Below are the recommended starting gain values for different BioNex modules when collecting different signal types. It is always important to preview your data to ensure the gain setting is appropriate.

If gain is set too high, the waveform will appear suddenly flat across the top or bottom of the graph as the amplitude nears +/-5 volts.

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Impedance Cardiograph & GSC

Channel Name	Gain	Notes
ECG	500	N/A
Z0	N/A	Gain is fixed with a scaling of 0.1 volts/ohm
dZ/dt	N/A	Gain is fixed with a scaling of 1 volts/ohm/sec
GSC	1st Generation – 10 2nd Generation – 50	To identify the generation of your module, see this support article.

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Impedance Cardiograph & GSC 2

Channel Name	Gain	Notes
ECG	500	N/A
Z0	N/A	Gain is fixed with a scaling of 0.1 volts/ohm
dZ/dt	N/A	Gain is fixed with a scaling of 1 volts/ohm/sec
GSC	N/A	Gain is fixed with a scaling of 10 uS/volt

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3 Channel Bio & GSC

Channel Name	Signal Type	Gain	Notes
Bio 1-3*	ECG	500	N/A
	Respiration	100	Using a respiration belt
	Facial EMG	2000	Zygomaticus, Corrugator, Obicularis, etc
	Large Muscle EMG	500	Bicep, Quadricep, etc.
GSC		1st Generation – 10 2nd Generation – 50	To identify the generation of your module, see this support article.

* All Bio channels are the same, and therefore have the same gain recommendations

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4 Channel Bio & GSC

Channel Name	Signal Type	Gain	Notes
Bio 1-4*	ECG	500	N/A
	Respiration	100	N/A
	Facial EMG	2000	Zygomaticus, Corrugator, Obicularis, etc
	Large Muscle EMG	500	Bicep, Quadricep, etc.

* All Bio channels are the same, and therefore have the same gain recommendations

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4-Channel Transducer

Channel Name	Signal Type	Gain	Notes
Channel 1*	Finger PLE	100
	Ear PLE	500
	Respiration	100
	Skin Temperature	50	Requires modified Transducer module
	Continuous Blood Pressure	100	CNAP
	Accelerometer	50
	Activity Sensor	100
	Hand Dynamometer	500

* All Transducer channels are the same (with the exception of a modified Skin Temp channel), and therefore have the same gain recommendations