrument optimized for laboratory measurements manufactured by Ontash & Ermac.
PSIP is fully customizable to the user needs and can come in different configurations, from 4 to 24 measurement channels. The number of receiving channels can increase by combining multiple PSIP units together or adding switching units (PSFS)
PSIP can also perform self potential (SP) and time domain induced polarization (TDIP) measurements with the use of stimulus switch unit.
PSIP can be used for small scale field applications.
Technical Characteristics
| Technical |
| 1mHz – 24kHz frequency range |
| Up to 4 simultaneous test setups |
| Simultaneous sampling of up to 24 voltage sense pairs |
| Actively driven electrode guards/shields for overcoming capacitive coupling and noise |
| User selectable (4) reference internal resistor values |
| External reference resistor |
| Web browser user interface |
| Water-resistant field/travel case |
Multiple units can be connected together for increased channel capacity
Stimulus Outputs [1..4]: (Base Configuration – 2 Outputs)
Type: Differential
Voltage: ±10V (20V p-p)
Current: 10mA (per channel)
20mA (all channels)
Impedance: 100m
Sense Inputs [1..24]: (Base Configuration – 4 Inputs)
Type: Differential
Voltage: ±10V (20V p-p)
Differential Impedance: 4G /1.25pF
Common Mode Impedance: 1G /4pF
Interfaces:
Ethernet
USB Type A
VGA
I2C
Analog Ground
Chassis Ground
External Trigger In
External Trigger Out
External Reference Resistor x 4
Power Input:
12V DC Nominal
Dimensions:
Unit: 17.16” x 10.53” x 7.69”
Case: 24.6” x 19.7” x 14.4”
PSIP – tomography system
A customized version for the PSIP, optimized for small scale field applications, is also available. The system features 6 single ended measurement channels, and a 24 electrode switching unit. This version also features a more powerful transmitter.
