GSR Amplifier
The FE116 GSR Amp is used to measure the Féré effect, a general measurement of autonomic nervous system activ-ity. It can be used to analyze the startle response to visual, auditory or somatosensory stimuli. The ML116 GSR Amp is a fully isolated, skin conductance response amplifier with low constant-voltage AC excitation and automatic zeroing. The low level AC excitation reduces electrode polarization artifacts found in DC systems. The GSR Amp is galvanically isolated for subject safety and approved to the IEC601-1 standard for human connection as a body protected (BF rated) instrument. Supplied with a pair of MLT116F finger electrodes with Velcro™ attachment straps.
Compatibility:
The GSR Amp is compatible with series 35 PowerLab.
Operation:
The 75 Hz oscillator supplies a near square wave, low-impedance, low-voltage (22 mVrms) signal to an electrode on one finger of the subject. If the skin has a measurable conductance, current flows from the electrode on the other finger back into the very low impedance input of the transimpedance amplifier. The current is then converted to a voltage signal. The current will change as the autonomic reflexes change the skin?s conductivity.
• Do not use recording gel with the electrodes. This will tend to give higher basal readings as skin resistance is lowered by gel.
• Avoid measuring skin conductance if the subject is perspiring excessively at rest.
The FE116 GSR Amp is supplied completed with the following:
• I²C Cable (9-pin plug to 9-pin receptacle)
• BNC to BNC Cable
• GSR Amp Owner's Guide
• MLT116F Finger Electrodes
Also available:
• MLT117F MRI Compatible Finger Electrodes (5m)
• ML116-DC-06A
| Specifications | 77-0245 | 77-0126 | 77-0127 |
|---|---|---|---|
| Certifications | CE | *na | *na |
| Control Port | I²C Port Provides control and power. Interface communications rate of ~50 Kbits/s | *na | *na |
| Dimensions H x W x D English | 2.2 x 4.7 x 10.2 in | *na | *na |
| Dimensions H x W x D Metric | 55 x 120 x 260 mm | *na | *na |
| Frequency Response | -3 dB at 1 Hz | See product page for complete specifications | See product page for complete specifications |
| Input Accuracy | ±5 % | *na | *na |
| Input Amplification Ranges | 1 to 40 µS full scale in 6 steps (combined PowerLab and GSR Amp) 0 to 40 µS, 0 to 20 µS, 0 to 10 | *na | *na |