Overview
ABSTRACT
This article presents the connection rules for generators and measuring devices, in order to avoid perturbances wich can affect the accuracy of measurements. It focuses on the issues of series-mode voltage, common-mode voltage, of the influence of voltage supply, connection cables, devices with a teminal connected to ground, floating input or output devices and devices with a safety guard circuit. It end on examples on commonly made errors and feedback.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
-
Radomir SOUCEK : CNAM engineer in electronics and Doctor of Science in metrology and physical systems, - Consultant, former quality director and head of accredited metrology laboratories.
INTRODUCTION
This article is largely based on the publication dealing with the subject of measurement disturbances, which appeared in Techniques de l'Ingénieur in 1979
Having said this, it should be noted that supplements concerning the application of the rules to the use of multimeters and generators have also been published. .
But technology has evolved, and nowadays low-frequency metrology laboratories mainly use generators, multimeters or direct-reading instruments. The use of measuring bridges assembled by the metrologist has all but disappeared.
Numerous feedbacks have shown that, in a significant proportion of cases, the necessary precautions to avoid measurement disturbance are not taken. The aim of this article is to raise metrologists' awareness of this problem, and help them reduce the influence of disturbances.
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
KEYWORDS
generator | measuring device | calibrator | guard | common mode
Parasitic phenomena perturbance affecting measurement accuracy - Rules for generators and multimeters
Serial mode voltage
Bibliography
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
Article included in this offer
"Electronic measurements and tests"
(
81 articles
)
Updated and enriched with articles validated by our scientific committees
A set of exclusive tools to complement the resources
