Operation
:
The needle or surface electrodes
are attached on the muscle site to be studied ; and the
cable connected to the EMG amplifier. Depending on user’s requirements,
the sensitivity, time constant, bandwidth are selected. The EMG Panel
Meter gives indication of the average/peak level of the EMG signal.
It can be connected to any oscilloscope for study of EMG patterns.
Using optional nerve/muscle stimulators and oscilloscope,
nerve-conduction velocity can also be calculated.
Specifications
:
Input
: Differential, isolated,
with input impedance greater than 10 M.
Common Mode Rejection
Ratio : Greater than 80db
with 10K source impedance.
Sensitivity/Gain
: Adjustable by 6-way Gain Selector with following gain settings
: 1K, 2K, 5K,10K, 20K and 50K
Fine gain Control:
The gain in each setting can be
varied from 1 : 0 .5, with a potentiometer.
Noise output:Less
than 10 m V.
Frequency Response:
0.1 to 10 KHz.
Bandwidth
Limiter : Hi-cut switch limits upper cut-off to 1Khz;
Filter Facility:
Notch-Filter to cut-off 50/60 Hz mains disturbance.
Time Constant:
Adjustable in the following 3 steps as follows : 1,2,5 and 15 seconds.
Peak- Hold facility:
If this switch is pressed, the output is held at the peak-to-peak value
of the input signal.
Reset Facility
: Provision to reset the integrator/hold
circuit to initial zero value.
Outputs :
(1) EMG socket for displaying the EMG signal wave form onto oscilloscope,
tape-recorder, or audio monitor ;
(2) EMG Panel Meter : This gives the Average
value or Peak to Peak value on a 0 to 5 scale. Meter range can be set to
0-500 m V or, 0-5V.
Power consumption
: Less than 5 watts.
Power Source:
220 or 110 volts/50Hz mains supply ; or alternately, 2 Nos: 9 volt alkaline
batteries (Duracell MN1604 6LR61 or equivalent)
Size/Weight:
22x11x15 cms/3 Kgs. |
