Potentiometric Error Detector
Product Code : EDS-ETE-15573
Eduscope India is a leading Potentiometric Error Detector
Introduction:
• Error detectors perform the crucial task of comparing the reference and output signals.
• In a purely electrical system where the reference and output are voltages, the error detector is a simple comparator.
• In some other systems with non-electrical outputs, the output signal is converted into electrical form through a measurement or transducer block, and then error detection is performed on the electrical signals.
• A position control system, with both input and output variables as mechanical positions (linear or angular), may however consist of two potentiometers - reference and output, which function as an error detector.
• Other devices which could be used in similar applications include synchro sets (for a.c. systems), sine-cosine potentiometers, hall effect-potentiometers etc, which unfortunately are not readily available. The present set-up is designed to study the important characteristics of a 2-potentiometer angular position error detector.
• These include (i) linearity, (ii) sensitivity and (iii) maximum angle of rotation.
• Good quality wire wound servo potentiometers with full 360° rotation have been used for this purpose.
• Accurately marked dials with least count of 1° are fixed on the shafts for position indication.
• The error voltage is read on a built-in 3½ digit DVM. An I.C. regulated internal reference voltage is available for d.c. Studies.
• When used with an a.c. reference, the unit also demonstrates the phase reversal of the error signal which is important in applications involving a 2-phase servomotor as actuator.
Features and Specifications:
• High quality servo-potentiometers of 360° shaft rotation
• Built-in signal and power sources
• 3½ digit DVM for measurements
• 220V±10%, 50Hz mains operation
• Requires an external CRO for a.c. Studies
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