Functional code error monitoring in computerized data-acquisition systems

A method is proposed for detecting errors in minimum-cost data stores.     

Metrological-support zones for data-acquisition systems

Measurement Techniques -     

Optimizing the interval between checks for a modular computerized data-acquisition system

Measurement Techniques -     

Automatic checking of analog-digital converters in data-acquisition systems

Measurement Techniques -     

Error definition for data-acquisition systems in steady and unsteady states

Conclusions The steady-state static and dynamic errors of analog and digital systems under normal and working conditions have to be considered as particular cases of the corresponding transient-state errors, not components of the latter. This general approach to error determination provides statistical characteristics that fully incorporate the features of the data processing, in particular much better than do existing methods, which are to be considered as approximate.Translated from Izmeritel'naya Tekhnika, No. 9, pp. 21–24, September, 1979.     

Metrological support to data-acquisition systems for oil-product accounting

A test method and least- squares fitting have been used in algorithms for calibrating differential pressure gauges during use. The two methods provide good metrological characteristics in quantitative metering systems for oil products working over wide pressure difference ranges.Translated from Izmeritel'naya Tekhnika, No. 9, pp. 16–18, September, 1993.     

Diagnosis of restorable components of special-purpose on-board data-acquisition systems

The diagnosis of restorable components of special-purpose on-board data-acquisition systems containing continuous and discrete devices is analyzed. Translated from Izmeritel'naya Tekhnika, No. 7, pp. 17–19, July, 2000.     

Design of ultrareliable computer for air- and rocket-borne data-acquisition systems

A fail-safe computer with a systolic processor as the majority element is proposed. The processor consists of arrays of monobit processors. High reliability is achieved by triple redundancy. Translated from Izmeritel'naya Tekhnika, No. 7, pp. 12–17, July, 2000.     

Diversity in computerized reactor protection systems

Based on engineering judgement, the most important measures to increase the independency of redundant trains of a computerized safety instrumentation and control system (I&C) in a nuclear power plant are evaluated with respect to practical applications. This paper will contribute to an objective discussion on the necessary and justifiable arrangement of diversity in a computerized safety I&C system. Important conclusions are:

(i) diverse equipment may be used to control dependent failures only if measures necessary for designing, licensing, and operating a computerized safety I&C system homogeneous in equipment are neither technically nor economically feasible;

(ii) the considerable large operating experience in France with a non-diverse equipment digital reactor protection system does not call for equipment diversity. Although there are no generally accepted methods, the licensing authority is still required to take into account dependent failures in a probabilistic safety analysis;

(ii) the frequency of postulated initiating events implies which I&C functionality should be implemented on diverse equipment. Using non-safety I&C equipment in addition to safety I&C equipment is attractive because its necessary unavailability to control an initiating event in teamwork with the safety I&C equipment is estimated to range from 0.01 to 0.1. This can be achieved by operational experience.

General aspects of metrological support to data-acquisition systems and process controls

Translated from Izmeritel'naya Tekhnika, No. 11, pp. 17–19, November, 1990.