|
|
|
|
|
|
|
|
|
Return to Knowledge Base
| |
Common mistakes/general troubleshooting
-
Make sure the unit is turned on and connected to the computer.
-
Make sure you don't have any amplifiers on the same channel (even if some of the amplifiers are not used).
-
Check the switch on top of each amplifier (for some amplifiers the switch is in the front because they use multiple channels).
-
Use correct ground.
-
To record GSR with other biopotential signals (ECG, EEG, EOG, EGG, EMG, ERS), BIOPAC recommends using CBL205 connected to one ground on any of the biopotential amplifiers. The subject will be grounded through the Vin- of the GSR electrodes, but In some cases it is necessary to have more than one ground; in such cases, use an AC-coupled lead adapter (CBL205) to prevent ground loops.
-
For example, if, while recording a biopotential and GSR you have to remove the GSR electrode during a stage of the experiment, you will still want to have a ground for the biopotential. Connect the Vin- lead of the GSR as ground, and connect an AC-coupled ground to the biopotential amplifier. The result is that you will always have a ground and no ground loops.
-
NOTE: If using any two of the following at the same time: GSR100C, EBI100C or the NICO100C, ground loops will be a problem and you will not be able to make absolute measurements (for example you will not be able to measure SCL). This can be overcome by recording with two MP150 systems, with one of the two units connected to each system or two BioNomadix amplifiers.
-
Calibrate and scale the signals (Setup channels).
-
Adjust the display scales so the data is visible (Autoscale waveforms).
-
Set the sample rate(s) and recording length (Setup Acquisition).
Associated Applications: Amplifiers & Interfaces, MER: Micro-electrode Recording, EGG: Electrogastrogram, EEG: Electroencephalography, ERS: Evoked Response, Magnetic Resonance Imaging - MRI Compatible, ICG: Impedance Cardiography/Cardiac Output, Sleep Studies, ECG: Cardiology, Cardiovascular Hemodynamics, Noninvasive Blood Pressure Monitoring, In-vitro Pharmacology, Laser Doppler Flow, EOG: Eye Movement, Plethysmography, Pulmonary Function, Exercise Physiology, EMG: Electromyography, Biomechanics, Remote Monitoring
|
|
|
| |
|
|
