Original Date: 01/23/1995
Revision Date: 01/18/2007
Information : High Voltage Pulse Generator and Calibration Equipment
Sandia National Laboratories’ (SNL's) PSL redesigned and rebuilt the High-Voltage Pulse Generator (HVPG) for state-of-the-art operation using a computer-controlled system with user-friendly software in April 1989. This HVPG, orginally installed in 1966, is primarily used for calibrating precision high-voltage dividers.
The HVPG calibrates precision high-voltage pulse dividers by comparing the magnitude of their output pulses with those of dividers whose calibration is traceable to NIST. With calibration processes to calibrate both resistive and capacitive voltage dividers, and the capability of providing pulse voltages to 350 kV with pulse time intervals from five microseconds to 20 microseconds, typical calibration uncertainties are 0.55%. High voltage pulses are produced by charging a pulse forming network which, in return, discharges through the primary of a voltage step-up transformer using a thyraton switch.
The digitized calibration system includes sample mounting, safety checks, pulse measurement recording, data analysis, uncertainty calculations, and certificate generation. The actual time to run 13 voltage calibrations has been reduced from two hours to 40 minutes. During this period, the operator is free to perform other tasks, within hearing distance, through the use of a computer controlled voice synthesizer audio interface.
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