Performing measurements
35
In the case of PD activity, cloud-shaped clusters take shape over the course of the
measurement, the form and colour of which allow conclusions about the type of PD to
be made (e.g. corona discharge or surface discharge). This is described in detail in
specialist literature.
Example: One PD pulse with a level of 40 dBµV was measured after 7 ms (within a
20 ms mains frequency period). A green dot is drawn at this position. With each
additional pulse that strikes exactly this parameter, the colour increasingly changes to
red. After the number of pulses defined in the settings under
Max quantity
has been
measured in this position, then the dot is displayed in a vibrant red (end of the colour
scale shown). The colour is not modified any further. This allows the assumption to be
made that an infinitely long measurement would result in all dots (at least those inside
the cloud) being shown in red.
The screen can be deleted again using the trash symbol, and a new recording can
begin.
This screen is used to photograph the current measurement object, the station or
switching cell name, or any other special features, and to file the image together with the
actual measured data in the measured data folder.
If the green cross indicating which can be enabled /disabled (see page 47) appears in
the centre of the screen, it should be positioned as precisely as possible on the
identified problem area or any other point relevant to the measurement when capturing
the image. The green mark will then also be visible in the image file afterwards.
The
button functions as the shutter release in this screen, and is not used for saving
measured data.
Camera screen
