Sarcomere Spacing Module MUSCLE PHYSIOLOGY The SI-SARCAM Sarcomere Spacing Module was designed for the SI-MKB and SI-HTB systems. It consists of a linear diode array detector coupled with a calibrated controller (shown below). Together with the laser diode system, it facilitates the calibrated measurement of sarcomere length in striated muscle samples. The SI-SARCAM can be combined with mechanical intact muscle parameter measurements with the SI-MKB and SI-HTB systems. It can be combined with calcium measurements and myomechanics in intact and skinned muscle fibers when you are using the SI-MKB system. The SI-SARCAM module requires two of the eight module positions in the chassis. How It Works A red laser diode (λ=650nm) is used. A onedimensional (linear) CCD camera with a time resolution of 1ms scans the light intensity of the diffraction pattern beginning 6.8mm from the center beam.The camera scans only half the diffraction pattern, assuming that the pattern is symmetrical with respect to the center beam. When the scan arrives at the part of the CCD chip which is hit by the first order diffraction of the pattern, the output voltage increases to a peak level, and the first order of diffraction is captured. Then, the intensity signal decreases again. The sarcomere length is calculated from the first order diffraction distance. See the full article at www.wpiinc. com/sarcam. A cross hair mark used for aligning the laser is etched on the front of the camera, which is mounted just behind the optical cuvette. SI-SARCAM Sarcomere Length Control Module be recorded. This unit is available in a standalone model and as a module for the Signal Conditioning Amplifier System backplane. ●● Controls two cuvettes simultaneously ●● Uses PID control to maintain a constant temperature with ±0.1ºC tolerance ●● Has both high and low alarm warnings which can be user defined ●● Easy to control with simple interface ●● Also available as a stand-alone device — call for details and price. SI-TCM2B 2-Channel Temperature Control Module SI-TCM2 2-Channel Temperature Control Standalone Temperature Control The SI-H Temperature Control Unit is designed for use with the SI-H line of muscle physiology research platforms. It maintains the temperature of an SI-H cuvette up to 45ºC. It is accurate to 0.1ºC. The circuit is appropriate to RTD (resistive temperature device) applications. It linearly converts a temperature reading to a voltage that is displayed as a temperature on the SI-TCM2 and can SI-SARCAM SPECIFICATIONS INPUT CONFIGURATION LASER LASER WAVELENGTH CAMERA POWER REQUIREMENTS Current to voltage converter Red laser diode 650 nm Linear CCD Camera 12V DC provided by the chassis SI-TCM2 SPECIFICATIONS INPUT CONFIGURATION POWER REQUIREMENTS Current to voltage converter 12V DC at 2.5A 50/60Hz wall adaptor, 2.5mm ID/5.5mm OD with positive center DC barrel (included–WPI #801513) MAXIMUM POWER CONSUMPTION 1.3A AT 115V 50/60HZ, 1.8A AT 230V 50/60HZ OPERATING TEMPERATURE RANGE Room temperature DISPLAY PRECISION CONTROLLER RESOLUTION CUVETTE TEMPERATURE SENSOR 0.1ºC 0.1ºC 1000Ω RTD (1000Ω at 0ºC) See the Sarcomere Spacing Assembly on page 4. World Precision Instruments www.wpiinc.com Germany: Tel: +49 (0)30-6188845 • wpide@wpi-europe.com US: Tel: 941-371-1003 • sales@wpiinc.com 10 UK: Tel: +44 (0)1462 424700 • wpiuk@wpi-europe.com