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Nicolet Systems
4-6
April 27, 2015
Impedance
indications The LEDs ( A in Figure 1) on the back of the Headbox indicate the impedance of the
connected electrodes within the range selected when the Impedance check button is
pushed.
Unlit Impedance LEDs identify “in range” electrode impedances.
Orange Impedance LEDs identify “out of range” electrode impedances.
For electrodes with ‘out of range’ impedances:
1. Check the electrode connections to the amplifier.
Electrodes with “out of range” impedances may appear noisier
than those with “in range” impedances.
2. Perform troubleshooting steps, if desired.
3. Repeat the impedance steps.
Figure 1
NOTE:
This amplifier will always have the LEDs displayed Orange if they are not
connected. There is not a way to turn them off if the electrode is not used. This is
different than other Nicolet amplifiers where you could disable them if they were not
needed.
A