VISHAY 1550A STRAIN INDICATOR CALIBRATOR

Description

The Vishay 1550A Strain Indicator Calibrator is a tool used to ensure the accuracy of instruments that measure strain, which is the deformation of an object under stress. It works by simulating the change in resistance that occurs in strain gauges, which are sensors attached to objects to measure strain. The calibrator uses a Wheatstone bridge circuit, which is a precise electrical circuit, to generate known and repeatable changes in resistance. This allows technicians to compare the readings of their strain indicator to a known standard and verify its accuracy. The 1550A is particularly valuable because it can simulate different bridge configurations and both positive and negative strain, making it a versatile tool for calibrating a variety of strain measurement equipment.

Specification:

• True Wheatstone bridge circuitry: The 1550A utilizes a Wheatstone bridge circuit, which is a highly accurate electrical circuit configuration ideal for measuring resistance changes. This design offers a significant advantage over “star network” calibrators as it enables simulating real-world behavior of strain gages, including positive and negative strain, crucial for accurate calibration.
• Three decades of push buttons: The calibrator features three sets of decade buttons that allow for precise and incremental adjustments to the simulated strain. This enables technicians to generate a wide range of strain values for comprehensive calibration.
• Strain range direct reading: ±99,900 microstrain (με): The 1550A can directly display strain values within a range of positive and negative 99,900 microstrain. Microstrain is a unit commonly used to measure minute deformations or strains.
• Transducer range: ±49.95 mV/V: The calibrator can also simulate the output voltage of a transducer, a device that converts a physical quantity into an electrical signal. The supported range extends to ±49.95 mV/V, providing versatility for calibrating various transducers.
• Reversing switch for plus and minus calibration: The inclusion of a reversing switch allows the calibrator to simulate both positive and negative strain, essential for ensuring the accuracy of strain indicators across their entire operating range.
• High precision resistors: The 1550A employs high-precision resistors throughout its design. These resistors contribute to the exceptional accuracy and stability of the calibrator, making it a reliable tool for critical strain measurements.
• Accuracy: 0.025% traceable to NIST: The calibrator boasts an impressive accuracy of 0.025%, traceable to the National Institute of Standards and Technology (NIST). This signifies that the calibrator’s measurements are highly reliable and meet the stringent standards set by NIST.