Optical Transducer Amp The SI-BAM21-LCB KG Optical Force Transducer Amplifier is used in conjunction with the SI-H muscle physiology systems. The SI-BAM21-LCB powers the force transducer and converts the output of the transducer to an amplified analog voltage that is proportional to the force applied to the force transducer. The output signal can be multiplied by a factor of 1, 2, 5 or 10 to provide better resolution for a minimal change in applied force. NOTE: An optional factory setting increases the multiplier by a factor of 10, allowing the signal to be multiplied by 10, 20, 50 and 100. The SI-BAM21-LCB amplifier works with KG optical force transducers to: ●● Generate an analog output (-10VDC to +10VDC) that is proportional to the force applied to the tissue sample. ●● Supply a DC voltage that powers the KG force transducer to which it is connected. ●● Digital interface for optional Anti-Oscillation module for use in isotonic studies Also available in a single standalone enclosure, either version provides an incredibly quiet, linear and stable transducer signal to your data recording system. MUSCLE PHYSIOLOGY How the SI-BAM21-LCB Amplifier Works In a typical 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 or SI-MKB Muscle Tester system, the signal is routed internally from the SI-BAM21-LCB module to the SI-AOSUB module. Features ●● Rapid Auto Zeroing function with fine offset adjustment ●● Offset indicator LED’s ●● Multiple gain ranges with adjustable fine tuning for precise calibration The stand alone SI-BAM21-LC Force Transducer Amplifier has all the capabilities of the Signal Conditioning Amplifier module (SI-BAM21-LCB). 2851 SI-KG2 SI-KG2B SI-KG4 SI-KGxx BNC Cable 0-2N Force Transducer 0-0.2N Force Transducer 0-50mN Force Transducer SI-BAM21-LCB Optical Transducer Amplifier SI-BAM21-LC Standalone Optical Force Transducer Amplifier ACCESSORIES SI-BAM21-LCB SPECIFICATIONS Input Configuration Current to voltage converter Gain 1×, 2×, 5×, 10× Optional factory setting: 10×, 20×, 50×, 100× Input Offset Adjustment Output Impedance Power Output Range ± 2.0 VDC 470 Ω 12 VDC provided by chassis ± 10 VDC contact us for specialty tranducers with different ranges See Optical Force Transducers on page 13. UK: Tel: +44 (0)1462 424700 • wpiuk@wpi-europe.com World Precision Instruments www.wpiinc.com Germany: Tel: +49 (0)30-6188845 • wpide@wpi-europe.com US: Tel: 941-371-1003 • sales@wpiinc.com 9