KV
R
Rd
D1
D2
D3
S1
C
S2
S3
S2
S3
C
KV
R
Rd
D1
D2
D3
S1
垂直测试
水平测试
The requirements for the equipment and device are as follows:
C——calibrated product: electrostatic sensor
D1——DC high voltage power supply: output range is -20KV
～
+20KV, continuously adjustable, or the
minimum stepping is 10V, and measurement uncertainty is less than 1/4 of the allowable error limit of the
calibration table.
D2——DC high voltage meter: measurement range is -40KV
～
+40KV and the measurement uncertainty is less
than 1/4 of the allowable error limit of the calibration table.
D3——standard plate electrode: the plate electrode should be circular or square rounded corner. It’s appropriate
that the radius of curvature on the edge of the electrodes does not generate corona and it’s recommended that
the edges of the electrodes should be wrapped with insulating materials; the plate area should be large enough
and the diameter or side length should be no less than 0.4m. Our calibration plate is square stainless steel plate
with the dimension of 600mm*600mm.
R
——protective resistance: the withstand voltage strength of resistance is 20KV and the current through the
protective resistance and human body is
＜
5mA and the resistance value R conform to the following formula
requirement:
/
0.1%
d
R
R
R
（
）
Where:
R
is protective resistance and the unit is Ohm (Ω);
d
R
is the resistance of insulating support and the unit is Ohm (Ω); resistance value
d
R
＞
10
13
Ω and the withstand voltage strength is
＞
25KV.
The above two kinds of resistance may cause different static voltage values in detection under the same
standard voltage due to the different resistance values.
S1——insulating support
S2——graduated scale, the measurement range is 0mm
～
750mm and the measurement uncertainty is less than
0.5mm.
Vertical test
Horizontal test
