A microprocessor-based true-RMS line voltage monitor
Abstract
A true-root-mean-square (RMS) line voltage monitor (LVM) was developed for use in determining compliance with the performance standard for diagnostic X-ray equipment. The instrument measures ac voltage with less than plus or minus 0.1 percent error over a wide range of voltage and frequency. It is compact and lightweight and thus suitable for field use. The theory of operation, system hardware and software, and performance characteristics of the true-RMS LVM. The true-RMS LVM is capable of measuring ac voltage and frequency over a frequency range of 16 to 1600 Hz. For RMS inputs between 60 and 650 V, the maximum voltage error is plus or minus 0.2 V over this frequency range. From 16 to 100 Hz, the RMS value of the input voltage is computed for each cycle. The LVM is also capable of measuring dc voltage.
- Publication:
-
Final Report Bureau of Radiological Health
- Pub Date:
- August 1981
- Bibcode:
- 1981brh..rept.....S
- Keywords:
-
- Electrical Measurement;
- Microprocessors;
- Radiology;
- Root-Mean-Square Errors;
- Voltage Regulators;
- Voltmeters;
- Amplifiers;
- Analog Circuits;
- Frequency Converters;
- Frequency Measurement;
- Frequency Ranges;
- Specifications;
- X Ray Apparatus;
- Instrumentation and Photography