Presco
AG
Manual_PVM100-Englisch.DOC/ PO/19.07.07
Page 6 of 6
The example above shows a connection with a capacitive divider.
The low voltage part of the divider must be dimensioned in a way that the 1 M
load imped-
ance of the instrument causes lower than 1 % error.
Example:
The high voltage capacitor (C
H
) is: 100 pF
For a 100 V output at 100 kV input we need a low voltage capacitor of: C
L
= 99 900 pF
The error, resulted by the 1 M
load is:
=( (1/2)*(
*R*C*L)
2
)
-1
= 0.2%
5.2
Measurement
Make the test set up using the example above.
Connect input green-yellow (GROUND) to laboratory ground
Connect input black (U
inL
) to ground point of divider
Connect input blue (U
inH
) to the dividing pint of divider
Switch on the instrument
Now you can begin the voltage measurement
Warning:
Although the instrument is safe, there is no protection against certain application errors
and carelessness. In case of unsteadiness please consult a senior specialist instead of
damaging the test object or the instrument.
Caution:
Do not forget that using the instrument you work in a high voltage environment. Thought-
less handling and switching can be lethal.
6
Servicing
Repair work and maintenance can only be done by qualified personnel of Presco AG. In
case of problems please contact the representative which delivered the instrument or
Presco AG directly.
