Electrograms Module
Home Products Biomedical Instrumentation Electrograms Module
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The VPL-BIO-EMG module is a versatile instrument which is specially designed to perform laboratory experiments and demonstration on EMG. The module can record voltage levels present in specific muscles of the body. It can be used for determining muscle tension and the physical state of the patient.
The system uses various basic instrumentation and monitoring circuits which can be very easily understood by the students. The user can analyze the signals at different sections of circuitry using oscilloscope or PC recorder.
Features
has differential Amplifier:
Common Mode Rejection Ratio (CMRR) : 80 dB
Gain : 120 dB
Sensitivity to 5 mV
Frequency Response : DC to approximately 1 KHz
For protection against line power, safety devices has been incorporated which limits the input voltage.
Control Switches for varying roll off frequencies and amplifier gain
Optocoupler isolates the front end amplifier and reference ground from earth ground circuitry
Selectable notch filter which allows 50Hz/60Hz filtering.
Isolated Power Supplies to isolate the front end amplifier from the common earth ground supply (provides an additional margin of safety)
Polarity Correction Circuitry enables the R wave to be either positive or negative; the output is always a positive signal.
Pulse Stretching Circuit uses the R wave as the signal and converts it into a rectangular pulse
Tone Generator produces the tone whose on period is controlled by the Pulse Stretcher Circuit
Converts the pulse stretched signal into a DC level for the 1 mA meter
Calibration 1mV facility
Various instrumentation circuits can be individually tested which are fully explained in laboratory manual like Differential Amplifier, Opto Electronic components, Notch filters etc.
Module Capability
Demonstration of contraction/relaxation on biceps, triceps
muscles.
Effect of squeezing any object in the hand
Effect of bending the hand backwards
Can increase gain from 5,000 to 50,000 (75-95db)
Covers frequency range of the muscle spikes from DC to 2KHz
Many more capabilities
Equipments Supplied
EMG electrodes and straps
Laboratory manual
Biomedical disposal Accessories Package
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