RE: Electrostatic Meters - AC not possible

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Richard Wayne Wall by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>

List,

There are two types of inputs for the Sensitive Research electrostatic
meters dependant on their age.  Essentially newer models have a diode
system and will measure AC as well as positive DC.  Also note the nonlinear
voltage scale on the front of the meter allows for the nonlinear force
measurement between the two capacitor plates.

RWW

 >
 > Original poster: "Mccauley, Daniel H by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
 >
 >
 >
 > To prove that AC measurements using a electrostatic meter is NOT
possible, I
 > went into our lab today and tried measuring 4000VAC (60Hz) using both an
EIS
 > electrostatic meter and a Sensitive Research type electrostatic meter.
 >
 > For each test, the negative terminal of the electrostatic meter was
grounded
 > and connected to the return for the 4000VAC
 > source.  A true RMS multimeter with a high voltage probe was used to
verify
 > any readings.
 >
 > In each instance, the multimeter read the nominal 4000VAC rms, but the
each
 > electrostatic meter read ZERO volts.
 >
 > To verify the electrostatic meters were working i switched the source to
 > output 4000VDC and voila, the electrostatic meters both read 4000V on the
 > nuggin' !
 >
 > Dan
 >



--- Richard Wayne Wall
--- rwall-at-ix-dot-netcom-dot-com