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
The ETVision (ETV) wearable unit resembles an eyeglasses frame that can be worn by itself or over the participant’s prescription eyeglasses. It contains miniature “eye cameras” that view each eye and a “scene camera” that views the scene in front of the participant, and a microphone. An optional visor can be mounted to the front […]
View AllSolving Physical Stress Issues for Surgeons Physical stress in the operating room is common for surgeons, considering how much time they spend in an upright standing position during surgical procedures. With procedures that require standing for several hours and average reported working times of 60-80 hours a week, surgeons seem to be at risk for musculoskeletal […]
BIOPAC combines eye tracking with mobile data logging and physiology data collection to run experiments in the lab or in the real world BIOPAC Systems, Inc. is pleased to announce new eye tracking integration for researchers who conduct experiments from mobile participants in diverse locations. ETVision (EYE-ETV) eye tracking glasses now integrate with BIOPAC wireless systems and software, […]
Read All