Single Channel EEG Test System | User Manual
14
2.5.4 Input impedance test
This check box allows the user to switch in an impedance of
620kΩ//4.7nF in series with the main function, for testing the
input impedance of the EEG device under test. When the
check box is ticked, the impedance is shorted. The ±150mVdc
offset can be used in conjunction with this test.
2.5.5 Output lead electrode
This section allows the user to select which lead electrode the
output is connected to (i.e. terminal P1 in the IEC 80601-2-26:2019,
Figure 201.104). Unselected electrodes are connected to the
system ground (terminal P2 in Figure 201.104).
More than one lead electrode may be selected.
2.5.6 Output graphic display
The output display provides an image similar to that provided by EEGs. The
sensitivity of the display range may be set at 0.1mm/µV, 0.05mm/µV or
0.02mm/µV to cover the full range of waveforms offered by the system. The
time rate is fixed. The output display uses the same data as used in the DAC
output and serves as a cross check of the selected waveform.