Evaluation and Modification of Existing Prototype Dynamic Calibration System for Pressure-Measuring Transducers. Volume 2. Operating Procedures
Final technical rept.
HOUSTON ENGINEERING RESEARCH CORP TX
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The equipment used in the Edwards AFB Dynamic Calibration Facility is described. The report explains the dynamic calibration procedure and gives detailed equipment operating instructions. A shock tube is used to excite the transducer under test. A flow diagram and detailed explanation of shock tube utilization is presented. The data recording system is diagrammed, in correct operating arrangement. In this group of equipment there are two blast velocity gages which are used to measure the velocity of the shock wave. These gages are placed in ports on top of the shock tube in the test section. The leads from the blast velocity gages are connected to a Berkeley time interval meter. The electrical pulse from either one or the other of the blast velocity gages is also used to trigger the oscilloscope sweep. A Polaroid camera is used to photograph the test transducers output on the scope screen. The Flying Spot Analog-to-Digital Converter reads the transducer response as re corded on a photographic transparency and converts the film record to digital form. The digital information is recorded on IBM cards andor printed paper tape. Output data rate is 40 cards per minute when punching cards and a maximum of 300 points per minute otherwise.
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