PM7000 Start Guide Issue 1 090608 27
Eighth Step:
Make a first recording with the PM7000 by measuring the live mains (or using
the Simulator)
Below we go through some basic steps to show you how to start a recording. These will be the
same whether you are practicing on the Simulator or doing it for real on the logger itself.
If using the PM7000, plugging it into the mains will give you readings of Phase A voltage. Let us
measure this voltage. If you don’t have a mains cable you will need to clip voltage probes onto
Phase A line and return.
We’ll use the default hook up connection that comes with the logger. This is 3 phase 4 wire wye.
The initial screen always indicates the hook up connection. See the simulator screen in the previous
section.
In a genuine 3 phase application it is valuable to check the vector diagram to make sure your
connections are correct. If all your phases appear to be in error by 90 degrees, check that you have
not physically installed voltage output CTs but selected flexible Rogowski coils in the logger set up,
or vice versa. If your Rogowski coils (or CT’s) are reversed this will be indicated on the vector
diagram and you will have the opportunity to correct the orientation in PmScreen under ‘Hook ups’.
Note. Using the simulator for this exercise will give you phase readings, doing a single phase live
measurement of the mains will not.
Click on
to produce the following ’Main Menu’ screen.
