High
Voltage Divider
Model PARK Voltage Divider is constructed
to a design
by J.H. Park (ref: "Journal of Research" of National
Bureau
of Standards, Engineering and Instrumsentation Vol. 66C,
No. 1 Jan.-Mar. 1962.)
It is similar to the NBS standard employed
in their calibration
of high voltage instruments. Each 100 kv divider consists of
100 individually shielded one-megohm resistors, matched to
each other to achieve an approximate temperature coefficient
of less than 1 ppm/ C, and connected in series to form a vertical
helix between a ground plate and a high voltage electrode.
Uniquely shielded, testing indicates that corona, heating and
leakage errors are less than 10 ppm at less than 10 ppm at
50 kv and 50 ppm at 100 kv.
The divider's special "hat"
is designed to give uniform gradients
from the high voltage electrode to ground and allows stacking
of
additional 100 kv units for higher voltage measurements.
Each unit is only 22 1/4" high!
DC Ratio Accuracy: .05%, 100 kv to 1 v: .5%, 100 kv to 1 kv.
AC Ratio Accuracy: +/- .5%, 50 kv (max.) to 500 v. (60
cps only) Recommended readout instrument at 1 v output tap is
a precision DC potentiometer, at 1 kv tap (.5 kv on AC) recommended
instrument is a .5% accurate electrostatic voltmeter. |
