How the SI-BAM21-LCB Amplifier Works
In a typical muscle physiology setup, a muscle is held by a force transducer. The force transducer is connected to the SI-BAM21-LCB. As the muscle contracts or releases, the transducer converts the force into an electrical current signal which is proportional to the force applied to the transducer. The SI-BAM21-LCB converts the current signal into a voltage signal that can be displayed on the screen of the recording device.
Before initiating an experiment, the SI-BAM21-LCB must first be zeroed. This sets the baseline for measurements to follow.
The output signal is buffered and multiplied by 1, 2, 5 or 10, depending on the Gain switch setting on the front panel of the amplifier module. The X10 setting is useful when output signals are extremely small. Finally, the force proportional signal is sent through the output amplifier circuit.
The analog output has a range of –10V to +10V that drives the LABTRAX-MDAC data acquisition system, multimeter or oscilloscope.
NOTE: When the Signal Conditioning Amplifier System is configured at the factory for an SI-HTB Muscle Tester system, the signal is routed internally from the SI-BAM21-LCB module to the SI-AOSUB module.