Calibration is performed prior to recording. It is assumed that the amplifier has no offset; see baseline offset if necessary.
The gain of an amplifier indicates the factor of amplification of the input signal. If a signal’s amplitude is 1 millivolt and the gain is 10, the signal will be amplified to 10 millivolts.
1 Volt = 1,000 millivolts = 1,000,000 microvolts = 1,000,000,000 nanovolts
These calibration instructions apply to the following amplifiers: ECG100C, EEG100C, EGG100C, EMG100C, EOG100C, ERS100C, DA100C, MCE100C.
Note the gain setting on the amplifier (usually the top switch on the face of the amplifier). Let the gain be X. Enter the following values in the Scaling dialog:
To calibrate in Volts:
CAL1 Input Volts: 0 Scale Value: 0
CAL2 Input Volts: X Scale Value: 1
Units: V
To calibrate in Millivolts:
CAL1 Input Volts: 0 Scale Value: 0
CAL2 Input Volts: X Scale Value: 1000
Units: mV
To calibrate in Microvolts:
CAL1 Input Volts: 0 Scale Value: 0
CAL2 Input Volts: X Scale Value: 1000000
Units: µV
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