UNITED STATES DEPARTMENT OF COMMERCE John T. Connor, Secretary NATIONAL BUREAU OF STANDARDS ● A. V. Astin, Director For sale by the Superintendent of Documents, Government Printing Office 3.2.2 Shocktube Operation- 14 14 Pneumatic Stepfunction Calibrator Operation------ 16 3.2.3 Liquid Medium Step function Calibrator Operation-- 16 3.3 Analysis of Dynamic-calibration Data- 17 3.3.1 Frequency Analysis of Recorded Transients by 17 3.3.2 Graphic and Visual Analysis of Photographs of 18 Methods for Performance-Testing of P. S. Lederer This publication describes methods in one particular program at NBS for the performance-testing of electro-mechanical pressure transducers (such as telemetering transducers used in aerospace testing.) It covers static and dynamic calibration procedures in detail, delineates environmental and other tests, and describes the test equipment used. Examples of dynamic calibration results are interpreted. KEY WORDS: Electro-mechanical, Pressure, 1. Introduction This publication describes methods used in one particular program at NBS for the performance testing of electro-mechanical pressure transducers (such as telemetering transducers used in aerospace testing). In order to obtain meaningful measurements of physical quantities such as pressure, acceleration, and temperature, by the use of telemetering transducers, one must have thorough and accurate knowledge of the performance characteristics of such transducers. This report describes the test methods currently used in the Basic Instrumentation Section of NBS to determine the characteristics of one class of instruments: electro mechanical pressure transducers. The main objective is to present a group of test procedures which have been developed during the past several years as part of the "Interagency Telemetering Transducer" program at the National Bureau of Standards, currently supported by agencies of the Defense Department and NASA. These procedures permit the effective determination of performance of a pressure transducer. Tests to destruction were not carried out as part of this program. No attempt has been made to describe and review critically all the known methods for testing this class of transducers. The terms defined below deal with those characteristics of an electromechanical pressure transducer which, at the present state of the art, a user should be in a position to evaluate. The manufacturer, on the other hand may be expected to furnish information on these characteristics. The letter index refers to location of definition in the following Section 1.1: * |