Open AccessA Thick Film Sensing Element for True RMS Meter
Author(s) -
Marko Hrovat,
Miran Zgonik,
Darko Belavič
Publication year - 1990
Publication title -
active and passive electronic components
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.144
H-Index - 22
eISSN - 1026-7034
pISSN - 0882-7516
DOI - 10.1155/1990/74067
Subject(s) - resistor , thermocouple , voltage , metre , materials science , substrate (aquarium) , heating element , temperature gradient , electrical resistivity and conductivity , analytical chemistry (journal) , electrical engineering , acoustics , composite material , chemistry , physics , engineering , meteorology , geology , oceanography , chromatography , astronomy
A sensing element for true RMS meter was realized in thick film technology. The temperature gradient alonga substrate was measured by thick film thermocouples, based on a combination of Pt/Ag-Pd/Ag, Pt/Au-Au andNi-Cr. A voltage response of the element was measured as a function of the current through the heating resistorat different ambient temperatures. The transfer function K(T) of the RMS meter was found to be relativelyindependent of ambient temperature, which means that the voltage response is usably linear