X-CAL - A calibration system for electrical measurement devices used with diagnostic x-ray units
Ronald H. McKnight, Robert Hebner · 1980
A high-voltage-divider calibration system (designated as X-CAL System) was designed to calibrate the direct and alternating voltage measurement capabilities of commercial high voltage dividers used to characterize diagnostic x-ray units.The system includes capability for determining the frequency response of these dividers and for the calibration of the filament current and anode current measurement features of specific commercial ly-available devices.The calibration system combines in a single unit a range of capabilities which allows calibration of a device under test to be accomplished with a minimum of set up time.This report describes the rationale for measuring certain parameters of the high voltage dividers.It provides the design details of the X-CAL system and certain sections of this report serve as the operating manual for the system.The report lists the specified accuracies and the ranges of applicable parameters of the various subsystems, describes the five different calibrations which can be performed using the X-CAL system, discusses techniques used in the original calibration of the X-CAL system itself, and contains the basic circuit diagrams for the system..