DocumentCode
2882462
Title
An Instrument for Finding the Maximum RMS Current/Voltage Application: Ringing and Tone Systems
Author
Combs, D.E.
Author_Institution
Bell Telephone Laboratories, Inc., Whippany, New Jersey 07981
fYear
1982
fDate
3-6 Oct. 1982
Firstpage
165
Lastpage
169
Abstract
This paper describes a microcomputer controlled current and voltage measuring instrument which was primarily designed to find the maximum rms current in selectable time intervals of 1, 5, 15 or 60 minutes, or an indefinitely long interval. The instrument consists of a Measurement Controller (MC), which is the main subject of the paper, up to three current probes, associated amplifiers, and a small printer. The MC and current probe amplifiers plug into a portable power module which is about the size of a small suitcase. The MC has a 3 1/2 digit display that is updated every 200 milliseconds. The instrument can also be used as a continuous indicating true rms ammeter or voltmeter. The usable frequency range is dc and 15 Hz to 2500 Hz.
Keywords
Current measurement; Instruments; Microcomputers; Plugs; Power amplifiers; Printers; Probes; Time measurement; Voltage control; Voltage measurement;
fLanguage
English
Publisher
ieee
Conference_Titel
Telecommunications Energy Conference, 1982. INTELEC 1982. International
Conference_Location
Washington, DC, USA
Type
conf
DOI
10.1109/INTLEC.1982.4793724
Filename
4793724
Link To Document