Title :
An Inexpensive High-Precision Constant-Current System with Metering Electronics
Author :
Vance, Dale L. ; Watson, Donald E.
Author_Institution :
Geomagnetism Laboratory, NOAA Research Laboratories, Boulder, Colo. 80302
Abstract :
A precision constant-current supply designed to deliver up to 600 mA at 18 V dc is described. Short-term stability (<8 h) is within ±0.002 percent of range. Long-term stability (72 h) is ±0.01 percent of range. The system is discussed in relation to its application for the control of magnetic environments using a three-axis Helmholtz coil configuration.
Keywords :
Circuits; Coils; Differential amplifiers; Electrical resistance measurement; Monitoring; Power supplies; Regulators; Resistors; Temperature; Voltage;
Journal_Title :
Geoscience Electronics, IEEE Transactions on
DOI :
10.1109/TGE.1971.271463
